5 X509_get0_signature, X509_get_signature_nid, X509_REQ_get0_signature,
6 X509_REQ_get_signature_nid, X509_CRL_get0_signature,
7 X509_CRL_get_signature_nid - signature information.
11 #include <openssl/x509.h>
13 void X509_get0_signature(ASN1_BIT_STRING **psig, X509_ALGOR **palg,
15 int X509_get_signature_nid(const X509 *x);
17 void X509_REQ_get0_signature(ASN1_BIT_STRING **psig, X509_ALGOR **palg,
19 int X509_REQ_get_signature_nid(const X509_REQ *crl);
21 void X509_CRL_get0_signature(ASN1_BIT_STRING **psig, X509_ALGOR **palg,
23 int X509_CRL_get_signature_nid(const X509_CRL *crl);
27 X509_get0_signature() sets B<*psig> to the signature of B<x> and B<*palg>
28 to the signature algorithm of B<x>. The values returned are internal
29 pointers which B<MUST NOT> be freed up after the call.
31 X509_get_signature_nid() returns the NID corresponding to the signature
34 X509_REQ_get0_signature(), X509_REQ_get_signature_nid()
35 X509_CRL_get0_signature() and X509_CRL_get_signature_nid() perform the
36 same function for certificate requests and CRLs.
40 These functions provide lower level access to signatures in certificates
41 where an application wishes to analyse or generate a signature in a form
42 where X509_sign() et al is not appropriate (for example a non standard
43 or unsupported format).
47 X509_get_signature_nid(), X509_REQ_get_signature_nid() and
48 X509_CRL_get_signature_nid() return a NID.
50 X509_get0_signature(), X509_REQ_get0_signature() and
51 X509_CRL_get0_signature() do not return values.
57 L<X509_CRL_get0_by_serial(3)>,
58 L<X509_get_ext_d2i(3)>,
59 L<X509_get_extension_flags(3)>,
60 L<X509_get_pubkey(3)>,
61 L<X509_get_subject_name(3)>,
62 L<X509_get_version(3)>,
63 L<X509_NAME_add_entry_by_txt(3)>,
64 L<X509_NAME_ENTRY_get_object(3)>,
65 L<X509_NAME_get_index_by_NID(3)>,
66 L<X509_NAME_print_ex(3)>,
70 L<X509_verify_cert(3)>
74 X509_get0_signature() and X509_get_signature_nid() were first added to
77 X509_REQ_get0_signature(), X509_REQ_get_signature_nid(),
78 X509_CRL_get0_signature() and X509_CRL_get_signature_nid() were first added