+++ This bug was initially created as a clone of Bug #608639 +++

Description of problem:

The various sub-commands of openssl that use digests only list a few older types and do not indicate there are more available.

How reproducible:

$ openssl x509 -h
[snip]
 -md2/-md5/-sha1/-mdc2 - digest to use

$ openssl  req -h
[snip]
 -[digest]      Digest to sign with (md5, sha1, md2, mdc2, md4)

$ man x509
[snip]
   -md2|-md5|-sha1|-mdc2
           the digest to use.

etc.


And the dgst sub-command man page does not provide the full list of supported digests.

Only by calling the dgst sub-command with an invalid parameter can one see the full list of digests available.

-md5            to use the md5 message digest algorithm (default)
-md4            to use the md4 message digest algorithm
-md2            to use the md2 message digest algorithm
-sha1           to use the sha1 message digest algorithm
-sha            to use the sha message digest algorithm
-sha224         to use the sha224 message digest algorithm
-sha256         to use the sha256 message digest algorithm
-sha384         to use the sha384 message digest algorithm
-sha512         to use the sha512 message digest algorithm
-mdc2           to use the mdc2 message digest algorithm
-ripemd160      to use the ripemd160 message digest algorithm



Additional info:

Since the list can change probably the best solution would be to have the various sub-commands indicate there are more digests available, and give the dgst a clearer method of listing the full list of those available.