diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/des/pcbc_enc.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/des/pcbc_enc.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/des/pcbc_enc.c b/openssl-1.1.0h/crypto/des/pcbc_enc.c new file mode 100644 index 0000000..0fa058f --- /dev/null +++ b/openssl-1.1.0h/crypto/des/pcbc_enc.c @@ -0,0 +1,66 @@ +/* + * 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 "des_locl.h" + +void DES_pcbc_encrypt(const unsigned char *input, unsigned char *output, + long length, DES_key_schedule *schedule, + DES_cblock *ivec, int enc) +{ + register DES_LONG sin0, sin1, xor0, xor1, tout0, tout1; + DES_LONG tin[2]; + const unsigned char *in; + unsigned char *out, *iv; + + in = input; + out = output; + iv = &(*ivec)[0]; + + if (enc) { + c2l(iv, xor0); + c2l(iv, xor1); + for (; length > 0; length -= 8) { + if (length >= 8) { + c2l(in, sin0); + c2l(in, sin1); + } else + c2ln(in, sin0, sin1, length); + tin[0] = sin0 ^ xor0; + tin[1] = sin1 ^ xor1; + DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT); + tout0 = tin[0]; + tout1 = tin[1]; + xor0 = sin0 ^ tout0; + xor1 = sin1 ^ tout1; + l2c(tout0, out); + l2c(tout1, out); + } + } else { + c2l(iv, xor0); + c2l(iv, xor1); + for (; length > 0; length -= 8) { + c2l(in, sin0); + c2l(in, sin1); + tin[0] = sin0; + tin[1] = sin1; + DES_encrypt1((DES_LONG *)tin, schedule, DES_DECRYPT); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + if (length >= 8) { + l2c(tout0, out); + l2c(tout1, out); + } else + l2cn(tout0, tout1, out, length); + xor0 = tout0 ^ sin0; + xor1 = tout1 ^ sin1; + } + } + tin[0] = tin[1] = 0; + sin0 = sin1 = xor0 = xor1 = tout0 = tout1 = 0; +} |