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move qr code data generation to js-sdk

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This commit is contained in:
Bruno Windels 2020-03-31 15:46:11 +02:00
parent 5cce31b39e
commit 1353ddaa96
2 changed files with 8 additions and 137 deletions
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113
src/components/views/elements/crypto/VerificationQRCode.js
View file

@ -17,95 +17,17 @@ limitations under the License.
import React from "react";
import PropTypes from "prop-types";
import {replaceableComponent} from "../../../../utils/replaceableComponent";
import {MatrixClientPeg} from "../../../../MatrixClientPeg";
import {VerificationRequest} from "matrix-js-sdk/src/crypto/verification/request/VerificationRequest";
import {ToDeviceChannel} from "matrix-js-sdk/src/crypto/verification/request/ToDeviceChannel";
import {decodeBase64} from "matrix-js-sdk/src/crypto/olmlib";
import Spinner from "../Spinner";
import * as QRCode from "qrcode";
const CODE_VERSION = 0x02; // the version of binary QR codes we support
const BINARY_PREFIX = "MATRIX"; // ASCII, used to prefix the binary format
const MODE_VERIFY_OTHER_USER = 0x00; // Verifying someone who isn't us
const MODE_VERIFY_SELF_TRUSTED = 0x01; // We trust the master key
const MODE_VERIFY_SELF_UNTRUSTED = 0x02; // We do not trust the master key
@replaceableComponent("views.elements.crypto.VerificationQRCode")
export default class VerificationQRCode extends React.PureComponent {
static propTypes = {
prefix: PropTypes.string.isRequired,
version: PropTypes.number.isRequired,
mode: PropTypes.number.isRequired,
transactionId: PropTypes.string.isRequired, // or requestEventId
firstKeyB64: PropTypes.string.isRequired,
secondKeyB64: PropTypes.string.isRequired,
secretB64: PropTypes.string.isRequired,
qrCodeData: PropTypes.Object.isRequired,
};
static async getPropsForRequest(verificationRequest: VerificationRequest) {
const cli = MatrixClientPeg.get();
const myUserId = cli.getUserId();
const otherUserId = verificationRequest.otherUserId;
let mode = MODE_VERIFY_OTHER_USER;
if (myUserId === otherUserId) {
// Mode changes depending on whether or not we trust the master cross signing key
const myTrust = cli.checkUserTrust(myUserId);
if (myTrust.isCrossSigningVerified()) {
mode = MODE_VERIFY_SELF_TRUSTED;
} else {
mode = MODE_VERIFY_SELF_UNTRUSTED;
}
}
const requestEvent = verificationRequest.requestEvent;
const transactionId = requestEvent.getId()
? requestEvent.getId()
: ToDeviceChannel.getTransactionId(requestEvent);
const qrProps = {
prefix: BINARY_PREFIX,
version: CODE_VERSION,
mode,
transactionId,
firstKeyB64: '', // worked out shortly
secondKeyB64: '', // worked out shortly
secretB64: verificationRequest.encodedSharedSecret,
};
const myCrossSigningInfo = cli.getStoredCrossSigningForUser(myUserId);
const myDevices = (await cli.getStoredDevicesForUser(myUserId)) || [];
if (mode === MODE_VERIFY_OTHER_USER) {
// First key is our master cross signing key
qrProps.firstKeyB64 = myCrossSigningInfo.getId("master");
// Second key is the other user's master cross signing key
const otherUserCrossSigningInfo = cli.getStoredCrossSigningForUser(otherUserId);
qrProps.secondKeyB64 = otherUserCrossSigningInfo.getId("master");
} else if (mode === MODE_VERIFY_SELF_TRUSTED) {
// First key is our master cross signing key
qrProps.firstKeyB64 = myCrossSigningInfo.getId("master");
// Second key is the other device's device key
const otherDevice = verificationRequest.targetDevice;
const otherDeviceId = otherDevice ? otherDevice.deviceId : null;
const device = myDevices.find(d => d.deviceId === otherDeviceId);
qrProps.secondKeyB64 = device.getFingerprint();
} else if (mode === MODE_VERIFY_SELF_UNTRUSTED) {
// First key is our device's key
qrProps.firstKeyB64 = cli.getDeviceEd25519Key();
// Second key is what we think our master cross signing key is
qrProps.secondKeyB64 = myCrossSigningInfo.getId("master");
}
return qrProps;
}
constructor(props) {
super(props);
this.state = {
dataUri: null,
};
@ -119,39 +41,8 @@ export default class VerificationQRCode extends React.PureComponent {
}
async generateQrCode() {
let buf = Buffer.alloc(0); // we'll concat our way through life
const appendByte = (b: number) => {
const tmpBuf = Buffer.from([b]);
buf = Buffer.concat([buf, tmpBuf]);
};
const appendInt = (i: number) => {
const tmpBuf = Buffer.alloc(2);
tmpBuf.writeInt16BE(i, 0);
buf = Buffer.concat([buf, tmpBuf]);
};
const appendStr = (s: string, enc: string, withLengthPrefix = true) => {
const tmpBuf = Buffer.from(s, enc);
if (withLengthPrefix) appendInt(tmpBuf.byteLength);
buf = Buffer.concat([buf, tmpBuf]);
};
const appendEncBase64 = (b64: string) => {
const b = decodeBase64(b64);
const tmpBuf = Buffer.from(b);
buf = Buffer.concat([buf, tmpBuf]);
};
// Actually build the buffer for the QR code
appendStr(this.props.prefix, "ascii", false);
appendByte(this.props.version);
appendByte(this.props.mode);
appendStr(this.props.transactionId, "utf-8");
appendEncBase64(this.props.firstKeyB64);
appendEncBase64(this.props.secondKeyB64);
appendEncBase64(this.props.secretB64);
// Now actually assemble the QR code's data URI
const uri = await QRCode.toDataURL([{data: buf, mode: 'byte'}], {
const uri = await QRCode.toDataURL([{data: this.props.qrCodeData.buffer, mode: 'byte'}], {
errorCorrectionLevel: 'L', // we want it as trivial-looking as possible
});
this.setState({dataUri: uri});

32
src/components/views/right_panel/VerificationPanel.js
View file

@ -30,7 +30,7 @@ import {
PHASE_READY,
PHASE_DONE,
PHASE_STARTED,
PHASE_CANCELLED, VerificationRequest,
PHASE_CANCELLED,
} from "matrix-js-sdk/src/crypto/verification/request/VerificationRequest";
import Spinner from "../elements/Spinner";
@ -53,22 +53,8 @@ export default class VerificationPanel extends React.PureComponent {
constructor(props) {
super(props);
this.state = {
qrCodeProps: null, // generated by the VerificationQRCode component itself
};
this.state = {};
this._hasVerifier = false;
if (this.props.request.otherPartySupportsMethod(SCAN_QR_CODE_METHOD)) {
this._generateQRCodeProps(props.request);
}
}
async _generateQRCodeProps(verificationRequest: VerificationRequest) {
try {
this.setState({qrCodeProps: await VerificationQRCode.getPropsForRequest(verificationRequest)});
} catch (e) {
console.error(e);
// Do nothing - we won't render a QR code.
}
}
renderQRPhase(pending) {
@ -86,16 +72,10 @@ export default class VerificationPanel extends React.PureComponent {
let qrBlock;
let sasBlock;
if (showQR) {
let qrCode;
if (this.state.qrCodeProps) {
qrCode = <VerificationQRCode {...this.state.qrCodeProps} />;
} else {
qrCode = <div className='mx_VerificationPanel_QRPhase_noQR'><Spinner /></div>;
}
qrBlock =
<div className='mx_VerificationPanel_QRPhase_startOption'>
<p>{_t("Scan this unique code")}</p>
{qrCode}
<VerificationQRCode qrCodeData={request.qrCodeData} />
</div>;
}
if (showSAS) {
@ -124,7 +104,7 @@ export default class VerificationPanel extends React.PureComponent {
}
let qrBlock;
if (this.state.qrCodeProps) {
if (showQR) {
qrBlock = <div className="mx_UserInfo_container">
<h3>{_t("Verify by scanning")}</h3>
<p>{_t("Ask %(displayName)s to scan your code:", {
@ -132,7 +112,7 @@ export default class VerificationPanel extends React.PureComponent {
})}</p>
<div className="mx_VerificationPanel_qrCode">
<VerificationQRCode {...this.state.qrCodeProps} />
<VerificationQRCode qrCodeData={request.qrCodeData} />
</div>
</div>;
}
@ -150,7 +130,7 @@ export default class VerificationPanel extends React.PureComponent {
</AccessibleButton>
);
}
const sasLabel = this.state.qrCodeProps ?
const sasLabel = showQR ?
_t("If you can't scan the code above, verify by comparing unique emoji.") :
_t("Verify by comparing unique emoji.");
sasBlock = <div className="mx_UserInfo_container">