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Add pbkdf2_generate_block function

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Signed-off-by: Kusumit Ghoderao <Kusumit.Ghoderao@silabs.com>
This commit is contained in:
Kusumit Ghoderao 2023-06-05 14:50:20 +05:30
parent 85e6bdb7ad
commit a4346cdc50
1 changed files with 57 additions and 0 deletions
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57
library/psa_crypto.c
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@ -5474,6 +5474,63 @@ static psa_status_t psa_key_derivation_tls12_ecjpake_to_pms_read(
}
#endif
#if defined(MBEDTLS_PSA_BUILTIN_ALG_PBKDF2_HMAC)
static psa_status_t psa_key_derivation_pbkdf2_generate_block(
psa_pbkdf2_key_derivation_t *pbkdf2,
psa_algorithm_t prf_alg,
uint8_t prf_output_length,
psa_key_attributes_t *attributes)
{
psa_status_t status;
size_t mac_output_length;
uint8_t U_i[PSA_HASH_MAX_SIZE];
uint8_t U_accumulator[PSA_HASH_MAX_SIZE];
uint8_t j;
uint64_t i;
uint8_t *input = mbedtls_calloc(pbkdf2->salt_length + 4, 1);
memcpy(input, pbkdf2->salt, pbkdf2->salt_length);
MBEDTLS_PUT_UINT32_BE(pbkdf2->block_number, input, pbkdf2->salt_length);
status = psa_driver_wrapper_mac_compute(attributes, pbkdf2->password,
pbkdf2->password_length, prf_alg,
input, (pbkdf2->salt_length + 4),
U_i, prf_output_length,
&mac_output_length);
if (status != PSA_SUCCESS) {
goto cleanup;
}
memcpy(U_accumulator, U_i, mac_output_length);
for (i = 1; i < pbkdf2->input_cost; i++) {
status = psa_driver_wrapper_mac_compute(attributes,
pbkdf2->password,
pbkdf2->password_length,
prf_alg, U_i, prf_output_length,
U_i, prf_output_length,
&mac_output_length);
if (status != PSA_SUCCESS) {
goto cleanup;
}
// U1 xor U2
for (j = 0; j < prf_output_length; j++) {
U_accumulator[j] ^= U_i[j];
}
}
memcpy(pbkdf2->output_block, U_accumulator, prf_output_length);
cleanup:
/* Zeroise buffers to clear sensitive data from memory. */
mbedtls_platform_zeroize(U_accumulator, PSA_HASH_MAX_SIZE);
mbedtls_platform_zeroize(U_i, PSA_HASH_MAX_SIZE);
mbedtls_platform_zeroize(input, pbkdf2->salt_length + 4);
mbedtls_free(input);
return status;
}
#endif /* MBEDTLS_PSA_BUILTIN_ALG_PBKDF2_HMAC */
psa_status_t psa_key_derivation_output_bytes(
psa_key_derivation_operation_t *operation,
uint8_t *output,