--- /dev/null
+/* 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_VOS)
+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 <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
projects / bcm963xx.git / blobdiff