diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libcrypto/des/cbc_enc.c | 76 |
1 files changed, 73 insertions, 3 deletions
diff --git a/lib/libcrypto/des/cbc_enc.c b/lib/libcrypto/des/cbc_enc.c index 6c1ec7117db..1f11cc3600c 100644 --- a/lib/libcrypto/des/cbc_enc.c +++ b/lib/libcrypto/des/cbc_enc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: cbc_enc.c,v 1.4 2023/07/08 07:11:07 beck Exp $ */ +/* $OpenBSD: cbc_enc.c,v 1.5 2024/08/31 14:25:04 jsing Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * @@ -56,6 +56,76 @@ * [including the GNU Public Licence.] */ -#define CBC_ENC_C__DONT_UPDATE_IV +#include "des_local.h" -#include "ncbc_enc.c" /* des_cbc_encrypt */ +void +DES_cbc_encrypt(const unsigned char *in, unsigned char *out, long length, + DES_key_schedule *_schedule, DES_cblock *ivec, int enc) +{ + DES_LONG tin0, tin1; + DES_LONG tout0, tout1, xor0, xor1; + long l = length; + DES_LONG tin[2]; + unsigned char *iv; + + iv = &(*ivec)[0]; + + if (enc) { + c2l(iv, tout0); + c2l(iv, tout1); + for (l -= 8; l >= 0; l -= 8) { + c2l(in, tin0); + c2l(in, tin1); + tin0 ^= tout0; + tin[0] = tin0; + tin1 ^= tout1; + tin[1] = tin1; + DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT); + tout0 = tin[0]; + l2c(tout0, out); + tout1 = tin[1]; + l2c(tout1, out); + } + if (l != -8) { + c2ln(in, tin0, tin1, l + 8); + tin0 ^= tout0; + tin[0] = tin0; + tin1 ^= tout1; + tin[1] = tin1; + DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT); + tout0 = tin[0]; + l2c(tout0, out); + tout1 = tin[1]; + l2c(tout1, out); + } + } else { + c2l(iv, xor0); + c2l(iv, xor1); + for (l -= 8; l >= 0; l -= 8) { + c2l(in, tin0); + tin[0] = tin0; + c2l(in, tin1); + tin[1] = tin1; + DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2c(tout0, out); + l2c(tout1, out); + xor0 = tin0; + xor1 = tin1; + } + if (l != -8) { + c2l(in, tin0); + tin[0] = tin0; + c2l(in, tin1); + tin[1] = tin1; + DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2cn(tout0, tout1, out, l + 8); + } + } + tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; + tin[0] = tin[1] = 0; +} +LCRYPTO_ALIAS(DES_cbc_encrypt); |