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Update documentation for PEM callback: error is now -1.

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In previous versions of OpenSSL, the documentation for PEM_read_*
said:

   The callback B<must> return the number of characters in the
   passphrase or 0 if an error occurred.

But since c82c3462267afdbbaa5, 0 is now treated as a non-error
return value.  Applications that want to indicate an error need to
return -1 instead.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6271)
This commit is contained in:
Nick Mathewson 2018-05-16 11:07:48 -04:00 committed by Richard Levitte
parent 1bb829300a
commit bbbf752a3c
1 changed files with 1 additions and 1 deletions
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2
doc/man3/PEM_read_bio_PrivateKey.pod
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@ -295,7 +295,7 @@ for it twice) if B<rwflag> is 1. The B<u> parameter has the same
value as the B<u> parameter passed to the PEM routine. It allows
arbitrary data to be passed to the callback by the application
(for example a window handle in a GUI application). The callback
B<must> return the number of characters in the passphrase or 0 if
B<must> return the number of characters in the passphrase or -1 if
an error occurred.
=head1 EXAMPLES