[thirdparty/openssl.git] / crypto / o_str.c

/*
 * Copyright 2003-2017 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 <limits.h>
#include <openssl/crypto.h>
#include "internal/cryptlib.h"

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] = '\0';
    }
    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) {
        CRYPTOerr(CRYPTO_F_CRYPTO_MEMDUP, 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 != '\0'; ++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 = '\0';
    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;
}

/*
 * Give 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)
{
    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++;
        if (ch == ':')
            continue;
        cl = *p++;
        if (!cl) {
            CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
                      CRYPTO_R_ODD_NUMBER_OF_DIGITS);
            return 0;
        }
        cli = OPENSSL_hexchar2int(cl);
        chi = OPENSSL_hexchar2int(ch);
        if (cli < 0 || chi < 0) {
            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);
        }
    }

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

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";
    const unsigned char *p;
    char *q;
    size_t i;

    if (strlen != NULL)
        *strlen = buflen * 3;
    if (str == NULL)
        return 1;

    if (str_n < (unsigned long)buflen * 3) {
        CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR_EX, 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];
        *q++ = ':';
    }
    q[-1] = 0;
#ifdef CHARSET_EBCDIC
    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);

    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)
    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
}
Commit	Line	Data
0f113f3e	1	/*
a1df06b3	2	* Copyright 2003-2017 The OpenSSL Project Authors. All Rights Reserved.
e6fa67fa	3	*
0e9725bc	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
62867571 RS	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
e6fa67fa RL	8	*/
e6fa67fa RL	9
bef7a815	10	#include "e_os.h"
07016a8a	11	#include <limits.h>
7644a9ae RS	12	#include <openssl/crypto.h>
7644a9ae RS	13	#include "internal/cryptlib.h"
7644a9ae	14
037439c4 MC	15	char CRYPTO_strdup(const char str, const char* file, int line)
	16	{
	17	char *ret;
	18
	19	if (str == NULL)
	20	return NULL;
	21	ret = CRYPTO_malloc(strlen(str) + 1, file, line);
	22	if (ret != NULL)
	23	strcpy(ret, str);
	24	return ret;
	25	}
	26
	27	char CRYPTO_strndup(const char str, size_t s, const char* file, int line)
	28	{
	29	size_t maxlen;
	30	char *ret;
	31
	32	if (str == NULL)
	33	return NULL;
	34
	35	maxlen = OPENSSL_strnlen(str, s);
	36
	37	ret = CRYPTO_malloc(maxlen + 1, file, line);
	38	if (ret) {
	39	memcpy(ret, str, maxlen);
	40	ret[maxlen] = '\0';
	41	}
	42	return ret;
	43	}
	44
	45	void CRYPTO_memdup(const void data, size_t siz, const char* file, int line)
	46	{
	47	void *ret;
	48
	49	if (data == NULL \|\| siz >= INT_MAX)
	50	return NULL;
	51
	52	ret = CRYPTO_malloc(siz, file, line);
	53	if (ret == NULL) {
	54	CRYPTOerr(CRYPTO_F_CRYPTO_MEMDUP, ERR_R_MALLOC_FAILURE);
	55	return NULL;
	56	}
	57	return memcpy(ret, data, siz);
	58	}
	59
7644a9ae RS	60	size_t OPENSSL_strnlen(const char *str, size_t maxlen)
	61	{
	62	const char *p;
	63
	64	for (p = str; maxlen-- != 0 && *p != '\0'; ++p) ;
	65
	66	return p - str;
	67	}
	68
	69	size_t OPENSSL_strlcpy(char dst, const char src, size_t size)
	70	{
	71	size_t l = 0;
	72	for (; size > 1 && *src; size--) {
	73	dst++ = src++;
	74	l++;
	75	}
	76	if (size)
	77	*dst = '\0';
	78	return l + strlen(src);
	79	}
	80
	81	size_t OPENSSL_strlcat(char dst, const char src, size_t size)
	82	{
	83	size_t l = 0;
	84	for (; size > 0 && *dst; size--, dst++)
	85	l++;
	86	return l + OPENSSL_strlcpy(dst, src, size);
	87	}
14f051a0 RS	88
	89	int OPENSSL_hexchar2int(unsigned char c)
	90	{
	91	#ifdef CHARSET_EBCDIC
	92	c = os_toebcdic[c];
	93	#endif
	94
	95	switch (c) {
	96	case '0':
	97	return 0;
	98	case '1':
	99	return 1;
	100	case '2':
	101	return 2;
	102	case '3':
	103	return 3;
	104	case '4':
	105	return 4;
	106	case '5':
	107	return 5;
	108	case '6':
	109	return 6;
	110	case '7':
	111	return 7;
	112	case '8':
	113	return 8;
	114	case '9':
	115	return 9;
	116	case 'a': case 'A':
	117	return 0x0A;
	118	case 'b': case 'B':
	119	return 0x0B;
	120	case 'c': case 'C':
	121	return 0x0C;
	122	case 'd': case 'D':
	123	return 0x0D;
	124	case 'e': case 'E':
	125	return 0x0E;
	126	case 'f': case 'F':
	127	return 0x0F;
	128	}
	129	return -1;
	130	}
	131
037439c4 MC	132	/*
	133	* Give a string of hex digits convert to a buffer
	134	*/
82bd7c2c RL	135	int OPENSSL_hexstr2buf_ex(unsigned char buf, size_t buf_n, size_t buflen,
82bd7c2c RL	136	const char *str)
037439c4	137	{
82bd7c2c	138	unsigned char *q;
037439c4 MC	139	unsigned char ch, cl;
	140	int chi, cli;
	141	const unsigned char *p;
82bd7c2c	142	size_t cnt;
037439c4	143
82bd7c2c	144	for (p = (const unsigned char )str, q = buf, cnt = 0; p; ) {
037439c4 MC	145	ch = *p++;
	146	if (ch == ':')
	147	continue;
	148	cl = *p++;
	149	if (!cl) {
82bd7c2c	150	CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
037439c4	151	CRYPTO_R_ODD_NUMBER_OF_DIGITS);
82bd7c2c	152	return 0;
037439c4 MC	153	}
	154	cli = OPENSSL_hexchar2int(cl);
	155	chi = OPENSSL_hexchar2int(ch);
	156	if (cli < 0 \|\| chi < 0) {
82bd7c2c RL	157	CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
	158	CRYPTO_R_ILLEGAL_HEX_DIGIT);
	159	return 0;
	160	}
	161	cnt++;
	162	if (q != NULL) {
	163	if (cnt > buf_n) {
	164	CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
	165	CRYPTO_R_TOO_SMALL_BUFFER);
	166	return 0;
	167	}
	168	*q++ = (unsigned char)((chi << 4) \| cli);
037439c4	169	}
037439c4 MC	170	}
037439c4 MC	171
82bd7c2c RL	172	if (buflen != NULL)
	173	*buflen = cnt;
	174	return 1;
037439c4 MC	175	}
037439c4 MC	176
82bd7c2c RL	177	unsigned char OPENSSL_hexstr2buf(const char str, long *buflen)
	178	{
	179	unsigned char *buf;
	180	size_t buf_n, tmp_buflen;
	181
	182	buf_n = strlen(str) >> 1;
	183	if ((buf = OPENSSL_malloc(buf_n)) == NULL) {
	184	CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
	185	return NULL;
	186	}
	187
	188	if (buflen != NULL)
	189	*buflen = 0;
	190	tmp_buflen = 0;
	191	if (OPENSSL_hexstr2buf_ex(buf, buf_n, &tmp_buflen, str)) {
	192	if (buflen != NULL)
	193	*buflen = (long)tmp_buflen;
	194	return buf;
	195	}
	196	OPENSSL_free(buf);
	197	return NULL;
	198	}
	199
	200	int OPENSSL_buf2hexstr_ex(char str, size_t str_n, size_t strlen,
	201	const unsigned char *buf, size_t buflen)
037439c4 MC	202	{
037439c4 MC	203	static const char hexdig[] = "0123456789ABCDEF";
037439c4	204	const unsigned char *p;
82bd7c2c RL	205	char *q;
82bd7c2c RL	206	size_t i;
037439c4	207
82bd7c2c RL	208	if (strlen != NULL)
	209	strlen = buflen 3;
	210	if (str == NULL)
	211	return 1;
037439c4	212
82bd7c2c RL	213	if (str_n < (unsigned long)buflen * 3) {
	214	CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR_EX, CRYPTO_R_TOO_SMALL_BUFFER);
	215	return 0;
037439c4	216	}
82bd7c2c RL	217
	218	q = str;
	219	for (i = 0, p = buf; i < buflen; i++, p++) {
037439c4 MC	220	q++ = hexdig[(p >> 4) & 0xf];
	221	q++ = hexdig[p & 0xf];
	222	*q++ = ':';
	223	}
	224	q[-1] = 0;
	225	#ifdef CHARSET_EBCDIC
82bd7c2c	226	ebcdic2ascii(str, str, q - str - 1);
037439c4	227	#endif
82bd7c2c RL	228	return 1;
	229	}
	230
	231	/*
	232	* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
	233	* hex representation @@@ (Contents of buffer are always kept in ASCII, also
	234	* on EBCDIC machines)
	235	*/
	236	char OPENSSL_buf2hexstr(const unsigned char buf, long buflen)
	237	{
	238	char *tmp;
	239	size_t tmp_n;
	240
	241	if (buflen == 0)
	242	return OPENSSL_zalloc(1);
	243
	244	tmp_n = buflen * 3;
	245	if ((tmp = OPENSSL_malloc(tmp_n)) == NULL) {
	246	CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
	247	return NULL;
	248	}
037439c4	249
82bd7c2c RL	250	if (OPENSSL_buf2hexstr_ex(tmp, tmp_n, NULL, buf, buflen))
	251	return tmp;
	252	OPENSSL_free(tmp);
	253	return NULL;
037439c4 MC	254	}
037439c4 MC	255
7d37818d MC	256	int openssl_strerror_r(int errnum, char *buf, size_t buflen)
7d37818d MC	257	{
43c4116c AP	258	#if defined(_MSC_VER) && _MSC_VER>=1400
43c4116c AP	259	return !strerror_s(buf, buflen, errnum);
efdb2d6c	260	#elif defined(_GNU_SOURCE)
e3b35d2b VC	261	char *err;
	262
	263	/*
	264	* GNU strerror_r may not actually set buf.
	265	* It can return a pointer to some (immutable) static string in which case
	266	* buf is left unused.
	267	*/
	268	err = strerror_r(errnum, buf, buflen);
e7a4682d	269	if (err == NULL \|\| buflen == 0)
e3b35d2b VC	270	return 0;
	271	/*
	272	* If err is statically allocated, err != buf and we need to copy the data.
	273	* If err points somewhere inside buf, OPENSSL_strlcpy can handle this,
	274	* since src and dest are not annotated with __restrict and the function
	275	* reads src byte for byte and writes to dest.
	276	* If err == buf we do not have to copy anything.
	277	*/
	278	if (err != buf)
	279	OPENSSL_strlcpy(buf, err, buflen);
	280	return 1;
01b76c2c BE	281	#elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) \|\| \
01b76c2c BE	282	(defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
7d37818d MC	283	/*
	284	* We can use "real" strerror_r. The OpenSSL version differs in that it
	285	* gives 1 on success and 0 on failure for consistency with other OpenSSL
	286	* functions. Real strerror_r does it the other way around
	287	*/
	288	return !strerror_r(errnum, buf, buflen);
	289	#else
	290	char *err;
e3b35d2b	291
7d37818d MC	292	/* Fall back to non-thread safe strerror()...its all we can do */
	293	if (buflen < 2)
	294	return 0;
	295	err = strerror(errnum);
	296	/* Can this ever happen? */
	297	if (err == NULL)
	298	return 0;
e3b35d2b	299	OPENSSL_strlcpy(buf, err, buflen);
7d37818d MC	300	return 1;
	301	#endif
	302	}