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1 | =pod |
2 | ||
3 | =head1 NAME | |
4 | ||
5 | EVP_PKEY_get_default_digest_nid - get default signature digest | |
6 | ||
7 | =head1 SYNOPSIS | |
8 | ||
9 | #include <openssl/evp.h> | |
10 | int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid); | |
11 | ||
12 | =head1 DESCRIPTION | |
13 | ||
14 | The EVP_PKEY_get_default_digest_nid() function sets B<pnid> to the default | |
15 | message digest NID for the public key signature operations associated with key | |
16 | B<pkey>. | |
17 | ||
18 | =head1 NOTES | |
19 | ||
20 | For all current standard OpenSSL public key algorithms SHA1 is returned. | |
21 | ||
22 | =head1 RETURN VALUES | |
23 | ||
24 | The EVP_PKEY_get_default_digest_nid() function returns 1 if the message digest | |
25 | is advisory (that is other digests can be used) and 2 if it is mandatory (other | |
26 | digests can not be used). It returns 0 or a negative value for failure. In | |
27 | particular a return value of -2 indicates the operation is not supported by the | |
28 | public key algorithm. | |
29 | ||
30 | =head1 SEE ALSO | |
31 | ||
9b86974e RS |
32 | L<EVP_PKEY_CTX_new(3)>, |
33 | L<EVP_PKEY_sign(3)>, | |
34 | L<EVP_PKEY_verify(3)>, | |
35 | L<EVP_PKEY_verify_recover(3)>, | |
7441052b DSH |
36 | |
37 | =head1 HISTORY | |
38 | ||
fb552ac6 | 39 | This function was first added to OpenSSL 1.0.0. |
7441052b DSH |
40 | |
41 | =cut |