specifying an engine (by its unique id string) will cause storeutl
to attempt to obtain a functional reference to the specified engine,
thus initialising it if needed.
The engine will then be set as the default for all available algorithms.
Search for an object having the subject name arg.
The arg must be formatted as /type0=value0/type1=value1/type2=....
Keyword characters may be escaped by \ (backslash), and whitespace is retained.
Empty values are permitted but are ignored for the search. That is,
a search with an empty value will have the same effect as not specifying
the type at all.
Search for an object having the given issuer name and serial number.
These two options must be used together.
The issuer arg must be formatted as /type0=value0/type1=value1/type2=...,
characters may be escaped by \ (backslash), no spaces are skipped.
The serial arg may be specified as a decimal value or a hex value if preceded
by 0x.
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Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
https://www.openssl.org/source/license.html.