on-toggle>                 
                </mat-button-toggle-group>
            </mat-toolbar>
        </mat-card-header>
        <mat-card-content>

            <div class="option-row">
                <mat-form-field style="width: 120px">
                    <mat-select [(ngModel)]="optPattern" (ngModelChange)="handleText()" name="optPattern" placeholder="Pattern">
                        <mat-option value="SHA-1">SHA1</mat-option>
                        <mat-option value="SHA-256">SHA256</m