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x509: use the PSA API to perform hashing operations

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So far limited only to certificate verification withour CRL and CSR generation.
This commit is contained in:
Andrzej Kurek 2018-10-31 06:18:39 -04:00
parent e10f191543
commit d4a6553191
2 changed files with 59 additions and 7 deletions
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36
library/x509_crt.c
View file

@ -49,6 +49,11 @@
#include "mbedtls/pem.h"
#endif
#if defined(MBEDTLS_USE_PSA_CRYPTO)
#include "psa/crypto.h"
#include "mbedtls/psa_util.h"
#endif
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
@ -1892,16 +1897,37 @@ static int x509_crt_check_signature( const mbedtls_x509_crt *child,
mbedtls_x509_crt *parent,
mbedtls_x509_crt_restart_ctx *rs_ctx )
{
const mbedtls_md_info_t *md_info;
unsigned char hash[MBEDTLS_MD_MAX_SIZE];
size_t hash_len;
#if !defined(MBEDTLS_USE_PSA_CRYPTO)
const mbedtls_md_info_t *md_info;
md_info = mbedtls_md_info_from_type( child->sig_md );
hash_len = mbedtls_md_get_size( md_info );
/* Note: hash errors can happen only after an internal error */
if( mbedtls_md( md_info, child->tbs.p, child->tbs.len, hash ) != 0 )
return( -1 );
#else
psa_hash_operation_t hash_operation;
psa_algorithm_t hash_alg = mbedtls_psa_translate_md( child->sig_md );
if( psa_hash_setup( &hash_operation, hash_alg ) != PSA_SUCCESS )
return( -1 );
if( psa_hash_update( &hash_operation, child->tbs.p, child->tbs.len )
!= PSA_SUCCESS )
{
/* Note: this can't happen except after an internal error */
psa_hash_abort( &hash_operation );
return( -1 );
}
if( psa_hash_finish( &hash_operation, hash, sizeof( hash ), &hash_len )
!= PSA_SUCCESS )
{
psa_hash_abort( &hash_operation );
return( -1 );
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
/* Skip expensive computation on obvious mismatch */
if( ! mbedtls_pk_can_do( &parent->pk, child->sig_pk ) )
return( -1 );
@ -1910,7 +1936,7 @@ static int x509_crt_check_signature( const mbedtls_x509_crt *child,
if( rs_ctx != NULL && child->sig_pk == MBEDTLS_PK_ECDSA )
{
return( mbedtls_pk_verify_restartable( &parent->pk,
child->sig_md, hash, mbedtls_md_get_size( md_info ),
child->sig_md, hash, hash_len,
child->sig.p, child->sig.len, &rs_ctx->pk ) );
}
#else
@ -1918,7 +1944,7 @@ static int x509_crt_check_signature( const mbedtls_x509_crt *child,
#endif
return( mbedtls_pk_verify_ext( child->sig_pk, child->sig_opts, &parent->pk,
child->sig_md, hash, mbedtls_md_get_size( md_info ),
child->sig_md, hash, hash_len,
child->sig.p, child->sig.len ) );
}

30
library/x509write_csr.c
View file

@ -37,6 +37,11 @@
#include "mbedtls/asn1write.h"
#include "mbedtls/platform_util.h"
#if defined(MBEDTLS_USE_PSA_CRYPTO)
#include "psa/crypto.h"
#include "mbedtls/psa_util.h"
#endif
#include <string.h>
#include <stdlib.h>
@ -136,7 +141,11 @@ int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf, s
size_t pub_len = 0, sig_and_oid_len = 0, sig_len;
size_t len = 0;
mbedtls_pk_type_t pk_alg;
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_hash_operation_t hash_operation;
size_t hash_len;
psa_algorithm_t hash_alg = mbedtls_psa_translate_md( ctx->md_alg );
#endif /* MBEDTLS_USE_PSA_CRYPTO */
/*
* Prepare data to be signed in tmp_buf
*/
@ -187,9 +196,26 @@ int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf, s
/*
* Prepare signature
* Note: hash errors can happen only after an internal error
*/
mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
#if defined(MBEDTLS_USE_PSA_CRYPTO)
if( psa_hash_setup( &hash_operation, hash_alg ) != PSA_SUCCESS )
return( MBEDTLS_ERR_X509_FATAL_ERROR );
if( psa_hash_update( &hash_operation, c, len) != PSA_SUCCESS )
{
psa_hash_abort( &hash_operation );
return( MBEDTLS_ERR_X509_FATAL_ERROR );
}
if( psa_hash_finish( &hash_operation, hash, sizeof( hash ), &hash_len )
!= PSA_SUCCESS )
{
psa_hash_abort( &hash_operation );
return( MBEDTLS_ERR_X509_FATAL_ERROR );
}
#else /* MBEDTLS_USE_PSA_CRYPTO */
mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
#endif
if( ( ret = mbedtls_pk_sign( ctx->key, ctx->md_alg, hash, 0, sig, &sig_len,
f_rng, p_rng ) ) != 0 )
{