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Diffstat (limited to 'src/Crypto/GostCipher.c')
| -rw-r--r-- | src/Crypto/GostCipher.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/src/Crypto/GostCipher.c b/src/Crypto/GostCipher.c deleted file mode 100644 index ddd649cd..00000000 --- a/src/Crypto/GostCipher.c +++ /dev/null @@ -1,265 +0,0 @@ -/** @file -GOST89 implementation - -Copyright (c) 2016. Disk Cryptography Services for EFI (DCS), Alex Kolotnikov - -This program and the accompanying materials -are licensed and made available under the terms and conditions -of the Apache License, Version 2.0. -The full text of the license may be found at -https://opensource.org/licenses/Apache-2.0 - -Dynamic SBOX idea is from GostCrypt project. Copyright (c) 2008-2011 TrueCrypt Developers Association -**/ - - - -#include "GostCipher.h" -#include "Streebog.h" -#include "cpu.h" - -#if defined(CIPHER_GOST89) - -// Crypto Pro -byte S_CryptoPro[8][16] = { - {0x1,0x3,0xA,0x9,0x5,0xB,0x4,0xF,0x8,0x6,0x7,0xE,0xD,0x0,0x2,0xC}, - {0xD,0xE,0x4,0x1,0x7,0x0,0x5,0xA,0x3,0xC,0x8,0xF,0x6,0x2,0x9,0xB}, - {0x7,0x6,0x2,0x4,0xD,0x9,0xF,0x0,0xA,0x1,0x5,0xB,0x8,0xE,0xC,0x3}, - {0x7,0x6,0x4,0xB,0x9,0xC,0x2,0xA,0x1,0x8,0x0,0xE,0xF,0xD,0x3,0x5}, - {0x4,0xA,0x7,0xC,0x0,0xF,0x2,0x8,0xE,0x1,0x6,0x5,0xD,0xB,0x9,0x3}, - {0x7,0xF,0xC,0xE,0x9,0x4,0x1,0x0,0x3,0xB,0x5,0x2,0x6,0xA,0x8,0xD}, - {0x5,0xF,0x4,0x0,0x2,0xD,0xB,0x9,0x1,0x7,0x6,0x3,0xC,0xE,0xA,0x8}, - {0xA,0x4,0x5,0x6,0x8,0x1,0x3,0x7,0xD,0xC,0xE,0x0,0x9,0x2,0xB,0xF} - }; - -// TC26 -byte S_TC26[8][16] = -{ - { 0xc, 0x4, 0x6, 0x2, 0xa, 0x5, 0xb, 0x9, 0xe, 0x8, 0xd, 0x7, 0x0, 0x3, 0xf, 0x1 }, - { 0x6, 0x8, 0x2, 0x3, 0x9, 0xa, 0x5, 0xc, 0x1, 0xe, 0x4, 0x7, 0xb, 0xd, 0x0, 0xf }, - { 0xb, 0x3, 0x5, 0x8, 0x2, 0xf, 0xa, 0xd, 0xe, 0x1, 0x7, 0x4, 0xc, 0x9, 0x6, 0x0 }, - { 0xc, 0x8, 0x2, 0x1, 0xd, 0x4, 0xf, 0x6, 0x7, 0x0, 0xa, 0x5, 0x3, 0xe, 0x9, 0xb }, - { 0x7, 0xf, 0x5, 0xa, 0x8, 0x1, 0x6, 0xd, 0x0, 0x9, 0x3, 0xe, 0xb, 0x4, 0x2, 0xc }, - { 0x5, 0xd, 0xf, 0x6, 0x9, 0x2, 0xc, 0xa, 0xb, 0x7, 0x8, 0x1, 0x4, 0x3, 0xe, 0x0 }, - { 0x8, 0xe, 0x2, 0x5, 0x6, 0x9, 0x1, 0xc, 0xf, 0x4, 0xb, 0x0, 0xd, 0xa, 0x3, 0x7 }, - { 0x1, 0x7, 0xe, 0xd, 0x0, 0x5, 0x8, 0x3, 0x4, 0xf, 0xa, 0x6, 0x9, 0xc, 0xb, 0x2 }, -}; - -void gost_prepare_kds(gost_kds* kds) { - uint32 i; - // Build substitution tables. - for (i = 0; i < 256; ++i) { - uint32 p; - p = kds->sbox[7][i >> 4] << 4 | kds->sbox[6][i & 15]; - p = p << 24; p = p << 11 | p >> 21; - kds->sbox_cvt[i] = p; // S87 - - p = kds->sbox[5][i >> 4] << 4 | kds->sbox[4][i & 15]; - p = p << 16; p = p << 11 | p >> 21; - kds->sbox_cvt[256 + i] = p; // S65 - - p = kds->sbox[3][i >> 4] << 4 | kds->sbox[2][i & 15]; - p = p << 8; p = p << 11 | p >> 21; - kds->sbox_cvt[256 * 2 + i] = p; // S43 - - p = kds->sbox[1][i >> 4] << 4 | kds->sbox[0][i & 15]; - p = p << 11 | p >> 21; - kds->sbox_cvt[256 * 3 + i] = p; // S21 - } -} - - -static void xor_s_box(byte s_box[8][16], byte *seed) -{ - int i; - for (i = 0; i < 16; i++) - { - s_box[0][i] ^= (seed[ (i * 4) + 0 ] ) & 0xF; - s_box[1][i] ^= (seed[ (i * 4) + 0 ]>>4) & 0xF; - s_box[2][i] ^= (seed[ (i * 4) + 1 ] ) & 0xF; - s_box[3][i] ^= (seed[ (i * 4) + 1 ]>>4) & 0xF; - s_box[4][i] ^= (seed[ (i * 4) + 2 ] ) & 0xF; - s_box[5][i] ^= (seed[ (i * 4) + 2 ]>>4) & 0xF; - s_box[6][i] ^= (seed[ (i * 4) + 3 ] ) & 0xF; - s_box[7][i] ^= (seed[ (i * 4) + 3 ]>>4) & 0xF; - } -} - -void gost_set_key(const byte *key, gost_kds *ks, int useDynamicSbox) -{ - memcpy(ks->key, key, GOST_KEYSIZE); - memcpy(ks->sbox, S_TC26, sizeof(ks->sbox)); - - if (useDynamicSbox) - { - STREEBOG_CTX sctx; - byte sbox_seed[64]; -#if defined (DEVICE_DRIVER) && !defined (_WIN64) - KFLOATING_SAVE floatingPointState; - NTSTATUS saveStatus = STATUS_INVALID_PARAMETER; - if (HasSSE2() || HasSSE41()) - saveStatus = KeSaveFloatingPointState (&floatingPointState); -#endif - //Generate pseudorandom data based on the key - STREEBOG_init(&sctx); - STREEBOG_add(&sctx, ks->key, 32); - STREEBOG_finalize(&sctx, sbox_seed); - -#if defined (DEVICE_DRIVER) && !defined (_WIN64) - if (NT_SUCCESS (saveStatus)) - KeRestoreFloatingPointState (&floatingPointState); -#endif - - xor_s_box(ks->sbox, sbox_seed); - } - - gost_prepare_kds(ks); -} - -static uint32 f(uint32 v, uint32* sbox){ - byte* x =(byte*) &v; - /* Do substitutions */ - return sbox[x[3]] | sbox[256 + x[2]] | sbox[256*2 + x[1]] | sbox[256*3 + x[0]]; -} - -void gost_encrypt_block(uint64 in_, uint64* out_, gost_kds* kds) { - uint32* in = (uint32*)&in_; - uint32* out = (uint32*)out_; - uint32* key = (uint32*)kds->key; - uint32* sbox = kds->sbox_cvt; - - // As named in the GOST - uint32 n1 = in[0]; - uint32 n2 = in[1]; - - n2 ^= f(n1+key[0], sbox); - n1 ^= f(n2+key[1], sbox); - n2 ^= f(n1+key[2], sbox); - n1 ^= f(n2+key[3], sbox); - n2 ^= f(n1+key[4], sbox); - n1 ^= f(n2+key[5], sbox); - n2 ^= f(n1+key[6], sbox); - n1 ^= f(n2+key[7], sbox); - - n2 ^= f(n1+key[0], sbox); - n1 ^= f(n2+key[1], sbox); - n2 ^= f(n1+key[2], sbox); - n1 ^= f(n2+key[3], sbox); - n2 ^= f(n1+key[4], sbox); - n1 ^= f(n2+key[5], sbox); - n2 ^= f(n1+key[6], sbox); - n1 ^= f(n2+key[7], sbox); - - n2 ^= f(n1+key[0], sbox); - n1 ^= f(n2+key[1], sbox); - n2 ^= f(n1+key[2], sbox); - n1 ^= f(n2+key[3], sbox); - n2 ^= f(n1+key[4], sbox); - n1 ^= f(n2+key[5], sbox); - n2 ^= f(n1+key[6], sbox); - n1 ^= f(n2+key[7], sbox); - - n2 ^= f(n1+key[7], sbox); - n1 ^= f(n2+key[6], sbox); - n2 ^= f(n1+key[5], sbox); - n1 ^= f(n2+key[4], sbox); - n2 ^= f(n1+key[3], sbox); - n1 ^= f(n2+key[2], sbox); - n2 ^= f(n1+key[1], sbox); - n1 ^= f(n2+key[0], sbox); - - // There is no swap after the last round - out[0] = n2; - out[1] = n1; -} - -void gost_decrypt_block(uint64 in_, uint64* out_, gost_kds* kds) { - uint32* in = (uint32*)&in_; - uint32* out = (uint32*)out_; - uint32* key = (uint32*)kds->key; - uint32* sbox = kds->sbox_cvt; - - // As named in the GOST - uint32 n1 = in[0]; - uint32 n2 = in[1]; - - n2 ^= f(n1+key[0], sbox); - n1 ^= f(n2+key[1], sbox); - n2 ^= f(n1+key[2], sbox); - n1 ^= f(n2+key[3], sbox); - n2 ^= f(n1+key[4], sbox); - n1 ^= f(n2+key[5], sbox); - n2 ^= f(n1+key[6], sbox); - n1 ^= f(n2+key[7], sbox); - - n2 ^= f(n1+key[7], sbox); - n1 ^= f(n2+key[6], sbox); - n2 ^= f(n1+key[5], sbox); - n1 ^= f(n2+key[4], sbox); - n2 ^= f(n1+key[3], sbox); - n1 ^= f(n2+key[2], sbox); - n2 ^= f(n1+key[1], sbox); - n1 ^= f(n2+key[0], sbox); - - n2 ^= f(n1+key[7], sbox); - n1 ^= f(n2+key[6], sbox); - n2 ^= f(n1+key[5], sbox); - n1 ^= f(n2+key[4], sbox); - n2 ^= f(n1+key[3], sbox); - n1 ^= f(n2+key[2], sbox); - n2 ^= f(n1+key[1], sbox); - n1 ^= f(n2+key[0], sbox); - - n2 ^= f(n1+key[7], sbox); - n1 ^= f(n2+key[6], sbox); - n2 ^= f(n1+key[5], sbox); - n1 ^= f(n2+key[4], sbox); - n2 ^= f(n1+key[3], sbox); - n1 ^= f(n2+key[2], sbox); - n2 ^= f(n1+key[1], sbox); - n1 ^= f(n2+key[0], sbox); - - out[0] = n2; - out[1] = n1; -} - -#if defined(_M_AMD64) -void gost_encrypt_128_CBC_asm(const byte *in, byte *out, gost_kds *ks, uint64 count); -void gost_decrypt_128_CBC_asm(const byte *in, byte *out, gost_kds *ks, uint64 count); -#endif - -void gost_encrypt(const byte *in, byte *out, gost_kds *ks, int count) { -#if defined(_M_AMD64) - gost_encrypt_128_CBC_asm(in, out, ks, (uint64)count); -#else - while (count > 0) { - // encrypt two blocks in CBC mode - gost_encrypt_block(*((uint64*)in), (uint64*)out, ks); - *((gst_udword*)(out + 8)) = *((gst_udword*)(in + 8)) ^ *((gst_udword*)(out)); - *((gst_udword*)(out + 12)) = *((gst_udword*)(in + 12)) ^ *((gst_udword*)(out + 4)); - gost_encrypt_block(*((uint64*)(out + 8)), (uint64*)(out + 8), ks); - count--; - in += 16; - out += 16; - } -#endif -} - -void gost_decrypt(const byte *in, byte *out, gost_kds *ks, int count) { -#if defined(_M_AMD64) - gost_decrypt_128_CBC_asm(in, out, ks, (uint64)count); -#else - while (count > 0) { - // decrypt two blocks in CBC mode - gost_decrypt_block(*((uint64*)(in + 8)), (uint64*)(out + 8), ks); - *((gst_udword*)(out + 8)) ^= *((gst_udword*)(in));; - *((gst_udword*)(out + 12)) ^= *((gst_udword*)(in + 4));; - gost_decrypt_block(*((uint64*)(in)), (uint64*)(out), ks); - count--; - in += 16; - out += 16; - } -#endif -} - -#endif |