Openssl message digest commands

saolasosme

Various message digest commands.

       blake2b512
	   BLAKE2b-512 Digest

       blake2s256
	   BLAKE2s-256 Digest

       md2 MD2 Digest

       md4 MD4 Digest

       md5 MD5 Digest

       mdc2
	   MDC2 Digest

       rmd160
	   RMD-160 Digest

       sha1
	   SHA-1 Digest

       sha224
	   SHA-2 224 Digest

       sha256
	   SHA-2 256 Digest

       sha384
	   SHA-2 384 Digest

       sha512
	   SHA-2 512 Digest

       sha3-224
	   SHA-3 224 Digest

       sha3-256
	   SHA-3 256 Digest

       sha3-384
	   SHA-3 384 Digest

       sha3-512
	   SHA-3 512 Digest

       shake128
	   SHA-3 SHAKE128 Digest

       shake256
	   SHA-3 SHAKE256 Digest

           sm3 SM3 Digest

As an example, we have used sha256 here.

Usage: sha256 [options] [file...]
  file... files to digest (default is stdin)
 -help               Display this summary
 -c                  Print the digest with separating colons
 -r                  Print the digest in coreutils format
 -out outfile        Output to filename rather than stdout
 -passin val         Input file pass phrase source
 -sign val           Sign digest using private key
 -verify val         Verify a signature using public key
 -prverify val       Verify a signature using private key
 -signature infile   File with signature to verify
 -keyform format     Key file format (PEM or ENGINE)
 -hex                Print as hex dump
 -binary             Print in binary form
 -d                  Print debug info

 -debug              Print debug info
 -fips-fingerprint   Compute HMAC with the key used in OpenSSL-FIPS fingerprint
 -hmac val           Create hashed MAC with key
 -mac val            Create MAC (not necessarily HMAC)
 -sigopt val         Signature parameter in n:v form
 -macopt val         MAC algorithm parameters in n:v form or key
 -*                  Any supported digest
 -rand val           Load the file(s) into the random number generator
 -writerand outfile  Write random data to the specified file
 -engine val         Use engine e, possibly a hardware device
 -engine_impl        Also use engine given by -engine for digest operations