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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 HASH_ALGORITHM = "hashAlgorithm";
const MASK_GEN_ALGORITHM = "maskGenAlgorithm";
const SALT_LENGTH = "saltLength";
const TRAILER_FIELD = "trailerField";
const CLEAR_PROPS = [
HASH_ALGORITHM,
MASK_GEN_ALGORITHM,
SALT_LENGTH,
TRAILER_FIELD
];
export interface IRSASSAPSSParams {
/**
* Algorithms of hashing (DEFAULT sha1)
*/
hashAlgorithm: AlgorithmIdentifier;
/**
* Salt length (DEFAULT 20)
*/
maskGenAlgorithm: AlgorithmIdentifier;
/**
* Salt length (DEFAULT 20)
*/
saltLength: number;
/**
* (DEFAULT 1)
*/
trailerField: number;
}
export interface RSASSAPSSParamsJson {
hashAlgorithm?: AlgorithmIdentifierJson;
maskGenAlgorithm?: AlgorithmIdentifierJson;
saltLength?: number;
trailerField?: number;
}
export type RSASSAPSSParamsParameters = PkiObjectParameters & Partial<IRSASSAPSSParams>;
/**
* Represents the RSASSAPSSParams structure described in [RFC4055](https://datatracker.ietf.org/doc/html/rfc4055)
*/
export class RSASSAPSSParams extends PkiObject implements IRSASSAPSSParams {
public static override CLASS_NAME = "RSASSAPSSParams";
public hashAlgorithm!: AlgorithmIdentifier;
public maskGenAlgorithm!: AlgorithmIdentifier;
public saltLength!: number;
public trailerField!: number;
/**
* Initializes a new instance of the {@link RSASSAPSSParams} class
* @param parameters Initialization parameters
*/
constructor(parameters: RSASSAPSSParamsParameters = {}) {
super();
this.hashAlgorithm = pvutils.getParametersValue(parameters, HASH_ALGORITHM, RSASSAPSSParams.defaultValues(HASH_ALGORITHM));
this.maskGenAlgorithm = pvutils.getParametersValue(parameters, MASK_GEN_ALGORITHM, RSASSAPSSParams.defaultValues(MASK_GEN_ALGORITHM));
this.saltLength = pvutils.getParametersValue(parameters, SALT_LENGTH, RSASSAPSSParams.defaultValues(SALT_LENGTH));
this.trailerField = pvutils.getParametersValue(parameters, TRAILER_FIELD, RSASSAPSSParams.defaultValues(TRAILER_FIELD));
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 HASH_ALGORITHM): AlgorithmIdentifier;
public static override defaultValues(memberName: typeof MASK_GEN_ALGORITHM): AlgorithmIdentifier;
public static override defaultValues(memberName: typeof SALT_LENGTH): number;
public static override defaultValues(memberName: typeof TRAILER_FIELD): number;
public static override defaultValues(memberName: string): any {
switch (memberName) {
case HASH_ALGORITHM:
return new AlgorithmIdentifier({
algorithmId: "1.3.14.3.2.26", // SHA-1
algorithmParams: new asn1js.Null()
});
case MASK_GEN_ALGORITHM:
return new AlgorithmIdentifier({
algorithmId: "1.2.840.113549.1.1.8", // MGF1
algorithmParams: (new AlgorithmIdentifier({
algorithmId: "1.3.14.3.2.26", // SHA-1
algorithmParams: new asn1js.Null()
})).toSchema()
});
case SALT_LENGTH:
return 20;
case TRAILER_FIELD:
return 1;
default:
return super.defaultValues(memberName);
}
}
/**
* @inheritdoc
* @asn ASN.1 schema
* ```asn
* RSASSA-PSS-params ::= Sequence {
* hashAlgorithm [0] HashAlgorithm DEFAULT sha1Identifier,
* maskGenAlgorithm [1] MaskGenAlgorithm DEFAULT mgf1SHA1Identifier,
* saltLength [2] Integer DEFAULT 20,
* trailerField [3] Integer DEFAULT 1 }
*```
*/
public static override schema(parameters: Schema.SchemaParameters<{
hashAlgorithm?: AlgorithmIdentifierSchema;
maskGenAlgorithm?: AlgorithmIdentifierSchema;
saltLength?: string;
trailerField?: string;
}> = {}): Schema.SchemaType {
const names = pvutils.getParametersValue<NonNullable<typeof parameters.names>>(parameters, "names", {});
return (new asn1js.Sequence({
name: (names.blockName || EMPTY_STRING),
value: [
new asn1js.Constructed({
idBlock: {
tagClass: 3, // CONTEXT-SPECIFIC
tagNumber: 0 // [0]
},
optional: true,
value: [AlgorithmIdentifier.schema(names.hashAlgorithm || {})]
}),
new asn1js.Constructed({
idBlock: {
tagClass: 3, // CONTEXT-SPECIFIC
tagNumber: 1 // [1]
},
optional: true,
value: [AlgorithmIdentifier.schema(names.maskGenAlgorithm || {})]
}),
new asn1js.Constructed({
idBlock: {
tagClass: 3, // CONTEXT-SPECIFIC
tagNumber: 2 // [2]
},
optional: true,
value: [new asn1js.Integer({ name: (names.saltLength || EMPTY_STRING) })]
}),
new asn1js.Constructed({
idBlock: {
tagClass: 3, // CONTEXT-SPECIFIC
tagNumber: 3 // [3]
},
optional: true,
value: [new asn1js.Integer({ name: (names.trailerField || EMPTY_STRING) })]
})
]
}));
}
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,
RSASSAPSSParams.schema({
names: {
hashAlgorithm: {
names: {
blockName: HASH_ALGORITHM
}
},
maskGenAlgorithm: {
names: {
blockName: MASK_GEN_ALGORITHM
}
},
saltLength: SALT_LENGTH,
trailerField: TRAILER_FIELD
}
})
);
AsnError.assertSchema(asn1, this.className);
// Get internal properties from parsed schema
if (HASH_ALGORITHM in asn1.result)
this.hashAlgorithm = new AlgorithmIdentifier({ schema: asn1.result.hashAlgorithm });
if (MASK_GEN_ALGORITHM in asn1.result)
this.maskGenAlgorithm = new AlgorithmIdentifier({ schema: asn1.result.maskGenAlgorithm });
if (SALT_LENGTH in asn1.result)
this.saltLength = asn1.result.saltLength.valueBlock.valueDec;
if (TRAILER_FIELD in asn1.result)
this.trailerField = asn1.result.trailerField.valueBlock.valueDec;
}
public toSchema(): asn1js.Sequence {
//#region Create array for output sequence
const outputArray = [];
if (!this.hashAlgorithm.isEqual(RSASSAPSSParams.defaultValues(HASH_ALGORITHM))) {
outputArray.push(new asn1js.Constructed({
idBlock: {
tagClass: 3, // CONTEXT-SPECIFIC
tagNumber: 0 // [0]
},
value: [this.hashAlgorithm.toSchema()]
}));
}
if (!this.maskGenAlgorithm.isEqual(RSASSAPSSParams.defaultValues(MASK_GEN_ALGORITHM))) {
outputArray.push(new asn1js.Constructed({
idBlock: {
tagClass: 3, // CONTEXT-SPECIFIC
tagNumber: 1 // [1]
},
value: [this.maskGenAlgorithm.toSchema()]
}));
}
if (this.saltLength !== RSASSAPSSParams.defaultValues(SALT_LENGTH)) {
outputArray.push(new asn1js.Constructed({
idBlock: {
tagClass: 3, // CONTEXT-SPECIFIC
tagNumber: 2 // [2]
},
value: [new asn1js.Integer({ value: this.saltLength })]
}));
}
if (this.trailerField !== RSASSAPSSParams.defaultValues(TRAILER_FIELD)) {
outputArray.push(new asn1js.Constructed({
idBlock: {
tagClass: 3, // CONTEXT-SPECIFIC
tagNumber: 3 // [3]
},
value: [new asn1js.Integer({ value: this.trailerField })]
}));
}
//#endregion
//#region Construct and return new ASN.1 schema for this object
return (new asn1js.Sequence({
value: outputArray
}));
//#endregion
}
public toJSON(): RSASSAPSSParamsJson {
const res: RSASSAPSSParamsJson = {};
if (!this.hashAlgorithm.isEqual(RSASSAPSSParams.defaultValues(HASH_ALGORITHM))) {
res.hashAlgorithm = this.hashAlgorithm.toJSON();
}
if (!this.maskGenAlgorithm.isEqual(RSASSAPSSParams.defaultValues(MASK_GEN_ALGORITHM))) {
res.maskGenAlgorithm = this.maskGenAlgorithm.toJSON();
}
if (this.saltLength !== RSASSAPSSParams.defaultValues(SALT_LENGTH)) {
res.saltLength = this.saltLength;
}
if (this.trailerField !== RSASSAPSSParams.defaultValues(TRAILER_FIELD)) {
res.trailerField = this.trailerField;
}
return res;
}
}
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