Hashes the specified data using the United States Government Secure Hash Algorithm (SHA-1), and returns a 20-byte binary message digest value as a RAW value.
An optional key value to use in the hash operation. The key may be of type CHARACTER, LONGCHAR, RAW, or MEMPTR. If the key is a CHARACTER or LONGCHAR value, the AVM converts it to UTF-8 (which ensures a consistent value regardless of code page settings). To avoid this automatic conversion, specify a RAW or MEMPTR value. This key value is combined with the source data before the hash operation begins.
If the hash-key value contains a null character, the null character is included in the hash operation.