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DOC: Clarify EVP_PKEY_CTX_{get,set}_app_data documentation

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Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
MergeDate: Fri Jan 23 10:14:10 2026
(Merged from https://github.com/openssl/openssl/pull/29710)
This commit is contained in:
Daniel Kubec
2026-01-21 23:48:58 +01:00
committed by Norbert Pocs
parent a4148379a8
commit d2a126c20e
1 changed files with 6 additions and 4 deletions
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10
doc/man3/EVP_PKEY_keygen.pod
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@@ -86,10 +86,12 @@ If the callback returns 0 then the key generation operation is aborted and an
error occurs. This might occur during a time consuming operation where
a user clicks on a "cancel" button.
The functions EVP_PKEY_CTX_set_app_data() and EVP_PKEY_CTX_get_app_data() set
and retrieve an opaque pointer. This can be used to set some application
defined value which can be retrieved in the callback: for example a handle
which is used to update a "progress dialog".
The functions EVP_PKEY_CTX_set_app_data() and EVP_PKEY_CTX_get_app_data()
associate an opaque, application-defined pointer with an EVP_PKEY_CTX object.
This pointer is not interpreted by the library and is reserved entirely for use
by the application. It may be used to store arbitrary context or state that
needs to be accessible wherever the corresponding EVP_PKEY_CTX is available.
EVP_PKEY_Q_keygen() abstracts from the explicit use of B<EVP_PKEY_CTX> while
providing a 'quick' but limited way of generating a new asymmetric key pair.