Merge pull request cosmos#46 from tendermint/develop

Develop

CHANGELOG.md

@@ -1,5 +1,19 @@
 # Changelog
 
+## 0.4.0 (October 27, 2017)
+
+BREAKING CHANGES:
+
+- `keys`: use bcrypt plus salt
+
+FEATURES:
+
+- add support for signing via Ledger Nano
+
+IMPROVEMENTS:
+
+- linting and comments
+
 ## 0.3.0 (September 22, 2017)
 
 BREAKING CHANGES:

Makefile

@@ -2,13 +2,15 @@
 
 GOTOOLS = \
 	github.com/Masterminds/glide \
-	github.com/jteeuwen/go-bindata/go-bindata
+	github.com/jteeuwen/go-bindata/go-bindata \
+	github.com/alecthomas/gometalinter
+
 REPO:=github.com/tendermint/go-crypto
 
-all: get_vendor_deps test
+all: get_vendor_deps metalinter_test test
 
 test:
-	go test `glide novendor`
+	go test -p 1 `glide novendor`
 
 get_vendor_deps: ensure_tools
 	@rm -rf vendor/
@@ -31,3 +33,37 @@ codegen:
 	@echo "--> regenerating all interface wrappers"
 	@gen
 	@echo "Done!"
+
+metalinter: ensure_tools
+	@gometalinter --install
+	gometalinter --vendor --deadline=600s --enable-all --disable=lll ./...
+
+metalinter_test: ensure_tools
+	@gometalinter --install
+	gometalinter --vendor --deadline=600s --disable-all  \
+		--enable=deadcode \
+		--enable=gas \
+		--enable=goconst \
+		--enable=gocyclo \
+		--enable=gosimple \
+	 	--enable=ineffassign \
+	   	--enable=interfacer \
+		--enable=maligned \
+		--enable=megacheck \
+	 	--enable=misspell \
+		--enable=safesql \
+		--enable=staticcheck \
+		--enable=structcheck \
+	   	--enable=unconvert \
+		--enable=unused \
+		--enable=vetshadow \
+		--enable=vet \
+		--enable=varcheck \
+		./...
+
+		#--enable=dupl \
+		#--enable=errcheck \
+		#--enable=goimports \
+		#--enable=golint \ <== comments on anything exported
+		#--enable=gotype \
+		#--enable=unparam \

armor.go

@@ -22,7 +22,7 @@ func EncodeArmor(blockType string, headers map[string]string, data []byte) strin
 	if err != nil {
 		PanicSanity("Error encoding ascii armor: " + err.Error())
 	}
-	return string(buf.Bytes())
+	return buf.String()
 }
 
 func DecodeArmor(armorStr string) (blockType string, headers map[string]string, data []byte, err error) {

bcrypt/bcrypt.go

@@ -50,7 +50,7 @@ func (ih InvalidHashPrefixError) Error() string {
 type InvalidCostError int
 
 func (ic InvalidCostError) Error() string {
-	return fmt.Sprintf("crypto/bcrypt: cost %d is outside allowed range (%d,%d)", int(ic), int(MinCost), int(MaxCost))
+	return fmt.Sprintf("crypto/bcrypt: cost %d is outside allowed range (%d,%d)", int(ic), int(MinCost), int(MaxCost)) // nolint: unconvert
 }
 
 const (

doc.go

@@ -0,0 +1,48 @@
+/*
+go-crypto is a customized/convenience cryptography package
+for supporting Tendermint.
+
+It wraps select functionality of equivalent functions in the
+Go standard library, for easy usage with our libraries.
+
+Keys:
+
+All key generation functions return an instance of the PrivKey interface
+which implements methods
+
+    AssertIsPrivKeyInner()
+    Bytes() []byte
+    Sign(msg []byte) Signature
+    PubKey() PubKey
+    Equals(PrivKey) bool
+    Wrap() PrivKey
+
+From the above method we can:
+a) Retrieve the public key if needed
+
+    pubKey := key.PubKey()
+
+For example:
+    privKey, err := crypto.GenPrivKeyEd25519()
+    if err != nil {
+	...
+    }
+    pubKey := privKey.PubKey()
+    ...
+    // And then you can use the private and public key
+    doSomething(privKey, pubKey)
+
+
+We also provide hashing wrappers around algorithms:
+
+Sha256
+    sum := crypto.Sha256([]byte("This is Tendermint"))
+    fmt.Printf("%x\n", sum)
+
+Ripemd160
+    sum := crypto.Ripemd160([]byte("This is consensus"))
+    fmt.Printf("%x\n", sum)
+*/
+package crypto
+
+// TODO: Add more docs in here

embed_test.go

@@ -73,17 +73,17 @@ func TestEncodeDemo(t *testing.T) {
 		// Try to encode as binary
 		b, err := data.ToWire(tc.in)
 		if assert.Nil(err, "%d: %#v", i, tc.in) {
-			err := data.FromWire(b, tc.out)
-			if assert.Nil(err) {
+			err2 := data.FromWire(b, tc.out)
+			if assert.Nil(err2) {
 				assert.Equal(tc.expected, tc.out.String())
 			}
 		}
 
 		// Try to encode it as json
 		j, err := data.ToJSON(tc.in)
 		if assert.Nil(err, "%d: %#v", i, tc.in) {
-			err := data.FromJSON(j, tc.out)
-			if assert.Nil(err) {
+			err2 := data.FromJSON(j, tc.out)
+			if assert.Nil(err2) {
 				assert.Equal(tc.expected, tc.out.String())
 			}
 		}

example_test.go

@@ -0,0 +1,35 @@
+// Copyright 2017 Tendermint. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package crypto_test
+
+import (
+	"fmt"
+
+	"github.com/tendermint/go-crypto"
+)
+
+func ExampleSha256() {
+	sum := crypto.Sha256([]byte("This is Tendermint"))
+	fmt.Printf("%x\n", sum)
+	// Output:
+	// f91afb642f3d1c87c17eb01aae5cb65c242dfdbe7cf1066cc260f4ce5d33b94e
+}
+
+func ExampleRipemd160() {
+	sum := crypto.Ripemd160([]byte("This is Tendermint"))
+	fmt.Printf("%x\n", sum)
+	// Output:
+	// 051e22663e8f0fd2f2302f1210f954adff009005
+}

glide.yaml

@@ -22,14 +22,9 @@ import:
   - nacl/secretbox
   - openpgp/armor
   - ripemd160
-- package: github.com/bgentry/speakeasy
-- package: github.com/gorilla/handlers
-- package: github.com/gorilla/mux
 - package: github.com/pkg/errors
-- package: github.com/spf13/cobra
-- package: github.com/spf13/viper
-- package: gopkg.in/go-playground/validator.v9
 - package: github.com/howeyc/crc16
+- package: github.com/ethanfrey/ledger
 testImport:
 - package: github.com/mndrix/btcutil
 - package: github.com/stretchr/testify