/src/libressl/crypto/bio/bss_file.c

Source (jump to first uncovered line)
/* $OpenBSD: bss_file.c,v 1.34 2022/01/07 09:02:17 tb Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

/*
 * 03-Dec-1997  rdenny@dc3.com  Fix bug preventing use of stdin/stdout
 *    with binary data (e.g. asn1parse -inform DER < xxx) under
 *    Windows
 */

#ifndef HEADER_BSS_FILE_C
#define HEADER_BSS_FILE_C

#if defined(__linux) || defined(__sun) || defined(__hpux)
/* Following definition aliases fopen to fopen64 on above mentioned
 * platforms. This makes it possible to open and sequentially access
 * files larger than 2GB from 32-bit application. It does not allow to
 * traverse them beyond 2GB with fseek/ftell, but on the other hand *no*
 * 32-bit platform permits that, not with fseek/ftell. Not to mention
 * that breaking 2GB limit for seeking would require surgery to *our*
 * API. But sequential access suffices for practical cases when you
 * can run into large files, such as fingerprinting, so we can let API
 * alone. For reference, the list of 32-bit platforms which allow for
 * sequential access of large files without extra "magic" comprise *BSD,
 * Darwin, IRIX...
 */
#ifndef _FILE_OFFSET_BITS
#define _FILE_OFFSET_BITS 64
#endif
#endif

#include <errno.h>
#include <stdio.h>
#include <string.h>

#include <openssl/bio.h>
#include <openssl/err.h>

#include "bio_local.h"

static int file_write(BIO *h, const char *buf, int num);
static int file_read(BIO *h, char *buf, int size);
static int file_puts(BIO *h, const char *str);
static int file_gets(BIO *h, char *str, int size);
static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int file_new(BIO *h);
static int file_free(BIO *data);

static const BIO_METHOD methods_filep = {
  .type = BIO_TYPE_FILE,
  .name = "FILE pointer",
  .bwrite = file_write,
  .bread = file_read,
  .bputs = file_puts,
  .bgets = file_gets,
  .ctrl = file_ctrl,
  .create = file_new,
  .destroy = file_free
};

BIO *
BIO_new_file(const char *filename, const char *mode)
{
  BIO  *ret;
  FILE *file = NULL;

  file = fopen(filename, mode);

  if (file == NULL) {
    SYSerror(errno);
    ERR_asprintf_error_data("fopen('%s', '%s')", filename, mode);
    if (errno == ENOENT)
      BIOerror(BIO_R_NO_SUCH_FILE);
    else
      BIOerror(ERR_R_SYS_LIB);
    return (NULL);
  }
  if ((ret = BIO_new(BIO_s_file())) == NULL) {
    fclose(file);
    return (NULL);
  }

  BIO_set_fp(ret, file, BIO_CLOSE);
  return (ret);
}

BIO *
BIO_new_fp(FILE *stream, int close_flag)
{
  BIO *ret;

  if ((ret = BIO_new(BIO_s_file())) == NULL)
    return (NULL);

  BIO_set_fp(ret, stream, close_flag);
  return (ret);
}

const BIO_METHOD *
BIO_s_file(void)
{
  return (&methods_filep);
}

static int
file_new(BIO *bi)
{
  bi->init = 0;
  bi->num = 0;
  bi->ptr = NULL;
  bi->flags=0;
  return (1);
}

static int
file_free(BIO *a)
{
  if (a == NULL)
    return (0);
  if (a->shutdown) {
    if ((a->init) && (a->ptr != NULL)) {
      fclose (a->ptr);
      a->ptr = NULL;
      a->flags = 0;
    }
    a->init = 0;
  }
  return (1);
}

static int
file_read(BIO *b, char *out, int outl)
{
  int ret = 0;

  if (b->init && out != NULL) {
    ret = fread(out, 1, outl, (FILE *)b->ptr);
    if (ret == 0 && ferror((FILE *)b->ptr)) {
      SYSerror(errno);
      BIOerror(ERR_R_SYS_LIB);
      ret = -1;
    }
  }
  return (ret);
}

static int
file_write(BIO *b, const char *in, int inl)
{
  int ret = 0;

  if (b->init && in != NULL)
    ret = fwrite(in, 1, inl, (FILE *)b->ptr);
  return (ret);
}

static long
file_ctrl(BIO *b, int cmd, long num, void *ptr)
{
  long ret = 1;
  FILE *fp = (FILE *)b->ptr;
  FILE **fpp;
  char p[4];

  switch (cmd) {
  case BIO_C_FILE_SEEK:
  case BIO_CTRL_RESET:
    ret = (long)fseek(fp, num, 0);
    break;
  case BIO_CTRL_EOF:
    ret = (long)feof(fp);
    break;
  case BIO_C_FILE_TELL:
  case BIO_CTRL_INFO:
    ret = ftell(fp);
    break;
  case BIO_C_SET_FILE_PTR:
    file_free(b);
    b->shutdown = (int)num&BIO_CLOSE;
    b->ptr = ptr;
    b->init = 1;
    break;
  case BIO_C_SET_FILENAME:
    file_free(b);
    b->shutdown = (int)num&BIO_CLOSE;
    if (num & BIO_FP_APPEND) {
      if (num & BIO_FP_READ)
        strlcpy(p, "a+", sizeof p);
      else  strlcpy(p, "a", sizeof p);
    } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
      strlcpy(p, "r+", sizeof p);
    else if (num & BIO_FP_WRITE)
      strlcpy(p, "w", sizeof p);
    else if (num & BIO_FP_READ)
      strlcpy(p, "r", sizeof p);
    else {
      BIOerror(BIO_R_BAD_FOPEN_MODE);
      ret = 0;
      break;
    }
    fp = fopen(ptr, p);
    if (fp == NULL) {
      SYSerror(errno);
      ERR_asprintf_error_data("fopen('%s', '%s')", ptr, p);
      BIOerror(ERR_R_SYS_LIB);
      ret = 0;
      break;
    }
    b->ptr = fp;
    b->init = 1;
    break;
  case BIO_C_GET_FILE_PTR:
    /* the ptr parameter is actually a FILE ** in this case. */
    if (ptr != NULL) {
      fpp = (FILE **)ptr;
      *fpp = (FILE *)b->ptr;
    }
    break;
  case BIO_CTRL_GET_CLOSE:
    ret = (long)b->shutdown;
    break;
  case BIO_CTRL_SET_CLOSE:
    b->shutdown = (int)num;
    break;
  case BIO_CTRL_FLUSH:
    fflush((FILE *)b->ptr);
    break;
  case BIO_CTRL_DUP:
    ret = 1;
    break;

  case BIO_CTRL_WPENDING:
  case BIO_CTRL_PENDING:
  case BIO_CTRL_PUSH:
  case BIO_CTRL_POP:
  default:
    ret = 0;
    break;
  }
  return (ret);
}

static int
file_gets(BIO *bp, char *buf, int size)
{
  int ret = 0;

  buf[0] = '\0';
  if (!fgets(buf, size,(FILE *)bp->ptr))
    goto err;
  if (buf[0] != '\0')
    ret = strlen(buf);
err:
  return (ret);
}

static int
file_puts(BIO *bp, const char *str)
{
  int n, ret;

  n = strlen(str);
  ret = file_write(bp, str, n);
  return (ret);
}


#endif /* HEADER_BSS_FILE_C */

Coverage Report

Created: 2022-08-24 06:30

Line	Count	Source (jump to first uncovered line)
1		/* $OpenBSD: bss_file.c,v 1.34 2022/01/07 09:02:17 tb Exp $ */
2		/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3		* All rights reserved.
4		*
5		* This package is an SSL implementation written
6		* by Eric Young (eay@cryptsoft.com).
7		* The implementation was written so as to conform with Netscapes SSL.
8		*
9		* This library is free for commercial and non-commercial use as long as
10		* the following conditions are aheared to. The following conditions
11		* apply to all code found in this distribution, be it the RC4, RSA,
12		* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13		* included with this distribution is covered by the same copyright terms
14		* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15		*
16		* Copyright remains Eric Young's, and as such any Copyright notices in
17		* the code are not to be removed.
18		* If this package is used in a product, Eric Young should be given attribution
19		* as the author of the parts of the library used.
20		* This can be in the form of a textual message at program startup or
21		* in documentation (online or textual) provided with the package.
22		*
23		* Redistribution and use in source and binary forms, with or without
24		* modification, are permitted provided that the following conditions
25		* are met:
26		* 1. Redistributions of source code must retain the copyright
27		* notice, this list of conditions and the following disclaimer.
28		* 2. Redistributions in binary form must reproduce the above copyright
29		* notice, this list of conditions and the following disclaimer in the
30		* documentation and/or other materials provided with the distribution.
31		* 3. All advertising materials mentioning features or use of this software
32		* must display the following acknowledgement:
33		* "This product includes cryptographic software written by
34		* Eric Young (eay@cryptsoft.com)"
35		* The word 'cryptographic' can be left out if the rouines from the library
36		* being used are not cryptographic related :-).
37		* 4. If you include any Windows specific code (or a derivative thereof) from
38		* the apps directory (application code) you must include an acknowledgement:
39		* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40		*
41		* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44		* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51		* SUCH DAMAGE.
52		*
53		* The licence and distribution terms for any publically available version or
54		* derivative of this code cannot be changed. i.e. this code cannot simply be
55		* copied and put under another distribution licence
56		* [including the GNU Public Licence.]
57		*/
58
59		/*
60		* 03-Dec-1997 rdenny@dc3.com Fix bug preventing use of stdin/stdout
61		* with binary data (e.g. asn1parse -inform DER < xxx) under
62		* Windows
63		*/
64
65		#ifndef HEADER_BSS_FILE_C
66		#define HEADER_BSS_FILE_C
67
68		#if defined(__linux) \|\| defined(__sun) \|\| defined(__hpux)
69		/* Following definition aliases fopen to fopen64 on above mentioned
70		* platforms. This makes it possible to open and sequentially access
71		* files larger than 2GB from 32-bit application. It does not allow to
72		* traverse them beyond 2GB with fseek/ftell, but on the other hand no
73		* 32-bit platform permits that, not with fseek/ftell. Not to mention
74		* that breaking 2GB limit for seeking would require surgery to our
75		* API. But sequential access suffices for practical cases when you
76		* can run into large files, such as fingerprinting, so we can let API
77		* alone. For reference, the list of 32-bit platforms which allow for
78		* sequential access of large files without extra "magic" comprise *BSD,
79		* Darwin, IRIX...
80		*/
81		#ifndef _FILE_OFFSET_BITS
82		#define _FILE_OFFSET_BITS 64
83		#endif
84		#endif
85
86		#include <errno.h>
87		#include <stdio.h>
88		#include <string.h>
89
90		#include <openssl/bio.h>
91		#include <openssl/err.h>
92
93		#include "bio_local.h"
94
95		static int file_write(BIO h, const char buf, int num);
96		static int file_read(BIO h, char buf, int size);
97		static int file_puts(BIO h, const char str);
98		static int file_gets(BIO h, char str, int size);
99		static long file_ctrl(BIO h, int cmd, long arg1, void arg2);
100		static int file_new(BIO *h);
101		static int file_free(BIO *data);
102
103		static const BIO_METHOD methods_filep = {
104		.type = BIO_TYPE_FILE,
105		.name = "FILE pointer",
106		.bwrite = file_write,
107		.bread = file_read,
108		.bputs = file_puts,
109		.bgets = file_gets,
110		.ctrl = file_ctrl,
111		.create = file_new,
112		.destroy = file_free
113		};
114
115		BIO *
116		BIO_new_file(const char filename, const char mode)
117	0	{
118	0	BIO *ret;
119	0	FILE *file = NULL;
120
121	0	file = fopen(filename, mode);
122
123	0	if (file == NULL) {
124	0	SYSerror(errno);
125	0	ERR_asprintf_error_data("fopen('%s', '%s')", filename, mode);
126	0	if (errno == ENOENT)
127	0	BIOerror(BIO_R_NO_SUCH_FILE);
128	0	else
129	0	BIOerror(ERR_R_SYS_LIB);
130	0	return (NULL);
131	0	}
132	0	if ((ret = BIO_new(BIO_s_file())) == NULL) {
133	0	fclose(file);
134	0	return (NULL);
135	0	}
136
137	0	BIO_set_fp(ret, file, BIO_CLOSE);
138	0	return (ret);
139	0	}
140
141		BIO *
142		BIO_new_fp(FILE *stream, int close_flag)
143	0	{
144	0	BIO *ret;
145
146	0	if ((ret = BIO_new(BIO_s_file())) == NULL)
147	0	return (NULL);
148
149	0	BIO_set_fp(ret, stream, close_flag);
150	0	return (ret);
151	0	}
152
153		const BIO_METHOD *
154		BIO_s_file(void)
155	0	{
156	0	return (&methods_filep);
157	0	}
158
159		static int
160		file_new(BIO *bi)
161	0	{
162	0	bi->init = 0;
163	0	bi->num = 0;
164	0	bi->ptr = NULL;
165	0	bi->flags=0;
166	0	return (1);
167	0	}
168
169		static int
170		file_free(BIO *a)
171	0	{
172	0	if (a == NULL)
173	0	return (0);
174	0	if (a->shutdown) {
175	0	if ((a->init) && (a->ptr != NULL)) {
176	0	fclose (a->ptr);
177	0	a->ptr = NULL;
178	0	a->flags = 0;
179	0	}
180	0	a->init = 0;
181	0	}
182	0	return (1);
183	0	}
184
185		static int
186		file_read(BIO b, char out, int outl)
187	0	{
188	0	int ret = 0;
189
190	0	if (b->init && out != NULL) {
191	0	ret = fread(out, 1, outl, (FILE *)b->ptr);
192	0	if (ret == 0 && ferror((FILE *)b->ptr)) {
193	0	SYSerror(errno);
194	0	BIOerror(ERR_R_SYS_LIB);
195	0	ret = -1;
196	0	}
197	0	}
198	0	return (ret);
199	0	}
200
201		static int
202		file_write(BIO b, const char in, int inl)
203	0	{
204	0	int ret = 0;
205
206	0	if (b->init && in != NULL)
207	0	ret = fwrite(in, 1, inl, (FILE *)b->ptr);
208	0	return (ret);
209	0	}
210
211		static long
212		file_ctrl(BIO b, int cmd, long num, void ptr)
213	0	{
214	0	long ret = 1;
215	0	FILE fp = (FILE )b->ptr;
216	0	FILE **fpp;
217	0	char p[4];
218
219	0	switch (cmd) {
220	0	case BIO_C_FILE_SEEK:
221	0	case BIO_CTRL_RESET:
222	0	ret = (long)fseek(fp, num, 0);
223	0	break;
224	0	case BIO_CTRL_EOF:
225	0	ret = (long)feof(fp);
226	0	break;
227	0	case BIO_C_FILE_TELL:
228	0	case BIO_CTRL_INFO:
229	0	ret = ftell(fp);
230	0	break;
231	0	case BIO_C_SET_FILE_PTR:
232	0	file_free(b);
233	0	b->shutdown = (int)num&BIO_CLOSE;
234	0	b->ptr = ptr;
235	0	b->init = 1;
236	0	break;
237	0	case BIO_C_SET_FILENAME:
238	0	file_free(b);
239	0	b->shutdown = (int)num&BIO_CLOSE;
240	0	if (num & BIO_FP_APPEND) {
241	0	if (num & BIO_FP_READ)
242	0	strlcpy(p, "a+", sizeof p);
243	0	else strlcpy(p, "a", sizeof p);
244	0	} else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
245	0	strlcpy(p, "r+", sizeof p);
246	0	else if (num & BIO_FP_WRITE)
247	0	strlcpy(p, "w", sizeof p);
248	0	else if (num & BIO_FP_READ)
249	0	strlcpy(p, "r", sizeof p);
250	0	else {
251	0	BIOerror(BIO_R_BAD_FOPEN_MODE);
252	0	ret = 0;
253	0	break;
254	0	}
255	0	fp = fopen(ptr, p);
256	0	if (fp == NULL) {
257	0	SYSerror(errno);
258	0	ERR_asprintf_error_data("fopen('%s', '%s')", ptr, p);
259	0	BIOerror(ERR_R_SYS_LIB);
260	0	ret = 0;
261	0	break;
262	0	}
263	0	b->ptr = fp;
264	0	b->init = 1;
265	0	break;
266	0	case BIO_C_GET_FILE_PTR:
267		/* the ptr parameter is actually a FILE ** in this case. */
268	0	if (ptr != NULL) {
269	0	fpp = (FILE **)ptr;
270	0	fpp = (FILE )b->ptr;
271	0	}
272	0	break;
273	0	case BIO_CTRL_GET_CLOSE:
274	0	ret = (long)b->shutdown;
275	0	break;
276	0	case BIO_CTRL_SET_CLOSE:
277	0	b->shutdown = (int)num;
278	0	break;
279	0	case BIO_CTRL_FLUSH:
280	0	fflush((FILE *)b->ptr);
281	0	break;
282	0	case BIO_CTRL_DUP:
283	0	ret = 1;
284	0	break;
285
286	0	case BIO_CTRL_WPENDING:
287	0	case BIO_CTRL_PENDING:
288	0	case BIO_CTRL_PUSH:
289	0	case BIO_CTRL_POP:
290	0	default:
291	0	ret = 0;
292	0	break;
293	0	}
294	0	return (ret);
295	0	}
296
297		static int
298		file_gets(BIO bp, char buf, int size)
299	0	{
300	0	int ret = 0;
301
302	0	buf[0] = '\0';
303	0	if (!fgets(buf, size,(FILE *)bp->ptr))
304	0	goto err;
305	0	if (buf[0] != '\0')
306	0	ret = strlen(buf);
307	0	err:
308	0	return (ret);
309	0	}
310
311		static int
312		file_puts(BIO bp, const char str)
313	0	{
314	0	int n, ret;
315
316	0	n = strlen(str);
317	0	ret = file_write(bp, str, n);
318	0	return (ret);
319	0	}
320
321
322		#endif /* HEADER_BSS_FILE_C */