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Add EVP_PKEY_get0_* functions.
[thirdparty/openssl.git] / doc / crypto / X509_get_pubkey.pod
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1=pod
2
3=head1 NAME
4
5X509_get_pubkey, X509_set_pubkey, X509_get_X509_PUBKEY,
6X509_REQ_get_pubkey, X509_REQ_set_pubkey, X509_REQ_get_X509_PUBKEY - get or
7set certificate or certificate request public key.
8
9=head1 SYNOPSIS
10
11 #include <openssl/x509.h>
12
13 EVP_PKEY *X509_get_pubkey(X509 *x);
14 int X509_set_pubkey(X509 *x, EVP_PKEY *pkey);
15 X509_PUBKEY *X509_get_X509_PUBKEY(X509 *x);
16
17 EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req);
18 int X509_REQ_set_pubkey(X509_REQ *x, EVP_PKEY *pkey);
19 X509_PUBKEY *X509_REQ_get_X509_PUBKEY(X509_REQ *x);
20
21=head1 DESCRIPTION
22
23X509_get_pubkey() attempts to decode the public key for certificate B<x>. If
24successful it returns the public key as an B<EVP_PKEY> pointer with its
25reference count incremented: this means the returned key must be freed up
26after use.
27
28X509_get_X509_PUBKEY() returns an internal pointer to the B<X509_PUBKEY>
29structure which encodes the certificate of B<x>. The returned value
30must not be freed up after use.
31
32X509_set_pubkey() attempts to set the public key for certificate B<x> to
33B<pkey>. The key B<pkey> should be freed up after use.
34
35X509_REQ_get_pubkey(), X509_REQ_set_pubkey() and X509_REQ_get_X509_PUBKEY()
36are similar but operate on certificate request B<req>.
37
38=head1 NOTES
39
40The first time a public key is decoded the B<EVP_PKEY> structure is
41cached in the certificate or certificate request itself. Subsequent calls
42return the cached structure with its reference count incremented to
43improve performance.
44
45=head1 RETURN VALUES
46
47X509_get_pubkey(), X509_get_X509_PUBKEY(), X509_REQ_get_pubkey() and
48X509_REQ_get_X509_PUBKEY() return a public key or B<NULL> if an error
49occurred.
50
51X509_set_pubkey() and X509_REQ_set_pubkey() rerturn 1 for success and 0
52for failure.
53
54=head1 SEE ALSO
55
56L<d2i_X509(3)>,
57L<ERR_get_error(3)>,
58L<X509_CRL_get0_by_serial(3)>,
59L<X509_get0_signature(3)>,
60L<X509_get_ext_d2i(3)>,
61L<X509_get_extension_flags(3)>,
62L<X509_get_subject_name(3)>,
63L<X509_get_version(3)>,
64L<X509_NAME_add_entry_by_txt(3)>,
65L<X509_NAME_ENTRY_get_object(3)>,
66L<X509_NAME_get_index_by_NID(3)>,
67L<X509_NAME_print_ex(3)>,
68L<X509_new(3)>,
69L<X509_sign(3)>,
70L<X509V3_get_d2i(3)>,
71L<X509_verify_cert(3)>
72
73=head1 HISTORY
74
75=cut