Chapter 4-8: Runtime Subroutine's and Predefined Processes

.UTIL COMPUTE HASH

 This subroutine computes the SHA-2 hash value for the given string.

Usage:

Description:

This subroutine computes the SHA-2 hash value for the given string. The first 2 parameters are required and if any required parameters are missing, the subroutine will CANCEL.

<hash value returned> is the computed value returned. This must be passed with Share="Y" to return a value. It should be an alpha field at least 64 or 128 bytes in length, depending on the <hash type> requested (Required).

<hash type> is the type of hash value you want returned (Required):

• BIN for a 64 byte binary value
• UC for a 128 byte readable value, upper case
• LC for a 128 byte readable value, lower case

<Data to hash> is the string to be hashed (32k max size).

<Unicode flag> Pass UNI if you want the calculation performed on a Unicode field (optional, Release 6.0 and higher only). For compatibility with release 5, the hash calculation is performed on a RAW field. PASSing a unicode field in <Data to hash> that contains characters that cannot be transcoded to the RAW encoding will result in a runtime error. To force the calculation to be performed on the Unicode field, pass UNI for <Unicode flag>. Note that since RAW and Unicode fields have different internal structures, passing the same string with and without the <Unicode Flag> will return different hash values.

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