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Minor improvements

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This commit is contained in:
Hanno Becker 2017-10-02 13:16:10 +01:00
parent 3f3ae85e11
commit 98838b04af
2 changed files with 38 additions and 22 deletions
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5
include/mbedtls/rsa.h
View File

@ -383,7 +383,7 @@ int mbedtls_rsa_import_raw( mbedtls_rsa_context *ctx,
* must have been imported.
*
* - To setup an RSA private key, enough information must be
* present for the other parameters to be efficiently derivable.
* present for the other parameters to be derivable.
*
* The default implementation supports the following:
* - Derive P, Q from N, D, E
@ -629,7 +629,8 @@ int mbedtls_rsa_check_privkey( const mbedtls_rsa_context *ctx );
*
* \return 0 if successful, or an \c MBEDTLS_ERR_RSA_XXX error code
*/
int mbedtls_rsa_check_pub_priv( const mbedtls_rsa_context *pub, const mbedtls_rsa_context *prv );
int mbedtls_rsa_check_pub_priv( const mbedtls_rsa_context *pub,
const mbedtls_rsa_context *prv );
/**
* \brief Do an RSA public key operation

47
library/rsa.c
View File

@ -310,7 +310,7 @@ int mbedtls_rsa_validate_crt( const mbedtls_mpi *P, const mbedtls_mpi *Q,
mbedtls_mpi_init( &K );
mbedtls_mpi_init( &L );
/* Check that DP - P == 0 mod P - 1 */
/* Check that DP - D == 0 mod P - 1 */
if( DP != NULL )
{
if( P == NULL )
@ -329,7 +329,7 @@ int mbedtls_rsa_validate_crt( const mbedtls_mpi *P, const mbedtls_mpi *Q,
}
}
/* Check that DQ - Q == 0 mod Q - 1 */
/* Check that DQ - D == 0 mod Q - 1 */
if( DQ != NULL )
{
if( Q == NULL )
@ -348,7 +348,7 @@ int mbedtls_rsa_validate_crt( const mbedtls_mpi *P, const mbedtls_mpi *Q,
}
}
/* Check that QP * P - 1 == 0 mod P */
/* Check that QP * Q - 1 == 0 mod P */
if( QP != NULL )
{
if( P == NULL || Q == NULL )
@ -689,7 +689,7 @@ int mbedtls_rsa_complete( mbedtls_rsa_context *ctx,
#endif /* MBEDTLS_RSA_NO_CRT */
/*
* Step 3: Double check
* Step 3: Basic sanity check
*/
if( is_priv )
@ -1009,23 +1009,32 @@ cleanup:
*/
int mbedtls_rsa_check_pubkey( const mbedtls_rsa_context *ctx )
{
if( !ctx->N.p || !ctx->E.p )
if( mbedtls_mpi_cmp_int( &ctx->N, 0 ) == 0 ||
mbedtls_mpi_cmp_int( &ctx->E, 0 ) == 0 )
{
return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
}
if( ctx->len != mbedtls_mpi_size( &ctx->N ) )
return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
if( ( ctx->N.p[0] & 1 ) == 0 ||
( ctx->E.p[0] & 1 ) == 0 )
if( mbedtls_mpi_get_bit( &ctx->N, 0 ) == 0 ||
mbedtls_mpi_get_bit( &ctx->E, 0 ) == 0 )
{
return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
}
if( mbedtls_mpi_bitlen( &ctx->N ) < 128 ||
mbedtls_mpi_bitlen( &ctx->N ) > MBEDTLS_MPI_MAX_BITS )
{
return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
}
if( mbedtls_mpi_bitlen( &ctx->E ) < 2 ||
mbedtls_mpi_cmp_mpi( &ctx->E, &ctx->N ) >= 0 )
{
return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
}
return( 0 );
}
@ -1035,8 +1044,10 @@ int mbedtls_rsa_check_pubkey( const mbedtls_rsa_context *ctx )
*/
int mbedtls_rsa_check_privkey( const mbedtls_rsa_context *ctx )
{
if( mbedtls_rsa_check_pubkey( ctx ) != 0 ||
mbedtls_rsa_validate_params( &ctx->N, &ctx->P, &ctx->Q,
if( mbedtls_rsa_check_pubkey( ctx ) != 0 )
return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
if( mbedtls_rsa_validate_params( &ctx->N, &ctx->P, &ctx->Q,
&ctx->D, &ctx->E, NULL, NULL ) != 0 )
{
return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
@ -1055,7 +1066,8 @@ int mbedtls_rsa_check_privkey( const mbedtls_rsa_context *ctx )
/*
* Check if contexts holding a public and private key match
*/
int mbedtls_rsa_check_pub_priv( const mbedtls_rsa_context *pub, const mbedtls_rsa_context *prv )
int mbedtls_rsa_check_pub_priv( const mbedtls_rsa_context *pub,
const mbedtls_rsa_context *prv )
{
if( mbedtls_rsa_check_pubkey( pub ) != 0 ||
mbedtls_rsa_check_privkey( prv ) != 0 )
@ -2621,8 +2633,9 @@ int mbedtls_rsa_self_test( int verbose )
memcpy( rsa_plaintext, RSA_PT, PT_LEN );
if( mbedtls_rsa_pkcs1_encrypt( &rsa, myrand, NULL, MBEDTLS_RSA_PUBLIC, PT_LEN,
rsa_plaintext, rsa_ciphertext ) != 0 )
if( mbedtls_rsa_pkcs1_encrypt( &rsa, myrand, NULL, MBEDTLS_RSA_PUBLIC,
PT_LEN, rsa_plaintext,
rsa_ciphertext ) != 0 )
{
if( verbose != 0 )
mbedtls_printf( "failed\n" );
@ -2633,8 +2646,8 @@ int mbedtls_rsa_self_test( int verbose )
if( verbose != 0 )
mbedtls_printf( "passed\n PKCS#1 decryption : " );
if( mbedtls_rsa_pkcs1_decrypt( &rsa, myrand, NULL, MBEDTLS_RSA_PRIVATE, &len,
rsa_ciphertext, rsa_decrypted,
if( mbedtls_rsa_pkcs1_decrypt( &rsa, myrand, NULL, MBEDTLS_RSA_PRIVATE,
&len, rsa_ciphertext, rsa_decrypted,
sizeof(rsa_decrypted) ) != 0 )
{
if( verbose != 0 )
@ -2660,7 +2673,8 @@ int mbedtls_rsa_self_test( int verbose )
mbedtls_sha1( rsa_plaintext, PT_LEN, sha1sum );
if( mbedtls_rsa_pkcs1_sign( &rsa, myrand, NULL, MBEDTLS_RSA_PRIVATE, MBEDTLS_MD_SHA1, 0,
if( mbedtls_rsa_pkcs1_sign( &rsa, myrand, NULL,
MBEDTLS_RSA_PRIVATE, MBEDTLS_MD_SHA1, 0,
sha1sum, rsa_ciphertext ) != 0 )
{
if( verbose != 0 )
@ -2672,7 +2686,8 @@ int mbedtls_rsa_self_test( int verbose )
if( verbose != 0 )
mbedtls_printf( "passed\n PKCS#1 sig. verify: " );
if( mbedtls_rsa_pkcs1_verify( &rsa, NULL, NULL, MBEDTLS_RSA_PUBLIC, MBEDTLS_MD_SHA1, 0,
if( mbedtls_rsa_pkcs1_verify( &rsa, NULL, NULL,
MBEDTLS_RSA_PUBLIC, MBEDTLS_MD_SHA1, 0,
sha1sum, rsa_ciphertext ) != 0 )
{
if( verbose != 0 )