From 5ace5e478add7e1f0d73503f649fa27376829740 Mon Sep 17 00:00:00 2001 From: Jeffrey Walton Date: Thu, 27 Dec 2018 17:47:20 -0500 Subject: [PATCH] Spelling corrections --- filters.cpp | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/filters.cpp b/filters.cpp index ed24be5d..c07e912c 100644 --- a/filters.cpp +++ b/filters.cpp @@ -694,12 +694,13 @@ void StreamTransformationFilter::NextPutModifiable(byte *inString, size_t length void StreamTransformationFilter::LastPut(const byte *inString, size_t length) { - // This block is new to StreamTransformationFilter. It somewhat of a hack and was added - // for OCB mode; see GitHub Issue 515. The rub with OCB is, its a block cipher and the - // last block size can be 0. However, "last block = 0" is not the 0 predacted in the - // original code. In the orginal code 0 means "nothing special" so DEFAULT_PADDING is - // applied. OCB's 0 literally means a final block size can be 0 or non-0; and no padding - // is needed in either case because OCB has its own scheme (see handling of P_* and A_*). + // This block is new to StreamTransformationFilter. It is somewhat of a hack and was + // added for OCB mode; see GitHub Issue 515. The rub with OCB is, its a block cipher + // and the last block size can be 0. However, "last block = 0" is not the 0 predicated + // in the original code. In the orginal code 0 means "nothing special" so + // DEFAULT_PADDING is applied. OCB's 0 literally means a final block size can be 0 or + // non-0; and no padding is needed in either case because OCB has its own scheme (see + // handling of P_* and A_*). // Stream ciphers have policy objects to convey how to operate the cipher. The Crypto++ // framework operates well when MinLastBlockSize() is 1. However, it did not appear to // cover the OCB case either because we can't stream OCB. It needs full block sizes. In @@ -712,7 +713,7 @@ void StreamTransformationFilter::LastPut(const byte *inString, size_t length) // In some respect we have already hit the need for more information. For example, OCB // calculates the checksum on the cipher text at the same time, so we don't need the // disjoint behavior of calling "EncryptBlock" followed by a separate "AuthenticateBlock". - // Additional information may allow us to avoid the two spearate calls. + // Additional information may allow us to avoid the two separate calls. if (m_isSpecial) { const size_t leftOver = length % m_mandatoryBlockSize;