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Allow either privateKey, session key or password for message.decrypt()

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This commit is contained in:
Tankred Hase 2016-02-06 21:15:35 +07:00
parent 83fcbaa633
commit 31df9c07da
1 changed files with 15 additions and 8 deletions
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23
src/message.js
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@ -86,11 +86,13 @@ Message.prototype.getSigningKeyIds = function() {
/** /**
* Decrypt the message * Decrypt the message
* @param {module:key~Key|String} privateKey private key with decrypted secret data, password or session key * @param {module:key~Key} privateKey private key with decrypted secret data
* @param {String} sessionKey session key as a binary string
* @param {String} password password used to decrypt
* @return {Array<module:message~Message>} new message with decrypted content * @return {Array<module:message~Message>} new message with decrypted content
*/ */
Message.prototype.decrypt = function(privateKey) { Message.prototype.decrypt = function(privateKey, sessionKey, password) {
var keyObj = this.decryptSessionKey(privateKey); var keyObj = this.decryptSessionKey(privateKey, sessionKey, password);
if (!keyObj) { if (!keyObj) {
// nothing to decrypt return unmodified message // nothing to decrypt return unmodified message
return this; return this;
@ -108,18 +110,20 @@ Message.prototype.decrypt = function(privateKey) {
/** /**
* Decrypt session key * Decrypt session key
* @param {module:key~Key|String} privateKey private key with decrypted secret data or password * @param {module:key~Key} privateKey private key with decrypted secret data
* @param {String} sessionKey session key as a binary string
* @param {String} password password used to decrypt
* @return {Object} object with sessionKey, algo * @return {Object} object with sessionKey, algo
*/ */
Message.prototype.decryptSessionKey = function(privateKey) { Message.prototype.decryptSessionKey = function(privateKey, sessionKey, password) {
var keyPacket; var keyPacket;
if (String.prototype.isPrototypeOf(privateKey) || typeof privateKey === 'string') { if (sessionKey || password) {
var symEncryptedSessionKeyPacketlist = this.packets.filterByTag(enums.packet.symEncryptedSessionKey); var symEncryptedSessionKeyPacketlist = this.packets.filterByTag(enums.packet.symEncryptedSessionKey);
var symLength = symEncryptedSessionKeyPacketlist.length; var symLength = symEncryptedSessionKeyPacketlist.length;
for (var i = 0; i < symLength; i++) { for (var i = 0; i < symLength; i++) {
keyPacket = symEncryptedSessionKeyPacketlist[i]; keyPacket = symEncryptedSessionKeyPacketlist[i];
try { try {
keyPacket.decrypt(privateKey); keyPacket.decrypt(sessionKey || password);
break; break;
} }
catch(err) { catch(err) {
@ -132,7 +136,7 @@ Message.prototype.decryptSessionKey = function(privateKey) {
throw new Error('No symmetrically encrypted session key packet found.'); throw new Error('No symmetrically encrypted session key packet found.');
} }
} else { } else if (privateKey) {
var encryptionKeyIds = this.getEncryptionKeyIds(); var encryptionKeyIds = this.getEncryptionKeyIds();
if (!encryptionKeyIds.length) { if (!encryptionKeyIds.length) {
// nothing to decrypt // nothing to decrypt
@ -150,6 +154,9 @@ Message.prototype.decryptSessionKey = function(privateKey) {
break; break;
} }
} }
} else {
throw new Error('No key or password specified.');
} }
if (keyPacket) { if (keyPacket) {