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RFC 3447, "Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.1", February 2003

Note: This RFC has been obsoleted by RFC 8017

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: sec
See Also: RFC 3447 w/ inline errata

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Errata ID: 633
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Alfred Hoenes
Date Reported: 2003-08-28

Section 7.1.1 says:

                             +----------+---------+-------+
                        DB = |  lHash   |    PS   |   M   |
                             +----------+---------+-------+
                                            |
                  +----------+              V
                  |   seed   |--> MGF ---> xor
                  +----------+              |
                        |                   |
               +--+     V                   |
               |00|    xor <----- MGF <-----|
               +--+     |                   |
                 |      |                   |
                 V      V                   V
               +--+----------+----------------------------+
         EM =  |00|maskedSeed|          maskedDB          |
               +--+----------+----------------------------+

It should say:

                             +----------+--------+--+-------+
                        DB = |  lHash   |   PS   |01|   M   |
                             +----------+--------+--+-------+
                                            |
                  +----------+              V
                  |   seed   |--> MGF ---> xor
                  +----------+              |
                        |                   |
               +--+     V                   |
               |00|    xor <----- MGF <-----|
               +--+     |                   |
                 |      |                   |
                 V      V                   V
               +--+----------+------------------------------+
         EM =  |00|maskedSeed|          maskedDB            |
               +--+----------+------------------------------+

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