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Diffstat (limited to 'pki/base/native-tools/src/setpin/b64.c')
-rw-r--r--pki/base/native-tools/src/setpin/b64.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/pki/base/native-tools/src/setpin/b64.c b/pki/base/native-tools/src/setpin/b64.c
new file mode 100644
index 0000000..1c20f37
--- /dev/null
+++ b/pki/base/native-tools/src/setpin/b64.c
@@ -0,0 +1,102 @@
+/* --- BEGIN COPYRIGHT BLOCK ---
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Copyright (C) 2007 Red Hat, Inc.
+ * All rights reserved.
+ * --- END COPYRIGHT BLOCK ---
+ */
+
+
+
+
+
+
+
+static char nib2b64[0x40f] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+
+
+static int
+ldif_base64_encode_internal( unsigned char *src, char *dst, int srclen, int lenused, int wraplen )
+{
+ unsigned char *byte, *stop;
+ unsigned char buf[3];
+ char *out;
+ unsigned long bits;
+ int i, pad, len;
+
+ len = 0;
+ out = dst;
+ stop = src + srclen;
+
+ /* convert to base 64 (3 bytes => 4 base 64 digits) */
+ for ( byte = src; byte < stop - 2; byte += 3 ) {
+ bits = (byte[0] & 0xff) << 16;
+ bits |= (byte[1] & 0xff) << 8;
+ bits |= (byte[2] & 0xff);
+
+ for ( i = 0; i < 4; i++, bits <<= 6 ) {
+ if ( wraplen != -1 && lenused >= 0 && lenused++ > wraplen ) {
+ *out++ = '\n';
+ *out++ = ' ';
+ lenused = 2;
+ }
+
+ /* get b64 digit from high order 6 bits */
+ *out++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
+ }
+ }
+ /* add padding if necessary */
+ if ( byte < stop ) {
+ for ( i = 0; byte + i < stop; i++ ) {
+ buf[i] = byte[i];
+ }
+ for ( pad = 0; i < 3; i++, pad++ ) {
+ buf[i] = '\0';
+ }
+ byte = buf;
+ bits = (byte[0] & 0xff) << 16;
+ bits |= (byte[1] & 0xff) << 8;
+ bits |= (byte[2] & 0xff);
+
+ for ( i = 0; i < 4; i++, bits <<= 6 ) {
+ if ( wraplen != -1 && lenused >= 0 && lenused++ > wraplen ) {
+ *out++ = '\n';
+ *out++ = ' ';
+ lenused = 2;
+ }
+
+ if (( i == 3 && pad > 0 ) || ( i == 2 && pad == 2 )) {
+ /* Pad as appropriate */
+ *out++ = '=';
+ } else {
+ /* get b64 digit from low order 6 bits */
+ *out++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
+ }
+ }
+ }
+
+ *out = '\0';
+
+ return( out - dst );
+}
+
+
+int
+ldif_base64_encode( unsigned char *src, char *dst, int srclen, int lenused )
+{
+ return ldif_base64_encode_internal( src, dst, srclen, lenused, 200);
+}
+