Use public forked big package for encrypted_key_storage file until Go 1.10

helper/keysutil/encrypted_key_storage.go

@@ -7,7 +7,7 @@ import (
 	paths "path"
 	"strings"
 
-	"github.com/golang/go/src/math/big"
+	big "github.com/hashicorp/golang-math-big/big"
 
 	"github.com/hashicorp/golang-lru"
 	"github.com/hashicorp/vault/logical"

vendor/github.com/golang/go/PATENTS

@@ -1,22 +0,0 @@
-Additional IP Rights Grant (Patents)
-
-"This implementation" means the copyrightable works distributed by
-Google as part of the Go project.
-
-Google hereby grants to You a perpetual, worldwide, non-exclusive,
-no-charge, royalty-free, irrevocable (except as stated in this section)
-patent license to make, have made, use, offer to sell, sell, import,
-transfer and otherwise run, modify and propagate the contents of this
-implementation of Go, where such license applies only to those patent
-claims, both currently owned or controlled by Google and acquired in
-the future, licensable by Google that are necessarily infringed by this
-implementation of Go.  This grant does not include claims that would be
-infringed only as a consequence of further modification of this
-implementation.  If you or your agent or exclusive licensee institute or
-order or agree to the institution of patent litigation against any
-entity (including a cross-claim or counterclaim in a lawsuit) alleging
-that this implementation of Go or any code incorporated within this
-implementation of Go constitutes direct or contributory patent
-infringement, or inducement of patent infringement, then any patent
-rights granted to you under this License for this implementation of Go
-shall terminate as of the date such litigation is filed.

vendor/vendor.json

@@ -924,12 +924,6 @@
 			"revision": "23def4e6c14b4da8ac2ed8007337bc5eb5007998",
 			"revisionTime": "2016-01-25T20:49:56Z"
 		},
-		{
-			"checksumSHA1": "y1GG7DFXzx8ABfTWlVdgMVvlYU0=",
-			"path": "github.com/golang/go/src/math/big",
-			"revision": "bf86aec25972f3a100c3aa58a6abcbcc35bdea49",
-			"revisionTime": "2018-02-16T04:20:11Z"
-		},
 		{
 			"checksumSHA1": "WX1+2gktHcBmE9MGwFSGs7oqexU=",
 			"path": "github.com/golang/protobuf/proto",
@@ -1128,6 +1122,12 @@
 			"revision": "0fb14efe8c47ae851c0034ed7a448854d3d34cf3",
 			"revisionTime": "2018-02-01T23:52:37Z"
 		},
+		{
+			"checksumSHA1": "lRuxdDhw4Qt9aKXpHzdRInP+jVg=",
+			"path": "github.com/hashicorp/golang-math-big/big",
+			"revision": "561262b71329a2a771294d66accacab6b598b37b",
+			"revisionTime": "2018-03-16T14:22:57Z"
+		},
 		{
 			"checksumSHA1": "HtpYAWHvd9mq+mHkpo7z8PGzMik=",
 			"path": "github.com/hashicorp/hcl",