diff options
Diffstat (limited to 'contrib/libs/openssl/crypto/bf/bf_enc.c')
| -rw-r--r-- | contrib/libs/openssl/crypto/bf/bf_enc.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/contrib/libs/openssl/crypto/bf/bf_enc.c b/contrib/libs/openssl/crypto/bf/bf_enc.c new file mode 100644 index 0000000000..423a4697a5 --- /dev/null +++ b/contrib/libs/openssl/crypto/bf/bf_enc.c @@ -0,0 +1,175 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <openssl/blowfish.h> +#include "bf_local.h" + +/* + * Blowfish as implemented from 'Blowfish: Springer-Verlag paper' (From + * LECTURE NOTES IN COMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION, CAMBRIDGE + * SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993) + */ + +#if (BF_ROUNDS != 16) && (BF_ROUNDS != 20) +# error If you set BF_ROUNDS to some value other than 16 or 20, you will have \ +to modify the code. +#endif + +void BF_encrypt(BF_LONG *data, const BF_KEY *key) +{ + register BF_LONG l, r; + register const BF_LONG *p, *s; + + p = key->P; + s = &(key->S[0]); + l = data[0]; + r = data[1]; + + l ^= p[0]; + BF_ENC(r, l, s, p[1]); + BF_ENC(l, r, s, p[2]); + BF_ENC(r, l, s, p[3]); + BF_ENC(l, r, s, p[4]); + BF_ENC(r, l, s, p[5]); + BF_ENC(l, r, s, p[6]); + BF_ENC(r, l, s, p[7]); + BF_ENC(l, r, s, p[8]); + BF_ENC(r, l, s, p[9]); + BF_ENC(l, r, s, p[10]); + BF_ENC(r, l, s, p[11]); + BF_ENC(l, r, s, p[12]); + BF_ENC(r, l, s, p[13]); + BF_ENC(l, r, s, p[14]); + BF_ENC(r, l, s, p[15]); + BF_ENC(l, r, s, p[16]); +# if BF_ROUNDS == 20 + BF_ENC(r, l, s, p[17]); + BF_ENC(l, r, s, p[18]); + BF_ENC(r, l, s, p[19]); + BF_ENC(l, r, s, p[20]); +# endif + r ^= p[BF_ROUNDS + 1]; + + data[1] = l & 0xffffffffU; + data[0] = r & 0xffffffffU; +} + +void BF_decrypt(BF_LONG *data, const BF_KEY *key) +{ + register BF_LONG l, r; + register const BF_LONG *p, *s; + + p = key->P; + s = &(key->S[0]); + l = data[0]; + r = data[1]; + + l ^= p[BF_ROUNDS + 1]; +# if BF_ROUNDS == 20 + BF_ENC(r, l, s, p[20]); + BF_ENC(l, r, s, p[19]); + BF_ENC(r, l, s, p[18]); + BF_ENC(l, r, s, p[17]); +# endif + BF_ENC(r, l, s, p[16]); + BF_ENC(l, r, s, p[15]); + BF_ENC(r, l, s, p[14]); + BF_ENC(l, r, s, p[13]); + BF_ENC(r, l, s, p[12]); + BF_ENC(l, r, s, p[11]); + BF_ENC(r, l, s, p[10]); + BF_ENC(l, r, s, p[9]); + BF_ENC(r, l, s, p[8]); + BF_ENC(l, r, s, p[7]); + BF_ENC(r, l, s, p[6]); + BF_ENC(l, r, s, p[5]); + BF_ENC(r, l, s, p[4]); + BF_ENC(l, r, s, p[3]); + BF_ENC(r, l, s, p[2]); + BF_ENC(l, r, s, p[1]); + r ^= p[0]; + + data[1] = l & 0xffffffffU; + data[0] = r & 0xffffffffU; +} + +void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length, + const BF_KEY *schedule, unsigned char *ivec, int encrypt) +{ + register BF_LONG tin0, tin1; + register BF_LONG tout0, tout1, xor0, xor1; + register long l = length; + BF_LONG tin[2]; + + if (encrypt) { + n2l(ivec, tout0); + n2l(ivec, tout1); + ivec -= 8; + for (l -= 8; l >= 0; l -= 8) { + n2l(in, tin0); + n2l(in, tin1); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + BF_encrypt(tin, schedule); + tout0 = tin[0]; + tout1 = tin[1]; + l2n(tout0, out); + l2n(tout1, out); + } + if (l != -8) { + n2ln(in, tin0, tin1, l + 8); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + BF_encrypt(tin, schedule); + tout0 = tin[0]; + tout1 = tin[1]; + l2n(tout0, out); + l2n(tout1, out); + } + l2n(tout0, ivec); + l2n(tout1, ivec); + } else { + n2l(ivec, xor0); + n2l(ivec, xor1); + ivec -= 8; + for (l -= 8; l >= 0; l -= 8) { + n2l(in, tin0); + n2l(in, tin1); + tin[0] = tin0; + tin[1] = tin1; + BF_decrypt(tin, schedule); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2n(tout0, out); + l2n(tout1, out); + xor0 = tin0; + xor1 = tin1; + } + if (l != -8) { + n2l(in, tin0); + n2l(in, tin1); + tin[0] = tin0; + tin[1] = tin1; + BF_decrypt(tin, schedule); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2nn(tout0, tout1, out, l + 8); + xor0 = tin0; + xor1 = tin1; + } + l2n(xor0, ivec); + l2n(xor1, ivec); + } + tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; + tin[0] = tin[1] = 0; +} |