3n3a/crypt

Go

Asymmetric Encrpytion with AES-256

Usage

Install the CLI

go install

Then:

crypt -h

WARNING: Decryption string contains '$' which need to be escaped in bash '$' otherwise it will error.

Build

Build flags for PROD

Source: https://words.filippo.io/shrink-your-go-binaries-with-this-one-weird-trick/

CGO_ENABLED=0 go build -ldflags="-s -w" -buildvcs=false 
# upx can cause antivirus problems...
# upx --brute crypt

Technical

Encryption Standard

Using:

AES-GCM (AEAD tbd)
- Key created with PBKDF2

Storage of Encrypted Message

Encrypted Message and Salts for Key and Message are being stored as follows:

<salt key>$<salt message>$<ciphered message>