1 files changed, 118 insertions, 0 deletions
diff --git a/thirdparty/misc/base64.c b/thirdparty/misc/base64.c
new file mode 100644
index 0000000000..0929ae5db5
--- /dev/null
+++ b/thirdparty/misc/base64.c
@@ -0,0 +1,118 @@
+/*
+ * File: base64.c
+ * Description: Simple BASE64 conversion methods
+ * Author: Ari Edelkind
+ * License: Public Domain
+ * Website: http://episec.com/people/edelkind/c.html
+ */
+
+#include <string.h>
+
+char b64string[] =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+long base64_encode (to, from, len)
+	char *to, *from;
+	unsigned int len;
+{
+	char *fromp = from;
+	char *top = to;
+	unsigned char cbyte;
+	unsigned char obyte;
+	char end[3];
+
+	for (; len >= 3; len -= 3) {
+		cbyte = *fromp++;
+		*top++ = b64string[(int)(cbyte >> 2)];
+		obyte = (cbyte << 4) & 0x30;		/* 0011 0000 */
+
+		cbyte = *fromp++;
+		obyte |= (cbyte >> 4);			/* 0000 1111 */
+		*top++ = b64string[(int)obyte];
+		obyte = (cbyte << 2) & 0x3C;		/* 0011 1100 */
+
+		cbyte = *fromp++;
+		obyte |= (cbyte >> 6);			/* 0000 0011 */
+		*top++ = b64string[(int)obyte];
+		*top++ = b64string[(int)(cbyte & 0x3F)];/* 0011 1111 */
+	}
+
+	if (len) {
+		end[0] = *fromp++;
+		if (--len) end[1] = *fromp++; else end[1] = 0;
+		end[2] = 0;
+
+		cbyte = end[0];
+		*top++ = b64string[(int)(cbyte >> 2)];
+		obyte = (cbyte << 4) & 0x30;		/* 0011 0000 */
+
+		cbyte = end[1];
+		obyte |= (cbyte >> 4);
+		*top++ = b64string[(int)obyte];
+		obyte = (cbyte << 2) & 0x3C;		/* 0011 1100 */
+
+		if (len) *top++ = b64string[(int)obyte];
+		else *top++ = '=';
+		*top++ = '=';
+	}
+	*top = 0;
+	return top - to;
+}
+
+/* badchar(): check if c is decent; puts either the */
+/* location of c or null into p.                  */
+#define badchar(c,p) (!(p = memchr(b64string, c, 64)))
+
+long base64_decode (to, from, len)
+	char *to, *from;
+	unsigned int len;
+{
+	char *fromp = from;
+	char *top = to;
+	char *p;
+	unsigned char cbyte;
+	unsigned char obyte;
+	int padding = 0;
+
+	for (; len >= 4; len -= 4) {
+		if ((cbyte = *fromp++) == '=') cbyte = 0;
+		else {
+			if (badchar(cbyte, p)) return -1;
+			cbyte = (p - b64string);
+		}
+		obyte = cbyte << 2;		/* 1111 1100 */
+
+		if ((cbyte = *fromp++) == '=') cbyte = 0;
+		else {
+			if (badchar(cbyte, p)) return -1;
+			cbyte = p - b64string;
+		}
+		obyte |= cbyte >> 4;		/* 0000 0011 */
+		*top++ = obyte;
+
+		obyte = cbyte << 4;		/* 1111 0000 */
+		if ((cbyte = *fromp++) == '=') { cbyte = 0; padding++; }
+		else {
+			padding = 0;
+			if (badchar (cbyte, p)) return -1;
+			cbyte = p - b64string;
+		}
+		obyte |= cbyte >> 2;		/* 0000 1111 */
+		*top++ = obyte;
+
+		obyte = cbyte << 6;		/* 1100 0000 */
+		if ((cbyte = *fromp++) == '=') { cbyte = 0; padding++; }
+		else {
+			padding = 0;
+			if (badchar (cbyte, p)) return -1;
+			cbyte = p - b64string;
+		}
+		obyte |= cbyte;			/* 0011 1111 */
+		*top++ = obyte;
+	}
+
+	*top = 0;
+	if (len) return -1;
+	return (top - to) - padding;
+}
+