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RFC 1319: On "Checksum block" of "3.2 Step 2. Append Checksum", it is...

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Comment by Bernard Chong
Submitted on 2/25/2004
Related RFC: RFC 1319
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On "Checksum block" of "3.2 Step 2. Append Checksum", it is like following. /* Checksum block i. / For j = 0 to 15 do Set c to M[i16+j]. Set C[j] to S[c xor L]. // <--- This is the probable error line Set L to C[j]. end /* of loop on j / end / of loop on i / On the actual code of C, it is like following t = checksum[15]; for (i = 0; i < 16; i++) t = checksum[i] ^= PI_SUBST[block[i] ^ t]; "^=" should be "=" according to "3.2 Step 2" Since, C code is wide-spread, I guess C code is the correct one. Therefore, "Checksum block" of "3.2 Step 2. Append Checksum" should be changed like following. / Checksum block i. / For j = 0 to 15 do Set c to M[i16+j]. Set C[j] to (C[j] xor S[c xor L]). Set L to C[j]. end /* of loop on j / end / of loop on i */

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