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PSA: Implement MAC functions

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Implement psa_mac_start, psa_mac_update and psa_mac_final.

Implement HMAC anc CMAC.

Smoke tests.
This commit is contained in:
Gilles Peskine 2018-02-08 10:02:12 +01:00 committed by itayzafrir
parent 308b91d7db
commit 8c9def3e7f
4 changed files with 437 additions and 14 deletions
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79
include/psa/crypto.h
View file

@ -144,6 +144,9 @@ typedef uint32_t psa_key_type_t;
#define PSA_KEY_TYPE_IS_VENDOR_DEFINED(type) \
(((type) & PSA_KEY_TYPE_VENDOR_FLAG) != 0)
#define PSA_KEY_TYPE_IS_RAW_BYTES(type) \
(((type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_RAW_DATA || \
((type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC)
#define PSA_KEY_TYPE_IS_ASYMMETRIC(type) \
(((type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_ASYMMETRIC)
#define PSA_KEY_TYPE_IS_PUBLIC_KEY(type) \
@ -157,6 +160,13 @@ typedef uint32_t psa_key_type_t;
#define PSA_KEY_TYPE_IS_ECC(type) \
(((type) & ~PSA_KEY_TYPE_ECC_CURVE_MASK) == PSA_KEY_TYPE_ECC_BASE)
#define PSA_BLOCK_CIPHER_BLOCK_SIZE(key_type) \
( \
(type) == PSA_KEY_TYPE_AES ? 16 : \
(type) == PSA_KEY_TYPE_DES ? 8 : \
(type) == PSA_KEY_TYPE_CAMELLIA ? 16 : \
0)
/** \brief Encoding of a cryptographic algorithm.
*
* For algorithms that can be applied to multiple key types, this type
@ -223,25 +233,42 @@ typedef uint32_t psa_algorithm_t;
#define PSA_ALG_SHA3_384 ((psa_algorithm_t)0x01000012)
#define PSA_ALG_SHA3_512 ((psa_algorithm_t)0x01000013)
#define PSA_ALG_MAC_SUBCATEGORY_MASK ((psa_algorithm_t)0x00c00000)
#define PSA_ALG_HMAC_BASE ((psa_algorithm_t)0x02800000)
#define PSA_ALG_HMAC(hash_alg) \
(PSA_ALG_HMAC_BASE | (hash_alg))
#define PSA_ALG_CBC_MAC ((psa_algorithm_t)0x02000001)
#define PSA_ALG_CMAC ((psa_algorithm_t)0x02000002)
#define PSA_ALG_GMAC ((psa_algorithm_t)0x02000003)
(PSA_ALG_HMAC_BASE | ((hash_alg) & PSA_ALG_HASH_MASK))
#define PSA_ALG_HMAC_HASH(hmac_alg) \
(PSA_ALG_CATEGORY_HASH | ((hmac_alg) & PSA_ALG_HASH_MASK))
#define PSA_ALG_IS_HMAC(alg) \
(((alg) & (PSA_ALG_CATEGORY_MASK | PSA_ALG_MAC_SUBCATEGORY_MASK)) == \
PSA_ALG_HMAC_BASE)
#define PSA_ALG_CIPHER_MAC_BASE ((psa_algorithm_t)0x02c00000)
#define PSA_ALG_CBC_MAC ((psa_algorithm_t)0x02c00001)
#define PSA_ALG_CMAC ((psa_algorithm_t)0x02c00002)
#define PSA_ALG_GMAC ((psa_algorithm_t)0x02c00003)
#define PSA_ALG_IS_CIPHER_MAC(alg) \
(((alg) & (PSA_ALG_CATEGORY_MASK | PSA_ALG_MAC_SUBCATEGORY_MASK)) == \
PSA_ALG_CIPHER_MAC_BASE)
#define PSA_ALG_BLOCK_CIPHER_BASE_MASK ((psa_algorithm_t)0x000000ff)
#define PSA_ALG_CIPHER_SUBCATEGORY_MASK ((psa_algorithm_t)0x00c00000)
#define PSA_ALG_BLOCK_CIPHER_BASE ((psa_algorithm_t)0x04000001)
#define PSA_ALG_BLOCK_CIPHER_MODE_MASK ((psa_algorithm_t)0x000000ff)
#define PSA_ALG_BLOCK_CIPHER_PADDING_MASK ((psa_algorithm_t)0x007f0000)
#define PSA_ALG_BLOCK_CIPHER_PAD_PKCS7 ((psa_algorithm_t)0x00010000)
#define PSA_ALG_IS_BLOCK_CIPHER(alg) \
(((alg) & (PSA_ALG_CATEGORY_MASK | PSA_ALG_CIPHER_SUBCATEGORY_MASK)) == \
PSA_ALG_BLOCK_CIPHER_BASE)
#define PSA_ALG_CBC_BASE ((psa_algorithm_t)0x04000001)
#define PSA_ALG_CFB_BASE ((psa_algorithm_t)0x04000003)
#define PSA_ALG_OFB_BASE ((psa_algorithm_t)0x04000004)
#define PSA_ALG_XTS_BASE ((psa_algorithm_t)0x04000005)
#define PSA_ALG_CFB_BASE ((psa_algorithm_t)0x04000002)
#define PSA_ALG_OFB_BASE ((psa_algorithm_t)0x04000003)
#define PSA_ALG_XTS_BASE ((psa_algorithm_t)0x04000004)
#define PSA_ALG_STREAM_CIPHER ((psa_algorithm_t)0x04800000)
#define PSA_ALG_CTR ((psa_algorithm_t)0x04800001)
#define PSA_ALG_ARC4 ((psa_algorithm_t)0x04800002)
#define PSA_ALG_CCM ((psa_algorithm_t)0x06000002)
#define PSA_ALG_GCM ((psa_algorithm_t)0x06000003)
#define PSA_ALG_CCM ((psa_algorithm_t)0x06000001)
#define PSA_ALG_GCM ((psa_algorithm_t)0x06000002)
#define PSA_ALG_RSA_PKCS1V15_RAW ((psa_algorithm_t)0x10010000)
#define PSA_ALG_RSA_PSS_MGF1 ((psa_algorithm_t)0x10020000)
@ -575,6 +602,38 @@ psa_status_t psa_hash_abort(psa_hash_operation_t *operation);
/**@}*/
/** \defgroup MAC Message authentication codes
* @{
*/
typedef struct psa_mac_operation_s psa_mac_operation_t;
#define PSA_MAC_FINAL_SIZE(key_type, key_bits, alg) \
(PSA_ALG_IS_HMAC(alg) ? PSA_HASH_FINAL_SIZE(PSA_ALG_HMAC_HASH(alg)) : \
PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_SIZE(key_type) : \
0)
psa_status_t psa_mac_start(psa_mac_operation_t *operation,
psa_key_slot_t key,
psa_algorithm_t alg);
psa_status_t psa_mac_update(psa_mac_operation_t *operation,
const uint8_t *input,
size_t input_length);
psa_status_t psa_mac_finish(psa_mac_operation_t *operation,
uint8_t *mac,
size_t mac_size,
size_t *mac_length);
psa_status_t psa_mac_verify(psa_mac_operation_t *operation,
const uint8_t *mac,
size_t mac_length);
psa_status_t psa_mac_abort(psa_mac_operation_t *operation);
/**@}*/
/** \defgroup asymmetric Asymmetric cryptography
* @{
*/

301
library/psa_crypto.c
View file

@ -303,7 +303,7 @@ psa_status_t psa_import_key(psa_key_slot_t key,
if( slot->type != PSA_KEY_TYPE_NONE )
return( PSA_ERROR_OCCUPIED_SLOT );
if( type == PSA_KEY_TYPE_RAW_DATA )
if( PSA_KEY_TYPE_IS_RAW_BYTES( type ) )
{
if( data_length > SIZE_MAX / 8 )
return( PSA_ERROR_NOT_SUPPORTED );
@ -374,7 +374,7 @@ psa_status_t psa_destroy_key(psa_key_slot_t key)
if( slot->type == PSA_KEY_TYPE_NONE )
return( PSA_ERROR_EMPTY_SLOT );
if( slot->type == PSA_KEY_TYPE_RAW_DATA )
if( PSA_KEY_TYPE_IS_RAW_BYTES( slot->type ) )
{
mbedtls_free( slot->data.raw.data );
}
@ -420,7 +420,7 @@ psa_status_t psa_get_key_information(psa_key_slot_t key,
if( slot->type == PSA_KEY_TYPE_NONE )
return( PSA_ERROR_EMPTY_SLOT );
if( slot->type == PSA_KEY_TYPE_RAW_DATA )
if( PSA_KEY_TYPE_IS_RAW_BYTES( slot->type ) )
{
if( bits != NULL )
*bits = slot->data.raw.bytes * 8;
@ -465,7 +465,7 @@ psa_status_t psa_export_key(psa_key_slot_t key,
if( slot->type == PSA_KEY_TYPE_NONE )
return( PSA_ERROR_EMPTY_SLOT );
if( slot->type == PSA_KEY_TYPE_RAW_DATA )
if( PSA_KEY_TYPE_IS_RAW_BYTES( slot->type ) )
{
if( slot->data.raw.bytes > data_size )
return( PSA_ERROR_BUFFER_TOO_SMALL );
@ -856,6 +856,299 @@ psa_status_t psa_hash_verify(psa_hash_operation_t *operation,
/****************************************************************/
/* MAC */
/****************************************************************/
static const mbedtls_cipher_info_t *mbedtls_cipher_info_of_psa(
psa_algorithm_t alg,
psa_key_type_t key_type,
size_t key_bits )
{
mbedtls_cipher_id_t cipher_id;
mbedtls_cipher_mode_t mode;
if( PSA_ALG_IS_CIPHER( alg ) || PSA_ALG_IS_AEAD( alg ) )
{
if( PSA_ALG_IS_BLOCK_CIPHER( alg ) )
alg &= ~PSA_ALG_BLOCK_CIPHER_MODE_MASK;
switch( alg )
{
case PSA_ALG_STREAM_CIPHER:
mode = MBEDTLS_MODE_STREAM;
break;
case PSA_ALG_CBC_BASE:
mode = MBEDTLS_MODE_CBC;
break;
case PSA_ALG_CFB_BASE:
mode = MBEDTLS_MODE_CFB;
break;
case PSA_ALG_OFB_BASE:
mode = MBEDTLS_MODE_OFB;
break;
case PSA_ALG_CTR:
mode = MBEDTLS_MODE_CTR;
break;
case PSA_ALG_CCM:
mode = MBEDTLS_MODE_CCM;
break;
case PSA_ALG_GCM:
mode = MBEDTLS_MODE_GCM;
break;
default:
return( NULL );
}
}
else if( alg == PSA_ALG_CMAC )
mode = MBEDTLS_MODE_ECB;
else if( alg == PSA_ALG_GMAC )
mode = MBEDTLS_MODE_GCM;
else
return( NULL );
switch( key_type )
{
case PSA_KEY_TYPE_AES:
cipher_id = MBEDTLS_CIPHER_ID_AES;
break;
case PSA_KEY_TYPE_DES:
if( key_bits == 64 )
cipher_id = MBEDTLS_CIPHER_ID_DES;
else
cipher_id = MBEDTLS_CIPHER_ID_3DES;
break;
case PSA_KEY_TYPE_CAMELLIA:
cipher_id = MBEDTLS_CIPHER_ID_CAMELLIA;
break;
case PSA_KEY_TYPE_ARC4:
cipher_id = MBEDTLS_CIPHER_ID_ARC4;
break;
default:
return( NULL );
}
return( mbedtls_cipher_info_from_values( cipher_id, key_bits, mode ) );
}
psa_status_t psa_mac_abort( psa_mac_operation_t *operation )
{
switch( operation->alg )
{
#if defined(MBEDTLS_CMAC_C)
case PSA_ALG_CMAC:
mbedtls_cipher_free( &operation->ctx.cmac );
break;
#endif /* MBEDTLS_CMAC_C */
default:
#if defined(MBEDTLS_MD_C)
if( PSA_ALG_IS_HMAC( operation->alg ) )
mbedtls_md_free( &operation->ctx.hmac );
else
#endif /* MBEDTLS_MD_C */
return( PSA_ERROR_NOT_SUPPORTED );
}
operation->alg = 0;
operation->key_set = 0;
operation->iv_set = 0;
operation->iv_required = 0;
operation->has_input = 0;
return( PSA_SUCCESS );
}
psa_status_t psa_mac_start( psa_mac_operation_t *operation,
psa_key_slot_t key,
psa_algorithm_t alg )
{
int ret = MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE;
psa_status_t status;
key_slot_t *slot;
psa_key_type_t key_type;
size_t key_bits;
const mbedtls_cipher_info_t *cipher_info = NULL;
operation->alg = 0;
operation->key_set = 0;
operation->iv_set = 0;
operation->iv_required = 1;
operation->has_input = 0;
status = psa_get_key_information( key, &key_type, &key_bits );
if( status != PSA_SUCCESS )
return( status );
slot = &global_data.key_slots[key];
if( ! PSA_ALG_IS_HMAC( alg ) )
{
cipher_info = mbedtls_cipher_info_of_psa( alg, key_type, key_bits );
if( cipher_info == NULL )
return( PSA_ERROR_NOT_SUPPORTED );
operation->mac_size = cipher_info->block_size;
}
switch( alg )
{
#if defined(MBEDTLS_CMAC_C)
case PSA_ALG_CMAC:
operation->iv_required = 0;
mbedtls_cipher_init( &operation->ctx.cmac );
ret = mbedtls_cipher_setup( &operation->ctx.cmac, cipher_info );
if( ret != 0 )
break;
ret = mbedtls_cipher_cmac_starts( &operation->ctx.cmac,
slot->data.raw.data,
key_bits );
break;
#endif /* MBEDTLS_CMAC_C */
default:
#if defined(MBEDTLS_MD_C)
if( PSA_ALG_IS_HMAC( alg ) )
{
const mbedtls_md_info_t *md_info =
mbedtls_md_info_of_psa( PSA_ALG_HMAC_HASH( alg ) );
if( md_info == NULL )
return( PSA_ERROR_NOT_SUPPORTED );
if( key_type != PSA_KEY_TYPE_HMAC )
return( PSA_ERROR_INVALID_ARGUMENT );
operation->iv_required = 0;
operation->mac_size = mbedtls_md_get_size( md_info );
mbedtls_md_init( &operation->ctx.hmac );
ret = mbedtls_md_setup( &operation->ctx.hmac, md_info, 1 );
if( ret != 0 )
break;
ret = mbedtls_md_hmac_starts( &operation->ctx.hmac,
slot->data.raw.data,
slot->data.raw.bytes );
break;
}
else
#endif /* MBEDTLS_MD_C */
return( PSA_ERROR_NOT_SUPPORTED );
}
/* If we reach this point, then the algorithm-specific part of the
* context has at least been initialized, and may contain data that
* needs to be wiped on error. */
operation->alg = alg;
if( ret != 0 )
{
psa_mac_abort( operation );
return( mbedtls_to_psa_error( ret ) );
}
operation->key_set = 1;
return( 0 );
}
psa_status_t psa_mac_update( psa_mac_operation_t *operation,
const uint8_t *input,
size_t input_length )
{
int ret;
if( ! operation->key_set )
return( PSA_ERROR_BAD_STATE );
if( operation->iv_required && ! operation->iv_set )
return( PSA_ERROR_BAD_STATE );
operation->has_input = 1;
switch( operation->alg )
{
#if defined(MBEDTLS_CMAC_C)
case PSA_ALG_CMAC:
ret = mbedtls_cipher_cmac_update( &operation->ctx.cmac,
input, input_length );
break;
#endif /* MBEDTLS_CMAC_C */
default:
#if defined(MBEDTLS_MD_C)
if( PSA_ALG_IS_HMAC( operation->alg ) )
{
ret = mbedtls_md_hmac_update( &operation->ctx.hmac,
input, input_length );
}
else
#endif /* MBEDTLS_MD_C */
{
ret = MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
break;
}
if( ret != 0 )
psa_mac_abort( operation );
return( mbedtls_to_psa_error( ret ) );
}
psa_status_t psa_mac_finish( psa_mac_operation_t *operation,
uint8_t *mac,
size_t mac_size,
size_t *mac_length )
{
int ret;
if( ! operation->key_set )
return( PSA_ERROR_BAD_STATE );
if( operation->iv_required && ! operation->iv_set )
return( PSA_ERROR_BAD_STATE );
/* Fill the output buffer with something that isn't a valid mac
* (barring an attack on the mac and deliberately-crafted input),
* in case the caller doesn't check the return status properly. */
*mac_length = operation->mac_size;
memset( mac, '!', mac_size );
if( mac_size < operation->mac_size )
return( PSA_ERROR_BUFFER_TOO_SMALL );
switch( operation->alg )
{
#if defined(MBEDTLS_CMAC_C)
case PSA_ALG_CMAC:
ret = mbedtls_cipher_cmac_finish( &operation->ctx.cmac, mac );
break;
#endif /* MBEDTLS_CMAC_C */
default:
#if defined(MBEDTLS_MD_C)
if( PSA_ALG_IS_HMAC( operation->alg ) )
{
ret = mbedtls_md_hmac_finish( &operation->ctx.hmac, mac );
}
else
#endif /* MBEDTLS_MD_C */
{
ret = MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
break;
}
if( ret == 0 )
{
return( psa_mac_abort( operation ) );
}
else
{
psa_mac_abort( operation );
return( mbedtls_to_psa_error( ret ) );
}
}
#define MBEDTLS_PSA_MAC_MAX_SIZE \
( MBEDTLS_MD_MAX_SIZE > MBEDTLS_MAX_BLOCK_LENGTH ? \
MBEDTLS_MD_MAX_SIZE : \
MBEDTLS_MAX_BLOCK_LENGTH )
psa_status_t psa_mac_verify( psa_mac_operation_t *operation,
const uint8_t *mac,
size_t mac_length )
{
uint8_t actual_mac[MBEDTLS_PSA_MAC_MAX_SIZE];
size_t actual_mac_length;
psa_status_t status = psa_mac_finish( operation,
actual_mac, sizeof( actual_mac ),
&actual_mac_length );
if( status != PSA_SUCCESS )
return( status );
if( actual_mac_length != mac_length )
return( PSA_ERROR_INVALID_SIGNATURE );
if( safer_memcmp( mac, actual_mac, actual_mac_length ) != 0 )
return( PSA_ERROR_INVALID_SIGNATURE );
return( PSA_SUCCESS );
}
/****************************************************************/

8
tests/suites/test_suite_psa_crypto.data
View file

@ -45,6 +45,14 @@ PSA hash verify: SHA-256
depends_on:MBEDTLS_SHA256_C
hash_verify:PSA_ALG_SHA_256:"bd":"68325720aabd7c82f30f554b313d0570c95accbb7dc4b5aae11204c08ffe732b"
PSA MAC verify: HMAC-SHA-256
depends_on:MBEDTLS_MD_C:MBEDTLS_SHA256_C
mac_verify:PSA_KEY_TYPE_HMAC:"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f":PSA_ALG_HMAC(PSA_ALG_SHA_256):"":"53616d706c65206d65737361676520666f72206b65796c656e3d626c6f636b6c656e":"8bb9a1db9806f20df7f77b82138c7914d174d59e13dc4d0169c9057b133e1d62"
PSA MAC verify: CMAC-AES-128
depends_on:MBEDTLS_CMAC_C:MBEDTLS_AES_C
mac_verify:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":PSA_ALG_CMAC:"":"6bc1bee22e409f96e93d7e117393172aae2d8a571e03ac9c9eb76fac45af8e5130c81c46a35ce411":"dfa66747de9ae63030ca32611497c827"
PSA signature size: RSA keypair, 1024 bits, PKCS#1 v1.5 raw
signature_size:PSA_KEY_TYPE_RSA_KEYPAIR:1024:PSA_ALG_RSA_PKCS1V15_RAW:128

63
tests/suites/test_suite_psa_crypto.function
View file

@ -1,5 +1,7 @@
/* BEGIN_HEADER */
#include "psa/crypto.h"
#include "mbedtls/md.h"
/* END_HEADER */
/* BEGIN_DEPENDENCIES
@ -200,6 +202,67 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE */
void mac_verify( int key_type_arg, char *key_hex,
int alg_arg, char *iv_hex,
char *input_hex, char *mac_hex )
{
int key_slot = 1;
psa_key_type_t key_type = key_type_arg;
psa_algorithm_t alg = alg_arg;
unsigned char *key = NULL;
size_t key_size;
unsigned char *iv = NULL;
size_t iv_size;
unsigned char *input = NULL;
size_t input_size;
unsigned char *expected_mac = NULL;
size_t expected_mac_size;
psa_mac_operation_t operation;
key_size = strlen( key_hex ) / 2;
key = mbedtls_calloc( 1, key_size );
TEST_ASSERT( key != NULL );
key_size = unhexify( key, key_hex );
iv_size = strlen( iv_hex ) / 2;
if( iv_size != 0 )
{
iv = mbedtls_calloc( 1, iv_size );
TEST_ASSERT( iv != NULL );
iv_size = unhexify( iv, iv_hex );
}
input_size = strlen( input_hex ) / 2;
input = mbedtls_calloc( 1, input_size );
TEST_ASSERT( input != NULL );
input_size = unhexify( input, input_hex );
expected_mac_size = strlen( mac_hex ) / 2;
expected_mac = mbedtls_calloc( 1, expected_mac_size );
TEST_ASSERT( expected_mac != NULL );
expected_mac_size = unhexify( expected_mac, mac_hex );
TEST_ASSERT( psa_crypto_init( ) == PSA_SUCCESS );
TEST_ASSERT( psa_import_key( key_slot, key_type,
key, key_size ) == PSA_SUCCESS );
// TODO: support IV
TEST_ASSERT( psa_mac_start( &operation, key_slot, alg ) == PSA_SUCCESS );
TEST_ASSERT( psa_destroy_key( key_slot ) == PSA_SUCCESS );
TEST_ASSERT( psa_mac_update( &operation,
input, input_size ) == PSA_SUCCESS );
TEST_ASSERT( psa_mac_verify( &operation,
expected_mac,
expected_mac_size ) == PSA_SUCCESS );
exit:
mbedtls_free( key );
mbedtls_free( iv );
mbedtls_free( input );
mbedtls_free( expected_mac );
psa_destroy_key( key_slot );
mbedtls_psa_crypto_free( );
}
/* END_CASE */
/* BEGIN_CASE */
void signature_size( int type_arg, int bits, int alg_arg, int expected_size_arg )
{