argon2: add page (#8814)

pages/common/argon2.md

@@ -0,0 +1,20 @@
+# argon2
+
+> Calculate Argon2 cryptographic hashes.
+> More information: <https://github.com/P-H-C/phc-winner-argon2#command-line-utility>.
+
+- Calculate a hash with a password and a salt with the default parameters:
+
+`echo "{{password}}" | argon2 "{{salt_text}}"`
+
+- Calculate a hash with the specified algorithm:
+
+`echo "{{password}}" | argon2 "{{salt_text}}" -{{d|i|id}}`
+
+- Display the output hash without additional information:
+
+`echo "{{password}}" | argon2 "{{salt_text}}" -e`
+
+- Calculate a hash with given iteration [t]imes, [m]emory usage, and [p]arallelism parameters:
+
+`echo "{{password}}" | argon2 "{{salt_text}}" -t {{5}} -m {{20}} -p {{7}}`