static void twofish_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) { struct twofish_ctx *ctx = crypto_tfm_ctx(tfm); const __le32 *src = (const __le32 *)in; __le32 *dst = (__le32 *)out; /* */ u32 a, b, c, d; /* */ u32 x, y; /* */ INPACK (0, c, 4); INPACK (1, d, 5); INPACK (2, a, 6); INPACK (3, b, 7); /* */ DECCYCLE (7); DECCYCLE (6); DECCYCLE (5); DECCYCLE (4); DECCYCLE (3); DECCYCLE (2); DECCYCLE (1); DECCYCLE (0); /* */ OUTUNPACK (0, a, 0); OUTUNPACK (1, b, 1); OUTUNPACK (2, c, 2); OUTUNPACK (3, d, 3); }
void Twofish::decrypt(const byte* inBlock, const byte* xorBlock, byte* outBlock) const { word32 x, y, a, b, c, d; gpBlock::Get(inBlock)(c)(d)(a)(b); c ^= k_[4]; d ^= k_[5]; a ^= k_[6]; b ^= k_[7]; const word32 *k = k_+8; DECCYCLE (7); DECCYCLE (6); DECCYCLE (5); DECCYCLE (4); DECCYCLE (3); DECCYCLE (2); DECCYCLE (1); DECCYCLE (0); a ^= k_[0]; b ^= k_[1]; c ^= k_[2]; d ^= k_[3]; gpBlock::Put(xorBlock, outBlock)(a)(b)(c)(d); }
/* Decrypt one block. in and out may be the same. */ static void twofish_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) { struct twofish_ctx *ctx = crypto_tfm_ctx(tfm); const __le32 *src = (const __le32 *)in; __le32 *dst = (__le32 *)out; /* The four 32-bit chunks of the text. */ u32 a, b, c, d; /* Temporaries used by the round function. */ u32 x, y; /* Input whitening and packing. */ INPACK (0, c, 4); INPACK (1, d, 5); INPACK (2, a, 6); INPACK (3, b, 7); /* Encryption Feistel cycles. */ DECCYCLE (7); DECCYCLE (6); DECCYCLE (5); DECCYCLE (4); DECCYCLE (3); DECCYCLE (2); DECCYCLE (1); DECCYCLE (0); /* Output whitening and unpacking. */ OUTUNPACK (0, a, 0); OUTUNPACK (1, b, 1); OUTUNPACK (2, c, 2); OUTUNPACK (3, d, 3); }
static void do_twofish_decrypt (const TWOFISH_context *ctx, byte *out, const byte *in) { /* The four 32-bit chunks of the text. */ u32 a, b, c, d; /* Temporaries used by the round function. */ u32 x, y; /* Input whitening and packing. */ INPACK (0, c, 4); INPACK (1, d, 5); INPACK (2, a, 6); INPACK (3, b, 7); /* Encryption Feistel cycles. */ DECCYCLE (7); DECCYCLE (6); DECCYCLE (5); DECCYCLE (4); DECCYCLE (3); DECCYCLE (2); DECCYCLE (1); DECCYCLE (0); /* Output whitening and unpacking. */ OUTUNPACK (0, a, 0); OUTUNPACK (1, b, 1); OUTUNPACK (2, c, 2); OUTUNPACK (3, d, 3); }