From 7f8df9e1ba8fa3b30bfc047f66e3f8fbf63b3317 Mon Sep 17 00:00:00 2001
From: Wilfried Goesgens <dothebart@citadel.org>
Date: Thu, 2 Jan 2014 20:18:09 +0100
Subject: [PATCH] STRBUF: add wrapper to do source -> target buffer base 64
 decoding

---
 libcitadel/lib/libcitadel.h |  1 +
 libcitadel/lib/stringbuf.c  | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/libcitadel/lib/libcitadel.h b/libcitadel/lib/libcitadel.h
index bd7c8da9c..a1aacb5fb 100644
--- a/libcitadel/lib/libcitadel.h
+++ b/libcitadel/lib/libcitadel.h
@@ -339,6 +339,7 @@ void StrBuf_RFC822_2_Utf8(StrBuf *Target,
 void StrBuf_RFC822_to_Utf8(StrBuf *Target, const StrBuf *DecodeMe, const StrBuf* DefaultCharset, StrBuf *FoundCharset);
 
 int StrBufDecodeBase64(StrBuf *Buf);
+int StrBufDecodeBase64To(const StrBuf *BufIn, StrBuf *BufOut);
 int StrBufDecodeHex(StrBuf *Buf);
 StrBuf *StrBufRFC2047encodeMessage(const StrBuf *EncodeMe);
 int StrBufRFC2047encode(StrBuf **target, const StrBuf *source);
diff --git a/libcitadel/lib/stringbuf.c b/libcitadel/lib/stringbuf.c
index 6bcbaf1fa..547037751 100644
--- a/libcitadel/lib/stringbuf.c
+++ b/libcitadel/lib/stringbuf.c
@@ -2823,6 +2823,26 @@ int StrBufDecodeBase64(StrBuf *Buf)
 	return siz;
 }
 
+/**
+ * @ingroup StrBuf_DeEnCoder
+ * @brief decode a buffer from base 64 encoding; expects targetbuffer
+ * @param BufIn Buffor to transform
+ * @param BufOut Buffer to put result into
+ */
+int StrBufDecodeBase64To(const StrBuf *BufIn, StrBuf *BufOut)
+{
+	if ((BufIn == NULL) || (BufOut == NULL))
+		return -1;
+
+	if (BufOut->BufSize < BufIn->BufUsed)
+		IncreaseBuf(BufOut, BufIn->BufUsed, 0);
+
+	BufOut->BufUsed = CtdlDecodeBase64(BufOut->buf,
+					   BufIn->buf,
+					   BufIn->BufUsed);
+	return BufOut->BufUsed;
+}
+
 /**
  * @ingroup StrBuf_DeEnCoder
  * @brief decode a buffer from base 64 encoding; destroys original
-- 
2.30.2