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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: 37
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT

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

Section 8.2.1 says:

The Description of SHA1PadMessage, on page 30, says:

 * Description:
 *   According to the standard, the message must be padded to an
 *   even 512 bits. The first padding bit must be a '1'. The last
 *   64 bits represent the length of the original message. All bits
 *   in between should be 0. This helper function will pad the
 *   message according to those rules by filling the Message_Block
 *   array accordingly. When it returns, it can be assumed that the
 *   message digest has been computed.

For clarity, it should say:

 * Description:
|*   According to the standard, the message must be padded to the next
|*   proper multiple of 512 bits. The first padding bit must be a '1'.
 *   The last 64 bits represent the length of the original message.
 *   All bits in between should be 0. This helper function will pad
 *   the message according to those rules by filling the Message_Block
 *   array accordingly. When it returns, it can be assumed that the
 *   message digest has been computed.

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