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RFC 4634, "US Secure Hash Algorithms (SHA and HMAC-SHA)", July 2006

Note: This RFC has been obsoleted by RFC 6234

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: sec

Errata ID: 2427
Status: Held for Document Update
Type: Technical

Reported By: Alfred Hoenes
Date Reported: 2006-08-13
Held for Document Update by: Sean Turner
Date Held: 2010-08-06

Section 8.2.2 says:

Similar to item (9) and (16) above, the Description of SHA256Result
contains improper wording and unpleasent formatting. Additionally,
counting 32 elements as ranging from the "0th" up to the "32nd" is
unpleasant and wrong -- it would indicate 33 elements (octets) !

On page 39, the RFC says:

 * Description:
 *   This function will return the 256-bit message
 *   digest into the Message_Digest array provided by the caller.
 *   NOTE: The first octet of hash is stored in the 0th element,
 *      the last octet of hash in the 32nd element.

For correctness and consistency, and for improved readability,
it should say:

 * Description:
 *   This function will return the 256-bit message digest
 *   into the Message_Digest array provided by the caller.
 *   NOTE:
 *    The first octet of the hash is stored in the element with index 0,
 *    the last octet of the hash in the element with index 31.

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