Hush Full Node is now GPLv3

Any projects which want to use Hush code from now on will need to be licensed as
GPLv3 or we will send the lawyers: https://www.softwarefreedom.org/

Notably, Komodo (KMD) is licensed as GPLv2 and is no longer compatible to receive
code changes, without causing legal issues. MIT projects, such as Zcash, also cannot pull
in changes from the Hush Full Node without permission from The Hush Developers,
which may in some circumstances grant an MIT license on a case-by-case basis.

src/crypto/common.h

@@ -1,8 +1,8 @@
 // Copyright (c) 2014 The Bitcoin Core developers
 // Copyright (c) 2019-2020 The Hush developers
 // Released under the GPLv3
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #ifndef BITCOIN_CRYPTO_COMMON_H
 #define BITCOIN_CRYPTO_COMMON_H

src/crypto/ctaes/ctaes.h

@@ -1,7 +1,7 @@
  /*********************************************************************
  * Copyright (c) 2016 Pieter Wuille                                   *
  * Distributed under the MIT software license, see the accompanying   *
- * file COPYING or https://www.opensource.org/licenses/mit-license.php*
+ * file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html*
  **********************************************************************/
 
 #ifndef _CTAES_H_

src/crypto/equihash.cpp

@@ -1,7 +1,7 @@
 // Copyright (c) 2016 Jack Grigg
 // Copyright (c) 2016 The Zcash developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 // Implementation of the Equihash Proof-of-Work algorithm.
 //

src/crypto/equihash.h

@@ -1,7 +1,7 @@
 // Copyright (c) 2016 Jack Grigg
 // Copyright (c) 2016 The Zcash developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #ifndef BITCOIN_EQUIHASH_H
 #define BITCOIN_EQUIHASH_H

src/crypto/hmac_sha256.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #include "crypto/hmac_sha256.h"
 

src/crypto/hmac_sha256.h

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #ifndef BITCOIN_CRYPTO_HMAC_SHA256_H
 #define BITCOIN_CRYPTO_HMAC_SHA256_H

src/crypto/hmac_sha512.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #include "crypto/hmac_sha512.h"
 

src/crypto/hmac_sha512.h

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #ifndef BITCOIN_CRYPTO_HMAC_SHA512_H
 #define BITCOIN_CRYPTO_HMAC_SHA512_H

src/crypto/ripemd160.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #include "crypto/ripemd160.h"
 

src/crypto/ripemd160.h

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #ifndef BITCOIN_CRYPTO_RIPEMD160_H
 #define BITCOIN_CRYPTO_RIPEMD160_H

src/crypto/sha1.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #include "crypto/sha1.h"
 

src/crypto/sha1.h

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #ifndef BITCOIN_CRYPTO_SHA1_H
 #define BITCOIN_CRYPTO_SHA1_H

src/crypto/sha256.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #include "crypto/sha256.h"
 #include "crypto/common.h"

src/crypto/sha256.h

@@ -1,6 +1,6 @@
 // Copyright (c) 2014-2016 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #ifndef BITCOIN_CRYPTO_SHA256_H
 #define BITCOIN_CRYPTO_SHA256_H

src/crypto/sha256_sse4.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2017 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 //
 // This is a translation to GCC extended asm syntax from YASM code by Intel
 // (available at the bottom of this file).

src/crypto/sha512.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #include "crypto/sha512.h"
 

src/crypto/sha512.h

@@ -1,6 +1,6 @@
 // Copyright (c) 2014 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or https://www.opensource.org/licenses/mit-license.php
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 #ifndef BITCOIN_CRYPTO_SHA512_H
 #define BITCOIN_CRYPTO_SHA512_H