Piotr Dyraga
530e40c1d4
Although the result channel send operation and context cancel are guarded by the same mutex and context is cancelled by the main thread when it receives a result message from the channnel, there is absolutely no guarantee that one goroutine can't write result to the channel after the first goroutine did the same and before the main thread cancelled the context. This is the following scenario: - Worker #1 acquires mutex, writes to the result channel - Worker #2 acquires mutex, writes to the result channel - Main thread reads from the result channel, acquires mutex, cancels the context Since our result channel (and error channel) had buffer of size 1, the Worker #2 was hanging indefinitely. Setting the buffer size to the number of goroutines fixed the problem. Alternative scenario was: - Worker #1 acquires mutex, writes to the result channel - Main thread acquires mutex, reads from the result channel, cancels the context - Worker #2 receives cancel notification so it completes without yielding the result That's why deadlock was happening only from time to time.
paillier
Go implementation of the paillier cryptosystem and threshold paillier crytposystem.
introduction
Implementation of the paillier cryptosystem. See http://en.wikipedia.org/wiki/Paillier_cryptosystem for an introduction.
The threshold paillier cryptosystem is a translation of the java version that can be found at http://cs.utdallas.edu/dspl/cgi-bin/pailliertoolbox/ that is an implementation of the algorithm defined in Damgård's paper "A Generalization of Paillier's Public-Key System with Applications to Electronic Voting".
Another important feature of the library is the ease of serilisation of all the structs in JSON and BSON.
Implements the paillier cryptosystem and threshold paillier crytposystem.
caveat
As any cryptographic library, if you use it, you need to trust it. Unfortunatly, this library as not been verified by a third party. There might be some bugs and vulnerabilities. If you find one, please fill a bug.
If you need to encrypt something serious, use the library provided by Go. If you want to have fun, use Paillier!