/
3des.go
50 lines (41 loc) · 1.09 KB
/
3des.go
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package bdcrypto
import (
"crypto/cipher"
"crypto/des"
"errors"
)
// DESCBCEncrypt3 实现3DES加密, CBC模式
func DESCBCEncrypt3(plaintext, key, iv []byte) (ciphertext []byte, err error) {
block, err := des.NewTripleDESCipher(key)
if err != nil {
return nil, err
}
defer func() {
if rerr := recover(); rerr != nil {
err = errors.New(rerr.(string))
}
}()
bs := block.BlockSize()
plaintext = PKCS5Padding(plaintext, bs)
blockMode := cipher.NewCBCEncrypter(block, iv)
ciphertext = make([]byte, len(plaintext))
blockMode.CryptBlocks(ciphertext, plaintext)
return ciphertext, nil
}
// DESCBCDecrypt3 实现3DES解密, CBC模式
func DESCBCDecrypt3(ciphertext, key, iv []byte) (plaintext []byte, err error) {
block, err := des.NewTripleDESCipher(key)
if err != nil {
return nil, err
}
defer func() {
if rerr := recover(); rerr != nil {
err = errors.New(rerr.(string))
}
}()
blockMode := cipher.NewCBCDecrypter(block, iv)
plaintext = make([]byte, len(ciphertext))
blockMode.CryptBlocks(plaintext, ciphertext)
plaintext = PKCS5UnPadding(plaintext)
return plaintext, nil
}