From 7c785284bdc99155ebfb2fb192fcfb05bbcaef14 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Love=20H=C3=B6rnquist=20=C3=85strand?= <lha@kth.se>
Date: Fri, 7 Oct 2005 03:49:16 +0000
Subject: [PATCH] Add parse and print functions for heim_integer.

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@16127 ec53bebd-3082-4978-b11e-865c3cabbd6b
---
 lib/asn1/Makefile.am  |  1 +
 lib/asn1/der.h        |  3 ++
 lib/asn1/der_format.c | 96 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 100 insertions(+)
 create mode 100644 lib/asn1/der_format.c

diff --git a/lib/asn1/Makefile.am b/lib/asn1/Makefile.am
index 7b31d446a..26e741621 100644
--- a/lib/asn1/Makefile.am
+++ b/lib/asn1/Makefile.am
@@ -358,6 +358,7 @@ libasn1_la_SOURCES =				\
 	der_length.c				\
 	der_copy.c				\
 	der_cmp.c				\
+	der_format.c				\
 	extra.c					\
 	timegm.c				\
 	$(BUILT_SOURCES)
diff --git a/lib/asn1/der.h b/lib/asn1/der.h
index eaecaa49d..b8306742e 100644
--- a/lib/asn1/der.h
+++ b/lib/asn1/der.h
@@ -240,4 +240,7 @@ int		der_get_type_num(const char *);
 const char *	der_get_tag_name(unsigned);
 int		der_get_tag_num(const char *);
 
+int		der_parse_hex_heim_integer(const char *, heim_integer *);
+int		der_print_hex_heim_integer(const heim_integer *, char **);
+
 #endif /* __DER_H__ */
diff --git a/lib/asn1/der_format.c b/lib/asn1/der_format.c
new file mode 100644
index 000000000..73d588dd0
--- /dev/null
+++ b/lib/asn1/der_format.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2005 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 "der_locl.h"
+#include <hex.h>
+
+RCSID("$Id$");
+
+int
+der_parse_hex_heim_integer (const char *p, heim_integer *data)
+{
+    ssize_t len;
+
+    data->length = 0;
+    data->negative = 0;
+    data->data = NULL;
+
+    if (*p == '-') {
+	p++;
+	data->negative = 1;
+    }
+
+    len = strlen(p);
+    if (len < 0)
+	return EINVAL;
+    
+    data->length = len / 2;
+    data->data = malloc(data->length);
+    if (data->data == NULL)
+	return ENOMEM;
+
+    len = hex_decode(p, data->data, data->length);
+    if (len < 0)
+	return EINVAL;
+
+    {
+	unsigned char *p = data->data;
+	while(*p == 0 && len > 0) {
+	    p++;
+	    len--;
+	}
+	data->length = len;
+	memmove(data->data, p, len);
+    }
+    return 0;
+}
+
+int
+der_print_hex_heim_integer (const heim_integer *data, char **p)
+{
+    ssize_t len;
+    char *q;
+
+    len = hex_encode(data->data, data->length, p);
+    if (len < 0)
+	return ENOMEM;
+
+    if (data->negative) {
+	len = asprintf(&q, "-%s", *p);
+	free(*p);
+	if (len < 0)
+	    return ENOMEM;
+	*p = q;
+    }
+    return 0;
+}