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app/interface/main/report-click/service/crypto/cipher/BUILD

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+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_test",
+    "go_library",
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["ecb_test.go"],
+    embed = [":go_default_library"],
+    rundir = ".",
+    tags = ["automanaged"],
+    deps = [
+        "//app/interface/main/report-click/service/crypto/padding:go_default_library",
+        "//vendor/github.com/smartystreets/goconvey/convey:go_default_library",
+    ],
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = ["ecb.go"],
+    importpath = "go-common/app/interface/main/report-click/service/crypto/cipher",
+    tags = ["automanaged"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

app/interface/main/report-click/service/crypto/cipher/ecb.go

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+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Electronic Code Book (ECB) mode.
+
+// ECB provides confidentiality by assigning a fixed ciphertext block to each
+// plaintext block.
+
+// See NIST SP 800-38A, pp 08-09
+
+package cipher
+
+import (
+	"crypto/cipher"
+)
+
+type ecb struct {
+	b         cipher.Block
+	blockSize int
+}
+
+func newECB(b cipher.Block) *ecb {
+	return &ecb{
+		b:         b,
+		blockSize: b.BlockSize(),
+	}
+}
+
+type ecbEncrypter ecb
+
+// NewECBEncrypter returns a BlockMode which encrypts in electronic code book
+// mode, using the given Block.
+func NewECBEncrypter(b cipher.Block) cipher.BlockMode {
+	return (*ecbEncrypter)(newECB(b))
+}
+
+func (x *ecbEncrypter) BlockSize() int { return x.blockSize }
+
+func (x *ecbEncrypter) CryptBlocks(dst, src []byte) {
+	if len(src)%x.blockSize != 0 {
+		panic("crypto/cipher: input not full blocks")
+	}
+	if len(dst) < len(src) {
+		panic("crypto/cipher: output smaller than input")
+	}
+	for len(src) > 0 {
+		x.b.Encrypt(dst, src[:x.blockSize])
+		src = src[x.blockSize:]
+		dst = dst[x.blockSize:]
+	}
+}
+
+type ecbDecrypter ecb
+
+// NewECBDecrypter returns a BlockMode which decrypts in electronic code book
+// mode, using the given Block.
+func NewECBDecrypter(b cipher.Block) cipher.BlockMode {
+	return (*ecbDecrypter)(newECB(b))
+}
+
+func (x *ecbDecrypter) BlockSize() int { return x.blockSize }
+
+func (x *ecbDecrypter) CryptBlocks(dst, src []byte) {
+	if len(src)%x.blockSize != 0 {
+		panic("crypto/cipher: input not full blocks")
+	}
+	if len(dst) < len(src) {
+		panic("crypto/cipher: output smaller than input")
+	}
+	for len(src) > 0 {
+		x.b.Decrypt(dst, src[:x.blockSize])
+		src = src[x.blockSize:]
+		dst = dst[x.blockSize:]
+	}
+}

app/interface/main/report-click/service/crypto/cipher/ecb_test.go

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+package cipher
+
+import (
+	iaes "crypto/aes"
+	"testing"
+
+	"go-common/app/interface/main/report-click/service/crypto/padding"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestECB(t *testing.T) {
+	var (
+		aesKey = "903ef9925be1300f843b41df2ca55410"
+		bs     = []byte("this is  test massage ")
+	)
+	Convey("cipher test ", t, func() {
+		var p = padding.PKCS5
+		bs = p.Padding(bs, iaes.BlockSize)
+		b, _ := iaes.NewCipher([]byte(aesKey))
+		ecbe := NewECBEncrypter(b)
+		encryptText := make([]byte, len(bs))
+		ecbe.CryptBlocks(encryptText, bs)
+		ecbd := NewECBDecrypter(b)
+		decryptText := make([]byte, len(bs))
+		ecbd.CryptBlocks(decryptText, bs)
+		p.Unpadding(bs, iaes.BlockSize)
+	})
+}