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Add RNG params to private key parsing

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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>
This commit is contained in:
Manuel Pégourié-Gonnard
2021-06-15 11:29:26 +02:00
parent 39be1410fd
commit 84dea01f36
25 changed files with 175 additions and 121 deletions
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40
programs/ssl/dtls_server.c
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@ -79,7 +79,9 @@ int main( void )
#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 @@ int main( void )
#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 @@ int main( void )
}
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 @@ int main( void )
printf( " ok\n" );
/*
* 2. Setup the "listening" UDP socket
* 3. Setup the "listening" UDP socket
*/
printf( " . Bind on udp/*/4433 ..." );
fflush( stdout );
@ -188,22 +206,6 @@ int main( void )
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
*/