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psa: cipher: Add utility functions

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Isolate the Mbed TLS cipher driver interfaces.
Do the actual cipher operations in utility
functions that are just called by the interface
functions.

The utility functions are intended to be also called
by the cipher test driver interface functions (to be
introduced subsequently) and allow to test the case
where cipher operations are fully accelerated with no
fallback (component test_psa_crypto_config_basic of
all.sh).

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2021-03-12 10:35:18 +01:00
parent 7cb9c3d360
commit 8287e6b078
1 changed files with 84 additions and 27 deletions
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111
library/psa_crypto_cipher.c
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@ -119,7 +119,7 @@ exit:
return( mbedtls_to_psa_error( ret ) );
}
psa_status_t mbedtls_psa_cipher_encrypt_setup(
static psa_status_t cipher_encrypt_setup(
mbedtls_psa_cipher_operation_t *operation,
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
@ -130,7 +130,7 @@ psa_status_t mbedtls_psa_cipher_encrypt_setup(
alg, MBEDTLS_ENCRYPT ) );
}
psa_status_t mbedtls_psa_cipher_decrypt_setup(
static psa_status_t cipher_decrypt_setup(
mbedtls_psa_cipher_operation_t *operation,
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
@ -141,7 +141,18 @@ psa_status_t mbedtls_psa_cipher_decrypt_setup(
alg, MBEDTLS_DECRYPT ) );
}
psa_status_t mbedtls_psa_cipher_generate_iv(
static psa_status_t cipher_set_iv( mbedtls_psa_cipher_operation_t *operation,
const uint8_t *iv, size_t iv_length )
{
if( iv_length != operation->iv_size )
return( PSA_ERROR_INVALID_ARGUMENT );
return( mbedtls_to_psa_error(
mbedtls_cipher_set_iv( &operation->cipher,
iv, iv_length ) ) );
}
static psa_status_t cipher_generate_iv(
mbedtls_psa_cipher_operation_t *operation,
uint8_t *iv, size_t iv_size, size_t *iv_length )
{
@ -157,19 +168,7 @@ psa_status_t mbedtls_psa_cipher_generate_iv(
*iv_length = operation->iv_size;
return( mbedtls_psa_cipher_set_iv( operation, iv, *iv_length ) );
}
psa_status_t mbedtls_psa_cipher_set_iv( mbedtls_psa_cipher_operation_t *operation,
const uint8_t *iv,
size_t iv_length )
{
if( iv_length != operation->iv_size )
return( PSA_ERROR_INVALID_ARGUMENT );
return( mbedtls_to_psa_error(
mbedtls_cipher_set_iv( &operation->cipher,
iv, iv_length ) ) );
return( cipher_set_iv( operation, iv, *iv_length ) );
}
/* Process input for which the algorithm is set to ECB mode. This requires
@ -260,12 +259,12 @@ exit:
return( status );
}
psa_status_t mbedtls_psa_cipher_update( mbedtls_psa_cipher_operation_t *operation,
const uint8_t *input,
size_t input_length,
uint8_t *output,
size_t output_size,
size_t *output_length )
static psa_status_t cipher_update( mbedtls_psa_cipher_operation_t *operation,
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;
size_t expected_output_size;
@ -310,10 +309,10 @@ psa_status_t mbedtls_psa_cipher_update( mbedtls_psa_cipher_operation_t *operatio
return( status );
}
psa_status_t mbedtls_psa_cipher_finish( mbedtls_psa_cipher_operation_t *operation,
uint8_t *output,
size_t output_size,
size_t *output_length )
static psa_status_t cipher_finish( mbedtls_psa_cipher_operation_t *operation,
uint8_t *output,
size_t output_size,
size_t *output_length )
{
psa_status_t status = PSA_ERROR_GENERIC_ERROR;
uint8_t temp_output_buffer[MBEDTLS_MAX_BLOCK_LENGTH];
@ -349,7 +348,7 @@ exit:
return( status );
}
psa_status_t mbedtls_psa_cipher_abort( mbedtls_psa_cipher_operation_t *operation )
static psa_status_t cipher_abort( mbedtls_psa_cipher_operation_t *operation )
{
/* Sanity check (shouldn't happen: operation->alg should
* always have been initialized to a valid value). */
@ -361,4 +360,62 @@ psa_status_t mbedtls_psa_cipher_abort( mbedtls_psa_cipher_operation_t *operation
return( PSA_SUCCESS );
}
psa_status_t mbedtls_psa_cipher_encrypt_setup(
mbedtls_psa_cipher_operation_t *operation,
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
psa_algorithm_t alg )
{
return( cipher_encrypt_setup(
operation, attributes, key_buffer, key_buffer_size, alg ) );
}
psa_status_t mbedtls_psa_cipher_decrypt_setup(
mbedtls_psa_cipher_operation_t *operation,
const psa_key_attributes_t *attributes,
const uint8_t *key_buffer, size_t key_buffer_size,
psa_algorithm_t alg )
{
return( cipher_decrypt_setup(
operation, attributes, key_buffer, key_buffer_size, alg ) );
}
psa_status_t mbedtls_psa_cipher_generate_iv(
mbedtls_psa_cipher_operation_t *operation,
uint8_t *iv, size_t iv_size, size_t *iv_length )
{
return( cipher_generate_iv( operation, iv, iv_size, iv_length ) );
}
psa_status_t mbedtls_psa_cipher_set_iv( mbedtls_psa_cipher_operation_t *operation,
const uint8_t *iv,
size_t iv_length )
{
return( cipher_set_iv( operation, iv, iv_length ) );
}
psa_status_t mbedtls_psa_cipher_update( mbedtls_psa_cipher_operation_t *operation,
const uint8_t *input,
size_t input_length,
uint8_t *output,
size_t output_size,
size_t *output_length )
{
return( cipher_update( operation, input, input_length,
output, output_size, output_length ) );
}
psa_status_t mbedtls_psa_cipher_finish( mbedtls_psa_cipher_operation_t *operation,
uint8_t *output,
size_t output_size,
size_t *output_length )
{
return( cipher_finish( operation, output, output_size, output_length ) );
}
psa_status_t mbedtls_psa_cipher_abort( mbedtls_psa_cipher_operation_t *operation )
{
return( cipher_abort( operation ) );
}
#endif /* MBEDTLS_PSA_CRYPTO_C */