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signrpc: SharedKeyRequest accept raw pubkey
This commit is contained in:
yyforyongyu
parent
6efeee4d88
commit
1c80f9818f
@ -673,12 +673,18 @@ type SharedKeyRequest struct {
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// The ephemeral public key to use for the DH key derivation.
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EphemeralPubkey []byte `protobuf:"bytes,1,opt,name=ephemeral_pubkey,json=ephemeralPubkey,proto3" json:"ephemeral_pubkey,omitempty"`
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//
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//The optional key locator of the local key that should be used. If this
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//parameter is not set then the node's identity private key will be used.
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KeyLoc *KeyLocator `protobuf:"bytes,2,opt,name=key_loc,json=keyLoc,proto3" json:"key_loc,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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//Deprecated. The optional key locator of the local key that should be used.
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//If this parameter is not set then the node's identity private key will be
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//used.
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KeyLoc *KeyLocator `protobuf:"bytes,2,opt,name=key_loc,json=keyLoc,proto3" json:"key_loc,omitempty"` // Deprecated: Do not use.
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//
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//A key descriptor describes the key used for performing ECDH. Either a key
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//locator or a raw public key is expected, if neither is supplied, defaults to
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//the node's identity private key.
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KeyDesc *KeyDescriptor `protobuf:"bytes,3,opt,name=key_desc,json=keyDesc,proto3" json:"key_desc,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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}
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func (m *SharedKeyRequest) Reset() { *m = SharedKeyRequest{} }
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@ -713,6 +719,7 @@ func (m *SharedKeyRequest) GetEphemeralPubkey() []byte {
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return nil
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}
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// Deprecated: Do not use.
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func (m *SharedKeyRequest) GetKeyLoc() *KeyLocator {
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if m != nil {
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return m.KeyLoc
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@ -720,6 +727,13 @@ func (m *SharedKeyRequest) GetKeyLoc() *KeyLocator {
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return nil
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}
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func (m *SharedKeyRequest) GetKeyDesc() *KeyDescriptor {
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if m != nil {
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return m.KeyDesc
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}
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return nil
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}
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type SharedKeyResponse struct {
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// The shared public key, hashed with sha256.
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SharedKey []byte `protobuf:"bytes,1,opt,name=shared_key,json=sharedKey,proto3" json:"shared_key,omitempty"`
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@ -780,55 +794,56 @@ func init() {
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func init() { proto.RegisterFile("signrpc/signer.proto", fileDescriptor_4ecd772f6c7ffacf) }
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var fileDescriptor_4ecd772f6c7ffacf = []byte{
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|
||||
0x0e, 0xc6, 0xad, 0x20, 0xc9, 0xe3, 0xba, 0xf5, 0x78, 0x79, 0xae, 0xae, 0xfe, 0xed, 0x95, 0x60,
|
||||
0xe4, 0x39, 0x9c, 0x3f, 0x43, 0x4e, 0xdf, 0x61, 0x6d, 0x63, 0x83, 0xe9, 0x38, 0xfe, 0x06, 0xd3,
|
||||
0x7b, 0xae, 0xdf, 0xce, 0xde, 0x7c, 0x13, 0x53, 0xb9, 0x29, 0x56, 0xd3, 0x28, 0xdf, 0xce, 0x52,
|
||||
0x1a, 0x6f, 0x64, 0x46, 0xb3, 0x38, 0x43, 0x59, 0xe6, 0x3c, 0x99, 0xa5, 0xd9, 0x7a, 0x96, 0xd6,
|
||||
0x5f, 0x26, 0xce, 0xa2, 0x55, 0x5f, 0x7f, 0x9b, 0xbe, 0xff, 0x3b, 0x00, 0x00, 0xff, 0xff, 0x7d,
|
||||
0x28, 0x4a, 0xad, 0xb3, 0x06, 0x00, 0x00,
|
||||
}
|
||||
|
||||
// Reference imports to suppress errors if they are not otherwise used.
|
||||
@ -882,8 +897,9 @@ type SignerClient interface {
|
||||
//
|
||||
//DeriveSharedKey returns a shared secret key by performing Diffie-Hellman key
|
||||
//derivation between the ephemeral public key in the request and the node's
|
||||
//key specified in the key_loc parameter (or the node's identity private key
|
||||
//if no key locator is specified):
|
||||
//key specified in the key_desc parameter. Either a key locator or a raw
|
||||
//public key is expected in the key_desc, if neither is supplied, defaults to
|
||||
//the node's identity private key:
|
||||
//P_shared = privKeyNode * ephemeralPubkey
|
||||
//The resulting shared public key is serialized in the compressed format and
|
||||
//hashed with sha256, resulting in the final key length of 256bit.
|
||||
@ -984,8 +1000,9 @@ type SignerServer interface {
|
||||
//
|
||||
//DeriveSharedKey returns a shared secret key by performing Diffie-Hellman key
|
||||
//derivation between the ephemeral public key in the request and the node's
|
||||
//key specified in the key_loc parameter (or the node's identity private key
|
||||
//if no key locator is specified):
|
||||
//key specified in the key_desc parameter. Either a key locator or a raw
|
||||
//public key is expected in the key_desc, if neither is supplied, defaults to
|
||||
//the node's identity private key:
|
||||
//P_shared = privKeyNode * ephemeralPubkey
|
||||
//The resulting shared public key is serialized in the compressed format and
|
||||
//hashed with sha256, resulting in the final key length of 256bit.
|
||||
|
||||
@ -54,8 +54,9 @@ service Signer {
|
||||
/*
|
||||
DeriveSharedKey returns a shared secret key by performing Diffie-Hellman key
|
||||
derivation between the ephemeral public key in the request and the node's
|
||||
key specified in the key_loc parameter (or the node's identity private key
|
||||
if no key locator is specified):
|
||||
key specified in the key_desc parameter. Either a key locator or a raw
|
||||
public key is expected in the key_desc, if neither is supplied, defaults to
|
||||
the node's identity private key:
|
||||
P_shared = privKeyNode * ephemeralPubkey
|
||||
The resulting shared public key is serialized in the compressed format and
|
||||
hashed with sha256, resulting in the final key length of 256bit.
|
||||
@ -220,10 +221,18 @@ message SharedKeyRequest {
|
||||
bytes ephemeral_pubkey = 1;
|
||||
|
||||
/*
|
||||
The optional key locator of the local key that should be used. If this
|
||||
parameter is not set then the node's identity private key will be used.
|
||||
Deprecated. The optional key locator of the local key that should be used.
|
||||
If this parameter is not set then the node's identity private key will be
|
||||
used.
|
||||
*/
|
||||
KeyLocator key_loc = 2;
|
||||
KeyLocator key_loc = 2 [deprecated = true];
|
||||
|
||||
/*
|
||||
A key descriptor describes the key used for performing ECDH. Either a key
|
||||
locator or a raw public key is expected, if neither is supplied, defaults to
|
||||
the node's identity private key.
|
||||
*/
|
||||
KeyDescriptor key_desc = 3;
|
||||
}
|
||||
|
||||
message SharedKeyResponse {
|
||||
|
||||
@ -47,7 +47,7 @@
|
||||
},
|
||||
"/v2/signer/sharedkey": {
|
||||
"post": {
|
||||
"summary": "DeriveSharedKey returns a shared secret key by performing Diffie-Hellman key\nderivation between the ephemeral public key in the request and the node's\nkey specified in the key_loc parameter (or the node's identity private key\nif no key locator is specified):\nP_shared = privKeyNode * ephemeralPubkey\nThe resulting shared public key is serialized in the compressed format and\nhashed with sha256, resulting in the final key length of 256bit.",
|
||||
"summary": "DeriveSharedKey returns a shared secret key by performing Diffie-Hellman key\nderivation between the ephemeral public key in the request and the node's\nkey specified in the key_desc parameter. Either a key locator or a raw\npublic key is expected in the key_desc, if neither is supplied, defaults to\nthe node's identity private key:\nP_shared = privKeyNode * ephemeralPubkey\nThe resulting shared public key is serialized in the compressed format and\nhashed with sha256, resulting in the final key length of 256bit.",
|
||||
"operationId": "DeriveSharedKey",
|
||||
"responses": {
|
||||
"200": {
|
||||
@ -284,7 +284,11 @@
|
||||
},
|
||||
"key_loc": {
|
||||
"$ref": "#/definitions/signrpcKeyLocator",
|
||||
"description": "The optional key locator of the local key that should be used. If this\nparameter is not set then the node's identity private key will be used."
|
||||
"description": "Deprecated. The optional key locator of the local key that should be used.\nIf this parameter is not set then the node's identity private key will be\nused."
|
||||
},
|
||||
"key_desc": {
|
||||
"$ref": "#/definitions/signrpcKeyDescriptor",
|
||||
"description": "A key descriptor describes the key used for performing ECDH. Either a key\nlocator or a raw public key is expected, if neither is supplied, defaults to\nthe node's identity private key."
|
||||
}
|
||||
}
|
||||
},
|
||||
|
||||
@ -254,27 +254,11 @@ func (s *Server) SignOutputRaw(ctx context.Context, in *SignReq) (*SignResp, err
|
||||
// If this method doesn't return nil, then we know that user is
|
||||
// attempting to include a raw serialized pub key.
|
||||
if keyDesc.GetRawKeyBytes() != nil {
|
||||
rawKeyBytes := keyDesc.GetRawKeyBytes()
|
||||
|
||||
switch {
|
||||
// If the user provided a raw key, but it's of the
|
||||
// wrong length, then we'll return with an error.
|
||||
case len(rawKeyBytes) != 0 && len(rawKeyBytes) != 33:
|
||||
|
||||
return nil, fmt.Errorf("pubkey must be " +
|
||||
"serialized in compressed format if " +
|
||||
"specified")
|
||||
|
||||
// If a proper raw key was provided, then we'll attempt
|
||||
// to decode and parse it.
|
||||
case len(rawKeyBytes) != 0 && len(rawKeyBytes) == 33:
|
||||
targetPubKey, err = btcec.ParsePubKey(
|
||||
rawKeyBytes, btcec.S256(),
|
||||
)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("unable to "+
|
||||
"parse pubkey: %v", err)
|
||||
}
|
||||
targetPubKey, err = parseRawKeyBytes(
|
||||
keyDesc.GetRawKeyBytes(),
|
||||
)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
@ -507,38 +491,82 @@ func (s *Server) VerifyMessage(ctx context.Context,
|
||||
|
||||
// DeriveSharedKey returns a shared secret key by performing Diffie-Hellman key
|
||||
// derivation between the ephemeral public key in the request and the node's
|
||||
// key specified in the key_loc parameter (or the node's identity private key
|
||||
// if no key locator is specified):
|
||||
// P_shared = privKeyNode * ephemeralPubkey
|
||||
// key specified in the key_desc parameter. Either a key locator or a raw public
|
||||
// key is expected in the key_desc, if neither is supplied, defaults to the
|
||||
// node's identity private key. The old key_loc parameter in the request
|
||||
// shouldn't be used anymore.
|
||||
// The resulting shared public key is serialized in the compressed format and
|
||||
// hashed with sha256, resulting in the final key length of 256bit.
|
||||
func (s *Server) DeriveSharedKey(_ context.Context, in *SharedKeyRequest) (
|
||||
*SharedKeyResponse, error) {
|
||||
|
||||
if len(in.EphemeralPubkey) != 33 {
|
||||
return nil, fmt.Errorf("ephemeral pubkey must be " +
|
||||
"serialized in compressed format")
|
||||
}
|
||||
ephemeralPubkey, err := btcec.ParsePubKey(
|
||||
in.EphemeralPubkey, btcec.S256(),
|
||||
)
|
||||
// Check that EphemeralPubkey is valid.
|
||||
ephemeralPubkey, err := parseRawKeyBytes(in.EphemeralPubkey)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("unable to parse pubkey: %v", err)
|
||||
return nil, fmt.Errorf("error in ephemeral pubkey: %v", err)
|
||||
}
|
||||
if ephemeralPubkey == nil {
|
||||
return nil, fmt.Errorf("must provide ephemeral pubkey")
|
||||
}
|
||||
|
||||
// By default, use the node identity private key.
|
||||
locator := keychain.KeyLocator{
|
||||
Family: keychain.KeyFamilyNodeKey,
|
||||
Index: 0,
|
||||
// Check for backward compatibility. The caller either specifies the old
|
||||
// key_loc field, or the new key_desc field, but not both.
|
||||
if in.KeyDesc != nil && in.KeyLoc != nil {
|
||||
return nil, fmt.Errorf("use either key_desc or key_loc")
|
||||
}
|
||||
if in.KeyLoc != nil {
|
||||
locator.Family = keychain.KeyFamily(in.KeyLoc.KeyFamily)
|
||||
locator.Index = uint32(in.KeyLoc.KeyIndex)
|
||||
|
||||
// When key_desc is used, the key_desc.key_loc is expected as the caller
|
||||
// needs to specify the KeyFamily.
|
||||
if in.KeyDesc != nil && in.KeyDesc.KeyLoc == nil {
|
||||
return nil, fmt.Errorf("when setting key_desc the field " +
|
||||
"key_desc.key_loc must also be set")
|
||||
}
|
||||
|
||||
// We extract two params, rawKeyBytes and keyLoc. Notice their initial
|
||||
// values will be overwritten if not using the deprecated RPC param.
|
||||
var rawKeyBytes []byte
|
||||
keyLoc := in.KeyLoc
|
||||
if in.KeyDesc != nil {
|
||||
keyLoc = in.KeyDesc.GetKeyLoc()
|
||||
rawKeyBytes = in.KeyDesc.GetRawKeyBytes()
|
||||
}
|
||||
|
||||
// When no keyLoc is supplied, defaults to the node's identity private
|
||||
// key.
|
||||
if keyLoc == nil {
|
||||
keyLoc = &KeyLocator{
|
||||
KeyFamily: int32(keychain.KeyFamilyNodeKey),
|
||||
KeyIndex: 0,
|
||||
}
|
||||
}
|
||||
|
||||
// Check the caller is using either the key index or the raw public key
|
||||
// to perform the ECDH, we can't have both.
|
||||
if rawKeyBytes != nil && keyLoc.KeyIndex != 0 {
|
||||
return nil, fmt.Errorf("use either raw_key_bytes or key_index")
|
||||
}
|
||||
|
||||
// Check the raw public key is valid. Notice that if the rawKeyBytes is
|
||||
// empty, the parseRawKeyBytes won't return an error, a nil
|
||||
// *btcec.PublicKey is returned instead.
|
||||
pk, err := parseRawKeyBytes(rawKeyBytes)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("error in raw pubkey: %v", err)
|
||||
}
|
||||
|
||||
// Create a key descriptor. When the KeyIndex is not specified, it uses
|
||||
// the empty value 0, and when the raw public key is not specified, the
|
||||
// pk is nil.
|
||||
keyDescriptor := keychain.KeyDescriptor{
|
||||
KeyLocator: keychain.KeyLocator{
|
||||
Family: keychain.KeyFamily(keyLoc.KeyFamily),
|
||||
Index: uint32(keyLoc.KeyIndex),
|
||||
},
|
||||
PubKey: pk,
|
||||
}
|
||||
|
||||
// Derive the shared key using ECDH and hashing the serialized
|
||||
// compressed shared point.
|
||||
keyDescriptor := keychain.KeyDescriptor{KeyLocator: locator}
|
||||
sharedKeyHash, err := s.cfg.KeyRing.ECDH(keyDescriptor, ephemeralPubkey)
|
||||
if err != nil {
|
||||
err := fmt.Errorf("unable to derive shared key: %v", err)
|
||||
@ -548,3 +576,29 @@ func (s *Server) DeriveSharedKey(_ context.Context, in *SharedKeyRequest) (
|
||||
|
||||
return &SharedKeyResponse{SharedKey: sharedKeyHash[:]}, nil
|
||||
}
|
||||
|
||||
// parseRawKeyBytes checks that the provided raw public key is valid and returns
|
||||
// the public key. A nil public key is returned if the length of the rawKeyBytes
|
||||
// is zero.
|
||||
func parseRawKeyBytes(rawKeyBytes []byte) (*btcec.PublicKey, error) {
|
||||
switch {
|
||||
|
||||
case len(rawKeyBytes) == 33:
|
||||
// If a proper raw key was provided, then we'll attempt
|
||||
// to decode and parse it.
|
||||
return btcec.ParsePubKey(
|
||||
rawKeyBytes, btcec.S256(),
|
||||
)
|
||||
|
||||
case len(rawKeyBytes) == 0:
|
||||
// No key is provided, return nil.
|
||||
return nil, nil
|
||||
|
||||
default:
|
||||
// If the user provided a raw key, but it's of the
|
||||
// wrong length, then we'll return with an error.
|
||||
return nil, fmt.Errorf("pubkey must be " +
|
||||
"serialized in compressed format if " +
|
||||
"specified")
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user