import { Signer } from './signer';
/**
 * Options used when creating a new HSM signer implementation.
 */
export interface HSMSignerOptions {
    /**
     * The label associated with the token for the slot.
     */
    label: string;
    /**
     * The pin for the slot identified by the label.
     */
    pin: string;
    /**
     * Identifier. The CKA_ID assigned to the HSM object.
     */
    identifier: string | Buffer;
    /**
     * Optional user type for the HSM. If not specified it defaults to CKU_USER.
     */
    userType?: number;
}
/**
 * HSM signer implementation and accompanying {@link close} function to free
 * resources after use.
 */
export interface HSMSigner {
    /**
     * HSM signer implementation.
     */
    signer: Signer;
    /**
     * Close the HSM session when the signer is no longer needed.
     */
    close: () => void;
}
/**
 * Factory to create HSM Signers.
 */
export interface HSMSignerFactory {
    /**
     * Create a new HSM signing implementation based on provided HSM options.
     *
     * This returns an object with two properties:
     * 1. the signer function.
     * 2. a close function to be called when the signer is no longer required.
     *
     * @param hsmSignerOptions - The HSM signer options.
     * @returns an HSM Signer implementation.
     */
    newSigner(hsmSignerOptions: HSMSignerOptions): HSMSigner;
    /**
     * Dispose of the factory when it, and any HSM signers created by it, are no longer required.
     */
    dispose(): void;
}
export declare class HSMSignerFactoryImpl implements HSMSignerFactory {
    #private;
    constructor(library: string);
    dispose(): void;
    newSigner(hsmSignerOptions: Readonly<HSMSignerOptions>): HSMSigner;
}
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