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Merge pull request #5525 from superna9999/5161-pk-rsa-encryption

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PK: RSA encryption
This commit is contained in:
Manuel Pégourié-Gonnard
2022-03-21 09:57:38 +01:00
committed by GitHub
parent 8d7afc642c 62e6ea2c22
commit 472044f21e
3 changed files with 126 additions and 11 deletions
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73
library/pk_wrap.c
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@ -365,6 +365,73 @@ static int rsa_decrypt_wrap( void *ctx,
}
#endif
#if defined(MBEDTLS_USE_PSA_CRYPTO)
static int rsa_encrypt_wrap( void *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 )
{
mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
psa_status_t status;
mbedtls_pk_context key;
int key_len;
unsigned char buf[MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES];
((void) f_rng);
((void) p_rng);
#if !defined(MBEDTLS_RSA_ALT)
if( rsa->padding != MBEDTLS_RSA_PKCS_V15 )
return( MBEDTLS_ERR_RSA_INVALID_PADDING );
#endif
if( mbedtls_rsa_get_len( rsa ) > osize )
return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
/* mbedtls_pk_write_pubkey_der() expects a full PK context;
* re-construct one to make it happy */
key.pk_info = &mbedtls_rsa_info;
key.pk_ctx = ctx;
key_len = mbedtls_pk_write_pubkey_der( &key, buf, sizeof( buf ) );
if( key_len <= 0 )
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_ENCRYPT );
psa_set_key_algorithm( &attributes, PSA_ALG_RSA_PKCS1V15_CRYPT );
psa_set_key_type( &attributes, PSA_KEY_TYPE_RSA_PUBLIC_KEY );
status = psa_import_key( &attributes,
buf + sizeof( buf ) - key_len, key_len,
&key_id );
if( status != PSA_SUCCESS )
{
ret = mbedtls_pk_error_from_psa( status );
goto cleanup;
}
status = psa_asymmetric_encrypt( key_id, PSA_ALG_RSA_PKCS1V15_CRYPT,
input, ilen,
NULL, 0,
output, osize, olen );
if( status != PSA_SUCCESS )
{
ret = mbedtls_pk_error_from_psa_rsa( status );
goto cleanup;
}
ret = 0;
cleanup:
status = psa_destroy_key( key_id );
if( ret == 0 && status != PSA_SUCCESS )
ret = mbedtls_pk_error_from_psa( status );
return( ret );
}
#else
static int rsa_encrypt_wrap( void *ctx,
const unsigned char *input, size_t ilen,
unsigned char *output, size_t *olen, size_t osize,
@ -379,6 +446,7 @@ static int rsa_encrypt_wrap( void *ctx,
return( mbedtls_rsa_pkcs1_encrypt( rsa, f_rng, p_rng,
ilen, input, output ) );
}
#endif
static int rsa_check_pair_wrap( const void *pub, const void *prv,
int (*f_rng)(void *, unsigned char *, size_t),
@ -855,7 +923,10 @@ static int ecdsa_verify_wrap( void *ctx_arg, mbedtls_md_type_t md_alg,
ret = 0;
cleanup:
psa_destroy_key( key_id );
status = psa_destroy_key( key_id );
if( ret == 0 && status != PSA_SUCCESS )
ret = mbedtls_pk_error_from_psa( status );
return( ret );
}
#else /* MBEDTLS_USE_PSA_CRYPTO */