rename des to hcrypto

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@20466 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/hcrypto/rand.c

@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 2006 - 2007 Kungliga Tekniska H<>gskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * 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. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS 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 INSTITUTE OR 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. 
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+RCSID("$Id$");
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <rand.h>
+#include <randi.h>
+
+#include <roken.h>
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+
+const static RAND_METHOD *selected_meth = NULL;
+
+static void
+init_method(void)
+{
+    if (selected_meth != NULL)
+	return;
+
+    if ((*hc_rand_unix_method.status)() == 1)
+	selected_meth = &hc_rand_unix_method;
+    else
+	selected_meth = &hc_rand_fortuna_method;
+}
+
+void
+RAND_seed(const void *indata, size_t size)
+{
+    init_method();
+    (*selected_meth->seed)(indata, size);
+}
+
+int
+RAND_bytes(void *outdata, size_t size)
+{
+    init_method();
+    return (*selected_meth->bytes)(outdata, size);
+}
+
+void
+RAND_cleanup(void)
+{
+    init_method();
+    (*selected_meth->cleanup)();
+}
+
+void
+RAND_add(const void *indata, size_t size, double entropi)
+{
+    init_method();
+    (*selected_meth->add)(indata, size, entropi);
+}
+
+int
+RAND_pseudo_bytes(void *outdata, size_t size)
+{
+    init_method();
+    return (*selected_meth->pseudorand)(outdata, size);
+}
+
+int
+RAND_status(void)
+{
+    init_method();
+    return (*selected_meth->status)();
+}
+
+int
+RAND_set_rand_method(const RAND_METHOD *meth)
+{
+    selected_meth = meth;
+    return 1;
+}
+
+const RAND_METHOD *
+RAND_get_rand_method(void)
+{
+    return selected_meth;
+}
+
+int
+RAND_set_rand_engine(ENGINE *engine)
+{
+    return 1;
+}
+
+#define RAND_FILE_SIZE 1024
+
+int
+RAND_load_file(const char *filename, size_t size)
+{
+    unsigned char buf[128];
+    size_t len;
+    ssize_t slen;
+    int fd;
+
+    fd = open(filename, O_RDONLY | O_BINARY, 0600);
+    if (fd < 0)
+	return 0;
+
+    len = 0;
+    while(len < size) {
+	slen = read(fd, buf, sizeof(buf));
+	if (slen <= 0)
+	    break;
+	RAND_seed(buf, slen);
+	len += slen;
+    }
+    close(fd);
+
+    return len ? 1 : 0;
+}
+
+int
+RAND_write_file(const char *filename)
+{
+    unsigned char buf[128];
+    size_t len;
+    int res = 0, fd;
+
+    fd = open(filename, O_WRONLY | O_CREAT | O_BINARY, 0600);
+    if (fd < 0)
+	return 0;
+
+    len = 0;
+    while(len < RAND_FILE_SIZE) {
+	res = RAND_bytes(buf, sizeof(buf));
+	if (res != 1)
+	    break;
+	if (write(fd, buf, sizeof(buf)) != sizeof(buf)) {
+	    res = 0;
+	    break;
+	}
+	len += sizeof(buf);
+    }
+
+    close(fd);
+
+    return res;
+}
+
+const char *
+RAND_file_name(char *filename, size_t size)
+{
+    const char *e = NULL;
+    int pathp = 0, ret;
+
+    if (!issuid()) {
+	e = getenv("RANDFILE");
+	if (e == NULL) {
+	    e = getenv("HOME");
+	    if (e)
+		pathp = 1;
+	}
+    }
+    if (e == NULL) {
+	struct passwd *pw = getpwuid(getuid());	
+	if (pw) {
+	    e = pw->pw_dir;
+	    pathp = 1;
+	}
+    }
+    if (e == NULL)
+	return NULL;
+
+    if (pathp)
+	ret = snprintf(filename, size, "%s/.rnd", e);
+    else
+	ret = snprintf(filename, size, "%s", e);
+
+    if (ret <= 0 || ret >= size)
+	return NULL;
+
+    return filename;
+}