Copy secp256k1 code from go-ethereum to avoid GPL vendoring issues in (…

…#3371) downstream Signed-off-by: Silas Davis <silas@monax.io>
tendermint · Mar 6, 2019 · 858875f · 858875f
1 parent 1eaa42c
commit 858875f
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diff --git a/Gopkg.lock b/Gopkg.lock
diff --git a/Gopkg.toml b/Gopkg.toml
@@ -75,18 +75,6 @@
   name = "github.com/prometheus/client_golang"
   version = "^0.9.1"
 
-# we use the secp256k1 implementation:
-[[constraint]]
-  name = "github.com/ethereum/go-ethereum"
-  version = "^v1.8.21"
-
-   # Prevent dep from pruning build scripts and codegen templates
-   # note: this leaves the whole go-ethereum package in vendor
-   # can be removed when https://github.com/golang/dep/issues/1847 is resolved
-   [[prune.project]]
-     name = "github.com/ethereum/go-ethereum"
-     unused-packages = false
-
 ###################################
 ## Some repos dont have releases.
 ## Pin to revision

diff --git a/crypto/secp256k1/internal/secp256k1/.gitignore b/crypto/secp256k1/internal/secp256k1/.gitignore
@@ -0,0 +1,24 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+
+*~
diff --git a/crypto/secp256k1/internal/secp256k1/LICENSE b/crypto/secp256k1/internal/secp256k1/LICENSE
@@ -0,0 +1,31 @@
+Copyright (c) 2010 The Go Authors. All rights reserved.
+Copyright (c) 2011 ThePiachu. All rights reserved.
+Copyright (c) 2015 Jeffrey Wilcke. All rights reserved.
+Copyright (c) 2015 Felix Lange. All rights reserved.
+Copyright (c) 2015 Gustav Simonsson. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of the copyright holder. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/crypto/secp256k1/internal/secp256k1/README.md b/crypto/secp256k1/internal/secp256k1/README.md
@@ -0,0 +1,3 @@
+This package is copied from https://github.com/ethereum/go-ethereum/tree/729bf365b5f17325be9107b63b233da54100eec6/crypto/secp256k1
+
+Unlike the rest of go-ethereum it is MIT licensed so compatible with our Apache2.0 license. We opt to copy in here rather than depend on go-ethereum to avoid issues with vendoring of the GPL parts of that repository by downstream.