35 lines
615 B
Go
35 lines
615 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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"fmt"
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"golang.org/x/crypto/blowfish"
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)
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func GetKey(secretKey, songID string) []byte {
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hash := md5.Sum([]byte(songID))
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hashHex := fmt.Sprintf("%x", hash)
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key := []byte(secretKey)
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for i := 0; i < len(hash); i++ {
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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 Decrypt(data, key, iv []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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mode := cipher.NewCBCDecrypter(block, iv)
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decrypted := make([]byte, len(data))
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mode.CryptBlocks(decrypted, data)
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return decrypted, nil
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}
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