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Alter program layout for better clarity

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Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
This commit is contained in:
Thomas Daubney 2023-10-12 10:46:43 +01:00
parent a21c972941
commit 2e67781e93
1 changed files with 28 additions and 28 deletions
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56
programs/psa/psa_hash.c
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@ -40,24 +40,7 @@
* Please see include/psa/crypto_values.h to see the other * Please see include/psa/crypto_values.h to see the other
* algorithms that are supported by Mbed TLS. * algorithms that are supported by Mbed TLS.
* If you switch to a different algorithm you will need to update * If you switch to a different algorithm you will need to update
* the hash data in the SAMPLE_HASH_DATA macro below. */ * the hash data in the EXAMPLE_HASH_VALUE macro below. */
#define HASH_ALG PSA_ALG_SHA_256
#define SAMPLE_HASH_DATA { \
0x7f, 0x83, 0xb1, 0x65, 0x7f, 0xf1, 0xfc, 0x53, 0xb9, 0x2d, 0xc1, 0x81, \
0x48, 0xa1, 0xd6, 0x5d, 0xfc, 0x2d, 0x4b, 0x1f, 0xa3, 0xd6, 0x77, 0x28, \
0x4a, 0xdd, 0xd2, 0x00, 0x12, 0x6d, 0x90, 0x69 \
}
const uint8_t sample_hash[] = SAMPLE_HASH_DATA;
const size_t sample_hash_len = sizeof(sample_hash);
const uint8_t sample_message[] = "Hello World!";
/* sample_message is terminated with a null byte which is not part of
* the message itself so we make sure to subtract it in order to get
* the message length. */
const size_t sample_message_length = sizeof(sample_message) - 1;
#if !defined(MBEDTLS_PSA_CRYPTO_C) || !defined(PSA_WANT_ALG_SHA_256) #if !defined(MBEDTLS_PSA_CRYPTO_C) || !defined(PSA_WANT_ALG_SHA_256)
int main(void) int main(void)
@ -68,6 +51,23 @@ int main(void)
} }
#else #else
#define HASH_ALG PSA_ALG_SHA_256
const uint8_t sample_message[] = "Hello World!";
/* sample_message is terminated with a null byte which is not part of
* the message itself so we make sure to subtract it in order to get
* the message length. */
const size_t sample_message_length = sizeof(sample_message) - 1;
#define EXPECTED_HASH_VALUE { \
0x7f, 0x83, 0xb1, 0x65, 0x7f, 0xf1, 0xfc, 0x53, 0xb9, 0x2d, 0xc1, 0x81, \
0x48, 0xa1, 0xd6, 0x5d, 0xfc, 0x2d, 0x4b, 0x1f, 0xa3, 0xd6, 0x77, 0x28, \
0x4a, 0xdd, 0xd2, 0x00, 0x12, 0x6d, 0x90, 0x69 \
}
const uint8_t expected_hash[] = EXPECTED_HASH_VALUE;
const size_t expected_hash_len = sizeof(expected_hash);
int main(void) int main(void)
{ {
psa_status_t status; psa_status_t status;
@ -85,13 +85,11 @@ int main(void)
} }
/* Compute hash using multi-part operation */ /* Compute hash using multi-part operation */
status = psa_hash_setup(&hash_operation, HASH_ALG); status = psa_hash_setup(&hash_operation, HASH_ALG);
if (status == PSA_ERROR_NOT_SUPPORTED){ if (status == PSA_ERROR_NOT_SUPPORTED) {
mbedtls_printf("unknown hash algorithm supplied\n"); mbedtls_printf("unknown hash algorithm supplied\n");
return EXIT_FAILURE; return EXIT_FAILURE;
} } else if (status != PSA_SUCCESS) {
else if (status != PSA_SUCCESS) {
mbedtls_printf("psa_hash_setup failed\n"); mbedtls_printf("psa_hash_setup failed\n");
return EXIT_FAILURE; return EXIT_FAILURE;
} }
@ -115,14 +113,15 @@ int main(void)
} }
/* Check the result of the operation against the sample */ /* Check the result of the operation against the sample */
if (hash_length != sample_hash_len || (memcmp(hash, sample_hash, sample_hash_len) != 0)) { if (hash_length != expected_hash_len ||
(memcmp(hash, expected_hash, expected_hash_len) != 0)) {
mbedtls_printf("Multi-part hash operation gave the wrong result!\n\n"); mbedtls_printf("Multi-part hash operation gave the wrong result!\n\n");
goto cleanup; goto cleanup;
} }
status = status =
psa_hash_verify(&cloned_hash_operation, sample_hash, psa_hash_verify(&cloned_hash_operation, expected_hash,
sample_hash_len); expected_hash_len);
if (status != PSA_SUCCESS) { if (status != PSA_SUCCESS) {
mbedtls_printf("psa_hash_verify failed\n"); mbedtls_printf("psa_hash_verify failed\n");
goto cleanup; goto cleanup;
@ -144,7 +143,8 @@ int main(void)
goto cleanup; goto cleanup;
} }
if (hash_length != sample_hash_len || (memcmp(hash, sample_hash, sample_hash_len) != 0)) { if (hash_length != expected_hash_len ||
(memcmp(hash, expected_hash, expected_hash_len) != 0)) {
mbedtls_printf("One-shot hash operation gave the wrong result!\n\n"); mbedtls_printf("One-shot hash operation gave the wrong result!\n\n");
goto cleanup; goto cleanup;
} }
@ -154,7 +154,7 @@ int main(void)
/* Print out result */ /* Print out result */
mbedtls_printf("The SHA-256( '%s' ) is: ", sample_message); mbedtls_printf("The SHA-256( '%s' ) is: ", sample_message);
for (size_t j = 0; j < sample_hash_len; j++) { for (size_t j = 0; j < expected_hash_len; j++) {
mbedtls_printf("%02x", hash[j]); mbedtls_printf("%02x", hash[j]);
} }
@ -168,4 +168,4 @@ cleanup:
psa_hash_abort(&cloned_hash_operation); psa_hash_abort(&cloned_hash_operation);
return EXIT_FAILURE; return EXIT_FAILURE;
} }
#endif /* MBEDTLS_PSA_CRYPTO_C && PSA_WANT_ALG_SHA_256 */ #endif /* !MBEDTLS_PSA_CRYPTO_C || !PSA_WANT_ALG_SHA_256 */