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Add client support for ECDSA client auth

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Manuel Pégourié-Gonnard 2013-08-20 16:50:40 +02:00
parent abae74c4a0
commit 76c18a1a77
1 changed files with 56 additions and 18 deletions
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74
library/ssl_cli.c
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@ -1949,7 +1949,7 @@ static int ssl_write_certificate_verify( ssl_context *ssl )
size_t n = 0, offset = 0;
unsigned char hash[48];
md_type_t md_alg = POLARSSL_MD_NONE;
unsigned int hashlen = 0;
unsigned int hashlen;
SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
@ -1968,7 +1968,7 @@ static int ssl_write_certificate_verify( ssl_context *ssl )
return( 0 );
}
if( ssl->rsa_key == NULL )
if( ssl->pk_key == NULL || ssl->pk_key->pk_info == NULL )
{
SSL_DEBUG_MSG( 1, ( "got no private key" ) );
return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED );
@ -1998,6 +1998,7 @@ static int ssl_write_certificate_verify( ssl_context *ssl )
}
else
{
const md_info_t *md_info;
/*
* digitally-signed struct {
* opaque handshake_messages[handshake_messages_length];
@ -2018,37 +2019,74 @@ static int ssl_write_certificate_verify( ssl_context *ssl )
{
md_alg = POLARSSL_MD_SHA384;
ssl->out_msg[4] = SSL_HASH_SHA384;
ssl->out_msg[5] = SSL_SIG_RSA;
}
else
{
md_alg = POLARSSL_MD_SHA256;
ssl->out_msg[4] = SSL_HASH_SHA256;
ssl->out_msg[5] = SSL_SIG_RSA;
}
/* SIG added later */
if( ( md_info = md_info_from_type( md_alg ) ) == NULL )
{
SSL_DEBUG_MSG( 1, ( "should never happen" ) );
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
}
hashlen = md_info->size;
offset = 2;
}
if ( ssl->rsa_key )
#if defined(POLARSSL_RSA_C)
if( ssl->rsa_key != NULL )
{
if( ssl->minor_ver == SSL_MINOR_VERSION_3 )
ssl->out_msg[5] = SSL_SIG_RSA;
if( ( ret = ssl->rsa_sign( ssl->rsa_key, ssl->f_rng, ssl->p_rng,
RSA_PRIVATE, md_alg,
hashlen, hash, ssl->out_msg + 6 + offset ) ) != 0 )
{
SSL_DEBUG_RET( 1, "pkcs1_sign", ret );
return( ret );
}
n = ssl->rsa_key_len ( ssl->rsa_key );
}
else
#endif /* POLARSSL_RSA_C */
#if defined(POLARSSL_ECDSA_C)
if( pk_can_do( ssl->pk_key, POLARSSL_PK_ECDSA ) )
{
ecdsa_context ecdsa;
if( ssl->minor_ver == SSL_MINOR_VERSION_3 )
ssl->out_msg[5] = SSL_SIG_ECDSA;
ecdsa_init( &ecdsa );
ret = ecdsa_from_keypair( &ecdsa, ssl->pk_key->pk_ctx ) ||
ecdsa_write_signature( &ecdsa, hash, hashlen,
ssl->out_msg + 6 + offset, &n,
ssl->f_rng, ssl->p_rng );
ecdsa_free( &ecdsa );
if( ret != 0 )
{
SSL_DEBUG_RET( 1, "ecdsa_sign", ret );
return( ret );
}
}
else
#endif /* POLARSSL_ECDSA_C */
/* should never happen */
return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
ssl->out_msg[4 + offset] = (unsigned char)( n >> 8 );
ssl->out_msg[5 + offset] = (unsigned char)( n );
if( ssl->rsa_key )
{
ret = ssl->rsa_sign( ssl->rsa_key, ssl->f_rng, ssl->p_rng,
RSA_PRIVATE, md_alg,
hashlen, hash, ssl->out_msg + 6 + offset );
}
if (ret != 0)
{
SSL_DEBUG_RET( 1, "pkcs1_sign", ret );
return( ret );
}
ssl->out_msglen = 6 + n + offset;
ssl->out_msgtype = SSL_MSG_HANDSHAKE;
ssl->out_msg[0] = SSL_HS_CERTIFICATE_VERIFY;