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| author | cvs2svn <admin@example.com> | 2002-05-15 02:29:23 +0000 |
|---|---|---|
| committer | cvs2svn <admin@example.com> | 2002-05-15 02:29:23 +0000 |
| commit | fd9566423b542798f5c8b06e68101a9ea5bb9885 (patch) | |
| tree | f2cc037857a260afc5aaaaaa6cf62d06923c6273 /src/lib/libcrypto/rand/rand_unix.c | |
| parent | 536c76cbb863bab152f19842ab88772c01e922c7 (diff) | |
| download | openbsd-fd9566423b542798f5c8b06e68101a9ea5bb9885.tar.gz openbsd-fd9566423b542798f5c8b06e68101a9ea5bb9885.tar.bz2 openbsd-fd9566423b542798f5c8b06e68101a9ea5bb9885.zip | |
This commit was manufactured by cvs2git to create branch 'openssl'.
Diffstat (limited to 'src/lib/libcrypto/rand/rand_unix.c')
| -rw-r--r-- | src/lib/libcrypto/rand/rand_unix.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/src/lib/libcrypto/rand/rand_unix.c b/src/lib/libcrypto/rand/rand_unix.c new file mode 100644 index 0000000000..0b29235130 --- /dev/null +++ b/src/lib/libcrypto/rand/rand_unix.c | |||
| @@ -0,0 +1,274 @@ | |||
| 1 | /* crypto/rand/rand_unix.c */ | ||
| 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 | * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. | ||
| 60 | * | ||
| 61 | * Redistribution and use in source and binary forms, with or without | ||
| 62 | * modification, are permitted provided that the following conditions | ||
| 63 | * are met: | ||
| 64 | * | ||
| 65 | * 1. Redistributions of source code must retain the above copyright | ||
| 66 | * notice, this list of conditions and the following disclaimer. | ||
| 67 | * | ||
| 68 | * 2. Redistributions in binary form must reproduce the above copyright | ||
| 69 | * notice, this list of conditions and the following disclaimer in | ||
| 70 | * the documentation and/or other materials provided with the | ||
| 71 | * distribution. | ||
| 72 | * | ||
| 73 | * 3. All advertising materials mentioning features or use of this | ||
| 74 | * software must display the following acknowledgment: | ||
| 75 | * "This product includes software developed by the OpenSSL Project | ||
| 76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | ||
| 77 | * | ||
| 78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | ||
| 79 | * endorse or promote products derived from this software without | ||
| 80 | * prior written permission. For written permission, please contact | ||
| 81 | * openssl-core@openssl.org. | ||
| 82 | * | ||
| 83 | * 5. Products derived from this software may not be called "OpenSSL" | ||
| 84 | * nor may "OpenSSL" appear in their names without prior written | ||
| 85 | * permission of the OpenSSL Project. | ||
| 86 | * | ||
| 87 | * 6. Redistributions of any form whatsoever must retain the following | ||
| 88 | * acknowledgment: | ||
| 89 | * "This product includes software developed by the OpenSSL Project | ||
| 90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | ||
| 91 | * | ||
| 92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | ||
| 93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| 94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | ||
| 95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | ||
| 96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| 97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | ||
| 98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
| 99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
| 100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | ||
| 101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
| 102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | ||
| 103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| 104 | * ==================================================================== | ||
| 105 | * | ||
| 106 | * This product includes cryptographic software written by Eric Young | ||
| 107 | * (eay@cryptsoft.com). This product includes software written by Tim | ||
| 108 | * Hudson (tjh@cryptsoft.com). | ||
| 109 | * | ||
| 110 | */ | ||
| 111 | |||
| 112 | #include "cryptlib.h" | ||
| 113 | #include <openssl/rand.h> | ||
| 114 | #include "rand_lcl.h" | ||
| 115 | |||
| 116 | #if !(defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_OS2)) | ||
| 117 | |||
| 118 | #include <sys/types.h> | ||
| 119 | #include <sys/time.h> | ||
| 120 | #include <sys/times.h> | ||
| 121 | #include <fcntl.h> | ||
| 122 | #include <unistd.h> | ||
| 123 | #include <time.h> | ||
| 124 | |||
| 125 | #ifdef __OpenBSD__ | ||
| 126 | #undef DEVRANDOM | ||
| 127 | #define DEVRANDOM "/dev/arandom" | ||
| 128 | int RAND_poll(void) | ||
| 129 | { | ||
| 130 | unsigned long l; | ||
| 131 | pid_t curr_pid = getpid(); | ||
| 132 | FILE *fh; | ||
| 133 | |||
| 134 | /* Use a random entropy pool device. Linux, FreeBSD and OpenBSD | ||
| 135 | * have this. Use /dev/urandom if you can as /dev/random may block | ||
| 136 | * if it runs out of random entries. */ | ||
| 137 | |||
| 138 | if ((fh = fopen(DEVRANDOM, "r")) != NULL) | ||
| 139 | { | ||
| 140 | unsigned char tmpbuf[ENTROPY_NEEDED]; | ||
| 141 | int n; | ||
| 142 | |||
| 143 | setvbuf(fh, NULL, _IONBF, 0); | ||
| 144 | n=fread((unsigned char *)tmpbuf,1,ENTROPY_NEEDED,fh); | ||
| 145 | fclose(fh); | ||
| 146 | RAND_add(tmpbuf,sizeof tmpbuf,n); | ||
| 147 | memset(tmpbuf,0,n); | ||
| 148 | } | ||
| 149 | |||
| 150 | /* put in some default random data, we need more than just this */ | ||
| 151 | l=curr_pid; | ||
| 152 | RAND_add(&l,sizeof(l),0); | ||
| 153 | l=getuid(); | ||
| 154 | RAND_add(&l,sizeof(l),0); | ||
| 155 | |||
| 156 | l=time(NULL); | ||
| 157 | RAND_add(&l,sizeof(l),0); | ||
| 158 | |||
| 159 | return 1; | ||
| 160 | } | ||
| 161 | #else | ||
| 162 | int RAND_poll(void) | ||
| 163 | { | ||
| 164 | unsigned long l; | ||
| 165 | pid_t curr_pid = getpid(); | ||
| 166 | #if defined(DEVRANDOM) || defined(DEVRANDOM_EGD) | ||
| 167 | unsigned char tmpbuf[ENTROPY_NEEDED]; | ||
| 168 | int n = 0; | ||
| 169 | #endif | ||
| 170 | #ifdef DEVRANDOM | ||
| 171 | static const char *randomfiles[] = { DEVRANDOM, NULL }; | ||
| 172 | const char **randomfile = NULL; | ||
| 173 | int fd; | ||
| 174 | #endif | ||
| 175 | #ifdef DEVRANDOM_EGD | ||
| 176 | static const char *egdsockets[] = { DEVRANDOM_EGD, NULL }; | ||
| 177 | const char **egdsocket = NULL; | ||
| 178 | #endif | ||
| 179 | |||
| 180 | #ifdef DEVRANDOM | ||
| 181 | /* Use a random entropy pool device. Linux, FreeBSD and OpenBSD | ||
| 182 | * have this. Use /dev/urandom if you can as /dev/random may block | ||
| 183 | * if it runs out of random entries. */ | ||
| 184 | |||
| 185 | for (randomfile = randomfiles; *randomfile && n < ENTROPY_NEEDED; randomfile++) | ||
| 186 | { | ||
| 187 | if ((fd = open(*randomfile, O_RDONLY|O_NONBLOCK | ||
| 188 | #ifdef O_NOCTTY /* If it happens to be a TTY (god forbid), do not make it | ||
| 189 | our controlling tty */ | ||
| 190 | |O_NOCTTY | ||
| 191 | #endif | ||
| 192 | #ifdef O_NOFOLLOW /* Fail if the file is a symbolic link */ | ||
| 193 | |O_NOFOLLOW | ||
| 194 | #endif | ||
| 195 | )) >= 0) | ||
| 196 | { | ||
| 197 | struct timeval t = { 0, 10*1000 }; /* Spend 10ms on | ||
| 198 | each file. */ | ||
| 199 | int r; | ||
| 200 | fd_set fset; | ||
| 201 | |||
| 202 | do | ||
| 203 | { | ||
| 204 | FD_ZERO(&fset); | ||
| 205 | FD_SET(fd, &fset); | ||
| 206 | r = -1; | ||
| 207 | |||
| 208 | if (select(fd+1,&fset,NULL,NULL,&t) < 0) | ||
| 209 | t.tv_usec=0; | ||
| 210 | else if (FD_ISSET(fd, &fset)) | ||
| 211 | { | ||
| 212 | r=read(fd,(unsigned char *)tmpbuf+n, | ||
| 213 | ENTROPY_NEEDED-n); | ||
| 214 | if (r > 0) | ||
| 215 | n += r; | ||
| 216 | } | ||
| 217 | |||
| 218 | /* Some Unixen will update t, some | ||
| 219 | won't. For those who won't, give | ||
| 220 | up here, otherwise, we will do | ||
| 221 | this once again for the remaining | ||
| 222 | time. */ | ||
| 223 | if (t.tv_usec == 10*1000) | ||
| 224 | t.tv_usec=0; | ||
| 225 | } | ||
| 226 | while ((r > 0 || (errno == EINTR || errno == EAGAIN)) | ||
| 227 | && t.tv_usec != 0 && n < ENTROPY_NEEDED); | ||
| 228 | |||
| 229 | close(fd); | ||
| 230 | } | ||
| 231 | } | ||
| 232 | #endif | ||
| 233 | |||
| 234 | #ifdef DEVRANDOM_EGD | ||
| 235 | /* Use an EGD socket to read entropy from an EGD or PRNGD entropy | ||
| 236 | * collecting daemon. */ | ||
| 237 | |||
| 238 | for (egdsocket = egdsockets; *egdsocket && n < ENTROPY_NEEDED; egdsocket++) | ||
| 239 | { | ||
| 240 | int r; | ||
| 241 | |||
| 242 | r = RAND_query_egd_bytes(*egdsocket, (unsigned char *)tmpbuf+n, | ||
| 243 | ENTROPY_NEEDED-n); | ||
| 244 | if (r > 0) | ||
| 245 | n += r; | ||
| 246 | } | ||
| 247 | #endif | ||
| 248 | |||
| 249 | #if defined(DEVRANDOM) || defined(DEVRANDOM_EGD) | ||
| 250 | if (n > 0) | ||
| 251 | { | ||
| 252 | RAND_add(tmpbuf,sizeof tmpbuf,n); | ||
| 253 | memset(tmpbuf,0,n); | ||
| 254 | } | ||
| 255 | #endif | ||
| 256 | |||
| 257 | /* put in some default random data, we need more than just this */ | ||
| 258 | l=curr_pid; | ||
| 259 | RAND_add(&l,sizeof(l),0); | ||
| 260 | l=getuid(); | ||
| 261 | RAND_add(&l,sizeof(l),0); | ||
| 262 | |||
| 263 | l=time(NULL); | ||
| 264 | RAND_add(&l,sizeof(l),0); | ||
| 265 | |||
| 266 | #if defined(DEVRANDOM) || defined(DEVRANDOM_EGD) | ||
| 267 | return 1; | ||
| 268 | #else | ||
| 269 | return 0; | ||
| 270 | #endif | ||
| 271 | } | ||
| 272 | |||
| 273 | #endif | ||
| 274 | #endif | ||
