Update documentation
Add further information about PSA hashing to the
comment at the beginning of the code.
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
diff --git a/programs/psa/psa_hash.c b/programs/psa/psa_hash.c
index dc698a1..b3f3597 100644
--- a/programs/psa/psa_hash.c
+++ b/programs/psa/psa_hash.c
@@ -33,11 +33,15 @@
#include "mbedtls/build_info.h"
#include "mbedtls/platform.h"
-/* The algorithm used by this demo is SHA 256.
+/* Information about hashing with the PSA API can be
+ * found here:
+ * https://arm-software.github.io/psa-api/crypto/1.1/api/ops/hashes.html
+ *
+ * The algorithm used by this demo is SHA 256.
* Please see include/psa/crypto_values.h to see the other
- * algorithms that are supported. If you switch to a different
- * algorithm you will need to update the hash data in the
- * SAMPLE_HASH_DATA macro below.*/
+ * algorithms that are supported by Mbed TLS.
+ * If you switch to a different algorithm you will need to update
+ * the hash data in the SAMPLE_HASH_DATA macro below. */
#define HASH_ALG PSA_ALG_SHA_256