psa_hash_compute() function
Calculate the hash (digest) of a message.
Arguments
alg
The hash algorithm to compute (\c PSA_ALG_XXX value such that #PSA_ALG_IS_HASH(\p alg) is true).
input
Buffer containing the message to hash.
input_length
Size of the \p input buffer in bytes.
hash
Buffer where the hash is to be written.
hash_size
Size of the \p hash buffer in bytes.
hash_length
On success, the number of bytes that make up the hash value. This is always #PSA_HASH_LENGTH(\p alg).
Return value
#PSA_SUCCESS Success. #PSA_ERROR_NOT_SUPPORTED \p alg is not supported or is not a hash algorithm. #PSA_ERROR_INVALID_ARGUMENT \emptydescription #PSA_ERROR_BUFFER_TOO_SMALL \p hash_size is too small #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription #PSA_ERROR_COMMUNICATION_FAILURE \emptydescription #PSA_ERROR_HARDWARE_FAILURE \emptydescription #PSA_ERROR_CORRUPTION_DETECTED \emptydescription #PSA_ERROR_BAD_STATE The library has not been previously initialized by psa_crypto_init(). It is implementation-dependent whether a failure to initialize results in this error code.
Notes
To verify the hash of a message against an expected value, use psa_hash_compare() instead.