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openssl cms: add error message if operation option is missing 

If the `openssl cms` command is called without specifying an
operation option, it replies with the following laconic error message:

    cms: Use -help for summary.

This commit adds a helpful error message:

    No operation option (-encrypt|-decrypt|-sign|-verify|...) specified.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8861)
This commit is contained in:
Dr. Matthias St. Pierre 2019-05-02 14:49:34 +02:00
parent 31fc48ddc3
commit 42151b8edb
1 changed files with 1 additions and 0 deletions
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apps/cms.c
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@ -640,6 +640,7 @@ int cms_main(int argc, char **argv)
goto opthelp;
}
} else if (!operation) {
BIO_printf(bio_err, "No operation option (-encrypt|-decrypt|-sign|-verify|...) specified.\n");
goto opthelp;
}