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allow signature as input in high level encrypt

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This commit is contained in:
Sanjana Rajan 2017-03-22 17:04:21 -07:00
parent 83d40d29ed
commit 79160abcc9
2 changed files with 41 additions and 14 deletions
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35
src/message.js
View File

@ -104,12 +104,12 @@ Message.prototype.decrypt = function(privateKey, sessionKey, password) {
enums.packet.symEncryptedIntegrityProtected,
enums.packet.symEncryptedAEADProtected
);
if (symEncryptedPacketlist.length === 0) {
return;
}
const symEncryptedPacket = symEncryptedPacketlist[0];
return symEncryptedPacket.decrypt(keyObj.algorithm, keyObj.data).then(() => {
const resultMsg = new Message(symEncryptedPacket.packets);
symEncryptedPacket.packets = new packet.List(); // remove packets after decryption
@ -293,9 +293,10 @@ export function encryptSessionKey(sessionKey, symAlgo, publicKeys, passwords) {
/**
* Sign the message (the literal data packet of the message)
* @param {Array<module:key~Key>} privateKey private keys with decrypted secret key data for signing
* @param {Signature} signature (optional) any existing detached signature to add to the message
* @return {module:message~Message} new message with signed content
*/
Message.prototype.sign = function(privateKeys) {
Message.prototype.sign = function(privateKeys=[], signature=null) {
var packetlist = new packet.List();
@ -307,12 +308,27 @@ Message.prototype.sign = function(privateKeys) {
var literalFormat = enums.write(enums.literal, literalDataPacket.format);
var signatureType = literalFormat === enums.literal.binary ?
enums.signature.binary : enums.signature.text;
var i, signingKeyPacket;
var i, signingKeyPacket, existingSigPacketlist, onePassSig;
if (signature) {
existingSigPacketlist = signature.packets.filterByTag(enums.packet.signature);
if (existingSigPacketlist.length) {
for (i = existingSigPacketlist.length - 1; i >= 0; i--) {
var sigPacket = existingSigPacketlist[i];
onePassSig = new packet.OnePassSignature();
onePassSig.type = signatureType;
onePassSig.hashAlgorithm = config.prefer_hash_algorithm;
onePassSig.publicKeyAlgorithm = sigPacket.publicKeyAlgorithm;
onePassSig.signingKeyId = sigPacket.issuerKeyId;
packetlist.push(onePassSig);
}
}
}
for (i = 0; i < privateKeys.length; i++) {
if (privateKeys[i].isPublic()) {
throw new Error('Need private key for signing');
}
var onePassSig = new packet.OnePassSignature();
onePassSig = new packet.OnePassSignature();
onePassSig.type = signatureType;
//TODO get preferred hashg algo from key signature
onePassSig.hashAlgorithm = config.prefer_hash_algorithm;
@ -341,16 +357,19 @@ Message.prototype.sign = function(privateKeys) {
signaturePacket.sign(signingKeyPacket, literalDataPacket);
packetlist.push(signaturePacket);
}
if (signature) {
packetlist.concat(existingSigPacketlist);
}
return new Message(packetlist);
};
/**
* Create a detached signature for the message (the literal data packet of the message)
* @param {Array<module:key~Key>} privateKey private keys with decrypted secret key data for signing
* @param {Signature} signature (optional) any existing detached signature
* @return {module:signature~Signature} new detached signature of message content
*/
Message.prototype.signDetached = function(privateKeys) {
Message.prototype.signDetached = function(privateKeys=[], signature=null) {
var packetlist = new packet.List();
@ -375,6 +394,10 @@ Message.prototype.signDetached = function(privateKeys) {
signaturePacket.sign(signingKeyPacket, literalDataPacket);
packetlist.push(signaturePacket);
}
if (signature) {
var existingSigPacketlist = signature.packets.filterByTag(enums.packet.signature);
packetlist.concat(existingSigPacketlist);
}
return new sigModule.Signature(packetlist);
};

14
src/openpgp.js
View File

@ -180,12 +180,13 @@ export function decryptKey({ privateKey, passphrase }) {
* @param {String} filename (optional) a filename for the literal data packet
* @param {Boolean} armor (optional) if the return values should be ascii armored or the message/signature objects
* @param {Boolean} detached (optional) if the signature should be detached (if true, signature will be added to returned object)
* @param {Signature} signatureInput (optional) a detached signature to add to the encrypted message
* @return {Promise<Object>} encrypted (and optionally signed message) in the form:
* {data: ASCII armored message if 'armor' is true,
* message: full Message object if 'armor' is false, signature: detached signature if 'detached' is true}
* @static
*/
export function encrypt({ data, publicKeys, privateKeys, passwords, filename, armor=true, detached=false }) {
export function encrypt({ data, publicKeys, privateKeys, passwords, filename, armor=true, detached=false, signatureInput=null }) {
checkData(data); publicKeys = toArray(publicKeys); privateKeys = toArray(privateKeys); passwords = toArray(passwords);
if (!nativeAEAD() && asyncProxy) { // use web worker if web crypto apis are not supported
@ -195,16 +196,19 @@ export function encrypt({ data, publicKeys, privateKeys, passwords, filename, ar
return Promise.resolve().then(() => {
let message = createMessage(data, filename);
if (privateKeys) { // sign the message only if private keys are specified
if (!privateKeys) {
privateKeys = [];
}
if (privateKeys.length || signatureInput) { // sign the message only if private keys or signatureInput is specified
if (detached) {
var signature = message.signDetached(privateKeys);
var signature = message.signDetached(privateKeys, signatureInput);
if (armor) {
result.signature = signature.armor();
} else {
result.signature = signature;
}
} else {
message = message.sign(privateKeys);
message = message.sign(privateKeys, signatureInput);
}
}
return message.encrypt(publicKeys, passwords);
@ -243,6 +247,7 @@ export function decrypt({ message, privateKey, publicKeys, sessionKey, password,
return message.decrypt(privateKey, sessionKey, password).then(message => {
const result = parseMessage(message, format);
if (result.data) { // verify
if (!publicKeys) {
publicKeys = [];
@ -281,7 +286,6 @@ export function decrypt({ message, privateKey, publicKeys, sessionKey, password,
export function sign({ data, privateKeys, armor=true, detached=false}) {
checkString(data);
privateKeys = toArray(privateKeys);
if (asyncProxy) { // use web worker if available
return asyncProxy.delegate('sign', { data, privateKeys, armor, detached });
}