1 files changed, 108 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/roken/hex.c b/third_party/heimdal/lib/roken/hex.c
new file mode 100644
index 0000000..5cd2026
--- /dev/null
+++ b/third_party/heimdal/lib/roken/hex.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2004-2005 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 <config.h>
+#include "roken.h"
+#include <ctype.h>
+#include "hex.h"
+
+static const char hexchar[16] = "0123456789ABCDEF";
+
+static inline int
+pos(char c)
+{
+    if (c >= '0' && c <= '9')
+        return c - '0';
+    if (c >= 'A' && c <= 'F')
+        return 10 + c - 'A';
+    if (c >= 'a' && c <= 'f')
+        return 10 + c - 'a';
+    return -1;
+}
+
+ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
+hex_encode(const void *data, size_t size, char **str)
+{
+    const unsigned char *q = data;
+    size_t i;
+    char *p;
+
+    p = calloc(size + 1, 2);
+    if (p == NULL) {
+        *str = NULL;
+	return -1;
+    }
+
+    for (i = 0; i < size; i++) {
+	p[i * 2] = hexchar[(*q >> 4) & 0xf];
+	p[i * 2 + 1] = hexchar[*q & 0xf];
+	q++;
+    }
+    p[i * 2] = '\0';
+    *str = p;
+
+    return i * 2;
+}
+
+ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
+hex_decode(const char *str, void *data, size_t len)
+{
+    size_t l;
+    unsigned char *p = data;
+    size_t i;
+    int d;
+
+    l = strlen(str);
+
+    /* check for overflow, same as (l+1)/2 but overflow safe */
+    if ((l/2) + (l&1) > len)
+	return -1;
+
+    if (l & 1) {
+        if ((d = pos(str[0])) == -1)
+            return -1;
+	p[0] = d;
+	str++;
+	p++;
+    }
+    for (i = 0; i < l / 2; i++) {
+        if ((d = pos(str[i * 2])) == -1)
+            return -1;
+	p[i] = d << 4;
+        if ((d = pos(str[(i * 2) + 1])) == -1)
+            return -1;
+	p[i] |= d;
+    }
+    return i + (l & 1);
+}