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/*
* 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 "psa/crypto.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define ASSERT( predicate ) \
do \
{ \
if( ! ( predicate ) ) \
{ \
printf( "\tassertion failed at %s:%d - '%s'\r\n", \
__FILE__, __LINE__, #predicate); \
goto exit; \
} \
} while ( 0 )
#define ASSERT_STATUS( actual, expected ) \
do \
{ \
if( ( actual ) != ( expected ) ) \
{ \
printf( "\tassertion failed at %s:%d - " \
"actual:%d expected:%d\r\n", __FILE__, __LINE__, \
(psa_status_t) actual, (psa_status_t) expected ); \
goto exit; \
} \
} while ( 0 )
#if !defined(MBEDTLS_PSA_CRYPTO_C) || !defined(MBEDTLS_AES_C) || \
!defined(MBEDTLS_CIPHER_MODE_CBC) || !defined(MBEDTLS_CIPHER_MODE_CTR) || \
!defined(MBEDTLS_CIPHER_MODE_WITH_PADDING) || \
defined(MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER)
int main( void )
{
printf( "MBEDTLS_PSA_CRYPTO_C and/or MBEDTLS_AES_C and/or "
"MBEDTLS_CIPHER_MODE_CBC and/or MBEDTLS_CIPHER_MODE_CTR "
"and/or MBEDTLS_CIPHER_MODE_WITH_PADDING "
"not defined and/or MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER"
" defined.\r\n" );
return( 0 );
}
#else
static psa_status_t cipher_operation( psa_cipher_operation_t *operation,
const uint8_t * input,
size_t input_size,
size_t part_size,
uint8_t * output,
size_t output_size,
size_t *output_len )
{
psa_status_t status;
size_t bytes_to_write = 0, bytes_written = 0, len = 0;
*output_len = 0;
while( bytes_written != input_size )
{
bytes_to_write = ( input_size - bytes_written > part_size ?
part_size :
input_size - bytes_written );
status = psa_cipher_update( operation, input + bytes_written,
bytes_to_write, output + *output_len,
output_size - *output_len, &len );
ASSERT_STATUS( status, PSA_SUCCESS );
bytes_written += bytes_to_write;
*output_len += len;
}
status = psa_cipher_finish( operation, output + *output_len,
output_size - *output_len, &len );
ASSERT_STATUS( status, PSA_SUCCESS );
*output_len += len;
exit:
return( status );
}
static psa_status_t cipher_encrypt( psa_key_id_t key,
psa_algorithm_t alg,
uint8_t * iv,
size_t iv_size,
const uint8_t * input,
size_t input_size,
size_t part_size,
uint8_t * output,
size_t output_size,
size_t *output_len )
{
psa_status_t status;
psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
size_t iv_len = 0;
memset( &operation, 0, sizeof( operation ) );
status = psa_cipher_encrypt_setup( &operation, key, alg );
ASSERT_STATUS( status, PSA_SUCCESS );
status = psa_cipher_generate_iv( &operation, iv, iv_size, &iv_len );
ASSERT_STATUS( status, PSA_SUCCESS );
status = cipher_operation( &operation, input, input_size, part_size,
output, output_size, output_len );
ASSERT_STATUS( status, PSA_SUCCESS );
exit:
psa_cipher_abort( &operation );
return( status );
}
static psa_status_t cipher_decrypt( psa_key_id_t key,
psa_algorithm_t alg,
const uint8_t * iv,
size_t iv_size,
const uint8_t * input,
size_t input_size,
size_t part_size,
uint8_t * output,
size_t output_size,
size_t *output_len )
{
psa_status_t status;
psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
memset( &operation, 0, sizeof( operation ) );
status = psa_cipher_decrypt_setup( &operation, key, alg );
ASSERT_STATUS( status, PSA_SUCCESS );
status = psa_cipher_set_iv( &operation, iv, iv_size );
ASSERT_STATUS( status, PSA_SUCCESS );
status = cipher_operation( &operation, input, input_size, part_size,
output, output_size, output_len );
ASSERT_STATUS( status, PSA_SUCCESS );
exit:
psa_cipher_abort( &operation );
return( status );
}
static psa_status_t
cipher_example_encrypt_decrypt_aes_cbc_nopad_1_block( void )
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH( PSA_KEY_TYPE_AES ),
key_bits = 256,
part_size = block_size,
};
const psa_algorithm_t alg = PSA_ALG_CBC_NO_PADDING;
psa_status_t status;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_key_id_t key = 0;
size_t output_len = 0;
uint8_t iv[block_size];
uint8_t input[block_size];
uint8_t encrypt[block_size];
uint8_t decrypt[block_size];
status = psa_generate_random( input, sizeof( input ) );
ASSERT_STATUS( status, PSA_SUCCESS );
psa_set_key_usage_flags( &attributes,
PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
psa_set_key_algorithm( &attributes, alg );
psa_set_key_type( &attributes, PSA_KEY_TYPE_AES );
psa_set_key_bits( &attributes, key_bits );
status = psa_generate_key( &attributes, &key );
ASSERT_STATUS( status, PSA_SUCCESS );
status = cipher_encrypt( key, alg, iv, sizeof( iv ),
input, sizeof( input ), part_size,
encrypt, sizeof( encrypt ), &output_len );
ASSERT_STATUS( status, PSA_SUCCESS );
status = cipher_decrypt( key, alg, iv, sizeof( iv ),
encrypt, output_len, part_size,
decrypt, sizeof( decrypt ), &output_len );
ASSERT_STATUS( status, PSA_SUCCESS );
status = memcmp( input, decrypt, sizeof( input ) );
ASSERT_STATUS( status, PSA_SUCCESS );
exit:
psa_destroy_key( key );
return( status );
}
static psa_status_t cipher_example_encrypt_decrypt_aes_cbc_pkcs7_multi( void )
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH( PSA_KEY_TYPE_AES ),
key_bits = 256,
input_size = 100,
part_size = 10,
};
const psa_algorithm_t alg = PSA_ALG_CBC_PKCS7;
psa_status_t status;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_key_id_t key = 0;
size_t output_len = 0;
uint8_t iv[block_size], input[input_size],
encrypt[input_size + block_size], decrypt[input_size + block_size];
status = psa_generate_random( input, sizeof( input ) );
ASSERT_STATUS( status, PSA_SUCCESS );
psa_set_key_usage_flags( &attributes,
PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
psa_set_key_algorithm( &attributes, alg );
psa_set_key_type( &attributes, PSA_KEY_TYPE_AES );
psa_set_key_bits( &attributes, key_bits );
status = psa_generate_key( &attributes, &key );
ASSERT_STATUS( status, PSA_SUCCESS );
status = cipher_encrypt( key, alg, iv, sizeof( iv ),
input, sizeof( input ), part_size,
encrypt, sizeof( encrypt ), &output_len );
ASSERT_STATUS( status, PSA_SUCCESS );
status = cipher_decrypt( key, alg, iv, sizeof( iv ),
encrypt, output_len, part_size,
decrypt, sizeof( decrypt ), &output_len );
ASSERT_STATUS( status, PSA_SUCCESS );
status = memcmp( input, decrypt, sizeof( input ) );
ASSERT_STATUS( status, PSA_SUCCESS );
exit:
psa_destroy_key( key );
return( status );
}
static psa_status_t cipher_example_encrypt_decrypt_aes_ctr_multi( void )
{
enum {
block_size = PSA_BLOCK_CIPHER_BLOCK_LENGTH( PSA_KEY_TYPE_AES ),
key_bits = 256,
input_size = 100,
part_size = 10,
};
const psa_algorithm_t alg = PSA_ALG_CTR;
psa_status_t status;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_key_id_t key = 0;
size_t output_len = 0;
uint8_t iv[block_size], input[input_size], encrypt[input_size],
decrypt[input_size];
status = psa_generate_random( input, sizeof( input ) );
ASSERT_STATUS( status, PSA_SUCCESS );
psa_set_key_usage_flags( &attributes,
PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT );
psa_set_key_algorithm( &attributes, alg );
psa_set_key_type( &attributes, PSA_KEY_TYPE_AES );
psa_set_key_bits( &attributes, key_bits );
status = psa_generate_key( &attributes, &key );
ASSERT_STATUS( status, PSA_SUCCESS );
status = cipher_encrypt( key, alg, iv, sizeof( iv ),
input, sizeof( input ), part_size,
encrypt, sizeof( encrypt ), &output_len );
ASSERT_STATUS( status, PSA_SUCCESS );
status = cipher_decrypt( key, alg, iv, sizeof( iv ),
encrypt, output_len, part_size,
decrypt, sizeof( decrypt ), &output_len );
ASSERT_STATUS( status, PSA_SUCCESS );
status = memcmp( input, decrypt, sizeof( input ) );
ASSERT_STATUS( status, PSA_SUCCESS );
exit:
psa_destroy_key( key );
return( status );
}
static void cipher_examples( void )
{
psa_status_t status;
printf( "cipher encrypt/decrypt AES CBC no padding:\r\n" );
status = cipher_example_encrypt_decrypt_aes_cbc_nopad_1_block( );
if( status == PSA_SUCCESS )
printf( "\tsuccess!\r\n" );
printf( "cipher encrypt/decrypt AES CBC PKCS7 multipart:\r\n" );
status = cipher_example_encrypt_decrypt_aes_cbc_pkcs7_multi( );
if( status == PSA_SUCCESS )
printf( "\tsuccess!\r\n" );
printf( "cipher encrypt/decrypt AES CTR multipart:\r\n" );
status = cipher_example_encrypt_decrypt_aes_ctr_multi( );
if( status == PSA_SUCCESS )
printf( "\tsuccess!\r\n" );
}
int main( void )
{
ASSERT( psa_crypto_init( ) == PSA_SUCCESS );
cipher_examples( );
exit:
mbedtls_psa_crypto_free( );
return( 0 );
}
#endif /* MBEDTLS_PSA_CRYPTO_C && MBEDTLS_AES_C && MBEDTLS_CIPHER_MODE_CBC &&
MBEDTLS_CIPHER_MODE_CTR && MBEDTLS_CIPHER_MODE_WITH_PADDING */
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