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document -2 return value

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Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 5727582cf51e98e5e0faa435e7da2c8929533c0d)

Conflicts:
	doc/crypto/X509_NAME_get_index_by_NID.pod
This commit is contained in:
Dr. Stephen Henson 2015-07-06 14:17:49 +01:00
parent 2c9dfa18aa
commit 9b914c7f91
1 changed files with 7 additions and 0 deletions
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doc/crypto/X509_NAME_get_index_by_NID.pod
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@ -29,6 +29,7 @@ and issuer names.
X509_NAME_get_index_by_NID() and X509_NAME_get_index_by_OBJ() retrieve
the next index matching B<nid> or B<obj> after B<lastpos>. B<lastpos>
should initially be set to -1. If there are no more entries -1 is returned.
If B<nid> is invalid (doesn't correspond to a valid OID) then -2 is returned.
X509_NAME_entry_count() returns the total number of entries in B<name>.
@ -59,6 +60,10 @@ X509_NAME_get_index_by_OBJ() should be used followed by
X509_NAME_get_entry() on any matching indices and then the
various B<X509_NAME_ENTRY> utility functions on the result.
Applications which could pass invalid NIDs to X509_NAME_get_index_by_NID()
should check for the return value of -2. Alternatively the NID validity
can be determined first by checking OBJ_nid2obj(nid) is not NULL.
=head1 EXAMPLES
Process all entries:
@ -91,6 +96,8 @@ Process all commonName entries:
X509_NAME_get_index_by_NID() and X509_NAME_get_index_by_OBJ()
return the index of the next matching entry or -1 if not found.
X509_NAME_get_index_by_NID() can also return -2 if the supplied
NID is invalid.
X509_NAME_entry_count() returns the total number of entries.