1=pod
2
3=head1 NAME
4
5RSA_sign_ASN1_OCTET_STRING, RSA_verify_ASN1_OCTET_STRING - RSA signatures
6
7=head1 SYNOPSIS
8
9 #include <openssl/rsa.h>
10
11The following functions have been deprecated since OpenSSL 3.0, and can be
12hidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value,
13see L<openssl_user_macros(7)>:
14
15 int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char *m,
16                                unsigned int m_len, unsigned char *sigret,
17                                unsigned int *siglen, RSA *rsa);
18
19 int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
20                                  unsigned int m_len, unsigned char *sigbuf,
21                                  unsigned int siglen, RSA *rsa);
22
23=head1 DESCRIPTION
24
25All of the functions described on this page are deprecated.
26Applications should instead use EVP PKEY APIs.
27
28RSA_sign_ASN1_OCTET_STRING() signs the octet string B<m> of size
29B<m_len> using the private key B<rsa> represented in DER using PKCS #1
30padding. It stores the signature in B<sigret> and the signature size
31in B<siglen>. B<sigret> must point to B<RSA_size(rsa)> bytes of
32memory.
33
34B<dummy> is ignored.
35
36The random number generator must be seeded when calling
37RSA_sign_ASN1_OCTET_STRING().
38If the automatic seeding or reseeding of the OpenSSL CSPRNG fails due to
39external circumstances (see L<RAND(7)>), the operation will fail.
40
41RSA_verify_ASN1_OCTET_STRING() verifies that the signature B<sigbuf>
42of size B<siglen> is the DER representation of a given octet string
43B<m> of size B<m_len>. B<dummy> is ignored. B<rsa> is the signer's
44public key.
45
46=head1 RETURN VALUES
47
48RSA_sign_ASN1_OCTET_STRING() returns 1 on success, 0 otherwise.
49RSA_verify_ASN1_OCTET_STRING() returns 1 on successful verification, 0
50otherwise.
51
52The error codes can be obtained by L<ERR_get_error(3)>.
53
54=head1 BUGS
55
56These functions serve no recognizable purpose.
57
58=head1 SEE ALSO
59
60L<ERR_get_error(3)>,
61L<RAND_bytes(3)>, L<RSA_sign(3)>,
62L<RSA_verify(3)>,
63L<RAND(7)>
64
65=head1 HISTORY
66
67All of these functions were deprecated in OpenSSL 3.0.
68
69=head1 COPYRIGHT
70
71Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
72
73Licensed under the Apache License 2.0 (the "License").  You may not use
74this file except in compliance with the License.  You can obtain a copy
75in the file LICENSE in the source distribution or at
76L<https://www.openssl.org/source/license.html>.
77
78=cut
79