Base X509 certificate writing functinality
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
new file mode 100644
index 0000000..59c49b2
--- /dev/null
+++ b/programs/x509/cert_write.c
@@ -0,0 +1,423 @@
+/*
+ * Certificate generation and signing
+ *
+ * Copyright (C) 2006-2013, Brainspark B.V.
+ *
+ * This file is part of PolarSSL (http://www.polarssl.org)
+ * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef _CRT_SECURE_NO_DEPRECATE
+#define _CRT_SECURE_NO_DEPRECATE 1
+#endif
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "polarssl/config.h"
+
+#include "polarssl/error.h"
+#include "polarssl/rsa.h"
+#include "polarssl/x509.h"
+#include "polarssl/base64.h"
+#include "polarssl/x509write.h"
+#include "polarssl/oid.h"
+
+#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_RSA_C) || \
+ !defined(POLARSSL_X509_WRITE_C) || !defined(POLARSSL_FS_IO)
+int main( int argc, char *argv[] )
+{
+ ((void) argc);
+ ((void) argv);
+
+ printf("POLARSSL_BIGNUM_C and/or POLARSSL_RSA_C and/or "
+ "POLARSSL_X509_WRITE_C and/or POLARSSL_FS_IO not defined.\n");
+ return( 0 );
+}
+#else
+
+#define DFL_SUBJECT_KEY "subject.key"
+#define DFL_ISSUER_KEY "ca.key"
+#define DFL_SUBJECT_PWD ""
+#define DFL_ISSUER_PWD ""
+#define DFL_OUTPUT_FILENAME "cert.crt"
+#define DFL_SUBJECT_NAME "CN=Cert,O=PolarSSL,C=NL"
+#define DFL_ISSUER_NAME "CN=CA,O=PolarSSL,C=NL"
+#define DFL_NOT_BEFORE "20010101000000"
+#define DFL_NOT_AFTER "20301231235959"
+#define DFL_SERIAL "1"
+#define DFL_KEY_USAGE 0
+#define DFL_NS_CERT_TYPE 0
+
+/*
+ * global options
+ */
+struct options
+{
+ char *subject_key; /* filename of the subject key file */
+ char *issuer_key; /* filename of the issuer key file */
+ char *subject_pwd; /* password for the subject key file */
+ char *issuer_pwd; /* password for the issuer key file */
+ char *output_file; /* where to store the constructed key file */
+ char *subject_name; /* subject name for certificate */
+ char *issuer_name; /* issuer name for certificate */
+ char *not_before; /* validity period not before */
+ char *not_after; /* validity period not after */
+ char *serial; /* serial number string */
+ unsigned char key_usage; /* key usage flags */
+ unsigned char ns_cert_type; /* NS cert type */
+} opt;
+
+int write_certificate( x509write_cert *crt, char *output_file )
+{
+ int ret;
+ FILE *f;
+ unsigned char output_buf[4096];
+ size_t len = 0;
+
+ memset( output_buf, 0, 4096 );
+ if( ( ret = x509write_crt_pem( crt, output_buf, 4096 ) ) < 0 )
+ return( ret );
+
+ len = strlen( (char *) output_buf );
+
+ if( ( f = fopen( output_file, "w" ) ) == NULL )
+ return( -1 );
+
+ if( fwrite( output_buf, 1, len, f ) != len )
+ return( -1 );
+
+ fclose(f);
+
+ return( 0 );
+}
+
+#define USAGE \
+ "\n usage: cert_write param=<>...\n" \
+ "\n acceptable parameters:\n" \
+ " subject_key=%%s default: subject.key\n" \
+ " subject_pwd=%%s default: (empty)\n" \
+ " issuer_key=%%s default: ca.key\n" \
+ " issuer_pwd=%%s default: (empty)\n" \
+ " output_file=%%s default: cert.crt\n" \
+ " subject_name=%%s default: CN=Cert,O=PolarSSL,C=NL\n" \
+ " issuer_name=%%s default: CN=CA,O=PolarSSL,C=NL\n" \
+ " serial=%%s default: 1\n" \
+ " not_before=%%s default: 20010101000000\n"\
+ " not_after=%%s default: 20301231235959\n"\
+ " key_usage=%%s default: (empty)\n" \
+ " Comma-separated-list of values:\n" \
+ " digital_signature\n" \
+ " non_repudiation\n" \
+ " key_encipherment\n" \
+ " data_encipherment\n" \
+ " key_agreement\n" \
+ " key_certificate_sign\n" \
+ " crl_sign\n" \
+ " ns_cert_type=%%s default: (empty)\n" \
+ " Comma-separated-list of values:\n" \
+ " ssl_client\n" \
+ " ssl_server\n" \
+ " email\n" \
+ " object_signing\n" \
+ " ssl_ca\n" \
+ " email_ca\n" \
+ " object_signing_ca\n" \
+ "\n"
+
+int main( int argc, char *argv[] )
+{
+ int ret = 0;
+ rsa_context issuer_rsa, subject_rsa;
+ char buf[1024];
+ int i, j, n;
+ char *p, *q, *r;
+ x509write_cert crt;
+ mpi serial;
+
+ /*
+ * Set to sane values
+ */
+ x509write_crt_init( &crt );
+ x509write_crt_set_md_alg( &crt, POLARSSL_MD_SHA1 );
+ rsa_init( &issuer_rsa, RSA_PKCS_V15, 0 );
+ rsa_init( &subject_rsa, RSA_PKCS_V15, 0 );
+ mpi_init( &serial );
+ memset( buf, 0, 1024 );
+
+ if( argc == 0 )
+ {
+ usage:
+ printf( USAGE );
+ ret = 1;
+ goto exit;
+ }
+
+ opt.subject_key = DFL_SUBJECT_KEY;
+ opt.issuer_key = DFL_ISSUER_KEY;
+ opt.subject_pwd = DFL_SUBJECT_PWD;
+ opt.issuer_pwd = DFL_ISSUER_PWD;
+ opt.output_file = DFL_OUTPUT_FILENAME;
+ opt.subject_name = DFL_SUBJECT_NAME;
+ opt.issuer_name = DFL_ISSUER_NAME;
+ opt.not_before = DFL_NOT_BEFORE;
+ opt.not_after = DFL_NOT_AFTER;
+ opt.serial = DFL_SERIAL;
+ opt.key_usage = DFL_KEY_USAGE;
+ opt.ns_cert_type = DFL_NS_CERT_TYPE;
+
+ for( i = 1; i < argc; i++ )
+ {
+
+ p = argv[i];
+ if( ( q = strchr( p, '=' ) ) == NULL )
+ goto usage;
+ *q++ = '\0';
+
+ n = strlen( p );
+ for( j = 0; j < n; j++ )
+ {
+ if( argv[i][j] >= 'A' && argv[i][j] <= 'Z' )
+ argv[i][j] |= 0x20;
+ }
+
+ if( strcmp( p, "subject_key" ) == 0 )
+ opt.subject_key = q;
+ else if( strcmp( p, "issuer_key" ) == 0 )
+ opt.issuer_key = q;
+ else if( strcmp( p, "subject_pwd" ) == 0 )
+ opt.subject_pwd = q;
+ else if( strcmp( p, "issuer_pwd" ) == 0 )
+ opt.issuer_pwd = q;
+ else if( strcmp( p, "output_file" ) == 0 )
+ opt.output_file = q;
+ else if( strcmp( p, "subject_name" ) == 0 )
+ {
+ opt.subject_name = q;
+ }
+ else if( strcmp( p, "issuer_name" ) == 0 )
+ {
+ opt.issuer_name = q;
+ }
+ else if( strcmp( p, "not_before" ) == 0 )
+ {
+ opt.not_before = q;
+ }
+ else if( strcmp( p, "not_after" ) == 0 )
+ {
+ opt.not_after = q;
+ }
+ else if( strcmp( p, "serial" ) == 0 )
+ {
+ opt.serial = q;
+ }
+ else if( strcmp( p, "key_usage" ) == 0 )
+ {
+ while( q != NULL )
+ {
+ if( ( r = strchr( q, ',' ) ) != NULL )
+ *r++ = '\0';
+
+ if( strcmp( q, "digital_signature" ) == 0 )
+ opt.key_usage |= KU_DIGITAL_SIGNATURE;
+ else if( strcmp( q, "non_repudiation" ) == 0 )
+ opt.key_usage |= KU_NON_REPUDIATION;
+ else if( strcmp( q, "key_encipherment" ) == 0 )
+ opt.key_usage |= KU_KEY_ENCIPHERMENT;
+ else if( strcmp( q, "data_encipherment" ) == 0 )
+ opt.key_usage |= KU_DATA_ENCIPHERMENT;
+ else if( strcmp( q, "key_agreement" ) == 0 )
+ opt.key_usage |= KU_KEY_AGREEMENT;
+ else if( strcmp( q, "key_cert_sign" ) == 0 )
+ opt.key_usage |= KU_KEY_CERT_SIGN;
+ else if( strcmp( q, "crl_sign" ) == 0 )
+ opt.key_usage |= KU_CRL_SIGN;
+ else
+ goto usage;
+
+ q = r;
+ }
+ }
+ else if( strcmp( p, "ns_cert_type" ) == 0 )
+ {
+ while( q != NULL )
+ {
+ if( ( r = strchr( q, ',' ) ) != NULL )
+ *r++ = '\0';
+
+ if( strcmp( q, "ssl_client" ) == 0 )
+ opt.ns_cert_type |= NS_CERT_TYPE_SSL_CLIENT;
+ else if( strcmp( q, "ssl_server" ) == 0 )
+ opt.ns_cert_type |= NS_CERT_TYPE_SSL_SERVER;
+ else if( strcmp( q, "email" ) == 0 )
+ opt.ns_cert_type |= NS_CERT_TYPE_EMAIL;
+ else if( strcmp( q, "object_signing" ) == 0 )
+ opt.ns_cert_type |= NS_CERT_TYPE_OBJECT_SIGNING;
+ else if( strcmp( q, "ssl_ca" ) == 0 )
+ opt.ns_cert_type |= NS_CERT_TYPE_SSL_CA;
+ else if( strcmp( q, "email_ca" ) == 0 )
+ opt.ns_cert_type |= NS_CERT_TYPE_EMAIL_CA;
+ else if( strcmp( q, "object_signing_ca" ) == 0 )
+ opt.ns_cert_type |= NS_CERT_TYPE_OBJECT_SIGNING_CA;
+ else
+ goto usage;
+
+ q = r;
+ }
+ }
+ else
+ goto usage;
+ }
+
+ // Parse serial to MPI
+ //
+ if( ( ret = mpi_read_string( &serial, 10, opt.serial ) ) != 0 )
+ {
+#ifdef POLARSSL_ERROR_C
+ error_strerror( ret, buf, 1024 );
+#endif
+ printf( " failed\n ! mpi_read_string returned -0x%02x - %s\n\n", -ret, buf );
+ goto exit;
+ }
+
+/*
+ if( opt.key_usage )
+ x509write_csr_set_key_usage( &req, opt.key_usage );
+
+ if( opt.ns_cert_type )
+ x509write_csr_set_ns_cert_type( &req, opt.ns_cert_type );
+*/
+ /*
+ * 1.0. Check the names for validity
+ */
+ if( ( ret = x509write_crt_set_subject_name( &crt, opt.subject_name ) ) != 0 )
+ {
+#ifdef POLARSSL_ERROR_C
+ error_strerror( ret, buf, 1024 );
+#endif
+ printf( " failed\n ! x509write_crt_set_subject_name returned -0x%02x - %s\n\n", -ret, buf );
+ goto exit;
+ }
+
+ if( ( ret = x509write_crt_set_issuer_name( &crt, opt.issuer_name ) ) != 0 )
+ {
+#ifdef POLARSSL_ERROR_C
+ error_strerror( ret, buf, 1024 );
+#endif
+ printf( " failed\n ! x509write_crt_set_issuer_name returned -0x%02x - %s\n\n", -ret, buf );
+ goto exit;
+ }
+
+ /*
+ * 1.1. Load the keys
+ */
+ printf( "\n . Loading the subject key ..." );
+ fflush( stdout );
+
+ ret = x509parse_keyfile_rsa( &subject_rsa, opt.subject_key, opt.subject_pwd );
+
+ if( ret != 0 )
+ {
+#ifdef POLARSSL_ERROR_C
+ error_strerror( ret, buf, 1024 );
+#endif
+ printf( " failed\n ! x509parse_keyfile_rsa returned -0x%02x - %s\n\n", -ret, buf );
+ goto exit;
+ }
+
+ x509write_crt_set_subject_key( &crt, &subject_rsa );
+
+ printf( " ok\n" );
+
+ printf( " . Loading the issuer key ..." );
+ fflush( stdout );
+
+ ret = x509parse_keyfile_rsa( &issuer_rsa, opt.issuer_key, opt.issuer_pwd );
+
+ if( ret != 0 )
+ {
+#ifdef POLARSSL_ERROR_C
+ error_strerror( ret, buf, 1024 );
+#endif
+ printf( " failed\n ! x509parse_keyfile_rsa returned -x%02x - %s\n\n", -ret, buf );
+ goto exit;
+ }
+
+ x509write_crt_set_issuer_key( &crt, &issuer_rsa );
+
+ printf( " ok\n" );
+
+ printf( " . Setting certificate values ..." );
+ fflush( stdout );
+
+ ret = x509write_crt_set_serial( &crt, &serial );
+ if( ret != 0 )
+ {
+#ifdef POLARSSL_ERROR_C
+ error_strerror( ret, buf, 1024 );
+#endif
+ printf( " failed\n ! x509write_crt_set_serial returned -0x%02x - %s\n\n", -ret, buf );
+ goto exit;
+ }
+
+ ret = x509write_crt_set_validity( &crt, opt.not_before, opt.not_after );
+ if( ret != 0 )
+ {
+#ifdef POLARSSL_ERROR_C
+ error_strerror( ret, buf, 1024 );
+#endif
+ printf( " failed\n ! x509write_crt_set_validity returned -0x%02x - %s\n\n", -ret, buf );
+ goto exit;
+ }
+
+ printf( " ok\n" );
+
+ /*
+ * 1.2. Writing the request
+ */
+ printf( " . Writing the certificate..." );
+ fflush( stdout );
+
+ if( ( ret = write_certificate( &crt, opt.output_file ) ) != 0 )
+ {
+#ifdef POLARSSL_ERROR_C
+ error_strerror( ret, buf, 1024 );
+#endif
+ printf( " failed\n ! write_certifcate -0x%02x - %s\n\n", -ret, buf );
+ goto exit;
+ }
+
+ printf( " ok\n" );
+
+exit:
+ x509write_crt_free( &crt );
+ rsa_free( &subject_rsa );
+ rsa_free( &issuer_rsa );
+ mpi_free( &serial );
+
+#if defined(_WIN32)
+ printf( " + Press Enter to exit this program.\n" );
+ fflush( stdout ); getchar();
+#endif
+
+ return( ret );
+}
+#endif /* POLARSSL_BIGNUM_C && POLARSSL_RSA_C &&
+ POLARSSet_serial_X509_WRITE_C && POLARSSL_FS_IO */