mirror of
https://github.com/openssl/openssl.git
synced 2024-12-03 05:41:46 +08:00
11a1b341f3
We rename these function to EVP_PKEY_CTX_get_group_name and EVP_PKEY_CTX_set_group_name so that they can be used for other algorithms other than EC. Reviewed-by: Shane Lontis <shane.lontis@oracle.com> (Merged from https://github.com/openssl/openssl/pull/11914)
109 lines
3.5 KiB
Plaintext
109 lines
3.5 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
EVP_PKEY_gettable_params, EVP_PKEY_get_int_param, EVP_PKEY_get_size_t_param,
|
|
EVP_PKEY_get_bn_param, EVP_PKEY_get_utf8_string_param,
|
|
EVP_PKEY_get_octet_string_param
|
|
- retrieve key parameters from a key
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
const OSSL_PARAM *EVP_PKEY_gettable_params(EVP_PKEY *pkey);
|
|
int EVP_PKEY_get_int_param(EVP_PKEY *pkey, const char *key_name, int *out);
|
|
int EVP_PKEY_get_size_t_param(EVP_PKEY *pkey, const char *key_name, size_t *out);
|
|
int EVP_PKEY_get_bn_param(EVP_PKEY *pkey, const char *key_name, BIGNUM **bn);
|
|
int EVP_PKEY_get_utf8_string_param(EVP_PKEY *pkey, const char *key_name,
|
|
char *str, size_t max_buf_sz, size_t *out_sz);
|
|
int EVP_PKEY_get_octet_string_param(EVP_PKEY *pkey, const char *key_name,
|
|
unsigned char *buf, size_t max_buf_sz,
|
|
size_t *out_sz);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
EVP_PKEY_gettable_params() returns a constant list of I<params> indicating
|
|
the names and types of key parameters that can be retrieved.
|
|
See L<OSSL_PARAM(3)> for information about parameters.
|
|
|
|
EVP_PKEY_get_int_param() retrieves a key I<pkey> integer value I<*out>
|
|
associated with a name of I<key_name>.
|
|
|
|
EVP_PKEY_get_size_t_param() retrieves a key I<pkey> size_t value I<*out>
|
|
associated with a name of I<key_name>.
|
|
|
|
EVP_PKEY_get_bn_param() retrieves a key I<pkey> BIGNUM value I<**bn>
|
|
associated with a name of I<key_name>. If I<*bn> is NULL then the BIGNUM
|
|
is allocated by the method.
|
|
|
|
EVP_PKEY_get_utf8_string_param() get a key I<pkey> UTF8 string value int a buffer
|
|
I<str> of maximum size I<max_buf_sz> associated with a name of I<key_name>.
|
|
I<*out_sz> is the returned size of the string if it is not NULL.
|
|
|
|
EVP_PKEY_get_octet_string_param() copy a I<pkey>'s octet string value into a buffer
|
|
I<buf> of maximum size I<max_buf_sz> associated with a name of I<key_name>.
|
|
I<*out_sz> is the returned size of the buffer if it is not NULL.
|
|
|
|
=head1 NOTES
|
|
|
|
These functions only work for B<EVP_PKEY>s that contain a provider side key.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
EVP_PKEY_gettable_params() returns NULL on error or if it is not supported,
|
|
|
|
All other methods return 1 if a value associated with the key's I<key_name> was
|
|
successfully returned, or 0 if there was an error.
|
|
An error may be returned by methods EVP_PKEY_get_utf8_string_param() and
|
|
EVP_PKEY_get_octet_string_param() if I<max_buf_sz> is not big enough to hold the
|
|
value.
|
|
|
|
=head1 EXAMPLES
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
char *curve_name[64];
|
|
unsigned char pub[256];
|
|
BIGNUM *bn_priv = NULL;
|
|
|
|
/*
|
|
* NB: assumes 'key' is set up before the next step. In this example the key
|
|
* is an EC key.
|
|
*/
|
|
|
|
if (!EVP_PKEY_get_utf8_string_param(key, OSSL_PKEY_PARAM_GROUP_NAME,
|
|
curve_name, sizeof(curve_name), &len)) {
|
|
/* Error */
|
|
}
|
|
if (!EVP_PKEY_get_octet_string_param(key, OSSL_PKEY_PARAM_PUB_KEY,
|
|
pub, sizeof(pub), &len)) {
|
|
/* Error */
|
|
}
|
|
if (!EVP_PKEY_get_bn_param(key, OSSL_PKEY_PARAM_PRIV_KEY, &bn_priv)) {
|
|
/* Error */
|
|
}
|
|
|
|
|
|
BN_clear_free(bn_priv);
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<EVP_PKEY_CTX_new(3)>, L<provider-keymgmt(7)>, L<OSSL_PARAM(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
These functions were added in OpenSSL 3.0.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
this file except in compliance with the License. You can obtain a copy
|
|
in the file LICENSE in the source distribution or at
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|
|
|