| /* 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 <string.h> |
| |
| #include <openssl/des.h> |
| |
| #include "../../crypto/des/internal.h" |
| #include "../../crypto/internal.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 uint8_t *in, uint8_t *out, |
| long length, DES_key_schedule *ks1, |
| DES_key_schedule *ks2, DES_key_schedule *ks3, |
| DES_cblock *ivec, int *num, int enc) { |
| uint32_t v0, v1; |
| long l = length; |
| int n = *num; |
| uint32_t ti[2]; |
| uint8_t *iv, c, cc; |
| |
| iv = ivec->bytes; |
| 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->bytes; |
| l2c(v0, iv); |
| l2c(v1, iv); |
| iv = ivec->bytes; |
| } |
| 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->bytes; |
| l2c(v0, iv); |
| l2c(v1, iv); |
| iv = ivec->bytes; |
| } |
| 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; |
| } |
| |
| /* 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 uint8_t *in, uint8_t *out, int numbits, |
| long length, DES_key_schedule *ks1, |
| DES_key_schedule *ks2, DES_key_schedule *ks3, |
| DES_cblock *ivec, int enc) { |
| uint32_t d0, d1, v0, v1; |
| unsigned long l = length, n = ((unsigned int)numbits + 7) / 8; |
| int num = numbits, i; |
| uint32_t ti[2]; |
| uint8_t *iv; |
| uint8_t ovec[16]; |
| |
| if (num > 64) { |
| return; |
| }; |
| |
| iv = ivec->bytes; |
| 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... */ |
| OPENSSL_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... */ |
| OPENSSL_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->bytes; |
| l2c(v0, iv); |
| l2c(v1, iv); |
| v0 = v1 = d0 = d1 = ti[0] = ti[1] = 0; |
| } |