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psa: cipher: Use psa_generate_random to generate IVs

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Use psa_generate_random() to generate IVs instead of
mbedtls_psa_get_random(). mbedtls_psa_get_random() is
meant to be used as the f_rng argument of Mbed TLS
library functions.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2021-03-23 11:31:19 +01:00
parent e6f6301390
commit f2381aaa43
1 changed files with 4 additions and 5 deletions
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9
library/psa_crypto_cipher.c
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@ -274,15 +274,14 @@ static psa_status_t cipher_generate_iv(
mbedtls_psa_cipher_operation_t *operation,
uint8_t *iv, size_t iv_size, size_t *iv_length )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
int status = PSA_ERROR_CORRUPTION_DETECTED;
if( iv_size < operation->iv_size )
return( PSA_ERROR_BUFFER_TOO_SMALL );
ret = mbedtls_psa_get_random( MBEDTLS_PSA_RANDOM_STATE,
iv, operation->iv_size );
if( ret != 0 )
return( mbedtls_to_psa_error( ret ) );
status = psa_generate_random( iv, operation->iv_size );
if( status != PSA_SUCCESS )
return( status );
*iv_length = operation->iv_size;