Argon2 C Reference Library
A maintained fork from the original PHC Repo

Usage

make builds the executable argon2 along with static libraries, shared or dynamic libraries.

make test verifies that your build produces valid results.

sudo make install installs it to your system.

Command-line utility

argon2 is a command-line utility to test specific Argon2 instances on your system. To show usage instructions, run ./argon2 -h

Usage:  ./argon2 [-h] salt [-i|-d|-id] [-t iterations] [-m memory] [-p parallelism] [-l hash length] [-e|-r] [-v (10|13)]
        Password is read from stdin
Parameters:
        salt            The salt to use, at least 8 characters
        -i              Use Argon2i (this is the default)
        -d              Use Argon2d instead of Argon2i
        -id             Use Argon2id instead of Argon2i
        -t N            Sets the number of iterations to N (default = 3)
        -m N            Sets the memory usage of 2^N KiB (default 12)
        -p N            Sets parallelism to N threads (default 1)
        -l N            Sets hash output length to N bytes (default 32)
        -e              Output only encoded hash
        -r              Output only the raw bytes of the hash
        -v (10|13)      Argon2 version (defaults to the most recent version, currently 13)
        -h              Print argon2 usage

For example, to hash "a strong password" using "a unique salt" using the following parameters:

• Variant = id
• Hash Length (bytes) = 32
• Iterations = 620
• Memory usage = 4096 bytes (2^12)
• Threads = 8

Execute:

$ echo -n "a strong password" | ./argon2 "a unique salt" -id -m 12 -p 8 -t 620 -l 32
Type:       Argon2id
Iterations: 620
Memory:     4096 KiB
Parallelism:    8
Hash:       5fffc57a27340c7c313def2c9be00bec9a9db36aa5787ef49876a1bf195c7bdf
Encoded:    $argon2id$v=19$m=4096,t=620,p=8$YSB1bmlxdWUgc2FsdA$X//Feic0DHwxPe8sm+AL7Jqds2qleH70mHahvxlce98
1.561 seconds
Verification ok