/src/openssl/crypto/o_str.c

Source (jump to first uncovered line)
/*
 * Copyright 2003-2024 The OpenSSL Project Authors. All Rights Reserved.
 *
 * 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 "e_os.h"
#include <string.h>
#include <limits.h>
#include <openssl/crypto.h>
#include "crypto/ctype.h"
#include "internal/cryptlib.h"
#include "internal/thread_once.h"

#define DEFAULT_SEPARATOR ':'
#define CH_ZERO '\0'

char *CRYPTO_strdup(const char *str, const char* file, int line)
{
    char *ret;

    if (str == NULL)
        return NULL;
    ret = CRYPTO_malloc(strlen(str) + 1, file, line);
    if (ret != NULL)
        strcpy(ret, str);
    return ret;
}

char *CRYPTO_strndup(const char *str, size_t s, const char* file, int line)
{
    size_t maxlen;
    char *ret;

    if (str == NULL)
        return NULL;

    maxlen = OPENSSL_strnlen(str, s);

    ret = CRYPTO_malloc(maxlen + 1, file, line);
    if (ret) {
        memcpy(ret, str, maxlen);
        ret[maxlen] = CH_ZERO;
    }
    return ret;
}

void *CRYPTO_memdup(const void *data, size_t siz, const char* file, int line)
{
    void *ret;

    if (data == NULL || siz >= INT_MAX)
        return NULL;

    ret = CRYPTO_malloc(siz, file, line);
    if (ret == NULL) {
        ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    return memcpy(ret, data, siz);
}

size_t OPENSSL_strnlen(const char *str, size_t maxlen)
{
    const char *p;

    for (p = str; maxlen-- != 0 && *p != CH_ZERO; ++p) ;

    return p - str;
}

size_t OPENSSL_strlcpy(char *dst, const char *src, size_t size)
{
    size_t l = 0;
    for (; size > 1 && *src; size--) {
        *dst++ = *src++;
        l++;
    }
    if (size)
        *dst = CH_ZERO;
    return l + strlen(src);
}

size_t OPENSSL_strlcat(char *dst, const char *src, size_t size)
{
    size_t l = 0;
    for (; size > 0 && *dst; size--, dst++)
        l++;
    return l + OPENSSL_strlcpy(dst, src, size);
}

int OPENSSL_hexchar2int(unsigned char c)
{
#ifdef CHARSET_EBCDIC
    c = os_toebcdic[c];
#endif

    switch (c) {
    case '0':
        return 0;
    case '1':
        return 1;
    case '2':
        return 2;
    case '3':
        return 3;
    case '4':
          return 4;
    case '5':
          return 5;
    case '6':
          return 6;
    case '7':
          return 7;
    case '8':
          return 8;
    case '9':
          return 9;
    case 'a': case 'A':
          return 0x0A;
    case 'b': case 'B':
          return 0x0B;
    case 'c': case 'C':
          return 0x0C;
    case 'd': case 'D':
          return 0x0D;
    case 'e': case 'E':
          return 0x0E;
    case 'f': case 'F':
          return 0x0F;
    }
    return -1;
}

static int hexstr2buf_sep(unsigned char *buf, size_t buf_n, size_t *buflen,
                          const char *str, const char sep)
{
    unsigned char *q;
    unsigned char ch, cl;
    int chi, cli;
    const unsigned char *p;
    size_t cnt;

    for (p = (const unsigned char *)str, q = buf, cnt = 0; *p; ) {
        ch = *p++;
        /* A separator of CH_ZERO means there is no separator */
        if (ch == sep && sep != CH_ZERO)
            continue;
        cl = *p++;
        if (!cl) {
            ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_ODD_NUMBER_OF_DIGITS);
            return 0;
        }
        cli = OPENSSL_hexchar2int(cl);
        chi = OPENSSL_hexchar2int(ch);
        if (cli < 0 || chi < 0) {
            ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_ILLEGAL_HEX_DIGIT);
            return 0;
        }
        cnt++;
        if (q != NULL) {
            if (cnt > buf_n) {
                ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER);
                return 0;
            }
            *q++ = (unsigned char)((chi << 4) | cli);
        }
    }

    if (buflen != NULL)
        *buflen = cnt;
    return 1;
}

/*
 * Given a string of hex digits convert to a buffer
 */
int OPENSSL_hexstr2buf_ex(unsigned char *buf, size_t buf_n, size_t *buflen,
                          const char *str, const char sep)
{
    return hexstr2buf_sep(buf, buf_n, buflen, str, sep);
}

unsigned char *ossl_hexstr2buf_sep(const char *str, long *buflen,
                                   const char sep)
{
    unsigned char *buf;
    size_t buf_n, tmp_buflen;

    buf_n = strlen(str);
    if (buf_n <= 1) {
        ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_HEX_STRING_TOO_SHORT);
        return NULL;
    }
    buf_n /= 2;
    if ((buf = OPENSSL_malloc(buf_n)) == NULL) {
        ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    if (buflen != NULL)
        *buflen = 0;
    tmp_buflen = 0;
    if (hexstr2buf_sep(buf, buf_n, &tmp_buflen, str, sep)) {
        if (buflen != NULL)
            *buflen = (long)tmp_buflen;
        return buf;
    }
    OPENSSL_free(buf);
    return NULL;
}

unsigned char *OPENSSL_hexstr2buf(const char *str, long *buflen)
{
    return ossl_hexstr2buf_sep(str, buflen, DEFAULT_SEPARATOR);
}

static int buf2hexstr_sep(char *str, size_t str_n, size_t *strlength,
                          const unsigned char *buf, size_t buflen,
                          const char sep)
{
    static const char hexdig[] = "0123456789ABCDEF";
    const unsigned char *p;
    char *q;
    size_t i;
    int has_sep = (sep != CH_ZERO);
    size_t len = has_sep ? buflen * 3 : 1 + buflen * 2;

    if (len == 0)
        ++len;
    if (strlength != NULL)
        *strlength = len;
    if (str == NULL)
        return 1;

    if (str_n < len) {
        ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER);
        return 0;
    }

    q = str;
    for (i = 0, p = buf; i < buflen; i++, p++) {
        *q++ = hexdig[(*p >> 4) & 0xf];
        *q++ = hexdig[*p & 0xf];
        if (has_sep)
            *q++ = sep;
    }
    if (has_sep && buflen > 0)
        --q;
    *q = CH_ZERO;

#ifdef CHARSET_EBCDIC
    ebcdic2ascii(str, str, q - str);
#endif
    return 1;
}

int OPENSSL_buf2hexstr_ex(char *str, size_t str_n, size_t *strlength,
                          const unsigned char *buf, size_t buflen,
                          const char sep)
{
    return buf2hexstr_sep(str, str_n, strlength, buf, buflen, sep);
}

char *ossl_buf2hexstr_sep(const unsigned char *buf, long buflen, char sep)
{
    char *tmp;
    size_t tmp_n;

    if (buflen == 0)
        return OPENSSL_zalloc(1);

    tmp_n = (sep != CH_ZERO) ? buflen * 3 : 1 + buflen * 2;
    if ((tmp = OPENSSL_malloc(tmp_n)) == NULL) {
        ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    if (buf2hexstr_sep(tmp, tmp_n, NULL, buf, buflen, sep))
        return tmp;
    OPENSSL_free(tmp);
    return NULL;
}


/*
 * 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)
{
    return ossl_buf2hexstr_sep(buf, buflen, ':');
}

int openssl_strerror_r(int errnum, char *buf, size_t buflen)
{
#if defined(_MSC_VER) && _MSC_VER>=1400 && !defined(_WIN32_WCE)
    return !strerror_s(buf, buflen, errnum);
#elif defined(_GNU_SOURCE)
    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)
    /*
     * We can use "real" strerror_r. The OpenSSL version differs in that it
     * gives 1 on success and 0 on failure for consistency with other OpenSSL
     * functions. Real strerror_r does it the other way around
     */
    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;
    err = strerror(errnum);
    /* Can this ever happen? */
    if (err == NULL)
        return 0;
    OPENSSL_strlcpy(buf, err, buflen);
    return 1;
#endif
}

int OPENSSL_strcasecmp(const char *s1, const char *s2)
{
    int t;

    while ((t = ossl_tolower(*s1) - ossl_tolower(*s2++)) == 0)
        if (*s1++ == '\0')
            return 0;
    return t;
}

int OPENSSL_strncasecmp(const char *s1, const char *s2, size_t n)
{
    int t;
    size_t i;

    for (i = 0; i < n; i++)
        if ((t = ossl_tolower(*s1) - ossl_tolower(*s2++)) != 0)
            return t;
        else if (*s1++ == '\0')
            return 0;
    return 0;
}

Coverage Report

Created: 2025-04-22 06:18

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2003-2024 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		#include "e_os.h"
11		#include <string.h>
12		#include <limits.h>
13		#include <openssl/crypto.h>
14		#include "crypto/ctype.h"
15		#include "internal/cryptlib.h"
16		#include "internal/thread_once.h"
17
18	0	#define DEFAULT_SEPARATOR ':'
19	5.65M	#define CH_ZERO '\0'
20
21		char CRYPTO_strdup(const char str, const char* file, int line)
22	186k	{
23	186k	char *ret;
24
25	186k	if (str == NULL)
26	0	return NULL;
27	186k	ret = CRYPTO_malloc(strlen(str) + 1, file, line);
28	186k	if (ret != NULL)
29	186k	strcpy(ret, str);
30	186k	return ret;
31	186k	}
32
33		char CRYPTO_strndup(const char str, size_t s, const char* file, int line)
34	847k	{
35	847k	size_t maxlen;
36	847k	char *ret;
37
38	847k	if (str == NULL)
39	0	return NULL;
40
41	847k	maxlen = OPENSSL_strnlen(str, s);
42
43	847k	ret = CRYPTO_malloc(maxlen + 1, file, line);
44	847k	if (ret) {
45	847k	memcpy(ret, str, maxlen);
46	847k	ret[maxlen] = CH_ZERO;
47	847k	}
48	847k	return ret;
49	847k	}
50
51		void CRYPTO_memdup(const void data, size_t siz, const char* file, int line)
52	118	{
53	118	void *ret;
54
55	118	if (data == NULL \|\| siz >= INT_MAX)
56	0	return NULL;
57
58	118	ret = CRYPTO_malloc(siz, file, line);
59	118	if (ret == NULL) {
60	0	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
61	0	return NULL;
62	0	}
63	118	return memcpy(ret, data, siz);
64	118	}
65
66		size_t OPENSSL_strnlen(const char *str, size_t maxlen)
67	851k	{
68	851k	const char *p;
69
70	5.63M	for (p = str; maxlen-- != 0 && *p != CH_ZERO; ++p) ;
71
72	851k	return p - str;
73	851k	}
74
75		size_t OPENSSL_strlcpy(char dst, const char src, size_t size)
76	24.5k	{
77	24.5k	size_t l = 0;
78	175k	for (; size > 1 && *src; size--) {
79	151k	dst++ = src++;
80	151k	l++;
81	151k	}
82	24.5k	if (size)
83	24.5k	*dst = CH_ZERO;
84	24.5k	return l + strlen(src);
85	24.5k	}
86
87		size_t OPENSSL_strlcat(char dst, const char src, size_t size)
88	10.8k	{
89	10.8k	size_t l = 0;
90	116k	for (; size > 0 && *dst; size--, dst++)
91	105k	l++;
92	10.8k	return l + OPENSSL_strlcpy(dst, src, size);
93	10.8k	}
94
95		int OPENSSL_hexchar2int(unsigned char c)
96	0	{
97		#ifdef CHARSET_EBCDIC
98		c = os_toebcdic[c];
99		#endif
100
101	0	switch (c) {
102	0	case '0':
103	0	return 0;
104	0	case '1':
105	0	return 1;
106	0	case '2':
107	0	return 2;
108	0	case '3':
109	0	return 3;
110	0	case '4':
111	0	return 4;
112	0	case '5':
113	0	return 5;
114	0	case '6':
115	0	return 6;
116	0	case '7':
117	0	return 7;
118	0	case '8':
119	0	return 8;
120	0	case '9':
121	0	return 9;
122	0	case 'a': case 'A':
123	0	return 0x0A;
124	0	case 'b': case 'B':
125	0	return 0x0B;
126	0	case 'c': case 'C':
127	0	return 0x0C;
128	0	case 'd': case 'D':
129	0	return 0x0D;
130	0	case 'e': case 'E':
131	0	return 0x0E;
132	0	case 'f': case 'F':
133	0	return 0x0F;
134	0	}
135	0	return -1;
136	0	}
137
138		static int hexstr2buf_sep(unsigned char buf, size_t buf_n, size_t buflen,
139		const char *str, const char sep)
140	0	{
141	0	unsigned char *q;
142	0	unsigned char ch, cl;
143	0	int chi, cli;
144	0	const unsigned char *p;
145	0	size_t cnt;
146
147	0	for (p = (const unsigned char )str, q = buf, cnt = 0; p; ) {
148	0	ch = *p++;
149		/* A separator of CH_ZERO means there is no separator */
150	0	if (ch == sep && sep != CH_ZERO)
151	0	continue;
152	0	cl = *p++;
153	0	if (!cl) {
154	0	ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_ODD_NUMBER_OF_DIGITS);
155	0	return 0;
156	0	}
157	0	cli = OPENSSL_hexchar2int(cl);
158	0	chi = OPENSSL_hexchar2int(ch);
159	0	if (cli < 0 \|\| chi < 0) {
160	0	ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_ILLEGAL_HEX_DIGIT);
161	0	return 0;
162	0	}
163	0	cnt++;
164	0	if (q != NULL) {
165	0	if (cnt > buf_n) {
166	0	ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER);
167	0	return 0;
168	0	}
169	0	*q++ = (unsigned char)((chi << 4) \| cli);
170	0	}
171	0	}
172
173	0	if (buflen != NULL)
174	0	*buflen = cnt;
175	0	return 1;
176	0	}
177
178		/*
179		* Given a string of hex digits convert to a buffer
180		*/
181		int OPENSSL_hexstr2buf_ex(unsigned char buf, size_t buf_n, size_t buflen,
182		const char *str, const char sep)
183	0	{
184	0	return hexstr2buf_sep(buf, buf_n, buflen, str, sep);
185	0	}
186
187		unsigned char ossl_hexstr2buf_sep(const char str, long *buflen,
188		const char sep)
189	0	{
190	0	unsigned char *buf;
191	0	size_t buf_n, tmp_buflen;
192
193	0	buf_n = strlen(str);
194	0	if (buf_n <= 1) {
195	0	ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_HEX_STRING_TOO_SHORT);
196	0	return NULL;
197	0	}
198	0	buf_n /= 2;
199	0	if ((buf = OPENSSL_malloc(buf_n)) == NULL) {
200	0	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
201	0	return NULL;
202	0	}
203
204	0	if (buflen != NULL)
205	0	*buflen = 0;
206	0	tmp_buflen = 0;
207	0	if (hexstr2buf_sep(buf, buf_n, &tmp_buflen, str, sep)) {
208	0	if (buflen != NULL)
209	0	*buflen = (long)tmp_buflen;
210	0	return buf;
211	0	}
212	0	OPENSSL_free(buf);
213	0	return NULL;
214	0	}
215
216		unsigned char OPENSSL_hexstr2buf(const char str, long *buflen)
217	0	{
218	0	return ossl_hexstr2buf_sep(str, buflen, DEFAULT_SEPARATOR);
219	0	}
220
221		static int buf2hexstr_sep(char str, size_t str_n, size_t strlength,
222		const unsigned char *buf, size_t buflen,
223		const char sep)
224	0	{
225	0	static const char hexdig[] = "0123456789ABCDEF";
226	0	const unsigned char *p;
227	0	char *q;
228	0	size_t i;
229	0	int has_sep = (sep != CH_ZERO);
230	0	size_t len = has_sep ? buflen * 3 : 1 + buflen * 2;
231
232	0	if (len == 0)
233	0	++len;
234	0	if (strlength != NULL)
235	0	*strlength = len;
236	0	if (str == NULL)
237	0	return 1;
238
239	0	if (str_n < len) {
240	0	ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER);
241	0	return 0;
242	0	}
243
244	0	q = str;
245	0	for (i = 0, p = buf; i < buflen; i++, p++) {
246	0	q++ = hexdig[(p >> 4) & 0xf];
247	0	q++ = hexdig[p & 0xf];
248	0	if (has_sep)
249	0	*q++ = sep;
250	0	}
251	0	if (has_sep && buflen > 0)
252	0	--q;
253	0	*q = CH_ZERO;
254
255		#ifdef CHARSET_EBCDIC
256		ebcdic2ascii(str, str, q - str);
257		#endif
258	0	return 1;
259	0	}
260
261		int OPENSSL_buf2hexstr_ex(char str, size_t str_n, size_t strlength,
262		const unsigned char *buf, size_t buflen,
263		const char sep)
264	0	{
265	0	return buf2hexstr_sep(str, str_n, strlength, buf, buflen, sep);
266	0	}
267
268		char ossl_buf2hexstr_sep(const unsigned char buf, long buflen, char sep)
269	0	{
270	0	char *tmp;
271	0	size_t tmp_n;
272
273	0	if (buflen == 0)
274	0	return OPENSSL_zalloc(1);
275
276	0	tmp_n = (sep != CH_ZERO) ? buflen * 3 : 1 + buflen * 2;
277	0	if ((tmp = OPENSSL_malloc(tmp_n)) == NULL) {
278	0	ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
279	0	return NULL;
280	0	}
281
282	0	if (buf2hexstr_sep(tmp, tmp_n, NULL, buf, buflen, sep))
283	0	return tmp;
284	0	OPENSSL_free(tmp);
285	0	return NULL;
286	0	}
287
288
289		/*
290		* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
291		* hex representation @@@ (Contents of buffer are always kept in ASCII, also
292		* on EBCDIC machines)
293		*/
294		char OPENSSL_buf2hexstr(const unsigned char buf, long buflen)
295	0	{
296	0	return ossl_buf2hexstr_sep(buf, buflen, ':');
297	0	}
298
299		int openssl_strerror_r(int errnum, char *buf, size_t buflen)
300	0	{
301		#if defined(_MSC_VER) && _MSC_VER>=1400 && !defined(_WIN32_WCE)
302		return !strerror_s(buf, buflen, errnum);
303		#elif defined(_GNU_SOURCE)
304		char *err;
305
306		/*
307		* GNU strerror_r may not actually set buf.
308		* It can return a pointer to some (immutable) static string in which case
309		* buf is left unused.
310		*/
311		err = strerror_r(errnum, buf, buflen);
312		if (err == NULL \|\| buflen == 0)
313		return 0;
314		/*
315		* If err is statically allocated, err != buf and we need to copy the data.
316		* If err points somewhere inside buf, OPENSSL_strlcpy can handle this,
317		* since src and dest are not annotated with __restrict and the function
318		* reads src byte for byte and writes to dest.
319		* If err == buf we do not have to copy anything.
320		*/
321		if (err != buf)
322		OPENSSL_strlcpy(buf, err, buflen);
323		return 1;
324		#elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) \|\| \
325		(defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
326		/*
327		* We can use "real" strerror_r. The OpenSSL version differs in that it
328		* gives 1 on success and 0 on failure for consistency with other OpenSSL
329		* functions. Real strerror_r does it the other way around
330		*/
331	0	return !strerror_r(errnum, buf, buflen);
332		#else
333		char *err;
334
335		/* Fall back to non-thread safe strerror()...its all we can do */
336		if (buflen < 2)
337		return 0;
338		err = strerror(errnum);
339		/* Can this ever happen? */
340		if (err == NULL)
341		return 0;
342		OPENSSL_strlcpy(buf, err, buflen);
343		return 1;
344		#endif
345	0	}
346
347		int OPENSSL_strcasecmp(const char s1, const char s2)
348	1.85M	{
349	1.85M	int t;
350
351	8.57M	while ((t = ossl_tolower(s1) - ossl_tolower(s2++)) == 0)
352	7.60M	if (*s1++ == '\0')
353	891k	return 0;
354	965k	return t;
355	1.85M	}
356
357		int OPENSSL_strncasecmp(const char s1, const char s2, size_t n)
358	57.6k	{
359	57.6k	int t;
360	57.6k	size_t i;
361
362	180k	for (i = 0; i < n; i++)
363	124k	if ((t = ossl_tolower(s1) - ossl_tolower(s2++)) != 0)
364	1.69k	return t;
365	123k	else if (*s1++ == '\0')
366	0	return 0;
367	55.9k	return 0;
368	57.6k	}