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-rw-r--r--vendor/golang.org/x/crypto/openpgp/keys.go168
-rw-r--r--vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go9
-rw-r--r--vendor/golang.org/x/crypto/openpgp/packet/packet.go44
-rw-r--r--vendor/golang.org/x/crypto/openpgp/packet/private_key.go9
-rw-r--r--vendor/golang.org/x/crypto/openpgp/packet/public_key.go11
-rw-r--r--vendor/golang.org/x/crypto/openpgp/packet/signature.go2
-rw-r--r--vendor/golang.org/x/crypto/openpgp/packet/userattribute.go2
-rw-r--r--vendor/golang.org/x/crypto/openpgp/write.go174
8 files changed, 273 insertions, 146 deletions
diff --git a/vendor/golang.org/x/crypto/openpgp/keys.go b/vendor/golang.org/x/crypto/openpgp/keys.go
index 68b14c6ae..3e2518600 100644
--- a/vendor/golang.org/x/crypto/openpgp/keys.go
+++ b/vendor/golang.org/x/crypto/openpgp/keys.go
@@ -325,16 +325,14 @@ func ReadEntity(packets *packet.Reader) (*Entity, error) {
if e.PrivateKey, ok = p.(*packet.PrivateKey); !ok {
packets.Unread(p)
return nil, errors.StructuralError("first packet was not a public/private key")
- } else {
- e.PrimaryKey = &e.PrivateKey.PublicKey
}
+ e.PrimaryKey = &e.PrivateKey.PublicKey
}
if !e.PrimaryKey.PubKeyAlgo.CanSign() {
return nil, errors.StructuralError("primary key cannot be used for signatures")
}
- var current *Identity
var revocations []*packet.Signature
EachPacket:
for {
@@ -347,32 +345,8 @@ EachPacket:
switch pkt := p.(type) {
case *packet.UserId:
- current = new(Identity)
- current.Name = pkt.Id
- current.UserId = pkt
- e.Identities[pkt.Id] = current
-
- for {
- p, err = packets.Next()
- if err == io.EOF {
- return nil, io.ErrUnexpectedEOF
- } else if err != nil {
- return nil, err
- }
-
- sig, ok := p.(*packet.Signature)
- if !ok {
- return nil, errors.StructuralError("user ID packet not followed by self-signature")
- }
-
- if (sig.SigType == packet.SigTypePositiveCert || sig.SigType == packet.SigTypeGenericCert) && sig.IssuerKeyId != nil && *sig.IssuerKeyId == e.PrimaryKey.KeyId {
- if err = e.PrimaryKey.VerifyUserIdSignature(pkt.Id, e.PrimaryKey, sig); err != nil {
- return nil, errors.StructuralError("user ID self-signature invalid: " + err.Error())
- }
- current.SelfSignature = sig
- break
- }
- current.Signatures = append(current.Signatures, sig)
+ if err := addUserID(e, packets, pkt); err != nil {
+ return nil, err
}
case *packet.Signature:
if pkt.SigType == packet.SigTypeKeyRevocation {
@@ -381,11 +355,9 @@ EachPacket:
// TODO: RFC4880 5.2.1 permits signatures
// directly on keys (eg. to bind additional
// revocation keys).
- } else if current == nil {
- return nil, errors.StructuralError("signature packet found before user id packet")
- } else {
- current.Signatures = append(current.Signatures, pkt)
}
+ // Else, ignoring the signature as it does not follow anything
+ // we would know to attach it to.
case *packet.PrivateKey:
if pkt.IsSubkey == false {
packets.Unread(p)
@@ -426,33 +398,105 @@ EachPacket:
return e, nil
}
+func addUserID(e *Entity, packets *packet.Reader, pkt *packet.UserId) error {
+ // Make a new Identity object, that we might wind up throwing away.
+ // We'll only add it if we get a valid self-signature over this
+ // userID.
+ identity := new(Identity)
+ identity.Name = pkt.Id
+ identity.UserId = pkt
+
+ for {
+ p, err := packets.Next()
+ if err == io.EOF {
+ break
+ } else if err != nil {
+ return err
+ }
+
+ sig, ok := p.(*packet.Signature)
+ if !ok {
+ packets.Unread(p)
+ break
+ }
+
+ if (sig.SigType == packet.SigTypePositiveCert || sig.SigType == packet.SigTypeGenericCert) && sig.IssuerKeyId != nil && *sig.IssuerKeyId == e.PrimaryKey.KeyId {
+ if err = e.PrimaryKey.VerifyUserIdSignature(pkt.Id, e.PrimaryKey, sig); err != nil {
+ return errors.StructuralError("user ID self-signature invalid: " + err.Error())
+ }
+ identity.SelfSignature = sig
+ e.Identities[pkt.Id] = identity
+ } else {
+ identity.Signatures = append(identity.Signatures, sig)
+ }
+ }
+
+ return nil
+}
+
func addSubkey(e *Entity, packets *packet.Reader, pub *packet.PublicKey, priv *packet.PrivateKey) error {
var subKey Subkey
subKey.PublicKey = pub
subKey.PrivateKey = priv
- p, err := packets.Next()
- if err == io.EOF {
- return io.ErrUnexpectedEOF
- }
- if err != nil {
- return errors.StructuralError("subkey signature invalid: " + err.Error())
+
+ for {
+ p, err := packets.Next()
+ if err == io.EOF {
+ break
+ } else if err != nil {
+ return errors.StructuralError("subkey signature invalid: " + err.Error())
+ }
+
+ sig, ok := p.(*packet.Signature)
+ if !ok {
+ packets.Unread(p)
+ break
+ }
+
+ if sig.SigType != packet.SigTypeSubkeyBinding && sig.SigType != packet.SigTypeSubkeyRevocation {
+ return errors.StructuralError("subkey signature with wrong type")
+ }
+
+ if err := e.PrimaryKey.VerifyKeySignature(subKey.PublicKey, sig); err != nil {
+ return errors.StructuralError("subkey signature invalid: " + err.Error())
+ }
+
+ switch sig.SigType {
+ case packet.SigTypeSubkeyRevocation:
+ subKey.Sig = sig
+ case packet.SigTypeSubkeyBinding:
+
+ if shouldReplaceSubkeySig(subKey.Sig, sig) {
+ subKey.Sig = sig
+ }
+ }
}
- var ok bool
- subKey.Sig, ok = p.(*packet.Signature)
- if !ok {
+
+ if subKey.Sig == nil {
return errors.StructuralError("subkey packet not followed by signature")
}
- if subKey.Sig.SigType != packet.SigTypeSubkeyBinding && subKey.Sig.SigType != packet.SigTypeSubkeyRevocation {
- return errors.StructuralError("subkey signature with wrong type")
- }
- err = e.PrimaryKey.VerifyKeySignature(subKey.PublicKey, subKey.Sig)
- if err != nil {
- return errors.StructuralError("subkey signature invalid: " + err.Error())
- }
+
e.Subkeys = append(e.Subkeys, subKey)
+
return nil
}
+func shouldReplaceSubkeySig(existingSig, potentialNewSig *packet.Signature) bool {
+ if potentialNewSig == nil {
+ return false
+ }
+
+ if existingSig == nil {
+ return true
+ }
+
+ if existingSig.SigType == packet.SigTypeSubkeyRevocation {
+ return false // never override a revocation signature
+ }
+
+ return potentialNewSig.CreationTime.After(existingSig.CreationTime)
+}
+
const defaultRSAKeyBits = 2048
// NewEntity returns an Entity that contains a fresh RSA/RSA keypair with a
@@ -487,7 +531,7 @@ func NewEntity(name, comment, email string, config *packet.Config) (*Entity, err
}
isPrimaryId := true
e.Identities[uid.Id] = &Identity{
- Name: uid.Name,
+ Name: uid.Id,
UserId: uid,
SelfSignature: &packet.Signature{
CreationTime: currentTime,
@@ -501,6 +545,10 @@ func NewEntity(name, comment, email string, config *packet.Config) (*Entity, err
IssuerKeyId: &e.PrimaryKey.KeyId,
},
}
+ err = e.Identities[uid.Id].SelfSignature.SignUserId(uid.Id, e.PrimaryKey, e.PrivateKey, config)
+ if err != nil {
+ return nil, err
+ }
// If the user passes in a DefaultHash via packet.Config,
// set the PreferredHash for the SelfSignature.
@@ -508,6 +556,11 @@ func NewEntity(name, comment, email string, config *packet.Config) (*Entity, err
e.Identities[uid.Id].SelfSignature.PreferredHash = []uint8{hashToHashId(config.DefaultHash)}
}
+ // Likewise for DefaultCipher.
+ if config != nil && config.DefaultCipher != 0 {
+ e.Identities[uid.Id].SelfSignature.PreferredSymmetric = []uint8{uint8(config.DefaultCipher)}
+ }
+
e.Subkeys = make([]Subkey, 1)
e.Subkeys[0] = Subkey{
PublicKey: packet.NewRSAPublicKey(currentTime, &encryptingPriv.PublicKey),
@@ -525,13 +578,16 @@ func NewEntity(name, comment, email string, config *packet.Config) (*Entity, err
}
e.Subkeys[0].PublicKey.IsSubkey = true
e.Subkeys[0].PrivateKey.IsSubkey = true
-
+ err = e.Subkeys[0].Sig.SignKey(e.Subkeys[0].PublicKey, e.PrivateKey, config)
+ if err != nil {
+ return nil, err
+ }
return e, nil
}
-// SerializePrivate serializes an Entity, including private key material, to
-// the given Writer. For now, it must only be used on an Entity returned from
-// NewEntity.
+// SerializePrivate serializes an Entity, including private key material, but
+// excluding signatures from other entities, to the given Writer.
+// Identities and subkeys are re-signed in case they changed since NewEntry.
// If config is nil, sensible defaults will be used.
func (e *Entity) SerializePrivate(w io.Writer, config *packet.Config) (err error) {
err = e.PrivateKey.Serialize(w)
@@ -569,8 +625,8 @@ func (e *Entity) SerializePrivate(w io.Writer, config *packet.Config) (err error
return nil
}
-// Serialize writes the public part of the given Entity to w. (No private
-// key material will be output).
+// Serialize writes the public part of the given Entity to w, including
+// signatures from other entities. No private key material will be output.
func (e *Entity) Serialize(w io.Writer) error {
err := e.PrimaryKey.Serialize(w)
if err != nil {
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go b/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go
index 266840d05..02b372cf3 100644
--- a/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go
+++ b/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go
@@ -42,12 +42,18 @@ func (e *EncryptedKey) parse(r io.Reader) (err error) {
switch e.Algo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
e.encryptedMPI1.bytes, e.encryptedMPI1.bitLength, err = readMPI(r)
+ if err != nil {
+ return
+ }
case PubKeyAlgoElGamal:
e.encryptedMPI1.bytes, e.encryptedMPI1.bitLength, err = readMPI(r)
if err != nil {
return
}
e.encryptedMPI2.bytes, e.encryptedMPI2.bitLength, err = readMPI(r)
+ if err != nil {
+ return
+ }
}
_, err = consumeAll(r)
return
@@ -72,7 +78,8 @@ func (e *EncryptedKey) Decrypt(priv *PrivateKey, config *Config) error {
// padding oracle attacks.
switch priv.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
- b, err = rsa.DecryptPKCS1v15(config.Random(), priv.PrivateKey.(*rsa.PrivateKey), e.encryptedMPI1.bytes)
+ k := priv.PrivateKey.(*rsa.PrivateKey)
+ b, err = rsa.DecryptPKCS1v15(config.Random(), k, padToKeySize(&k.PublicKey, e.encryptedMPI1.bytes))
case PubKeyAlgoElGamal:
c1 := new(big.Int).SetBytes(e.encryptedMPI1.bytes)
c2 := new(big.Int).SetBytes(e.encryptedMPI2.bytes)
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/packet.go b/vendor/golang.org/x/crypto/openpgp/packet/packet.go
index 3eded93f0..5af64c542 100644
--- a/vendor/golang.org/x/crypto/openpgp/packet/packet.go
+++ b/vendor/golang.org/x/crypto/openpgp/packet/packet.go
@@ -11,10 +11,12 @@ import (
"crypto/aes"
"crypto/cipher"
"crypto/des"
- "golang.org/x/crypto/cast5"
- "golang.org/x/crypto/openpgp/errors"
+ "crypto/rsa"
"io"
"math/big"
+
+ "golang.org/x/crypto/cast5"
+ "golang.org/x/crypto/openpgp/errors"
)
// readFull is the same as io.ReadFull except that reading zero bytes returns
@@ -402,14 +404,16 @@ const (
type PublicKeyAlgorithm uint8
const (
- PubKeyAlgoRSA PublicKeyAlgorithm = 1
- PubKeyAlgoRSAEncryptOnly PublicKeyAlgorithm = 2
- PubKeyAlgoRSASignOnly PublicKeyAlgorithm = 3
- PubKeyAlgoElGamal PublicKeyAlgorithm = 16
- PubKeyAlgoDSA PublicKeyAlgorithm = 17
+ PubKeyAlgoRSA PublicKeyAlgorithm = 1
+ PubKeyAlgoElGamal PublicKeyAlgorithm = 16
+ PubKeyAlgoDSA PublicKeyAlgorithm = 17
// RFC 6637, Section 5.
PubKeyAlgoECDH PublicKeyAlgorithm = 18
PubKeyAlgoECDSA PublicKeyAlgorithm = 19
+
+ // Deprecated in RFC 4880, Section 13.5. Use key flags instead.
+ PubKeyAlgoRSAEncryptOnly PublicKeyAlgorithm = 2
+ PubKeyAlgoRSASignOnly PublicKeyAlgorithm = 3
)
// CanEncrypt returns true if it's possible to encrypt a message to a public
@@ -500,19 +504,17 @@ func readMPI(r io.Reader) (mpi []byte, bitLength uint16, err error) {
numBytes := (int(bitLength) + 7) / 8
mpi = make([]byte, numBytes)
_, err = readFull(r, mpi)
- return
-}
-
-// mpiLength returns the length of the given *big.Int when serialized as an
-// MPI.
-func mpiLength(n *big.Int) (mpiLengthInBytes int) {
- mpiLengthInBytes = 2 /* MPI length */
- mpiLengthInBytes += (n.BitLen() + 7) / 8
+ // According to RFC 4880 3.2. we should check that the MPI has no leading
+ // zeroes (at least when not an encrypted MPI?), but this implementation
+ // does generate leading zeroes, so we keep accepting them.
return
}
// writeMPI serializes a big integer to w.
func writeMPI(w io.Writer, bitLength uint16, mpiBytes []byte) (err error) {
+ // Note that we can produce leading zeroes, in violation of RFC 4880 3.2.
+ // Implementations seem to be tolerant of them, and stripping them would
+ // make it complex to guarantee matching re-serialization.
_, err = w.Write([]byte{byte(bitLength >> 8), byte(bitLength)})
if err == nil {
_, err = w.Write(mpiBytes)
@@ -525,6 +527,18 @@ func writeBig(w io.Writer, i *big.Int) error {
return writeMPI(w, uint16(i.BitLen()), i.Bytes())
}
+// padToKeySize left-pads a MPI with zeroes to match the length of the
+// specified RSA public.
+func padToKeySize(pub *rsa.PublicKey, b []byte) []byte {
+ k := (pub.N.BitLen() + 7) / 8
+ if len(b) >= k {
+ return b
+ }
+ bb := make([]byte, k)
+ copy(bb[len(bb)-len(b):], b)
+ return bb
+}
+
// CompressionAlgo Represents the different compression algorithms
// supported by OpenPGP (except for BZIP2, which is not currently
// supported). See Section 9.3 of RFC 4880.
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/private_key.go b/vendor/golang.org/x/crypto/openpgp/packet/private_key.go
index 34734cc63..bd31cceac 100644
--- a/vendor/golang.org/x/crypto/openpgp/packet/private_key.go
+++ b/vendor/golang.org/x/crypto/openpgp/packet/private_key.go
@@ -64,14 +64,19 @@ func NewECDSAPrivateKey(currentTime time.Time, priv *ecdsa.PrivateKey) *PrivateK
return pk
}
-// NewSignerPrivateKey creates a sign-only PrivateKey from a crypto.Signer that
+// NewSignerPrivateKey creates a PrivateKey from a crypto.Signer that
// implements RSA or ECDSA.
func NewSignerPrivateKey(currentTime time.Time, signer crypto.Signer) *PrivateKey {
pk := new(PrivateKey)
+ // In general, the public Keys should be used as pointers. We still
+ // type-switch on the values, for backwards-compatibility.
switch pubkey := signer.Public().(type) {
+ case *rsa.PublicKey:
+ pk.PublicKey = *NewRSAPublicKey(currentTime, pubkey)
case rsa.PublicKey:
pk.PublicKey = *NewRSAPublicKey(currentTime, &pubkey)
- pk.PubKeyAlgo = PubKeyAlgoRSASignOnly
+ case *ecdsa.PublicKey:
+ pk.PublicKey = *NewECDSAPublicKey(currentTime, pubkey)
case ecdsa.PublicKey:
pk.PublicKey = *NewECDSAPublicKey(currentTime, &pubkey)
default:
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/public_key.go b/vendor/golang.org/x/crypto/openpgp/packet/public_key.go
index ead26233d..fcd5f5251 100644
--- a/vendor/golang.org/x/crypto/openpgp/packet/public_key.go
+++ b/vendor/golang.org/x/crypto/openpgp/packet/public_key.go
@@ -244,7 +244,12 @@ func NewECDSAPublicKey(creationTime time.Time, pub *ecdsa.PublicKey) *PublicKey
}
pk.ec.p.bytes = elliptic.Marshal(pub.Curve, pub.X, pub.Y)
- pk.ec.p.bitLength = uint16(8 * len(pk.ec.p.bytes))
+
+ // The bit length is 3 (for the 0x04 specifying an uncompressed key)
+ // plus two field elements (for x and y), which are rounded up to the
+ // nearest byte. See https://tools.ietf.org/html/rfc6637#section-6
+ fieldBytes := (pub.Curve.Params().BitSize + 7) & ^7
+ pk.ec.p.bitLength = uint16(3 + fieldBytes + fieldBytes)
pk.setFingerPrintAndKeyId()
return pk
@@ -515,7 +520,7 @@ func (pk *PublicKey) VerifySignature(signed hash.Hash, sig *Signature) (err erro
switch pk.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
rsaPublicKey, _ := pk.PublicKey.(*rsa.PublicKey)
- err = rsa.VerifyPKCS1v15(rsaPublicKey, sig.Hash, hashBytes, sig.RSASignature.bytes)
+ err = rsa.VerifyPKCS1v15(rsaPublicKey, sig.Hash, hashBytes, padToKeySize(rsaPublicKey, sig.RSASignature.bytes))
if err != nil {
return errors.SignatureError("RSA verification failure")
}
@@ -566,7 +571,7 @@ func (pk *PublicKey) VerifySignatureV3(signed hash.Hash, sig *SignatureV3) (err
switch pk.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
rsaPublicKey := pk.PublicKey.(*rsa.PublicKey)
- if err = rsa.VerifyPKCS1v15(rsaPublicKey, sig.Hash, hashBytes, sig.RSASignature.bytes); err != nil {
+ if err = rsa.VerifyPKCS1v15(rsaPublicKey, sig.Hash, hashBytes, padToKeySize(rsaPublicKey, sig.RSASignature.bytes)); err != nil {
return errors.SignatureError("RSA verification failure")
}
return
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/signature.go b/vendor/golang.org/x/crypto/openpgp/packet/signature.go
index 6ce0cbedb..b2a24a532 100644
--- a/vendor/golang.org/x/crypto/openpgp/packet/signature.go
+++ b/vendor/golang.org/x/crypto/openpgp/packet/signature.go
@@ -542,7 +542,7 @@ func (sig *Signature) Sign(h hash.Hash, priv *PrivateKey, config *Config) (err e
r, s, err = ecdsa.Sign(config.Random(), pk, digest)
} else {
var b []byte
- b, err = priv.PrivateKey.(crypto.Signer).Sign(config.Random(), digest, nil)
+ b, err = priv.PrivateKey.(crypto.Signer).Sign(config.Random(), digest, sig.Hash)
if err == nil {
r, s, err = unwrapECDSASig(b)
}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go b/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go
index 96a2b382a..d19ffbc78 100644
--- a/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go
+++ b/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go
@@ -80,7 +80,7 @@ func (uat *UserAttribute) Serialize(w io.Writer) (err error) {
// ImageData returns zero or more byte slices, each containing
// JPEG File Interchange Format (JFIF), for each photo in the
-// the user attribute packet.
+// user attribute packet.
func (uat *UserAttribute) ImageData() (imageData [][]byte) {
for _, sp := range uat.Contents {
if sp.SubType == UserAttrImageSubpacket && len(sp.Contents) > 16 {
diff --git a/vendor/golang.org/x/crypto/openpgp/write.go b/vendor/golang.org/x/crypto/openpgp/write.go
index 65a304cc8..4ee71784e 100644
--- a/vendor/golang.org/x/crypto/openpgp/write.go
+++ b/vendor/golang.org/x/crypto/openpgp/write.go
@@ -164,12 +164,12 @@ func hashToHashId(h crypto.Hash) uint8 {
return v
}
-// Encrypt encrypts a message to a number of recipients and, optionally, signs
-// it. hints contains optional information, that is also encrypted, that aids
-// the recipients in processing the message. The resulting WriteCloser must
-// be closed after the contents of the file have been written.
-// If config is nil, sensible defaults will be used.
-func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
+// writeAndSign writes the data as a payload package and, optionally, signs
+// it. hints contains optional information, that is also encrypted,
+// that aids the recipients in processing the message. The resulting
+// WriteCloser must be closed after the contents of the file have been
+// written. If config is nil, sensible defaults will be used.
+func writeAndSign(payload io.WriteCloser, candidateHashes []uint8, signed *Entity, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
var signer *packet.PrivateKey
if signed != nil {
signKey, ok := signed.signingKey(config.Now())
@@ -185,6 +185,83 @@ func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHint
}
}
+ var hash crypto.Hash
+ for _, hashId := range candidateHashes {
+ if h, ok := s2k.HashIdToHash(hashId); ok && h.Available() {
+ hash = h
+ break
+ }
+ }
+
+ // If the hash specified by config is a candidate, we'll use that.
+ if configuredHash := config.Hash(); configuredHash.Available() {
+ for _, hashId := range candidateHashes {
+ if h, ok := s2k.HashIdToHash(hashId); ok && h == configuredHash {
+ hash = h
+ break
+ }
+ }
+ }
+
+ if hash == 0 {
+ hashId := candidateHashes[0]
+ name, ok := s2k.HashIdToString(hashId)
+ if !ok {
+ name = "#" + strconv.Itoa(int(hashId))
+ }
+ return nil, errors.InvalidArgumentError("cannot encrypt because no candidate hash functions are compiled in. (Wanted " + name + " in this case.)")
+ }
+
+ if signer != nil {
+ ops := &packet.OnePassSignature{
+ SigType: packet.SigTypeBinary,
+ Hash: hash,
+ PubKeyAlgo: signer.PubKeyAlgo,
+ KeyId: signer.KeyId,
+ IsLast: true,
+ }
+ if err := ops.Serialize(payload); err != nil {
+ return nil, err
+ }
+ }
+
+ if hints == nil {
+ hints = &FileHints{}
+ }
+
+ w := payload
+ if signer != nil {
+ // If we need to write a signature packet after the literal
+ // data then we need to stop literalData from closing
+ // encryptedData.
+ w = noOpCloser{w}
+
+ }
+ var epochSeconds uint32
+ if !hints.ModTime.IsZero() {
+ epochSeconds = uint32(hints.ModTime.Unix())
+ }
+ literalData, err := packet.SerializeLiteral(w, hints.IsBinary, hints.FileName, epochSeconds)
+ if err != nil {
+ return nil, err
+ }
+
+ if signer != nil {
+ return signatureWriter{payload, literalData, hash, hash.New(), signer, config}, nil
+ }
+ return literalData, nil
+}
+
+// Encrypt encrypts a message to a number of recipients and, optionally, signs
+// it. hints contains optional information, that is also encrypted, that aids
+// the recipients in processing the message. The resulting WriteCloser must
+// be closed after the contents of the file have been written.
+// If config is nil, sensible defaults will be used.
+func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
+ if len(to) == 0 {
+ return nil, errors.InvalidArgumentError("no encryption recipient provided")
+ }
+
// These are the possible ciphers that we'll use for the message.
candidateCiphers := []uint8{
uint8(packet.CipherAES128),
@@ -194,6 +271,7 @@ func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHint
// These are the possible hash functions that we'll use for the signature.
candidateHashes := []uint8{
hashToHashId(crypto.SHA256),
+ hashToHashId(crypto.SHA384),
hashToHashId(crypto.SHA512),
hashToHashId(crypto.SHA1),
hashToHashId(crypto.RIPEMD160),
@@ -241,33 +319,6 @@ func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHint
}
}
- var hash crypto.Hash
- for _, hashId := range candidateHashes {
- if h, ok := s2k.HashIdToHash(hashId); ok && h.Available() {
- hash = h
- break
- }
- }
-
- // If the hash specified by config is a candidate, we'll use that.
- if configuredHash := config.Hash(); configuredHash.Available() {
- for _, hashId := range candidateHashes {
- if h, ok := s2k.HashIdToHash(hashId); ok && h == configuredHash {
- hash = h
- break
- }
- }
- }
-
- if hash == 0 {
- hashId := candidateHashes[0]
- name, ok := s2k.HashIdToString(hashId)
- if !ok {
- name = "#" + strconv.Itoa(int(hashId))
- }
- return nil, errors.InvalidArgumentError("cannot encrypt because no candidate hash functions are compiled in. (Wanted " + name + " in this case.)")
- }
-
symKey := make([]byte, cipher.KeySize())
if _, err := io.ReadFull(config.Random(), symKey); err != nil {
return nil, err
@@ -279,49 +330,38 @@ func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHint
}
}
- encryptedData, err := packet.SerializeSymmetricallyEncrypted(ciphertext, cipher, symKey, config)
+ payload, err := packet.SerializeSymmetricallyEncrypted(ciphertext, cipher, symKey, config)
if err != nil {
return
}
- if signer != nil {
- ops := &packet.OnePassSignature{
- SigType: packet.SigTypeBinary,
- Hash: hash,
- PubKeyAlgo: signer.PubKeyAlgo,
- KeyId: signer.KeyId,
- IsLast: true,
- }
- if err := ops.Serialize(encryptedData); err != nil {
- return nil, err
- }
- }
+ return writeAndSign(payload, candidateHashes, signed, hints, config)
+}
- if hints == nil {
- hints = &FileHints{}
+// Sign signs a message. The resulting WriteCloser must be closed after the
+// contents of the file have been written. hints contains optional information
+// that aids the recipients in processing the message.
+// If config is nil, sensible defaults will be used.
+func Sign(output io.Writer, signed *Entity, hints *FileHints, config *packet.Config) (input io.WriteCloser, err error) {
+ if signed == nil {
+ return nil, errors.InvalidArgumentError("no signer provided")
}
- w := encryptedData
- if signer != nil {
- // If we need to write a signature packet after the literal
- // data then we need to stop literalData from closing
- // encryptedData.
- w = noOpCloser{encryptedData}
-
- }
- var epochSeconds uint32
- if !hints.ModTime.IsZero() {
- epochSeconds = uint32(hints.ModTime.Unix())
- }
- literalData, err := packet.SerializeLiteral(w, hints.IsBinary, hints.FileName, epochSeconds)
- if err != nil {
- return nil, err
+ // These are the possible hash functions that we'll use for the signature.
+ candidateHashes := []uint8{
+ hashToHashId(crypto.SHA256),
+ hashToHashId(crypto.SHA384),
+ hashToHashId(crypto.SHA512),
+ hashToHashId(crypto.SHA1),
+ hashToHashId(crypto.RIPEMD160),
}
-
- if signer != nil {
- return signatureWriter{encryptedData, literalData, hash, hash.New(), signer, config}, nil
+ defaultHashes := candidateHashes[len(candidateHashes)-1:]
+ preferredHashes := signed.primaryIdentity().SelfSignature.PreferredHash
+ if len(preferredHashes) == 0 {
+ preferredHashes = defaultHashes
}
- return literalData, nil
+ candidateHashes = intersectPreferences(candidateHashes, preferredHashes)
+ return writeAndSign(noOpCloser{output}, candidateHashes, signed, hints, config)
}
// signatureWriter hashes the contents of a message while passing it along to
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-18 05:59:49 +0000