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authorHenryk Plötz <henryk@ploetzli.ch>2014-10-03 20:22:01 +0200
committerHenryk Plötz <henryk@ploetzli.ch>2014-10-03 20:29:44 +0200
commit7f632c0640f174bbbc1deb532e3a3977d595d28a (patch)
tree3df92847b2e58d2ced6daa00222fb77458023593 /base32hex.c
parenteaaa5b4f9301ae2e5a29dd77616d8e29fd3b2c28 (diff)
downloadtinydnssec-7f632c0640f174bbbc1deb532e3a3977d595d28a.tar.gz
tinydnssec-7f632c0640f174bbbc1deb532e3a3977d595d28a.tar.bz2
Apply djbdns-1.05-dnssec.patch
SHA1 62e2ce1d31f1fe908fac84fc8bd049a12621810f, contained in tinydnssec-1.05-1.3.tar.bz2 Source was http://www.tinydnssec.org/download/tinydnssec-1.05-1.3.tar.bz2, SHA1 b33d5c3e0de67f6427aad8c00a99580b59804075
Diffstat (limited to 'base32hex.c')
-rw-r--r--base32hex.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/base32hex.c b/base32hex.c
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index 0000000..95826fd
--- /dev/null
+++ b/base32hex.c
@@ -0,0 +1,79 @@
+/* (C) 2012 Peter Conrad <conrad@quisquis.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "base32hex.h"
+
+#define to_32hex(c) ((c) < 10 ? (c) + '0' : (c) + 'a' - 10)
+
+/* out must point to a buffer of at least (len * 8 / 5) + 1 bytes.
+ * Encoded string is *not* padded.
+ * See RFC-4648. This implementation produces lowercase hex characters.
+ * Returns length of encoded string.
+ */
+unsigned int base32hex(char *out, uint8_t *in, unsigned int len) {
+int buf = 0, bits = 0;
+char *x = out;
+
+ while (len-- > 0) {
+ buf <<= 8;
+ buf |= *in++;
+ bits += 8;
+ while (bits >= 5) {
+ char c = (buf >> (bits - 5)) & 0x1f;
+ *x++ = to_32hex(c);
+ bits -= 5;
+ }
+ }
+ if (bits > 0) {
+ char c = (buf << (5 - bits)) & 0x1f;
+ *x++ = to_32hex(c);
+ }
+ return x - out;
+}
+
+#ifdef TEST
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void test(char *in, char *expected, int explen) {
+char buf[255];
+int r;
+
+ if ((r = base32hex(buf, in, strlen(in))) != explen) {
+ printf("Failed: b32h('%s') yields %d chars (expected %d)\n",
+ in, r, explen);
+ exit(1);
+ }
+ if (strncmp(buf, expected, r)) {
+ buf[r] = 0;
+ printf("Failed: b32h('%s') = '%s' (expected %s)\n",
+ in, buf, expected);
+ exit(1);
+ }
+}
+
+int main(int argc, char **argv) {
+ test("", "", 0);
+ test("f", "co", 2);
+ test("fo", "cpng", 4);
+ test("foo", "cpnmu", 5);
+ test("foob", "cpnmuog", 7);
+ test("fooba", "cpnmuoj1", 8);
+ test("foobar", "cpnmuoj1e8", 10);
+ printf("Success!\n");
+}
+
+#endif