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101 lines
2.3 KiB
101 lines
2.3 KiB
package crypter
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import (
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"encoding/base64"
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"errors"
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"crypto/des"
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"encoding/hex"
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)
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// ECB模式加密，返回16进制结果
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func TripleECBEncryptForHex(key, plaintext string) (string, error) {
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keyBytes, err := base64.StdEncoding.DecodeString(key)
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if err != nil {
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return "", err
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}
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data := []byte(plaintext)
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ciphertext, err := TripleECBEncrypt(keyBytes, data)
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if err != nil {
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return "", err
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}
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return hex.EncodeToString(ciphertext), nil
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}
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// ECB模式解密16进制密文
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func TripleECBDecryptFromHex(key, plaintext string) (string, error) {
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keyBytes, err := base64.StdEncoding.DecodeString(key)
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if err != nil {
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return "", err
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}
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data, err := hex.DecodeString(plaintext)
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if err != nil {
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return "", err
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}
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ciphertext, err := TripleECBDecrypt(keyBytes, data)
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if err != nil {
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return "", err
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}
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return string(ciphertext), nil
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}
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// ECB模式加密，返回byte
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func TripleECBEncrypt(key, plaintext []byte) ([]byte, error) {
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// 创建Triple DES的块加密器
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block, err := des.NewTripleDESCipher(key)
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if err != nil {
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return []byte(""), err
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}
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// 创建切片来存储加密后的密文
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ciphertext := make([]byte, len(plaintext))
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// 复制明文到切片中
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copy(ciphertext, plaintext)
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// 应用PKCS#7填充
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ciphertext = PKCS5Padding(ciphertext, block.BlockSize())
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// 使用ECB模式加密填充后的数据
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for i := 0; i < len(ciphertext); i += block.BlockSize() {
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block.Encrypt(ciphertext[i:i+block.BlockSize()], ciphertext[i:i+block.BlockSize()])
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}
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return ciphertext, nil
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}
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// ECB模式解密，返回byte
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func TripleECBDecrypt(key, ciphertext []byte) ([]byte, error) {
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// 创建Triple DES的块加密器（解密时也需要这个）
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block, err := des.NewTripleDESCipher(key)
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if err != nil {
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return []byte(""), err
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}
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// 检查密文长度是否是8字节的倍数
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if len(ciphertext)%des.BlockSize != 0 {
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return []byte(""), errors.New("ciphertext is not a multiple of the block size")
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}
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// 创建一个buffer来存储解密后的明文
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plaintext := make([]byte, len(ciphertext))
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// 使用ECB模式解密
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for i := 0; i < len(ciphertext); i += block.BlockSize() {
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block.Decrypt(plaintext[i:i+block.BlockSize()], ciphertext[i:i+block.BlockSize()])
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}
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plaintext = PKCS5UnPadding(plaintext)
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// 打印解密后的明文
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return plaintext, nil
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}
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