131 lines
3.4 KiB
Go
131 lines
3.4 KiB
Go
package util
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import (
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"bytes"
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"crypto"
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"crypto/aes"
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"crypto/cipher"
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"crypto/hmac"
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"crypto/md5"
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"crypto/sha1"
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"crypto/sha256"
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"encoding/base64"
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"encoding/hex"
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"fmt"
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)
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// Hash 散列函数 返回空值则为错误
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func Hash(ht crypto.Hash, b []byte) []byte {
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switch ht {
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case crypto.MD5:
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h := md5.New()
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h.Write(b)
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return h.Sum(nil)
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case crypto.SHA1:
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case crypto.SHA256:
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}
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return nil
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}
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// HashHex can hash and encode to string
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func HashHex(ht crypto.Hash, b []byte) string {
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return hex.EncodeToString(Hash(ht, b))
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}
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// MD5Hash md5
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func MD5Hash(b []byte) []byte {
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h := md5.New()
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h.Write(b)
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return h.Sum(nil)
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}
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// MD5HexHash md5 and encode to string
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func MD5HexHash(b []byte) string {
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h := md5.New()
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h.Write(b)
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return hex.EncodeToString(h.Sum(nil))
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}
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// SHA256HexHash sha256 and encode to string
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func SHA256HexHash(b []byte) string {
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h := sha256.New()
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h.Write(b)
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return hex.EncodeToString(h.Sum(nil))
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}
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// SHA1HexHash sha1 and encode to string
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func SHA1HexHash(b []byte) string {
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h := sha1.New()
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h.Write(b)
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return hex.EncodeToString(h.Sum(nil))
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}
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// HMACSHA1Hash hmac-sha1
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func HMACSHA1Hash(src, key []byte) []byte {
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h := hmac.New(sha1.New, key)
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h.Write(src)
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return h.Sum(nil)
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}
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// HMACSHA1HexHash hmac-sha1 and encode to string
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func HMACSHA1HexHash(src, key []byte) string {
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h := hmac.New(sha1.New, key)
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h.Write(src)
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return hex.EncodeToString(h.Sum(nil))
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}
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func HmacSha256(data string, secret string) string {
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h := hmac.New(sha256.New, Str2bytes(secret))
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h.Write(Str2bytes(data))
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return hex.EncodeToString(h.Sum(nil))
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}
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func PwdEncode(pwd string, key string) string {
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strbytes := Str2bytes(fmt.Sprintf("%s:%s", pwd, key))
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encoded := base64.StdEncoding.EncodeToString(strbytes)
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return encoded
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}
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func PwdDecode(pwd string, key string) (string, error) {
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decoded, err := base64.StdEncoding.DecodeString(fmt.Sprintf("%s:%s", pwd, key))
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if err != nil {
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return "", nil
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}
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return string(decoded), nil
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}
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// =================== CBC ======================
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func AesEncryptCBC(origData []byte, key []byte) (encrypted []byte) {
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// 分组秘钥
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// NewCipher该函数限制了输入k的长度必须为16, 24或者32
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block, _ := aes.NewCipher(key)
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blockSize := block.BlockSize() // 获取秘钥块的长度
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origData = pkcs5Padding(origData, blockSize) // 补全码
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blockMode := cipher.NewCBCEncrypter(block, key[:blockSize]) // 加密模式
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encrypted = make([]byte, len(origData)) // 创建数组
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blockMode.CryptBlocks(encrypted, origData) // 加密
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return encrypted
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}
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func AesDecryptCBC(encrypted []byte, key []byte) (decrypted []byte) {
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block, _ := aes.NewCipher(key) // 分组秘钥
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blockSize := block.BlockSize() // 获取秘钥块的长度
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blockMode := cipher.NewCBCDecrypter(block, key[:blockSize]) // 加密模式
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decrypted = make([]byte, len(encrypted)) // 创建数组
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blockMode.CryptBlocks(decrypted, encrypted) // 解密
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decrypted = pkcs5UnPadding(decrypted) // 去除补全码
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return decrypted
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}
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func pkcs5Padding(ciphertext []byte, blockSize int) []byte {
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padding := blockSize - len(ciphertext)%blockSize
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padtext := bytes.Repeat([]byte{byte(padding)}, padding)
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return append(ciphertext, padtext...)
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}
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func pkcs5UnPadding(origData []byte) []byte {
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length := len(origData)
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unpadding := int(origData[length-1])
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return origData[:(length - unpadding)]
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}
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