ABC-132: sign error page parameters (#8197)

* sign error page parameters

* add comments

model/system.go

@@ -6,14 +6,16 @@ package model
 import (
 	"encoding/json"
 	"io"
+	"math/big"
 )
 
 const (
-	SYSTEM_DIAGNOSTIC_ID        = "DiagnosticId"
-	SYSTEM_RAN_UNIT_TESTS       = "RanUnitTests"
-	SYSTEM_LAST_SECURITY_TIME   = "LastSecurityTime"
-	SYSTEM_ACTIVE_LICENSE_ID    = "ActiveLicenseId"
-	SYSTEM_LAST_COMPLIANCE_TIME = "LastComplianceTime"
+	SYSTEM_DIAGNOSTIC_ID          = "DiagnosticId"
+	SYSTEM_RAN_UNIT_TESTS         = "RanUnitTests"
+	SYSTEM_LAST_SECURITY_TIME     = "LastSecurityTime"
+	SYSTEM_ACTIVE_LICENSE_ID      = "ActiveLicenseId"
+	SYSTEM_LAST_COMPLIANCE_TIME   = "LastComplianceTime"
+	SYSTEM_ASYMMETRIC_SIGNING_KEY = "AsymmetricSigningKey"
 )
 
 type System struct {
@@ -31,3 +33,14 @@ func SystemFromJson(data io.Reader) *System {
 	json.NewDecoder(data).Decode(&o)
 	return o
 }
+
+type SystemAsymmetricSigningKey struct {
+	ECDSAKey *SystemECDSAKey `json:"ecdsa_key,omitempty"`
+}
+
+type SystemECDSAKey struct {
+	Curve string   `json:"curve"`
+	X     *big.Int `json:"x"`
+	Y     *big.Int `json:"y"`
+	D     *big.Int `json:"d,omitempty"`
+}