Add I2P BOB support to libretroashare and RetroShare GUI

libretroshare/src/util/radix32.h

@@ -0,0 +1,50 @@
+#ifndef RADIX32_H
+#define RADIX32_H
+
+#include <string>
+#include <string.h>
+#include <vector>
+#include <stdint.h>
+
+class Radix32
+{
+public:
+	static std::string encode(const std::vector<uint8_t> &in) {
+		return encode(in.data(), in.size());
+	}
+
+	static std::string encode(const uint8_t *data, size_t len) {
+		std::string out = "";
+
+		size_t pos = 1;
+		uint8_t bits = 8, index;
+		uint16_t tmp = data[0]; // need min. 16 bits here
+		while (bits > 0 || pos < len)	{
+			if (bits < 5) {
+				if (pos < len) {
+					tmp <<= 8;
+					tmp |= data[pos++] & 0xFF;
+					bits += 8;
+				} else { // last byte
+					tmp <<= (5 - bits);
+					bits = 5;
+				}
+			}
+
+			bits -= 5;
+			index = (tmp >> bits) & 0x1F;
+			out.push_back(bintoasc()[index]);
+		}
+
+		// append padding
+		while(out.length() % 4 != 0)
+			out.push_back('=');
+
+		return out;
+	}
+
+private:
+	static const inline char *bintoasc() { static const char bta[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567"; return bta ; }
+};
+
+#endif // RADIX32_H