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fix(des):修复DES加密时出现的密文字节数组长度不足的情况。

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This commit is contained in:
徐涛 2023-07-15 11:56:27 +08:00
parent 5e284f320d
commit 185f1f3195
2 changed files with 4 additions and 1 deletions
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2
encryption/des/des.go
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@ -41,8 +41,8 @@ func Encrypt(data []byte, key []byte, padding encryption.PaddingMode, keyGenerat
} }
iv := keyBytes[:] iv := keyBytes[:]
cipherText := make([]byte, len(data))
plainText := encryption.Padding(data, block.BlockSize(), padding) plainText := encryption.Padding(data, block.BlockSize(), padding)
cipherText := make([]byte, len(plainText))
mode := cipher.NewCBCEncrypter(block, iv) mode := cipher.NewCBCEncrypter(block, iv)
mode.CryptBlocks(cipherText, plainText) mode.CryptBlocks(cipherText, plainText)

3
encryption/padding.go
View File

@ -37,6 +37,9 @@ func Unpadding(data []byte, padding ...PaddingMode) []byte {
case PKCS7Padding: case PKCS7Padding:
length := len(data) length := len(data)
unpadding := int(data[length-1]) unpadding := int(data[length-1])
if length-unpadding < 0 {
return make([]byte, 0)
}
return data[:(length - unpadding)] return data[:(length - unpadding)]
case NoPadding: case NoPadding:
return data return data