| Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/bn/bn_mpi.c |
| Source code | Switch to Preprocessed file |
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| 1 | /* $OpenBSD: bn_mpi.c,v 1.8 2017/01/29 17:49:22 beck 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 <stdio.h> | - | ||||||
| 60 | - | |||||||
| 61 | #include <openssl/err.h> | - | ||||||
| 62 | - | |||||||
| 63 | #include "bn_lcl.h" | - | ||||||
| 64 | - | |||||||
| 65 | int | - | ||||||
| 66 | BN_bn2mpi(const BIGNUM *a, unsigned char *d) | - | ||||||
| 67 | { | - | ||||||
| 68 | int bits; | - | ||||||
| 69 | int num = 0; | - | ||||||
| 70 | int ext = 0; | - | ||||||
| 71 | long l; | - | ||||||
| 72 | - | |||||||
| 73 | bits = BN_num_bits(a); | - | ||||||
| 74 | num = (bits + 7) / 8; | - | ||||||
| 75 | if (bits > 0) {
| 0 | ||||||
| 76 | ext = ((bits & 0x07) == 0); | - | ||||||
| 77 | } never executed: end of block | 0 | ||||||
| 78 | if (d == NULL)
| 0 | ||||||
| 79 | return (num + 4 + ext); never executed: return (num + 4 + ext); | 0 | ||||||
| 80 | - | |||||||
| 81 | l = num + ext; | - | ||||||
| 82 | d[0] = (unsigned char)(l >> 24) & 0xff; | - | ||||||
| 83 | d[1] = (unsigned char)(l >> 16) & 0xff; | - | ||||||
| 84 | d[2] = (unsigned char)(l >> 8) & 0xff; | - | ||||||
| 85 | d[3] = (unsigned char)(l) & 0xff; | - | ||||||
| 86 | if (ext)
| 0 | ||||||
| 87 | d[4] = 0; never executed: d[4] = 0; | 0 | ||||||
| 88 | num = BN_bn2bin(a, &(d[4 + ext])); | - | ||||||
| 89 | if (a->neg)
| 0 | ||||||
| 90 | d[4] |= 0x80; never executed: d[4] |= 0x80; | 0 | ||||||
| 91 | return (num + 4 + ext); never executed: return (num + 4 + ext); | 0 | ||||||
| 92 | } | - | ||||||
| 93 | - | |||||||
| 94 | BIGNUM * | - | ||||||
| 95 | BN_mpi2bn(const unsigned char *d, int n, BIGNUM *a) | - | ||||||
| 96 | { | - | ||||||
| 97 | long len; | - | ||||||
| 98 | int neg = 0; | - | ||||||
| 99 | - | |||||||
| 100 | if (n < 4) {
| 0 | ||||||
| 101 | BNerror(BN_R_INVALID_LENGTH); | - | ||||||
| 102 | return (NULL); never executed: return ( ((void *)0) ); | 0 | ||||||
| 103 | } | - | ||||||
| 104 | len = ((long)d[0] << 24) | ((long)d[1] << 16) | ((int)d[2] << 8) | | - | ||||||
| 105 | (int)d[3]; | - | ||||||
| 106 | if ((len + 4) != n) {
| 0 | ||||||
| 107 | BNerror(BN_R_ENCODING_ERROR); | - | ||||||
| 108 | return (NULL); never executed: return ( ((void *)0) ); | 0 | ||||||
| 109 | } | - | ||||||
| 110 | - | |||||||
| 111 | if (a == NULL)
| 0 | ||||||
| 112 | a = BN_new(); never executed: a = BN_new(); | 0 | ||||||
| 113 | if (a == NULL)
| 0 | ||||||
| 114 | return (NULL); never executed: return ( ((void *)0) ); | 0 | ||||||
| 115 | - | |||||||
| 116 | if (len == 0) {
| 0 | ||||||
| 117 | a->neg = 0; | - | ||||||
| 118 | a->top = 0; | - | ||||||
| 119 | return (a); never executed: return (a); | 0 | ||||||
| 120 | } | - | ||||||
| 121 | d += 4; | - | ||||||
| 122 | if ((*d) & 0x80)
| 0 | ||||||
| 123 | neg = 1; never executed: neg = 1; | 0 | ||||||
| 124 | if (BN_bin2bn(d, (int)len, a) == NULL)
| 0 | ||||||
| 125 | return (NULL); never executed: return ( ((void *)0) ); | 0 | ||||||
| 126 | a->neg = neg; | - | ||||||
| 127 | if (neg) {
| 0 | ||||||
| 128 | BN_clear_bit(a, BN_num_bits(a) - 1); | - | ||||||
| 129 | } never executed: end of block | 0 | ||||||
| 130 | bn_check_top(a); | - | ||||||
| 131 | return (a); never executed: return (a); | 0 | ||||||
| 132 | } | - | ||||||
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