How to verify detached signature?

[Q] How to verify detached signature?

[try]

0. In addition to the detached signature itself,  still need 

the source data that was used to compute the digest and signature.
signer's certificate or public key
the timestamp when it was signed?

[example] 

openssl smime -verify -in detachedSig.dat -inform DER -content
sourceData.dat -signer signer_certificate.pem -noverify

[ref]

http://www.mail-archive.com/openssl-users@openssl.org/msg40857.html