Пример #1
0
// ParsePEMPrivateKey returns a data.PrivateKey from a PEM encoded private key. It
// only supports RSA (PKCS#1) and attempts to decrypt using the passphrase, if encrypted.
func ParsePEMPrivateKey(pemBytes []byte, passphrase string) (*data.PrivateKey, error) {
	block, _ := pem.Decode(pemBytes)
	if block == nil {
		return nil, errors.New("no valid private key found")
	}

	switch block.Type {
	case "RSA PRIVATE KEY":
		var privKeyBytes []byte
		var err error

		if x509.IsEncryptedPEMBlock(block) {
			privKeyBytes, err = x509.DecryptPEMBlock(block, []byte(passphrase))
			if err != nil {
				return nil, errors.New("could not decrypt private key")
			}
		} else {
			privKeyBytes = block.Bytes
		}

		rsaPrivKey, err := x509.ParsePKCS1PrivateKey(privKeyBytes)
		if err != nil {
			return nil, fmt.Errorf("could not parse DER encoded key: %v", err)
		}

		tufRSAPrivateKey, err := RSAToPrivateKey(rsaPrivKey, data.RSAKey)
		if err != nil {
			return nil, fmt.Errorf("could not convert rsa.PrivateKey to data.PrivateKey: %v", err)
		}

		return tufRSAPrivateKey, nil
	case "EC PRIVATE KEY":
		var privKeyBytes []byte
		var err error

		if x509.IsEncryptedPEMBlock(block) {
			privKeyBytes, err = x509.DecryptPEMBlock(block, []byte(passphrase))
			if err != nil {
				return nil, errors.New("could not decrypt private key")
			}
		} else {
			privKeyBytes = block.Bytes
		}

		ecdsaPrivKey, err := x509.ParseECPrivateKey(privKeyBytes)
		if err != nil {
			return nil, fmt.Errorf("could not parse DER encoded private key: %v", err)
		}

		tufECDSAPrivateKey, err := ECDSAToPrivateKey(ecdsaPrivKey, data.ECDSAKey)
		if err != nil {
			return nil, fmt.Errorf("could not convert ecdsa.PrivateKey to data.PrivateKey: %v", err)
		}

		return tufECDSAPrivateKey, nil

	default:
		return nil, fmt.Errorf("unsupported key type %q", block.Type)
	}
}
Пример #2
0
func FuzzPEM(data []byte) int {
	var b pem.Block
	err := gob.NewDecoder(bytes.NewReader(data)).Decode(&b)
	if err != nil {
		return 0
	}
	b1, err := x509.DecryptPEMBlock(&b, []byte("pass"))
	if err != nil {
		return 0
	}
	b2, err := x509.EncryptPEMBlock(zeroReader(0), "msg", b1, []byte("pass1"), x509.PEMCipherDES)
	if err != nil {
		panic(err)
	}
	_, err = x509.DecryptPEMBlock(b2, []byte("pass"))
	if err == nil {
		panic("decoded with a wrong pass")
	}
	b3, err := x509.DecryptPEMBlock(b2, []byte("pass1"))
	if err != nil {
		panic(err)
	}
	if !bytes.Equal(b1, b3) {
		panic("data changed")
	}
	return 1
}
Пример #3
0
func checkKey(jobs <-chan string, wg *sync.WaitGroup, block *pem.Block) {
	// https://github.com/golang/go/issues/10171
	// golang's fix? expand the documentation ...
	defer wg.Done()
	for passwordStr := range jobs {
		password := []byte(passwordStr)
		key, err := x509.DecryptPEMBlock(block, password)
		if err == nil {
			// we now have a candidate, is it random noise or is can be parsed?
			// for some reason ParseRawPrivateKey fails so its brute force time
			// https://github.com/golang/go/issues/8581 - ed25519 are not currently supported by Golang
			_, err := ssh.ParseDSAPrivateKey(key)
			if err == nil {
				printNDie(password)
			}
			// not DSA? maybe RSA
			_, err = x509.ParsePKCS1PrivateKey(key)
			if err == nil {
				printNDie(password)
			}
			// ECDSA?
			_, err = x509.ParseECPrivateKey(key)
			if err == nil {
				printNDie(password)
			}
		}
	}
}
Пример #4
0
// SSHConfigPubKeyFile is a convience function that takes a username, private key
// and passphrase and returns a new ssh.ClientConfig setup to pass credentials
// to DialSSH
func SSHConfigPubKeyFile(user string, file string, passphrase string) (*ssh.ClientConfig, error) {
	buf, err := ioutil.ReadFile(file)
	if err != nil {
		return nil, err
	}
	block, rest := pem.Decode(buf)
	if len(rest) > 0 {
		return nil, fmt.Errorf("pem: unable to decode file %s", file)
	}

	if x509.IsEncryptedPEMBlock(block) {
		b := block.Bytes
		b, err = x509.DecryptPEMBlock(block, []byte(passphrase))
		if err != nil {
			return nil, err
		}
		buf = pem.EncodeToMemory(&pem.Block{
			Type:  block.Type,
			Bytes: b,
		})
	}

	key, err := ssh.ParsePrivateKey(buf)
	if err != nil {
		return nil, err
	}
	return &ssh.ClientConfig{
		User: user,
		Auth: []ssh.AuthMethod{
			ssh.PublicKeys(key),
		},
	}, nil

}
Пример #5
0
func LoadCertKeyFromEncPkg(encpkg []byte, passwd string) (*CertKey, error) {
	blk, _ := pem.Decode(encpkg)
	if blk == nil {
		return nil, errors.New("Invalid PEM data")
	}
	if blk.Type != pkgTypeStr {
		return nil, errors.New("PEM type is not " + pkgTypeStr)
	}
	decrypted_pem, err := x509.DecryptPEMBlock(blk, []byte(passwd))
	if err != nil {
		return nil, err
	}
	key_pem, rest := pem.Decode(decrypted_pem)
	if blk == nil {
		return nil, errors.New("decrypted content is not PEM")
	}
	cert_pem, _ := pem.Decode(rest)
	if blk == nil {
		return nil, errors.New("Can't find the cert PEM")
	}
	if _, ok := supportedKeyTypes[key_pem.Type]; !ok {
		return nil, errors.New("Unsupported Key types")
	}
	if cert_pem.Type != "CERTIFICATE" {
		return nil, errors.New("Can't find certificate in decrypted PEM data")
	}
	var ck CertKey
	switch key_pem.Type {
	case "RSA PRIVATE KEY":
		rsack := new(RSACertKey)
		priv_key, err := x509.ParsePKCS1PrivateKey(key_pem.Bytes)
		if err != nil {
			return nil, err
		}
		rsack.key = priv_key
		cert, err := x509.ParseCertificates(cert_pem.Bytes)
		if err != nil {
			return nil, err
		}
		rsack.cert = *cert[0]
		ck = rsack
		return &ck, nil
	case "EC PRIVATE KEY":
		ecck := new(ECCertKey)
		priv_key, err := x509.ParseECPrivateKey(key_pem.Bytes)
		if err != nil {
			return nil, err
		}
		ecck.key = priv_key
		cert, err := x509.ParseCertificates(cert_pem.Bytes)
		if err != nil {
			return nil, err
		}
		ecck.cert = *cert[0]
		ck = ecck
		return &ck, nil
	}
	return nil, errors.New("Unussal error, you shouldn't see this")

}
Пример #6
0
func readKeyOrGenerate(path, pass string) (*rsa.PrivateKey, error) {
	file, err := ioutil.ReadFile(path)
	var key *rsa.PrivateKey
	if err != nil {
		log.Printf("Generating new key %s...", path)
		key, err = rsa.GenerateKey(rand.Reader, rsaBitLength)
		if err != nil {
			return nil, err
		}
		raw := x509.MarshalPKCS1PrivateKey(key)
		block, err := x509.EncryptPEMBlock(rand.Reader, blockType, raw, []byte(pass), cipherType)
		if err != nil {
			return nil, err
		}
		encoded := pem.EncodeToMemory(block)
		ioutil.WriteFile(path, encoded, 0400)
	} else {
		log.Printf("Loading key %s...", path)
		block, _ := pem.Decode(file)
		if block == nil {
			return nil, fmt.Errorf("%s doesn't contain a PEM key", path)
		}
		raw, err := x509.DecryptPEMBlock(block, []byte(pass))
		if err != nil {
			return nil, err
		}
		key, err = x509.ParsePKCS1PrivateKey(raw)
		if err != nil {
			return nil, err
		}
	}
	return key, nil
}
Пример #7
0
func decryptPEM(pemblock *pem.Block, filename string) ([]byte, error) {
	var err error
	if _, err = fmt.Fprintf(os.Stderr, "Enter passphrase for %s: ", filename); err != nil {
		return []byte(""), err
	}

	// we already emit the prompt to stderr; GetPass only emits to stdout
	var passwd string
	passwd, err = gopass.GetPass("")
	fmt.Fprintln(os.Stderr, "")
	if err != nil {
		return []byte(""), err
	}

	var decryptedBytes []byte
	if decryptedBytes, err = x509.DecryptPEMBlock(pemblock, []byte(passwd)); err != nil {
		return []byte(""), err
	}

	pemBytes := pem.Block{
		Type:  "RSA PRIVATE KEY",
		Bytes: decryptedBytes,
	}
	decryptedPEM := pem.EncodeToMemory(&pemBytes)
	return decryptedPEM, nil
}
Пример #8
0
// readKey returns the decrypted key pem bytes, and enforces the KEK if applicable
// (writes it back with the correct encryption if it is not correctly encrypted)
func (k *KeyReadWriter) readKey() (*pem.Block, error) {
	keyBlock, err := k.readKeyblock()
	if err != nil {
		return nil, err
	}

	if !x509.IsEncryptedPEMBlock(keyBlock) {
		return keyBlock, nil
	}

	// If it's encrypted, we can't read without a passphrase (we're assuming
	// empty passphrases iare invalid)
	if k.kekData.KEK == nil {
		return nil, ErrInvalidKEK{Wrapped: x509.IncorrectPasswordError}
	}

	derBytes, err := x509.DecryptPEMBlock(keyBlock, k.kekData.KEK)
	if err != nil {
		return nil, ErrInvalidKEK{Wrapped: err}
	}
	// remove encryption PEM headers
	headers := make(map[string]string)
	mergePEMHeaders(headers, keyBlock.Headers)

	return &pem.Block{
		Type:    keyBlock.Type, // the key type doesn't change
		Bytes:   derBytes,
		Headers: headers,
	}, nil
}
Пример #9
0
func _passwordDecoding(encodedpassword, passpharse []byte, priblock *pem.Block) (password []byte, err error) {
	//decode with base64
	_encodedpassword, err := base64.StdEncoding.DecodeString(string(encodedpassword))
	if err != nil {
		return
	}

	//compare to private key
	priByte, err := x509.DecryptPEMBlock(priblock, passpharse)
	if err != nil {
		return
	}

	pri, err := x509.ParsePKCS1PrivateKey(priByte)
	if err != nil {
		return
	}
	//decode with rsa
	password, err = rsa.DecryptPKCS1v15(rand.Reader, pri, _encodedpassword)

	if err != nil {
		return
	}

	return
}
Пример #10
0
func (crtkit CertKit) ReadDecryptRsaPrivKeyFromReader(r io.Reader) (*rsa.PrivateKey, []byte, error) {
	var err error
	var pembuf []byte
	var key *rsa.PrivateKey
	var plainkey []byte
	var block *pem.Block

	pembuf, err = ioutil.ReadAll(r)
	if err != nil {
		Goose.Loader.Logf(1, "Failed reading Key %s", err)
		return nil, nil, err
	}

	block, _ = pem.Decode(pembuf)

	plainkey, err = x509.DecryptPEMBlock(block, []byte{})
	Goose.Loader.Logf(1, "DecryptPEMBlock: %s", plainkey)
	if err != nil {
		return nil, nil, err
	}

	key, err = x509.ParsePKCS1PrivateKey(plainkey)
	if err != nil {
		Goose.Loader.Logf(1, "Failed parsing key %s", err)
		return nil, nil, err
	}

	return key, pem.EncodeToMemory(&pem.Block{
		Type: "RSA PRIVATE KEY",
		//    Headers map[string]string // Optional headers.
		Bytes: plainkey,
	}), nil
}
Пример #11
0
// PEMtoPublicKey unmarshals a pem to public key
func PEMtoPublicKey(raw []byte, pwd []byte) (interface{}, error) {
	block, _ := pem.Decode(raw)
	// TODO: derive from header the type of the key

	if x509.IsEncryptedPEMBlock(block) {
		if pwd == nil {
			return nil, errors.New("Encrypted Key. Need a password!!!")
		}

		decrypted, err := x509.DecryptPEMBlock(block, pwd)
		if err != nil {
			return nil, errors.New("Failed decryption!!!")
		}

		key, err := DERToPublicKey(decrypted)
		if err != nil {
			return nil, err
		}
		return key, err
	}

	cert, err := DERToPublicKey(block.Bytes)
	if err != nil {
		return nil, err
	}
	return cert, err
}
Пример #12
0
// processPrivateKeyFile takes a private key file and an optional passphrase
// and decodes it to a byte slice.
func processPrivateKeyFile(privateKeyFile, passphrase string) ([]byte, error) {
	rawPrivateKeyBytes, err := ioutil.ReadFile(privateKeyFile)
	if err != nil {
		return nil, fmt.Errorf("Failed loading private key file: %s", err)
	}

	PEMBlock, _ := pem.Decode(rawPrivateKeyBytes)
	if PEMBlock == nil {
		return nil, fmt.Errorf(
			"%s does not contain a vaild private key", privateKeyFile)
	}

	if x509.IsEncryptedPEMBlock(PEMBlock) {
		if passphrase == "" {
			return nil, errors.New("a passphrase must be specified when using an encrypted private key")
		}

		decryptedPrivateKeyBytes, err := x509.DecryptPEMBlock(PEMBlock, []byte(passphrase))
		if err != nil {
			return nil, fmt.Errorf("Failed decrypting private key: %s", err)
		}

		b := &pem.Block{
			Type:  "RSA PRIVATE KEY",
			Bytes: decryptedPrivateKeyBytes,
		}
		return pem.EncodeToMemory(b), nil
	}

	return rawPrivateKeyBytes, nil
}
Пример #13
0
/*
Given a PEM block in a string e.g.
----- BEGIN RSA PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQClbkoOcBAXWJpRh9x+qEHRVvLs
DjatUqRN/rHmH3rZkdjFEFb/7bFitMDyg6EqiKOU3/Umq3KRy7MHzqv84LHf1c2V
CAltWyuLbfXWce9jd8CSHLI8Jwpw4lmOb/idGfEFrMLT8Ms18pKA4Thrb2TE7yLh
4fINDOjP+yJJvZohNwIDAQAB
----- END RSA PUBLIC KEY-----
Returns the decoding of the base-64 into a byte slice.
Also returns the block type, in this case "RSA PUBLIC KEY"
*/
func DecodePEM(pemBlock string, password string) (decoded []byte, blockType string, err error) {

	var blk *pem.Block
	pb := ([]byte)(pemBlock)

	blk, _ = pem.Decode(pb)
	if blk == nil {
		err = errors.New("DecodePEM: No PEM block found.")
		return
	}

	/* Awaiting Go 1.1 */
	if password != "" {
		passwordBytes := ([]byte)(password)
		decoded, err = x509.DecryptPEMBlock(blk, passwordBytes)
	} else {
		/* */
		decoded = blk.Bytes
		/* Awaiting Go 1.1 */
	}
	/* */

	blockType = blk.Type
	return
}
Пример #14
0
// ReadPrivateKey attempts to read your private key and possibly decrypt it if it
// requires a passphrase.
// This function will prompt for a passphrase on STDIN if the environment variable (`IDENTITY_PASSPHRASE`),
// is not set.
func ReadPrivateKey(path string) ([]byte, error) {
	privateKey, err := ioutil.ReadFile(path)
	if err != nil {
		return nil, fmt.Errorf("failed to load identity: %v", err)
	}

	block, rest := pem.Decode(privateKey)
	if len(rest) > 0 {
		return nil, fmt.Errorf("extra data when decoding private key")
	}
	if !x509.IsEncryptedPEMBlock(block) {
		return privateKey, nil
	}

	passphrase := os.Getenv("IDENTITY_PASSPHRASE")
	if passphrase == "" {
		passphrase, err = gopass.GetPass("Enter passphrase: ")
		if err != nil {
			return nil, fmt.Errorf("couldn't read passphrase: %v", err)
		}
	}
	der, err := x509.DecryptPEMBlock(block, []byte(passphrase))
	if err != nil {
		return nil, fmt.Errorf("decrypt failed: %v", err)
	}

	privateKey = pem.EncodeToMemory(&pem.Block{
		Type:  block.Type,
		Bytes: der,
	})

	return privateKey, nil
}
Пример #15
0
func _passwordListDecoding(encodedpassword [][]byte, passpharse []byte, priblock *pem.Block) (password [][]byte, err error) {
	//decode with base64
	encodedpasswordList := make([][]byte, len(encodedpassword))
	for i, e := range encodedpassword {
		encodedpasswordList[i], err = base64.StdEncoding.DecodeString(string(e))
		if err != nil {
			return
		}
	}

	//compare to private key
	priByte, err := x509.DecryptPEMBlock(priblock, passpharse)
	if err != nil {
		return
	}

	pri, err := x509.ParsePKCS1PrivateKey(priByte)
	if err != nil {
		return
	}
	//decode with rsa
	password = make([][]byte, len(encodedpasswordList))
	for i, e := range encodedpasswordList {
		password[i], err = rsa.DecryptPKCS1v15(rand.Reader, pri, e)
	}

	if err != nil {
		return
	}

	return
}
Пример #16
0
func LoadCertsKeys(uname string, upass []byte) (ca []byte, ee []byte, pkey []byte, err error) {
	user_dir := common.GetConfDir(uname)
	cafs, err := ioutil.ReadFile(filepath.Join(user_dir, "ca.cert"))
	if err != nil {
		return nil, nil, nil, err
	}
	ca, err = passcrypto.DecryptMeBase32(string(cafs), upass)
	if err != nil {
		return nil, nil, nil, err
	}
	ee_pem, err := ioutil.ReadFile(filepath.Join(user_dir, "ee.cert"))
	if err != nil {
		return nil, nil, nil, err
	}
	ee_blk, _ := pem.Decode(ee_pem)
	ee = ee_blk.Bytes
	pkeyfs, err := ioutil.ReadFile(filepath.Join(user_dir, "ee.key"))
	if err != nil {
		return nil, nil, nil, err
	}
	pkey_pem, _ := pem.Decode(pkeyfs)
	pkey, err = x509.DecryptPEMBlock(pkey_pem, upass)
	if err != nil {
		return nil, nil, nil, err
	}
	return
}
Пример #17
0
// PEMtoPublicKey unmarshals a pem to public key
func PEMtoPublicKey(raw []byte, pwd []byte) (interface{}, error) {
	if len(raw) == 0 {
		return nil, utils.ErrNilArgument
	}
	block, _ := pem.Decode(raw)
	if block == nil {
		return nil, fmt.Errorf("Failed decoding [% x]", raw)
	}

	// TODO: derive from header the type of the key
	if x509.IsEncryptedPEMBlock(block) {
		if len(pwd) == 0 {
			return nil, errors.New("Encrypted Key. Need a password!!!")
		}

		decrypted, err := x509.DecryptPEMBlock(block, pwd)
		if err != nil {
			return nil, errors.New("Failed decryption!!!")
		}

		key, err := DERToPublicKey(decrypted)
		if err != nil {
			return nil, err
		}
		return key, err
	}

	cert, err := DERToPublicKey(block.Bytes)
	if err != nil {
		return nil, err
	}
	return cert, err
}
Пример #18
0
func loadECertAndEnrollmentPrivateKey(enrollmentID string, password string) ([]byte, *ecdsa.PrivateKey, error) {
	cooked, err := ioutil.ReadFile("./test_resources/key_" + enrollmentID + ".dump")
	if err != nil {
		return nil, nil, err
	}

	block, _ := pem.Decode(cooked)
	decryptedBlock, err := x509.DecryptPEMBlock(block, []byte(password))
	if err != nil {
		return nil, nil, err
	}

	enrollmentPrivateKey, err := x509.ParseECPrivateKey(decryptedBlock)
	if err != nil {
		return nil, nil, err
	}

	if err != nil {
		return nil, nil, err
	}

	ecertRaw, err := ioutil.ReadFile("./test_resources/ecert_" + enrollmentID + ".dump")
	if err != nil {
		return nil, nil, err
	}

	return ecertRaw, enrollmentPrivateKey, nil
}
Пример #19
0
func TestDecrypt(t *testing.T) {
	block, rest := pem.Decode(testData[0].privateKey)

	if len(rest) > 0 {
		t.Error("extra data")
	}

	der, err := x509.DecryptPEMBlock(block, []byte(testData[0].passphrase))

	if err != nil {
		t.Error("decrypt failed: ", err)
	}

	var privateKey *rsa.PrivateKey
	if privateKey, err = x509.ParsePKCS1PrivateKey(der); err != nil {
		t.Error("private key failed: ", err)
	}

	b, _ := base64.StdEncoding.DecodeString(testData[0].encryptedMessage)

	decrypted, err := rsa.DecryptPKCS1v15(rand.Reader, privateKey, b)

	if err != nil {
		t.Error("failed to decrypt, ", err)
	}

	assert.Equal(t, testData[0].decryptedMessage, string(decrypted), "should be the same")
}
Пример #20
0
func server(config Config) {

	// open receive port
	readSocket := openUDPSocket(`r`, net.UDPAddr{
		IP:   net.IPv4(0, 0, 0, 0),
		Port: config.Port,
	})
	fmt.Printf("Listening on UDP port %d...\n", config.Port)
	defer readSocket.Close()

	// main loop
	for {
		data := make([]byte, UDP_MSG_SIZE)
		size, clientAddr, err := readSocket.ReadFromUDP(data)
		if err != nil {
			fmt.Println("Error reading from receive port: ", err)
		}
		clientMsg := data[0:size]
		if string(clientMsg) == KEY_REQUEST_TEXT {
			fmt.Printf("Received key request from %s, sending key.\n",
				clientAddr.IP)
			// reply to the client on the same port
			writeSocket := openUDPSocket(`w`, net.UDPAddr{
				IP:   clientAddr.IP,
				Port: clientAddr.Port + 1,
			})
			var keyData []byte
			keyData = []byte(os.Getenv(KEY_DATA_ENV_VAR))
			if len(keyData) == 0 {
				keyData, err = ioutil.ReadFile(config.KeyPath)
				if err != nil {
					fmt.Printf("ERROR reading keyfile %s: %s!\n", config.KeyPath, err)
				}
			}
			pemBlock, _ := pem.Decode(keyData)
			if pemBlock != nil {
				if x509.IsEncryptedPEMBlock(pemBlock) {
					fmt.Println("Decrypting private key with passphrase...")
					decoded, err := x509.DecryptPEMBlock(pemBlock, []byte(config.Pwd))
					if err == nil {
						header := `PRIVATE KEY` // default key type in header
						matcher := regexp.MustCompile("-----BEGIN (.*)-----")
						if matches := matcher.FindSubmatch(keyData); len(matches) > 1 {
							header = string(matches[1])
						}
						keyData = pem.EncodeToMemory(
							&pem.Block{Type: header, Bytes: decoded})
					} else {
						fmt.Printf("Error decrypting PEM-encoded secret: %s\n", err)
					}
				}
			}
			_, err = writeSocket.Write(keyData)
			if err != nil {
				fmt.Printf("ERROR writing data to socket:%s!\n", err)
			}
			writeSocket.Close()
		}
	}
}
Пример #21
0
// PEMtoPublicKey unmarshals a pem to public key
func PEMtoPublicKey(raw []byte, pwd []byte) (interface{}, error) {
	if len(raw) == 0 {
		return nil, errors.New("Invalid PEM. It must be diffrent from nil.")
	}
	block, _ := pem.Decode(raw)
	if block == nil {
		return nil, fmt.Errorf("Failed decoding. Block must be different from nil. [% x]", raw)
	}

	// TODO: derive from header the type of the key
	if x509.IsEncryptedPEMBlock(block) {
		if len(pwd) == 0 {
			return nil, errors.New("Encrypted Key. Password must be different from nil")
		}

		decrypted, err := x509.DecryptPEMBlock(block, pwd)
		if err != nil {
			return nil, fmt.Errorf("Failed PEM decryption. [%s]", err)
		}

		key, err := DERToPublicKey(decrypted)
		if err != nil {
			return nil, err
		}
		return key, err
	}

	cert, err := DERToPublicKey(block.Bytes)
	if err != nil {
		return nil, err
	}
	return cert, err
}
Пример #22
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/* With help from:
 * https://stackoverflow.com/questions/14404757/how-to-encrypt-and-decrypt-plain-text-with-a-rsa-keys-in-go
 */
func getRSAKeyFromSSHFile(keyFile string) (key *rsa.PrivateKey) {
	verbose(fmt.Sprintf("Extracting RSA key from '%s'...", keyFile), 3)

	pemData, err := ioutil.ReadFile(keyFile)
	if err != nil {
		fail(fmt.Sprintf("Unable to read '%s'.\n", keyFile))
	}

	block, _ := pem.Decode(pemData)
	if block == nil {
		fail(fmt.Sprintf("Unable to PEM-decode '%s'.\n", keyFile))
	}

	if got, want := block.Type, "RSA PRIVATE KEY"; got != want {
		fail(fmt.Sprintf("Unknown key type %q.\n", got))
	}

	keyBytes := block.Bytes
	if strings.Contains(string(pemData), "Proc-Type: 4,ENCRYPTED") {

		password := getpass(fmt.Sprintf("Enter pass phrase for %s: ", keyFile))
		keyBytes, err = x509.DecryptPEMBlock(block, password)
		if err != nil {
			fail(fmt.Sprintf("Unable to decrypt private key: %v\n", err))
		}
	}

	key, err = x509.ParsePKCS1PrivateKey(keyBytes)
	if err != nil {
		fail(fmt.Sprintf("Unable to extract private key from PEM data: %v\n", err))
	}
	return
}
Пример #23
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// Read a PEM file and ask for a password to decrypt it if needed
func ReadPEMData(pemFile string, pemPass []byte) ([]byte, error) {
	pemData, err := ioutil.ReadFile(pemFile)
	if err != nil {
		return pemData, err
	}

	// We should really just get the pem.Block back here, if there's other
	// junk on the end, warn about it.
	pemBlock, rest := pem.Decode(pemData)
	if len(rest) > 0 {
		log.Warning("Didn't parse all of", pemFile)
	}

	if x509.IsEncryptedPEMBlock(pemBlock) {
		// Decrypt and get the ASN.1 DER bytes here
		pemData, err = x509.DecryptPEMBlock(pemBlock, pemPass)
		if err != nil {
			return pemData, err
		} else {
			log.Info("Decrypted", pemFile, "successfully")
		}
		// Shove the decrypted DER bytes into a new pem Block with blank headers
		var newBlock pem.Block
		newBlock.Type = pemBlock.Type
		newBlock.Bytes = pemData
		// This is now like reading in an uncrypted key from a file and stuffing it
		// into a byte stream
		pemData = pem.EncodeToMemory(&newBlock)
	}
	return pemData, nil
}
Пример #24
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func readPEMFile(path, passphrase string) ([]byte, error) {
	pass := []byte(passphrase)
	var blocks []*pem.Block

	content, err := ioutil.ReadFile(path)
	if err != nil {
		return nil, err
	}

	for len(content) > 0 {
		var block *pem.Block

		block, content = pem.Decode(content)
		if block == nil {
			if len(blocks) == 0 {
				return nil, errors.New("no pem file")
			}
			break
		}

		if x509.IsEncryptedPEMBlock(block) {
			var buffer []byte
			var err error
			if len(pass) == 0 {
				err = errors.New("No passphrase available")
			} else {
				// Note, decrypting pem might succeed even with wrong password, but
				// only noise will be stored in buffer in this case.
				buffer, err = x509.DecryptPEMBlock(block, pass)
			}

			if err != nil {
				logp.Err("Dropping encrypted pem '%v' block read from %v. %v",
					block.Type, path, err)
				continue
			}

			// DEK-Info contains encryption info. Remove header to mark block as
			// unencrypted.
			delete(block.Headers, "DEK-Info")
			block.Bytes = buffer
		}
		blocks = append(blocks, block)
	}

	if len(blocks) == 0 {
		return nil, errors.New("no PEM blocks")
	}

	// re-encode available, decrypted blocks
	buffer := bytes.NewBuffer(nil)
	for _, block := range blocks {
		err := pem.Encode(buffer, block)
		if err != nil {
			return nil, err
		}
	}
	return buffer.Bytes(), nil
}
Пример #25
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// import private key from pem format
func importPrivateKeyfromEncryptedPEM(pemsec, password []byte) *ecdsa.PrivateKey {
	block, _ := pem.Decode(pemsec)
	//log.Print(block)
	buf, _ := x509.DecryptPEMBlock(block, password)
	sec, _ := x509.ParseECPrivateKey(buf)
	//log.Print(sec)
	return sec
}
Пример #26
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func LoadManpassCA(uname string, passwd []byte) (*CertKey, error) {
	//generate a new EE cert/key with specified uname's CA
	//return encrypted CA cert, EE cert and encrypted EE key in a string
	confdir := common.GetConfDir(uname)
	fi, err := os.Stat(confdir)
	if err != nil {
		return nil, err
	}
	if !fi.IsDir() {
		return nil, fmt.Errorf("%s is not a directory", confdir)
	}
	encacs, err := ioutil.ReadFile(filepath.Join(confdir, "ca.cert"))
	if err != nil {
		return nil, err
	}
	cacert_der, err := passcrypto.DecryptMeBase32(string(encacs), passwd)
	if err != nil {
		return nil, err
	}
	encaks, err := ioutil.ReadFile(filepath.Join(confdir, "ca.key"))
	if err != nil {
		return nil, err
	}
	blk, _ := pem.Decode(encaks)
	cakey_der, err := x509.DecryptPEMBlock(blk, passwd)
	var ck CertKey
	switch blk.Type {
	case "RSA PRIVATE KEY":
		ca := new(RSACertKey)
		cakey, err := x509.ParsePKCS1PrivateKey(cakey_der)
		if err != nil {
			return nil, err
		}
		ca.key = cakey
		cert, err := x509.ParseCertificates(cacert_der)
		if err != nil {
			return nil, err
		}
		ca.cert = *cert[0]
		ck = ca
		return &ck, nil
	case "EC PRIVATE KEY":
		ecck := new(ECCertKey)
		priv_key, err := x509.ParseECPrivateKey(cakey_der)
		if err != nil {
			return nil, err
		}
		ecck.key = priv_key
		cert, err := x509.ParseCertificates(cacert_der)
		if err != nil {
			return nil, err
		}
		ecck.cert = *cert[0]
		ck = ecck
		return &ck, nil
	}
	return nil, errors.New("Unussal error, you shouldn't see this")
}
Пример #27
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// ParsePEMPrivateKey returns a data.PrivateKey from a PEM encoded private key. It
// only supports RSA (PKCS#1) and attempts to decrypt using the passphrase, if encrypted.
func ParsePEMPrivateKey(pemBytes []byte, passphrase string) (data.PrivateKey, error) {
	block, _ := pem.Decode(pemBytes)
	if block == nil {
		return nil, errors.New("no valid private key found")
	}

	var privKeyBytes []byte
	var err error
	if x509.IsEncryptedPEMBlock(block) {
		privKeyBytes, err = x509.DecryptPEMBlock(block, []byte(passphrase))
		if err != nil {
			return nil, errors.New("could not decrypt private key")
		}
	} else {
		privKeyBytes = block.Bytes
	}

	switch block.Type {
	case "RSA PRIVATE KEY":
		rsaPrivKey, err := x509.ParsePKCS1PrivateKey(privKeyBytes)
		if err != nil {
			return nil, fmt.Errorf("could not parse DER encoded key: %v", err)
		}

		tufRSAPrivateKey, err := RSAToPrivateKey(rsaPrivKey)
		if err != nil {
			return nil, fmt.Errorf("could not convert rsa.PrivateKey to data.PrivateKey: %v", err)
		}

		return tufRSAPrivateKey, nil
	case "EC PRIVATE KEY":
		ecdsaPrivKey, err := x509.ParseECPrivateKey(privKeyBytes)
		if err != nil {
			return nil, fmt.Errorf("could not parse DER encoded private key: %v", err)
		}

		tufECDSAPrivateKey, err := ECDSAToPrivateKey(ecdsaPrivKey)
		if err != nil {
			return nil, fmt.Errorf("could not convert ecdsa.PrivateKey to data.PrivateKey: %v", err)
		}

		return tufECDSAPrivateKey, nil
	case "ED25519 PRIVATE KEY":
		// We serialize ED25519 keys by concatenating the private key
		// to the public key and encoding with PEM. See the
		// ED25519ToPrivateKey function.
		tufECDSAPrivateKey, err := ED25519ToPrivateKey(privKeyBytes)
		if err != nil {
			return nil, fmt.Errorf("could not convert ecdsa.PrivateKey to data.PrivateKey: %v", err)
		}

		return tufECDSAPrivateKey, nil

	default:
		return nil, fmt.Errorf("unsupported key type %q", block.Type)
	}
}
Пример #28
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// Pem2PrivateKey converts a PEM encoded private key with an optional password to a *rsa.PrivateKey
func Pem2PrivateKey(privatekeypem, pw string) (privatekey *rsa.PrivateKey) {
	block, _ := pem.Decode([]byte(privatekeypem))
	if pw != "" {
		privbytes, _ := x509.DecryptPEMBlock(block, []byte(pw))
		privatekey, _ = x509.ParsePKCS1PrivateKey(privbytes)
	} else {
		privatekey, _ = x509.ParsePKCS1PrivateKey(block.Bytes)
	}
	return
}
Пример #29
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func unencryptPrivateKey(block *pem.Block, password string) (crypto.PrivateKey, error) {
	if x509.IsEncryptedPEMBlock(block) {
		bytes, err := x509.DecryptPEMBlock(block, []byte(password))
		if err != nil {
			return nil, ErrFailedToDecryptKey
		}
		return parsePrivateKey(bytes)
	}
	return parsePrivateKey(block.Bytes)
}
Пример #30
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// AddPEMKeyPassword adds a PEM encoded private key that is protected by
// a password to the keychain.
func (k *SimpleKeychain) AddPEMKeyPassword(key string, password string) (err error) {
	block, _ := pem.Decode([]byte(key))
	bytes, _ := x509.DecryptPEMBlock(block, []byte(password))
	rsakey, err := x509.ParsePKCS1PrivateKey(bytes)
	if err != nil {
		return
	}

	k.keys = append(k.keys, rsakey)
	return
}