6286757141
Reviewed-by: Richard Levitte <levitte@openssl.org>
260 lines
5.8 KiB
C
260 lines
5.8 KiB
C
/*
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* Copyright 2003-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <ctype.h>
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#include <limits.h>
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#include <e_os.h>
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#include <openssl/crypto.h>
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#include "internal/cryptlib.h"
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#include "internal/o_str.h"
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#if !defined(OPENSSL_IMPLEMENTS_strncasecmp) && \
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!defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_SYS_WINCE) && \
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!defined(NETWARE_CLIB)
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# include <strings.h>
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#endif
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int OPENSSL_strncasecmp(const char *str1, const char *str2, size_t n)
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{
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#if defined(OPENSSL_IMPLEMENTS_strncasecmp)
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while (*str1 && *str2 && n) {
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int res = toupper(*str1) - toupper(*str2);
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if (res)
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return res < 0 ? -1 : 1;
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str1++;
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str2++;
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n--;
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}
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if (n == 0)
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return 0;
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if (*str1)
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return 1;
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if (*str2)
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return -1;
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return 0;
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#else
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/*
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* Recursion hazard warning! Whenever strncasecmp is #defined as
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* OPENSSL_strncasecmp, OPENSSL_IMPLEMENTS_strncasecmp must be defined as
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* well.
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*/
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return strncasecmp(str1, str2, n);
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#endif
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}
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int OPENSSL_strcasecmp(const char *str1, const char *str2)
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{
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#if defined(OPENSSL_IMPLEMENTS_strncasecmp)
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return OPENSSL_strncasecmp(str1, str2, (size_t)-1);
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#else
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return strcasecmp(str1, str2);
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#endif
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}
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int OPENSSL_memcmp(const void *v1, const void *v2, size_t n)
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{
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const unsigned char *c1 = v1, *c2 = v2;
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int ret = 0;
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while (n && (ret = *c1 - *c2) == 0)
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n--, c1++, c2++;
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return ret;
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}
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char *CRYPTO_strdup(const char *str, const char* file, int line)
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{
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char *ret;
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size_t size;
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if (str == NULL)
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return NULL;
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size = strlen(str) + 1;
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ret = CRYPTO_malloc(size, file, line);
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if (ret != NULL)
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memcpy(ret, str, size);
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return ret;
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}
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char *CRYPTO_strndup(const char *str, size_t s, const char* file, int line)
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{
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size_t maxlen;
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char *ret;
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if (str == NULL)
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return NULL;
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maxlen = OPENSSL_strnlen(str, s);
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ret = CRYPTO_malloc(maxlen + 1, file, line);
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if (ret) {
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memcpy(ret, str, maxlen);
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ret[maxlen] = '\0';
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}
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return ret;
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}
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void *CRYPTO_memdup(const void *data, size_t siz, const char* file, int line)
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{
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void *ret;
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if (data == NULL || siz >= INT_MAX)
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return NULL;
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ret = CRYPTO_malloc(siz, file, line);
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if (ret == NULL) {
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CRYPTOerr(CRYPTO_F_CRYPTO_MEMDUP, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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return memcpy(ret, data, siz);
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}
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size_t OPENSSL_strnlen(const char *str, size_t maxlen)
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{
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const char *p;
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for (p = str; maxlen-- != 0 && *p != '\0'; ++p) ;
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return p - str;
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}
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size_t OPENSSL_strlcpy(char *dst, const char *src, size_t size)
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{
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size_t l = 0;
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for (; size > 1 && *src; size--) {
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*dst++ = *src++;
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l++;
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}
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if (size)
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*dst = '\0';
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return l + strlen(src);
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}
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size_t OPENSSL_strlcat(char *dst, const char *src, size_t size)
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{
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size_t l = 0;
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for (; size > 0 && *dst; size--, dst++)
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l++;
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return l + OPENSSL_strlcpy(dst, src, size);
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}
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int OPENSSL_hexchar2int(unsigned char c)
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{
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#ifdef CHARSET_EBCDIC
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c = os_toebcdic[c];
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#endif
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switch (c) {
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case '0':
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return 0;
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case '1':
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return 1;
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case '2':
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return 2;
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case '3':
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return 3;
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case '4':
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return 4;
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case '5':
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return 5;
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case '6':
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return 6;
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case '7':
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return 7;
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case '8':
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return 8;
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case '9':
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return 9;
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case 'a': case 'A':
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return 0x0A;
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case 'b': case 'B':
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return 0x0B;
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case 'c': case 'C':
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return 0x0C;
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case 'd': case 'D':
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return 0x0D;
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case 'e': case 'E':
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return 0x0E;
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case 'f': case 'F':
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return 0x0F;
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}
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return -1;
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}
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/*
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* Give a string of hex digits convert to a buffer
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*/
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unsigned char *OPENSSL_hexstr2buf(const char *str, long *len)
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{
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unsigned char *hexbuf, *q;
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unsigned char ch, cl;
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int chi, cli;
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const unsigned char *p;
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size_t s;
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s = strlen(str);
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if ((hexbuf = OPENSSL_malloc(s >> 1)) == NULL) {
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CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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for (p = (const unsigned char *)str, q = hexbuf; *p; ) {
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ch = *p++;
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if (ch == ':')
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continue;
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cl = *p++;
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if (!cl) {
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CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF,
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CRYPTO_R_ODD_NUMBER_OF_DIGITS);
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OPENSSL_free(hexbuf);
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return NULL;
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}
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cli = OPENSSL_hexchar2int(cl);
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chi = OPENSSL_hexchar2int(ch);
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if (cli < 0 || chi < 0) {
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OPENSSL_free(hexbuf);
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CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, CRYPTO_R_ILLEGAL_HEX_DIGIT);
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return NULL;
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}
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*q++ = (unsigned char)((chi << 4) | cli);
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}
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if (len)
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*len = q - hexbuf;
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return hexbuf;
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}
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/*
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* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
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* hex representation @@@ (Contents of buffer are always kept in ASCII, also
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* on EBCDIC machines)
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*/
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char *OPENSSL_buf2hexstr(const unsigned char *buffer, long len)
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{
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const static char hexdig[] = "0123456789ABCDEF";
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char *tmp, *q;
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const unsigned char *p;
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int i;
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if ((tmp = OPENSSL_malloc(len * 3 + 1)) == NULL) {
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CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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q = tmp;
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for (i = 0, p = buffer; i < len; i++, p++) {
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*q++ = hexdig[(*p >> 4) & 0xf];
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*q++ = hexdig[*p & 0xf];
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*q++ = ':';
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}
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q[-1] = 0;
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#ifdef CHARSET_EBCDIC
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ebcdic2ascii(tmp, tmp, q - tmp - 1);
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#endif
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return tmp;
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}
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