/src/openssl/crypto/rand/rand_egd.c

Source (jump to first uncovered line)
/* crypto/rand/rand_egd.c */
/* Written by Ulf Moeller and Lutz Jaenicke for the OpenSSL project. */
/* ====================================================================
 * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <openssl/e_os2.h>
#include <openssl/rand.h>
#include <openssl/buffer.h>

/*-
 * Query the EGD <URL: http://www.lothar.com/tech/crypto/>.
 *
 * This module supplies three routines:
 *
 * RAND_query_egd_bytes(path, buf, bytes)
 *   will actually query "bytes" bytes of entropy form the egd-socket located
 *   at path and will write them to buf (if supplied) or will directly feed
 *   it to RAND_seed() if buf==NULL.
 *   The number of bytes is not limited by the maximum chunk size of EGD,
 *   which is 255 bytes. If more than 255 bytes are wanted, several chunks
 *   of entropy bytes are requested. The connection is left open until the
 *   query is competed.
 *   RAND_query_egd_bytes() returns with
 *     -1  if an error occured during connection or communication.
 *     num the number of bytes read from the EGD socket. This number is either
 *         the number of bytes requested or smaller, if the EGD pool is
 *         drained and the daemon signals that the pool is empty.
 *   This routine does not touch any RAND_status(). This is necessary, since
 *   PRNG functions may call it during initialization.
 *
 * RAND_egd_bytes(path, bytes) will query "bytes" bytes and have them
 *   used to seed the PRNG.
 *   RAND_egd_bytes() is a wrapper for RAND_query_egd_bytes() with buf=NULL.
 *   Unlike RAND_query_egd_bytes(), RAND_status() is used to test the
 *   seed status so that the return value can reflect the seed state:
 *     -1  if an error occured during connection or communication _or_
 *         if the PRNG has still not received the required seeding.
 *     num the number of bytes read from the EGD socket. This number is either
 *         the number of bytes requested or smaller, if the EGD pool is
 *         drained and the daemon signals that the pool is empty.
 *
 * RAND_egd(path) will query 255 bytes and use the bytes retreived to seed
 *   the PRNG.
 *   RAND_egd() is a wrapper for RAND_egd_bytes() with numbytes=255.
 */

#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE) || defined(OPENSSL_SYS_VOS) || defined(OPENSSL_SYS_BEOS)
int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
{
    return (-1);
}

int RAND_egd(const char *path)
{
    return (-1);
}

int RAND_egd_bytes(const char *path, int bytes)
{
    return (-1);
}
#else
# include <openssl/opensslconf.h>
# include OPENSSL_UNISTD
# include <stddef.h>
# include <sys/types.h>
# include <sys/socket.h>
# ifndef NO_SYS_UN_H
#  ifdef OPENSSL_SYS_VXWORKS
#   include <streams/un.h>
#  else
#   include <sys/un.h>
#  endif
# else
struct sockaddr_un {
    short sun_family;           /* AF_UNIX */
    char sun_path[108];         /* path name (gag) */
};
# endif                         /* NO_SYS_UN_H */
# include <string.h>
# include <errno.h>

# ifndef offsetof
#  define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
# endif

int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
{
    int ret = 0;
    struct sockaddr_un addr;
    int len, num, numbytes;
    int fd = -1;
    int success;
    unsigned char egdbuf[2], tempbuf[255], *retrievebuf;

    memset(&addr, 0, sizeof(addr));
    addr.sun_family = AF_UNIX;
    if (strlen(path) >= sizeof(addr.sun_path))
        return (-1);
    BUF_strlcpy(addr.sun_path, path, sizeof addr.sun_path);
    len = offsetof(struct sockaddr_un, sun_path) + strlen(path);
    fd = socket(AF_UNIX, SOCK_STREAM, 0);
    if (fd == -1)
        return (-1);
    success = 0;
    while (!success) {
        if (connect(fd, (struct sockaddr *)&addr, len) == 0)
            success = 1;
        else {
            switch (errno) {
# ifdef EINTR
            case EINTR:
# endif
# ifdef EAGAIN
            case EAGAIN:
# endif
# ifdef EINPROGRESS
            case EINPROGRESS:
# endif
# ifdef EALREADY
            case EALREADY:
# endif
                /* No error, try again */
                break;
# ifdef EISCONN
            case EISCONN:
                success = 1;
                break;
# endif
            default:
                goto err;       /* failure */
            }
        }
    }

    while (bytes > 0) {
        egdbuf[0] = 1;
        egdbuf[1] = bytes < 255 ? bytes : 255;
        numbytes = 0;
        while (numbytes != 2) {
            num = write(fd, egdbuf + numbytes, 2 - numbytes);
            if (num >= 0)
                numbytes += num;
            else {
                switch (errno) {
# ifdef EINTR
                case EINTR:
# endif
# ifdef EAGAIN
                case EAGAIN:
# endif
                    /* No error, try again */
                    break;
                default:
                    ret = -1;
                    goto err;   /* failure */
                }
            }
        }
        numbytes = 0;
        while (numbytes != 1) {
            num = read(fd, egdbuf, 1);
            if (num == 0)
                goto err;       /* descriptor closed */
            else if (num > 0)
                numbytes += num;
            else {
                switch (errno) {
# ifdef EINTR
                case EINTR:
# endif
# ifdef EAGAIN
                case EAGAIN:
# endif
                    /* No error, try again */
                    break;
                default:
                    ret = -1;
                    goto err;   /* failure */
                }
            }
        }
        if (egdbuf[0] == 0)
            goto err;
        if (buf)
            retrievebuf = buf + ret;
        else
            retrievebuf = tempbuf;
        numbytes = 0;
        while (numbytes != egdbuf[0]) {
            num = read(fd, retrievebuf + numbytes, egdbuf[0] - numbytes);
            if (num == 0)
                goto err;       /* descriptor closed */
            else if (num > 0)
                numbytes += num;
            else {
                switch (errno) {
# ifdef EINTR
                case EINTR:
# endif
# ifdef EAGAIN
                case EAGAIN:
# endif
                    /* No error, try again */
                    break;
                default:
                    ret = -1;
                    goto err;   /* failure */
                }
            }
        }
        ret += egdbuf[0];
        bytes -= egdbuf[0];
        if (!buf)
            RAND_seed(tempbuf, egdbuf[0]);
    }
 err:
    if (fd != -1)
        close(fd);
    return (ret);
}

int RAND_egd_bytes(const char *path, int bytes)
{
    int num, ret = 0;

    num = RAND_query_egd_bytes(path, NULL, bytes);
    if (num < 1)
        goto err;
    if (RAND_status() == 1)
        ret = num;
 err:
    return (ret);
}

int RAND_egd(const char *path)
{
    return (RAND_egd_bytes(path, 255));
}

#endif

Coverage Report

Created: 2022-11-30 06:20

Line	Count	Source (jump to first uncovered line)
1		/* crypto/rand/rand_egd.c */
2		/* Written by Ulf Moeller and Lutz Jaenicke for the OpenSSL project. */
3		/* ====================================================================
4		* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
5		*
6		* Redistribution and use in source and binary forms, with or without
7		* modification, are permitted provided that the following conditions
8		* are met:
9		*
10		* 1. Redistributions of source code must retain the above copyright
11		* notice, this list of conditions and the following disclaimer.
12		*
13		* 2. Redistributions in binary form must reproduce the above copyright
14		* notice, this list of conditions and the following disclaimer in
15		* the documentation and/or other materials provided with the
16		* distribution.
17		*
18		* 3. All advertising materials mentioning features or use of this
19		* software must display the following acknowledgment:
20		* "This product includes software developed by the OpenSSL Project
21		* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
22		*
23		* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
24		* endorse or promote products derived from this software without
25		* prior written permission. For written permission, please contact
26		* openssl-core@openssl.org.
27		*
28		* 5. Products derived from this software may not be called "OpenSSL"
29		* nor may "OpenSSL" appear in their names without prior written
30		* permission of the OpenSSL Project.
31		*
32		* 6. Redistributions of any form whatsoever must retain the following
33		* acknowledgment:
34		* "This product includes software developed by the OpenSSL Project
35		* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
36		*
37		* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
38		* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
40		* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
41		* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42		* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
43		* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
44		* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
46		* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
47		* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
48		* OF THE POSSIBILITY OF SUCH DAMAGE.
49		* ====================================================================
50		*
51		* This product includes cryptographic software written by Eric Young
52		* (eay@cryptsoft.com). This product includes software written by Tim
53		* Hudson (tjh@cryptsoft.com).
54		*
55		*/
56
57		#include <openssl/e_os2.h>
58		#include <openssl/rand.h>
59		#include <openssl/buffer.h>
60
61		/*-
62		* Query the EGD <URL: http://www.lothar.com/tech/crypto/>.
63		*
64		* This module supplies three routines:
65		*
66		* RAND_query_egd_bytes(path, buf, bytes)
67		* will actually query "bytes" bytes of entropy form the egd-socket located
68		* at path and will write them to buf (if supplied) or will directly feed
69		* it to RAND_seed() if buf==NULL.
70		* The number of bytes is not limited by the maximum chunk size of EGD,
71		* which is 255 bytes. If more than 255 bytes are wanted, several chunks
72		* of entropy bytes are requested. The connection is left open until the
73		* query is competed.
74		* RAND_query_egd_bytes() returns with
75		* -1 if an error occured during connection or communication.
76		* num the number of bytes read from the EGD socket. This number is either
77		* the number of bytes requested or smaller, if the EGD pool is
78		* drained and the daemon signals that the pool is empty.
79		* This routine does not touch any RAND_status(). This is necessary, since
80		* PRNG functions may call it during initialization.
81		*
82		* RAND_egd_bytes(path, bytes) will query "bytes" bytes and have them
83		* used to seed the PRNG.
84		* RAND_egd_bytes() is a wrapper for RAND_query_egd_bytes() with buf=NULL.
85		* Unlike RAND_query_egd_bytes(), RAND_status() is used to test the
86		* seed status so that the return value can reflect the seed state:
87		* -1 if an error occured during connection or communication _or_
88		* if the PRNG has still not received the required seeding.
89		* num the number of bytes read from the EGD socket. This number is either
90		* the number of bytes requested or smaller, if the EGD pool is
91		* drained and the daemon signals that the pool is empty.
92		*
93		* RAND_egd(path) will query 255 bytes and use the bytes retreived to seed
94		* the PRNG.
95		* RAND_egd() is a wrapper for RAND_egd_bytes() with numbytes=255.
96		*/
97
98		#if defined(OPENSSL_SYS_WIN32) \|\| defined(OPENSSL_SYS_VMS) \|\| defined(OPENSSL_SYS_MSDOS) \|\| defined(OPENSSL_SYS_VXWORKS) \|\| defined(OPENSSL_SYS_NETWARE) \|\| defined(OPENSSL_SYS_VOS) \|\| defined(OPENSSL_SYS_BEOS)
99		int RAND_query_egd_bytes(const char path, unsigned char buf, int bytes)
100		{
101		return (-1);
102		}
103
104		int RAND_egd(const char *path)
105		{
106		return (-1);
107		}
108
109		int RAND_egd_bytes(const char *path, int bytes)
110		{
111		return (-1);
112		}
113		#else
114		# include <openssl/opensslconf.h>
115		# include OPENSSL_UNISTD
116		# include <stddef.h>
117		# include <sys/types.h>
118		# include <sys/socket.h>
119		# ifndef NO_SYS_UN_H
120		# ifdef OPENSSL_SYS_VXWORKS
121		# include <streams/un.h>
122		# else
123		# include <sys/un.h>
124		# endif
125		# else
126		struct sockaddr_un {
127		short sun_family; /* AF_UNIX */
128		char sun_path[108]; /* path name (gag) */
129		};
130		# endif /* NO_SYS_UN_H */
131		# include <string.h>
132		# include <errno.h>
133
134		# ifndef offsetof
135		# define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
136		# endif
137
138		int RAND_query_egd_bytes(const char path, unsigned char buf, int bytes)
139	0	{
140	0	int ret = 0;
141	0	struct sockaddr_un addr;
142	0	int len, num, numbytes;
143	0	int fd = -1;
144	0	int success;
145	0	unsigned char egdbuf[2], tempbuf[255], *retrievebuf;
146
147	0	memset(&addr, 0, sizeof(addr));
148	0	addr.sun_family = AF_UNIX;
149	0	if (strlen(path) >= sizeof(addr.sun_path))
150	0	return (-1);
151	0	BUF_strlcpy(addr.sun_path, path, sizeof addr.sun_path);
152	0	len = offsetof(struct sockaddr_un, sun_path) + strlen(path);
153	0	fd = socket(AF_UNIX, SOCK_STREAM, 0);
154	0	if (fd == -1)
155	0	return (-1);
156	0	success = 0;
157	0	while (!success) {
158	0	if (connect(fd, (struct sockaddr *)&addr, len) == 0)
159	0	success = 1;
160	0	else {
161	0	switch (errno) {
162	0	# ifdef EINTR
163	0	case EINTR:
164	0	# endif
165	0	# ifdef EAGAIN
166	0	case EAGAIN:
167	0	# endif
168	0	# ifdef EINPROGRESS
169	0	case EINPROGRESS:
170	0	# endif
171	0	# ifdef EALREADY
172	0	case EALREADY:
173	0	# endif
174		/* No error, try again */
175	0	break;
176	0	# ifdef EISCONN
177	0	case EISCONN:
178	0	success = 1;
179	0	break;
180	0	# endif
181	0	default:
182	0	goto err; /* failure */
183	0	}
184	0	}
185	0	}
186
187	0	while (bytes > 0) {
188	0	egdbuf[0] = 1;
189	0	egdbuf[1] = bytes < 255 ? bytes : 255;
190	0	numbytes = 0;
191	0	while (numbytes != 2) {
192	0	num = write(fd, egdbuf + numbytes, 2 - numbytes);
193	0	if (num >= 0)
194	0	numbytes += num;
195	0	else {
196	0	switch (errno) {
197	0	# ifdef EINTR
198	0	case EINTR:
199	0	# endif
200	0	# ifdef EAGAIN
201	0	case EAGAIN:
202	0	# endif
203		/* No error, try again */
204	0	break;
205	0	default:
206	0	ret = -1;
207	0	goto err; /* failure */
208	0	}
209	0	}
210	0	}
211	0	numbytes = 0;
212	0	while (numbytes != 1) {
213	0	num = read(fd, egdbuf, 1);
214	0	if (num == 0)
215	0	goto err; /* descriptor closed */
216	0	else if (num > 0)
217	0	numbytes += num;
218	0	else {
219	0	switch (errno) {
220	0	# ifdef EINTR
221	0	case EINTR:
222	0	# endif
223	0	# ifdef EAGAIN
224	0	case EAGAIN:
225	0	# endif
226		/* No error, try again */
227	0	break;
228	0	default:
229	0	ret = -1;
230	0	goto err; /* failure */
231	0	}
232	0	}
233	0	}
234	0	if (egdbuf[0] == 0)
235	0	goto err;
236	0	if (buf)
237	0	retrievebuf = buf + ret;
238	0	else
239	0	retrievebuf = tempbuf;
240	0	numbytes = 0;
241	0	while (numbytes != egdbuf[0]) {
242	0	num = read(fd, retrievebuf + numbytes, egdbuf[0] - numbytes);
243	0	if (num == 0)
244	0	goto err; /* descriptor closed */
245	0	else if (num > 0)
246	0	numbytes += num;
247	0	else {
248	0	switch (errno) {
249	0	# ifdef EINTR
250	0	case EINTR:
251	0	# endif
252	0	# ifdef EAGAIN
253	0	case EAGAIN:
254	0	# endif
255		/* No error, try again */
256	0	break;
257	0	default:
258	0	ret = -1;
259	0	goto err; /* failure */
260	0	}
261	0	}
262	0	}
263	0	ret += egdbuf[0];
264	0	bytes -= egdbuf[0];
265	0	if (!buf)
266	0	RAND_seed(tempbuf, egdbuf[0]);
267	0	}
268	0	err:
269	0	if (fd != -1)
270	0	close(fd);
271	0	return (ret);
272	0	}
273
274		int RAND_egd_bytes(const char *path, int bytes)
275	0	{
276	0	int num, ret = 0;
277
278	0	num = RAND_query_egd_bytes(path, NULL, bytes);
279	0	if (num < 1)
280	0	goto err;
281	0	if (RAND_status() == 1)
282	0	ret = num;
283	0	err:
284	0	return (ret);
285	0	}
286
287		int RAND_egd(const char *path)
288	0	{
289	0	return (RAND_egd_bytes(path, 255));
290	0	}
291
292		#endif