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-rw-r--r--lib/util/base64.c141
-rw-r--r--lib/util/util.h13
-rw-r--r--lib/util/util_str.c2
-rwxr-xr-xlib/util/wscript_build2
4 files changed, 155 insertions, 3 deletions
diff --git a/lib/util/base64.c b/lib/util/base64.c
new file mode 100644
index 0000000000..19ce2d1b85
--- /dev/null
+++ b/lib/util/base64.c
@@ -0,0 +1,141 @@
+/*
+ Unix SMB/CIFS implementation.
+ Samba utility functions
+
+ Copyright (C) Andrew Tridgell 1992-2001
+ Copyright (C) Simo Sorce 2001-2002
+ Copyright (C) Martin Pool 2003
+ Copyright (C) James Peach 2006
+ Copyright (C) Jeremy Allison 1992-2007
+
+ 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; either version 3 of the License, or
+ (at your option) any later version.
+
+ 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 "includes.h"
+
+static const char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+/**
+ * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
+ **/
+_PUBLIC_ DATA_BLOB base64_decode_data_blob(const char *s)
+{
+ int bit_offset, byte_offset, idx, i, n;
+ DATA_BLOB decoded = data_blob(s, strlen(s)+1);
+ unsigned char *d = decoded.data;
+ char *p;
+
+ n=i=0;
+
+ while (*s && (p=strchr_m(b64,*s))) {
+ idx = (int)(p - b64);
+ byte_offset = (i*6)/8;
+ bit_offset = (i*6)%8;
+ d[byte_offset] &= ~((1<<(8-bit_offset))-1);
+ if (bit_offset < 3) {
+ d[byte_offset] |= (idx << (2-bit_offset));
+ n = byte_offset+1;
+ } else {
+ d[byte_offset] |= (idx >> (bit_offset-2));
+ d[byte_offset+1] = 0;
+ d[byte_offset+1] |= (idx << (8-(bit_offset-2))) & 0xFF;
+ n = byte_offset+2;
+ }
+ s++; i++;
+ }
+
+ if ((n > 0) && (*s == '=')) {
+ n -= 1;
+ }
+
+ /* fix up length */
+ decoded.length = n;
+ return decoded;
+}
+
+/**
+ * Decode a base64 string in-place - wrapper for the above
+ **/
+_PUBLIC_ void base64_decode_inplace(char *s)
+{
+ DATA_BLOB decoded = base64_decode_data_blob(s);
+
+ if ( decoded.length != 0 ) {
+ memcpy(s, decoded.data, decoded.length);
+
+ /* null terminate */
+ s[decoded.length] = '\0';
+ } else {
+ *s = '\0';
+ }
+
+ data_blob_free(&decoded);
+}
+
+/**
+ * Encode a base64 string into a talloc()ed string caller to free.
+ *
+ * From SQUID: adopted from http://ftp.sunet.se/pub2/gnu/vm/base64-encode.c
+ * with adjustments
+ **/
+
+_PUBLIC_ char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
+{
+ int bits = 0;
+ int char_count = 0;
+ size_t out_cnt, len, output_len;
+ char *result;
+
+ if (!data.length || !data.data)
+ return NULL;
+
+ out_cnt = 0;
+ len = data.length;
+ output_len = data.length * 2 + 4; /* Account for closing bytes. 4 is
+ * random but should be enough for
+ * the = and \0 */
+ result = talloc_array(mem_ctx, char, output_len); /* get us plenty of space */
+ SMB_ASSERT(result != NULL);
+
+ while (len--) {
+ int c = (unsigned char) *(data.data++);
+ bits += c;
+ char_count++;
+ if (char_count == 3) {
+ result[out_cnt++] = b64[bits >> 18];
+ result[out_cnt++] = b64[(bits >> 12) & 0x3f];
+ result[out_cnt++] = b64[(bits >> 6) & 0x3f];
+ result[out_cnt++] = b64[bits & 0x3f];
+ bits = 0;
+ char_count = 0;
+ } else {
+ bits <<= 8;
+ }
+ }
+ if (char_count != 0) {
+ bits <<= 16 - (8 * char_count);
+ result[out_cnt++] = b64[bits >> 18];
+ result[out_cnt++] = b64[(bits >> 12) & 0x3f];
+ if (char_count == 1) {
+ result[out_cnt++] = '=';
+ result[out_cnt++] = '=';
+ } else {
+ result[out_cnt++] = b64[(bits >> 6) & 0x3f];
+ result[out_cnt++] = '=';
+ }
+ }
+ result[out_cnt] = '\0'; /* terminate */
+ return result;
+}
+
diff --git a/lib/util/util.h b/lib/util/util.h
index 48d6566dd0..45779912f3 100644
--- a/lib/util/util.h
+++ b/lib/util/util.h
@@ -410,6 +410,19 @@ _PUBLIC_ int strwicmp(const char *psz1, const char *psz2);
_PUBLIC_ void string_replace(char *s, char oldc, char newc);
/**
+ Base64 decode a string, place into a data blob. Caller to data_blob_free() the result.
+**/
+_PUBLIC_ DATA_BLOB base64_decode_data_blob(const char *s);
+/**
+ Base64 decode a string, inplace
+**/
+_PUBLIC_ void base64_decode_inplace(char *s);
+/**
+ Base64 encode a binary data blob into a string
+**/
+_PUBLIC_ char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data);
+
+/**
* Compare 2 strings.
*
* @note The comparison is case-insensitive.
diff --git a/lib/util/util_str.c b/lib/util/util_str.c
index 8695266655..41183ff570 100644
--- a/lib/util/util_str.c
+++ b/lib/util/util_str.c
@@ -320,5 +320,3 @@ _PUBLIC_ void string_replace(char *s, char oldc, char newc)
s++;
}
}
-
-
diff --git a/lib/util/wscript_build b/lib/util/wscript_build
index 6aaf04c96e..e39af54c0f 100755
--- a/lib/util/wscript_build
+++ b/lib/util/wscript_build
@@ -7,7 +7,7 @@ bld.SAMBA_LIBRARY('samba-util-common',
util_file.c time.c rbtree.c rfc1738.c select.c
genrand.c fsusage.c blocking.c become_daemon.c
signal.c system.c params.c util.c util_id.c util_net.c
- util_strlist.c idtree.c debug.c fault.c''',
+ util_strlist.c idtree.c debug.c fault.c base64.c''',
public_deps='talloc pthread LIBCRYPTO',
# until we get all the dependencies in this library in common
# we need to allow this library to be built with unresolved symbols