feat: add mutation to generate new jwt secret & keys

Resolves: #150

server/resolvers/generate_jwt_keys.go

@@ -0,0 +1,60 @@
+package resolvers
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/authorizerdev/authorizer/server/constants"
+	"github.com/authorizerdev/authorizer/server/crypto"
+	"github.com/authorizerdev/authorizer/server/envstore"
+	"github.com/authorizerdev/authorizer/server/graph/model"
+	"github.com/authorizerdev/authorizer/server/token"
+	"github.com/authorizerdev/authorizer/server/utils"
+)
+
+// GenerateJWTKeysResolver mutation to generate new jwt keys
+func GenerateJWTKeysResolver(ctx context.Context, params model.GenerateJWTKeysInput) (*model.GenerateJWTKeysResponse, error) {
+	gc, err := utils.GinContextFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	if !token.IsSuperAdmin(gc) {
+		return nil, fmt.Errorf("unauthorized")
+	}
+
+	clientID := envstore.EnvStoreObj.GetStringStoreEnvVariable(constants.EnvKeyClientID)
+	if crypto.IsHMACA(params.Type) {
+		secret, _, err := crypto.NewHMACKey(params.Type, clientID)
+		if err != nil {
+			return nil, err
+		}
+		return &model.GenerateJWTKeysResponse{
+			Secret: &secret,
+		}, nil
+	}
+
+	if crypto.IsRSA(params.Type) {
+		_, privateKey, publicKey, _, err := crypto.NewRSAKey(params.Type, clientID)
+		if err != nil {
+			return nil, err
+		}
+		return &model.GenerateJWTKeysResponse{
+			PrivateKey: &privateKey,
+			PublicKey:  &publicKey,
+		}, nil
+	}
+
+	if crypto.IsECDSA(params.Type) {
+		_, privateKey, publicKey, _, err := crypto.NewECDSAKey(params.Type, clientID)
+		if err != nil {
+			return nil, err
+		}
+		return &model.GenerateJWTKeysResponse{
+			PrivateKey: &privateKey,
+			PublicKey:  &publicKey,
+		}, nil
+	}
+
+	return nil, fmt.Errorf("invalid algorithm")
+}