Remove file that should never have been added
Oops.
diff --git a/library/ssl_cli.c.orig b/library/ssl_cli.c.orig
deleted file mode 100644
index 7f46cbb..0000000
--- a/library/ssl_cli.c.orig
+++ /dev/null
@@ -1,2876 +0,0 @@
-/*
- * SSLv3/TLSv1 client-side functions
- *
- * Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
- *
- * This file is part of mbed TLS (https://tls.mbed.org)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#if !defined(POLARSSL_CONFIG_FILE)
-#include "polarssl/config.h"
-#else
-#include POLARSSL_CONFIG_FILE
-#endif
-
-#if defined(POLARSSL_SSL_CLI_C)
-
-#include "polarssl/debug.h"
-#include "polarssl/ssl.h"
-
-#include <string.h>
-
-#if defined(POLARSSL_PLATFORM_C)
-#include "polarssl/platform.h"
-#else
-#include <stdlib.h>
-#define polarssl_malloc malloc
-#define polarssl_free free
-#endif
-
-#if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32)
-#include <basetsd.h>
-typedef UINT32 uint32_t;
-#else
-#include <inttypes.h>
-#endif
-
-#if defined(POLARSSL_HAVE_TIME)
-#include <time.h>
-#endif
-
-#if defined(POLARSSL_SSL_SESSION_TICKETS)
-/* Implementation that should never be optimized out by the compiler */
-static void polarssl_zeroize( void *v, size_t n ) {
- volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
-#endif
-
-#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
-static void ssl_write_hostname_ext( ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- *olen = 0;
-
- if( ssl->hostname == NULL )
- return;
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding server name extension: %s",
- ssl->hostname ) );
-
- /*
- * struct {
- * NameType name_type;
- * select (name_type) {
- * case host_name: HostName;
- * } name;
- * } ServerName;
- *
- * enum {
- * host_name(0), (255)
- * } NameType;
- *
- * opaque HostName<1..2^16-1>;
- *
- * struct {
- * ServerName server_name_list<1..2^16-1>
- * } ServerNameList;
- */
- *p++ = (unsigned char)( ( TLS_EXT_SERVERNAME >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_SERVERNAME ) & 0xFF );
-
- *p++ = (unsigned char)( ( (ssl->hostname_len + 5) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( (ssl->hostname_len + 5) ) & 0xFF );
-
- *p++ = (unsigned char)( ( (ssl->hostname_len + 3) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( (ssl->hostname_len + 3) ) & 0xFF );
-
- *p++ = (unsigned char)( ( TLS_EXT_SERVERNAME_HOSTNAME ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->hostname_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->hostname_len ) & 0xFF );
-
- memcpy( p, ssl->hostname, ssl->hostname_len );
-
- *olen = ssl->hostname_len + 9;
-}
-#endif /* POLARSSL_SSL_SERVER_NAME_INDICATION */
-
-#if defined(POLARSSL_SSL_RENEGOTIATION)
-static void ssl_write_renegotiation_ext( ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- *olen = 0;
-
- if( ssl->renegotiation != SSL_RENEGOTIATION )
- return;
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding renegotiation extension" ) );
-
- /*
- * Secure renegotiation
- */
- *p++ = (unsigned char)( ( TLS_EXT_RENEGOTIATION_INFO >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_RENEGOTIATION_INFO ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = ( ssl->verify_data_len + 1 ) & 0xFF;
- *p++ = ssl->verify_data_len & 0xFF;
-
- memcpy( p, ssl->own_verify_data, ssl->verify_data_len );
-
- *olen = 5 + ssl->verify_data_len;
-}
-#endif /* POLARSSL_SSL_RENEGOTIATION */
-
-/*
- * Only if we handle at least one key exchange that needs signatures.
- */
-#if defined(POLARSSL_SSL_PROTO_TLS1_2) && \
- defined(POLARSSL_KEY_EXCHANGE__WITH_CERT__ENABLED)
-static void ssl_write_signature_algorithms_ext( ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- size_t sig_alg_len = 0;
-#if defined(POLARSSL_RSA_C) || defined(POLARSSL_ECDSA_C)
- unsigned char *sig_alg_list = buf + 6;
-#endif
-
- *olen = 0;
-
- if( ssl->max_minor_ver != SSL_MINOR_VERSION_3 )
- return;
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding signature_algorithms extension" ) );
-
- /*
- * Prepare signature_algorithms extension (TLS 1.2)
- */
-#if defined(POLARSSL_RSA_C)
-#if defined(POLARSSL_SHA512_C)
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA512;
- sig_alg_list[sig_alg_len++] = SSL_SIG_RSA;
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA384;
- sig_alg_list[sig_alg_len++] = SSL_SIG_RSA;
-#endif
-#if defined(POLARSSL_SHA256_C)
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA256;
- sig_alg_list[sig_alg_len++] = SSL_SIG_RSA;
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA224;
- sig_alg_list[sig_alg_len++] = SSL_SIG_RSA;
-#endif
-#if defined(POLARSSL_SHA1_C)
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA1;
- sig_alg_list[sig_alg_len++] = SSL_SIG_RSA;
-#endif
-#if defined(POLARSSL_MD5_C)
- sig_alg_list[sig_alg_len++] = SSL_HASH_MD5;
- sig_alg_list[sig_alg_len++] = SSL_SIG_RSA;
-#endif
-#endif /* POLARSSL_RSA_C */
-#if defined(POLARSSL_ECDSA_C)
-#if defined(POLARSSL_SHA512_C)
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA512;
- sig_alg_list[sig_alg_len++] = SSL_SIG_ECDSA;
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA384;
- sig_alg_list[sig_alg_len++] = SSL_SIG_ECDSA;
-#endif
-#if defined(POLARSSL_SHA256_C)
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA256;
- sig_alg_list[sig_alg_len++] = SSL_SIG_ECDSA;
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA224;
- sig_alg_list[sig_alg_len++] = SSL_SIG_ECDSA;
-#endif
-#if defined(POLARSSL_SHA1_C)
- sig_alg_list[sig_alg_len++] = SSL_HASH_SHA1;
- sig_alg_list[sig_alg_len++] = SSL_SIG_ECDSA;
-#endif
-#if defined(POLARSSL_MD5_C)
- sig_alg_list[sig_alg_len++] = SSL_HASH_MD5;
- sig_alg_list[sig_alg_len++] = SSL_SIG_ECDSA;
-#endif
-#endif /* POLARSSL_ECDSA_C */
-
- /*
- * enum {
- * none(0), md5(1), sha1(2), sha224(3), sha256(4), sha384(5),
- * sha512(6), (255)
- * } HashAlgorithm;
- *
- * enum { anonymous(0), rsa(1), dsa(2), ecdsa(3), (255) }
- * SignatureAlgorithm;
- *
- * struct {
- * HashAlgorithm hash;
- * SignatureAlgorithm signature;
- * } SignatureAndHashAlgorithm;
- *
- * SignatureAndHashAlgorithm
- * supported_signature_algorithms<2..2^16-2>;
- */
- *p++ = (unsigned char)( ( TLS_EXT_SIG_ALG >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_SIG_ALG ) & 0xFF );
-
- *p++ = (unsigned char)( ( ( sig_alg_len + 2 ) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ( sig_alg_len + 2 ) ) & 0xFF );
-
- *p++ = (unsigned char)( ( sig_alg_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( sig_alg_len ) & 0xFF );
-
- *olen = 6 + sig_alg_len;
-}
-#endif /* POLARSSL_SSL_PROTO_TLS1_2 &&
- POLARSSL_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
-#if defined(POLARSSL_ECDH_C) || defined(POLARSSL_ECDSA_C)
-static void ssl_write_supported_elliptic_curves_ext( ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- unsigned char *elliptic_curve_list = p + 6;
- size_t elliptic_curve_len = 0;
- const ecp_curve_info *info;
-#if defined(POLARSSL_SSL_SET_CURVES)
- const ecp_group_id *grp_id;
-#else
- ((void) ssl);
-#endif
-
- *olen = 0;
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding supported_elliptic_curves extension" ) );
-
-#if defined(POLARSSL_SSL_SET_CURVES)
- for( grp_id = ssl->curve_list; *grp_id != POLARSSL_ECP_DP_NONE; grp_id++ )
- {
- info = ecp_curve_info_from_grp_id( *grp_id );
-#else
- for( info = ecp_curve_list(); info->grp_id != POLARSSL_ECP_DP_NONE; info++ )
- {
-#endif
-
- elliptic_curve_list[elliptic_curve_len++] = info->tls_id >> 8;
- elliptic_curve_list[elliptic_curve_len++] = info->tls_id & 0xFF;
- }
-
- if( elliptic_curve_len == 0 )
- return;
-
- *p++ = (unsigned char)( ( TLS_EXT_SUPPORTED_ELLIPTIC_CURVES >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_SUPPORTED_ELLIPTIC_CURVES ) & 0xFF );
-
- *p++ = (unsigned char)( ( ( elliptic_curve_len + 2 ) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ( elliptic_curve_len + 2 ) ) & 0xFF );
-
- *p++ = (unsigned char)( ( ( elliptic_curve_len ) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ( elliptic_curve_len ) ) & 0xFF );
-
- *olen = 6 + elliptic_curve_len;
-}
-
-static void ssl_write_supported_point_formats_ext( ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- ((void) ssl);
-
- *olen = 0;
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding supported_point_formats extension" ) );
-
- *p++ = (unsigned char)( ( TLS_EXT_SUPPORTED_POINT_FORMATS >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_SUPPORTED_POINT_FORMATS ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 2;
-
- *p++ = 1;
- *p++ = POLARSSL_ECP_PF_UNCOMPRESSED;
-
- *olen = 6;
-}
-#endif /* POLARSSL_ECDH_C || POLARSSL_ECDSA_C */
-
-#if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH)
-static void ssl_write_max_fragment_length_ext( ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->mfl_code == SSL_MAX_FRAG_LEN_NONE ) {
- *olen = 0;
- return;
- }
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding max_fragment_length extension" ) );
-
- *p++ = (unsigned char)( ( TLS_EXT_MAX_FRAGMENT_LENGTH >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_MAX_FRAGMENT_LENGTH ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 1;
-
- *p++ = ssl->mfl_code;
-
- *olen = 5;
-}
-#endif /* POLARSSL_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(POLARSSL_SSL_TRUNCATED_HMAC)
-static void ssl_write_truncated_hmac_ext( ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->trunc_hmac == SSL_TRUNC_HMAC_DISABLED )
- {
- *olen = 0;
- return;
- }
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding truncated_hmac extension" ) );
-
- *p++ = (unsigned char)( ( TLS_EXT_TRUNCATED_HMAC >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_TRUNCATED_HMAC ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* POLARSSL_SSL_TRUNCATED_HMAC */
-
-#if defined(POLARSSL_SSL_ENCRYPT_THEN_MAC)
-static void ssl_write_encrypt_then_mac_ext( ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->encrypt_then_mac == SSL_ETM_DISABLED ||
- ssl->max_minor_ver == SSL_MINOR_VERSION_0 )
- {
- *olen = 0;
- return;
- }
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding encrypt_then_mac "
- "extension" ) );
-
- *p++ = (unsigned char)( ( TLS_EXT_ENCRYPT_THEN_MAC >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_ENCRYPT_THEN_MAC ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* POLARSSL_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(POLARSSL_SSL_EXTENDED_MASTER_SECRET)
-static void ssl_write_extended_ms_ext( ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->extended_ms == SSL_EXTENDED_MS_DISABLED ||
- ssl->max_minor_ver == SSL_MINOR_VERSION_0 )
- {
- *olen = 0;
- return;
- }
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding extended_master_secret "
- "extension" ) );
-
- *p++ = (unsigned char)( ( TLS_EXT_EXTENDED_MASTER_SECRET >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_EXTENDED_MASTER_SECRET ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* POLARSSL_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(POLARSSL_SSL_SESSION_TICKETS)
-static void ssl_write_session_ticket_ext( ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
- size_t tlen = ssl->session_negotiate->ticket_len;
-
- if( ssl->session_tickets == SSL_SESSION_TICKETS_DISABLED )
- {
- *olen = 0;
- return;
- }
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding session ticket extension" ) );
-
- *p++ = (unsigned char)( ( TLS_EXT_SESSION_TICKET >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_SESSION_TICKET ) & 0xFF );
-
- *p++ = (unsigned char)( ( tlen >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( tlen ) & 0xFF );
-
- *olen = 4;
-
- if( ssl->session_negotiate->ticket == NULL ||
- ssl->session_negotiate->ticket_len == 0 )
- {
- return;
- }
-
- SSL_DEBUG_MSG( 3, ( "sending session ticket of length %d", tlen ) );
-
- memcpy( p, ssl->session_negotiate->ticket, tlen );
-
- *olen += tlen;
-}
-#endif /* POLARSSL_SSL_SESSION_TICKETS */
-
-#if defined(POLARSSL_SSL_ALPN)
-static void ssl_write_alpn_ext( ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
- const char **cur;
-
- if( ssl->alpn_list == NULL )
- {
- *olen = 0;
- return;
- }
-
- SSL_DEBUG_MSG( 3, ( "client hello, adding alpn extension" ) );
-
- *p++ = (unsigned char)( ( TLS_EXT_ALPN >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( TLS_EXT_ALPN ) & 0xFF );
-
- /*
- * opaque ProtocolName<1..2^8-1>;
- *
- * struct {
- * ProtocolName protocol_name_list<2..2^16-1>
- * } ProtocolNameList;
- */
-
- /* Skip writing extension and list length for now */
- p += 4;
-
- for( cur = ssl->alpn_list; *cur != NULL; cur++ )
- {
- *p = (unsigned char)( strlen( *cur ) & 0xFF );
- memcpy( p + 1, *cur, *p );
- p += 1 + *p;
- }
-
- *olen = p - buf;
-
- /* List length = olen - 2 (ext_type) - 2 (ext_len) - 2 (list_len) */
- buf[4] = (unsigned char)( ( ( *olen - 6 ) >> 8 ) & 0xFF );
- buf[5] = (unsigned char)( ( ( *olen - 6 ) ) & 0xFF );
-
- /* Extension length = olen - 2 (ext_type) - 2 (ext_len) */
- buf[2] = (unsigned char)( ( ( *olen - 4 ) >> 8 ) & 0xFF );
- buf[3] = (unsigned char)( ( ( *olen - 4 ) ) & 0xFF );
-}
-#endif /* POLARSSL_SSL_ALPN */
-
-static int ssl_write_client_hello( ssl_context *ssl )
-{
- int ret;
- size_t i, n, olen, ext_len = 0;
- unsigned char *buf;
- unsigned char *p, *q;
-#if defined(POLARSSL_HAVE_TIME)
- time_t t;
-#endif
- const int *ciphersuites;
- const ssl_ciphersuite_t *ciphersuite_info;
-
- SSL_DEBUG_MSG( 2, ( "=> write client hello" ) );
-
- if( ssl->f_rng == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "no RNG provided") );
- return( POLARSSL_ERR_SSL_NO_RNG );
- }
-
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- if( ssl->renegotiation == SSL_INITIAL_HANDSHAKE )
-#endif
- {
- ssl->major_ver = ssl->min_major_ver;
- ssl->minor_ver = ssl->min_minor_ver;
- }
-
- if( ssl->max_major_ver == 0 && ssl->max_minor_ver == 0 )
- {
- ssl->max_major_ver = SSL_MAX_MAJOR_VERSION;
- ssl->max_minor_ver = SSL_MAX_MINOR_VERSION;
- }
-
- /*
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 5 highest version supported
- * 6 . 9 current UNIX time
- * 10 . 37 random bytes
- */
- buf = ssl->out_msg;
- p = buf + 4;
-
- *p++ = (unsigned char) ssl->max_major_ver;
- *p++ = (unsigned char) ssl->max_minor_ver;
-
- SSL_DEBUG_MSG( 3, ( "client hello, max version: [%d:%d]",
- buf[4], buf[5] ) );
-
-#if defined(POLARSSL_HAVE_TIME)
- t = time( NULL );
- *p++ = (unsigned char)( t >> 24 );
- *p++ = (unsigned char)( t >> 16 );
- *p++ = (unsigned char)( t >> 8 );
- *p++ = (unsigned char)( t );
-
- SSL_DEBUG_MSG( 3, ( "client hello, current time: %lu", t ) );
-#else
- if( ( ret = ssl->f_rng( ssl->p_rng, p, 4 ) ) != 0 )
- return( ret );
-
- p += 4;
-#endif /* POLARSSL_HAVE_TIME */
-
- if( ( ret = ssl->f_rng( ssl->p_rng, p, 28 ) ) != 0 )
- return( ret );
-
- p += 28;
-
- memcpy( ssl->handshake->randbytes, buf + 6, 32 );
-
- SSL_DEBUG_BUF( 3, "client hello, random bytes", buf + 6, 32 );
-
- /*
- * 38 . 38 session id length
- * 39 . 39+n session id
- * 40+n . 41+n ciphersuitelist length
- * 42+n . .. ciphersuitelist
- * .. . .. compression methods length
- * .. . .. compression methods
- * .. . .. extensions length
- * .. . .. extensions
- */
- n = ssl->session_negotiate->length;
-
- if( n < 16 || n > 32 ||
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- ssl->renegotiation != SSL_INITIAL_HANDSHAKE ||
-#endif
- ssl->handshake->resume == 0 )
- {
- n = 0;
- }
-
-#if defined(POLARSSL_SSL_SESSION_TICKETS)
- /*
- * RFC 5077 section 3.4: "When presenting a ticket, the client MAY
- * generate and include a Session ID in the TLS ClientHello."
- */
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- if( ssl->renegotiation == SSL_INITIAL_HANDSHAKE )
-#endif
- {
- if( ssl->session_negotiate->ticket != NULL &&
- ssl->session_negotiate->ticket_len != 0 )
- {
- ret = ssl->f_rng( ssl->p_rng, ssl->session_negotiate->id, 32 );
-
- if( ret != 0 )
- return( ret );
-
- ssl->session_negotiate->length = n = 32;
- }
- }
-#endif /* POLARSSL_SSL_SESSION_TICKETS */
-
- *p++ = (unsigned char) n;
-
- for( i = 0; i < n; i++ )
- *p++ = ssl->session_negotiate->id[i];
-
- SSL_DEBUG_MSG( 3, ( "client hello, session id len.: %d", n ) );
- SSL_DEBUG_BUF( 3, "client hello, session id", buf + 39, n );
-
- ciphersuites = ssl->ciphersuite_list[ssl->minor_ver];
- n = 0;
- q = p;
-
- // Skip writing ciphersuite length for now
- p += 2;
-
- for( i = 0; ciphersuites[i] != 0; i++ )
- {
- ciphersuite_info = ssl_ciphersuite_from_id( ciphersuites[i] );
-
- if( ciphersuite_info == NULL )
- continue;
-
- if( ciphersuite_info->min_minor_ver > ssl->max_minor_ver ||
- ciphersuite_info->max_minor_ver < ssl->min_minor_ver )
- continue;
-
- if( ssl->arc4_disabled == SSL_ARC4_DISABLED &&
- ciphersuite_info->cipher == POLARSSL_CIPHER_ARC4_128 )
- continue;
-
- SSL_DEBUG_MSG( 3, ( "client hello, add ciphersuite: %2d",
- ciphersuites[i] ) );
-
- n++;
- *p++ = (unsigned char)( ciphersuites[i] >> 8 );
- *p++ = (unsigned char)( ciphersuites[i] );
- }
-
- /*
- * Add TLS_EMPTY_RENEGOTIATION_INFO_SCSV
- */
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- if( ssl->renegotiation == SSL_INITIAL_HANDSHAKE )
-#endif
- {
- *p++ = (unsigned char)( SSL_EMPTY_RENEGOTIATION_INFO >> 8 );
- *p++ = (unsigned char)( SSL_EMPTY_RENEGOTIATION_INFO );
- n++;
- }
-
- /* Some versions of OpenSSL don't handle it correctly if not at end */
-#if defined(POLARSSL_SSL_FALLBACK_SCSV)
- if( ssl->fallback == SSL_IS_FALLBACK )
- {
- SSL_DEBUG_MSG( 3, ( "adding FALLBACK_SCSV" ) );
- *p++ = (unsigned char)( SSL_FALLBACK_SCSV >> 8 );
- *p++ = (unsigned char)( SSL_FALLBACK_SCSV );
- n++;
- }
-#endif
-
- *q++ = (unsigned char)( n >> 7 );
- *q++ = (unsigned char)( n << 1 );
-
- SSL_DEBUG_MSG( 3, ( "client hello, got %d ciphersuites", n ) );
-
-
-#if defined(POLARSSL_ZLIB_SUPPORT)
- SSL_DEBUG_MSG( 3, ( "client hello, compress len.: %d", 2 ) );
- SSL_DEBUG_MSG( 3, ( "client hello, compress alg.: %d %d",
- SSL_COMPRESS_DEFLATE, SSL_COMPRESS_NULL ) );
-
- *p++ = 2;
- *p++ = SSL_COMPRESS_DEFLATE;
- *p++ = SSL_COMPRESS_NULL;
-#else
- SSL_DEBUG_MSG( 3, ( "client hello, compress len.: %d", 1 ) );
- SSL_DEBUG_MSG( 3, ( "client hello, compress alg.: %d", SSL_COMPRESS_NULL ) );
-
- *p++ = 1;
- *p++ = SSL_COMPRESS_NULL;
-#endif /* POLARSSL_ZLIB_SUPPORT */
-
- // First write extensions, then the total length
- //
-#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
- ssl_write_hostname_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- ssl_write_renegotiation_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(POLARSSL_SSL_PROTO_TLS1_2) && \
- defined(POLARSSL_KEY_EXCHANGE__WITH_CERT__ENABLED)
- ssl_write_signature_algorithms_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(POLARSSL_ECDH_C) || defined(POLARSSL_ECDSA_C)
- ssl_write_supported_elliptic_curves_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-
- ssl_write_supported_point_formats_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH)
- ssl_write_max_fragment_length_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(POLARSSL_SSL_TRUNCATED_HMAC)
- ssl_write_truncated_hmac_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(POLARSSL_SSL_ENCRYPT_THEN_MAC)
- ssl_write_encrypt_then_mac_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(POLARSSL_SSL_EXTENDED_MASTER_SECRET)
- ssl_write_extended_ms_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(POLARSSL_SSL_SESSION_TICKETS)
- ssl_write_session_ticket_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(POLARSSL_SSL_ALPN)
- ssl_write_alpn_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
- /* olen unused if all extensions are disabled */
- ((void) olen);
-
- SSL_DEBUG_MSG( 3, ( "client hello, total extension length: %d",
- ext_len ) );
-
- if( ext_len > 0 )
- {
- *p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ext_len ) & 0xFF );
- p += ext_len;
- }
-
- ssl->out_msglen = p - buf;
- ssl->out_msgtype = SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = SSL_HS_CLIENT_HELLO;
-
- ssl->state++;
-
- if( ( ret = ssl_write_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_write_record", ret );
- return( ret );
- }
-
- SSL_DEBUG_MSG( 2, ( "<= write client hello" ) );
-
- return( 0 );
-}
-
-static int ssl_parse_renegotiation_info( ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- int ret;
-
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- if( ssl->renegotiation != SSL_INITIAL_HANDSHAKE )
- {
- /* Check verify-data in constant-time. The length OTOH is no secret */
- if( len != 1 + ssl->verify_data_len * 2 ||
- buf[0] != ssl->verify_data_len * 2 ||
- safer_memcmp( buf + 1,
- ssl->own_verify_data, ssl->verify_data_len ) != 0 ||
- safer_memcmp( buf + 1 + ssl->verify_data_len,
- ssl->peer_verify_data, ssl->verify_data_len ) != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
-
- if( ( ret = ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
- return( ret );
-
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- }
- else
-#endif /* POLARSSL_SSL_RENEGOTIATION */
- {
- if( len != 1 || buf[0] != 0x00 )
- {
- SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
-
- if( ( ret = ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
- return( ret );
-
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ssl->secure_renegotiation = SSL_SECURE_RENEGOTIATION;
- }
-
- return( 0 );
-}
-
-#if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH)
-static int ssl_parse_max_fragment_length_ext( ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- /*
- * server should use the extension only if we did,
- * and if so the server's value should match ours (and len is always 1)
- */
- if( ssl->mfl_code == SSL_MAX_FRAG_LEN_NONE ||
- len != 1 ||
- buf[0] != ssl->mfl_code )
- {
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- return( 0 );
-}
-#endif /* POLARSSL_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(POLARSSL_SSL_TRUNCATED_HMAC)
-static int ssl_parse_truncated_hmac_ext( ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->trunc_hmac == SSL_TRUNC_HMAC_DISABLED ||
- len != 0 )
- {
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->session_negotiate->trunc_hmac = SSL_TRUNC_HMAC_ENABLED;
-
- return( 0 );
-}
-#endif /* POLARSSL_SSL_TRUNCATED_HMAC */
-
-#if defined(POLARSSL_SSL_ENCRYPT_THEN_MAC)
-static int ssl_parse_encrypt_then_mac_ext( ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->encrypt_then_mac == SSL_ETM_DISABLED ||
- ssl->minor_ver == SSL_MINOR_VERSION_0 ||
- len != 0 )
- {
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->session_negotiate->encrypt_then_mac = SSL_ETM_ENABLED;
-
- return( 0 );
-}
-#endif /* POLARSSL_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(POLARSSL_SSL_EXTENDED_MASTER_SECRET)
-static int ssl_parse_extended_ms_ext( ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->extended_ms == SSL_EXTENDED_MS_DISABLED ||
- ssl->minor_ver == SSL_MINOR_VERSION_0 ||
- len != 0 )
- {
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->handshake->extended_ms = SSL_EXTENDED_MS_ENABLED;
-
- return( 0 );
-}
-#endif /* POLARSSL_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(POLARSSL_SSL_SESSION_TICKETS)
-static int ssl_parse_session_ticket_ext( ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->session_tickets == SSL_SESSION_TICKETS_DISABLED ||
- len != 0 )
- {
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->handshake->new_session_ticket = 1;
-
- return( 0 );
-}
-#endif /* POLARSSL_SSL_SESSION_TICKETS */
-
-#if defined(POLARSSL_ECDH_C) || defined(POLARSSL_ECDSA_C)
-static int ssl_parse_supported_point_formats_ext( ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- size_t list_size;
- const unsigned char *p;
-
- list_size = buf[0];
- if( list_size + 1 != len )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- p = buf + 1;
- while( list_size > 0 )
- {
- if( p[0] == POLARSSL_ECP_PF_UNCOMPRESSED ||
- p[0] == POLARSSL_ECP_PF_COMPRESSED )
- {
- ssl->handshake->ecdh_ctx.point_format = p[0];
- SSL_DEBUG_MSG( 4, ( "point format selected: %d", p[0] ) );
- return( 0 );
- }
-
- list_size--;
- p++;
- }
-
- SSL_DEBUG_MSG( 1, ( "no point format in common" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
-}
-#endif /* POLARSSL_ECDH_C || POLARSSL_ECDSA_C */
-
-#if defined(POLARSSL_SSL_ALPN)
-static int ssl_parse_alpn_ext( ssl_context *ssl,
- const unsigned char *buf, size_t len )
-{
- size_t list_len, name_len;
- const char **p;
-
- /* If we didn't send it, the server shouldn't send it */
- if( ssl->alpn_list == NULL )
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
-
- /*
- * opaque ProtocolName<1..2^8-1>;
- *
- * struct {
- * ProtocolName protocol_name_list<2..2^16-1>
- * } ProtocolNameList;
- *
- * the "ProtocolNameList" MUST contain exactly one "ProtocolName"
- */
-
- /* Min length is 2 (list_len) + 1 (name_len) + 1 (name) */
- if( len < 4 )
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
-
- list_len = ( buf[0] << 8 ) | buf[1];
- if( list_len != len - 2 )
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
-
- name_len = buf[2];
- if( name_len != list_len - 1 )
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
-
- /* Check that the server chosen protocol was in our list and save it */
- for( p = ssl->alpn_list; *p != NULL; p++ )
- {
- if( name_len == strlen( *p ) &&
- memcmp( buf + 3, *p, name_len ) == 0 )
- {
- ssl->alpn_chosen = *p;
- return( 0 );
- }
- }
-
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
-}
-#endif /* POLARSSL_SSL_ALPN */
-
-static int ssl_parse_server_hello( ssl_context *ssl )
-{
- int ret, i, comp;
- size_t n;
- size_t ext_len;
- unsigned char *buf, *ext;
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- int renegotiation_info_seen = 0;
-#endif
- int handshake_failure = 0;
- const ssl_ciphersuite_t *suite_info;
-#if defined(POLARSSL_DEBUG_C)
- uint32_t t;
-#endif
-
- SSL_DEBUG_MSG( 2, ( "=> parse server hello" ) );
-
- /*
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 5 protocol version
- * 6 . 9 UNIX time()
- * 10 . 37 random bytes
- */
- buf = ssl->in_msg;
-
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
- {
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- if( ssl->renegotiation == SSL_RENEGOTIATION )
- {
- ssl->renego_records_seen++;
-
- if( ssl->renego_max_records >= 0 &&
- ssl->renego_records_seen > ssl->renego_max_records )
- {
- SSL_DEBUG_MSG( 1, ( "renegotiation requested, "
- "but not honored by server" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- SSL_DEBUG_MSG( 1, ( "non-handshake message during renego" ) );
- return( POLARSSL_ERR_SSL_WAITING_SERVER_HELLO_RENEGO );
- }
-#endif /* POLARSSL_SSL_RENEGOTIATION */
-
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- SSL_DEBUG_MSG( 3, ( "server hello, chosen version: [%d:%d]",
- buf[4], buf[5] ) );
-
- if( ssl->in_hslen < 42 ||
- buf[0] != SSL_HS_SERVER_HELLO ||
- buf[4] != SSL_MAJOR_VERSION_3 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- if( buf[5] > ssl->max_minor_ver )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ssl->minor_ver = buf[5];
-
- if( ssl->minor_ver < ssl->min_minor_ver )
- {
- SSL_DEBUG_MSG( 1, ( "server only supports ssl smaller than minimum"
- " [%d:%d] < [%d:%d]", ssl->major_ver,
- ssl->minor_ver, buf[4], buf[5] ) );
-
- ssl_send_alert_message( ssl, SSL_ALERT_LEVEL_FATAL,
- SSL_ALERT_MSG_PROTOCOL_VERSION );
-
- return( POLARSSL_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
- }
-
-#if defined(POLARSSL_DEBUG_C)
- t = ( (uint32_t) buf[6] << 24 )
- | ( (uint32_t) buf[7] << 16 )
- | ( (uint32_t) buf[8] << 8 )
- | ( (uint32_t) buf[9] );
- SSL_DEBUG_MSG( 3, ( "server hello, current time: %lu", t ) );
-#endif
-
- memcpy( ssl->handshake->randbytes + 32, buf + 6, 32 );
-
- n = buf[38];
-
- SSL_DEBUG_BUF( 3, "server hello, random bytes", buf + 6, 32 );
-
- if( n > 32 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- /*
- * 38 . 38 session id length
- * 39 . 38+n session id
- * 39+n . 40+n chosen ciphersuite
- * 41+n . 41+n chosen compression alg.
- * 42+n . 43+n extensions length
- * 44+n . 44+n+m extensions
- */
- if( ssl->in_hslen > 43 + n )
- {
- ext_len = ( ( buf[42 + n] << 8 )
- | ( buf[43 + n] ) );
-
- if( ( ext_len > 0 && ext_len < 4 ) ||
- ssl->in_hslen != 44 + n + ext_len )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- }
- else if( ssl->in_hslen == 42 + n )
- {
- ext_len = 0;
- }
- else
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- i = ( buf[39 + n] << 8 ) | buf[40 + n];
- comp = buf[41 + n];
-
- /*
- * Initialize update checksum functions
- */
- ssl->transform_negotiate->ciphersuite_info = ssl_ciphersuite_from_id( i );
-
- if( ssl->transform_negotiate->ciphersuite_info == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "ciphersuite info for %04x not found", i ) );
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- }
-
- ssl_optimize_checksum( ssl, ssl->transform_negotiate->ciphersuite_info );
-
- SSL_DEBUG_MSG( 3, ( "server hello, session id len.: %d", n ) );
- SSL_DEBUG_BUF( 3, "server hello, session id", buf + 39, n );
-
- /*
- * Check if the session can be resumed
- */
- if( ssl->handshake->resume == 0 || n == 0 ||
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- ssl->renegotiation != SSL_INITIAL_HANDSHAKE ||
-#endif
- ssl->session_negotiate->ciphersuite != i ||
- ssl->session_negotiate->compression != comp ||
- ssl->session_negotiate->length != n ||
- memcmp( ssl->session_negotiate->id, buf + 39, n ) != 0 )
- {
- ssl->state++;
- ssl->handshake->resume = 0;
-#if defined(POLARSSL_HAVE_TIME)
- ssl->session_negotiate->start = time( NULL );
-#endif
- ssl->session_negotiate->ciphersuite = i;
- ssl->session_negotiate->compression = comp;
- ssl->session_negotiate->length = n;
- memcpy( ssl->session_negotiate->id, buf + 39, n );
- }
- else
- {
- ssl->state = SSL_SERVER_CHANGE_CIPHER_SPEC;
-
- if( ( ret = ssl_derive_keys( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_derive_keys", ret );
- return( ret );
- }
- }
-
- SSL_DEBUG_MSG( 3, ( "%s session has been resumed",
- ssl->handshake->resume ? "a" : "no" ) );
-
- SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: %d", i ) );
- SSL_DEBUG_MSG( 3, ( "server hello, compress alg.: %d", buf[41 + n] ) );
-
- suite_info = ssl_ciphersuite_from_id( ssl->session_negotiate->ciphersuite );
- if( suite_info == NULL ||
- ( ssl->arc4_disabled &&
- suite_info->cipher == POLARSSL_CIPHER_ARC4_128 ) )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
-
- i = 0;
- while( 1 )
- {
- if( ssl->ciphersuite_list[ssl->minor_ver][i] == 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- if( ssl->ciphersuite_list[ssl->minor_ver][i++] ==
- ssl->session_negotiate->ciphersuite )
- {
- break;
- }
- }
-
- if( comp != SSL_COMPRESS_NULL
-#if defined(POLARSSL_ZLIB_SUPPORT)
- && comp != SSL_COMPRESS_DEFLATE
-#endif
- )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- ssl->session_negotiate->compression = comp;
-
- ext = buf + 44 + n;
-
- SSL_DEBUG_MSG( 2, ( "server hello, total extension length: %d", ext_len ) );
-
- while( ext_len )
- {
- unsigned int ext_id = ( ( ext[0] << 8 )
- | ( ext[1] ) );
- unsigned int ext_size = ( ( ext[2] << 8 )
- | ( ext[3] ) );
-
- if( ext_size + 4 > ext_len )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- switch( ext_id )
- {
- case TLS_EXT_RENEGOTIATION_INFO:
- SSL_DEBUG_MSG( 3, ( "found renegotiation extension" ) );
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- renegotiation_info_seen = 1;
-#endif
-
- if( ( ret = ssl_parse_renegotiation_info( ssl, ext + 4,
- ext_size ) ) != 0 )
- return( ret );
-
- break;
-
-#if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH)
- case TLS_EXT_MAX_FRAGMENT_LENGTH:
- SSL_DEBUG_MSG( 3, ( "found max_fragment_length extension" ) );
-
- if( ( ret = ssl_parse_max_fragment_length_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* POLARSSL_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(POLARSSL_SSL_TRUNCATED_HMAC)
- case TLS_EXT_TRUNCATED_HMAC:
- SSL_DEBUG_MSG( 3, ( "found truncated_hmac extension" ) );
-
- if( ( ret = ssl_parse_truncated_hmac_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* POLARSSL_SSL_TRUNCATED_HMAC */
-
-#if defined(POLARSSL_SSL_ENCRYPT_THEN_MAC)
- case TLS_EXT_ENCRYPT_THEN_MAC:
- SSL_DEBUG_MSG( 3, ( "found encrypt_then_mac extension" ) );
-
- if( ( ret = ssl_parse_encrypt_then_mac_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* POLARSSL_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(POLARSSL_SSL_EXTENDED_MASTER_SECRET)
- case TLS_EXT_EXTENDED_MASTER_SECRET:
- SSL_DEBUG_MSG( 3, ( "found extended_master_secret extension" ) );
-
- if( ( ret = ssl_parse_extended_ms_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* POLARSSL_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(POLARSSL_SSL_SESSION_TICKETS)
- case TLS_EXT_SESSION_TICKET:
- SSL_DEBUG_MSG( 3, ( "found session_ticket extension" ) );
-
- if( ( ret = ssl_parse_session_ticket_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* POLARSSL_SSL_SESSION_TICKETS */
-
-#if defined(POLARSSL_ECDH_C) || defined(POLARSSL_ECDSA_C)
- case TLS_EXT_SUPPORTED_POINT_FORMATS:
- SSL_DEBUG_MSG( 3, ( "found supported_point_formats extension" ) );
-
- if( ( ret = ssl_parse_supported_point_formats_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* POLARSSL_ECDH_C || POLARSSL_ECDSA_C */
-
-#if defined(POLARSSL_SSL_ALPN)
- case TLS_EXT_ALPN:
- SSL_DEBUG_MSG( 3, ( "found alpn extension" ) );
-
- if( ( ret = ssl_parse_alpn_ext( ssl, ext + 4, ext_size ) ) != 0 )
- return( ret );
-
- break;
-#endif /* POLARSSL_SSL_ALPN */
-
- default:
- SSL_DEBUG_MSG( 3, ( "unknown extension found: %d (ignoring)",
- ext_id ) );
- }
-
- ext_len -= 4 + ext_size;
- ext += 4 + ext_size;
-
- if( ext_len > 0 && ext_len < 4 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- }
-
- /*
- * Renegotiation security checks
- */
- if( ssl->secure_renegotiation == SSL_LEGACY_RENEGOTIATION &&
- ssl->allow_legacy_renegotiation == SSL_LEGACY_BREAK_HANDSHAKE )
- {
- SSL_DEBUG_MSG( 1, ( "legacy renegotiation, breaking off handshake" ) );
- handshake_failure = 1;
- }
-#if defined(POLARSSL_SSL_RENEGOTIATION)
- else if( ssl->renegotiation == SSL_RENEGOTIATION &&
- ssl->secure_renegotiation == SSL_SECURE_RENEGOTIATION &&
- renegotiation_info_seen == 0 )
- {
- SSL_DEBUG_MSG( 1, ( "renegotiation_info extension missing (secure)" ) );
- handshake_failure = 1;
- }
- else if( ssl->renegotiation == SSL_RENEGOTIATION &&
- ssl->secure_renegotiation == SSL_LEGACY_RENEGOTIATION &&
- ssl->allow_legacy_renegotiation == SSL_LEGACY_NO_RENEGOTIATION )
- {
- SSL_DEBUG_MSG( 1, ( "legacy renegotiation not allowed" ) );
- handshake_failure = 1;
- }
- else if( ssl->renegotiation == SSL_RENEGOTIATION &&
- ssl->secure_renegotiation == SSL_LEGACY_RENEGOTIATION &&
- renegotiation_info_seen == 1 )
- {
- SSL_DEBUG_MSG( 1, ( "renegotiation_info extension present (legacy)" ) );
- handshake_failure = 1;
- }
-#endif /* POLARSSL_SSL_RENEGOTIATION */
-
- if( handshake_failure == 1 )
- {
- if( ( ret = ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
- return( ret );
-
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- SSL_DEBUG_MSG( 2, ( "<= parse server hello" ) );
-
- return( 0 );
-}
-
-#if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED)
-static int ssl_parse_server_dh_params( ssl_context *ssl, unsigned char **p,
- unsigned char *end )
-{
- int ret = POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE;
-
- /*
- * Ephemeral DH parameters:
- *
- * struct {
- * opaque dh_p<1..2^16-1>;
- * opaque dh_g<1..2^16-1>;
- * opaque dh_Ys<1..2^16-1>;
- * } ServerDHParams;
- */
- if( ( ret = dhm_read_params( &ssl->handshake->dhm_ctx, p, end ) ) != 0 )
- {
- SSL_DEBUG_RET( 2, ( "dhm_read_params" ), ret );
- return( ret );
- }
-
- if( ssl->handshake->dhm_ctx.len < SSL_MIN_DHM_BYTES ||
- ssl->handshake->dhm_ctx.len > 512 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message (DHM length)" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- SSL_DEBUG_MPI( 3, "DHM: P ", &ssl->handshake->dhm_ctx.P );
- SSL_DEBUG_MPI( 3, "DHM: G ", &ssl->handshake->dhm_ctx.G );
- SSL_DEBUG_MPI( 3, "DHM: GY", &ssl->handshake->dhm_ctx.GY );
-
- return( ret );
-}
-#endif /* POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED */
-
-#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
-static int ssl_check_server_ecdh_params( const ssl_context *ssl )
-{
- const ecp_curve_info *curve_info;
-
- curve_info = ecp_curve_info_from_grp_id( ssl->handshake->ecdh_ctx.grp.id );
- if( curve_info == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( POLARSSL_ERR_SSL_INTERNAL_ERROR );
- }
-
- SSL_DEBUG_MSG( 2, ( "ECDH curve: %s", curve_info->name ) );
-
-#if defined(POLARSSL_SSL_SET_CURVES)
- if( ! ssl_curve_is_acceptable( ssl, ssl->handshake->ecdh_ctx.grp.id ) )
-#else
- if( ssl->handshake->ecdh_ctx.grp.nbits < 163 ||
- ssl->handshake->ecdh_ctx.grp.nbits > 521 )
-#endif
- return( -1 );
-
- SSL_DEBUG_ECP( 3, "ECDH: Qp", &ssl->handshake->ecdh_ctx.Qp );
-
- return( 0 );
-}
-#endif /* POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-
-#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
-static int ssl_parse_server_ecdh_params( ssl_context *ssl,
- unsigned char **p,
- unsigned char *end )
-{
- int ret = POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE;
-
- /*
- * Ephemeral ECDH parameters:
- *
- * struct {
- * ECParameters curve_params;
- * ECPoint public;
- * } ServerECDHParams;
- */
- if( ( ret = ecdh_read_params( &ssl->handshake->ecdh_ctx,
- (const unsigned char **) p, end ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, ( "ecdh_read_params" ), ret );
- return( ret );
- }
-
- if( ssl_check_server_ecdh_params( ssl ) != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message (ECDHE curve)" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- return( ret );
-}
-#endif /* POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
-
-#if defined(POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED)
-static int ssl_parse_server_psk_hint( ssl_context *ssl,
- unsigned char **p,
- unsigned char *end )
-{
- int ret = POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE;
- size_t len;
- ((void) ssl);
-
- /*
- * PSK parameters:
- *
- * opaque psk_identity_hint<0..2^16-1>;
- */
- len = (*p)[0] << 8 | (*p)[1];
- *p += 2;
-
- if( (*p) + len > end )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message (psk_identity_hint length)" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- // TODO: Retrieve PSK identity hint and callback to app
- //
- *p += len;
- ret = 0;
-
- return( ret );
-}
-#endif /* POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-#if defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED)
-/*
- * Generate a pre-master secret and encrypt it with the server's RSA key
- */
-static int ssl_write_encrypted_pms( ssl_context *ssl,
- size_t offset, size_t *olen,
- size_t pms_offset )
-{
- int ret;
- size_t len_bytes = ssl->minor_ver == SSL_MINOR_VERSION_0 ? 0 : 2;
- unsigned char *p = ssl->handshake->premaster + pms_offset;
-
- if( offset + len_bytes > SSL_MAX_CONTENT_LEN )
- {
- SSL_DEBUG_MSG( 1, ( "buffer too small for encrypted pms" ) );
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- }
-
- /*
- * Generate (part of) the pre-master as
- * struct {
- * ProtocolVersion client_version;
- * opaque random[46];
- * } PreMasterSecret;
- */
- p[0] = (unsigned char) ssl->max_major_ver;
- p[1] = (unsigned char) ssl->max_minor_ver;
-
- if( ( ret = ssl->f_rng( ssl->p_rng, p + 2, 46 ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "f_rng", ret );
- return( ret );
- }
-
- ssl->handshake->pmslen = 48;
-
- /*
- * Now write it out, encrypted
- */
- if( ! pk_can_do( &ssl->session_negotiate->peer_cert->pk,
- POLARSSL_PK_RSA ) )
- {
- SSL_DEBUG_MSG( 1, ( "certificate key type mismatch" ) );
- return( POLARSSL_ERR_SSL_PK_TYPE_MISMATCH );
- }
-
- if( ( ret = pk_encrypt( &ssl->session_negotiate->peer_cert->pk,
- p, ssl->handshake->pmslen,
- ssl->out_msg + offset + len_bytes, olen,
- SSL_MAX_CONTENT_LEN - offset - len_bytes,
- ssl->f_rng, ssl->p_rng ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "rsa_pkcs1_encrypt", ret );
- return( ret );
- }
-
-#if defined(POLARSSL_SSL_PROTO_TLS1) || defined(POLARSSL_SSL_PROTO_TLS1_1) || \
- defined(POLARSSL_SSL_PROTO_TLS1_2)
- if( len_bytes == 2 )
- {
- ssl->out_msg[offset+0] = (unsigned char)( *olen >> 8 );
- ssl->out_msg[offset+1] = (unsigned char)( *olen );
- *olen += 2;
- }
-#endif
-
- return( 0 );
-}
-#endif /* POLARSSL_KEY_EXCHANGE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED */
-
-#if defined(POLARSSL_SSL_PROTO_TLS1_2)
-#if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
-static int ssl_parse_signature_algorithm( ssl_context *ssl,
- unsigned char **p,
- unsigned char *end,
- md_type_t *md_alg,
- pk_type_t *pk_alg )
-{
- ((void) ssl);
- *md_alg = POLARSSL_MD_NONE;
- *pk_alg = POLARSSL_PK_NONE;
-
- /* Only in TLS 1.2 */
- if( ssl->minor_ver != SSL_MINOR_VERSION_3 )
- {
- return( 0 );
- }
-
- if( (*p) + 2 > end )
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
-
- /*
- * Get hash algorithm
- */
- if( ( *md_alg = ssl_md_alg_from_hash( (*p)[0] ) ) == POLARSSL_MD_NONE )
- {
- SSL_DEBUG_MSG( 2, ( "Server used unsupported "
- "HashAlgorithm %d", *(p)[0] ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- /*
- * Get signature algorithm
- */
- if( ( *pk_alg = ssl_pk_alg_from_sig( (*p)[1] ) ) == POLARSSL_PK_NONE )
- {
- SSL_DEBUG_MSG( 2, ( "server used unsupported "
- "SignatureAlgorithm %d", (*p)[1] ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- SSL_DEBUG_MSG( 2, ( "Server used SignatureAlgorithm %d", (*p)[1] ) );
- SSL_DEBUG_MSG( 2, ( "Server used HashAlgorithm %d", (*p)[0] ) );
- *p += 2;
-
- return( 0 );
-}
-#endif /* POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
-#endif /* POLARSSL_SSL_PROTO_TLS1_2 */
-
-
-#if defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
-static int ssl_get_ecdh_params_from_cert( ssl_context *ssl )
-{
- int ret;
- const ecp_keypair *peer_key;
-
- if( ! pk_can_do( &ssl->session_negotiate->peer_cert->pk,
- POLARSSL_PK_ECKEY ) )
- {
- SSL_DEBUG_MSG( 1, ( "server key not ECDH capable" ) );
- return( POLARSSL_ERR_SSL_PK_TYPE_MISMATCH );
- }
-
- peer_key = pk_ec( ssl->session_negotiate->peer_cert->pk );
-
- if( ( ret = ecdh_get_params( &ssl->handshake->ecdh_ctx, peer_key,
- POLARSSL_ECDH_THEIRS ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, ( "ecdh_get_params" ), ret );
- return( ret );
- }
-
- if( ssl_check_server_ecdh_params( ssl ) != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server certificate (ECDH curve)" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE );
- }
-
- return( ret );
-}
-#endif /* POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
- POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-
-static int ssl_parse_server_key_exchange( ssl_context *ssl )
-{
- int ret;
- const ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
- unsigned char *p, *end;
-#if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
- size_t sig_len, params_len;
- unsigned char hash[64];
- md_type_t md_alg = POLARSSL_MD_NONE;
- size_t hashlen;
- pk_type_t pk_alg = POLARSSL_PK_NONE;
-#endif
-
- SSL_DEBUG_MSG( 2, ( "=> parse server key exchange" ) );
-
-#if defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA )
- {
- SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) );
- ssl->state++;
- return( 0 );
- }
- ((void) p);
- ((void) end);
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDH_RSA ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDH_ECDSA )
- {
- if( ( ret = ssl_get_ecdh_params_from_cert( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_get_ecdh_params_from_cert", ret );
- return( ret );
- }
-
- SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) );
- ssl->state++;
- return( 0 );
- }
- ((void) p);
- ((void) end);
-#endif /* POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- /*
- * ServerKeyExchange may be skipped with PSK and RSA-PSK when the server
- * doesn't use a psk_identity_hint
- */
- if( ssl->in_msg[0] != SSL_HS_SERVER_KEY_EXCHANGE )
- {
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK )
- {
- ssl->record_read = 1;
- goto exit;
- }
-
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- p = ssl->in_msg + 4;
- end = ssl->in_msg + ssl->in_hslen;
- SSL_DEBUG_BUF( 3, "server key exchange", p, ssl->in_hslen - 4 );
-
-#if defined(POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_PSK )
- {
- if( ssl_parse_server_psk_hint( ssl, &p, end ) != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- } /* FALLTROUGH */
-#endif /* POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-#if defined(POLARSSL_KEY_EXCHANGE_PSK_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK )
- ; /* nothing more to do */
- else
-#endif /* POLARSSL_KEY_EXCHANGE_PSK_ENABLED ||
- POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED */
-#if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_RSA ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_PSK )
- {
- if( ssl_parse_server_dh_params( ssl, &p, end ) != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- }
- else
-#endif /* POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED */
-#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_RSA ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA )
- {
- if( ssl_parse_server_ecdh_params( ssl, &p, end ) != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- }
- else
-#endif /* POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
- {
- SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( POLARSSL_ERR_SSL_INTERNAL_ERROR );
- }
-
-#if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_RSA ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_RSA ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA )
- {
- params_len = p - ( ssl->in_msg + 4 );
-
- /*
- * Handle the digitally-signed structure
- */
-#if defined(POLARSSL_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == SSL_MINOR_VERSION_3 )
- {
- if( ssl_parse_signature_algorithm( ssl, &p, end,
- &md_alg, &pk_alg ) != 0 )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- if( pk_alg != ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info ) )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- }
- else
-#endif /* POLARSSL_SSL_PROTO_TLS1_2 */
-#if defined(POLARSSL_SSL_PROTO_SSL3) || defined(POLARSSL_SSL_PROTO_TLS1) || \
- defined(POLARSSL_SSL_PROTO_TLS1_1)
- if( ssl->minor_ver < SSL_MINOR_VERSION_3 )
- {
- pk_alg = ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
-
- /* Default hash for ECDSA is SHA-1 */
- if( pk_alg == POLARSSL_PK_ECDSA && md_alg == POLARSSL_MD_NONE )
- md_alg = POLARSSL_MD_SHA1;
- }
- else
-#endif
- {
- SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( POLARSSL_ERR_SSL_INTERNAL_ERROR );
- }
-
- /*
- * Read signature
- */
- sig_len = ( p[0] << 8 ) | p[1];
- p += 2;
-
- if( end != p + sig_len )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- SSL_DEBUG_BUF( 3, "signature", p, sig_len );
-
- /*
- * Compute the hash that has been signed
- */
-#if defined(POLARSSL_SSL_PROTO_SSL3) || defined(POLARSSL_SSL_PROTO_TLS1) || \
- defined(POLARSSL_SSL_PROTO_TLS1_1)
- if( md_alg == POLARSSL_MD_NONE )
- {
- md5_context md5;
- sha1_context sha1;
-
- md5_init( &md5 );
- sha1_init( &sha1 );
-
- hashlen = 36;
-
- /*
- * digitally-signed struct {
- * opaque md5_hash[16];
- * opaque sha_hash[20];
- * };
- *
- * md5_hash
- * MD5(ClientHello.random + ServerHello.random
- * + ServerParams);
- * sha_hash
- * SHA(ClientHello.random + ServerHello.random
- * + ServerParams);
- */
- md5_starts( &md5 );
- md5_update( &md5, ssl->handshake->randbytes, 64 );
- md5_update( &md5, ssl->in_msg + 4, params_len );
- md5_finish( &md5, hash );
-
- sha1_starts( &sha1 );
- sha1_update( &sha1, ssl->handshake->randbytes, 64 );
- sha1_update( &sha1, ssl->in_msg + 4, params_len );
- sha1_finish( &sha1, hash + 16 );
-
- md5_free( &md5 );
- sha1_free( &sha1 );
- }
- else
-#endif /* POLARSSL_SSL_PROTO_SSL3 || POLARSSL_SSL_PROTO_TLS1 || \
- POLARSSL_SSL_PROTO_TLS1_1 */
-#if defined(POLARSSL_SSL_PROTO_TLS1) || defined(POLARSSL_SSL_PROTO_TLS1_1) || \
- defined(POLARSSL_SSL_PROTO_TLS1_2)
- if( md_alg != POLARSSL_MD_NONE )
- {
- md_context_t ctx;
-
- md_init( &ctx );
-
- /* Info from md_alg will be used instead */
- hashlen = 0;
-
- /*
- * digitally-signed struct {
- * opaque client_random[32];
- * opaque server_random[32];
- * ServerDHParams params;
- * };
- */
- if( ( ret = md_init_ctx( &ctx,
- md_info_from_type( md_alg ) ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "md_init_ctx", ret );
- return( ret );
- }
-
- md_starts( &ctx );
- md_update( &ctx, ssl->handshake->randbytes, 64 );
- md_update( &ctx, ssl->in_msg + 4, params_len );
- md_finish( &ctx, hash );
- md_free( &ctx );
- }
- else
-#endif /* POLARSSL_SSL_PROTO_TLS1 || POLARSSL_SSL_PROTO_TLS1_1 || \
- POLARSSL_SSL_PROTO_TLS1_2 */
- {
- SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( POLARSSL_ERR_SSL_INTERNAL_ERROR );
- }
-
- SSL_DEBUG_BUF( 3, "parameters hash", hash, hashlen != 0 ? hashlen :
- (unsigned int) ( md_info_from_type( md_alg ) )->size );
-
- /*
- * Verify signature
- */
- if( ! pk_can_do( &ssl->session_negotiate->peer_cert->pk, pk_alg ) )
- {
- SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- return( POLARSSL_ERR_SSL_PK_TYPE_MISMATCH );
- }
-
- if( ( ret = pk_verify( &ssl->session_negotiate->peer_cert->pk,
- md_alg, hash, hashlen, p, sig_len ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "pk_verify", ret );
- return( ret );
- }
- }
-#endif /* POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
-
-exit:
- ssl->state++;
-
- SSL_DEBUG_MSG( 2, ( "<= parse server key exchange" ) );
-
- return( 0 );
-}
-
-#if !defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED) && \
- !defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) && \
- !defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
- !defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
-static int ssl_parse_certificate_request( ssl_context *ssl )
-{
- const ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
-
- SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) );
-
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_PSK )
- {
- SSL_DEBUG_MSG( 2, ( "<= skip parse certificate request" ) );
- ssl->state++;
- return( 0 );
- }
-
- SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( POLARSSL_ERR_SSL_INTERNAL_ERROR );
-}
-#else
-static int ssl_parse_certificate_request( ssl_context *ssl )
-{
- int ret;
- unsigned char *buf, *p;
- size_t n = 0, m = 0;
- size_t cert_type_len = 0, dn_len = 0;
- const ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
-
- SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) );
-
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_PSK )
- {
- SSL_DEBUG_MSG( 2, ( "<= skip parse certificate request" ) );
- ssl->state++;
- return( 0 );
- }
-
- /*
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 4 cert type count
- * 5 .. m-1 cert types
- * m .. m+1 sig alg length (TLS 1.2 only)
- * m+1 .. n-1 SignatureAndHashAlgorithms (TLS 1.2 only)
- * n .. n+1 length of all DNs
- * n+2 .. n+3 length of DN 1
- * n+4 .. ... Distinguished Name #1
- * ... .. ... length of DN 2, etc.
- */
- if( ssl->record_read == 0 )
- {
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
- {
- SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- ssl->record_read = 1;
- }
-
- ssl->client_auth = 0;
- ssl->state++;
-
- if( ssl->in_msg[0] == SSL_HS_CERTIFICATE_REQUEST )
- ssl->client_auth++;
-
- SSL_DEBUG_MSG( 3, ( "got %s certificate request",
- ssl->client_auth ? "a" : "no" ) );
-
- if( ssl->client_auth == 0 )
- goto exit;
-
- ssl->record_read = 0;
-
- // TODO: handshake_failure alert for an anonymous server to request
- // client authentication
-
- buf = ssl->in_msg;
-
- // Retrieve cert types
- //
- cert_type_len = buf[4];
- n = cert_type_len;
-
- if( ssl->in_hslen < 6 + n )
- {
- SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
- }
-
- p = buf + 5;
- while( cert_type_len > 0 )
- {
-#if defined(POLARSSL_RSA_C)
- if( *p == SSL_CERT_TYPE_RSA_SIGN &&
- pk_can_do( ssl_own_key( ssl ), POLARSSL_PK_RSA ) )
- {
- ssl->handshake->cert_type = SSL_CERT_TYPE_RSA_SIGN;
- break;
- }
- else
-#endif
-#if defined(POLARSSL_ECDSA_C)
- if( *p == SSL_CERT_TYPE_ECDSA_SIGN &&
- pk_can_do( ssl_own_key( ssl ), POLARSSL_PK_ECDSA ) )
- {
- ssl->handshake->cert_type = SSL_CERT_TYPE_ECDSA_SIGN;
- break;
- }
- else
-#endif
- {
- ; /* Unsupported cert type, ignore */
- }
-
- cert_type_len--;
- p++;
- }
-
-#if defined(POLARSSL_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == SSL_MINOR_VERSION_3 )
- {
- /* Ignored, see comments about hash in write_certificate_verify */
- // TODO: should check the signature part against our pk_key though
- size_t sig_alg_len = ( ( buf[5 + n] << 8 )
- | ( buf[6 + n] ) );
-
- p = buf + 7 + n;
- m += 2;
- n += sig_alg_len;
-
- if( ssl->in_hslen < 6 + n )
- {
- SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
- }
- }
-#endif /* POLARSSL_SSL_PROTO_TLS1_2 */
-
- /* Ignore certificate_authorities, we only have one cert anyway */
- // TODO: should not send cert if no CA matches
- dn_len = ( ( buf[5 + m + n] << 8 )
- | ( buf[6 + m + n] ) );
-
- n += dn_len;
- if( ssl->in_hslen != 7 + m + n )
- {
- SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
- }
-
-exit:
- SSL_DEBUG_MSG( 2, ( "<= parse certificate request" ) );
-
- return( 0 );
-}
-#endif /* !POLARSSL_KEY_EXCHANGE_RSA_ENABLED &&
- !POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED &&
- !POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED &&
- !POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
-
-static int ssl_parse_server_hello_done( ssl_context *ssl )
-{
- int ret;
-
- SSL_DEBUG_MSG( 2, ( "=> parse server hello done" ) );
-
- if( ssl->record_read == 0 )
- {
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
- }
- ssl->record_read = 0;
-
- if( ssl->in_hslen != 4 ||
- ssl->in_msg[0] != SSL_HS_SERVER_HELLO_DONE )
- {
- SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO_DONE );
- }
-
- ssl->state++;
-
- SSL_DEBUG_MSG( 2, ( "<= parse server hello done" ) );
-
- return( 0 );
-}
-
-static int ssl_write_client_key_exchange( ssl_context *ssl )
-{
- int ret;
- size_t i, n;
- const ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
-
- SSL_DEBUG_MSG( 2, ( "=> write client key exchange" ) );
-
-#if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_RSA )
- {
- /*
- * DHM key exchange -- send G^X mod P
- */
- n = ssl->handshake->dhm_ctx.len;
-
- ssl->out_msg[4] = (unsigned char)( n >> 8 );
- ssl->out_msg[5] = (unsigned char)( n );
- i = 6;
-
- ret = dhm_make_public( &ssl->handshake->dhm_ctx,
- (int) mpi_size( &ssl->handshake->dhm_ctx.P ),
- &ssl->out_msg[i], n,
- ssl->f_rng, ssl->p_rng );
- if( ret != 0 )
- {
- SSL_DEBUG_RET( 1, "dhm_make_public", ret );
- return( ret );
- }
-
- SSL_DEBUG_MPI( 3, "DHM: X ", &ssl->handshake->dhm_ctx.X );
- SSL_DEBUG_MPI( 3, "DHM: GX", &ssl->handshake->dhm_ctx.GX );
-
- ssl->handshake->pmslen = POLARSSL_PREMASTER_SIZE;
-
- if( ( ret = dhm_calc_secret( &ssl->handshake->dhm_ctx,
- ssl->handshake->premaster,
- &ssl->handshake->pmslen,
- ssl->f_rng, ssl->p_rng ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "dhm_calc_secret", ret );
- return( ret );
- }
-
- SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
- }
- else
-#endif /* POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED */
-#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_RSA ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDH_RSA ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDH_ECDSA )
- {
- /*
- * ECDH key exchange -- send client public value
- */
- i = 4;
-
- ret = ecdh_make_public( &ssl->handshake->ecdh_ctx,
- &n,
- &ssl->out_msg[i], 1000,
- ssl->f_rng, ssl->p_rng );
- if( ret != 0 )
- {
- SSL_DEBUG_RET( 1, "ecdh_make_public", ret );
- return( ret );
- }
-
- SSL_DEBUG_ECP( 3, "ECDH: Q", &ssl->handshake->ecdh_ctx.Q );
-
- if( ( ret = ecdh_calc_secret( &ssl->handshake->ecdh_ctx,
- &ssl->handshake->pmslen,
- ssl->handshake->premaster,
- POLARSSL_MPI_MAX_SIZE,
- ssl->f_rng, ssl->p_rng ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ecdh_calc_secret", ret );
- return( ret );
- }
-
- SSL_DEBUG_MPI( 3, "ECDH: z", &ssl->handshake->ecdh_ctx.z );
- }
- else
-#endif /* POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
- POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-#if defined(POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_PSK )
- {
- /*
- * opaque psk_identity<0..2^16-1>;
- */
- if( ssl->psk == NULL || ssl->psk_identity == NULL )
- return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED );
-
- i = 4;
- n = ssl->psk_identity_len;
-
- if( i + 2 + n > SSL_MAX_CONTENT_LEN )
- {
- SSL_DEBUG_MSG( 1, ( "psk identity too long or "
- "SSL buffer too short" ) );
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- }
-
- ssl->out_msg[i++] = (unsigned char)( n >> 8 );
- ssl->out_msg[i++] = (unsigned char)( n );
-
- memcpy( ssl->out_msg + i, ssl->psk_identity, ssl->psk_identity_len );
- i += ssl->psk_identity_len;
-
-#if defined(POLARSSL_KEY_EXCHANGE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK )
- {
- n = 0;
- }
- else
-#endif
-#if defined(POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK )
- {
- if( ( ret = ssl_write_encrypted_pms( ssl, i, &n, 2 ) ) != 0 )
- return( ret );
- }
- else
-#endif
-#if defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_PSK )
- {
- /*
- * ClientDiffieHellmanPublic public (DHM send G^X mod P)
- */
- n = ssl->handshake->dhm_ctx.len;
-
- if( i + 2 + n > SSL_MAX_CONTENT_LEN )
- {
- SSL_DEBUG_MSG( 1, ( "psk identity or DHM size too long"
- " or SSL buffer too short" ) );
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- }
-
- ssl->out_msg[i++] = (unsigned char)( n >> 8 );
- ssl->out_msg[i++] = (unsigned char)( n );
-
- ret = dhm_make_public( &ssl->handshake->dhm_ctx,
- (int) mpi_size( &ssl->handshake->dhm_ctx.P ),
- &ssl->out_msg[i], n,
- ssl->f_rng, ssl->p_rng );
- if( ret != 0 )
- {
- SSL_DEBUG_RET( 1, "dhm_make_public", ret );
- return( ret );
- }
- }
- else
-#endif /* POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED */
-#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_PSK )
- {
- /*
- * ClientECDiffieHellmanPublic public;
- */
- ret = ecdh_make_public( &ssl->handshake->ecdh_ctx, &n,
- &ssl->out_msg[i], SSL_MAX_CONTENT_LEN - i,
- ssl->f_rng, ssl->p_rng );
- if( ret != 0 )
- {
- SSL_DEBUG_RET( 1, "ecdh_make_public", ret );
- return( ret );
- }
-
- SSL_DEBUG_ECP( 3, "ECDH: Q", &ssl->handshake->ecdh_ctx.Q );
- }
- else
-#endif /* POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
- {
- SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( POLARSSL_ERR_SSL_INTERNAL_ERROR );
- }
-
- if( ( ret = ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED */
-#if defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA )
- {
- i = 4;
- if( ( ret = ssl_write_encrypted_pms( ssl, i, &n, 0 ) ) != 0 )
- return( ret );
- }
- else
-#endif /* POLARSSL_KEY_EXCHANGE_RSA_ENABLED */
- {
- ((void) ciphersuite_info);
- SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( POLARSSL_ERR_SSL_INTERNAL_ERROR );
- }
-
- ssl->out_msglen = i + n;
- ssl->out_msgtype = SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = SSL_HS_CLIENT_KEY_EXCHANGE;
-
- ssl->state++;
-
- if( ( ret = ssl_write_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_write_record", ret );
- return( ret );
- }
-
- SSL_DEBUG_MSG( 2, ( "<= write client key exchange" ) );
-
- return( 0 );
-}
-
-#if !defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED) && \
- !defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) && \
- !defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
- !defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
-static int ssl_write_certificate_verify( ssl_context *ssl )
-{
- const ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
- int ret;
-
- SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
-
- if( ( ret = ssl_derive_keys( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_derive_keys", ret );
- return( ret );
- }
-
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_PSK )
- {
- SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-
- SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( POLARSSL_ERR_SSL_INTERNAL_ERROR );
-}
-#else
-static int ssl_write_certificate_verify( ssl_context *ssl )
-{
- int ret = POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE;
- const ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
- size_t n = 0, offset = 0;
- unsigned char hash[48];
- unsigned char *hash_start = hash;
- md_type_t md_alg = POLARSSL_MD_NONE;
- unsigned int hashlen;
-
- SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
-
- if( ( ret = ssl_derive_keys( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_derive_keys", ret );
- return( ret );
- }
-
- if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_PSK ||
- ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_DHE_PSK )
- {
- SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-
- if( ssl->client_auth == 0 || ssl_own_cert( ssl ) == NULL )
- {
- SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-
- if( ssl_own_key( ssl ) == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "got no private key" ) );
- return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED );
- }
-
- /*
- * Make an RSA signature of the handshake digests
- */
- ssl->handshake->calc_verify( ssl, hash );
-
-#if defined(POLARSSL_SSL_PROTO_SSL3) || defined(POLARSSL_SSL_PROTO_TLS1) || \
- defined(POLARSSL_SSL_PROTO_TLS1_1)
- if( ssl->minor_ver != SSL_MINOR_VERSION_3 )
- {
- /*
- * digitally-signed struct {
- * opaque md5_hash[16];
- * opaque sha_hash[20];
- * };
- *
- * md5_hash
- * MD5(handshake_messages);
- *
- * sha_hash
- * SHA(handshake_messages);
- */
- hashlen = 36;
- md_alg = POLARSSL_MD_NONE;
-
- /*
- * For ECDSA, default hash is SHA-1 only
- */
- if( pk_can_do( ssl_own_key( ssl ), POLARSSL_PK_ECDSA ) )
- {
- hash_start += 16;
- hashlen -= 16;
- md_alg = POLARSSL_MD_SHA1;
- }
- }
- else
-#endif /* POLARSSL_SSL_PROTO_SSL3 || POLARSSL_SSL_PROTO_TLS1 || \
- POLARSSL_SSL_PROTO_TLS1_1 */
-#if defined(POLARSSL_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == SSL_MINOR_VERSION_3 )
- {
- /*
- * digitally-signed struct {
- * opaque handshake_messages[handshake_messages_length];
- * };
- *
- * Taking shortcut here. We assume that the server always allows the
- * PRF Hash function and has sent it in the allowed signature
- * algorithms list received in the Certificate Request message.
- *
- * Until we encounter a server that does not, we will take this
- * shortcut.
- *
- * Reason: Otherwise we should have running hashes for SHA512 and SHA224
- * in order to satisfy 'weird' needs from the server side.
- */
- if( ssl->transform_negotiate->ciphersuite_info->mac ==
- POLARSSL_MD_SHA384 )
- {
- md_alg = POLARSSL_MD_SHA384;
- ssl->out_msg[4] = SSL_HASH_SHA384;
- }
- else
- {
- md_alg = POLARSSL_MD_SHA256;
- ssl->out_msg[4] = SSL_HASH_SHA256;
- }
- ssl->out_msg[5] = ssl_sig_from_pk( ssl_own_key( ssl ) );
-
- /* Info from md_alg will be used instead */
- hashlen = 0;
- offset = 2;
- }
- else
-#endif /* POLARSSL_SSL_PROTO_TLS1_2 */
- {
- SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( POLARSSL_ERR_SSL_INTERNAL_ERROR );
- }
-
- if( ( ret = pk_sign( ssl_own_key( ssl ), md_alg, hash_start, hashlen,
- ssl->out_msg + 6 + offset, &n,
- ssl->f_rng, ssl->p_rng ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "pk_sign", ret );
- return( ret );
- }
-
- ssl->out_msg[4 + offset] = (unsigned char)( n >> 8 );
- ssl->out_msg[5 + offset] = (unsigned char)( n );
-
- ssl->out_msglen = 6 + n + offset;
- ssl->out_msgtype = SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = SSL_HS_CERTIFICATE_VERIFY;
-
- ssl->state++;
-
- if( ( ret = ssl_write_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_write_record", ret );
- return( ret );
- }
-
- SSL_DEBUG_MSG( 2, ( "<= write certificate verify" ) );
-
- return( ret );
-}
-#endif /* !POLARSSL_KEY_EXCHANGE_RSA_ENABLED &&
- !POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED &&
- !POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED */
-
-#if defined(POLARSSL_SSL_SESSION_TICKETS)
-static int ssl_parse_new_session_ticket( ssl_context *ssl )
-{
- int ret;
- uint32_t lifetime;
- size_t ticket_len;
- unsigned char *ticket;
-
- SSL_DEBUG_MSG( 2, ( "=> parse new session ticket" ) );
-
- if( ( ret = ssl_read_record( ssl ) ) != 0 )
- {
- SSL_DEBUG_RET( 1, "ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != SSL_MSG_HANDSHAKE )
- {
- SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
- return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- /*
- * struct {
- * uint32 ticket_lifetime_hint;
- * opaque ticket<0..2^16-1>;
- * } NewSessionTicket;
- *
- * 0 . 0 handshake message type
- * 1 . 3 handshake message length
- * 4 . 7 ticket_lifetime_hint
- * 8 . 9 ticket_len (n)
- * 10 . 9+n ticket content
- */
- if( ssl->in_msg[0] != SSL_HS_NEW_SESSION_TICKET ||
- ssl->in_hslen < 10 )
- {
- SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_NEW_SESSION_TICKET );
- }
-
- lifetime = ( ssl->in_msg[4] << 24 ) | ( ssl->in_msg[5] << 16 ) |
- ( ssl->in_msg[6] << 8 ) | ( ssl->in_msg[7] );
-
- ticket_len = ( ssl->in_msg[8] << 8 ) | ( ssl->in_msg[9] );
-
- if( ticket_len + 10 != ssl->in_hslen )
- {
- SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
- return( POLARSSL_ERR_SSL_BAD_HS_NEW_SESSION_TICKET );
- }
-
- SSL_DEBUG_MSG( 3, ( "ticket length: %d", ticket_len ) );
-
- /* We're not waiting for a NewSessionTicket message any more */
- ssl->handshake->new_session_ticket = 0;
-
- /*
- * Zero-length ticket means the server changed his mind and doesn't want
- * to send a ticket after all, so just forget it
- */
- if( ticket_len == 0 )
- return( 0 );
-
- polarssl_zeroize( ssl->session_negotiate->ticket,
- ssl->session_negotiate->ticket_len );
- polarssl_free( ssl->session_negotiate->ticket );
- ssl->session_negotiate->ticket = NULL;
- ssl->session_negotiate->ticket_len = 0;
-
- if( ( ticket = polarssl_malloc( ticket_len ) ) == NULL )
- {
- SSL_DEBUG_MSG( 1, ( "ticket malloc failed" ) );
- return( POLARSSL_ERR_SSL_MALLOC_FAILED );
- }
-
- memcpy( ticket, ssl->in_msg + 10, ticket_len );
-
- ssl->session_negotiate->ticket = ticket;
- ssl->session_negotiate->ticket_len = ticket_len;
- ssl->session_negotiate->ticket_lifetime = lifetime;
-
- /*
- * RFC 5077 section 3.4:
- * "If the client receives a session ticket from the server, then it
- * discards any Session ID that was sent in the ServerHello."
- */
- SSL_DEBUG_MSG( 3, ( "ticket in use, discarding session id" ) );
- ssl->session_negotiate->length = 0;
-
- SSL_DEBUG_MSG( 2, ( "<= parse new session ticket" ) );
-
- return( 0 );
-}
-#endif /* POLARSSL_SSL_SESSION_TICKETS */
-
-/*
- * SSL handshake -- client side -- single step
- */
-int ssl_handshake_client_step( ssl_context *ssl )
-{
- int ret = 0;
-
- if( ssl->state == SSL_HANDSHAKE_OVER )
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
-
- SSL_DEBUG_MSG( 2, ( "client state: %d", ssl->state ) );
-
- if( ( ret = ssl_flush_output( ssl ) ) != 0 )
- return( ret );
-
- switch( ssl->state )
- {
- case SSL_HELLO_REQUEST:
- ssl->state = SSL_CLIENT_HELLO;
- break;
-
- /*
- * ==> ClientHello
- */
- case SSL_CLIENT_HELLO:
- ret = ssl_write_client_hello( ssl );
- break;
-
- /*
- * <== ServerHello
- * Certificate
- * ( ServerKeyExchange )
- * ( CertificateRequest )
- * ServerHelloDone
- */
- case SSL_SERVER_HELLO:
- ret = ssl_parse_server_hello( ssl );
- break;
-
- case SSL_SERVER_CERTIFICATE:
- ret = ssl_parse_certificate( ssl );
- break;
-
- case SSL_SERVER_KEY_EXCHANGE:
- ret = ssl_parse_server_key_exchange( ssl );
- break;
-
- case SSL_CERTIFICATE_REQUEST:
- ret = ssl_parse_certificate_request( ssl );
- break;
-
- case SSL_SERVER_HELLO_DONE:
- ret = ssl_parse_server_hello_done( ssl );
- break;
-
- /*
- * ==> ( Certificate/Alert )
- * ClientKeyExchange
- * ( CertificateVerify )
- * ChangeCipherSpec
- * Finished
- */
- case SSL_CLIENT_CERTIFICATE:
- ret = ssl_write_certificate( ssl );
- break;
-
- case SSL_CLIENT_KEY_EXCHANGE:
- ret = ssl_write_client_key_exchange( ssl );
- break;
-
- case SSL_CERTIFICATE_VERIFY:
- ret = ssl_write_certificate_verify( ssl );
- break;
-
- case SSL_CLIENT_CHANGE_CIPHER_SPEC:
- ret = ssl_write_change_cipher_spec( ssl );
- break;
-
- case SSL_CLIENT_FINISHED:
- ret = ssl_write_finished( ssl );
- break;
-
- /*
- * <== ( NewSessionTicket )
- * ChangeCipherSpec
- * Finished
- */
- case SSL_SERVER_CHANGE_CIPHER_SPEC:
-#if defined(POLARSSL_SSL_SESSION_TICKETS)
- if( ssl->handshake->new_session_ticket != 0 )
- ret = ssl_parse_new_session_ticket( ssl );
- else
-#endif
- ret = ssl_parse_change_cipher_spec( ssl );
- break;
-
- case SSL_SERVER_FINISHED:
- ret = ssl_parse_finished( ssl );
- break;
-
- case SSL_FLUSH_BUFFERS:
- SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
- ssl->state = SSL_HANDSHAKE_WRAPUP;
- break;
-
- case SSL_HANDSHAKE_WRAPUP:
- ssl_handshake_wrapup( ssl );
- break;
-
- default:
- SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
- return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
- }
-
- return( ret );
-}
-#endif /* POLARSSL_SSL_CLI_C */