40 lines
801 B
Go
40 lines
801 B
Go
package crypto
|
|
|
|
import (
|
|
"crypto/cipher"
|
|
"crypto/md5"
|
|
"encoding/hex"
|
|
|
|
"golang.org/x/crypto/blowfish"
|
|
)
|
|
|
|
var (
|
|
blowfishIV = []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07}
|
|
blowfishSecretKey = []byte("g4el58wc0zvf9na1")
|
|
)
|
|
|
|
func GetBlowfishKey(trackID string) []byte {
|
|
hash := md5.Sum([]byte(trackID))
|
|
hashHex := hex.EncodeToString(hash[:])
|
|
|
|
key := make([]byte, len(blowfishSecretKey))
|
|
copy(key, blowfishSecretKey)
|
|
for i := range len(hash) {
|
|
key[i] = key[i] ^ hashHex[i] ^ hashHex[i+16]
|
|
}
|
|
|
|
return key
|
|
}
|
|
|
|
func DecryptBlowfish(data, key []byte) ([]byte, error) {
|
|
block, err := blowfish.NewCipher(key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
decrypted := make([]byte, len(data))
|
|
cipher.NewCBCDecrypter(block, blowfishIV).CryptBlocks(decrypted, data)
|
|
|
|
return decrypted, nil
|
|
}
|