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fix: fix aes/des cbc crypto iv bug

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dudaodong
2022-07-20 11:42:52 +08:00
parent ecf325a06c
commit cece13e929
2 changed files with 33 additions and 22 deletions
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25
cryptor/des.go
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@@ -55,12 +55,16 @@ func DesEcbDecrypt(encrypted, key []byte) []byte {
// len(key) should be 8
func DesCbcEncrypt(data, key []byte) []byte {
block, _ := des.NewCipher(key)
blockSize := block.BlockSize()
data = pkcs7Padding(data, blockSize)
blockMode := cipher.NewCBCEncrypter(block, key[:blockSize])
data = pkcs7Padding(data, block.BlockSize())
encrypted := make([]byte, len(data))
blockMode.CryptBlocks(encrypted, data)
encrypted := make([]byte, des.BlockSize+len(data))
iv := encrypted[:des.BlockSize]
if _, err := io.ReadFull(rand.Reader, iv); err != nil {
panic(err)
}
mode := cipher.NewCBCEncrypter(block, iv)
mode.CryptBlocks(encrypted[des.BlockSize:], data)
return encrypted
}
@@ -69,13 +73,14 @@ func DesCbcEncrypt(data, key []byte) []byte {
// len(key) should be 8
func DesCbcDecrypt(encrypted, key []byte) []byte {
block, _ := des.NewCipher(key)
blockSize := block.BlockSize()
blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])
decrypted := make([]byte, len(encrypted))
blockMode.CryptBlocks(decrypted, encrypted)
decrypted = pkcs7UnPadding(decrypted)
iv := encrypted[:des.BlockSize]
encrypted = encrypted[des.BlockSize:]
mode := cipher.NewCBCDecrypter(block, iv)
mode.CryptBlocks(encrypted, encrypted)
decrypted := pkcs7UnPadding(encrypted)
return decrypted
}