Topic Path: Pending > TIdHashMessageDigest2.HashValue@TStream@Int64@Int64

Implements calculation of the 128-bit "fingerprint" or "message digest" for the MD2 message digest algorithm.

Stream containing input values for the message digest algorithm.
Initial stream position to use in calcualting the hash value.
Final stream position to use in calculating the hash value. 

T4x4LongWordRecord - 128-bit message digest calculated from the input data.

HashValue is an overloaded T4x4LongWordRecord function in TIdHashMessageDigest2 that implements calculation of the 128-bit "fingerprint" or "message digest" for the values in the AStream input stream. 

This version of the method provides support for calculating the hash value using only part of the data in AStream as indicated by the ABeginPos and AEndPos arguments. 

The position of the stream specified in AStream is set to the value in ABeginPos prior to performing the hash value calculation. 

HashValue reads 16-byte chunks of data from the values in AStream, and applies the 18-round substitution algorithm required for MD2.

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