Ejemplo n.º 1
0
func v3KeyReader(t *testing.T) io.Reader {
	armorBlock, err := armor.Decode(bytes.NewBufferString(keySigV3Armor))
	if err != nil {
		t.Fatalf("armor Decode failed: %v", err)
	}
	return armorBlock.Body
}
Ejemplo n.º 2
0
func PGPDecrypt(source io.Reader, sink io.Writer, kr openpgp.KeyRing) (*SignatureStatus, error) {
	peeker := NewPeeker(source)

	var r io.Reader
	r = peeker

	armored, clearsigned := PGPDetect(peeker)
	if clearsigned {
		return pgpDecryptClearsign(peeker, sink, kr)
	}

	if armored {
		b, err := armor.Decode(r)
		if err != nil {
			return nil, err
		}
		r = b.Body
	}

	G.Log.Debug("Calling into openpgp ReadMessage for decryption")
	md, err := openpgp.ReadMessage(r, kr, nil, nil)
	if err != nil {
		if err == errors.ErrKeyIncorrect {
			return nil, PGPNoDecryptionKeyError{Msg: "unable to find decryption key for this message"}
		}
		return nil, err
	}

	if md.IsSigned {
		G.Log.Debug("message is signed (SignedByKeyId: %+v) (have key? %v)", md.SignedByKeyId, md.SignedBy != nil)
	}

	n, err := io.Copy(sink, md.UnverifiedBody)
	if err != nil {
		return nil, err
	}
	G.Log.Debug("PGPDecrypt: copied %d bytes to writer", n)

	var status SignatureStatus
	if md.IsSigned {
		status.IsSigned = true
		status.KeyID = md.SignedByKeyId
		if md.Signature != nil {
			status.SignatureTime = md.Signature.CreationTime
		}
		if md.SignedBy != nil {
			status.Entity = md.SignedBy.Entity
		}
		if md.SignatureError != nil {
			status.SignatureError = md.SignatureError
		} else {
			status.Verified = true
		}
	}

	status.RecipientKeyIDs = md.EncryptedToKeyIds

	return &status, nil
}
Ejemplo n.º 3
0
func verifySig(t *testing.T, keyFile, sigFile string) {
	var f *os.File
	var err error
	var b *armor.Block
	var p packet.Packet

	if f, err = os.Open(keyFile); err != nil {
		t.Fatal(err)
	}
	defer f.Close()

	if b, err = armor.Decode(f); err != nil {
		t.Fatal(err)
	}
	if p, err = packet.Read(b.Body); err != nil {
		t.Fatal(err)
	}

	priv, ok := p.(*packet.PrivateKey)
	if !ok {
		t.Fatal("couldn't parse private key")
	}

	if f, err = os.Open(sigFile); err != nil {
		t.Fatal(err)
	}
	defer f.Close()

	if b, err = armor.Decode(f); err != nil {
		t.Fatal(err)
	}
	if p, err = packet.Read(b.Body); err != nil {
		t.Fatal(err)
	}

	sig, ok := p.(*packet.Signature)
	if !ok {
		t.Fatal("couldn't parse signature")
	}

	signed := sig.Hash.New()
	signed.Write([]byte(msg))
	if err := priv.PublicKey.VerifySignature(signed, sig); err != nil {
		t.Fatal(err)
	}
}
Ejemplo n.º 4
0
func TestECDHDecryptionNotImplemented(t *testing.T) {
	keys := openAndDecryptKey(t, privKey, passphrase)
	b, err := armor.Decode(strings.NewReader(gpgEncryption))
	if err != nil {
		t.Fatal(err)
	}
	source := b.Body
	_, err = ReadMessage(source, keys, nil, nil)
	if err == nil {
		t.Fatal("expected a failure, since this feature isn't implemented yet")
	}
}
Ejemplo n.º 5
0
// readArmored reads an armored block with the given type.
func readArmored(r io.Reader, expectedType string) (body io.Reader, err error) {
	block, err := armor.Decode(r)
	if err != nil {
		return
	}

	if block.Type != expectedType {
		return nil, errors.InvalidArgumentError("expected '" + expectedType + "', got: " + block.Type)
	}

	return block.Body, nil
}
Ejemplo n.º 6
0
func PGPOpenSig(armored string) (ps *ParsedSig, err error) {
	pso := ParsedSig{}
	pso.Block, err = armor.Decode(strings.NewReader(cleanPGPInput(armored)))
	if err != nil {
		return
	}
	pso.SigBody, err = ioutil.ReadAll(pso.Block.Body)
	if err != nil {
		return
	}
	ps = &pso
	return
}
Ejemplo n.º 7
0
// ReadArmoredKeyRing reads one or more public/private keys from an armor keyring file.
func ReadArmoredKeyRing(r io.Reader) (EntityList, error) {
	block, err := armor.Decode(r)
	if err == io.EOF {
		return nil, errors.InvalidArgumentError("no armored data found")
	}
	if err != nil {
		return nil, err
	}
	if block.Type != PublicKeyType && block.Type != PrivateKeyType {
		return nil, errors.InvalidArgumentError("expected public or private key block, got: " + block.Type)
	}

	return ReadKeyRing(block.Body)
}
Ejemplo n.º 8
0
// runDetached verifies a detached signature
func (e *PGPVerify) runDetached(ctx *Context) error {
	sk, err := NewScanKeys(ctx.SecretUI, ctx.IdentifyUI, &e.arg.TrackOptions, e.G())
	if err != nil {
		return err
	}
	checkfn := openpgp.CheckDetachedSignature
	if libkb.IsArmored(e.arg.Signature) {
		checkfn = openpgp.CheckArmoredDetachedSignature
	}
	signer, err := checkfn(sk, e.peek, bytes.NewReader(e.arg.Signature))
	if err != nil {
		return err
	}

	e.owner = sk.Owner()
	e.signStatus = &libkb.SignatureStatus{IsSigned: true}

	if signer != nil {
		e.signStatus.Verified = true
		e.signStatus.Entity = signer
		if err := e.checkSignedBy(ctx); err != nil {
			return err
		}

		var r io.Reader = bytes.NewReader(e.arg.Signature)
		if libkb.IsArmored(e.arg.Signature) {
			block, err := armor.Decode(r)
			if err != nil {
				return err
			}
			r = block.Body
		}

		p, err := packet.Read(r)
		if err != nil {
			return err
		}

		if val, ok := p.(*packet.Signature); ok {
			e.signStatus.SignatureTime = val.CreationTime
		}

		fingerprint := libkb.PGPFingerprint(signer.PrimaryKey.Fingerprint)
		OutputSignatureSuccess(ctx, fingerprint, sk.Owner(), e.signStatus.SignatureTime)
	}

	return nil
}
Ejemplo n.º 9
0
// Decode finds the first clearsigned message in data and returns it, as well
// as the suffix of data which remains after the message.
func Decode(data []byte) (b *Block, rest []byte) {
	// start begins with a newline. However, at the very beginning of
	// the byte array, we'll accept the start string without it.
	rest = data
	if bytes.HasPrefix(data, start[1:]) {
		rest = rest[len(start)-1:]
	} else if i := bytes.Index(data, start); i >= 0 {
		rest = rest[i+len(start):]
	} else {
		return nil, data
	}

	// Consume the start line.
	_, rest = getLine(rest)

	var line []byte
	b = &Block{
		Headers: make(textproto.MIMEHeader),
	}

	// Next come a series of header lines.
	for {
		// This loop terminates because getLine's second result is
		// always smaller than its argument.
		if len(rest) == 0 {
			return nil, data
		}
		// An empty line marks the end of the headers.
		if line, rest = getLine(rest); len(line) == 0 {
			break
		}

		i := bytes.Index(line, []byte{':'})
		if i == -1 {
			return nil, data
		}

		key, val := line[0:i], line[i+1:]
		key = bytes.TrimSpace(key)
		val = bytes.TrimSpace(val)
		b.Headers.Add(string(key), string(val))
	}

	firstLine := true
	for {
		start := rest

		line, rest = getLine(rest)
		if bytes.Equal(line, endText) {
			// Back up to the start of the line because armor expects to see the
			// header line.
			rest = start
			break
		}

		// The final CRLF isn't included in the hash so we don't write it until
		// we've seen the next line.
		if firstLine {
			firstLine = false
		} else {
			b.Bytes = append(b.Bytes, crlf...)
		}

		if bytes.HasPrefix(line, dashEscape) {
			line = line[2:]
		}
		line = bytes.TrimRight(line, " \t")
		b.Bytes = append(b.Bytes, line...)

		b.Plaintext = append(b.Plaintext, line...)
		b.Plaintext = append(b.Plaintext, lf)
	}

	// We want to find the extent of the armored data (including any newlines at
	// the end).
	i := bytes.Index(rest, end)
	if i == -1 {
		return nil, data
	}
	i += len(end)
	for i < len(rest) && (rest[i] == '\r' || rest[i] == '\n') {
		i++
	}
	armored := rest[:i]
	rest = rest[i:]

	var err error
	b.ArmoredSignature, err = armor.Decode(bytes.NewBuffer(armored))
	if err != nil {
		return nil, data
	}

	return b, rest
}
Ejemplo n.º 10
0
func PGPDecrypt(g *GlobalContext, source io.Reader, sink io.Writer, kr openpgp.KeyRing) (*SignatureStatus, error) {

	var sc StreamClassification
	var err error

	sc, source, err = ClassifyStream(source)
	if err != nil {
		return nil, err
	}

	if sc.Format != CryptoMessageFormatPGP {
		return nil, WrongCryptoFormatError{
			Wanted:    CryptoMessageFormatPGP,
			Received:  sc.Format,
			Operation: "decrypt",
		}
	}

	if sc.Type == CryptoMessageTypeClearSignature {
		return pgpDecryptClearsign(g, source, sink, kr)
	}

	if sc.Armored {
		b, err := armor.Decode(source)
		if err != nil {
			return nil, err
		}
		source = b.Body
	}

	g.Log.Debug("Calling into openpgp ReadMessage for decryption")
	md, err := openpgp.ReadMessage(source, kr, nil, nil)
	if err != nil {
		if err == errors.ErrKeyIncorrect {
			return nil, NoDecryptionKeyError{Msg: "unable to find a PGP decryption key for this message"}
		}
		return nil, err
	}

	if md.IsSigned {
		g.Log.Debug("message is signed (SignedByKeyId: %+v) (have key? %v)", md.SignedByKeyId, md.SignedBy != nil)
	}

	n, err := io.Copy(sink, md.UnverifiedBody)
	if err != nil {
		return nil, err
	}
	g.Log.Debug("PGPDecrypt: copied %d bytes to writer", n)

	var status SignatureStatus
	if md.IsSigned {
		status.IsSigned = true
		status.KeyID = md.SignedByKeyId
		if md.Signature != nil {
			status.SignatureTime = md.Signature.CreationTime
		}
		if md.SignedBy != nil {
			status.Entity = md.SignedBy.Entity
		}
		if md.SignatureError != nil {
			status.SignatureError = md.SignatureError
		} else {
			status.Verified = true
		}
	}

	status.RecipientKeyIDs = md.EncryptedToKeyIds

	return &status, nil
}