Merge branch '220_sign_contract_info' into 'master'

[c][p][t] Add platform seal on signature metadata



See merge request !72

auth/signature.go

+package auth
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha512"
+	"crypto/x509"
+	"fmt"
+)
+
+// SignStructure signs the provided structure with the private key.
+// The used protocol is RSA PKCS#1 v1.5 with SHA-512 hash.
+// The structure is serialized to a string representation using the fmt package.
+func SignStructure(key *rsa.PrivateKey, structure interface{}) ([]byte, error) {
+	hash, err := hashStruct(structure)
+	if err != nil {
+		return nil, err
+	}
+
+	return rsa.SignPKCS1v15(rand.Reader, key, crypto.SHA512, hash)
+}
+
+// VerifyStructure verifies the signed message according to the provided structure and certificate.
+// See SignStructure for protocol definition.
+func VerifyStructure(cert *x509.Certificate, structure interface{}, signed []byte) (bool, error) {
+	hash, err := hashStruct(structure)
+	if err != nil {
+		return false, err
+	}
+
+	err = rsa.VerifyPKCS1v15(cert.PublicKey.(*rsa.PublicKey), crypto.SHA512, hash, signed)
+	return err == nil, err
+}
+
+func hashStruct(structure interface{}) (hash []byte, err error) {
+	data := []byte(fmt.Sprintf("%v", structure))
+	rawHash := sha512.Sum512(data)
+	hash = rawHash[:]
+	return
+}

auth/signature_test.go

+package auth
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type TestStructure struct {
+	FieldA int64
+	FieldB []byte
+	FieldC *TestStructure
+}
+
+func TestSignStructure(t *testing.T) {
+	key, err := GeneratePrivateKey(1024)
+	assert.Nil(t, err)
+
+	res, err := SignStructure(key, TestStructure{})
+	assert.Nil(t, err)
+	assert.True(t, len(res) > 0)
+}
+
+func TestVerifyStructure(t *testing.T) {
+	key, err := GeneratePrivateKey(1024)
+	assert.Nil(t, err)
+
+	selfSigned, err := GetSelfSignedCertificate(1, 0, "", "", "", "test", key)
+	assert.Nil(t, err)
+	cert, err := PEMToCertificate(selfSigned)
+	assert.Nil(t, err)
+
+	s := TestStructure{
+		FieldA: 5,
+		FieldB: []byte{0x01, 0x02},
+		FieldC: &TestStructure{},
+	}
+
+	res, _ := SignStructure(key, s)
+	valid, err := VerifyStructure(cert, s, res)
+	assert.Nil(t, err)
+	assert.True(t, valid)
+
+	s.FieldB[1] = 0x42
+	valid, _ = VerifyStructure(cert, s, res)
+	assert.False(t, valid)
+}

dfssc/api/client.pb.go

@@ -51,8 +51,8 @@ type Context struct {
 	ContractDocumentHash []byte `protobuf:"bytes,5,opt,name=contractDocumentHash,proto3" json:"contractDocumentHash,omitempty"`
 	// / The unique signature attemp ID, as provided by the platform during the ready signal
 	SignatureUUID string `protobuf:"bytes,6,opt,name=signatureUUID" json:"signatureUUID,omitempty"`
-	// / The signed metadata hashb, as provided by the platform during the ready signal
-	SignedHash []byte `protobuf:"bytes,7,opt,name=signedHash,proto3" json:"signedHash,omitempty"`
+	// / The signed metadata seal, as provided by the platform during the ready signal
+	Seal []byte `protobuf:"bytes,7,opt,name=seal,proto3" json:"seal,omitempty"`
 }
 
 func (m *Context) Reset()                    { *m = Context{} }
@@ -263,28 +263,28 @@ var _Client_serviceDesc = grpc.ServiceDesc{
 
 var fileDescriptor0 = []byte{
 	// 380 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x8c, 0x52, 0x5d, 0x4f, 0xc2, 0x30,
-	0x14, 0xe5, 0x43, 0x18, 0x5c, 0x07, 0x31, 0x0d, 0x0f, 0xcb, 0x8c, 0x06, 0x17, 0x62, 0x88, 0x0f,
-	0x23, 0xc1, 0x9f, 0x00, 0x26, 0x18, 0x63, 0x62, 0xa6, 0xfc, 0x80, 0xda, 0x15, 0x6d, 0x32, 0xd6,
-	0xd9, 0x16, 0x03, 0xbf, 0xc1, 0x37, 0x7f, 0xb1, 0xdd, 0x1d, 0x43, 0x88, 0x3c, 0xf8, 0xb2, 0xec,
-	0xdc, 0x7b, 0x7a, 0xce, 0xbd, 0xa7, 0x85, 0xf3, 0x78, 0xa1, 0xf5, 0x28, 0xff, 0xb0, 0x11, 0xcd,
-	0xc4, 0x88, 0x25, 0x82, 0xa7, 0x26, 0xcc, 0x94, 0x34, 0x92, 0xd4, 0x6d, 0xc5, 0xbf, 0xd8, 0x31,
-	0x32, 0x64, 0x64, 0x09, 0x35, 0x0b, 0xa9, 0x96, 0x05, 0x27, 0xf8, 0xaa, 0x81, 0x33, 0x91, 0xa9,
-	0xe1, 0x6b, 0x43, 0x6e, 0xe0, 0x4c, 0x71, 0x26, 0xb2, 0x5c, 0xe2, 0x81, 0x6f, 0x66, 0x54, 0xbf,
-	0x7b, 0xd5, 0x7e, 0x75, 0xe8, 0x46, 0x7f, 0xea, 0x64, 0x00, 0x1d, 0xcd, 0xd3, 0x98, 0xab, 0x92,
-	0x58, 0x43, 0xe2, 0x61, 0x91, 0xf8, 0xd0, 0xd2, 0xfc, 0x63, 0xc5, 0x53, 0xc6, 0xbd, 0x7a, 0xbf,
-	0x3e, 0xec, 0x44, 0x3b, 0x4c, 0x3c, 0x70, 0xb4, 0x78, 0x4b, 0xb9, 0xd2, 0xde, 0x89, 0x6d, 0xb9,
-	0x51, 0x09, 0xc9, 0x18, 0x7a, 0xcc, 0x8e, 0xa4, 0x28, 0x33, 0x53, 0xc9, 0x56, 0x4b, 0x6b, 0x8b,
-	0x16, 0x0d, 0xb4, 0x38, 0xda, 0xc3, 0x79, 0xec, 0x71, 0x6a, 0x56, 0x8a, 0xcf, 0xe7, 0xf7, 0x53,
-	0xaf, 0x69, 0xc9, 0xed, 0xe8, 0xb0, 0x48, 0x2e, 0x01, 0xd0, 0x24, 0x46, 0x3d, 0x07, 0xf5, 0xf6,
-	0x2a, 0x01, 0x05, 0xe7, 0x49, 0xc9, 0xa5, 0xd0, 0x9c, 0x5c, 0x83, 0xc3, 0x8a, 0x5c, 0x30, 0x83,
-	0xd3, 0xb1, 0x1b, 0xda, 0xf8, 0xc2, 0x6d, 0x56, 0x51, 0xd9, 0x24, 0x3d, 0x68, 0x08, 0xbb, 0xf2,
-	0x1a, 0x03, 0xe8, 0x44, 0x05, 0xc8, 0x97, 0xcb, 0xe8, 0x26, 0x91, 0x34, 0xb6, 0x7b, 0xe7, 0x2e,
-	0x25, 0x0c, 0x1e, 0xa1, 0xfd, 0x5c, 0xce, 0xf4, 0x6f, 0x93, 0x3d, 0xb9, 0xda, 0xa1, 0xdc, 0x15,
-	0x34, 0x66, 0x3c, 0x49, 0x64, 0x4e, 0xf9, 0xb4, 0xe1, 0x09, 0x99, 0xa2, 0x54, 0x3b, 0x2a, 0xe1,
-	0xf8, 0xbb, 0x0a, 0xcd, 0x09, 0xbe, 0x0b, 0x12, 0x82, 0xfb, 0xa2, 0x38, 0x35, 0xe5, 0x92, 0x85,
-	0xdd, 0x16, 0xf9, 0x5d, 0x44, 0x77, 0x4a, 0x49, 0x35, 0x91, 0x31, 0x0f, 0x2a, 0xf6, 0x26, 0xba,
-	0xc8, 0xff, 0x9d, 0xb8, 0xe0, 0xec, 0xf0, 0x91, 0x33, 0x03, 0x68, 0x4d, 0x85, 0x66, 0xd2, 0xda,
-	0x13, 0xc0, 0x2e, 0x0e, 0xe8, 0xef, 0xfd, 0x07, 0x95, 0xd7, 0x26, 0x3e, 0xbf, 0xdb, 0x9f, 0x00,
-	0x00, 0x00, 0xff, 0xff, 0xb4, 0xf1, 0xe7, 0x80, 0xc1, 0x02, 0x00, 0x00,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x8c, 0x52, 0xed, 0xaa, 0xda, 0x40,
+	0x10, 0x35, 0x7e, 0x45, 0xa7, 0x51, 0xca, 0xe2, 0x8f, 0x90, 0x52, 0xb0, 0x41, 0x8a, 0xf4, 0x47,
+	0x04, 0xfb, 0x08, 0x5a, 0xb0, 0x94, 0x42, 0x49, 0xeb, 0x03, 0x6c, 0x37, 0x63, 0xbb, 0x10, 0xb3,
+	0xe9, 0xee, 0x5a, 0xf4, 0x35, 0xee, 0x0b, 0xdf, 0xbb, 0x99, 0x18, 0xaf, 0x72, 0xfd, 0x71, 0xff,
+	0x2c, 0x7b, 0x66, 0xce, 0x9e, 0x33, 0x67, 0x58, 0x78, 0x97, 0xed, 0x8c, 0x59, 0x54, 0x87, 0x58,
+	0xf0, 0x52, 0x2e, 0x44, 0x2e, 0xb1, 0xb0, 0x49, 0xa9, 0x95, 0x55, 0xac, 0xe3, 0x2a, 0xd1, 0xfb,
+	0x0b, 0xa3, 0x24, 0x46, 0x99, 0x73, 0xbb, 0x53, 0x7a, 0x5f, 0x73, 0xe2, 0x47, 0x0f, 0xfc, 0x95,
+	0x2a, 0x2c, 0x1e, 0x2d, 0xfb, 0x04, 0x6f, 0x35, 0x0a, 0x59, 0x56, 0x12, 0xdf, 0xf0, 0xb4, 0xe1,
+	0xe6, 0x6f, 0xe8, 0x4d, 0xbd, 0x79, 0x90, 0xbe, 0xa8, 0xb3, 0x19, 0x8c, 0x0c, 0x16, 0x19, 0xea,
+	0x86, 0xd8, 0x26, 0xe2, 0x6d, 0x91, 0x45, 0x30, 0x30, 0xf8, 0xef, 0x80, 0x85, 0xc0, 0xb0, 0x33,
+	0xed, 0xcc, 0x47, 0xe9, 0x05, 0xb3, 0x10, 0x7c, 0x23, 0xff, 0x14, 0xa8, 0x4d, 0xd8, 0x75, 0xad,
+	0x20, 0x6d, 0x20, 0x5b, 0xc2, 0x44, 0xb8, 0x91, 0x34, 0x17, 0x76, 0xad, 0xc4, 0x61, 0xef, 0x6c,
+	0xc9, 0xa2, 0x47, 0x16, 0x77, 0x7b, 0x34, 0x8f, 0x7b, 0xce, 0xed, 0x41, 0xe3, 0x76, 0xfb, 0x75,
+	0x1d, 0xf6, 0x1d, 0x79, 0x98, 0xde, 0x16, 0x19, 0x83, 0xae, 0x41, 0x9e, 0x87, 0x3e, 0x29, 0xd1,
+	0x3d, 0xe6, 0xe0, 0xff, 0xd0, 0x6a, 0x2f, 0x0d, 0xb2, 0x8f, 0xe0, 0x8b, 0x7a, 0x17, 0x94, 0xfb,
+	0xcd, 0x32, 0x48, 0xdc, 0xca, 0x92, 0xf3, 0x7e, 0xd2, 0xa6, 0xc9, 0x26, 0xd0, 0x93, 0x2e, 0xe6,
+	0x91, 0x42, 0x8f, 0xd2, 0x1a, 0x54, 0x81, 0x4a, 0x7e, 0xca, 0x15, 0xcf, 0x5c, 0xd6, 0x4a, 0xbf,
+	0x81, 0xf1, 0x77, 0x18, 0xfe, 0x6c, 0xe6, 0x78, 0xb5, 0xc9, 0x95, 0x5c, 0xfb, 0x56, 0xee, 0x03,
+	0xf4, 0x36, 0x98, 0xe7, 0xaa, 0xa2, 0xfc, 0x77, 0x0b, 0x93, 0xaa, 0x20, 0xa9, 0x61, 0xda, 0xc0,
+	0xe5, 0x83, 0x07, 0xfd, 0x15, 0xfd, 0x05, 0x96, 0x40, 0xf0, 0x4b, 0x23, 0xb7, 0x4d, 0xc8, 0xda,
+	0xee, 0x8c, 0xa2, 0x31, 0xa1, 0x2f, 0x5a, 0x2b, 0xbd, 0x52, 0x19, 0xc6, 0x2d, 0xb7, 0xfd, 0x31,
+	0xf1, 0x9f, 0x27, 0xae, 0x39, 0x17, 0x7c, 0xe7, 0xcd, 0x0c, 0x06, 0x6b, 0x69, 0x84, 0x72, 0xf6,
+	0x0c, 0xa8, 0x4b, 0x03, 0x46, 0x57, 0xf7, 0xb8, 0xf5, 0xbb, 0x4f, 0x5f, 0xee, 0xf3, 0x53, 0x00,
+	0x00, 0x00, 0xff, 0xff, 0xfe, 0x4f, 0xca, 0xea, 0xb5, 0x02, 0x00, 0x00,
 }

dfssc/api/client.proto

@@ -30,8 +30,8 @@ message Context {
 	bytes contractDocumentHash = 5;
 	/// The unique signature attemp ID, as provided by the platform during the ready signal
 	string signatureUUID = 6;
-	/// The signed metadata hashb, as provided by the platform during the ready signal
-	bytes signedHash = 7;
+	/// The signed metadata seal, as provided by the platform during the ready signal
+	bytes seal = 7;
 }
 
 message Promise {

dfssc/sign/promises.go

@@ -21,6 +21,7 @@ func (m *SignatureManager) createContext(from, to uint32) (*cAPI.Context, error)
 		Signers:              m.keyHash,
 		ContractDocumentHash: []byte(m.contract.File.Hash),
 		SignatureUUID:        m.uuid,
+		Seal:                 m.seal,
 	}, nil
 }
 

dfssc/sign/starter.go

@@ -42,6 +42,7 @@ type SignatureManager struct {
 	keyHash      [][]byte
 	mail         string
 	archives     *Archives
+	seal         []byte
 
 	// Callbacks
 	OnSignerStatusUpdate func(mail string, status SignerStatus, data string)
@@ -215,6 +216,7 @@ func (m *SignatureManager) SendReadySign() (signatureUUID string, err error) {
 	m.sequence = launch.Sequence
 	m.uuid = launch.SignatureUuid
 	m.keyHash = launch.KeyHash
+	m.seal = launch.Seal
 	signatureUUID = m.uuid
 	return
 }

dfssp/api/platform.pb.go

@@ -261,12 +261,16 @@ type LaunchSignature struct {
 	ErrorCode *ErrorCode `protobuf:"bytes,1,opt,name=errorCode" json:"errorCode,omitempty"`
 	// / The unique signature generated by the platform for this specific signature attempt
 	SignatureUuid string `protobuf:"bytes,2,opt,name=signatureUuid" json:"signatureUuid,omitempty"`
+	// / The SHA-512 hash of the contract document
+	DocumentHash []byte `protobuf:"bytes,3,opt,name=documentHash,proto3" json:"documentHash,omitempty"`
 	// / A confirmation of client hashes for communication authentication
-	KeyHash [][]byte `protobuf:"bytes,3,rep,name=keyHash,proto3" json:"keyHash,omitempty"`
+	KeyHash [][]byte `protobuf:"bytes,4,rep,name=keyHash,proto3" json:"keyHash,omitempty"`
 	// / The signing sequence generated on-the-fly by the platform
-	Sequence []uint32 `protobuf:"varint,4,rep,name=sequence" json:"sequence,omitempty"`
-	// / The cryptographic object of the signature of this structure (hash excepted) by the platform, for data certification.
-	Hash []byte `protobuf:"bytes,5,opt,name=hash,proto3" json:"hash,omitempty"`
+	Sequence []uint32 `protobuf:"varint,5,rep,name=sequence" json:"sequence,omitempty"`
+	// / The cryptographic object of the signature of this structure (seal and errorCode excepted) by the platform, for data certification.
+	// / The signature is computed using auth.SignStructure function:
+	// / PKCS1v15 + SHA512 hash of the string representation of the structure
+	Seal []byte `protobuf:"bytes,6,opt,name=seal,proto3" json:"seal,omitempty"`
 }
 
 func (m *LaunchSignature) Reset()                    { *m = LaunchSignature{} }
@@ -616,50 +620,51 @@ var _Platform_serviceDesc = grpc.ServiceDesc{
 }
 
 var fileDescriptor0 = []byte{
-	// 706 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x94, 0x55, 0x5f, 0x6f, 0x12, 0x4b,
-	0x14, 0x67, 0x81, 0x16, 0x38, 0x14, 0xba, 0x19, 0x7a, 0xef, 0xe5, 0x92, 0xd4, 0x34, 0x13, 0x13,
-	0x1b, 0x63, 0xa0, 0xc1, 0x44, 0xa3, 0x6f, 0x14, 0x49, 0x5b, 0x53, 0xb1, 0x19, 0x40, 0x13, 0xdf,
-	0xd6, 0xdd, 0x69, 0x59, 0xcb, 0xfe, 0x71, 0x66, 0x88, 0xe9, 0x9b, 0x1f, 0xc1, 0x6f, 0xe2, 0x8b,
-	0x9f, 0x4f, 0x9d, 0x99, 0xdd, 0x59, 0x16, 0x24, 0x26, 0xe5, 0x61, 0x99, 0x73, 0xe6, 0xcc, 0xef,
-	0x9c, 0xf3, 0x9b, 0xf3, 0xdb, 0x85, 0x43, 0xef, 0x9a, 0xf3, 0x9e, 0x7a, 0xc4, 0x3d, 0x27, 0xf6,
-	0x7b, 0xf1, 0xc2, 0x11, 0xd7, 0x11, 0x0b, 0xba, 0x31, 0x8b, 0x44, 0x84, 0x4a, 0xd2, 0x87, 0x07,
-	0xb0, 0x4f, 0xe8, 0x8d, 0xcf, 0x05, 0x65, 0x84, 0x7e, 0x5e, 0x52, 0x2e, 0xd0, 0x01, 0xec, 0xd0,
-	0xc0, 0xf1, 0x17, 0x6d, 0xeb, 0xc8, 0x3a, 0xae, 0x91, 0xc4, 0x40, 0x6d, 0xa8, 0xb0, 0x24, 0xa0,
-	0x5d, 0xd4, 0x7e, 0x63, 0xe2, 0x1f, 0x16, 0xd4, 0x46, 0x8c, 0x45, 0x6c, 0x18, 0x79, 0x14, 0x3d,
-	0x82, 0xb2, 0x2b, 0xff, 0xf5, 0xe1, 0x66, 0xbf, 0xd5, 0x95, 0x49, 0xba, 0xd9, 0x6e, 0x57, 0x3d,
-	0x88, 0x0e, 0x50, 0x80, 0x01, 0xe5, 0xdc, 0xb9, 0xa1, 0x06, 0x30, 0x35, 0xb1, 0x07, 0x65, 0x0d,
-	0x55, 0x87, 0xca, 0x64, 0x36, 0x1c, 0x8e, 0x26, 0x13, 0xbb, 0x80, 0x00, 0x76, 0x2f, 0xc6, 0xef,
-	0x06, 0xe4, 0xcc, 0xb6, 0xd4, 0xc6, 0xe9, 0xe0, 0xd5, 0x60, 0x36, 0x3d, 0xb7, 0x8b, 0xca, 0x78,
-	0x3f, 0x20, 0xe3, 0x8b, 0xf1, 0x99, 0x5d, 0x42, 0x2d, 0x15, 0x35, 0x1d, 0x11, 0x62, 0xff, 0x32,
-	0x3f, 0x4b, 0x36, 0x54, 0x99, 0x5e, 0xbc, 0x19, 0xbd, 0x9d, 0x4d, 0xed, 0x9f, 0x99, 0x17, 0xbf,
-	0x80, 0xfa, 0x60, 0x29, 0xe6, 0x7f, 0xef, 0x5a, 0x7a, 0x45, 0x74, 0x4b, 0xc3, 0xb4, 0xc4, 0xc4,
-	0xc0, 0x27, 0xd0, 0x34, 0xa4, 0x51, 0x6f, 0xc6, 0x29, 0x43, 0x0f, 0x00, 0xdc, 0x85, 0x4f, 0x43,
-	0x31, 0xa4, 0x4c, 0xa4, 0x10, 0x39, 0x0f, 0xae, 0xc0, 0xce, 0x28, 0x88, 0xc5, 0x1d, 0xfe, 0x02,
-	0xad, 0xab, 0x88, 0x8b, 0x61, 0x14, 0x0a, 0xe6, 0xb8, 0xc2, 0x64, 0x47, 0x50, 0x9e, 0x3b, 0x7c,
-	0xae, 0x4f, 0xee, 0x11, 0xbd, 0x46, 0x1d, 0xa8, 0x5e, 0xfb, 0x0b, 0x1a, 0x3a, 0x81, 0x61, 0x28,
-	0xb3, 0xd1, 0xbf, 0xb0, 0xcb, 0xfd, 0x9b, 0x90, 0xb2, 0x76, 0xe9, 0xa8, 0x24, 0x77, 0x52, 0x4b,
-	0x91, 0xea, 0x46, 0x41, 0x20, 0xd3, 0xb6, 0xcb, 0x09, 0xa9, 0xa9, 0x89, 0x8f, 0x01, 0x9d, 0xd1,
-	0x6d, 0x79, 0x97, 0x4b, 0xdf, 0x4b, 0x2b, 0xd6, 0x6b, 0x7c, 0x09, 0x55, 0x13, 0x86, 0x9e, 0x40,
-	0x8d, 0x9a, 0xcb, 0xd3, 0x41, 0xf5, 0x7e, 0x73, 0xfd, 0x4a, 0xc9, 0x2a, 0x40, 0xa1, 0x7d, 0xe2,
-	0x51, 0x42, 0x96, 0xec, 0x42, 0xad, 0xf1, 0x18, 0x0e, 0x5e, 0x47, 0x7e, 0x38, 0x91, 0xf5, 0x39,
-	0x62, 0xc9, 0xa8, 0xc9, 0x8c, 0x61, 0xcf, 0x4d, 0xb3, 0xcc, 0x56, 0x15, 0xac, 0xf9, 0x14, 0x5e,
-	0x1c, 0xb1, 0x64, 0xe0, 0x1a, 0x44, 0xaf, 0xf1, 0x57, 0x0b, 0x1a, 0x8a, 0x72, 0x59, 0x62, 0x48,
-	0x5d, 0x41, 0xbd, 0x7b, 0xd6, 0xb8, 0x99, 0xb7, 0xb8, 0x25, 0xef, 0xa1, 0x64, 0x85, 0x6b, 0x6e,
-	0x15, 0x58, 0x4d, 0x83, 0xa9, 0x9c, 0x44, 0xbb, 0xf1, 0x07, 0x28, 0xeb, 0x4b, 0x97, 0x64, 0xdf,
-	0xd2, 0xbb, 0xf3, 0xd5, 0xbd, 0x19, 0x73, 0x35, 0x4c, 0xc5, 0xfc, 0x30, 0x35, 0xa1, 0xe8, 0xc7,
-	0x1a, 0xb4, 0x46, 0xe4, 0x2a, 0x6b, 0xaf, 0x9c, 0x6b, 0xef, 0x19, 0xd8, 0x84, 0x3a, 0xde, 0x9d,
-	0xe2, 0xeb, 0x1e, 0x54, 0xe1, 0xef, 0x16, 0xec, 0x5f, 0x3a, 0xcb, 0xd0, 0x9d, 0x67, 0x4c, 0xdf,
-	0x93, 0x98, 0x87, 0xd0, 0xe0, 0xe6, 0x68, 0x8e, 0x99, 0x75, 0x67, 0xbe, 0x67, 0x35, 0x79, 0xb9,
-	0x9e, 0xe5, 0xb8, 0x72, 0x55, 0x70, 0xe8, 0x52, 0xd9, 0x51, 0x49, 0x76, 0x94, 0xd9, 0xd9, 0x78,
-	0xef, 0xac, 0xc6, 0xbb, 0xff, 0xad, 0x04, 0xd5, 0xab, 0xf4, 0x8d, 0x84, 0xfa, 0x50, 0x35, 0x8a,
-	0x42, 0x07, 0xba, 0xc6, 0x8d, 0xb7, 0x52, 0x67, 0xa3, 0x72, 0x5c, 0x40, 0x3d, 0x28, 0x2b, 0x01,
-	0x23, 0x5b, 0xef, 0xe4, 0xb4, 0xdc, 0x69, 0xad, 0x21, 0x24, 0x12, 0x95, 0x07, 0x1e, 0x03, 0xcc,
-	0x42, 0x66, 0xd2, 0x40, 0x02, 0xa8, 0x54, 0xb9, 0x05, 0xfc, 0x25, 0xec, 0xe5, 0x75, 0x8a, 0xda,
-	0x3a, 0x62, 0x8b, 0x74, 0xb7, 0x9c, 0x7d, 0x0e, 0xf5, 0x9c, 0xd4, 0xd0, 0x7f, 0x3a, 0xe0, 0x4f,
-	0xf1, 0x75, 0x1a, 0x7a, 0xc3, 0x78, 0xe5, 0xc1, 0x53, 0x68, 0xac, 0x69, 0x05, 0xfd, 0xaf, 0x23,
-	0xb6, 0xe9, 0xa7, 0x83, 0xb2, 0xa9, 0xcc, 0x94, 0x80, 0x0b, 0x27, 0x96, 0x2c, 0xbc, 0x96, 0x0d,
-	0x10, 0xfa, 0x27, 0x25, 0x62, 0x7d, 0xa0, 0x3a, 0x09, 0xc3, 0x1b, 0xe3, 0x82, 0x0b, 0x1f, 0x77,
-	0xf5, 0x87, 0xe1, 0xe9, 0xef, 0x00, 0x00, 0x00, 0xff, 0xff, 0xc5, 0x4c, 0xa0, 0x21, 0x39, 0x06,
-	0x00, 0x00,
+	// 723 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x94, 0x55, 0xef, 0x6e, 0xd3, 0x30,
+	0x10, 0x6f, 0xda, 0xac, 0x7f, 0xae, 0x6b, 0x17, 0xb9, 0x03, 0x42, 0xa5, 0xa1, 0xc9, 0x42, 0x62,
+	0x42, 0xa8, 0x9d, 0x8a, 0x04, 0x82, 0x6f, 0x5d, 0xa9, 0xb6, 0xa1, 0x51, 0x26, 0xb7, 0x05, 0x89,
+	0x6f, 0x21, 0xf1, 0xd6, 0xb0, 0x36, 0x29, 0xb1, 0x2b, 0xb4, 0x6f, 0x3c, 0x02, 0x0f, 0xc3, 0x9b,
+	0xf0, 0x3e, 0x80, 0xed, 0xc4, 0x69, 0x52, 0x2a, 0xa4, 0xf5, 0x43, 0xea, 0x3b, 0x9f, 0x7f, 0x77,
+	0xf7, 0xf3, 0xfd, 0x12, 0x38, 0xf0, 0xae, 0x18, 0xeb, 0xca, 0xc7, 0xb2, 0xeb, 0x2c, 0xfd, 0xee,
+	0x72, 0xee, 0xf0, 0xab, 0x30, 0x5a, 0x74, 0x96, 0x51, 0xc8, 0x43, 0x54, 0x12, 0x3e, 0xdc, 0x87,
+	0x3d, 0x42, 0xaf, 0x7d, 0xc6, 0x69, 0x44, 0xe8, 0xd7, 0x15, 0x65, 0x1c, 0xed, 0xc3, 0x0e, 0x5d,
+	0x38, 0xfe, 0xdc, 0x36, 0x0e, 0x8d, 0xa3, 0x1a, 0x89, 0x0d, 0x64, 0x43, 0x25, 0x8a, 0x03, 0xec,
+	0xa2, 0xf2, 0x6b, 0x13, 0xff, 0x34, 0xa0, 0x36, 0x8c, 0xa2, 0x30, 0x1a, 0x84, 0x1e, 0x45, 0x4f,
+	0xc0, 0x74, 0xc5, 0xbf, 0x3a, 0xdc, 0xec, 0xb5, 0x3a, 0x22, 0x49, 0x27, 0xdd, 0xed, 0xc8, 0x07,
+	0x51, 0x01, 0x12, 0x70, 0x41, 0x19, 0x73, 0xae, 0xa9, 0x06, 0x4c, 0x4c, 0xec, 0x81, 0xa9, 0xa0,
+	0xea, 0x50, 0x19, 0x4f, 0x07, 0x83, 0xe1, 0x78, 0x6c, 0x15, 0x10, 0x40, 0xf9, 0x7c, 0xf4, 0xa1,
+	0x4f, 0x4e, 0x2d, 0x43, 0x6e, 0x9c, 0xf4, 0xdf, 0xf4, 0xa7, 0x93, 0x33, 0xab, 0x28, 0x8d, 0x8f,
+	0x7d, 0x32, 0x3a, 0x1f, 0x9d, 0x5a, 0x25, 0xd4, 0x92, 0x51, 0x93, 0x21, 0x21, 0xd6, 0x1f, 0xfd,
+	0x33, 0x44, 0x43, 0x95, 0xc9, 0xf9, 0xbb, 0xe1, 0xfb, 0xe9, 0xc4, 0xfa, 0x9d, 0x7a, 0xf1, 0x2b,
+	0xa8, 0xf7, 0x57, 0x7c, 0xf6, 0xff, 0xae, 0x85, 0x97, 0x87, 0x37, 0x34, 0x48, 0x4a, 0x8c, 0x0d,
+	0x7c, 0x0c, 0x4d, 0x4d, 0x1a, 0xf5, 0xa6, 0x8c, 0x46, 0xe8, 0x11, 0x80, 0x3b, 0xf7, 0x69, 0xc0,
+	0x07, 0x34, 0xe2, 0x09, 0x44, 0xc6, 0x83, 0x2b, 0xb0, 0x33, 0x5c, 0x2c, 0xf9, 0x2d, 0xfe, 0x06,
+	0xad, 0xcb, 0x90, 0xf1, 0x41, 0x18, 0xf0, 0xc8, 0x71, 0xb9, 0xce, 0x8e, 0xc0, 0x9c, 0x39, 0x6c,
+	0xa6, 0x4e, 0xee, 0x12, 0xb5, 0x46, 0x6d, 0xa8, 0x5e, 0xf9, 0x73, 0x1a, 0x38, 0x0b, 0xcd, 0x50,
+	0x6a, 0xa3, 0xfb, 0x50, 0x66, 0xfe, 0x75, 0x40, 0x23, 0xbb, 0x74, 0x58, 0x12, 0x3b, 0x89, 0x25,
+	0x49, 0x75, 0xc3, 0xc5, 0x42, 0xa4, 0xb5, 0xcd, 0x98, 0xd4, 0xc4, 0xc4, 0x47, 0x80, 0x4e, 0xe9,
+	0xb6, 0xbc, 0xab, 0x95, 0xef, 0x25, 0x15, 0xab, 0x35, 0xbe, 0x80, 0xaa, 0x0e, 0x43, 0xcf, 0xa0,
+	0x46, 0xf5, 0xe5, 0xa9, 0xa0, 0x7a, 0xaf, 0x99, 0xbf, 0x52, 0xb2, 0x0e, 0x90, 0x68, 0x5f, 0x58,
+	0x18, 0x93, 0x25, 0xba, 0x90, 0x6b, 0x3c, 0x82, 0xfd, 0xb7, 0xa1, 0x1f, 0x8c, 0x45, 0x7d, 0x0e,
+	0x5f, 0x45, 0x54, 0x67, 0xc6, 0xb0, 0xeb, 0x26, 0x59, 0xa6, 0xeb, 0x0a, 0x72, 0x3e, 0x89, 0xb7,
+	0x0c, 0xa3, 0x78, 0xe0, 0x1a, 0x44, 0xad, 0xf1, 0x77, 0x03, 0x1a, 0x92, 0x72, 0x51, 0x62, 0x40,
+	0x5d, 0x4e, 0xbd, 0x3b, 0xd6, 0xb8, 0x99, 0xb7, 0xb8, 0x25, 0xef, 0x81, 0x60, 0x85, 0x29, 0x6e,
+	0x25, 0x58, 0x4d, 0x81, 0xc9, 0x9c, 0x44, 0xb9, 0xf1, 0x27, 0x30, 0xd5, 0xa5, 0x0b, 0xb2, 0x6f,
+	0xe8, 0xed, 0xd9, 0xfa, 0xde, 0xb4, 0xb9, 0x1e, 0xa6, 0x62, 0x76, 0x98, 0x9a, 0x50, 0xf4, 0x97,
+	0x0a, 0xb4, 0x46, 0xc4, 0x2a, 0x6d, 0xcf, 0xcc, 0xb4, 0xf7, 0x02, 0x2c, 0x42, 0x1d, 0xef, 0x56,
+	0xf2, 0x75, 0x07, 0xaa, 0xf0, 0x2f, 0x03, 0xf6, 0x2e, 0x9c, 0x55, 0xe0, 0xce, 0x52, 0xa6, 0xef,
+	0x48, 0xcc, 0x63, 0x68, 0x30, 0x7d, 0x34, 0xc3, 0x4c, 0xde, 0x29, 0x6b, 0xf1, 0x42, 0x77, 0x25,
+	0x47, 0x4a, 0x35, 0x5e, 0x52, 0x8d, 0xe7, 0x7c, 0x59, 0x5e, 0x4c, 0x31, 0x9d, 0x19, 0x5e, 0xc4,
+	0x48, 0x33, 0xd9, 0x54, 0xe0, 0x52, 0x7b, 0x47, 0x6c, 0x35, 0x48, 0x6a, 0x4b, 0x36, 0x18, 0x75,
+	0xe6, 0x76, 0x39, 0x1e, 0x1e, 0xb9, 0xee, 0xfd, 0x28, 0x41, 0xf5, 0x32, 0x79, 0x6b, 0xa1, 0x1e,
+	0x54, 0xb5, 0xea, 0xd0, 0xbe, 0xea, 0x63, 0xe3, 0xcd, 0xd5, 0xde, 0xe8, 0x0e, 0x17, 0x50, 0x17,
+	0x4c, 0x29, 0x72, 0x64, 0xa9, 0x9d, 0x8c, 0xde, 0xdb, 0xad, 0x1c, 0x42, 0x2c, 0x63, 0x71, 0xe0,
+	0x29, 0xc0, 0x34, 0x88, 0x74, 0x1a, 0x88, 0x01, 0xa5, 0x72, 0xb7, 0x80, 0xbf, 0x86, 0xdd, 0xac,
+	0x96, 0x91, 0xad, 0x22, 0xb6, 0xc8, 0x7b, 0xcb, 0xd9, 0x97, 0x50, 0xcf, 0xc8, 0x11, 0x3d, 0x50,
+	0x01, 0xff, 0x0a, 0xb4, 0xdd, 0x50, 0x1b, 0xda, 0x2b, 0x0e, 0x9e, 0x40, 0x23, 0xa7, 0x27, 0xf4,
+	0x50, 0x45, 0x6c, 0xd3, 0x58, 0x1b, 0xa5, 0x93, 0x9b, 0xaa, 0x05, 0x17, 0x8e, 0x0d, 0x51, 0x78,
+	0x2d, 0x1d, 0x32, 0x74, 0x2f, 0x21, 0x22, 0x3f, 0x74, 0xed, 0x98, 0xe1, 0x8d, 0x91, 0xc2, 0x85,
+	0xcf, 0x65, 0xf5, 0xf1, 0x78, 0xfe, 0x37, 0x00, 0x00, 0xff, 0xff, 0xdb, 0xb0, 0xef, 0x13, 0x5d,
+	0x06, 0x00, 0x00,
 }

dfssp/api/platform.proto

@@ -136,10 +136,14 @@ message LaunchSignature {
 	ErrorCode errorCode = 1;
 	/// The unique signature generated by the platform for this specific signature attempt
 	string signatureUuid = 2;
+	/// The SHA-512 hash of the contract document
+	bytes documentHash = 3;
 	/// A confirmation of client hashes for communication authentication
-	repeated bytes keyHash = 3;
+	repeated bytes keyHash = 4;
 	/// The signing sequence generated on-the-fly by the platform
-	repeated uint32 sequence = 4;
-	/// The cryptographic object of the signature of this structure (hash excepted) by the platform, for data certification.
-	bytes hash = 5;
+	repeated uint32 sequence = 5;
+	/// The cryptographic object of the signature of this structure (seal and errorCode excepted) by the platform, for data certification.
+	/// The signature is computed using auth.SignStructure function:
+	/// PKCS1v15 + SHA512 hash of the string representation of the structure
+	bytes seal = 6;
 }

dfssp/contract/ready.go

@@ -14,10 +14,11 @@ import (
 
 // readySignal is the structure that is transmitted accross goroutines
 type readySignal struct {
-	ready    bool     // If true, this is the ready signal. If not, this is a new connection signal
-	data     string   // Various data (CN or SignatureUUID)
-	chain    [][]byte // Only used to broadcast hash chain (signers hashes in order)
-	sequence []uint32 // Only used to broadcast signature sequence
+	ready        bool     // If true, this is the ready signal. If not, this is a new connection signal
+	data         string   // Various data (CN or SignatureUUID)
+	documentHash []byte   // Contract document SHA-512 hash
+	chain        [][]byte // Only used to broadcast hash chain (signers hashes in order)
+	sequence     []uint32 // Only used to broadcast signature sequence
 }
 
 // ReadySign is the last job of the platform before the signature can occur.
@@ -56,6 +57,7 @@ func ReadySign(db *mgdb.MongoManager, rooms *common.WaitingGroupMap, ctx *contex
 					return &api.LaunchSignature{
 						ErrorCode:     &api.ErrorCode{Code: api.ErrorCode_SUCCESS},
 						SignatureUuid: s.data,
+						DocumentHash:  s.documentHash,
 						KeyHash:       s.chain,
 						Sequence:      s.sequence,
 					}
@@ -110,10 +112,11 @@ func masterReadyRoutine(db *mgdb.MongoManager, rooms *common.WaitingGroupMap, co
 			ready := FindAndUpdatePendingSigner(cn, &signersReady, &contract.Signers)
 			if ready {
 				rooms.Broadcast(roomID, &readySignal{
-					ready:    true,
-					data:     bson.NewObjectId().Hex(),
-					chain:    contract.GetHashChain(),
-					sequence: GenerateSignSequence(len(contract.Signers)),
+					ready:        true,
+					data:         bson.NewObjectId().Hex(),
+					documentHash: contract.File.Hash,
+					chain:        contract.GetHashChain(),
+					sequence:     GenerateSignSequence(len(contract.Signers)),
 				})
 				work = false
 			}

dfssp/server/server.go

@@ -5,8 +5,7 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/spf13/viper"
-
+	"dfss/auth"
 	"dfss/dfssp/api"
 	"dfss/dfssp/authority"
 	"dfss/dfssp/common"
@@ -14,7 +13,7 @@ import (
 	"dfss/dfssp/user"
 	"dfss/mgdb"
 	"dfss/net"
-
+	"github.com/spf13/viper"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
@@ -96,7 +95,20 @@ func (s *platformServer) ReadySign(ctx context.Context, in *api.ReadySignRequest
 	if len(cn) == 0 {
 		return &api.LaunchSignature{ErrorCode: &api.ErrorCode{Code: api.ErrorCode_BADAUTH}}, nil
 	}
-	return contract.ReadySign(s.DB, s.Rooms, &ctx, in), nil
+
+	signal := contract.ReadySign(s.DB, s.Rooms, &ctx, in)
+	if signal.ErrorCode.Code == api.ErrorCode_SUCCESS {
+		sealedSignal := *signal
+		sealedSignal.ErrorCode = nil
+		sealedSignal.Seal = nil
+		var err error
+		signal.Seal, err = auth.SignStructure(s.Pid.Pkey, sealedSignal)
+		if err != nil {
+			return &api.LaunchSignature{ErrorCode: &api.ErrorCode{Code: api.ErrorCode_INTERR}}, nil
+		}
+	}
+
+	return signal, nil
 }
 
 // GetServer returns the GRPC server associated with the platform

dfsst/entities/archivesManager.go

@@ -29,7 +29,7 @@ func (manager *ArchivesManager) InitializeArchives(promise *cAPI.Promise, signat
 	present, archives := manager.ContainsSignature(signatureUUID)
 
 	if !present {
-		archives = NewSignatureArchives(signatureUUID, promise.Context.Sequence, *signers, promise.Context.ContractDocumentHash, promise.Context.SignedHash)
+		archives = NewSignatureArchives(signatureUUID, promise.Context.Sequence, *signers, promise.Context.ContractDocumentHash, promise.Context.Seal)
 	}
 
 	manager.Archives = archives

dfsst/entities/archivesManager_test.go

@@ -23,7 +23,7 @@ var (
 	signatureUUID        string
 	signatureUUIDBson    bson.ObjectId
 
-	signedHash []byte
+	seal []byte
 
 	signersEntities []Signer
 
@@ -48,7 +48,7 @@ func init() {
 	signatureUUIDBson = bson.NewObjectId()
 	signatureUUID = signatureUUIDBson.Hex()
 
-	signedHash = []byte{}
+	seal = []byte{}
 
 	signersEntities = make([]Signer, 0)
 	for _, s := range signers {
@@ -85,15 +85,15 @@ func TestInitializeArchives(t *testing.T) {
 			Sequence:             sequence,
 			Signers:              signers,
 			SignatureUUID:        signatureUUID,
-			SignedHash:           signedHash,
+			Seal:                 seal,
 		},
 	}
-	archives := NewSignatureArchives(signatureUUIDBson, sequence, signersEntities, contractDocumentHash, signedHash)
+	archives := NewSignatureArchives(signatureUUIDBson, sequence, signersEntities, contractDocumentHash, seal)
 	manager := &ArchivesManager{
 		DB:       dbManager,
 		Archives: archives,
 	}
-	arch := NewSignatureArchives(signatureUUIDBson, sequence, signersEntities, contractDocumentHash, signedHash)
+	arch := NewSignatureArchives(signatureUUIDBson, sequence, signersEntities, contractDocumentHash, seal)
 
 	manager.InitializeArchives(promise, signatureUUIDBson, &signersEntities)
 	arch.Signers = manager.Archives.Signers
@@ -114,7 +114,7 @@ func TestInitializeArchives(t *testing.T) {
 }