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| 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_SY
S_MSDOS) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE) || defi
ned(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 int RAND_egd(const char *path) | |
| 104 { | |
| 105 return(-1); | |
| 106 } | |
| 107 | |
| 108 int RAND_egd_bytes(const char *path,int bytes) | |
| 109 { | |
| 110 return(-1); | |
| 111 } | |
| 112 #else | |
| 113 #include <openssl/opensslconf.h> | |
| 114 #include OPENSSL_UNISTD | |
| 115 #include <sys/types.h> | |
| 116 #include <sys/socket.h> | |
| 117 #ifndef NO_SYS_UN_H | |
| 118 # ifdef OPENSSL_SYS_VXWORKS | |
| 119 # include <streams/un.h> | |
| 120 # else | |
| 121 # include <sys/un.h> | |
| 122 # endif | |
| 123 #else | |
| 124 struct sockaddr_un { | |
| 125 short sun_family; /* AF_UNIX */ | |
| 126 char sun_path[108]; /* path name (gag) */ | |
| 127 }; | |
| 128 #endif /* NO_SYS_UN_H */ | |
| 129 #include <string.h> | |
| 130 #include <errno.h> | |
| 131 | |
| 132 #ifndef offsetof | |
| 133 # define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) | |
| 134 #endif | |
| 135 | |
| 136 int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes) | |
| 137 { | |
| 138 int ret = 0; | |
| 139 struct sockaddr_un addr; | |
| 140 int len, num, numbytes; | |
| 141 int fd = -1; | |
| 142 int success; | |
| 143 unsigned char egdbuf[2], tempbuf[255], *retrievebuf; | |
| 144 | |
| 145 memset(&addr, 0, sizeof(addr)); | |
| 146 addr.sun_family = AF_UNIX; | |
| 147 if (strlen(path) >= sizeof(addr.sun_path)) | |
| 148 return (-1); | |
| 149 BUF_strlcpy(addr.sun_path,path,sizeof addr.sun_path); | |
| 150 len = offsetof(struct sockaddr_un, sun_path) + strlen(path); | |
| 151 fd = socket(AF_UNIX, SOCK_STREAM, 0); | |
| 152 if (fd == -1) return (-1); | |
| 153 success = 0; | |
| 154 while (!success) | |
| 155 { | |
| 156 if (connect(fd, (struct sockaddr *)&addr, len) == 0) | |
| 157 success = 1; | |
| 158 else | |
| 159 { | |
| 160 switch (errno) | |
| 161 { | |
| 162 #ifdef EINTR | |
| 163 case EINTR: | |
| 164 #endif | |
| 165 #ifdef EAGAIN | |
| 166 case EAGAIN: | |
| 167 #endif | |
| 168 #ifdef EINPROGRESS | |
| 169 case EINPROGRESS: | |
| 170 #endif | |
| 171 #ifdef EALREADY | |
| 172 case EALREADY: | |
| 173 #endif | |
| 174 /* No error, try again */ | |
| 175 break; | |
| 176 #ifdef EISCONN | |
| 177 case EISCONN: | |
| 178 success = 1; | |
| 179 break; | |
| 180 #endif | |
| 181 default: | |
| 182 goto err; /* failure */ | |
| 183 } | |
| 184 } | |
| 185 } | |
| 186 | |
| 187 while(bytes > 0) | |
| 188 { | |
| 189 egdbuf[0] = 1; | |
| 190 egdbuf[1] = bytes < 255 ? bytes : 255; | |
| 191 numbytes = 0; | |
| 192 while (numbytes != 2) | |
| 193 { | |
| 194 num = write(fd, egdbuf + numbytes, 2 - numbytes); | |
| 195 if (num >= 0) | |
| 196 numbytes += num; | |
| 197 else | |
| 198 { | |
| 199 switch (errno) | |
| 200 { | |
| 201 #ifdef EINTR | |
| 202 case EINTR: | |
| 203 #endif | |
| 204 #ifdef EAGAIN | |
| 205 case EAGAIN: | |
| 206 #endif | |
| 207 /* No error, try again */ | |
| 208 break; | |
| 209 default: | |
| 210 ret = -1; | |
| 211 goto err; /* failure */ | |
| 212 } | |
| 213 } | |
| 214 } | |
| 215 numbytes = 0; | |
| 216 while (numbytes != 1) | |
| 217 { | |
| 218 num = read(fd, egdbuf, 1); | |
| 219 if (num == 0) | |
| 220 goto err; /* descriptor closed */ | |
| 221 else if (num > 0) | |
| 222 numbytes += num; | |
| 223 else | |
| 224 { | |
| 225 switch (errno) | |
| 226 { | |
| 227 #ifdef EINTR | |
| 228 case EINTR: | |
| 229 #endif | |
| 230 #ifdef EAGAIN | |
| 231 case EAGAIN: | |
| 232 #endif | |
| 233 /* No error, try again */ | |
| 234 break; | |
| 235 default: | |
| 236 ret = -1; | |
| 237 goto err; /* failure */ | |
| 238 } | |
| 239 } | |
| 240 } | |
| 241 if(egdbuf[0] == 0) | |
| 242 goto err; | |
| 243 if (buf) | |
| 244 retrievebuf = buf + ret; | |
| 245 else | |
| 246 retrievebuf = tempbuf; | |
| 247 numbytes = 0; | |
| 248 while (numbytes != egdbuf[0]) | |
| 249 { | |
| 250 num = read(fd, retrievebuf + numbytes, egdbuf[0] - numbytes); | |
| 251 if (num == 0) | |
| 252 goto err; /* descriptor closed */ | |
| 253 else if (num > 0) | |
| 254 numbytes += num; | |
| 255 else | |
| 256 { | |
| 257 switch (errno) | |
| 258 { | |
| 259 #ifdef EINTR | |
| 260 case EINTR: | |
| 261 #endif | |
| 262 #ifdef EAGAIN | |
| 263 case EAGAIN: | |
| 264 #endif | |
| 265 /* No error, try again */ | |
| 266 break; | |
| 267 default: | |
| 268 ret = -1; | |
| 269 goto err; /* failure */ | |
| 270 } | |
| 271 } | |
| 272 } | |
| 273 ret += egdbuf[0]; | |
| 274 bytes -= egdbuf[0]; | |
| 275 if (!buf) | |
| 276 RAND_seed(tempbuf, egdbuf[0]); | |
| 277 } | |
| 278 err: | |
| 279 if (fd != -1) close(fd); | |
| 280 return(ret); | |
| 281 } | |
| 282 | |
| 283 | |
| 284 int RAND_egd_bytes(const char *path, int bytes) | |
| 285 { | |
| 286 int num, ret = 0; | |
| 287 | |
| 288 num = RAND_query_egd_bytes(path, NULL, bytes); | |
| 289 if (num < 1) goto err; | |
| 290 if (RAND_status() == 1) | |
| 291 ret = num; | |
| 292 err: | |
| 293 return(ret); | |
| 294 } | |
| 295 | |
| 296 | |
| 297 int RAND_egd(const char *path) | |
| 298 { | |
| 299 return (RAND_egd_bytes(path, 255)); | |
| 300 } | |
| 301 | |
| 302 | |
| 303 #endif | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master