r20640: Commit part 2/2

[sfrench/samba-autobuild/.git] / source4 / heimdal / lib / hx509 / file.c

diff --git a/source4/heimdal/lib/hx509/file.c b/source4/heimdal/lib/hx509/file.c
new file mode 100644 (file)
index 0000000..39497fc
--- /dev/null
+++ b/source4/heimdal/lib/hx509/file.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2005 - 2006 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 "hx_locl.h"
+RCSID("$ID$");
+
+int
+_hx509_map_file(const char *fn, void **data, size_t *length, struct stat *rsb)
+{
+    struct stat sb;
+    size_t len;
+    ssize_t l;
+    int ret;
+    void *d;
+    int fd;
+
+    *data = NULL;
+    *length = 0;
+
+    fd = open(fn, O_RDONLY);
+    if (fd < 0)
+       return errno;
+    
+    if (fstat(fd, &sb) < 0) {
+       ret = errno;
+       close(fd);
+       return ret;
+    }
+
+    len = sb.st_size;
+
+    d = malloc(len);
+    if (d == NULL) {
+       close(fd);
+       return ENOMEM;
+    }
+    
+    l = read(fd, d, len);
+    close(fd);
+    if (l < 0 || l != len) {
+       free(d);
+       return EINVAL;
+    }
+
+    if (rsb)
+       *rsb = sb;
+    *data = d;
+    *length = len;
+    return 0;
+}
+
+void
+_hx509_unmap_file(void *data, size_t len)
+{
+    free(data);
+}
+
+int
+_hx509_write_file(const char *fn, const void *data, size_t length)
+{
+    ssize_t sz;
+    const unsigned char *p = data;
+    int fd;
+
+    fd = open(fn, O_WRONLY|O_TRUNC|O_CREAT, 0644);
+    if (fd < 0)
+       return errno;
+
+    do {
+       sz = write(fd, p, length);
+       if (sz < 0) {
+           int saved_errno = errno;
+           close(fd);
+           return saved_errno;
+       }
+       if (sz == 0)
+           break;
+       length -= sz;
+    } while (length > 0);
+               
+    if (close(fd) == -1)
+       return errno;
+
+    return 0;
+}