mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-22 17:05:36 +01:00
Implement parameter validation for RSA module
This commit is contained in:
Hanno Becker
parent
9a46777d66
commit
ddeeed7d1b
195
library/rsa.c
195
library/rsa.c
@ -71,6 +71,12 @@
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#if !defined(MBEDTLS_RSA_ALT)
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/* Parameter validation macros */
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#define RSA_VALIDATE_RET( cond ) \
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MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_RSA_BAD_INPUT_DATA )
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#define RSA_VALIDATE( cond ) \
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MBEDTLS_INTERNAL_VALIDATE( cond )
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#if defined(MBEDTLS_PKCS1_V15)
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/* constant-time buffer comparison */
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static inline int mbedtls_safer_memcmp( const void *a, const void *b, size_t n )
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@ -93,6 +99,7 @@ int mbedtls_rsa_import( mbedtls_rsa_context *ctx,
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const mbedtls_mpi *D, const mbedtls_mpi *E )
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{
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int ret;
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RSA_VALIDATE_RET( ctx != NULL );
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if( ( N != NULL && ( ret = mbedtls_mpi_copy( &ctx->N, N ) ) != 0 ) ||
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( P != NULL && ( ret = mbedtls_mpi_copy( &ctx->P, P ) ) != 0 ) ||
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@ -117,6 +124,7 @@ int mbedtls_rsa_import_raw( mbedtls_rsa_context *ctx,
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unsigned char const *E, size_t E_len )
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{
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int ret = 0;
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RSA_VALIDATE_RET( ctx != NULL );
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if( N != NULL )
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{
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@ -240,12 +248,16 @@ static int rsa_check_context( mbedtls_rsa_context const *ctx, int is_priv,
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int mbedtls_rsa_complete( mbedtls_rsa_context *ctx )
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{
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int ret = 0;
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int have_N, have_P, have_Q, have_D, have_E;
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int n_missing, pq_missing, d_missing, is_pub, is_priv;
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const int have_N = ( mbedtls_mpi_cmp_int( &ctx->N, 0 ) != 0 );
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const int have_P = ( mbedtls_mpi_cmp_int( &ctx->P, 0 ) != 0 );
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const int have_Q = ( mbedtls_mpi_cmp_int( &ctx->Q, 0 ) != 0 );
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const int have_D = ( mbedtls_mpi_cmp_int( &ctx->D, 0 ) != 0 );
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const int have_E = ( mbedtls_mpi_cmp_int( &ctx->E, 0 ) != 0 );
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RSA_VALIDATE_RET( ctx != NULL );
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have_N = ( mbedtls_mpi_cmp_int( &ctx->N, 0 ) != 0 );
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have_P = ( mbedtls_mpi_cmp_int( &ctx->P, 0 ) != 0 );
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have_Q = ( mbedtls_mpi_cmp_int( &ctx->Q, 0 ) != 0 );
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have_D = ( mbedtls_mpi_cmp_int( &ctx->D, 0 ) != 0 );
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have_E = ( mbedtls_mpi_cmp_int( &ctx->E, 0 ) != 0 );
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/*
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* Check whether provided parameters are enough
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@ -257,13 +269,13 @@ int mbedtls_rsa_complete( mbedtls_rsa_context *ctx )
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*
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*/
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const int n_missing = have_P && have_Q && have_D && have_E;
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const int pq_missing = have_N && !have_P && !have_Q && have_D && have_E;
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const int d_missing = have_P && have_Q && !have_D && have_E;
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const int is_pub = have_N && !have_P && !have_Q && !have_D && have_E;
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n_missing = have_P && have_Q && have_D && have_E;
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pq_missing = have_N && !have_P && !have_Q && have_D && have_E;
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d_missing = have_P && have_Q && !have_D && have_E;
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is_pub = have_N && !have_P && !have_Q && !have_D && have_E;
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/* These three alternatives are mutually exclusive */
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const int is_priv = n_missing || pq_missing || d_missing;
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is_priv = n_missing || pq_missing || d_missing;
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if( !is_priv && !is_pub )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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@ -336,9 +348,11 @@ int mbedtls_rsa_export_raw( const mbedtls_rsa_context *ctx,
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unsigned char *E, size_t E_len )
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{
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int ret = 0;
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int is_priv;
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RSA_VALIDATE_RET( ctx != NULL );
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/* Check if key is private or public */
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const int is_priv =
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is_priv =
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mbedtls_mpi_cmp_int( &ctx->N, 0 ) != 0 &&
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mbedtls_mpi_cmp_int( &ctx->P, 0 ) != 0 &&
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mbedtls_mpi_cmp_int( &ctx->Q, 0 ) != 0 &&
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@ -379,9 +393,11 @@ int mbedtls_rsa_export( const mbedtls_rsa_context *ctx,
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mbedtls_mpi *D, mbedtls_mpi *E )
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{
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int ret;
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int is_priv;
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RSA_VALIDATE_RET( ctx != NULL );
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/* Check if key is private or public */
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int is_priv =
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is_priv =
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mbedtls_mpi_cmp_int( &ctx->N, 0 ) != 0 &&
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mbedtls_mpi_cmp_int( &ctx->P, 0 ) != 0 &&
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mbedtls_mpi_cmp_int( &ctx->Q, 0 ) != 0 &&
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@ -421,9 +437,11 @@ int mbedtls_rsa_export_crt( const mbedtls_rsa_context *ctx,
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mbedtls_mpi *DP, mbedtls_mpi *DQ, mbedtls_mpi *QP )
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{
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int ret;
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int is_priv;
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RSA_VALIDATE_RET( ctx != NULL );
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/* Check if key is private or public */
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int is_priv =
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is_priv =
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mbedtls_mpi_cmp_int( &ctx->N, 0 ) != 0 &&
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mbedtls_mpi_cmp_int( &ctx->P, 0 ) != 0 &&
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mbedtls_mpi_cmp_int( &ctx->Q, 0 ) != 0 &&
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@ -459,6 +477,10 @@ void mbedtls_rsa_init( mbedtls_rsa_context *ctx,
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int padding,
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int hash_id )
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{
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RSA_VALIDATE( ctx != NULL );
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RSA_VALIDATE( padding == MBEDTLS_RSA_PKCS_V15 ||
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padding == MBEDTLS_RSA_PKCS_V21 );
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memset( ctx, 0, sizeof( mbedtls_rsa_context ) );
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mbedtls_rsa_set_padding( ctx, padding, hash_id );
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@ -471,8 +493,13 @@ void mbedtls_rsa_init( mbedtls_rsa_context *ctx,
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/*
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* Set padding for an existing RSA context
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*/
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void mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding, int hash_id )
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void mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding,
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int hash_id )
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{
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RSA_VALIDATE( ctx != NULL );
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RSA_VALIDATE( padding == MBEDTLS_RSA_PKCS_V15 ||
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padding == MBEDTLS_RSA_PKCS_V21 );
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ctx->padding = padding;
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ctx->hash_id = hash_id;
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}
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@ -503,11 +530,10 @@ int mbedtls_rsa_gen_key( mbedtls_rsa_context *ctx,
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int ret;
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mbedtls_mpi H, G, L;
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int prime_quality = 0;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( f_rng != NULL );
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if( f_rng == NULL || nbits < 128 || exponent < 3 )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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if( nbits % 2 )
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if( nbits < 128 || exponent < 3 || nbits % 2 != 0 )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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/*
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@ -612,6 +638,8 @@ cleanup:
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*/
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int mbedtls_rsa_check_pubkey( const mbedtls_rsa_context *ctx )
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{
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RSA_VALIDATE_RET( ctx != NULL );
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if( rsa_check_context( ctx, 0 /* public */, 0 /* no blinding */ ) != 0 )
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return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
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@ -635,6 +663,8 @@ int mbedtls_rsa_check_pubkey( const mbedtls_rsa_context *ctx )
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*/
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int mbedtls_rsa_check_privkey( const mbedtls_rsa_context *ctx )
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{
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RSA_VALIDATE_RET( ctx != NULL );
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if( mbedtls_rsa_check_pubkey( ctx ) != 0 ||
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rsa_check_context( ctx, 1 /* private */, 1 /* blinding */ ) != 0 )
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{
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@ -664,6 +694,9 @@ int mbedtls_rsa_check_privkey( const mbedtls_rsa_context *ctx )
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int mbedtls_rsa_check_pub_priv( const mbedtls_rsa_context *pub,
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const mbedtls_rsa_context *prv )
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{
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RSA_VALIDATE_RET( pub != NULL );
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RSA_VALIDATE_RET( prv != NULL );
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if( mbedtls_rsa_check_pubkey( pub ) != 0 ||
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mbedtls_rsa_check_privkey( prv ) != 0 )
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{
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@ -689,6 +722,9 @@ int mbedtls_rsa_public( mbedtls_rsa_context *ctx,
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int ret;
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size_t olen;
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mbedtls_mpi T;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( input != NULL );
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RSA_VALIDATE_RET( output != NULL );
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if( rsa_check_context( ctx, 0 /* public */, 0 /* no blinding */ ) )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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@ -831,6 +867,10 @@ int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
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* checked result; should be the same in the end. */
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mbedtls_mpi I, C;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( input != NULL );
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RSA_VALIDATE_RET( output != NULL );
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if( rsa_check_context( ctx, 1 /* private key checks */,
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f_rng != NULL /* blinding y/n */ ) != 0 )
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{
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@ -1091,6 +1131,13 @@ int mbedtls_rsa_rsaes_oaep_encrypt( mbedtls_rsa_context *ctx,
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const mbedtls_md_info_t *md_info;
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mbedtls_md_context_t md_ctx;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( output != NULL );
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RSA_VALIDATE_RET( ilen == 0 || input != NULL );
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RSA_VALIDATE_RET( label_len == 0 || label != NULL );
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if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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@ -1167,6 +1214,12 @@ int mbedtls_rsa_rsaes_pkcs1_v15_encrypt( mbedtls_rsa_context *ctx,
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int ret;
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unsigned char *p = output;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( output != NULL );
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RSA_VALIDATE_RET( ilen == 0 || input != NULL );
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if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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@ -1229,6 +1282,12 @@ int mbedtls_rsa_pkcs1_encrypt( mbedtls_rsa_context *ctx,
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const unsigned char *input,
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unsigned char *output )
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{
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( output != NULL );
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RSA_VALIDATE_RET( ilen == 0 || input != NULL );
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switch( ctx->padding )
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{
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#if defined(MBEDTLS_PKCS1_V15)
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@ -1271,6 +1330,14 @@ int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx,
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const mbedtls_md_info_t *md_info;
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mbedtls_md_context_t md_ctx;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( output_max_len == 0 || output != NULL );
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RSA_VALIDATE_RET( label_len == 0 || label != NULL );
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RSA_VALIDATE_RET( input != NULL );
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RSA_VALIDATE_RET( olen != NULL );
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/*
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* Parameters sanity checks
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*/
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@ -1490,11 +1557,7 @@ int mbedtls_rsa_rsaes_pkcs1_v15_decrypt( mbedtls_rsa_context *ctx,
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size_t output_max_len )
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{
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int ret;
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size_t ilen = ctx->len;
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size_t i;
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size_t plaintext_max_size = ( output_max_len > ilen - 11 ?
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ilen - 11 :
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output_max_len );
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size_t ilen, i, plaintext_max_size;
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unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
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/* The following variables take sensitive values: their value must
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* not leak into the observable behavior of the function other than
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@ -1512,6 +1575,18 @@ int mbedtls_rsa_rsaes_pkcs1_v15_decrypt( mbedtls_rsa_context *ctx,
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size_t plaintext_size = 0;
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unsigned output_too_large;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( output_max_len == 0 || output != NULL );
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RSA_VALIDATE_RET( input != NULL );
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RSA_VALIDATE_RET( olen != NULL );
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ilen = ctx->len;
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plaintext_max_size = ( output_max_len > ilen - 11 ?
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ilen - 11 :
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output_max_len );
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if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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@ -1647,6 +1722,13 @@ int mbedtls_rsa_pkcs1_decrypt( mbedtls_rsa_context *ctx,
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unsigned char *output,
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size_t output_max_len)
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{
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( output_max_len == 0 || output != NULL );
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RSA_VALIDATE_RET( input != NULL );
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RSA_VALIDATE_RET( olen != NULL );
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switch( ctx->padding )
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{
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#if defined(MBEDTLS_PKCS1_V15)
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@ -1688,6 +1770,13 @@ int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx,
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size_t msb;
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const mbedtls_md_info_t *md_info;
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mbedtls_md_context_t md_ctx;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE &&
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hashlen == 0 ) ||
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hash != NULL );
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RSA_VALIDATE_RET( sig != NULL );
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if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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@ -1935,6 +2024,14 @@ int mbedtls_rsa_rsassa_pkcs1_v15_sign( mbedtls_rsa_context *ctx,
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int ret;
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unsigned char *sig_try = NULL, *verif = NULL;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE &&
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hashlen == 0 ) ||
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hash != NULL );
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RSA_VALIDATE_RET( sig != NULL );
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if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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@ -2004,6 +2101,14 @@ int mbedtls_rsa_pkcs1_sign( mbedtls_rsa_context *ctx,
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const unsigned char *hash,
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unsigned char *sig )
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{
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE &&
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hashlen == 0 ) ||
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hash != NULL );
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RSA_VALIDATE_RET( sig != NULL );
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switch( ctx->padding )
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{
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#if defined(MBEDTLS_PKCS1_V15)
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@ -2050,6 +2155,14 @@ int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
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mbedtls_md_context_t md_ctx;
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unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( sig != NULL );
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RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE &&
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hashlen == 0 ) ||
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hash != NULL );
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if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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@ -2178,7 +2291,16 @@ int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx,
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const unsigned char *hash,
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const unsigned char *sig )
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{
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mbedtls_md_type_t mgf1_hash_id = ( ctx->hash_id != MBEDTLS_MD_NONE )
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mbedtls_md_type_t mgf1_hash_id;
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RSA_VALIDATE_RET( ctx != NULL );
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RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
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mode == MBEDTLS_RSA_PUBLIC );
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RSA_VALIDATE_RET( sig != NULL );
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RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE &&
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hashlen == 0 ) ||
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hash != NULL );
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mgf1_hash_id = ( ctx->hash_id != MBEDTLS_MD_NONE )
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? (mbedtls_md_type_t) ctx->hash_id
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: md_alg;
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@ -2204,9 +2326,19 @@ int mbedtls_rsa_rsassa_pkcs1_v15_verify( mbedtls_rsa_context *ctx,
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const unsigned char *sig )
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{
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int ret = 0;
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const size_t sig_len = ctx->len;
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size_t sig_len;
|
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unsigned char *encoded = NULL, *encoded_expected = NULL;
|
||||
|
||||
RSA_VALIDATE_RET( ctx != NULL );
|
||||
RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
|
||||
mode == MBEDTLS_RSA_PUBLIC );
|
||||
RSA_VALIDATE_RET( sig != NULL );
|
||||
RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE &&
|
||||
hashlen == 0 ) ||
|
||||
hash != NULL );
|
||||
|
||||
sig_len = ctx->len;
|
||||
|
||||
if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
|
||||
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
|
||||
|
||||
@ -2276,6 +2408,14 @@ int mbedtls_rsa_pkcs1_verify( mbedtls_rsa_context *ctx,
|
||||
const unsigned char *hash,
|
||||
const unsigned char *sig )
|
||||
{
|
||||
RSA_VALIDATE_RET( ctx != NULL );
|
||||
RSA_VALIDATE_RET( mode == MBEDTLS_RSA_PRIVATE ||
|
||||
mode == MBEDTLS_RSA_PUBLIC );
|
||||
RSA_VALIDATE_RET( sig != NULL );
|
||||
RSA_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE &&
|
||||
hashlen == 0 ) ||
|
||||
hash != NULL );
|
||||
|
||||
switch( ctx->padding )
|
||||
{
|
||||
#if defined(MBEDTLS_PKCS1_V15)
|
||||
@ -2301,6 +2441,8 @@ int mbedtls_rsa_pkcs1_verify( mbedtls_rsa_context *ctx,
|
||||
int mbedtls_rsa_copy( mbedtls_rsa_context *dst, const mbedtls_rsa_context *src )
|
||||
{
|
||||
int ret;
|
||||
RSA_VALIDATE_RET( dst != NULL );
|
||||
RSA_VALIDATE_RET( src != NULL );
|
||||
|
||||
dst->ver = src->ver;
|
||||
dst->len = src->len;
|
||||
@ -2340,6 +2482,9 @@ cleanup:
|
||||
*/
|
||||
void mbedtls_rsa_free( mbedtls_rsa_context *ctx )
|
||||
{
|
||||
if( ctx == NULL )
|
||||
return;
|
||||
|
||||
mbedtls_mpi_free( &ctx->Vi ); mbedtls_mpi_free( &ctx->Vf );
|
||||
mbedtls_mpi_free( &ctx->RN ); mbedtls_mpi_free( &ctx->D );
|
||||
mbedtls_mpi_free( &ctx->Q ); mbedtls_mpi_free( &ctx->P );
|
||||
|
||||
Loading…
Reference in New Issue
Block a user