diff options
Diffstat (limited to 'CryptoPP/mars.cpp')
-rw-r--r-- | CryptoPP/mars.cpp | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/CryptoPP/mars.cpp b/CryptoPP/mars.cpp deleted file mode 100644 index fe9b1186a..000000000 --- a/CryptoPP/mars.cpp +++ /dev/null @@ -1,154 +0,0 @@ -// mars.cpp - written and placed in the public domain by Wei Dai - -// includes IBM's key setup "tweak" proposed in August 1999 (http://www.research.ibm.com/security/key-setup.txt) - -#include "pch.h" -#include "mars.h" -#include "misc.h" - -NAMESPACE_BEGIN(CryptoPP) - -void MARS::Base::UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &) -{ - AssertValidKeyLength(length); - - // Initialize T[] with the key data - FixedSizeSecBlock<word32, 15> T; - GetUserKey(LITTLE_ENDIAN_ORDER, T.begin(), 15, userKey, length); - T[length/4] = length/4; - - for (unsigned int j=0; j<4; j++) // compute 10 words of K[] in each iteration - { - unsigned int i; - // Do linear transformation - for (i=0; i<15; i++) - T[i] = T[i] ^ rotlFixed(T[(i+8)%15] ^ T[(i+13)%15], 3) ^ (4*i+j); - - // Do four rounds of stirring - for (unsigned int k=0; k<4; k++) - for (i=0; i<15; i++) - T[i] = rotlFixed(T[i] + Sbox[T[(i+14)%15]%512], 9); - - // Store next 10 key words into K[] - for (i=0; i<10; i++) - m_k[10*j+i] = T[4*i%15]; - } - - // Modify multiplication key-words - for(unsigned int i = 5; i < 37; i += 2) - { - word32 m, w = m_k[i] | 3; - m = (~w ^ (w<<1)) & (~w ^ (w>>1)) & 0x7ffffffe; - m &= m>>1; m &= m>>2; m &= m>>4; - m |= m<<1; m |= m<<2; m |= m<<4; - m &= 0x7ffffffc; - w ^= rotlMod(Sbox[265 + (m_k[i] & 3)], m_k[i-1]) & m; - m_k[i] = w; - } -} - -#define S(a) Sbox[(a)&0x1ff] -#define S0(a) Sbox[(a)&0xff] -#define S1(a) Sbox[((a)&0xff) + 256] - -typedef BlockGetAndPut<word32, LittleEndian> Block; - -void MARS::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - unsigned int i; - word32 a, b, c, d, l, m, r, t; - const word32 *k = m_k; - - Block::Get(inBlock)(a)(b)(c)(d); - - a += k[0]; b += k[1]; c += k[2]; d += k[3]; - - for (i=0; i<8; i++) - { - b = (b ^ S0(a)) + S1(a>>8); - c += S0(a>>16); - a = rotrFixed(a, 24); - d ^= S1(a); - a += (i%4==0) ? d : 0; - a += (i%4==1) ? b : 0; - t = a; a = b; b = c; c = d; d = t; - } - - for (i=0; i<16; i++) - { - t = rotlFixed(a, 13); - r = rotlFixed(t * k[2*i+5], 10); - m = a + k[2*i+4]; - l = rotlMod((S(m) ^ rotrFixed(r, 5) ^ r), r); - c += rotlMod(m, rotrFixed(r, 5)); - (i<8 ? b : d) += l; - (i<8 ? d : b) ^= r; - a = b; b = c; c = d; d = t; - } - - for (i=0; i<8; i++) - { - a -= (i%4==2) ? d : 0; - a -= (i%4==3) ? b : 0; - b ^= S1(a); - c -= S0(a>>24); - t = rotlFixed(a, 24); - d = (d - S1(a>>16)) ^ S0(t); - a = b; b = c; c = d; d = t; - } - - a -= k[36]; b -= k[37]; c -= k[38]; d -= k[39]; - - Block::Put(xorBlock, outBlock)(a)(b)(c)(d); -} - -void MARS::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - unsigned int i; - word32 a, b, c, d, l, m, r, t; - const word32 *k = m_k; - - Block::Get(inBlock)(d)(c)(b)(a); - - d += k[36]; c += k[37]; b += k[38]; a += k[39]; - - for (i=0; i<8; i++) - { - b = (b ^ S0(a)) + S1(a>>8); - c += S0(a>>16); - a = rotrFixed(a, 24); - d ^= S1(a); - a += (i%4==0) ? d : 0; - a += (i%4==1) ? b : 0; - t = a; a = b; b = c; c = d; d = t; - } - - for (i=0; i<16; i++) - { - t = rotrFixed(a, 13); - r = rotlFixed(a * k[35-2*i], 10); - m = t + k[34-2*i]; - l = rotlMod((S(m) ^ rotrFixed(r, 5) ^ r), r); - c -= rotlMod(m, rotrFixed(r, 5)); - (i<8 ? b : d) -= l; - (i<8 ? d : b) ^= r; - a = b; b = c; c = d; d = t; - } - - for (i=0; i<8; i++) - { - a -= (i%4==2) ? d : 0; - a -= (i%4==3) ? b : 0; - b ^= S1(a); - c -= S0(a>>24); - t = rotlFixed(a, 24); - d = (d - S1(a>>16)) ^ S0(t); - a = b; b = c; c = d; d = t; - } - - d -= k[0]; c -= k[1]; b -= k[2]; a -= k[3]; - - Block::Put(xorBlock, outBlock)(d)(c)(b)(a); -} - -NAMESPACE_END |