/*
* Copyright 2003-2017 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
#include <limits.h>
#include <openssl/crypto.h>
#include "internal/cryptlib.h"
-#include "internal/o_str.h"
-
-int OPENSSL_memcmp(const void *v1, const void *v2, size_t n)
-{
- const unsigned char *c1 = v1, *c2 = v2;
- int ret = 0;
-
- while (n && (ret = *c1 - *c2) == 0)
- n--, c1++, c2++;
-
- return ret;
-}
char *CRYPTO_strdup(const char *str, const char* file, int line)
{
char *ret;
- size_t size;
if (str == NULL)
return NULL;
- size = strlen(str) + 1;
- ret = CRYPTO_malloc(size, file, line);
+ ret = CRYPTO_malloc(strlen(str) + 1, file, line);
if (ret != NULL)
- memcpy(ret, str, size);
+ strcpy(ret, str);
return ret;
}
/*
* Give a string of hex digits convert to a buffer
*/
-unsigned char *OPENSSL_hexstr2buf(const char *str, long *len)
+int OPENSSL_hexstr2buf_ex(unsigned char *buf, size_t buf_n, size_t *buflen,
+ const char *str)
{
- unsigned char *hexbuf, *q;
+ unsigned char *q;
unsigned char ch, cl;
int chi, cli;
const unsigned char *p;
- size_t s;
+ size_t cnt;
- s = strlen(str);
- if ((hexbuf = OPENSSL_malloc(s >> 1)) == NULL) {
- CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- for (p = (const unsigned char *)str, q = hexbuf; *p; ) {
+ for (p = (const unsigned char *)str, q = buf, cnt = 0; *p; ) {
ch = *p++;
if (ch == ':')
continue;
cl = *p++;
if (!cl) {
- CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF,
+ CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
CRYPTO_R_ODD_NUMBER_OF_DIGITS);
- OPENSSL_free(hexbuf);
- return NULL;
+ return 0;
}
cli = OPENSSL_hexchar2int(cl);
chi = OPENSSL_hexchar2int(ch);
if (cli < 0 || chi < 0) {
- OPENSSL_free(hexbuf);
- CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, CRYPTO_R_ILLEGAL_HEX_DIGIT);
- return NULL;
+ CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
+ CRYPTO_R_ILLEGAL_HEX_DIGIT);
+ return 0;
+ }
+ cnt++;
+ if (q != NULL) {
+ if (cnt > buf_n) {
+ CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
+ CRYPTO_R_TOO_SMALL_BUFFER);
+ return 0;
+ }
+ *q++ = (unsigned char)((chi << 4) | cli);
}
- *q++ = (unsigned char)((chi << 4) | cli);
}
- if (len)
- *len = q - hexbuf;
- return hexbuf;
+ if (buflen != NULL)
+ *buflen = cnt;
+ return 1;
}
-/*
- * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
- * hex representation @@@ (Contents of buffer are always kept in ASCII, also
- * on EBCDIC machines)
- */
-char *OPENSSL_buf2hexstr(const unsigned char *buffer, long len)
+unsigned char *OPENSSL_hexstr2buf(const char *str, long *buflen)
+{
+ unsigned char *buf;
+ size_t buf_n, tmp_buflen;
+
+ buf_n = strlen(str) >> 1;
+ if ((buf = OPENSSL_malloc(buf_n)) == NULL) {
+ CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ if (buflen != NULL)
+ *buflen = 0;
+ tmp_buflen = 0;
+ if (OPENSSL_hexstr2buf_ex(buf, buf_n, &tmp_buflen, str)) {
+ if (buflen != NULL)
+ *buflen = (long)tmp_buflen;
+ return buf;
+ }
+ OPENSSL_free(buf);
+ return NULL;
+}
+
+int OPENSSL_buf2hexstr_ex(char *str, size_t str_n, size_t *strlen,
+ const unsigned char *buf, size_t buflen)
{
static const char hexdig[] = "0123456789ABCDEF";
- char *tmp, *q;
const unsigned char *p;
- int i;
+ char *q;
+ size_t i;
- if (len == 0)
- {
- return OPENSSL_zalloc(1);
- }
+ if (strlen != NULL)
+ *strlen = buflen * 3;
+ if (str == NULL)
+ return 1;
- if ((tmp = OPENSSL_malloc(len * 3)) == NULL) {
- CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
- return NULL;
+ if (str_n < (unsigned long)buflen * 3) {
+ CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR_EX, CRYPTO_R_TOO_SMALL_BUFFER);
+ return 0;
}
- q = tmp;
- for (i = 0, p = buffer; i < len; i++, p++) {
+
+ q = str;
+ for (i = 0, p = buf; i < buflen; i++, p++) {
*q++ = hexdig[(*p >> 4) & 0xf];
*q++ = hexdig[*p & 0xf];
*q++ = ':';
}
q[-1] = 0;
#ifdef CHARSET_EBCDIC
- ebcdic2ascii(tmp, tmp, q - tmp - 1);
+ ebcdic2ascii(str, str, q - str - 1);
#endif
+ return 1;
+}
+
+/*
+ * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
+ * hex representation @@@ (Contents of buffer are always kept in ASCII, also
+ * on EBCDIC machines)
+ */
+char *OPENSSL_buf2hexstr(const unsigned char *buf, long buflen)
+{
+ char *tmp;
+ size_t tmp_n;
+
+ if (buflen == 0)
+ return OPENSSL_zalloc(1);
- return tmp;
+ tmp_n = buflen * 3;
+ if ((tmp = OPENSSL_malloc(tmp_n)) == NULL) {
+ CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ if (OPENSSL_buf2hexstr_ex(tmp, tmp_n, NULL, buf, buflen))
+ return tmp;
+ OPENSSL_free(tmp);
+ return NULL;
}
int openssl_strerror_r(int errnum, char *buf, size_t buflen)
#if defined(_MSC_VER) && _MSC_VER>=1400
return !strerror_s(buf, buflen, errnum);
#elif defined(_GNU_SOURCE)
- return strerror_r(errnum, buf, buflen) != NULL;
+ char *err;
+
+ /*
+ * GNU strerror_r may not actually set buf.
+ * It can return a pointer to some (immutable) static string in which case
+ * buf is left unused.
+ */
+ err = strerror_r(errnum, buf, buflen);
+ if (err == NULL || buflen == 0)
+ return 0;
+ /*
+ * If err is statically allocated, err != buf and we need to copy the data.
+ * If err points somewhere inside buf, OPENSSL_strlcpy can handle this,
+ * since src and dest are not annotated with __restrict and the function
+ * reads src byte for byte and writes to dest.
+ * If err == buf we do not have to copy anything.
+ */
+ if (err != buf)
+ OPENSSL_strlcpy(buf, err, buflen);
+ return 1;
#elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \
(defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
/*
return !strerror_r(errnum, buf, buflen);
#else
char *err;
+
/* Fall back to non-thread safe strerror()...its all we can do */
if (buflen < 2)
return 0;
/* Can this ever happen? */
if (err == NULL)
return 0;
- strncpy(buf, err, buflen - 1);
- buf[buflen - 1] = '\0';
+ OPENSSL_strlcpy(buf, err, buflen);
return 1;
#endif
}
projects / openssl.git / blobdiff