Changes for logs:

- Extract raw information from session, and only derive for display
- Add protocol version and ABS timestamps in log entries. Include an update function for existing logs
- AttributeValue of AttributeResult is now a TranslatedString
- Removed polymorphic 'response' from log entry; populate either IssueCommitment or Prooflist instead
- Greatly simplified marshalling log entries by not using a separate struct
- Added tests for disclosure logging
Co-authored-by: Sietse Ringers <mail@sietseringers.net>

attributes.go

@@ -21,7 +21,7 @@ const (
 )
 
 type AttributeResult struct {
-	AttributeValue       string                  `json:"value"` // Value of the disclosed attribute
+	AttributeValue       TranslatedString        `json:"value"` // Value of the disclosed attribute
 	AttributeId          AttributeTypeIdentifier `json:"id"`
 	AttributeProofStatus AttributeProofStatus    `json:"status"`
 }
@@ -105,12 +105,20 @@ func (al *AttributeList) Strings() []TranslatedString {
 			if val == nil {
 				continue
 			}
-			al.strings[i] = map[string]string{"en": *val, "nl": *val} // TODO
+			al.strings[i] = translateAttribute(val)
 		}
 	}
 	return al.strings
 }
 
+// Localize raw attribute values (to be implemented)
+func translateAttribute(attr *string) TranslatedString {
+	if attr == nil {
+		return nil
+	}
+	return map[string]string{"en": *attr, "nl": *attr}
+}
+
 func (al *AttributeList) decode(i int) *string {
 	attr := al.Ints[i+1]
 	metadataVersion := al.MetadataAttribute.Version()
@@ -340,7 +348,7 @@ type AttributeDisjunction struct {
 type DisclosedAttributeDisjunction struct {
 	AttributeDisjunction
 
-	DisclosedValue string
+	DisclosedValue TranslatedString
 	DisclosedId    AttributeTypeIdentifier
 	ProofStatus    AttributeProofStatus
 }
@@ -464,7 +472,7 @@ func (disclosedAttributeDisjunction *DisclosedAttributeDisjunction) MarshalJSON(
 		Label      string                    `json:"label"`
 		Attributes []AttributeTypeIdentifier `json:"attributes"`
 
-		DisclosedValue string                  `json:"disclosedValue"`
+		DisclosedValue TranslatedString        `json:"disclosedValue"`
 		DisclosedId    AttributeTypeIdentifier `json:"disclosedId"`
 		ProofStatus    AttributeProofStatus    `json:"proofStatus"`
 	}{

identifiers.go

@@ -144,12 +144,11 @@ func (id IssuerIdentifier) MarshalText() ([]byte, error) {
 	return []byte(id.String()), nil
 }
 
-// TODO enable this when updating protocol
-//// UnmarshalText implements encoding.TextUnmarshaler.
-//func (id *IssuerIdentifier) UnmarshalText(text []byte) error {
-//	*id = NewIssuerIdentifier(string(text))
-//	return nil
-//}
+// UnmarshalText implements encoding.TextUnmarshaler.
+func (id *IssuerIdentifier) UnmarshalText(text []byte) error {
+	*id = NewIssuerIdentifier(string(text))
+	return nil
+}
 
 // MarshalText implements encoding.TextMarshaler.
 func (id CredentialTypeIdentifier) MarshalText() ([]byte, error) {

irmaclient/client.go

@@ -630,7 +630,7 @@ func (client *Client) ConstructCredentials(msg []*gabi.IssueSignatureMessage, re
 	// we save none of them to fail the session cleanly
 	gabicreds := []*gabi.Credential{}
 	for i, sig := range msg {
-		attrs, err := request.Credentials[i].AttributeList(client.Configuration, getMetadataVersion(request.GetVersion()))
+		attrs, err := request.Credentials[i].AttributeList(client.Configuration, irma.GetMetadataVersion(request.GetVersion()))
 		if err != nil {
 			return err
 		}

irmaclient/irmaclient_test.go

@@ -189,12 +189,28 @@ func TestLogging(t *testing.T) {
 	require.NoError(t, err)
 	require.Equal(t, "testip", sessionjwt.(*irma.IdentityProviderJwt).ServerName)
 	require.NoError(t, err)
-	require.NotEmpty(t, entry.Disclosed)
-	require.NotEmpty(t, entry.Received)
-	response, err := entry.GetResponse()
+	require.NotNil(t, entry.IssueCommitment)
+	disclosed, err := entry.GetDisclosedCredentials(client.Configuration)
 	require.NoError(t, err)
-	require.NotNil(t, response)
-	require.IsType(t, &gabi.IssueCommitmentMessage{}, response)
+	require.NotEmpty(t, disclosed)
+
+	jwt = getDisclosureJwt("testsp", irma.NewAttributeTypeIdentifier("irma-demo.RU.studentCard.studentID"))
+	sessionHelper(t, jwt, "verification", client)
+	logs, err = client.Logs()
+	require.NoError(t, err)
+	require.True(t, len(logs) == oldLogLength+2)
+
+	entry = logs[len(logs)-1]
+	require.NotNil(t, entry)
+	sessionjwt, err = entry.Jwt()
+	require.NoError(t, err)
+	require.Equal(t, "testsp", sessionjwt.(*irma.ServiceProviderJwt).ServerName)
+	require.NoError(t, err)
+	require.NotNil(t, entry.ProofList)
+
+	disclosed, err = entry.GetDisclosedCredentials(client.Configuration)
+	require.NoError(t, err)
+	require.NotEmpty(t, disclosed)
 
 	test.ClearTestStorage(t)
 }

irmaclient/legacy.go

@@ -2,19 +2,10 @@ package irmaclient
 
 import (
 	"encoding/json"
-	"math/big"
 
 	"github.com/mhe/gabi"
 )
 
-// TODO remove on protocol upgrade
-type logSessionInfo struct {
-	Jwt     string         `json:"jwt"`
-	Nonce   *big.Int       `json:"nonce"`
-	Context *big.Int       `json:"context"`
-	Keys    map[string]int `json:"keys"`
-}
-
 func (pki *publicKeyIdentifier) MarshalJSON() ([]byte, error) {
 	temp := struct {
 		Issuer  map[string]string `json:"issuer"`

irmaclient/logs.go

 package irmaclient
 
 import (
-	"encoding/json"
 	"time"
 
+	"github.com/bwesterb/go-atum"
 	"github.com/go-errors/errors"
 	"github.com/mhe/gabi"
 	"github.com/privacybydesign/irmago"
 )
 
+// LogSessionInfo is a SessionInfo alias to bypass the custom JSON marshaler
+type LogSessionInfo irma.SessionInfo
+
 // LogEntry is a log entry of a past event.
 type LogEntry struct {
 	// General info
 	Type        irma.Action
-	Time        irma.Timestamp    // Time at which the session was completed
-	SessionInfo *irma.SessionInfo // Message that started the session
+	Time        irma.Timestamp        // Time at which the session was completed
+	SessionInfo *LogSessionInfo       `json:",omitempty"` // Message that started the session
+	Version     *irma.ProtocolVersion `json:",omitempty"` // Protocol version that was used in the session
 
 	// Session type-specific info
-	Disclosed     map[irma.CredentialTypeIdentifier]map[int]irma.TranslatedString // Any session type
-	Received      map[irma.CredentialTypeIdentifier][]irma.TranslatedString       // In case of issuance session
-	Removed       map[irma.CredentialTypeIdentifier][]irma.TranslatedString       // In case of credential removal
-	SignedMessage []byte                                                          // In case of signature sessions
+	Removed       map[irma.CredentialTypeIdentifier][]irma.TranslatedString `json:",omitempty"` // In case of credential removal
+	SignedMessage []byte                                                    `json:",omitempty"` // In case of signature sessions
+	Timestamp     *atum.Timestamp                                           `json:",omitempty"` // In case of signature sessions
 
-	response    interface{}     // Our response (ProofList or IssueCommitmentMessage)
-	rawResponse json.RawMessage // Unparsed []byte version of response
+	IssueCommitment *gabi.IssueCommitmentMessage `json:",omitempty"`
+	ProofList       gabi.ProofList               `json:",omitempty"`
 }
 
 const actionRemoval = irma.Action("removal")
 
+// GetDisclosedCredentials gets the list of disclosed credentials for a log entry
+func (entry *LogEntry) GetDisclosedCredentials(conf *irma.Configuration) (irma.DisclosedCredentialList, error) {
+	if entry.Type == actionRemoval {
+		return irma.DisclosedCredentialList{}, nil
+	}
+	var proofs gabi.ProofList
+	if entry.Type == irma.ActionIssuing {
+		proofs = entry.IssueCommitment.Proofs
+	} else {
+		proofs = entry.ProofList
+	}
+	return irma.ExtractDisclosedCredentials(conf, proofs)
+}
+
+// GetIssuedCredentials gets the list of issued credentials for a log entry
+func (entry *LogEntry) GetIssuedCredentials(conf *irma.Configuration) (list irma.CredentialInfoList, err error) {
+	if entry.Type != irma.ActionIssuing {
+		return irma.CredentialInfoList{}, nil
+	}
+	jwt, err := irma.ParseRequestorJwt(irma.ActionIssuing, entry.SessionInfo.Jwt)
+	if err != nil {
+		return
+	}
+	ir := jwt.IrmaSession().(*irma.IssuanceRequest)
+	return ir.GetCredentialInfoList(conf, entry.Version)
+}
+
+// GetSignedMessage gets the signed for a log entry
+func (entry *LogEntry) GetSignedMessage() (abs *irma.IrmaSignedMessage, err error) {
+	if entry.Type != irma.ActionSigning {
+		return nil, nil
+	}
+	return &irma.IrmaSignedMessage{
+		Signature: entry.ProofList,
+		Nonce:     entry.SessionInfo.Nonce,
+		Context:   entry.SessionInfo.Context,
+		Message:   string(entry.SignedMessage),
+		Timestamp: entry.Timestamp,
+	}, nil
+}
+
 func (session *session) createLogEntry(response interface{}) (*LogEntry, error) {
 	entry := &LogEntry{
 		Type:        session.Action,
 		Time:        irma.Timestamp(time.Now()),
-		SessionInfo: session.info,
-		response:    response,
+		Version:     session.Version,
+		SessionInfo: (*LogSessionInfo)(session.info),
 	}
 
-	// Populate session type-specific fields of the log entry (except for .Disclosed which is handled below)
-	var prooflist gabi.ProofList
-	var ok bool
 	switch entry.Type {
+	case actionRemoval:
+
 	case irma.ActionSigning:
-		if session.IsInteractive() {
-			entry.SignedMessage = []byte(session.jwt.(*irma.SignatureRequestorJwt).Request.Request.Message)
-		} else {
-			request, ok := session.irmaSession.(*irma.SignatureRequest)
-			if !ok {
-				return nil, errors.New("Session does not contain a valid Signature Request")
-			}
-			entry.SignedMessage = []byte(request.Message)
-		}
+		// Get the signed message and timestamp
+		request := session.irmaSession.(*irma.SignatureRequest)
+		entry.SignedMessage = []byte(request.Message)
+		entry.Timestamp = request.Timestamp
+
 		fallthrough
 	case irma.ActionDisclosing:
-		if prooflist, ok = response.(gabi.ProofList); !ok {
-			return nil, errors.New("Response was not a ProofList")
-		}
+		entry.ProofList = response.(gabi.ProofList)
 	case irma.ActionIssuing:
-		if entry.Received == nil {
-			entry.Received = map[irma.CredentialTypeIdentifier][]irma.TranslatedString{}
-		}
-		for _, req := range session.jwt.(*irma.IdentityProviderJwt).Request.Request.Credentials {
-			list, err := req.AttributeList(session.client.Configuration, getMetadataVersion(session.Version))
-			if err != nil {
-				continue // TODO?
-			}
-			entry.Received[list.CredentialType().Identifier()] = list.Strings()
-		}
-		var msg *gabi.IssueCommitmentMessage
-		if msg, ok = response.(*gabi.IssueCommitmentMessage); ok {
-			prooflist = msg.Proofs
-		} else {
-			return nil, errors.New("Response was not a *IssueCommitmentMessage")
-		}
+		entry.IssueCommitment = response.(*gabi.IssueCommitmentMessage)
 	default:
 		return nil, errors.New("Invalid log type")
 	}
 
-	// Populate the list of disclosed attributes .Disclosed
-	for _, proof := range prooflist {
-		if proofd, isproofd := proof.(*gabi.ProofD); isproofd {
-			if entry.Disclosed == nil {
-				entry.Disclosed = map[irma.CredentialTypeIdentifier]map[int]irma.TranslatedString{}
-			}
-			meta := irma.MetadataFromInt(proofd.ADisclosed[1], session.client.Configuration)
-			id := meta.CredentialType().Identifier()
-			entry.Disclosed[id] = map[int]irma.TranslatedString{}
-			for i, attr := range proofd.ADisclosed {
-				if i == 1 {
-					continue
-				}
-				val := string(attr.Bytes())
-				entry.Disclosed[id][i] = irma.TranslatedString{"en": val, "nl": val}
-			}
-		}
-	}
-
 	return entry, nil
 }
 
@@ -103,110 +106,3 @@ func (session *session) createLogEntry(response interface{}) (*LogEntry, error)
 func (entry *LogEntry) Jwt() (irma.RequestorJwt, error) {
 	return irma.ParseRequestorJwt(entry.Type, entry.SessionInfo.Jwt)
 }
-
-// GetResponse returns our response to the requestor from the log entry.
-func (entry *LogEntry) GetResponse() (interface{}, error) {
-	if entry.response == nil {
-		switch entry.Type {
-		case actionRemoval:
-			return nil, nil
-		case irma.ActionSigning:
-			fallthrough
-		case irma.ActionDisclosing:
-			entry.response = []*gabi.ProofD{}
-		case irma.ActionIssuing:
-			entry.response = &gabi.IssueCommitmentMessage{}
-		default:
-			return nil, errors.New("Invalid log type")
-		}
-		err := json.Unmarshal(entry.rawResponse, entry.response)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	return entry.response, nil
-}
-
-type jsonLogEntry struct {
-	Type        irma.Action
-	Time        irma.Timestamp
-	SessionInfo *logSessionInfo
-
-	Disclosed     map[irma.CredentialTypeIdentifier]map[int]irma.TranslatedString `json:",omitempty"`
-	Received      map[irma.CredentialTypeIdentifier][]irma.TranslatedString       `json:",omitempty"`
-	Removed       map[irma.CredentialTypeIdentifier][]irma.TranslatedString       `json:",omitempty"`
-	SignedMessage []byte                                                          `json:",omitempty"`
-
-	Response json.RawMessage
-}
-
-// UnmarshalJSON implements json.Unmarshaler.
-func (entry *LogEntry) UnmarshalJSON(bytes []byte) error {
-	var err error
-	temp := &jsonLogEntry{}
-	if err = json.Unmarshal(bytes, temp); err != nil {
-		return err
-	}
-
-	*entry = LogEntry{
-		Type: temp.Type,
-		Time: temp.Time,
-		SessionInfo: &irma.SessionInfo{
-			Jwt:     temp.SessionInfo.Jwt,
-			Nonce:   temp.SessionInfo.Nonce,
-			Context: temp.SessionInfo.Context,
-			Keys:    make(map[irma.IssuerIdentifier]int),
-		},
-		Removed:       temp.Removed,
-		Disclosed:     temp.Disclosed,
-		Received:      temp.Received,
-		SignedMessage: temp.SignedMessage,
-		rawResponse:   temp.Response,
-	}
-
-	// TODO remove on protocol upgrade
-	for iss, count := range temp.SessionInfo.Keys {
-		entry.SessionInfo.Keys[irma.NewIssuerIdentifier(iss)] = count
-	}
-
-	return nil
-}
-
-// MarshalJSON implements json.Marshaler.
-func (entry *LogEntry) MarshalJSON() ([]byte, error) {
-	// If the entry was created using createLogEntry(), then entry.rawResponse == nil
-	if len(entry.rawResponse) == 0 && entry.response != nil {
-		if bytes, err := json.Marshal(entry.response); err == nil {
-			entry.rawResponse = json.RawMessage(bytes)
-		} else {
-			return nil, err
-		}
-	}
-
-	var si *logSessionInfo
-	if entry.SessionInfo != nil {
-		si = &logSessionInfo{
-			Jwt:     entry.SessionInfo.Jwt,
-			Nonce:   entry.SessionInfo.Nonce,
-			Context: entry.SessionInfo.Context,
-			Keys:    make(map[string]int),
-		}
-		// TODO remove on protocol upgrade
-		for iss, count := range entry.SessionInfo.Keys {
-			si.Keys[iss.String()] = count
-		}
-	}
-	temp := &jsonLogEntry{
-		Type:          entry.Type,
-		Time:          entry.Time,
-		Response:      entry.rawResponse,
-		SessionInfo:   si,
-		Removed:       entry.Removed,
-		Disclosed:     entry.Disclosed,
-		Received:      entry.Received,
-		SignedMessage: entry.SignedMessage,
-	}
-
-	return json.Marshal(temp)
-}

irmaclient/session.go

@@ -51,15 +51,6 @@ type SessionDismisser interface {
 	Dismiss()
 }
 
-// getMetadataVersion maps a chosen protocol version to a metadata version that
-// the server will use.
-func getMetadataVersion(v *irma.ProtocolVersion) byte {
-	if v.Below(2, 3) {
-		return 0x02 // no support for optional attributes
-	}
-	return 0x03 // current version
-}
-
 type session struct {
 	Action  irma.Action
 	Handler Handler
@@ -342,13 +333,14 @@ func (session *session) start() {
 
 	if session.Action == irma.ActionIssuing {
 		ir := session.irmaSession.(*irma.IssuanceRequest)
+		_, err := ir.GetCredentialInfoList(session.client.Configuration, session.Version)
+		if err != nil {
+			session.fail(&irma.SessionError{ErrorType: irma.ErrorUnknownCredentialType, Err: err})
+			return
+		}
+
+		// Calculate singleton credentials to be removed
 		for _, credreq := range ir.Credentials {
-			info, err := credreq.Info(session.client.Configuration, getMetadataVersion(session.Version))
-			if err != nil {
-				session.fail(&irma.SessionError{ErrorType: irma.ErrorUnknownCredentialType, Err: err})
-				return
-			}
-			ir.CredentialInfoList = append(ir.CredentialInfoList, info)
 			preexistingCredentials := session.client.attrs(*credreq.CredentialTypeID)
 			if len(preexistingCredentials) != 0 && preexistingCredentials[0].IsValid() && preexistingCredentials[0].CredentialType().IsSingleton {
 				ir.RemovalCredentialInfoList = append(ir.RemovalCredentialInfoList, preexistingCredentials[0].Info())

irmaclient/updates.go

@@ -6,6 +6,7 @@ import (
 	"html"
 	"io/ioutil"
 	"math/big"
+	"regexp"
 	"time"
 
 	"github.com/go-errors/errors"
@@ -73,6 +74,38 @@ var clientUpdates = []func(client *Client) error{
 
 	// Remove the test scheme manager which was erroneously included in a production build
 	nil, // No longer necessary, also broke many unit tests
+
+	// Guess and include version protocol in issuance logs
+	func(client *Client) (err error) {
+		logs, err := client.Logs()
+		if err != nil {
+			return
+		}
+		for _, log := range logs {
+			if log.Type != irma.ActionIssuing {
+				continue
+			}
+			// Ugly hack alert: unfortunately the protocol version that was used in the session is nowhere recorded.
+			// This means that we cannot be sure whether or not we should byteshift the presence bit out of the attributes
+			// that was introduced in version 2.3 of the protocol. The only thing that I can think of to determine this
+			// is to check if the attributes are human-readable, i.e., alphanumeric: if the presence bit is present and
+			// we do not shift it away, then they almost certainly will not be.
+			var jwt irma.RequestorJwt
+			jwt, err = log.Jwt()
+			if err != nil {
+				return
+			}
+			for _, attr := range jwt.IrmaSession().(*irma.IssuanceRequest).Credentials[0].Attributes {
+				if regexp.MustCompile("^\\w").Match([]byte(attr)) {
+					log.Version = irma.NewVersion(2, 2)
+				} else {
+					log.Version = irma.NewVersion(2, 3)
+				}
+				break
+			}
+		}
+		return client.storage.StoreLogs(logs)
+	},
 }
 
 // update performs any function from clientUpdates that has not

irmago_test.go

@@ -293,7 +293,7 @@ func TestVerifyValidSig(t *testing.T) {
 	attributeList := sigProofResult.ToAttributeResultList()
 	require.Len(t, attributeList, 1)
 	require.Equal(t, attributeList[0].AttributeProofStatus, PRESENT)
-	require.Equal(t, attributeList[0].AttributeValue, "456")
+	require.Equal(t, attributeList[0].AttributeValue["en"], "456")
 
 	// Test if we can verify it with a request that contains strings instead of ints for nonce and context
 	stringRequest := "{\"nonce\": \"42\", \"context\": \"1337\", \"message\":\"I owe you everything\",\"content\":[{\"label\":\"Student number (RU)\",\"attributes\":[\"irma-demo.RU.studentCard.studentID\"]}]}"
@@ -310,7 +310,7 @@ func TestVerifyValidSig(t *testing.T) {
 	stringAttributeList := sigProofResult.ToAttributeResultList()
 	require.Len(t, stringAttributeList, 1)
 	require.Equal(t, stringAttributeList[0].AttributeProofStatus, PRESENT)
-	require.Equal(t, stringAttributeList[0].AttributeValue, "456")
+	require.Equal(t, stringAttributeList[0].AttributeValue["en"], "456")
 
 	// Test verify against unmatched request (i.e. different nonce, context or message)
 	unmatched := "{\"nonce\": 42, \"context\": 1337, \"message\":\"I owe you NOTHING\",\"content\":[{\"label\":\"Student number (RU)\",\"attributes\":[\"irma-demo.RU.studentCard.studentID\"]}]}"
@@ -324,7 +324,7 @@ func TestVerifyValidSig(t *testing.T) {
 	proofStatus, disclosed := VerifySigWithoutRequest(conf, irmaSignedMessage)
 	require.Equal(t, proofStatus, VALID)
 	require.Len(t, disclosed, 1)
-	require.Equal(t, *disclosed[0].Attributes[NewAttributeTypeIdentifier("irma-demo.RU.studentCard.studentID")], "456")
+	require.Equal(t, disclosed[0].Attributes[NewAttributeTypeIdentifier("irma-demo.RU.studentCard.studentID")]["en"], "456")
 }
 
 func TestVerifyInValidSig(t *testing.T) {

messages.go

@@ -31,6 +31,26 @@ func (v *ProtocolVersion) String() string {
 	return fmt.Sprintf("%d.%d", v.major, v.minor)
 }
 
+func (v *ProtocolVersion) UnmarshalJSON(b []byte) (err error) {
+	var str string
+	if err := json.Unmarshal(b, &str); err != nil {
+		return err
+	}
+	parts := strings.Split(str, ".")
+	if len(parts) != 2 {
+		return errors.New("Invalid protocol version number: not of form x.y")
+	}
+	if v.major, err = strconv.Atoi(parts[0]); err != nil {
+		return
+	}
+	v.minor, err = strconv.Atoi(parts[1])
+	return
+}
+
+func (v *ProtocolVersion) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.String())
+}
+
 // Returns true if v is below the given version.
 func (v *ProtocolVersion) Below(major, minor int) bool {
 	if v.major < major {
@@ -39,6 +59,15 @@ func (v *ProtocolVersion) Below(major, minor int) bool {
 	return v.major == major && v.minor < minor
 }
 
+// GetMetadataVersion maps a chosen protocol version to a metadata version that
+// the server will use.
+func GetMetadataVersion(v *ProtocolVersion) byte {
+	if v.Below(2, 3) {
+		return 0x02 // no support for optional attributes
+	}
+	return 0x03 // current version
+}
+
 // Action encodes the session type of an IRMA session (e.g., disclosing).
 type Action string
 

requests.go

@@ -68,9 +68,11 @@ type SignatureRequest struct {
 // optionally also asking for certain attributes to be simultaneously disclosed.
 type IssuanceRequest struct {
 	SessionRequest
-	Credentials               []*CredentialRequest     `json:"credentials"`
-	Disclose                  AttributeDisjunctionList `json:"disclose"`
-	CredentialInfoList        CredentialInfoList       `json:",omitempty"`
+	Credentials []*CredentialRequest     `json:"credentials"`
+	Disclose    AttributeDisjunctionList `json:"disclose"`
+
+	// Derived data
+	CredentialInfoList        CredentialInfoList `json:",omitempty"`
 	RemovalCredentialInfoList CredentialInfoList
 }
 
@@ -246,6 +248,19 @@ func (ir *IssuanceRequest) ToDisclose() AttributeDisjunctionList {
 	return ir.Disclose
 }
 
+func (ir *IssuanceRequest) GetCredentialInfoList(conf *Configuration, version *ProtocolVersion) (CredentialInfoList, error) {
+	if ir.CredentialInfoList == nil {
+		for _, credreq := range ir.Credentials {
+			info, err := credreq.Info(conf, GetMetadataVersion(version))
+			if err != nil {
+				return nil, err
+			}
+			ir.CredentialInfoList = append(ir.CredentialInfoList, info)
+		}
+	}
+	return ir.CredentialInfoList, nil
+}
+
 // GetContext returns the context of this session.
 func (ir *IssuanceRequest) GetContext() *big.Int { return ir.Context }
 

verify.go

@@ -38,7 +38,8 @@ type SignatureProofResult struct {
 // DisclosedCredential contains raw disclosed credentials, without any extra parsing information
 type DisclosedCredential struct {
 	metadataAttribute *MetadataAttribute
-	Attributes        map[AttributeTypeIdentifier]*string `json:"attributes"`
+	rawAttributes     map[AttributeTypeIdentifier]*string
+	Attributes        map[AttributeTypeIdentifier]TranslatedString `json:"attributes"`
 }
 
 type DisclosedCredentialList