| Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/cast/c_cfb64.c |
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| 1 | /* $OpenBSD: c_cfb64.c,v 1.5 2014/10/28 07:35:58 jsg Exp $ */ | - | ||||||
| 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/cast.h> | - | ||||||
| 60 | #include "cast_lcl.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 CAST_cfb64_encrypt(const unsigned char *in, unsigned char *out, | - | ||||||
| 68 | long length, const CAST_KEY *schedule, unsigned char *ivec, | - | ||||||
| 69 | int *num, int enc) | - | ||||||
| 70 | { | - | ||||||
| 71 | CAST_LONG v0,v1,t; | - | ||||||
| 72 | int n= *num; | - | ||||||
| 73 | long l=length; | - | ||||||
| 74 | CAST_LONG ti[2]; | - | ||||||
| 75 | unsigned char *iv,c,cc; | - | ||||||
| 76 | - | |||||||
| 77 | iv=ivec; | - | ||||||
| 78 | if (enc)
| 2 | ||||||
| 79 | { | - | ||||||
| 80 | while (l--)
| 2-1776 | ||||||
| 81 | { | - | ||||||
| 82 | if (n == 0)
| 222-1554 | ||||||
| 83 | { | - | ||||||
| 84 | n2l(iv,v0); ti[0]=v0; | - | ||||||
| 85 | n2l(iv,v1); ti[1]=v1; | - | ||||||
| 86 | CAST_encrypt((CAST_LONG *)ti,schedule); | - | ||||||
| 87 | iv=ivec; | - | ||||||
| 88 | t=ti[0]; l2n(t,iv); | - | ||||||
| 89 | t=ti[1]; l2n(t,iv); | - | ||||||
| 90 | iv=ivec; | - | ||||||
| 91 | } executed 222 times by 1 test: end of blockExecuted by:
| 222 | ||||||
| 92 | c= *(in++)^iv[n]; | - | ||||||
| 93 | *(out++)=c; | - | ||||||
| 94 | iv[n]=c; | - | ||||||
| 95 | n=(n+1)&0x07; | - | ||||||
| 96 | } executed 1776 times by 1 test: end of blockExecuted by:
| 1776 | ||||||
| 97 | } executed 2 times by 1 test: end of blockExecuted by:
| 2 | ||||||
| 98 | else | - | ||||||
| 99 | { | - | ||||||
| 100 | while (l--)
| 2-1776 | ||||||
| 101 | { | - | ||||||
| 102 | if (n == 0)
| 222-1554 | ||||||
| 103 | { | - | ||||||
| 104 | n2l(iv,v0); ti[0]=v0; | - | ||||||
| 105 | n2l(iv,v1); ti[1]=v1; | - | ||||||
| 106 | CAST_encrypt((CAST_LONG *)ti,schedule); | - | ||||||
| 107 | iv=ivec; | - | ||||||
| 108 | t=ti[0]; l2n(t,iv); | - | ||||||
| 109 | t=ti[1]; l2n(t,iv); | - | ||||||
| 110 | iv=ivec; | - | ||||||
| 111 | } executed 222 times by 1 test: end of blockExecuted by:
| 222 | ||||||
| 112 | cc= *(in++); | - | ||||||
| 113 | c=iv[n]; | - | ||||||
| 114 | iv[n]=cc; | - | ||||||
| 115 | *(out++)=c^cc; | - | ||||||
| 116 | n=(n+1)&0x07; | - | ||||||
| 117 | } executed 1776 times by 1 test: end of blockExecuted by:
| 1776 | ||||||
| 118 | } executed 2 times by 1 test: end of blockExecuted by:
| 2 | ||||||
| 119 | v0=v1=ti[0]=ti[1]=t=c=cc=0; | - | ||||||
| 120 | *num=n; | - | ||||||
| 121 | } executed 4 times by 1 test: end of blockExecuted by:
| 4 | ||||||
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