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import * as asn1js from "asn1js";
import * as pvutils from "pvutils";
import { AlgorithmIdentifier, AlgorithmIdentifierJson, AlgorithmIdentifierSchema } from "./AlgorithmIdentifier";
import { EMPTY_STRING } from "./constants";
import { AsnError } from "./errors";
import { PkiObject, PkiObjectParameters } from "./PkiObject";
import * as Schema from "./Schema";
const SALT = "salt";
const ITERATION_COUNT = "iterationCount";
const KEY_LENGTH = "keyLength";
const PRF = "prf";
const CLEAR_PROPS = [
SALT,
ITERATION_COUNT,
KEY_LENGTH,
PRF
];
export interface IPBKDF2Params {
salt: any;
iterationCount: number;
keyLength?: number;
prf?: AlgorithmIdentifier;
}
export interface PBKDF2ParamsJson {
salt: any;
iterationCount: number;
keyLength?: number;
prf?: AlgorithmIdentifierJson;
}
export type PBKDF2ParamsParameters = PkiObjectParameters & Partial<IPBKDF2Params>;
/**
* Represents the PBKDF2Params structure described in [RFC2898](https://www.ietf.org/rfc/rfc2898.txt)
*/
export class PBKDF2Params extends PkiObject implements IPBKDF2Params {
public static override CLASS_NAME = "PBKDF2Params";
public salt: any;
public iterationCount!: number;
public keyLength?: number;
public prf?: AlgorithmIdentifier;
/**
* Initializes a new instance of the {@link PBKDF2Params} class
* @param parameters Initialization parameters
*/
constructor(parameters: PBKDF2ParamsParameters = {}) {
super();
this.salt = pvutils.getParametersValue(parameters, SALT, PBKDF2Params.defaultValues(SALT));
this.iterationCount = pvutils.getParametersValue(parameters, ITERATION_COUNT, PBKDF2Params.defaultValues(ITERATION_COUNT));
if (KEY_LENGTH in parameters) {
this.keyLength = pvutils.getParametersValue(parameters, KEY_LENGTH, PBKDF2Params.defaultValues(KEY_LENGTH));
}
if (PRF in parameters) {
this.prf = pvutils.getParametersValue(parameters, PRF, PBKDF2Params.defaultValues(PRF));
}
if (parameters.schema) {
this.fromSchema(parameters.schema);
}
}
/**
* Returns default values for all class members
* @param memberName String name for a class member
* @returns Default value
*/
public static override defaultValues(memberName: typeof SALT): any;
public static override defaultValues(memberName: typeof ITERATION_COUNT): number;
public static override defaultValues(memberName: typeof KEY_LENGTH): number;
public static override defaultValues(memberName: typeof PRF): AlgorithmIdentifier;
public static override defaultValues(memberName: string): any {
switch (memberName) {
case SALT:
return {};
case ITERATION_COUNT:
return (-1);
case KEY_LENGTH:
return 0;
case PRF:
return new AlgorithmIdentifier({
algorithmId: "1.3.14.3.2.26", // SHA-1
algorithmParams: new asn1js.Null()
});
default:
return super.defaultValues(memberName);
}
}
/**
* @inheritdoc
* @asn ASN.1 schema
* ```asn
* PBKDF2-params ::= SEQUENCE {
* salt CHOICE {
* specified OCTET STRING,
* otherSource AlgorithmIdentifier },
* iterationCount INTEGER (1..MAX),
* keyLength INTEGER (1..MAX) OPTIONAL,
* prf AlgorithmIdentifier
* DEFAULT { algorithm hMAC-SHA1, parameters NULL } }
*```
*/
public static override schema(parameters: Schema.SchemaParameters<{
saltPrimitive?: string;
saltConstructed?: AlgorithmIdentifierSchema;
iterationCount?: string;
keyLength?: string;
prf?: AlgorithmIdentifierSchema;
}> = {}): Schema.SchemaType {
const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
return (new asn1js.Sequence({
name: (names.blockName || EMPTY_STRING),
value: [
new asn1js.Choice({
value: [
new asn1js.OctetString({ name: (names.saltPrimitive || EMPTY_STRING) }),
AlgorithmIdentifier.schema(names.saltConstructed || {})
]
}),
new asn1js.Integer({ name: (names.iterationCount || EMPTY_STRING) }),
new asn1js.Integer({
name: (names.keyLength || EMPTY_STRING),
optional: true
}),
AlgorithmIdentifier.schema(names.prf || {
names: {
optional: true
}
})
]
}));
}
public fromSchema(schema: Schema.SchemaType): void {
// Clear input data first
pvutils.clearProps(schema, CLEAR_PROPS);
// Check the schema is valid
const asn1 = asn1js.compareSchema(schema,
schema,
PBKDF2Params.schema({
names: {
saltPrimitive: SALT,
saltConstructed: {
names: {
blockName: SALT
}
},
iterationCount: ITERATION_COUNT,
keyLength: KEY_LENGTH,
prf: {
names: {
blockName: PRF,
optional: true
}
}
}
})
);
AsnError.assertSchema(asn1, this.className);
// Get internal properties from parsed schema
this.salt = asn1.result.salt;
this.iterationCount = asn1.result.iterationCount.valueBlock.valueDec;
if (KEY_LENGTH in asn1.result)
this.keyLength = asn1.result.keyLength.valueBlock.valueDec;
if (PRF in asn1.result)
this.prf = new AlgorithmIdentifier({ schema: asn1.result.prf });
}
public toSchema(): asn1js.Sequence {
//#region Create array for output sequence
const outputArray = [];
outputArray.push(this.salt);
outputArray.push(new asn1js.Integer({ value: this.iterationCount }));
if (KEY_LENGTH in this) {
if (PBKDF2Params.defaultValues(KEY_LENGTH) !== this.keyLength)
outputArray.push(new asn1js.Integer({ value: this.keyLength }));
}
if (this.prf) {
if (PBKDF2Params.defaultValues(PRF).isEqual(this.prf) === false)
outputArray.push(this.prf.toSchema());
}
//#endregion
//#region Construct and return new ASN.1 schema for this object
return (new asn1js.Sequence({
value: outputArray
}));
//#endregion
}
public toJSON(): PBKDF2ParamsJson {
const res: PBKDF2ParamsJson = {
salt: this.salt.toJSON(),
iterationCount: this.iterationCount
};
if (KEY_LENGTH in this) {
if (PBKDF2Params.defaultValues(KEY_LENGTH) !== this.keyLength)
res.keyLength = this.keyLength;
}
if (this.prf) {
if (PBKDF2Params.defaultValues(PRF).isEqual(this.prf) === false)
res.prf = this.prf.toJSON();
}
return res;
}
}
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