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