Файловый менеджер

……&&*……%@#￥……%&*（（））*&……%￥#% Файловый менеджер

Файловый менеджер - Редактировать - /usr/share/doc/python3.12-cryptography/docs/development/custom-vectors/arc4/verify_arc4.go

Назад
package main import ( "bufio" "bytes" "crypto/rc4" "encoding/hex" "fmt" "os" "strconv" "strings" ) func unhexlify(s string) []byte { bytes, err := hex.DecodeString(s) if err != nil { panic(err) } return bytes } type vectorArgs struct { count string offset uint64 key string plaintext string ciphertext string } type vectorVerifier interface { validate(count string, offset uint64, key, plaintext, expectedCiphertext []byte) } type arc4Verifier struct{} func (o arc4Verifier) validate(count string, offset uint64, key, plaintext, expectedCiphertext []byte) { if offset%16 != 0 \|\| len(plaintext) != 16 \|\| len(expectedCiphertext) != 16 { panic(fmt.Errorf("Unexpected input value encountered: offset=%v; len(plaintext)=%v; len(expectedCiphertext)=%v", offset, len(plaintext), len(expectedCiphertext))) } stream, err := rc4.NewCipher(key) if err != nil { panic(err) } var currentOffset uint64 = 0 ciphertext := make([]byte, len(plaintext)) for currentOffset <= offset { stream.XORKeyStream(ciphertext, plaintext) currentOffset += uint64(len(plaintext)) } if !bytes.Equal(ciphertext, expectedCiphertext) { panic(fmt.Errorf("vector mismatch @ COUNT = %s:\n %s != %s\n", count, hex.EncodeToString(expectedCiphertext), hex.EncodeToString(ciphertext))) } } func validateVectors(verifier vectorVerifier, filename string) { vectors, err := os.Open(filename) if err != nil { panic(err) } defer vectors.Close() var segments []string var vector *vectorArgs scanner := bufio.NewScanner(vectors) for scanner.Scan() { segments = strings.Split(scanner.Text(), " = ") switch { case strings.ToUpper(segments[0]) == "COUNT": if vector != nil { verifier.validate(vector.count, vector.offset, unhexlify(vector.key), unhexlify(vector.plaintext), unhexlify(vector.ciphertext)) } vector = &vectorArgs{count: segments[1]} case strings.ToUpper(segments[0]) == "OFFSET": vector.offset, err = strconv.ParseUint(segments[1], 10, 64) if err != nil { panic(err) } case strings.ToUpper(segments[0]) == "KEY": vector.key = segments[1] case strings.ToUpper(segments[0]) == "PLAINTEXT": vector.plaintext = segments[1] case strings.ToUpper(segments[0]) == "CIPHERTEXT": vector.ciphertext = segments[1] } } if vector != nil { verifier.validate(vector.count, vector.offset, unhexlify(vector.key), unhexlify(vector.plaintext), unhexlify(vector.ciphertext)) } } func main() { validateVectors(arc4Verifier{}, "vectors/cryptography_vectors/ciphers/ARC4/arc4.txt") fmt.Println("ARC4 OK.") }