mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-23 13:25:43 +01:00
b6d5693be2
The function `pk_hashlen_helper` exists to ensure a valid hash_len is used in pk_verify and pk_sign functions. This function has been used to adjust to the corrsponding hash_len if the user passes in 0 for the hash_len argument based on the md algorithm given. If the user does not pass in 0 as the hash_len, then it is not adjusted. This is problematic if the user gives a hash_len and hash buffer that is less than the associated length of the md algorithm. This error would go unchecked and eventually lead to buffer overread when given to specific pk_sign/verify functions, since they both ignore the hash_len argument if md_alg is not MBEDTLS_MD_NONE. This commit, adds a conditional to `pk_hashlen_helper` so that an error is thrown if the user specifies a hash_length (not 0) and it is not equal to the expected for the associated message digest algorithm. This aligns better with the api documentation where it states "If hash_len is 0, then the length associated with md_alg is used instead, or an error returned if it is invalid" Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
643 lines
18 KiB
C
643 lines
18 KiB
C
/*
|
|
* Public Key abstraction layer
|
|
*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
* not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "common.h"
|
|
|
|
#if defined(MBEDTLS_PK_C)
|
|
#include "mbedtls/pk.h"
|
|
#include "mbedtls/pk_internal.h"
|
|
|
|
#include "mbedtls/platform_util.h"
|
|
#include "mbedtls/error.h"
|
|
|
|
#if defined(MBEDTLS_RSA_C)
|
|
#include "mbedtls/rsa.h"
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_C)
|
|
#include "mbedtls/ecp.h"
|
|
#endif
|
|
#if defined(MBEDTLS_ECDSA_C)
|
|
#include "mbedtls/ecdsa.h"
|
|
#endif
|
|
|
|
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
|
#include "mbedtls/psa_util.h"
|
|
#endif
|
|
|
|
#include <limits.h>
|
|
#include <stdint.h>
|
|
|
|
/* Parameter validation macros based on platform_util.h */
|
|
#define PK_VALIDATE_RET( cond ) \
|
|
MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_PK_BAD_INPUT_DATA )
|
|
#define PK_VALIDATE( cond ) \
|
|
MBEDTLS_INTERNAL_VALIDATE( cond )
|
|
|
|
/*
|
|
* Initialise a mbedtls_pk_context
|
|
*/
|
|
void mbedtls_pk_init( mbedtls_pk_context *ctx )
|
|
{
|
|
PK_VALIDATE( ctx != NULL );
|
|
|
|
ctx->pk_info = NULL;
|
|
ctx->pk_ctx = NULL;
|
|
}
|
|
|
|
/*
|
|
* Free (the components of) a mbedtls_pk_context
|
|
*/
|
|
void mbedtls_pk_free( mbedtls_pk_context *ctx )
|
|
{
|
|
if( ctx == NULL )
|
|
return;
|
|
|
|
if ( ctx->pk_info != NULL )
|
|
ctx->pk_info->ctx_free_func( ctx->pk_ctx );
|
|
|
|
mbedtls_platform_zeroize( ctx, sizeof( mbedtls_pk_context ) );
|
|
}
|
|
|
|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
/*
|
|
* Initialize a restart context
|
|
*/
|
|
void mbedtls_pk_restart_init( mbedtls_pk_restart_ctx *ctx )
|
|
{
|
|
PK_VALIDATE( ctx != NULL );
|
|
ctx->pk_info = NULL;
|
|
ctx->rs_ctx = NULL;
|
|
}
|
|
|
|
/*
|
|
* Free the components of a restart context
|
|
*/
|
|
void mbedtls_pk_restart_free( mbedtls_pk_restart_ctx *ctx )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL ||
|
|
ctx->pk_info->rs_free_func == NULL )
|
|
{
|
|
return;
|
|
}
|
|
|
|
ctx->pk_info->rs_free_func( ctx->rs_ctx );
|
|
|
|
ctx->pk_info = NULL;
|
|
ctx->rs_ctx = NULL;
|
|
}
|
|
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
|
|
/*
|
|
* Get pk_info structure from type
|
|
*/
|
|
const mbedtls_pk_info_t * mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type )
|
|
{
|
|
switch( pk_type ) {
|
|
#if defined(MBEDTLS_RSA_C)
|
|
case MBEDTLS_PK_RSA:
|
|
return( &mbedtls_rsa_info );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_C)
|
|
case MBEDTLS_PK_ECKEY:
|
|
return( &mbedtls_eckey_info );
|
|
case MBEDTLS_PK_ECKEY_DH:
|
|
return( &mbedtls_eckeydh_info );
|
|
#endif
|
|
#if defined(MBEDTLS_ECDSA_C)
|
|
case MBEDTLS_PK_ECDSA:
|
|
return( &mbedtls_ecdsa_info );
|
|
#endif
|
|
/* MBEDTLS_PK_RSA_ALT omitted on purpose */
|
|
default:
|
|
return( NULL );
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialise context
|
|
*/
|
|
int mbedtls_pk_setup( mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
if( info == NULL || ctx->pk_info != NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
|
|
return( MBEDTLS_ERR_PK_ALLOC_FAILED );
|
|
|
|
ctx->pk_info = info;
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
|
/*
|
|
* Initialise a PSA-wrapping context
|
|
*/
|
|
int mbedtls_pk_setup_opaque( mbedtls_pk_context *ctx,
|
|
const psa_key_id_t key )
|
|
{
|
|
const mbedtls_pk_info_t * const info = &mbedtls_pk_opaque_info;
|
|
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
|
|
psa_key_id_t *pk_ctx;
|
|
psa_key_type_t type;
|
|
|
|
if( ctx == NULL || ctx->pk_info != NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( PSA_SUCCESS != psa_get_key_attributes( key, &attributes ) )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
type = psa_get_key_type( &attributes );
|
|
psa_reset_key_attributes( &attributes );
|
|
|
|
/* Current implementation of can_do() relies on this. */
|
|
if( ! PSA_KEY_TYPE_IS_ECC_KEY_PAIR( type ) )
|
|
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE) ;
|
|
|
|
if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
|
|
return( MBEDTLS_ERR_PK_ALLOC_FAILED );
|
|
|
|
ctx->pk_info = info;
|
|
|
|
pk_ctx = (psa_key_id_t *) ctx->pk_ctx;
|
|
*pk_ctx = key;
|
|
|
|
return( 0 );
|
|
}
|
|
#endif /* MBEDTLS_USE_PSA_CRYPTO */
|
|
|
|
#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
|
|
/*
|
|
* Initialize an RSA-alt context
|
|
*/
|
|
int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key,
|
|
mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
|
|
mbedtls_pk_rsa_alt_sign_func sign_func,
|
|
mbedtls_pk_rsa_alt_key_len_func key_len_func )
|
|
{
|
|
mbedtls_rsa_alt_context *rsa_alt;
|
|
const mbedtls_pk_info_t *info = &mbedtls_rsa_alt_info;
|
|
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
if( ctx->pk_info != NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
|
|
return( MBEDTLS_ERR_PK_ALLOC_FAILED );
|
|
|
|
ctx->pk_info = info;
|
|
|
|
rsa_alt = (mbedtls_rsa_alt_context *) ctx->pk_ctx;
|
|
|
|
rsa_alt->key = key;
|
|
rsa_alt->decrypt_func = decrypt_func;
|
|
rsa_alt->sign_func = sign_func;
|
|
rsa_alt->key_len_func = key_len_func;
|
|
|
|
return( 0 );
|
|
}
|
|
#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
|
|
|
|
/*
|
|
* Tell if a PK can do the operations of the given type
|
|
*/
|
|
int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_pk_type_t type )
|
|
{
|
|
/* A context with null pk_info is not set up yet and can't do anything.
|
|
* For backward compatibility, also accept NULL instead of a context
|
|
* pointer. */
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( 0 );
|
|
|
|
return( ctx->pk_info->can_do( type ) );
|
|
}
|
|
|
|
/*
|
|
* Helper for mbedtls_pk_sign and mbedtls_pk_verify
|
|
*/
|
|
static inline int pk_hashlen_helper( mbedtls_md_type_t md_alg, size_t *hash_len )
|
|
{
|
|
const mbedtls_md_info_t *md_info;
|
|
|
|
if( *hash_len != 0 && md_alg == MBEDTLS_MD_NONE )
|
|
return( 0 );
|
|
|
|
if( ( md_info = mbedtls_md_info_from_type( md_alg ) ) == NULL )
|
|
return( -1 );
|
|
|
|
if ( *hash_len != 0 && *hash_len != mbedtls_md_get_size( md_info ) )
|
|
return ( -1 );
|
|
|
|
*hash_len = mbedtls_md_get_size( md_info );
|
|
return( 0 );
|
|
}
|
|
|
|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
/*
|
|
* Helper to set up a restart context if needed
|
|
*/
|
|
static int pk_restart_setup( mbedtls_pk_restart_ctx *ctx,
|
|
const mbedtls_pk_info_t *info )
|
|
{
|
|
/* Don't do anything if already set up or invalid */
|
|
if( ctx == NULL || ctx->pk_info != NULL )
|
|
return( 0 );
|
|
|
|
/* Should never happen when we're called */
|
|
if( info->rs_alloc_func == NULL || info->rs_free_func == NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ( ctx->rs_ctx = info->rs_alloc_func() ) == NULL )
|
|
return( MBEDTLS_ERR_PK_ALLOC_FAILED );
|
|
|
|
ctx->pk_info = info;
|
|
|
|
return( 0 );
|
|
}
|
|
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
|
|
/*
|
|
* Verify a signature (restartable)
|
|
*/
|
|
int mbedtls_pk_verify_restartable( mbedtls_pk_context *ctx,
|
|
mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len,
|
|
mbedtls_pk_restart_ctx *rs_ctx )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) ||
|
|
hash != NULL );
|
|
PK_VALIDATE_RET( sig != NULL );
|
|
|
|
if( ctx->pk_info == NULL ||
|
|
pk_hashlen_helper( md_alg, &hash_len ) != 0 )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
/* optimization: use non-restartable version if restart disabled */
|
|
if( rs_ctx != NULL &&
|
|
mbedtls_ecp_restart_is_enabled() &&
|
|
ctx->pk_info->verify_rs_func != NULL )
|
|
{
|
|
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
|
|
if( ( ret = pk_restart_setup( rs_ctx, ctx->pk_info ) ) != 0 )
|
|
return( ret );
|
|
|
|
ret = ctx->pk_info->verify_rs_func( ctx->pk_ctx,
|
|
md_alg, hash, hash_len, sig, sig_len, rs_ctx->rs_ctx );
|
|
|
|
if( ret != MBEDTLS_ERR_ECP_IN_PROGRESS )
|
|
mbedtls_pk_restart_free( rs_ctx );
|
|
|
|
return( ret );
|
|
}
|
|
#else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
(void) rs_ctx;
|
|
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
|
|
if( ctx->pk_info->verify_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( ctx->pk_info->verify_func( ctx->pk_ctx, md_alg, hash, hash_len,
|
|
sig, sig_len ) );
|
|
}
|
|
|
|
/*
|
|
* Verify a signature
|
|
*/
|
|
int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len )
|
|
{
|
|
return( mbedtls_pk_verify_restartable( ctx, md_alg, hash, hash_len,
|
|
sig, sig_len, NULL ) );
|
|
}
|
|
|
|
/*
|
|
* Verify a signature with options
|
|
*/
|
|
int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
|
|
mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) ||
|
|
hash != NULL );
|
|
PK_VALIDATE_RET( sig != NULL );
|
|
|
|
if( ctx->pk_info == NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ! mbedtls_pk_can_do( ctx, type ) )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
if( type == MBEDTLS_PK_RSASSA_PSS )
|
|
{
|
|
#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21)
|
|
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
const mbedtls_pk_rsassa_pss_options *pss_opts;
|
|
|
|
#if SIZE_MAX > UINT_MAX
|
|
if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
#endif /* SIZE_MAX > UINT_MAX */
|
|
|
|
if( options == NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
pss_opts = (const mbedtls_pk_rsassa_pss_options *) options;
|
|
|
|
if( sig_len < mbedtls_pk_get_len( ctx ) )
|
|
return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
|
|
|
|
ret = mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_pk_rsa( *ctx ),
|
|
NULL, NULL, MBEDTLS_RSA_PUBLIC,
|
|
md_alg, (unsigned int) hash_len, hash,
|
|
pss_opts->mgf1_hash_id,
|
|
pss_opts->expected_salt_len,
|
|
sig );
|
|
if( ret != 0 )
|
|
return( ret );
|
|
|
|
if( sig_len > mbedtls_pk_get_len( ctx ) )
|
|
return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
|
|
|
|
return( 0 );
|
|
#else
|
|
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
|
|
#endif /* MBEDTLS_RSA_C && MBEDTLS_PKCS1_V21 */
|
|
}
|
|
|
|
/* General case: no options */
|
|
if( options != NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
return( mbedtls_pk_verify( ctx, md_alg, hash, hash_len, sig, sig_len ) );
|
|
}
|
|
|
|
/*
|
|
* Make a signature (restartable)
|
|
*/
|
|
int mbedtls_pk_sign_restartable( mbedtls_pk_context *ctx,
|
|
mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
unsigned char *sig, size_t *sig_len,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
|
|
mbedtls_pk_restart_ctx *rs_ctx )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) ||
|
|
hash != NULL );
|
|
PK_VALIDATE_RET( sig != NULL );
|
|
|
|
if( ctx->pk_info == NULL ||
|
|
pk_hashlen_helper( md_alg, &hash_len ) != 0 )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
/* optimization: use non-restartable version if restart disabled */
|
|
if( rs_ctx != NULL &&
|
|
mbedtls_ecp_restart_is_enabled() &&
|
|
ctx->pk_info->sign_rs_func != NULL )
|
|
{
|
|
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
|
|
if( ( ret = pk_restart_setup( rs_ctx, ctx->pk_info ) ) != 0 )
|
|
return( ret );
|
|
|
|
ret = ctx->pk_info->sign_rs_func( ctx->pk_ctx, md_alg,
|
|
hash, hash_len, sig, sig_len, f_rng, p_rng, rs_ctx->rs_ctx );
|
|
|
|
if( ret != MBEDTLS_ERR_ECP_IN_PROGRESS )
|
|
mbedtls_pk_restart_free( rs_ctx );
|
|
|
|
return( ret );
|
|
}
|
|
#else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
(void) rs_ctx;
|
|
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
|
|
if( ctx->pk_info->sign_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( ctx->pk_info->sign_func( ctx->pk_ctx, md_alg, hash, hash_len,
|
|
sig, sig_len, f_rng, p_rng ) );
|
|
}
|
|
|
|
/*
|
|
* Make a signature
|
|
*/
|
|
int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
unsigned char *sig, size_t *sig_len,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
|
{
|
|
return( mbedtls_pk_sign_restartable( ctx, md_alg, hash, hash_len,
|
|
sig, sig_len, f_rng, p_rng, NULL ) );
|
|
}
|
|
|
|
/*
|
|
* Decrypt message
|
|
*/
|
|
int mbedtls_pk_decrypt( mbedtls_pk_context *ctx,
|
|
const unsigned char *input, size_t ilen,
|
|
unsigned char *output, size_t *olen, size_t osize,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( input != NULL || ilen == 0 );
|
|
PK_VALIDATE_RET( output != NULL || osize == 0 );
|
|
PK_VALIDATE_RET( olen != NULL );
|
|
|
|
if( ctx->pk_info == NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ctx->pk_info->decrypt_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( ctx->pk_info->decrypt_func( ctx->pk_ctx, input, ilen,
|
|
output, olen, osize, f_rng, p_rng ) );
|
|
}
|
|
|
|
/*
|
|
* Encrypt message
|
|
*/
|
|
int mbedtls_pk_encrypt( mbedtls_pk_context *ctx,
|
|
const unsigned char *input, size_t ilen,
|
|
unsigned char *output, size_t *olen, size_t osize,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( input != NULL || ilen == 0 );
|
|
PK_VALIDATE_RET( output != NULL || osize == 0 );
|
|
PK_VALIDATE_RET( olen != NULL );
|
|
|
|
if( ctx->pk_info == NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ctx->pk_info->encrypt_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( ctx->pk_info->encrypt_func( ctx->pk_ctx, input, ilen,
|
|
output, olen, osize, f_rng, p_rng ) );
|
|
}
|
|
|
|
/*
|
|
* Check public-private key pair
|
|
*/
|
|
int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv )
|
|
{
|
|
PK_VALIDATE_RET( pub != NULL );
|
|
PK_VALIDATE_RET( prv != NULL );
|
|
|
|
if( pub->pk_info == NULL ||
|
|
prv->pk_info == NULL )
|
|
{
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
}
|
|
|
|
if( prv->pk_info->check_pair_func == NULL )
|
|
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
|
|
|
|
if( prv->pk_info->type == MBEDTLS_PK_RSA_ALT )
|
|
{
|
|
if( pub->pk_info->type != MBEDTLS_PK_RSA )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
}
|
|
else
|
|
{
|
|
if( pub->pk_info != prv->pk_info )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
}
|
|
|
|
return( prv->pk_info->check_pair_func( pub->pk_ctx, prv->pk_ctx ) );
|
|
}
|
|
|
|
/*
|
|
* Get key size in bits
|
|
*/
|
|
size_t mbedtls_pk_get_bitlen( const mbedtls_pk_context *ctx )
|
|
{
|
|
/* For backward compatibility, accept NULL or a context that
|
|
* isn't set up yet, and return a fake value that should be safe. */
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( 0 );
|
|
|
|
return( ctx->pk_info->get_bitlen( ctx->pk_ctx ) );
|
|
}
|
|
|
|
/*
|
|
* Export debug information
|
|
*/
|
|
int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
if( ctx->pk_info == NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ctx->pk_info->debug_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
ctx->pk_info->debug_func( ctx->pk_ctx, items );
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* Access the PK type name
|
|
*/
|
|
const char *mbedtls_pk_get_name( const mbedtls_pk_context *ctx )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( "invalid PK" );
|
|
|
|
return( ctx->pk_info->name );
|
|
}
|
|
|
|
/*
|
|
* Access the PK type
|
|
*/
|
|
mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( MBEDTLS_PK_NONE );
|
|
|
|
return( ctx->pk_info->type );
|
|
}
|
|
|
|
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
|
/*
|
|
* Load the key to a PSA key slot,
|
|
* then turn the PK context into a wrapper for that key slot.
|
|
*
|
|
* Currently only works for EC private keys.
|
|
*/
|
|
int mbedtls_pk_wrap_as_opaque( mbedtls_pk_context *pk,
|
|
psa_key_id_t *key,
|
|
psa_algorithm_t hash_alg )
|
|
{
|
|
#if !defined(MBEDTLS_ECP_C)
|
|
((void) pk);
|
|
((void) key);
|
|
((void) hash_alg);
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
#else
|
|
const mbedtls_ecp_keypair *ec;
|
|
unsigned char d[MBEDTLS_ECP_MAX_BYTES];
|
|
size_t d_len;
|
|
psa_ecc_family_t curve_id;
|
|
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
|
|
psa_key_type_t key_type;
|
|
size_t bits;
|
|
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
|
|
/* export the private key material in the format PSA wants */
|
|
if( mbedtls_pk_get_type( pk ) != MBEDTLS_PK_ECKEY )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
ec = mbedtls_pk_ec( *pk );
|
|
d_len = ( ec->grp.nbits + 7 ) / 8;
|
|
if( ( ret = mbedtls_mpi_write_binary( &ec->d, d, d_len ) ) != 0 )
|
|
return( ret );
|
|
|
|
curve_id = mbedtls_ecc_group_to_psa( ec->grp.id, &bits );
|
|
key_type = PSA_KEY_TYPE_ECC_KEY_PAIR( curve_id );
|
|
|
|
/* prepare the key attributes */
|
|
psa_set_key_type( &attributes, key_type );
|
|
psa_set_key_bits( &attributes, bits );
|
|
psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_HASH );
|
|
psa_set_key_algorithm( &attributes, PSA_ALG_ECDSA(hash_alg) );
|
|
|
|
/* import private key into PSA */
|
|
if( PSA_SUCCESS != psa_import_key( &attributes, d, d_len, key ) )
|
|
return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED );
|
|
|
|
/* make PK context wrap the key slot */
|
|
mbedtls_pk_free( pk );
|
|
mbedtls_pk_init( pk );
|
|
|
|
return( mbedtls_pk_setup_opaque( pk, *key ) );
|
|
#endif /* MBEDTLS_ECP_C */
|
|
}
|
|
#endif /* MBEDTLS_USE_PSA_CRYPTO */
|
|
#endif /* MBEDTLS_PK_C */
|