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Update documentation

pull/548/head
Jeffrey Walton 2017-11-24 00:06:48 -05:00
parent 5267723a49
commit 8c29b1a4d3
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GPG Key ID: B36AB348921B1838
3 changed files with 14 additions and 16 deletions
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2
TestVectors/sm3.txt
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@ -10,7 +10,7 @@ Digest: 00000000 62eeedd9 d1f2d46b dc10e4e2 4167c487 5cf2f7a2 297da02b 8f4ba8e0
Test: NotVerify
#
Source: SM3 Hash function, https://tools.ietf.org/html/draft-shen-sm3-hash
Comment: Appendix B, test vector 1
Comment: Appendix B, test vector 2
Message: 61626364 61626364 61626364 61626364 61626364 61626364 61626364 61626364 \
61626364 61626364 61626364 61626364 61626364 61626364 61626364 61626364
Digest: debe9ff9 2275b8a1 38604889 c18e5a4d 6fdb70e5 387e5765 293dcba3 9c0c5732

14
sm3.cpp
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@ -73,19 +73,18 @@ inline word32 SM3_E(word32 W0, word32 W7, word32 W13, word32 W3, word32 W10)
return P1(W0 ^ W7 ^ rotlFixed(W13, 15)) ^ rotlFixed(W3, 7) ^ W10;
}
static size_t SM3_HashMultipleBlocks_CXX(word32 *state, const word32 *input, size_t length)
static size_t SM3_HashMultipleBlocks_CXX(word32 *state, const word32 *data, size_t length)
{
CRYPTOPP_ASSERT(input);
CRYPTOPP_ASSERT(data);
word32 A = state[0], B = state[1], C = state[2], D = state[3];
word32 E = state[4], F = state[5], G = state[6], H = state[7];
size_t blocks = length / SM3::BLOCKSIZE;
for(size_t i = 0; i < blocks; ++i)
while (length >= SM3::BLOCKSIZE)
{
// Reverse bytes on LittleEndian; align pointer on BigEndian
typedef GetBlock<word32, BigEndian, false> InBlock;
InBlock iblk(input);
InBlock iblk(data);
word32 W00, W01, W02, W03, W04, W05, W06, W07, W08, W09, W10, W11, W12, W13, W14, W15;
iblk(W00)(W01)(W02)(W03)(W04)(W05)(W06)(W07)(W08)(W09)(W10)(W11)(W12)(W13)(W14)(W15);
@ -216,10 +215,11 @@ static size_t SM3_HashMultipleBlocks_CXX(word32 *state, const word32 *input, siz
G = (state[6] ^= G);
H = (state[7] ^= H);
input += SM3::BLOCKSIZE/sizeof(word32);
data += SM3::BLOCKSIZE/sizeof(word32);
length -= SM3::BLOCKSIZE;
}
return length & (SM3::BLOCKSIZE-1);
return length;
}
ANONYMOUS_NAMESPACE_END

12
sm3.h
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@ -29,23 +29,21 @@ public:
//! \param state the state of the hash
//! \details InitState sets a state array to SHA256 initial values
//! \details Hashes which derive from IteratedHashWithStaticTransform provide static
//! member functions InitState and Transform. External classes, like SEAL and MDC,
//! member functions InitState() and Transform(). External classes, like SEAL and MDC,
//! can initialize state with a user provided key and operate the hash on the data
//! with the user supplied state.
//! \note On Intel platforms the state array must be 16-byte aligned for SSE2.
static void InitState(HashWordType *state);
//! \brief Operate the hash
//! \param digest the state of the hash
//! \param data the data to be digested
//! \details Transform operates the hash on <tt>data</tt>. When the call is invoked
//! <tt>digest</tt> holds initial state. Upon return <tt>digest</tt> holds the hash
//! or updated state.
//! \details Transform() operates the hash on <tt>data</tt>. When the call is invoked
//! <tt>digest</tt> holds initial or current state. Upon return <tt>digest</tt> holds
//! the hash or updated state.
//! \details Hashes which derive from IteratedHashWithStaticTransform provide static
//! member functions InitState and Transform. External classes, like SEAL and MDC,
//! member functions InitState() and Transform(). External classes, like SEAL and MDC,
//! can initialize state with a user provided key and operate the hash on the data
//! with the user supplied state.
//! \note On Intel platforms the state array and data must be 16-byte aligned for SSE2.
static void Transform(HashWordType *digest, const HashWordType *data);
//! \brief The algorithm name