Add RNG params to private key parsing
This is necessary for the case where the public part of an EC keypair
needs to be computed from the private part - either because it was not
included (it's an optional component) or because it was compressed (a
format we can't parse).
This changes the API of two public functions: mbedtls_pk_parse_key() and
mbedtls_pk_parse_keyfile().
Tests and programs have been adapted. Some programs use a non-secure RNG
(from the test library) just to get things to compile and run; in a
future commit this should be improved in order to demonstrate best
practice.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/programs/ssl/dtls_server.c b/programs/ssl/dtls_server.c
index de47aab..857671f 100644
--- a/programs/ssl/dtls_server.c
+++ b/programs/ssl/dtls_server.c
@@ -79,7 +79,9 @@
#include "mbedtls/error.h"
#include "mbedtls/debug.h"
#include "mbedtls/timing.h"
+
#include "test/certs.h"
+#include "test/random.h"
#if defined(MBEDTLS_SSL_CACHE_C)
#include "mbedtls/ssl_cache.h"
@@ -138,7 +140,23 @@
#endif
/*
- * 1. Load the certificates and private RSA key
+ * 1. Seed the RNG
+ */
+ printf( " . Seeding the random number generator..." );
+ fflush( stdout );
+
+ if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
+ (const unsigned char *) pers,
+ strlen( pers ) ) ) != 0 )
+ {
+ printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
+ goto exit;
+ }
+
+ printf( " ok\n" );
+
+ /*
+ * 2. Load the certificates and private RSA key
*/
printf( "\n . Loading the server cert. and key..." );
fflush( stdout );
@@ -165,7 +183,7 @@
}
ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key,
- mbedtls_test_srv_key_len, NULL, 0 );
+ mbedtls_test_srv_key_len, NULL, 0, mbedtls_ctr_drbg_random, &ctr_drbg );
if( ret != 0 )
{
printf( " failed\n ! mbedtls_pk_parse_key returned %d\n\n", ret );
@@ -175,7 +193,7 @@
printf( " ok\n" );
/*
- * 2. Setup the "listening" UDP socket
+ * 3. Setup the "listening" UDP socket
*/
printf( " . Bind on udp/*/4433 ..." );
fflush( stdout );
@@ -189,22 +207,6 @@
printf( " ok\n" );
/*
- * 3. Seed the RNG
- */
- printf( " . Seeding the random number generator..." );
- fflush( stdout );
-
- if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
- (const unsigned char *) pers,
- strlen( pers ) ) ) != 0 )
- {
- printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
- goto exit;
- }
-
- printf( " ok\n" );
-
- /*
* 4. Setup stuff
*/
printf( " . Setting up the DTLS data..." );