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/*
//
// Purpose:
// Cryptography Primitive.
// Message block processing according to SHA256
//
// Contents:
// UpdateSHA256()
//
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcphash.h"
#include "pcptool.h"
#if !defined(_ENABLE_ALG_SHA256_) && !defined(_ENABLE_ALG_SHA224_)
#pragma message("IPP_ALG_HASH_SHA256 disabled")
#else
#pragma message("IPP_ALG_HASH_SHA256 enabled")
#if !((_IPP==_IPP_M5) || \
(_IPP==_IPP_W7) || (_IPP==_IPP_T7) || \
(_IPP==_IPP_V8) || (_IPP==_IPP_P8) || \
(_IPP==_IPP_S8) || (_IPP>=_IPP_G9) || \
(_IPP32E==_IPP32E_M7) || \
(_IPP32E==_IPP32E_U8) || (_IPP32E==_IPP32E_Y8) || \
(_IPP32E==_IPP32E_N8) || (_IPP32E>=_IPP32E_E9))
/*
// SHA256 Specific Macros (reference proposal 256-384-512)
*/
#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define SUM0(x) (ROR32((x), 2) ^ ROR32((x),13) ^ ROR32((x),22))
#define SUM1(x) (ROR32((x), 6) ^ ROR32((x),11) ^ ROR32((x),25))
#define SIG0(x) (ROR32((x), 7) ^ ROR32((x),18) ^ LSR32((x), 3))
#define SIG1(x) (ROR32((x),17) ^ ROR32((x),19) ^ LSR32((x),10))
#define SHA256_UPDATE(i) \
wdat[i & 15] += SIG1(wdat[(i+14)&15]) + wdat[(i+9)&15] + SIG0(wdat[(i+1)&15])
#define SHA256_STEP(i,j) \
v[(7 - i) & 7] += (j ? SHA256_UPDATE(i) : wdat[i&15]) \
+ SHA256_cnt_loc[i + j] \
+ SUM1(v[(4-i)&7]) \
+ CH(v[(4-i)&7], v[(5-i)&7], v[(6-i)&7]); \
v[(3-i)&7] += v[(7-i)&7]; \
v[(7-i)&7] += SUM0(v[(0-i)&7]) + MAJ(v[(0-i)&7], v[(1-i)&7], v[(2-i)&7])
#define COMPACT_SHA256_STEP(A,B,C,D,E,F,G,H, W,K, r) { \
Ipp32u _T1 = (H) + SUM1((E)) + CH((E),(F),(G)) + (W)[(r)] + (K)[(r)]; \
Ipp32u _T2 = SUM0((A)) + MAJ((A),(B),(C)); \
(H) = (G); \
(G) = (F); \
(F) = (E); \
(E) = (D)+_T1; \
(D) = (C); \
(C) = (B); \
(B) = (A); \
(A) = _T1+_T2; \
}
/*F*
// Name: UpdateSHA256
//
// Purpose: Update internal hash according to input message stream.
//
// Parameters:
// uniHash pointer to in/out hash
// mblk pointer to message stream
// mlen message stream length (multiple by message block size)
// uniParam pointer to the optional parameter
//
*F*/
#if defined(_ALG_SHA256_COMPACT_)
#pragma message("SHA256 compact")
void UpdateSHA256(void* uniHash, const Ipp8u* mblk, int mlen, const void* uniParam)
{
Ipp32u* data = (Ipp32u*)mblk;
Ipp32u* digest = (Ipp32u*)uniHash;
Ipp32u* SHA256_cnt_loc = (Ipp32u*)uniParam;
for(; mlen>=MBS_SHA256; data += MBS_SHA256/sizeof(Ipp32u), mlen -= MBS_SHA256) {
int t;
/*
// expand message block
*/
Ipp32u W[64];
/* initialize the first 16 words in the array W (remember about endian) */
for(t=0; t<16; t++) {
#if (IPP_ENDIAN == IPP_BIG_ENDIAN)
W[t] = data[t];
#else
W[t] = ENDIANNESS( data[t] );
#endif
}
for(; t<64; t++)
W[t] = SIG1(W[t-2]) + W[t-7] + SIG0(W[t-15]) + W[t-16];
/*
// update hash
*/
{
/* init A, B, C, D, E, F, G, H by the input hash */
Ipp32u A = digest[0];
Ipp32u B = digest[1];
Ipp32u C = digest[2];
Ipp32u D = digest[3];
Ipp32u E = digest[4];
Ipp32u F = digest[5];
Ipp32u G = digest[6];
Ipp32u H = digest[7];
for(t=0; t<64; t++)
COMPACT_SHA256_STEP(A,B,C,D,E,F,G,H, W,SHA256_cnt_loc, t);
/* update hash*/
digest[0] += A;
digest[1] += B;
digest[2] += C;
digest[3] += D;
digest[4] += E;
digest[5] += F;
digest[6] += G;
digest[7] += H;
}
}
}
#else
void UpdateSHA256(void* uniHash, const Ipp8u* mblk, int mlen, const void* uniParam)
{
Ipp32u* data = (Ipp32u*)mblk;
Ipp32u* digest = (Ipp32u*)uniHash;
Ipp32u* SHA256_cnt_loc = (Ipp32u*)uniParam;
for(; mlen>=MBS_SHA256; data += MBS_SHA256/sizeof(Ipp32u), mlen -= MBS_SHA256) {
Ipp32u wdat[16];
int j;
/* copy digest */
Ipp32u v[8];
CopyBlock(digest, v, IPP_SHA256_DIGEST_BITSIZE/BYTESIZE);
/* initialize the first 16 words in the array W (remember about endian) */
for(j=0; j<16; j++) {
#if (IPP_ENDIAN == IPP_BIG_ENDIAN)
wdat[j] = data[j];
#else
wdat[j] = ENDIANNESS( data[j] );
#endif
}
for(j=0; j<64; j+=16) {
SHA256_STEP( 0, j);
SHA256_STEP( 1, j);
SHA256_STEP( 2, j);
SHA256_STEP( 3, j);
SHA256_STEP( 4, j);
SHA256_STEP( 5, j);
SHA256_STEP( 6, j);
SHA256_STEP( 7, j);
SHA256_STEP( 8, j);
SHA256_STEP( 9, j);
SHA256_STEP(10, j);
SHA256_STEP(11, j);
SHA256_STEP(12, j);
SHA256_STEP(13, j);
SHA256_STEP(14, j);
SHA256_STEP(15, j);
}
/* update digest */
digest[0] += v[0];
digest[1] += v[1];
digest[2] += v[2];
digest[3] += v[3];
digest[4] += v[4];
digest[5] += v[5];
digest[6] += v[6];
digest[7] += v[7];
}
}
#endif
#endif
#endif /* IPP_ALG_HASH_SHA256 */