Add base64 algorithms from PolarSSL to libalpm

We will need these for GPG functionality (decoding the base64 encoded
signature stored in the databases).

Signed-off-by: Dan McGee <dan@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/lib/libalpm/base64.h b/lib/libalpm/base64.h
new file mode 100644
index 00000000..0ae9612c
--- /dev/null
+++ b/lib/libalpm/base64.h
@@ -0,0 +1,68 @@
+/**
+ * \file base64.h
+ *
+ *  Copyright (C) 2006-2010, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  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 2 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/>.
+ */
+
+#ifndef _BASE64_H
+#define _BASE64_H
+
+#define POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL               0x0010
+#define POLARSSL_ERR_BASE64_INVALID_CHARACTER              0x0012
+
+/**
+ * \brief          Encode a buffer into base64 format
+ *
+ * \param dst      destination buffer
+ * \param dlen     size of the buffer
+ * \param src      source buffer
+ * \param slen     amount of data to be encoded
+ *
+ * \return         0 if successful, or POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL.
+ *                 *dlen is always updated to reflect the amount
+ *                 of data that has (or would have) been written.
+ *
+ * \note           Call this function with *dlen = 0 to obtain the
+ *                 required buffer size in *dlen
+ */
+int base64_encode( unsigned char *dst, int *dlen,
+                   const unsigned char *src, int  slen );
+
+/**
+ * \brief          Decode a base64-formatted buffer
+ *
+ * \param dst      destination buffer
+ * \param dlen     size of the buffer
+ * \param src      source buffer
+ * \param slen     amount of data to be decoded
+ *
+ * \return         0 if successful, POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL, or
+ *                 POLARSSL_ERR_BASE64_INVALID_DATA if the input data is not
+ *                 correct. *dlen is always updated to reflect the amount
+ *                 of data that has (or would have) been written.
+ *
+ * \note           Call this function with *dlen = 0 to obtain the
+ *                 required buffer size in *dlen
+ */
+int base64_decode( unsigned char *dst, int *dlen,
+                   const unsigned char *src, int  slen );
+
+#endif /* base64.h */