/* crypto/rand/rand_egd.c */ /* Written by Ulf Moeller 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 /* Query the EGD . */ #if defined(WIN32) || defined(VMS) || defined(__VMS) int RAND_egd(const char *path) { return(-1); } int RAND_egd_bytes(const char *path,int bytes) { return(-1); } #else #include #include OPENSSL_UNISTD #include #include #ifndef NO_SYS_UN_H #include #else struct sockaddr_un { short sun_family; /* AF_UNIX */ char sun_path[108]; /* path name (gag) */ }; #endif /* NO_SYS_UN_H */ #include #ifndef offsetof # define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) #endif int RAND_egd(const char *path) { int ret = -1; struct sockaddr_un addr; int len, num; int fd = -1; unsigned char buf[256]; memset(&addr, 0, sizeof(addr)); addr.sun_family = AF_UNIX; if (strlen(path) > sizeof(addr.sun_path)) return (-1); strcpy(addr.sun_path,path); len = offsetof(struct sockaddr_un, sun_path) + strlen(path); fd = socket(AF_UNIX, SOCK_STREAM, 0); if (fd == -1) return (-1); if (connect(fd, (struct sockaddr *)&addr, len) == -1) goto err; buf[0] = 1; buf[1] = 255; write(fd, buf, 2); if (read(fd, buf, 1) != 1) goto err; if (buf[0] == 0) goto err; num = read(fd, buf, 255); if (num < 1) goto err; RAND_seed(buf, num); if (RAND_status() == 1) ret = num; err: if (fd != -1) close(fd); return(ret); } int RAND_egd_bytes(const char *path,int bytes) { int ret = 0; struct sockaddr_un addr; int len, num; int fd = -1; unsigned char buf[255]; memset(&addr, 0, sizeof(addr)); addr.sun_family = AF_UNIX; if (strlen(path) > sizeof(addr.sun_path)) return (-1); strcpy(addr.sun_path,path); len = offsetof(struct sockaddr_un, sun_path) + strlen(path); fd = socket(AF_UNIX, SOCK_STREAM, 0); if (fd == -1) return (-1); if (connect(fd, (struct sockaddr *)&addr, len) == -1) goto err; while(bytes > 0) { buf[0] = 1; buf[1] = bytes < 255 ? bytes : 255; write(fd, buf, 2); if (read(fd, buf, 1) != 1) { ret=-1; goto err; } if(buf[0] == 0) goto err; num = read(fd, buf, buf[0]); if (num < 1) { ret=-1; goto err; } RAND_seed(buf, num); if (RAND_status() != 1) { ret=-1; goto err; } ret += num; bytes-=num; } err: if (fd != -1) close(fd); return(ret); } #endif