Whadda ya’ know, Solaris doesn’t come shipped with MD5 but (!) using digest, you can come a long way:
example$ digest -v -a md5 /usr/bin/vi md5 (/usr/bin/vi) = e4e3588c5212903847c66d36b1a828a5
source
Otherwise, you can download MD5 here
If you would like to check all your Solaris packages, click
edited | 01-MAR-2008 | 19:54
Oracle uses cksum:
cksum [file…]