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| 1 /* crypto/rc2/rc2cfb64.c */ | |
| 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * This package is an SSL implementation written | |
| 6 * by Eric Young (eay@cryptsoft.com). | |
| 7 * The implementation was written so as to conform with Netscapes SSL. | |
| 8 * | |
| 9 * This library is free for commercial and non-commercial use as long as | |
| 10 * the following conditions are aheared to. The following conditions | |
| 11 * apply to all code found in this distribution, be it the RC4, RSA, | |
| 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
| 13 * included with this distribution is covered by the same copyright terms | |
| 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
| 15 * | |
| 16 * Copyright remains Eric Young's, and as such any Copyright notices in | |
| 17 * the code are not to be removed. | |
| 18 * If this package is used in a product, Eric Young should be given attribution | |
| 19 * as the author of the parts of the library used. | |
| 20 * This can be in the form of a textual message at program startup or | |
| 21 * in documentation (online or textual) provided with the package. | |
| 22 * | |
| 23 * Redistribution and use in source and binary forms, with or without | |
| 24 * modification, are permitted provided that the following conditions | |
| 25 * are met: | |
| 26 * 1. Redistributions of source code must retain the copyright | |
| 27 * notice, this list of conditions and the following disclaimer. | |
| 28 * 2. Redistributions in binary form must reproduce the above copyright | |
| 29 * notice, this list of conditions and the following disclaimer in the | |
| 30 * documentation and/or other materials provided with the distribution. | |
| 31 * 3. All advertising materials mentioning features or use of this software | |
| 32 * must display the following acknowledgement: | |
| 33 * "This product includes cryptographic software written by | |
| 34 * Eric Young (eay@cryptsoft.com)" | |
| 35 * The word 'cryptographic' can be left out if the rouines from the library | |
| 36 * being used are not cryptographic related :-). | |
| 37 * 4. If you include any Windows specific code (or a derivative thereof) from | |
| 38 * the apps directory (application code) you must include an acknowledgement: | |
| 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
| 40 * | |
| 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
| 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 51 * SUCH DAMAGE. | |
| 52 * | |
| 53 * The licence and distribution terms for any publically available version or | |
| 54 * derivative of this code cannot be changed. i.e. this code cannot simply be | |
| 55 * copied and put under another distribution licence | |
| 56 * [including the GNU Public Licence.] | |
| 57 */ | |
| 58 | |
| 59 #include <openssl/rc2.h> | |
| 60 #include "rc2_locl.h" | |
| 61 | |
| 62 /* The input and output encrypted as though 64bit cfb mode is being | |
| 63 * used. The extra state information to record how much of the | |
| 64 * 64bit block we have used is contained in *num; | |
| 65 */ | |
| 66 | |
| 67 void RC2_cfb64_encrypt(const unsigned char *in, unsigned char *out, | |
| 68 long length, RC2_KEY *schedule, unsigned char *ivec, | |
| 69 int *num, int encrypt) | |
| 70 { | |
| 71 register unsigned long v0,v1,t; | |
| 72 register int n= *num; | |
| 73 register long l=length; | |
| 74 unsigned long ti[2]; | |
| 75 unsigned char *iv,c,cc; | |
| 76 | |
| 77 iv=(unsigned char *)ivec; | |
| 78 if (encrypt) | |
| 79 { | |
| 80 while (l--) | |
| 81 { | |
| 82 if (n == 0) | |
| 83 { | |
| 84 c2l(iv,v0); ti[0]=v0; | |
| 85 c2l(iv,v1); ti[1]=v1; | |
| 86 RC2_encrypt((unsigned long *)ti,schedule); | |
| 87 iv=(unsigned char *)ivec; | |
| 88 t=ti[0]; l2c(t,iv); | |
| 89 t=ti[1]; l2c(t,iv); | |
| 90 iv=(unsigned char *)ivec; | |
| 91 } | |
| 92 c= *(in++)^iv[n]; | |
| 93 *(out++)=c; | |
| 94 iv[n]=c; | |
| 95 n=(n+1)&0x07; | |
| 96 } | |
| 97 } | |
| 98 else | |
| 99 { | |
| 100 while (l--) | |
| 101 { | |
| 102 if (n == 0) | |
| 103 { | |
| 104 c2l(iv,v0); ti[0]=v0; | |
| 105 c2l(iv,v1); ti[1]=v1; | |
| 106 RC2_encrypt((unsigned long *)ti,schedule); | |
| 107 iv=(unsigned char *)ivec; | |
| 108 t=ti[0]; l2c(t,iv); | |
| 109 t=ti[1]; l2c(t,iv); | |
| 110 iv=(unsigned char *)ivec; | |
| 111 } | |
| 112 cc= *(in++); | |
| 113 c=iv[n]; | |
| 114 iv[n]=cc; | |
| 115 *(out++)=c^cc; | |
| 116 n=(n+1)&0x07; | |
| 117 } | |
| 118 } | |
| 119 v0=v1=ti[0]=ti[1]=t=c=cc=0; | |
| 120 *num=n; | |
| 121 } | |
| 122 | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master