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Implement one-shot cipher

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Implement one-shot cipher APIs, psa_cipher_encrypt and psa_cipher_decrypt, introduced in PSA Crypto API 1.0.

Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
This commit is contained in:
gabor-mezei-arm 2021-03-01 15:04:24 +01:00
parent eaacabf98d
commit 0ef3b85381
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GPG Key ID: 106F5A41ECC305BD
1 changed files with 101 additions and 0 deletions
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101
library/psa_crypto.c
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@ -3481,6 +3481,107 @@ psa_status_t psa_cipher_abort( psa_cipher_operation_t *operation )
return( PSA_SUCCESS );
}
psa_status_t psa_cipher_encrypt( mbedtls_svc_key_id_t key,
psa_algorithm_t alg,
const uint8_t *input,
size_t input_length,
uint8_t *output,
size_t output_size,
size_t *output_length )
{
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
size_t iv_length = 0;;
size_t olength;
status = psa_cipher_encrypt_setup( &operation, key, alg );
if( status != PSA_SUCCESS )
goto exit;
*output_length = 0;
if( operation.iv_required )
{
status = psa_cipher_generate_iv( &operation, output,
operation.default_iv_length,
&iv_length );
*output_length += iv_length;
if( status != PSA_SUCCESS )
goto exit;
}
olength = 0;
status = psa_cipher_update( &operation, input, input_length,
output + iv_length, output_size - iv_length,
&olength );
*output_length += olength;
if( status != PSA_SUCCESS )
goto exit;
olength = 0;
status = psa_cipher_finish( &operation, output + *output_length,
output_size - *output_length, &olength );
*output_length += olength;
if( status != PSA_SUCCESS )
goto exit;
exit:
if ( status == PSA_SUCCESS )
status = psa_cipher_abort( &operation );
else
psa_cipher_abort( &operation );
return ( status );
}
psa_status_t psa_cipher_decrypt( mbedtls_svc_key_id_t key,
psa_algorithm_t alg,
const uint8_t *input,
size_t input_length,
uint8_t *output,
size_t output_size,
size_t *output_length )
{
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
size_t olength;
status = psa_cipher_decrypt_setup( &operation, key, alg );
if( status != PSA_SUCCESS )
goto exit;
if( operation.iv_required )
{
status = psa_cipher_set_iv( &operation, input,
operation.default_iv_length );
if( status != PSA_SUCCESS )
goto exit;
}
olength = 0;
status = psa_cipher_update( &operation, input + operation.default_iv_length,
input_length - operation.default_iv_length,
output, output_size, &olength );
*output_length = olength;
if( status != PSA_SUCCESS )
goto exit;
olength = 0;
status = psa_cipher_finish( &operation, output + *output_length,
output_size - *output_length, &olength );
*output_length += olength;
if( status != PSA_SUCCESS )
goto exit;
exit:
if ( status == PSA_SUCCESS )
status = psa_cipher_abort( &operation );
else
psa_cipher_abort( &operation );
return ( status );
}
/****************************************************************/
/* AEAD */
/****************************************************************/