ec-sri-invoice-signer/dist/src/signature/signature.js

Ecuador SRI invoice signer.

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.signInvoiceXml = void 0;
const c14n_1 = require("../canonicalization/c14n");
const constants_1 = require("../utils/constants");
const cryptography_1 = require("../utils/cryptography");
const Utils = __importStar(require("../utils/utils"));
const keyInfo_1 = require("./templates/keyInfo");
const signature_1 = require("./templates/signature");
const signedInfo_1 = require("./templates/signedInfo");
const signedProperties_1 = require("./templates/signedProperties");
const insertSignatureIntoInvoiceXml = (invoiceXml, signatureXml) => {
    return invoiceXml.replace('</factura>', `${signatureXml}</factura>`);
};
/**
 *
 * @param invoiceXml The invoice XML to be signed.
 * @param pkcs12Data The pkcs12 file (.p12/.pfx) data expressed as a node Buffer or base64 string.
 * @param options Options are:
 * - **pkcs12Password**: The pkcs12 file password. Defaults to no password.
 * @returns
 */
const signInvoiceXml = (invoiceXml, pkcs12Data, options) => {
    const signingTime = Utils.getDate();
    const { privateKey, certificate } = (0, cryptography_1.extractPrivateKeyAndCertificateFromPkcs12)(pkcs12Data, options === null || options === void 0 ? void 0 : options.pkcs12Password);
    const { exponent: certificateExponent, modulus: certificateModulus } = (0, cryptography_1.extractPrivateKeyData)(privateKey);
    const { issuerName: x509IssuerName, serialNumber: x509SerialNumber, content: certificateContent, contentHash: x509Hash } = (0, cryptography_1.extractX509Data)(certificate);
    // IDs
    const invoiceTagId = 'comprobante';
    const invoiceTagRefId = `InvoiceRef-${Utils.getRandomUuid()}`;
    const keyInfoTagId = `Certificate-${Utils.getRandomUuid()}`;
    const keyInfoRefTagId = `CertificateRef-${Utils.getRandomUuid()}`;
    const signedInfoTagId = `SignedInfo-${Utils.getRandomUuid()}`;
    const signedPropertiesRefTagId = `SignedPropertiesRef-${Utils.getRandomUuid()}`;
    const signedPropertiesTagId = `SignedProperties-${Utils.getRandomUuid()}`;
    const signatureTagId = `Signature-${Utils.getRandomUuid()}`;
    const signatureObjectTagId = `SignatureObject-${Utils.getRandomUuid()}`;
    const signatureValueTagId = `SignatureValue-${Utils.getRandomUuid()}`;
    // XML sections, hashes and signature
    const keyInfoTag = (0, keyInfo_1.buildKeyInfoTag)({
        certificateContent,
        certificateExponent,
        certificateModulus,
        keyInfoTagId
    });
    const signedPropertiesTag = (0, signedProperties_1.buildSignedPropertiesTag)({
        invoiceTagRefId,
        signedPropertiesTagId,
        signingTime,
        x509Hash,
        x509IssuerName,
        x509SerialNumber
    });
    const invoiceHash = (0, cryptography_1.getHash)((0, c14n_1.c14nCanonicalize)(invoiceXml));
    const signedPropertiesTagHash = (0, cryptography_1.getHash)((0, c14n_1.c14nCanonicalize)(signedPropertiesTag, { inheritedNamespaces: [{ prefix: 'xades', uri: constants_1.XmlProperties.namespaces.xades }, { prefix: 'ds', uri: constants_1.XmlProperties.namespaces.ds }] }));
    const keyInfoTagHash = (0, cryptography_1.getHash)((0, c14n_1.c14nCanonicalize)(keyInfoTag, { inheritedNamespaces: [{ prefix: 'ds', uri: constants_1.XmlProperties.namespaces.ds }] }));
    const signedInfoTag = (0, signedInfo_1.buildSignedInfoTag)({
        invoiceHash,
        invoiceTagId,
        invoiceTagRefId,
        keyInfoRefTagId,
        keyInfoTagHash,
        keyInfoTagId,
        signedInfoTagId,
        signedPropertiesRefTagId,
        signedPropertiesTagHash,
        signedPropertiesTagId
    });
    const signedSignedInfoTag = (0, cryptography_1.sign)((0, c14n_1.c14nCanonicalize)(signedInfoTag, { inheritedNamespaces: [{ prefix: 'ds', uri: constants_1.XmlProperties.namespaces.ds }] }), privateKey);
    const signatureTag = (0, signature_1.buildSignatureTag)({
        keyInfoTag,
        signatureTagId,
        signatureObjectTagId,
        signedInfoTag,
        signedSignedInfoTag,
        signatureValueTagId,
        signedPropertiesTag
    });
    return insertSignatureIntoInvoiceXml(invoiceXml, signatureTag);
};
exports.signInvoiceXml = signInvoiceXml;