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Adapt pk_wrap.c to new RSA interface

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This commit replaces direct manipulation of RSA context structure fields by
calls to the extended RSA interface in pk_wrap.c.
This commit is contained in:
Hanno Becker 2017-08-22 13:55:00 +01:00
parent 3a701161ff
commit 6a1e7e5f4c
1 changed files with 19 additions and 11 deletions
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30
library/pk_wrap.c
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@ -68,7 +68,8 @@ static int rsa_can_do( mbedtls_pk_type_t type )
static size_t rsa_get_bitlen( const void *ctx ) static size_t rsa_get_bitlen( const void *ctx )
{ {
return( 8 * ((const mbedtls_rsa_context *) ctx)->len ); const mbedtls_rsa_context * rsa = (const mbedtls_rsa_context *) ctx;
return( 8 * mbedtls_rsa_get_len( rsa ) );
} }
static int rsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg, static int rsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
@ -76,21 +77,23 @@ static int rsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
const unsigned char *sig, size_t sig_len ) const unsigned char *sig, size_t sig_len )
{ {
int ret; int ret;
mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
size_t rsa_len = mbedtls_rsa_get_len( rsa );
#if defined(MBEDTLS_HAVE_INT64) #if defined(MBEDTLS_HAVE_INT64)
if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len ) if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
#endif /* MBEDTLS_HAVE_INT64 */ #endif /* MBEDTLS_HAVE_INT64 */
if( sig_len < ((mbedtls_rsa_context *) ctx)->len ) if( sig_len < rsa_len )
return( MBEDTLS_ERR_RSA_VERIFY_FAILED ); return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
if( ( ret = mbedtls_rsa_pkcs1_verify( (mbedtls_rsa_context *) ctx, NULL, NULL, if( ( ret = mbedtls_rsa_pkcs1_verify( rsa, NULL, NULL,
MBEDTLS_RSA_PUBLIC, md_alg, MBEDTLS_RSA_PUBLIC, md_alg,
(unsigned int) hash_len, hash, sig ) ) != 0 ) (unsigned int) hash_len, hash, sig ) ) != 0 )
return( ret ); return( ret );
if( sig_len > ((mbedtls_rsa_context *) ctx)->len ) if( sig_len > rsa_len )
return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH ); return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
return( 0 ); return( 0 );
@ -101,14 +104,16 @@ static int rsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
unsigned char *sig, size_t *sig_len, unsigned char *sig, size_t *sig_len,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{ {
mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
#if defined(MBEDTLS_HAVE_INT64) #if defined(MBEDTLS_HAVE_INT64)
if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len ) if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
#endif /* MBEDTLS_HAVE_INT64 */ #endif /* MBEDTLS_HAVE_INT64 */
*sig_len = ((mbedtls_rsa_context *) ctx)->len; *sig_len = mbedtls_rsa_get_len( rsa );
return( mbedtls_rsa_pkcs1_sign( (mbedtls_rsa_context *) ctx, f_rng, p_rng, MBEDTLS_RSA_PRIVATE, return( mbedtls_rsa_pkcs1_sign( rsa, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
md_alg, (unsigned int) hash_len, hash, sig ) ); md_alg, (unsigned int) hash_len, hash, sig ) );
} }
@ -117,10 +122,12 @@ static int rsa_decrypt_wrap( void *ctx,
unsigned char *output, size_t *olen, size_t osize, unsigned char *output, size_t *olen, size_t osize,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{ {
if( ilen != ((mbedtls_rsa_context *) ctx)->len ) mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
if( ilen != mbedtls_rsa_get_len( rsa ) )
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
return( mbedtls_rsa_pkcs1_decrypt( (mbedtls_rsa_context *) ctx, f_rng, p_rng, return( mbedtls_rsa_pkcs1_decrypt( rsa, f_rng, p_rng,
MBEDTLS_RSA_PRIVATE, olen, input, output, osize ) ); MBEDTLS_RSA_PRIVATE, olen, input, output, osize ) );
} }
@ -129,13 +136,14 @@ static int rsa_encrypt_wrap( void *ctx,
unsigned char *output, size_t *olen, size_t osize, unsigned char *output, size_t *olen, size_t osize,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{ {
*olen = ((mbedtls_rsa_context *) ctx)->len; mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
*olen = mbedtls_rsa_get_len( rsa );
if( *olen > osize ) if( *olen > osize )
return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE ); return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
return( mbedtls_rsa_pkcs1_encrypt( (mbedtls_rsa_context *) ctx, return( mbedtls_rsa_pkcs1_encrypt( rsa, f_rng, p_rng, MBEDTLS_RSA_PUBLIC,
f_rng, p_rng, MBEDTLS_RSA_PUBLIC, ilen, input, output ) ); ilen, input, output ) );
} }
static int rsa_check_pair_wrap( const void *pub, const void *prv ) static int rsa_check_pair_wrap( const void *pub, const void *prv )