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/*
* CACKey SSH Agent for ChromeOS
*/
cackeySSHAgentApprovedApps = [
"pnhechapfaindjhompbnflcldabbghjo",
"okddffdblfhhnmhodogpojmfkjmhinfp"
];
/*
* XXX:TODO: Expose UI for this
*/
cackeySSHAgentFeatures = {
enabled: true,
includeKeys: true,
includeCerts: true,
legacy: false
};
/*
* Feature support checking
*/
function cackeySSHAgentGetSSHKeyTypes() {
var types = [];
if (cackeySSHAgentFeatures.includeKeys) {
types.push("ssh");
}
if (cackeySSHAgentFeatures.includeCerts) {
types.push("x509v3-ssh");
if (cackeySSHAgentFeatures.legacy) {
types.push("x509v3-sign");
}
}
return(types);
}
async function cackeySSHAgentGetCertificates() {
var certs;
if (!cackeySSHAgentFeatures.enabled) {
return([]);
}
certs = await cackeyListCertificates();
return(certs);
}
/*
* SSH Element Encoding/Decoding
*/
function cackeySSHAgentEncodeInt(uint32) {
var result;
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while (bigInt) {
result.push(bigInt & 0xff);
bigInt = bigInt >> 8;
}
result.reverse();
break;
case "object":
result = [];
new Uint8Array(bigInt.toByteArray()).forEach(function(e) {
result.push(e);
});
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result = input.slice(0, info.value);
return({
value: result,
output: input.slice(info.value)
});
}
function cackeySSHAgentEncodeArray(input) {
var result;
result = cackeySSHAgentEncodeInt(input.length);
input.forEach(function(element) {
result = result.concat(element);
});
return(result);
}
function cackeySSHAgentEncodeToUTF8Array(str) {
var utf8 = [];
if (typeof(str) === "string") {
str = str.split("").map(function(c) {
return(c.charCodeAt(0));
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buffer = buffer.join("");
break;
}
return(buffer);
}
function cackeySSHAgentEncodeCertToKeyAndID(cert) {
function cackeySSHAgentEncodeCertToKeyAndID(cert, keyType) {
var result = null, resultKey = null;
var certObj;
var certObj, certBytes;
var publicKey;
certObj = new X509;
if (!certObj) {
return(result);
}
certBytes = Array.from(new Uint8Array(cert));
certObj.readCertHex(cackeySSHAgentEncodeBinaryToHex(cert));
certObj.readCertHex(cackeySSHAgentEncodeBinaryToHex(certBytes));
publicKey = certObj.getPublicKey();
switch (keyType) {
case "ssh":
switch (publicKey.type) {
case "RSA":
resultKey = cackeySSHAgentEncodeString("ssh-rsa");
resultKey = resultKey.concat(cackeySSHAgentEncodeBigInt(publicKey.e));
resultKey = resultKey.concat(cackeySSHAgentEncodeBigInt(publicKey.n));
break;
default:
console.log("[cackeySSH] Unsupported public key type:", publicKey.type, "-- ignoring.");
switch (publicKey.type) {
case "RSA":
resultKey = cackeySSHAgentEncodeString("ssh-rsa");
resultKey = resultKey.concat(cackeySSHAgentEncodeBigInt(publicKey.e));
resultKey = resultKey.concat(cackeySSHAgentEncodeBigInt(publicKey.n));
break;
default:
console.log("[cackeySSH] Unsupported public key type:", keyType, "/", publicKey.type, "-- ignoring.");
break;
}
break;
case "x509v3-sign":
resultKey = certBytes;
break;
case "x509v3-ssh":
switch (publicKey.type) {
case "RSA":
resultKey = cackeySSHAgentEncodeString("x509v3-ssh-rsa");
/*
* Array of certificates
*/
resultKey = resultKey.concat(cackeySSHAgentEncodeArray([
cackeySSHAgentEncodeLV(certBytes)
]));
/*
* Array of OCSP responses
*/
resultKey = resultKey.concat(cackeySSHAgentEncodeArray([]));
break;
default:
console.log("[cackeySSH] Unsupported public key type:", keyType, "/", publicKey.type, "-- ignoring.");
break;
}
break;
default:
console.log("[cackeySSH] Unsupported SSH key type:", keyType, "-- ignoring.");
break;
}
if (resultKey) {
result = {
id: certObj.getSubjectString(),
type: publicKey.type,
publicKeyType: publicKey.type,
sshKeyType: keyType,
key: resultKey
};
}
return(result);
}
/*
* Command Handlers
*/
async function cackeySSHAgentCommandRequestIdentity(request) {
var response;
var certs = [];
var keys = [];
/*
* Get a list of certificates
*/
certs = await cackeyListCertificates();
certs = await cackeySSHAgentGetCertificates();
/*
* Convert each certificate to an SSH key blob
*/
cackeySSHAgentGetSSHKeyTypes().forEach(function(sshKeyType) {
certs.forEach(function(cert) {
var key;
certs.forEach(function(cert) {
var key;
key = cackeySSHAgentEncodeCertToKeyAndID(cert.certificate);
key = cackeySSHAgentEncodeCertToKeyAndID(cert.certificate, sshKeyType);
if (key) {
keys.push(key);
}
if (key) {
keys.push(key);
}
});
});
/*
* Encode response
*/
response = [];
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flags = cackeySSHAgentDecodeInt(request);
request = flags.output;
flags = flags.value;
/*
* Find the certificate that matches the requested key
*/
certs = await cackeyListCertificates();
certs = await cackeySSHAgentGetCertificates();
certToUse = null;
cackeySSHAgentGetSSHKeyTypes().forEach(function(sshKeyType) {
certs.forEach(function(cert) {
var key;
certs.forEach(function(cert) {
var key;
key = cackeySSHAgentEncodeCertToKeyAndID(cert.certificate);
key = cackeySSHAgentEncodeCertToKeyAndID(cert.certificate, sshKeyType);
if (key.key.join() == keyInfo.join()) {
certToUse = cert;
certToUseType = key.type;
}
if (key.key.join() == keyInfo.join()) {
certToUse = cert;
certToUseType = key.publicKeyType;
}
});
});
/*
* If no certificate is found, return an error
*/
if (!certToUse) {
console.info("[cackeySSH] Unable to find a certificate to match the requested key:", keyInfo);
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