1 files changed, 90 insertions, 0 deletions
diff --git a/lib/libfetch/base64.c b/lib/libfetch/base64.c
new file mode 100644
index 0000000..fcb628c
--- /dev/null
+++ b/lib/libfetch/base64.c
@@ -0,0 +1,90 @@
+/*-
+ * Copyright 1997 Massachusetts Institute of Technology
+ *
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose and without fee is hereby
+ * granted, provided that both the above copyright notice and this
+ * permission notice appear in all copies, that both the above
+ * copyright notice and this permission notice appear in all
+ * supporting documentation, and that the name of M.I.T. not be used
+ * in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.  M.I.T. makes
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied
+ * warranty.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
+ * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+ * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$Id: util.c,v 1.6 1998/02/20 05:08:53 jb Exp $
+ */
+
+#include <stdio.h>
+
+/*
+ * Not much left of the original MIT code, but it's still derived from it
+ * so I'll keep their copyright. This is taken from util.c in MIT fetch.
+ *
+ *					-- DES 1998/05/22
+ */
+
+/*
+ * Implement the `base64' encoding as described in RFC 1521.
+ */
+static const char base64[] = 
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+int
+fprint64(FILE *f, const unsigned char *buf)
+{
+    int len = 0, l = 0;
+    unsigned int tmp;
+
+    while (buf[len])
+	len++;
+	   
+    while (len >= 3) {
+	tmp = buf[0] << 16 | buf[1] << 8 | buf[2];
+	fprintf(f, "%c%c%c%c",
+		base64[(tmp >> 18) & 077],
+		base64[(tmp >> 12) & 077],
+		base64[(tmp >> 6) & 077],
+		base64[tmp & 077]);
+	len -= 3;
+	buf += 3;
+	l += 4;
+    }
+
+    /* RFC 1521 enumerates these three possibilities... */
+    switch(len) {
+    case 2:
+	tmp = buf[0] << 16 | buf[1] << 8;
+	fprintf(f, "%c%c%c=",
+		base64[(tmp >> 18) & 077],
+		base64[(tmp >> 12) & 077],
+		base64[(tmp >> 6) & 077]);
+	l += 4;
+	break;
+    case 1:
+	tmp = buf[0] << 16;
+	fprintf(f, "%c%c==",
+		base64[(tmp >> 18) & 077],
+		base64[(tmp >> 12) & 077]);
+	l += 4;
+	break;
+    case 0:
+	break;
+    }
+
+    return l;
+}