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(This package attempts to reduce the likelihood of sensitive data being exposed. It supports all major operating systems and is written in pure Go.
Features
- Sensitive data is encrypted and authenticated in memory using xSalsa20 and Poly1305 respectively. The scheme also defends against cold-boot attacks.
- Memory allocation bypasses the language runtime by using system calls to query the kernel for resources directly. This avoids interference from the garbage-collector.
- Buffers that store plaintext data are fortified with guard pages and canary values to detect spurious accesses and overflows.
- Effort is taken to prevent sensitive data from touching the disk. This includes locking memory to prevent swapping and handling core dumps.
- Kernel-level immutability is implemented so that attempted modification of protected regions results in an access violation.
- Multiple endpoints provide session purging and safe termination capabilities as well as signal handling to prevent remnant data being left behind.
- Side-channel attacks are mitigated against by making sure that the copying and comparison of data is done in constant-time.
- Accidental memory leaks are mitigated against by harnessing the garbage-collector to automatically destroy containers that have become unreachable.
Some features were inspired by libsodium, so credits to them.
Full documentation and a complete overview of the API can be found here. Interesting and useful code samples can be found within the examples subpackage.
Installation
$ go get github.com/awnumar/memguard
API is experimental and may have unstable changes. You should pin a version. [modules]
Contributing
- Submitting program samples to
./examples. - Reporting bugs, vulnerabilities, and any difficulties in using the API.
- Writing useful security and crypto libraries that utilise memguard.
- Implementing kernel-specific/cpu-specific protections.
- Submitting performance improvements.
Issues are for reporting bugs and for discussion on proposals. Pull requests should be made against master.