/// <reference types="node" />

export {};

type TypedArray =
    | Int8Array
    | Uint8Array
    | Uint8ClampedArray
    | Int16Array
    | Uint16Array
    | Int32Array
    | Uint32Array
    | Float32Array
    | Float64Array;

export interface ModuleConfiguration {
    /**
     * Path to OpenSSL binaries
     */
    pathOpenSSL: string;
}

export type PrivateKeyCipher =
    | "aes128"
    | "aes192"
    | "aes256"
    | "camellia128"
    | "camellia192"
    | "camellia256"
    | "des"
    | "des3"
    | "idea"
    | string; // allow for additions in future

export interface PrivateKeyCreationOptions {
    cipher: PrivateKeyCipher;
    password: string;
}

export interface Pkcs12CreationOptions {
    cipher?: PrivateKeyCipher | undefined;
    clientKeyPassword?: string | undefined;
    certFiles?: string[] | undefined;
}

export interface Pkcs12ReadOptions {
    p12Password?: string | undefined;
    clientKeyPassword?: string | undefined;
}

export type HashFunction = "md5" | "sha1" | "sha256" | string;
export interface CSRCreationOptions {
    /**
     *  Optional client key to use
     */
    clientKey?: string | undefined;
    clientKeyPassword?: string | undefined;
    /**
     * If clientKey is undefined, bit size to use for generating a new key (defaults to 2048)
     */
    keyBitsize?: number | undefined;
    /**
     * Hash function to use, defaults to sha256
     */
    hash?: HashFunction | undefined;
    /**
     * CSR country field
     */
    country?: string | undefined;
    /**
     * CSR state field
     */
    state?: string | undefined;
    /**
     * CSR locality field
     */
    locality?: string | undefined;
    /**
     * CSR organization field
     */
    organization?: string | undefined;
    /**
     * CSR organizational unit field
     */
    organizationUnit?: string | undefined;
    /**
     * CSR common name field, defaults to 'localhost'
     */
    commonName?: string | undefined;
    /**
     * CSR email address field
     */
    emailAddress?: string | undefined;
    /**
     * CSR config file
     */
    csrConfigFile?: string | undefined;
    /**
     * A list of subjectAltNames in the subjectAltName field
     */
    altNames?: string[] | undefined;
}

export interface CertificateCreationOptions extends CSRCreationOptions {
    /**
     * Private key for signing the certificate, if not defined a new one is generated
     */
    serviceKey?: string | undefined;
    /**
     * Password of the service key
     */
    serviceKeyPassword?: string | undefined;
    serviceCertificate?: any;
    serial?: any;
    /**
     * If set to true and serviceKey is not defined, use clientKey for signing
     */
    selfSigned?: boolean | undefined;
    /**
     * CSR for the certificate, if not defined a new one is generated from the provided parameters
     */
    csr?: string | undefined;
    /**
     * Certificate expire time in days, defaults to 365
     */
    days?: number | undefined;
    /**
     * Password of the client key
     */
    clientKeyPassword?: string | undefined;
    /**
     * extension config file - without '-extensions v3_req'
     */
    extFile?: string | undefined;
    /**
     * extension config file - with '-extensions v3_req'
     */
    config?: string | undefined;
}

export interface CertificateCreationResult {
    certificate: any;
    csr: string;
    clientKey: string;
    serviceKey: string;
}

export interface CertificateSubjectReadResult {
    country: string;
    state: string;
    locality: string;
    organization: string;
    organizationUnit: string;
    commonName: string;
    emailAddress: string;
}

export interface Pkcs12ReadResult {
    key: string;
    cert: string;
    ca: string[];
}

export type Callback<T> = (error: any, result: T) => any;

/**
 * Creates a private key
 *
 * @param [keyBitsize=2048] Size of the key, defaults to 2048bit (can also be a function)
 * @param [options] private key encryption settings, defaults to empty object (no enryption)
 * @param callback Callback function with an error object and {key}
 */
export function createPrivateKey(
    keyBitsize: number,
    options: PrivateKeyCreationOptions,
    callback: Callback<{ key: string }>,
): void;
export function createPrivateKey(
    optionsOrKeyBitsize: number | PrivateKeyCreationOptions,
    callback: Callback<{ key: string }>,
): void;
export function createPrivateKey(callback: Callback<{ key: string }>): void;

/**
 * Creates a dhparam key
 *
 * @param [keyBitsize=512] Size of the key, defaults to 512bit
 * @param callback Callback function with an error object and {dhparam}
 */
export function createDhparam(keyBitsize: number, callback: Callback<{ dhparam: string }>): void;
export function createDhparam(callback: Callback<{ dhparam: string }>): void;

/**
 * Creates a ecparam key
 *
 * @param [keyName=secp256k1] Name of the key, defaults to secp256k1
 * @param [paramEnc=explicit] Encoding of the elliptic curve parameters, defaults to explicit
 * @param [noOut=false] This option inhibits the output of the encoded version of the parameters.
 * @param callback Callback function with an error object and {ecparam}
 */
export function createEcparam(
    keyName: string,
    paramEnc: string,
    noOut: boolean,
    callback: Callback<{ ecparam: string }>,
): void;
export function createEcparam(callback: Callback<{ ecparam: string }>): void;

/**
 * Creates a Certificate Signing Request
 *
 * If options.clientKey is undefined, a new key is created automatically. The used key is included
 * in the callback return as clientKey
 *
 * @param  [options] Optional options object
 * @param callback Callback function with an error object and {csr, clientKey}
 */
export function createCSR(options: CSRCreationOptions, callback: Callback<{ csr: string; clientKey: string }>): void;
export function createCSR(callback: Callback<{ csr: string; clientKey: string }>): void;

/**
 * Creates a certificate based on a CSR. If CSR is not defined, a new one
 * will be generated automatically. For CSR generation all the options values
 * can be used as with createCSR.
 *
 * @param [CertificateCreationOptions] Optional options object
 * @param callback Callback function with an error object and {certificate, csr, clientKey, serviceKey}
 */
export function createCertificate(
    options: CertificateCreationOptions,
    callback: Callback<CertificateCreationResult>,
): void;
export function createCertificate(callback: Callback<CertificateCreationResult>): void;

/**
 * Reads subject data from a certificate or a CSR
 *
 * @param certificate PEM encoded CSR or certificate
 * @param callback Callback function with an error object and {country, state, locality, organization, organizationUnit, commonName, emailAddress}
 */
export function readCertificateInfo(certificate: string, callback: Callback<CertificateSubjectReadResult>): void;
export function readCertificateInfo(callback: Callback<CertificateSubjectReadResult>): void;

/**
 * Exports a public key from a private key, CSR or certificate
 *
 * @param certificate PEM encoded private key, CSR or certificate
 * @param callback Callback function with an error object and {publicKey}
 */
export function getPublicKey(certificate: string, callback: Callback<{ publicKey: string }>): void;
export function getPublicKey(callback: Callback<{ publicKey: string }>): void;

/**
 * Gets the fingerprint for a certificate
 *
 * @param certificate PEM encoded certificate
 * @param hash Hash function to use (either md5 sha1 or sha256, defaults to sha256)
 * @param callback Callback function with an error object and {fingerprint}
 */
export function getFingerprint(
    certificate: string,
    hash: HashFunction,
    callback: Callback<{ fingerprint: string }>,
): void;
export function getFingerprint(certificate: string, callback: Callback<{ fingerprint: string }>): void;
export function getFingerprint(callback: Callback<{ fingerprint: string }>): void;

/**
 * Gets the modulus from a certificate, a CSR or a private key
 *
 * @param certificate PEM encoded, CSR PEM encoded, or private key
 * @param password password for the certificate
 * @param callback Callback function with an error object and {modulus}
 */
export function getModulus(certificate: string, password: string, callback: Callback<{ modulus: any }>): void;
export function getModulus(certificate: string, callback: Callback<{ modulus: any }>): void;

/**
 * Gets the size and prime of DH parameters
 *
 * @param dh DH parameters PEM encoded
 * @param callback Callback function with an error object and {size, prime}
 */
export function getDhparamInfo(dh: string, callback: Callback<{ size: any; prime: any }>): void;

/**
 * Exports private key and certificate to a PKCS12 keystore
 *
 * @param key PEM encoded private key
 * @param certificate PEM encoded certificate
 * @param password Password of the result PKCS12 file
 * @param [options] object of cipher and optional client key password {cipher:'aes128', clientKeyPassword: 'xxx'}
 * @param callback Callback function with an error object and {pkcs12}
 */
export function createPkcs12(
    key: string,
    certificate: string,
    password: string,
    options: Pkcs12CreationOptions,
    callback: Callback<{ pkcs12: any }>,
): void;
export function createPkcs12(
    key: string,
    certificate: string,
    password: string,
    callback: Callback<{ pkcs12: any }>,
): void;

/**
 * Reads private key and certificate from a PKCS12 keystore
 * @param callback Callback function with an error object and {pkcs12}
 * @returns the result of the callback
 */
export function readPkcs12(
    bufferOrPath: Buffer | string,
    options: Pkcs12ReadOptions,
    callback: Callback<Pkcs12ReadResult>,
): any;
export function readPkcs12(bufferOrPath: Buffer | string, callback: Callback<Pkcs12ReadResult>): any;

/**
 * Verifies the signing chain of the passed certificate
 *
 * @param certificate PEM encoded certificate
 * @param ca List of CA certificates
 * @param callback Callback function with an error object and a boolean valid
 */
export function verifySigningChain(certificate: string, ca: string[], callback: Callback<boolean>): void;

/**
 * Check a certificate
 *
 * @param certificate PEM encoded certificate
 * @param [passphrase] password for the certificate
 * @param callback Callback function with an error object and a boolean valid
 */
export function checkCertificate(certificate: string, passphrase: string, callback: Callback<boolean>): void;
export function checkCertificate(certificate: string, callback: Callback<boolean>): void;

/**
 * check a PKCS#12 file (.pfx or.p12)
 *
 * @param bufferOrPath PKCS#12 certificate
 * @param [passphrase] optional passphrase which will be used to open the keystore
 * @param callback Callback function with an error object and a boolean valid
 */
export function checkPkcs12(bufferOrPath: Buffer | string, passphrase: string, callback: Callback<boolean>): void;
export function checkPkcs12(bufferOrPath: Buffer | string, callback: Callback<boolean>): void;

/**
 * config the pem module
 */
export function config(options: ModuleConfiguration): void;

export namespace promisified {
    /**
     * Creates a private key
     *
     * @param [keyBitsize=2048] Size of the key, defaults to 2048bit (can also be a function)
     * @param [options] private key encryption settings, defaults to empty object (no enryption)
     * @returns
     */
    function createPrivateKey(keyBitsize: number, options: PrivateKeyCreationOptions): Promise<{ key: string }>;
    function createPrivateKey(optionsOrKeyBitsize?: number | PrivateKeyCreationOptions): Promise<{ key: string }>;

    /**
     * Creates a dhparam key
     *
     * @param [keyBitsize=512] Size of the key, defaults to 512bit
     * @returns
     */
    function createDhparam(keyBitsize?: number): Promise<{ dhparam: string }>;

    /**
     * Creates a ecparam key
     *
     * @param [keyName=secp256k1] Name of the key, defaults to secp256k1
     * @param [paramEnc=explicit] Encoding of the elliptic curve parameters, defaults to explicit
     * @param [noOut=false] This option inhibits the output of the encoded version of the parameters.
     * @returns
     */
    function createEcparam(keyName?: string, paramEnc?: string, noOut?: boolean): Promise<{ ecparam: string }>;

    /**
     * Creates a Certificate Signing Request
     *
     * If options.clientKey is undefined, a new key is created automatically. The used key is included
     * in the callback return as clientKey
     *
     * @param  [options] Optional options object
     * @returns
     */
    function createCSR(options?: CSRCreationOptions): Promise<{ csr: string; clientKey: string }>;

    /**
     * Creates a certificate based on a CSR. If CSR is not defined, a new one
     * will be generated automatically. For CSR generation all the options values
     * can be used as with createCSR.
     *
     * @param [CertificateCreationOptions] Optional options object
     * @returns
     */
    function createCertificate(options?: CertificateCreationOptions): Promise<CertificateCreationResult>;

    /**
     * Reads subject data from a certificate or a CSR
     *
     * @param certificate PEM encoded CSR or certificate
     * @returns
     */
    function readCertificateInfo(certificate: string): Promise<CertificateSubjectReadResult>;

    /**
     * Exports a public key from a private key, CSR or certificate
     *
     * @param certificate PEM encoded private key, CSR or certificate
     * @returns
     */
    function getPublicKey(certificate: string): Promise<{ publicKey: string }>;

    /**
     * Gets the fingerprint for a certificate
     *
     * @param certificate PEM encoded certificate
     * @param hash Hash function to use (either md5 sha1 or sha256, defaults to sha256)
     * @returns
     */
    function getFingerprint(
        certificate: string | Buffer | DataView | TypedArray,
        hash?: HashFunction,
    ): Promise<{ fingerprint: string }>;

    /**
     * Gets the modulus from a certificate, a CSR or a private key
     *
     * @param certificate PEM encoded, CSR PEM encoded, or private key
     * @param password password for the certificate
     * @returns
     */
    function getModulus(certificate: string, password?: string): Promise<{ modulus: any }>;

    /**
     * Gets the size and prime of DH parameters
     *
     * @param dh DH parameters PEM encoded
     * @returns
     */
    function getDhparamInfo(dh: string): Promise<{ size: any; prime: any }>;

    /**
     * Exports private key and certificate to a PKCS12 keystore
     *
     * @param key PEM encoded private key
     * @param certificate PEM encoded certificate
     * @param password Password of the result PKCS12 file
     * @param [options] object of cipher and optional client key password {cipher:'aes128', clientKeyPassword: 'xxx'}
     * @returns
     */
    function createPkcs12(
        key: string,
        certificate: string,
        password: string,
        options?: Pkcs12CreationOptions,
    ): Promise<{ pkcs12: any }>;

    /**
     * Reads private key and certificate from a PKCS12 keystore
     * @returns
     */
    function readPkcs12(bufferOrPath: Buffer | string, options?: Pkcs12ReadOptions): Promise<Pkcs12ReadResult>;

    /**
     * Check a certificate
     *
     * @param certificate PEM encoded certificate
     * @param [passphrase] password for the certificate
     * @returns
     */
    function checkCertificate(certificate: string, passphrase?: string): Promise<boolean>;

    /**
     * check a PKCS#12 file (.pfx or.p12)
     *
     * @param bufferOrPath PKCS#12 certificate
     * @param [passphrase] optional passphrase which will be used to open the keystore
     * @param callback Callback function with an error object and a boolean valid
     */
    function checkPkcs12(bufferOrPath: Buffer | string, passphrase?: string): Promise<boolean>;

    /**
     * Verifies the signing chain of the passed certificate
     *
     * @param certificate PEM encoded certificate
     * @param ca List of CA certificates
     * @returns
     */
    function verifySigningChain(certificate: string, ca: string[]): Promise<boolean>;
}