146 lines
2.8 KiB
Go
146 lines
2.8 KiB
Go
package goutil
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import (
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"bytes"
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"compress/gzip"
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"encoding/base64"
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"encoding/json"
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"encoding/xml"
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"errors"
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"io"
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"unicode"
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"github.com/speps/go-hashids"
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)
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// EncodeJSON encode anything to json string
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func EncodeJSON(v interface{}) string {
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b, _ := json.Marshal(v)
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return string(b)
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}
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// EncodeJSON encode anything to json string
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func EncodeJSONIndent(v interface{}) string {
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b, _ := json.MarshalIndent(v, " ", " ")
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return string(b)
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}
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// EncodeJSON encode anything to json string
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func EncodeXML(v interface{}) string {
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b, _ := xml.Marshal(v)
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return string(b)
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}
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// EncodeJSON encode anything to json string
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func EncodeXMLIndent(v interface{}) string {
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b, _ := xml.MarshalIndent(v, " ", " ")
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return string(b)
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}
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func HasChinese(str string) bool {
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for _, r := range str {
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if unicode.Is(unicode.Han, r) {
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return true
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}
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}
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return false
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}
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func EncryptID(data int64, salt string) string {
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hd := hashids.NewData()
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hd.Salt = salt
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h, _ := hashids.NewWithData(hd)
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e, _ := h.Encode([]int{int(data)})
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return e
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}
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func DecryptID(data, salt string) int64 {
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hd := hashids.NewData()
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hd.Salt = salt
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h, _ := hashids.NewWithData(hd)
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e, _ := h.DecodeWithError(data)
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return int64(e[0])
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}
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// 先压缩再加密（适合长文本）
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func Encrypt(plaintext string, key string) (string, error) {
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// 1. 压缩
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var buf bytes.Buffer
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gz := gzip.NewWriter(&buf)
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if _, err := gz.Write([]byte(plaintext)); err != nil {
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return "", err
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}
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if err := gz.Close(); err != nil {
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return "", err
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}
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compressed := buf.Bytes()
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// 2. 加密（使用AES-GCM）
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block, err := aes.NewCipher([]byte(Md5(key)))
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if err != nil {
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return "", err
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}
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gcm, err := cipher.NewGCM(block)
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if err != nil {
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return "", err
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}
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nonce := make([]byte, gcm.NonceSize())
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if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
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return "", err
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}
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ciphertext := gcm.Seal(nonce, nonce, compressed, nil)
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// 使用RawURLEncoding
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return base64.RawURLEncoding.EncodeToString(ciphertext), nil
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}
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func Decrypt(encoded string, key string) (string, error) {
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data, err := base64.RawURLEncoding.DecodeString(encoded)
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if err != nil {
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return "", err
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}
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block, err := aes.NewCipher([]byte(Md5(key)))
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if err != nil {
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return "", err
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}
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gcm, err := cipher.NewGCM(block)
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if err != nil {
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return "", err
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}
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nonceSize := gcm.NonceSize()
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if len(data) < nonceSize {
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return "", errors.New("数据太短")
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}
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nonce := data[:nonceSize]
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ciphertext := data[nonceSize:]
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compressed, err := gcm.Open(nil, nonce, ciphertext, nil)
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if err != nil {
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return "", err
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}
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// 解压缩
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reader, err := gzip.NewReader(bytes.NewReader(compressed))
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if err != nil {
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return "", err
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}
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defer reader.Close()
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result, err := io.ReadAll(reader)
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if err != nil {
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return "", err
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}
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return string(result), nil
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}
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