diff --git a/libi2pd/Crypto.cpp b/libi2pd/Crypto.cpp
index 4393b2cc..e36b3071 100644
--- a/libi2pd/Crypto.cpp
+++ b/libi2pd/Crypto.cpp
@@ -1126,13 +1126,13 @@ namespace crypto
 		if (encrypt)
 		{
 			// calculate Poly1305 tag and write in after encrypted data
-			Poly1305HMAC ((uint32_t *)(buf + msgLen), (uint32_t *)polyKey, polyMsg.data (), offset);
+			Poly1305HMAC ((uint64_t *)(buf + msgLen), (uint64_t *)polyKey, polyMsg.data (), offset);
 		}
 		else
 		{
-			uint32_t tag[8];
+			uint64_t tag[4];
 			// calculate Poly1305 tag
-			Poly1305HMAC (tag, (uint32_t *)polyKey, polyMsg.data (), offset);
+			Poly1305HMAC (tag, (uint64_t *)polyKey, polyMsg.data (), offset);
 			if (memcmp (tag, msg + msgLen, 16)) ret = false; // compare with provided
 		}
 #else
diff --git a/libi2pd/Poly1305.cpp b/libi2pd/Poly1305.cpp
index 9ee46640..0f953b8a 100644
--- a/libi2pd/Poly1305.cpp
+++ b/libi2pd/Poly1305.cpp
@@ -10,242 +10,12 @@ namespace i2p
 {
 namespace crypto
 {
-	namespace poly1305 
-	{
-
-		struct LongBlock
-		{
-			unsigned long data[17];
-			operator unsigned long * ()
-			{
-				return data;
-			}
-		};
-
-		struct Block
-		{
-			unsigned char data[17];
-
-			operator uint8_t * ()
-			{
-				return data;
-			}
-
-			Block & operator += (const Block & other)
-			{
-				unsigned short u;
-				unsigned int i;
-				for(u = 0, i = 0; i < 17; i++)
-				{
-					u += (unsigned short) data[i] + (unsigned short) other.data[i];
-					data[i] = (unsigned char) u & 0xff;
-					u >>= 8;
-				}
-				return *this;
-			}
-
-			Block & operator %=(const LongBlock & other)
-			{
-				unsigned long u;
-				unsigned int i;
-				u = 0;
-				for (i = 0; i < 16; i++) {
-					u += other.data[i];
-					data[i] = (unsigned char)u & 0xff;
-					u >>= 8;
-				}
-				u += other.data[16];
-				data[16] = (unsigned char)u & 0x03;
-				u >>= 2;
-				u += (u << 2);
-				for (i = 0; i < 16; i++) {
-					u += data[i];
-					data[i] = (unsigned char)u & 0xff;
-					u >>= 8;
-				}
-				data[16] += (unsigned char)u;
-				return *this;
-			}
-
-			Block & operator = (const Block & other)
-			{
-				memcpy(data, other.data, sizeof(data));
-				return *this;
-			}
-
-			Block & operator ~ ()
-			{
-				static const Block minusp = {
-					0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-					0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-					0xfc
-				};
-				Block orig;
-				unsigned char neg;
-				unsigned int i;
-				orig = *this;
-				*this += minusp;
-				neg = -(data[16] >> 7);
-				for(i = 0; i < 17; i++)
-					data[i] ^= neg & (orig.data[i] ^ data[i]);
-
-				return *this;
-			}
-
-			void PutKey(const uint8_t * key)
-			{
-				data[0] = key[0] & 0xff;
-				data[1] = key[1] & 0xff;
-				data[2] = key[2] & 0xff;
-				data[3] = key[3] & 0x0f;
-				data[4] = key[4] & 0xfc;
-				data[5] = key[5] & 0xff;
-				data[6] = key[6] & 0xff;
-				data[7] = key[7] & 0x0f;
-				data[8] = key[8] & 0xfc;
-				data[9] = key[9] & 0xff;
-				data[10] = key[10] & 0xff;
-				data[11] = key[11] & 0x0f;
-				data[12] = key[12] & 0xfc;
-				data[13] = key[13] & 0xff;
-				data[14] = key[14] & 0xff;
-				data[15] = key[15] & 0x0f;
-				data[16] = 0;
-			}
-
-			void Put(const uint8_t * d, uint8_t last=0)
-			{
-				memcpy(data, d, 17);
-				data[16] = last;
-			}
-		};
-
-		struct Buffer
-		{
-			uint8_t data[POLY1305_BLOCK_BYTES];
 
-			operator uint8_t * ()
-			{
-				return data;
-			}
-		};
-	}
-
-	struct Poly1305
+	void Poly1305HMAC(uint64_t * out, const uint64_t * key, const uint8_t * buf, std::size_t sz)
 	{
-#if (__GNUC__ == 4) && (__GNUC_MINOR__ < 8) // older than gcc 4.8
-		Poly1305(const uint8_t * key) : m_Leftover(0), m_Final(0)
-		{
-			memset (&m_H, 0, sizeof (m_H));
-#else 
-		Poly1305(const uint8_t * key) : m_Leftover(0), m_H{0}, m_Final(0)
-		{
-#endif
-			m_R.PutKey(key);
-			m_Pad.Put(key + 16);
-		}
-
-		void Update(const uint8_t * buf, size_t sz)
-		{
-			// process leftover
-			if(m_Leftover)
-			{
-				size_t want = POLY1305_BLOCK_BYTES - m_Leftover;
-				if(want > sz) want = sz;
-				memcpy(m_Buffer + m_Leftover, buf, want);
-				sz -= want;
-				buf += want;
-				m_Leftover += want;
-				if(m_Leftover < POLY1305_BLOCK_BYTES) return;
-				Blocks(m_Buffer, POLY1305_BLOCK_BYTES);
-				m_Leftover = 0;
-			}
-			// process blocks
-			if(sz >= POLY1305_BLOCK_BYTES)
-			{
-				size_t want = (sz & ~(POLY1305_BLOCK_BYTES - 1));
-				Blocks(buf, want);
-				buf += want;
-				sz -= want;
-			}
-			// leftover
-			if(sz)
-			{
-				memcpy(m_Buffer+m_Leftover, buf, sz);
-				m_Leftover += sz;
-			}
-		}
-
-		void Blocks(const uint8_t * buf, size_t sz)
-		{
-			const unsigned char hi = m_Final ^ 1;
-			while (sz >= POLY1305_BLOCK_BYTES) {
-				
-				unsigned long u;
-				
-				unsigned int i, j;
-				m_Msg.Put(buf, hi);
-				/* h += m */
-				m_H += m_Msg;
-
-				/* h *= r */
-				for (i = 0; i < 17; i++) {
-					u = 0;
-					for (j = 0; j <= i ; j++) {
-						u += (unsigned short)m_H.data[j] * m_R.data[i - j];
-					}
-					for (j = i + 1; j < 17; j++) {
-						unsigned long v = (unsigned short)m_H.data[j] * m_R.data[i + 17 - j];
-						v = ((v << 8) + (v << 6)); /* v *= (5 << 6); */
-						u += v;
-					}
-					m_HR[i] = u;
-				}
-				/* (partial) h %= p */
-				m_H %= m_HR;
-				buf += POLY1305_BLOCK_BYTES;
-				sz -= POLY1305_BLOCK_BYTES;
-			}
-		}
-
-		void Finish(uint32_t *& out)
-		{
-			// process leftovers
-			if(m_Leftover)
-			{
-				size_t idx = m_Leftover;
-				m_Buffer[idx++] = 1;
-				for(; idx < POLY1305_BLOCK_BYTES; idx++)
-					m_Buffer[idx] = 0;
-				m_Final = 1;
-				Blocks(m_Buffer, POLY1305_BLOCK_BYTES);
-			}
-
-			// freeze H
-			~m_H;
-			// add pad
-			m_H += m_Pad;
-			// copy digest
-			memcpy(out, m_H, 16);
-		}
-
-		size_t m_Leftover;
-		poly1305::Buffer m_Buffer;
-		poly1305::Block m_H;
-		poly1305::Block m_R;
-		poly1305::Block m_Pad;
-		poly1305::Block m_Msg;
-		poly1305::LongBlock m_HR;
-		uint8_t m_Final;
-		
-	};
-
-	void Poly1305HMAC(uint32_t * out, const uint32_t * key, const uint8_t * buf, std::size_t sz)
-	{
-		const uint8_t * k = (const uint8_t *) key;
-		Poly1305 p(k);
+		Poly1305 p(key);
 		p.Update(buf, sz);
 		p.Finish(out);
-  	}
+	}
 }
 }
diff --git a/libi2pd/Poly1305.h b/libi2pd/Poly1305.h
index 2c62c5aa..b2d64bb0 100644
--- a/libi2pd/Poly1305.h
+++ b/libi2pd/Poly1305.h
@@ -14,14 +14,244 @@ namespace i2p
 {
 namespace crypto
 {
-  const std::size_t POLY1305_DIGEST_BYTES = 16;
-  const std::size_t POLY1305_DIGEST_DWORDS = 4;
-  const std::size_t POLY1305_KEY_BYTES = 32;
-  const std::size_t POLY1305_KEY_DWORDS = 8;
-  const std::size_t POLY1305_BLOCK_BYTES = 16;
-
-  void Poly1305HMAC(uint32_t * out, const uint32_t * key, const uint8_t * buf, std::size_t sz);
-  
+	const std::size_t POLY1305_DIGEST_BYTES = 16;
+	const std::size_t POLY1305_DIGEST_DWORDS = 4;
+	const std::size_t POLY1305_KEY_BYTES = 32;
+	const std::size_t POLY1305_KEY_DWORDS = 8;
+	const std::size_t POLY1305_BLOCK_BYTES = 16;
+
+	namespace poly1305
+	{
+
+		struct LongBlock
+		{
+			unsigned long data[17];
+			operator unsigned long * ()
+			{
+				return data;
+			}
+		};
+
+		struct Block
+		{
+			unsigned char data[17];
+
+			void Zero()
+			{
+				memset(data, 0, sizeof(data));
+			}
+
+			operator uint8_t * ()
+			{
+				return data;
+			}
+
+			Block & operator += (const Block & other)
+			{
+				unsigned short u;
+				unsigned int i;
+				for(u = 0, i = 0; i < 17; i++)
+				{
+					u += (unsigned short) data[i] + (unsigned short) other.data[i];
+					data[i] = (unsigned char) u & 0xff;
+					u >>= 8;
+				}
+				return *this;
+			}
+
+			Block & operator %=(const LongBlock & other)
+			{
+				unsigned long u;
+				unsigned int i;
+				u = 0;
+				for (i = 0; i < 16; i++) {
+					u += other.data[i];
+					data[i] = (unsigned char)u & 0xff;
+					u >>= 8;
+				}
+				u += other.data[16];
+				data[16] = (unsigned char)u & 0x03;
+				u >>= 2;
+				u += (u << 2);
+				for (i = 0; i < 16; i++) {
+					u += data[i];
+					data[i] = (unsigned char)u & 0xff;
+					u >>= 8;
+				}
+				data[16] += (unsigned char)u;
+				return *this;
+			}
+
+			Block & operator = (const Block & other)
+			{
+				memcpy(data, other.data, sizeof(data));
+				return *this;
+			}
+
+			Block & operator ~ ()
+			{
+				static const Block minusp = {
+					0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+					0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+					0xfc
+				};
+				Block orig;
+				unsigned char neg;
+				unsigned int i;
+				orig = *this;
+				*this += minusp;
+				neg = -(data[16] >> 7);
+				for(i = 0; i < 17; i++)
+					data[i] ^= neg & (orig.data[i] ^ data[i]);
+
+				return *this;
+			}
+
+			void PutKey(const uint64_t * key_l)
+			{
+				const uint8_t * key = (const uint8_t*) key_l;
+				data[0] = key[0] & 0xff;
+				data[1] = key[1] & 0xff;
+				data[2] = key[2] & 0xff;
+				data[3] = key[3] & 0x0f;
+				data[4] = key[4] & 0xfc;
+				data[5] = key[5] & 0xff;
+				data[6] = key[6] & 0xff;
+				data[7] = key[7] & 0x0f;
+				data[8] = key[8] & 0xfc;
+				data[9] = key[9] & 0xff;
+				data[10] = key[10] & 0xff;
+				data[11] = key[11] & 0x0f;
+				data[12] = key[12] & 0xfc;
+				data[13] = key[13] & 0xff;
+				data[14] = key[14] & 0xff;
+				data[15] = key[15] & 0x0f;
+				data[16] = 0;
+			}
+
+			template<typename Int_t>
+			void Put(const Int_t * d, uint8_t last=0)
+			{
+				memcpy(data, d, 16);
+				data[16] = last;
+			}
+		};
+
+		struct Buffer
+		{
+			uint8_t data[POLY1305_BLOCK_BYTES];
+
+			operator uint8_t * ()
+			{
+				return data;
+			}
+		};
+	}
+
+	struct Poly1305
+	{
+		Poly1305(const uint64_t * key)
+		{
+			m_Leftover = 0;
+			m_H.Zero();
+			m_Final = 0;
+			m_R.PutKey(key);
+			m_Pad.Put(key + 2);
+		}
+
+		void Update(const uint8_t * buf, size_t sz)
+		{
+			// process leftover
+			if(m_Leftover)
+			{
+				size_t want = POLY1305_BLOCK_BYTES - m_Leftover;
+				if(want > sz) want = sz;
+				memcpy(m_Buffer + m_Leftover, buf, want);
+				sz -= want;
+				buf += want;
+				m_Leftover += want;
+				if(m_Leftover < POLY1305_BLOCK_BYTES) return;
+				Blocks(m_Buffer, POLY1305_BLOCK_BYTES);
+				m_Leftover = 0;
+			}
+			// process blocks
+			if(sz >= POLY1305_BLOCK_BYTES)
+			{
+				size_t want = (sz & ~(POLY1305_BLOCK_BYTES - 1));
+				Blocks(buf, want);
+				buf += want;
+				sz -= want;
+			}
+			// leftover
+			if(sz)
+			{
+				memcpy(m_Buffer+m_Leftover, buf, sz);
+				m_Leftover += sz;
+			}
+		}
+
+		void Blocks(const uint8_t * buf, size_t sz)
+		{
+			const unsigned char hi = m_Final ^ 1;
+			while (sz >= POLY1305_BLOCK_BYTES) {
+				unsigned long u;
+				unsigned int i, j;
+				m_Msg.Put(buf, hi);
+				/* h += m */
+				m_H += m_Msg;
+
+				/* h *= r */
+				for (i = 0; i < 17; i++) {
+					u = 0;
+					for (j = 0; j <= i ; j++) {
+						u += (unsigned short)m_H.data[j] * m_R.data[i - j];
+					}
+					for (j = i + 1; j < 17; j++) {
+						unsigned long v = (unsigned short)m_H.data[j] * m_R.data[i + 17 - j];
+						v = ((v << 8) + (v << 6)); /* v *= (5 << 6); */
+						u += v;
+					}
+					m_HR[i] = u;
+				}
+				/* (partial) h %= p */
+				m_H %= m_HR;
+				buf += POLY1305_BLOCK_BYTES;
+				sz -= POLY1305_BLOCK_BYTES;
+			}
+		}
+
+		void Finish(uint64_t * out)
+		{
+			// process leftovers
+			if(m_Leftover)
+			{
+				size_t idx = m_Leftover;
+				m_Buffer[idx++] = 1;
+				for(; idx < POLY1305_BLOCK_BYTES; idx++)
+					m_Buffer[idx] = 0;
+				m_Final = 1;
+				Blocks(m_Buffer, POLY1305_BLOCK_BYTES);
+			}
+
+			// freeze H
+			~m_H;
+			// add pad
+			m_H += m_Pad;
+			// copy digest
+			memcpy(out, m_H, 16);
+		}
+
+		size_t m_Leftover;
+		poly1305::Buffer m_Buffer;
+		poly1305::Block m_H;
+		poly1305::Block m_R;
+		poly1305::Block m_Pad;
+		poly1305::Block m_Msg;
+		poly1305::LongBlock m_HR;
+		uint8_t m_Final;
+	};
+	void Poly1305HMAC(uint64_t * out, const uint64_t * key, const uint8_t * buf, std::size_t sz);
+
 }
 }