1 files changed, 78 insertions, 0 deletions
diff --git a/libreport/src/lib/encbase64.c b/libreport/src/lib/encbase64.c
new file mode 100644
index 00000000..52e02b7f
--- /dev/null
+++ b/libreport/src/lib/encbase64.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2006 Rob Landley <rob@landley.net>
+ *
+ * Licensed under GPLv2 or later.
+ */
+#include "libreport.h" /* xmalloc */
+
+/* Conversion table for base 64 */
+static const char tbl_base64[65 /*+ 2*/] = {
+	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+	'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+	'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+	'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+	'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+	'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+	'w', 'x', 'y', 'z', '0', '1', '2', '3',
+	'4', '5', '6', '7', '8', '9', '+', '/',
+	'=' /* termination character */,
+	// '\n', '\0' /* needed for uudecode.c */
+};
+
+/* Conversion table for uuencode
+const char tbl_uuencode[65] ALIGN1 = {
+	'`', '!', '"', '#', '$', '%', '&', '\'',
+	'(', ')', '*', '+', ',', '-', '.', '/',
+	'0', '1', '2', '3', '4', '5', '6', '7',
+	'8', '9', ':', ';', '<', '=', '>', '?',
+	'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
+	'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
+	'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
+	'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
+	'`'
+};
+*/
+
+/*
+ * Encode bytes at S of length LENGTH.
+ * Result will be 0-terminated, and must point to a writable
+ * buffer of at least 1+BASE64_LENGTH(length) bytes,
+ * where BASE64_LENGTH(len) = 4 * ((LENGTH + 2) / 3)
+ */
+static void encode_64bit(char *p, const void *src, int length, const char *tbl)
+{
+	const unsigned char *s = (const unsigned char *)src;
+
+	/* Transform the 3x8 bits to 4x6 bits */
+	while (length > 0) {
+		unsigned s1, s2;
+
+		/* Are s[1], s[2] valid or should be assumed 0? */
+		s1 = s2 = 0;
+		length -= 3; /* can be >=0, -1, -2 */
+		if (length >= -1) {
+			s1 = s[1];
+			if (length >= 0)
+				s2 = s[2];
+		}
+		*p++ = tbl[s[0] >> 2];
+		*p++ = tbl[((s[0] & 3) << 4) + (s1 >> 4)];
+		*p++ = tbl[((s1 & 0xf) << 2) + (s2 >> 6)];
+		*p++ = tbl[s2 & 0x3f];
+		s += 3;
+	}
+	/* Zero-terminate */
+	*p = '\0';
+	/* If length is -2 or -1, pad last char or two */
+	while (length) {
+		*--p = tbl[64];
+		length++;
+	}
+}
+
+char *encode_base64(const void *src, int length)
+{
+	char *dst = (char *)xmalloc(4 * ((length + 2) / 3) + 1);
+	encode_64bit(dst, src, length, tbl_base64);
+	return dst;
+}