1 files changed, 117 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/store_mem.c b/crypto/heimdal/lib/krb5/store_mem.c
new file mode 100644
index 0000000..a8019e6
--- /dev/null
+++ b/crypto/heimdal/lib/krb5/store_mem.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 1997, 1998, 1999 Kungliga Tekniska Högskolan
+ * (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. 
+ */
+
+#include "krb5_locl.h"
+
+RCSID("$Id: store_mem.c,v 1.9 1999/12/02 17:05:13 joda Exp $");
+
+typedef struct mem_storage{
+    unsigned char *base;
+    size_t size;
+    unsigned char *ptr;
+}mem_storage;
+
+static ssize_t
+mem_fetch(krb5_storage *sp, void *data, size_t size)
+{
+    mem_storage *s = (mem_storage*)sp->data;
+    if(size > s->base + s->size - s->ptr)
+	size = s->base + s->size - s->ptr;
+    memmove(data, s->ptr, size);
+    sp->seek(sp, size, SEEK_CUR);
+    return size;
+}
+
+static ssize_t
+mem_store(krb5_storage *sp, void *data, size_t size)
+{
+    mem_storage *s = (mem_storage*)sp->data;
+    if(size > s->base + s->size - s->ptr)
+	size = s->base + s->size - s->ptr;
+    memmove(s->ptr, data, size);
+    sp->seek(sp, size, SEEK_CUR);
+    return size;
+}
+
+static off_t
+mem_seek(krb5_storage *sp, off_t offset, int whence)
+{
+    mem_storage *s = (mem_storage*)sp->data;
+    switch(whence){
+    case SEEK_SET:
+	if(offset > s->size)
+	    offset = s->size;
+	if(offset < 0)
+	    offset = 0;
+	s->ptr = s->base + offset;
+	break;
+    case SEEK_CUR:
+	return sp->seek(sp, s->ptr - s->base + offset, SEEK_SET);
+    case SEEK_END:
+	return sp->seek(sp, s->size + offset, SEEK_SET);
+    default:
+	errno = EINVAL;
+	return -1;
+    }
+    return s->ptr - s->base;
+}
+
+krb5_storage *
+krb5_storage_from_mem(void *buf, size_t len)
+{
+    krb5_storage *sp = malloc(sizeof(krb5_storage));
+    mem_storage *s;
+    if(sp == NULL)
+	return NULL;
+    s = malloc(sizeof(*s));
+    if(s == NULL) {
+	free(sp);
+	return NULL;
+    }
+    sp->data = s;
+    sp->flags = 0;
+    s->base = buf;
+    s->size = len;
+    s->ptr = buf;
+    sp->fetch = mem_fetch;
+    sp->store = mem_store;
+    sp->seek = mem_seek;
+    sp->free = NULL;
+    return sp;
+}
+
+krb5_storage *
+krb5_storage_from_data(krb5_data *data)
+{
+	return krb5_storage_from_mem(data->data, data->length);
+}