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PaymentSerializer.js
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PaymentSerializer.js
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'use strict';
const zlib = require('zlib');
const crypto = require('crypto');
const js2xmlparser = require('js2xmlparser');
const Crypto = require('../../../crypto/Crypto');
const GenericSerializer = require('./GenericSerializer');
module.exports = class PaymentSerializer extends GenericSerializer {
constructor(order) {
super(order);
this._transactionKey = order.transactionKey;
this._xml = {
'@': this._rootAttributes,
header: {
'@': { authenticate: true },
static: {
HostID: this._hostId,
Nonce: Crypto.nonce(),
Timestamp: Crypto.timestamp(),
PartnerID: this._partnerId,
UserID: this._userId,
Product: {
'@': { Language: 'en' },
'#': this._productString,
},
OrderDetails: this._orderDetails,
BankPubKeyDigests: {
Authentication: {
'@': { Version: 'X002', Algorithm: 'http://www.w3.org/2001/04/xmlenc#sha256' },
'#': Crypto.digestPublicKey(this._keys.bankX()),
},
Encryption: {
'@': { Version: 'E002', Algorithm: 'http://www.w3.org/2001/04/xmlenc#sha256' },
'#': Crypto.digestPublicKey(this._keys.bankE()),
},
},
SecurityMedium: '0000',
NumSegments: 1,
},
mutable: {
TransactionPhase: 'Initialisation',
},
},
AuthSignature: GenericSerializer.authSignature(),
body: {
DataTransfer: {
DataEncryptionInfo: {
'@': { authenticate: true },
EncryptionPubKeyDigest: {
'@': { Version: 'E002', Algorithm: 'http://www.w3.org/2001/04/xmlenc#sha256' },
'#': Crypto.digestPublicKey(this._keys.bankE()),
},
TransactionKey: Crypto.publicEncrypt(this._keys.bankE(), this._transactionKey).toString('base64'),
},
SignatureData: {
'@': { authenticate: true },
'#': this.encryptedOrderSignature(),
},
},
},
};
if (order.hasTransactionId()) {
this._xml.header = {
'@': { authenticate: true },
static: {
HostID: this._hostId,
TransactionID: this._transactionId,
},
mutable: {
TransactionPhase: 'Transfer',
SegmentNumber: {
'@': { lastSegment: true },
'#': 1,
},
},
};
this._xml.body = {
DataTransfer: {
OrderData: this.encryptedOrderData(),
},
};
}
}
orderSignature() {
const xmlObj = {
'@': {
xmlns: 'http://www.ebics.org/S001',
'xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance',
'xsi:schemaLocation': 'http://www.ebics.org/S001 http://www.ebics.org/S001/ebics_signature.xsd',
},
OrderSignatureData: {
SignatureVersion: 'A006',
SignatureValue: this.signatureValue(),
PartnerID: this._partnerId,
UserID: this._userId,
},
};
return js2xmlparser.parse('UserSignatureData', xmlObj, this._xmlOptions);
}
signatureValue() {
const digested = Crypto.digestWithHash(this._order.document.replace(/\n|\r/g, ''));
return Crypto.sign(this._keys.a(), digested);
}
encryptedOrderData() {
const dst = zlib.deflateSync(this._order.document.replace(/\n|\r/g, ''));
const cipher = crypto.createCipheriv('aes-128-cbc', this._transactionKey, Buffer.from([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])).setAutoPadding(false);
return Buffer.concat([cipher.update(Crypto.pad(dst)), cipher.final()]).toString('base64');
}
encryptedOrderSignature() {
const dst = zlib.deflateSync(this.orderSignature());
const cipher = crypto.createCipheriv('aes-128-cbc', this._transactionKey, Buffer.from([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])).setAutoPadding(false);
return Buffer.concat([cipher.update(Crypto.pad(dst)), cipher.final()]).toString('base64');
}
};