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author | William Joye <wjoye@cfa.harvard.edu> | 2017-05-02 16:41:35 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2017-05-02 16:41:35 (GMT) |
commit | 3d328008deedc58cd7a11c79063cefa7d662d4fc (patch) | |
tree | cb41a048885ce7b493f406360cf5f6edf689c468 /openssl/crypto/des/cfb64ede.c | |
parent | 0a2b8b8e0bc2e91a9f10659b30e2e4f5b79ce692 (diff) | |
download | blt-3d328008deedc58cd7a11c79063cefa7d662d4fc.zip blt-3d328008deedc58cd7a11c79063cefa7d662d4fc.tar.gz blt-3d328008deedc58cd7a11c79063cefa7d662d4fc.tar.bz2 |
inital commit
Diffstat (limited to 'openssl/crypto/des/cfb64ede.c')
-rw-r--r-- | openssl/crypto/des/cfb64ede.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/openssl/crypto/des/cfb64ede.c b/openssl/crypto/des/cfb64ede.c new file mode 100644 index 0000000..5d709c1 --- /dev/null +++ b/openssl/crypto/des/cfb64ede.c @@ -0,0 +1,249 @@ +/* crypto/des/cfb64ede.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include "des_locl.h" +#include "e_os.h" + +/* + * The input and output encrypted as though 64bit cfb mode is being used. + * The extra state information to record how much of the 64bit block we have + * used is contained in *num; + */ + +void DES_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out, + long length, DES_key_schedule *ks1, + DES_key_schedule *ks2, DES_key_schedule *ks3, + DES_cblock *ivec, int *num, int enc) +{ + register DES_LONG v0, v1; + register long l = length; + register int n = *num; + DES_LONG ti[2]; + unsigned char *iv, c, cc; + + iv = &(*ivec)[0]; + if (enc) { + while (l--) { + if (n == 0) { + c2l(iv, v0); + c2l(iv, v1); + + ti[0] = v0; + ti[1] = v1; + DES_encrypt3(ti, ks1, ks2, ks3); + v0 = ti[0]; + v1 = ti[1]; + + iv = &(*ivec)[0]; + l2c(v0, iv); + l2c(v1, iv); + iv = &(*ivec)[0]; + } + c = *(in++) ^ iv[n]; + *(out++) = c; + iv[n] = c; + n = (n + 1) & 0x07; + } + } else { + while (l--) { + if (n == 0) { + c2l(iv, v0); + c2l(iv, v1); + + ti[0] = v0; + ti[1] = v1; + DES_encrypt3(ti, ks1, ks2, ks3); + v0 = ti[0]; + v1 = ti[1]; + + iv = &(*ivec)[0]; + l2c(v0, iv); + l2c(v1, iv); + iv = &(*ivec)[0]; + } + cc = *(in++); + c = iv[n]; + iv[n] = cc; + *(out++) = c ^ cc; + n = (n + 1) & 0x07; + } + } + v0 = v1 = ti[0] = ti[1] = c = cc = 0; + *num = n; +} + +#ifdef undef /* MACRO */ +void DES_ede2_cfb64_encrypt(unsigned char *in, unsigned char *out, + long length, DES_key_schedule ks1, + DES_key_schedule ks2, DES_cblock (*ivec), + int *num, int enc) +{ + DES_ede3_cfb64_encrypt(in, out, length, ks1, ks2, ks1, ivec, num, enc); +} +#endif + +/* + * This is compatible with the single key CFB-r for DES, even thought that's + * not what EVP needs. + */ + +void DES_ede3_cfb_encrypt(const unsigned char *in, unsigned char *out, + int numbits, long length, DES_key_schedule *ks1, + DES_key_schedule *ks2, DES_key_schedule *ks3, + DES_cblock *ivec, int enc) +{ + register DES_LONG d0, d1, v0, v1; + register unsigned long l = length, n = ((unsigned int)numbits + 7) / 8; + register int num = numbits, i; + DES_LONG ti[2]; + unsigned char *iv; + unsigned char ovec[16]; + + if (num > 64) + return; + iv = &(*ivec)[0]; + c2l(iv, v0); + c2l(iv, v1); + if (enc) { + while (l >= n) { + l -= n; + ti[0] = v0; + ti[1] = v1; + DES_encrypt3(ti, ks1, ks2, ks3); + c2ln(in, d0, d1, n); + in += n; + d0 ^= ti[0]; + d1 ^= ti[1]; + l2cn(d0, d1, out, n); + out += n; + /* + * 30-08-94 - eay - changed because l>>32 and l<<32 are bad under + * gcc :-( + */ + if (num == 32) { + v0 = v1; + v1 = d0; + } else if (num == 64) { + v0 = d0; + v1 = d1; + } else { + iv = &ovec[0]; + l2c(v0, iv); + l2c(v1, iv); + l2c(d0, iv); + l2c(d1, iv); + /* shift ovec left most of the bits... */ + memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0)); + /* now the remaining bits */ + if (num % 8 != 0) + for (i = 0; i < 8; ++i) { + ovec[i] <<= num % 8; + ovec[i] |= ovec[i + 1] >> (8 - num % 8); + } + iv = &ovec[0]; + c2l(iv, v0); + c2l(iv, v1); + } + } + } else { + while (l >= n) { + l -= n; + ti[0] = v0; + ti[1] = v1; + DES_encrypt3(ti, ks1, ks2, ks3); + c2ln(in, d0, d1, n); + in += n; + /* + * 30-08-94 - eay - changed because l>>32 and l<<32 are bad under + * gcc :-( + */ + if (num == 32) { + v0 = v1; + v1 = d0; + } else if (num == 64) { + v0 = d0; + v1 = d1; + } else { + iv = &ovec[0]; + l2c(v0, iv); + l2c(v1, iv); + l2c(d0, iv); + l2c(d1, iv); + /* shift ovec left most of the bits... */ + memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0)); + /* now the remaining bits */ + if (num % 8 != 0) + for (i = 0; i < 8; ++i) { + ovec[i] <<= num % 8; + ovec[i] |= ovec[i + 1] >> (8 - num % 8); + } + iv = &ovec[0]; + c2l(iv, v0); + c2l(iv, v1); + } + d0 ^= ti[0]; + d1 ^= ti[1]; + l2cn(d0, d1, out, n); + out += n; + } + } + iv = &(*ivec)[0]; + l2c(v0, iv); + l2c(v1, iv); + v0 = v1 = d0 = d1 = ti[0] = ti[1] = 0; +} |