[331] | 1 | /*
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| 2 | * Copyright 2003-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <ctype.h>
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| 11 | #include <limits.h>
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| 12 | #include <e_os.h>
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| 13 | #include <openssl/crypto.h>
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| 14 | #include "internal/cryptlib.h"
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| 15 | #include "internal/o_str.h"
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| 16 |
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| 17 | int OPENSSL_memcmp(const void *v1, const void *v2, size_t n)
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| 18 | {
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| 19 | const unsigned char *c1 = v1, *c2 = v2;
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| 20 | int ret = 0;
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| 21 |
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| 22 | while (n && (ret = *c1 - *c2) == 0)
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| 23 | n--, c1++, c2++;
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| 24 |
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| 25 | return ret;
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| 26 | }
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| 27 |
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| 28 | char *CRYPTO_strdup(const char *str, const char* file, int line)
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| 29 | {
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| 30 | char *ret;
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| 31 | size_t size;
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| 32 |
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| 33 | if (str == NULL)
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| 34 | return NULL;
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| 35 | size = strlen(str) + 1;
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| 36 | ret = CRYPTO_malloc(size, file, line);
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| 37 | if (ret != NULL)
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| 38 | memcpy(ret, str, size);
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| 39 | return ret;
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| 40 | }
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| 41 |
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| 42 | char *CRYPTO_strndup(const char *str, size_t s, const char* file, int line)
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| 43 | {
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| 44 | size_t maxlen;
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| 45 | char *ret;
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| 46 |
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| 47 | if (str == NULL)
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| 48 | return NULL;
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| 49 |
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| 50 | maxlen = OPENSSL_strnlen(str, s);
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| 51 |
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| 52 | ret = CRYPTO_malloc(maxlen + 1, file, line);
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| 53 | if (ret) {
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| 54 | memcpy(ret, str, maxlen);
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| 55 | ret[maxlen] = '\0';
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| 56 | }
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| 57 | return ret;
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| 58 | }
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| 59 |
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| 60 | void *CRYPTO_memdup(const void *data, size_t siz, const char* file, int line)
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| 61 | {
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| 62 | void *ret;
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| 63 |
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| 64 | if (data == NULL || siz >= INT_MAX)
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| 65 | return NULL;
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| 66 |
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| 67 | ret = CRYPTO_malloc(siz, file, line);
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| 68 | if (ret == NULL) {
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| 69 | CRYPTOerr(CRYPTO_F_CRYPTO_MEMDUP, ERR_R_MALLOC_FAILURE);
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| 70 | return NULL;
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| 71 | }
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| 72 | return memcpy(ret, data, siz);
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| 73 | }
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| 74 |
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| 75 | size_t OPENSSL_strnlen(const char *str, size_t maxlen)
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| 76 | {
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| 77 | const char *p;
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| 78 |
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| 79 | for (p = str; maxlen-- != 0 && *p != '\0'; ++p) ;
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| 80 |
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| 81 | return p - str;
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| 82 | }
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| 83 |
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| 84 | size_t OPENSSL_strlcpy(char *dst, const char *src, size_t size)
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| 85 | {
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| 86 | size_t l = 0;
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| 87 | for (; size > 1 && *src; size--) {
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| 88 | *dst++ = *src++;
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| 89 | l++;
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| 90 | }
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| 91 | if (size)
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| 92 | *dst = '\0';
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| 93 | return l + strlen(src);
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| 94 | }
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| 95 |
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| 96 | size_t OPENSSL_strlcat(char *dst, const char *src, size_t size)
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| 97 | {
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| 98 | size_t l = 0;
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| 99 | for (; size > 0 && *dst; size--, dst++)
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| 100 | l++;
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| 101 | return l + OPENSSL_strlcpy(dst, src, size);
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| 102 | }
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| 103 |
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| 104 | int OPENSSL_hexchar2int(unsigned char c)
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| 105 | {
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| 106 | #ifdef CHARSET_EBCDIC
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| 107 | c = os_toebcdic[c];
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| 108 | #endif
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| 109 |
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| 110 | switch (c) {
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| 111 | case '0':
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| 112 | return 0;
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| 113 | case '1':
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| 114 | return 1;
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| 115 | case '2':
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| 116 | return 2;
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| 117 | case '3':
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| 118 | return 3;
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| 119 | case '4':
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| 120 | return 4;
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| 121 | case '5':
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| 122 | return 5;
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| 123 | case '6':
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| 124 | return 6;
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| 125 | case '7':
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| 126 | return 7;
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| 127 | case '8':
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| 128 | return 8;
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| 129 | case '9':
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| 130 | return 9;
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| 131 | case 'a': case 'A':
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| 132 | return 0x0A;
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| 133 | case 'b': case 'B':
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| 134 | return 0x0B;
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| 135 | case 'c': case 'C':
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| 136 | return 0x0C;
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| 137 | case 'd': case 'D':
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| 138 | return 0x0D;
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| 139 | case 'e': case 'E':
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| 140 | return 0x0E;
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| 141 | case 'f': case 'F':
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| 142 | return 0x0F;
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| 143 | }
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| 144 | return -1;
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| 145 | }
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| 146 |
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| 147 | /*
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| 148 | * Give a string of hex digits convert to a buffer
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| 149 | */
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| 150 | unsigned char *OPENSSL_hexstr2buf(const char *str, long *len)
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| 151 | {
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| 152 | unsigned char *hexbuf, *q;
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| 153 | unsigned char ch, cl;
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| 154 | int chi, cli;
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| 155 | const unsigned char *p;
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| 156 | size_t s;
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| 157 |
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| 158 | s = strlen(str);
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| 159 | if ((hexbuf = OPENSSL_malloc(s >> 1)) == NULL) {
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| 160 | CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
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| 161 | return NULL;
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| 162 | }
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| 163 | for (p = (const unsigned char *)str, q = hexbuf; *p; ) {
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| 164 | ch = *p++;
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| 165 | if (ch == ':')
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| 166 | continue;
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| 167 | cl = *p++;
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| 168 | if (!cl) {
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| 169 | CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF,
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| 170 | CRYPTO_R_ODD_NUMBER_OF_DIGITS);
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| 171 | OPENSSL_free(hexbuf);
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| 172 | return NULL;
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| 173 | }
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| 174 | cli = OPENSSL_hexchar2int(cl);
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| 175 | chi = OPENSSL_hexchar2int(ch);
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| 176 | if (cli < 0 || chi < 0) {
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| 177 | OPENSSL_free(hexbuf);
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| 178 | CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, CRYPTO_R_ILLEGAL_HEX_DIGIT);
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| 179 | return NULL;
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| 180 | }
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| 181 | *q++ = (unsigned char)((chi << 4) | cli);
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| 182 | }
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| 183 |
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| 184 | if (len)
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| 185 | *len = q - hexbuf;
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| 186 | return hexbuf;
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| 187 | }
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| 188 |
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| 189 | /*
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| 190 | * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
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| 191 | * hex representation @@@ (Contents of buffer are always kept in ASCII, also
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| 192 | * on EBCDIC machines)
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| 193 | */
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| 194 | char *OPENSSL_buf2hexstr(const unsigned char *buffer, long len)
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| 195 | {
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| 196 | const static char hexdig[] = "0123456789ABCDEF";
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| 197 | char *tmp, *q;
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| 198 | const unsigned char *p;
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| 199 | int i;
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| 200 |
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| 201 | if (len == 0)
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| 202 | {
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| 203 | return OPENSSL_zalloc(1);
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| 204 | }
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| 205 |
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| 206 | if ((tmp = OPENSSL_malloc(len * 3)) == NULL) {
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| 207 | CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
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| 208 | return NULL;
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| 209 | }
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| 210 | q = tmp;
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| 211 | for (i = 0, p = buffer; i < len; i++, p++) {
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| 212 | *q++ = hexdig[(*p >> 4) & 0xf];
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| 213 | *q++ = hexdig[*p & 0xf];
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| 214 | *q++ = ':';
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| 215 | }
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| 216 | q[-1] = 0;
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| 217 | #ifdef CHARSET_EBCDIC
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| 218 | ebcdic2ascii(tmp, tmp, q - tmp - 1);
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| 219 | #endif
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| 220 |
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| 221 | return tmp;
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| 222 | }
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| 223 |
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| 224 | int openssl_strerror_r(int errnum, char *buf, size_t buflen)
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| 225 | {
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| 226 | #if defined(_MSC_VER) && _MSC_VER>=1400
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| 227 | return !strerror_s(buf, buflen, errnum);
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| 228 | #elif defined(_GNU_SOURCE)
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| 229 | return strerror_r(errnum, buf, buflen) != NULL;
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| 230 | #elif (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
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| 231 | /*
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| 232 | * We can use "real" strerror_r. The OpenSSL version differs in that it
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| 233 | * gives 1 on success and 0 on failure for consistency with other OpenSSL
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| 234 | * functions. Real strerror_r does it the other way around
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| 235 | */
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| 236 | return !strerror_r(errnum, buf, buflen);
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| 237 | #else
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| 238 | char *err;
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| 239 | /* Fall back to non-thread safe strerror()...its all we can do */
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| 240 | if (buflen < 2)
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| 241 | return 0;
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| 242 | err = strerror(errnum);
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| 243 | /* Can this ever happen? */
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| 244 | if (err == NULL)
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| 245 | return 0;
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| 246 | strncpy(buf, err, buflen - 1);
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| 247 | buf[buflen - 1] = '\0';
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| 248 | return 1;
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| 249 | #endif
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| 250 | }
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