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329 lines
9.4 KiB
C
329 lines
9.4 KiB
C
#ifndef CONFIG
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#define CONFIG "config.h"
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#endif // CONFIG
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#include CONFIG
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#include "crypto.h"
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#include "endian.h"
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#include <stdint.h>
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const BYTE AesKeyV4[] = {
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0x05, 0x3D, 0x83, 0x07, 0xF9, 0xE5, 0xF0, 0x88, 0xEB, 0x5E, 0xA6, 0x68, 0x6C, 0xF0, 0x37, 0xC7, 0xE4, 0xEF, 0xD2, 0xD6};
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const BYTE AesKeyV5[] = {
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0xCD, 0x7E, 0x79, 0x6F, 0x2A, 0xB2, 0x5D, 0xCB, 0x55, 0xFF, 0xC8, 0xEF, 0x83, 0x64, 0xC4, 0x70 };
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const BYTE AesKeyV6[] = {
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0xA9, 0x4A, 0x41, 0x95, 0xE2, 0x01, 0x43, 0x2D, 0x9B, 0xCB, 0x46, 0x04, 0x05, 0xD8, 0x4A, 0x21 };
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static const BYTE SBox[] = {
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0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B,
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0xFE, 0xD7, 0xAB, 0x76, 0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0,
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0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0, 0xB7, 0xFD, 0x93, 0x26,
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0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,
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0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2,
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0xEB, 0x27, 0xB2, 0x75, 0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0,
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0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84, 0x53, 0xD1, 0x00, 0xED,
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0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,
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0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F,
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0x50, 0x3C, 0x9F, 0xA8, 0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5,
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0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2, 0xCD, 0x0C, 0x13, 0xEC,
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0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,
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0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14,
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0xDE, 0x5E, 0x0B, 0xDB, 0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C,
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0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79, 0xE7, 0xC8, 0x37, 0x6D,
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0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
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0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F,
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0x4B, 0xBD, 0x8B, 0x8A, 0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E,
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0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E, 0xE1, 0xF8, 0x98, 0x11,
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0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,
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0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F,
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0xB0, 0x54, 0xBB, 0x16
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};
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void XorBlock(const BYTE *const in, const BYTE *out) // Ensure that this is always 32 bit aligned
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{
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/*UAA64( out, 0 ) ^= UAA64( in, 0 );
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UAA64( out, 1 ) ^= UAA64( in, 1 );*/
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uint_fast8_t i;
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for (i = 0; i < AES_BLOCK_WORDS; i++)
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{
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((DWORD*)out)[i] ^= ((DWORD*)in)[i];
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}
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}
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#define AddRoundKey(d, rk) XorBlock((const BYTE *)rk, (const BYTE *)d)
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#define Mul2(word) (((word & 0x7f7f7f7f) << 1) ^ (((word & 0x80808080) >> 7) * 0x1b))
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#define Mul3(word) (Mul2(word) ^ word)
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#define Mul4(word) (Mul2(Mul2(word)))
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#define Mul8(word) (Mul2(Mul2(Mul2(word))))
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#define Mul9(word) (Mul8(word) ^ word)
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#define MulB(word) (Mul8(word) ^ Mul3(word))
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#define MulD(word) (Mul8(word) ^ Mul4(word) ^ word)
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#define MulE(word) (Mul8(word) ^ Mul4(word) ^ Mul2(word))
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//32 bit Galois Multiplication (generates bigger code than Macros)
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/*static DWORD Mul(DWORD x, DWORD y)
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{
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DWORD result = x, yTemp = y, log2;
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if (!y) return 0;
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for (log2 = 0; yTemp >>= 1; log2++ )
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{
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result = Mul2(result);
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}
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return result ^ Mul(x, y - (1 << log2));
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}*/
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void MixColumnsR(BYTE *restrict state)
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{
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uint_fast8_t i = 0;
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for (; i < AES_BLOCK_WORDS; i++)
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{
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#if defined(_CRYPTO_OPENSSL) && defined(_OPENSSL_SOFTWARE) && defined(_USE_AES_FROM_OPENSSL) //Always byte swap regardless of endianess
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DWORD word = BS32(((DWORD *) state)[i]);
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((DWORD *) state)[i] = BS32(MulE(word) ^ ROR32(MulB(word), 8) ^ ROR32(MulD(word), 16) ^ ROR32(Mul9(word), 24));
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#else
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DWORD word = LE32(((DWORD *) state)[i]);
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((DWORD *) state)[i] = LE32(MulE(word) ^ ROR32(MulB(word), 8) ^ ROR32(MulD(word), 16) ^ ROR32(Mul9(word), 24));
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#endif
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}
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}
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static DWORD SubDword(DWORD v)
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{
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BYTE *b = (BYTE *)&v;
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uint_fast8_t i = 0;
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for (; i < sizeof(DWORD); i++) b[i] = SBox[b[i]];
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return v;
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}
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void AesInitKey(AesCtx *Ctx, const BYTE *Key, int_fast8_t IsV6, int RijndaelKeyBytes)
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{
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int RijndaelKeyDwords = RijndaelKeyBytes / sizeof(DWORD);
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Ctx->rounds = (uint_fast8_t)(RijndaelKeyDwords + 6);
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static const DWORD RCon[] = {
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0x00000000, 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000,
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0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000 };
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uint_fast8_t i;
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DWORD temp;
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memcpy(Ctx->Key, Key, RijndaelKeyBytes);
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for ( i = RijndaelKeyDwords; i < ( Ctx->rounds + 1 ) << 2; i++ )
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{
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temp = Ctx->Key[ i - 1 ];
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if ( ( i % RijndaelKeyDwords ) == 0 )
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temp = BE32( SubDword( ROR32( BE32(temp), 24) ) ^ RCon[ i / RijndaelKeyDwords ] );
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Ctx->Key[ i ] = Ctx->Key[ i - RijndaelKeyDwords ] ^ temp;
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}
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if ( IsV6 )
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{
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BYTE *_p = (BYTE *)Ctx->Key;
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_p[ 4 * 16 ] ^= 0x73;
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_p[ 6 * 16 ] ^= 0x09;
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_p[ 8 * 16 ] ^= 0xE4;
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}
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}
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#if !defined(_CRYPTO_OPENSSL) || !defined(_USE_AES_FROM_OPENSSL) || defined(_OPENSSL_SOFTWARE)
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static void SubBytes(BYTE *block)
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{
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uint_fast8_t i;
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for (i = 0; i < AES_BLOCK_BYTES; i++)
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block[i] = SBox[ block[i] ];
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}
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static void ShiftRows(BYTE *state)
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{
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BYTE bIn[AES_BLOCK_BYTES];
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uint_fast8_t i;
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memcpy(bIn, state, AES_BLOCK_BYTES);
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for (i = 0; i < AES_BLOCK_BYTES; i++)
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{
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state[i] = bIn[(i + ((i & 3) << 2)) & 0xf];
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}
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};
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static void MixColumns(BYTE *state)
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{
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uint_fast8_t i = 0;
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for (; i < AES_BLOCK_WORDS; i++)
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{
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DWORD word = LE32(((DWORD *) state)[i]);
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((DWORD *) state)[i] = LE32(Mul2(word) ^ ROR32(Mul3(word), 8) ^ ROR32(word, 16) ^ ROR32(word, 24));
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}
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}
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void AesEncryptBlock(const AesCtx *const Ctx, BYTE *block)
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{
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uint_fast8_t i;
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for ( i = 0 ;; i += 4 )
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{
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AddRoundKey(block, &Ctx->Key[ i ]);
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SubBytes(block);
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ShiftRows(block);
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if ( i >= ( Ctx->rounds - 1 ) << 2 ) break;
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MixColumns(block);
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}
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AddRoundKey(block, &Ctx->Key[ Ctx->rounds << 2 ]);
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}
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void AesCmacV4(BYTE *Message, size_t MessageSize, BYTE *MacOut)
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{
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size_t i;
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BYTE mac[AES_BLOCK_BYTES];
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AesCtx Ctx;
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AesInitKey(&Ctx, AesKeyV4, FALSE, V4_KEY_BYTES);
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memset(mac, 0, sizeof(mac));
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memset(Message + MessageSize, 0, AES_BLOCK_BYTES);
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Message[MessageSize] = 0x80;
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for (i = 0; i <= MessageSize; i += AES_BLOCK_BYTES)
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{
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XorBlock(Message + i, mac);
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AesEncryptBlock(&Ctx, mac);
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}
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memcpy(MacOut, mac, AES_BLOCK_BYTES);
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}
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#endif
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#if !defined(_CRYPTO_OPENSSL) || !defined(_USE_AES_FROM_OPENSSL)
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static const BYTE SBoxR[] = {
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0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0xA3, 0x9E,
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0x81, 0xF3, 0xD7, 0xFB, 0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87,
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0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB, 0x54, 0x7B, 0x94, 0x32,
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0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E,
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0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49,
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0x6D, 0x8B, 0xD1, 0x25, 0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16,
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0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92, 0x6C, 0x70, 0x48, 0x50,
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0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84,
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0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05,
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0xB8, 0xB3, 0x45, 0x06, 0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02,
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0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B, 0x3A, 0x91, 0x11, 0x41,
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0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73,
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0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8,
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0x1C, 0x75, 0xDF, 0x6E, 0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89,
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0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B, 0xFC, 0x56, 0x3E, 0x4B,
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0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4,
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0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59,
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0x27, 0x80, 0xEC, 0x5F, 0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D,
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0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF, 0xA0, 0xE0, 0x3B, 0x4D,
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0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61,
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0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63,
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0x55, 0x21, 0x0C, 0x7D
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};
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static void ShiftRowsR(BYTE *state)
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{
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BYTE b[AES_BLOCK_BYTES];
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uint_fast8_t i;
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memcpy(b, state, AES_BLOCK_BYTES);
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for (i = 0; i < AES_BLOCK_BYTES; i++)
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state[i] = b[(i - ((i & 0x3) << 2)) & 0xf];
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}
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static void SubBytesR(BYTE *block)
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{
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uint_fast8_t i;
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for (i = 0; i < AES_BLOCK_BYTES; i++)
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block[i] = SBoxR[ block[i] ];
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}
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void AesEncryptCbc(const AesCtx *const Ctx, BYTE *restrict iv, BYTE *restrict data, size_t *restrict len)
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{
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// Pad up to blocksize inclusive
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size_t i;
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uint_fast8_t pad = (~*len & (AES_BLOCK_BYTES - 1)) + 1;
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#if defined(__GNUC__) && (__GNUC__ == 4 && __GNUC_MINOR__ == 8) // gcc 4.8 memset bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56977
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for (i = 0; i < pad; i++) data[*len + i] = pad;
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#else
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memset(data + *len, pad, pad);
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#endif
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*len += pad;
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if ( iv ) XorBlock(iv, data);
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AesEncryptBlock(Ctx, data);
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for (i = *len - AES_BLOCK_BYTES; i; i -= AES_BLOCK_BYTES)
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{
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XorBlock(data, data + AES_BLOCK_BYTES);
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data += AES_BLOCK_BYTES;
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AesEncryptBlock(Ctx, data);
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}
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}
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void AesDecryptBlock(const AesCtx *const Ctx, BYTE *block)
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{
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uint_fast8_t i;
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AddRoundKey(block, &Ctx->Key[ Ctx->rounds << 2 ]);
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for ( i = ( Ctx->rounds - 1 ) << 2 ;; i -= 4 )
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{
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ShiftRowsR(block);
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SubBytesR(block);
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AddRoundKey(block, &Ctx->Key[ i ]);
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if ( i == 0 ) break;
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MixColumnsR(block);
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}
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}
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void AesDecryptCbc(const AesCtx *const Ctx, BYTE *iv, BYTE *data, size_t len)
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{
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BYTE *cc;
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for (cc = data + len - AES_BLOCK_BYTES; cc > data; cc -= AES_BLOCK_BYTES)
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{
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AesDecryptBlock(Ctx, cc);
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XorBlock(cc - AES_BLOCK_BYTES, cc);
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}
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AesDecryptBlock(Ctx, cc);
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if ( iv ) XorBlock(iv, cc);
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}
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#endif // _CRYPTO_OPENSSL || OPENSSL_VERSION_NUMBER < 0x10000000L
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