use string/string_view for base32

libi2pd/Blinding.cpp

@@ -156,7 +156,7 @@ namespace data
 		m_SigType (0) // 0 means invalid, we can't blind DSA, set it later
 	{
 		uint8_t addr[40]; // TODO: define length from b33
-		size_t l = i2p::data::Base32ToByteStream (b33.data (), b33.length (), addr, 40);
+		size_t l = i2p::data::Base32ToByteStream (b33, addr, 40);
 		if (l < 32)
 		{
 			LogPrint (eLogError, "Blinding: Malformed b33 ", b33);
@@ -198,7 +198,7 @@ namespace data
 	std::string BlindedPublicKey::ToB33 () const
 	{
 		if (m_PublicKey.size () > 32) return ""; // assume 25519
-		uint8_t addr[35]; char str[60]; // TODO: define actual length
+		uint8_t addr[35];
 		uint8_t flags = 0;
 		if (m_IsClientAuth) flags |= B33_PER_CLIENT_AUTH_FLAG;
 		addr[0] = flags; // flags
@@ -208,8 +208,7 @@ namespace data
 		uint32_t checksum = crc32 (0, addr + 3, m_PublicKey.size ());
 		// checksum is Little Endian
 		addr[0] ^= checksum; addr[1] ^= (checksum >> 8); addr[2] ^= (checksum >> 16);
-		auto l = ByteStreamToBase32 (addr, m_PublicKey.size () + 3, str, 60);
-		return std::string (str, str + l);
+		return ByteStreamToBase32 (addr, m_PublicKey.size () + 3);
 	}
 
 	void BlindedPublicKey::GetCredential (uint8_t * credential) const