12 EVP_KEYMGMT_description,
14 EVP_KEYMGMT_do_all_provided,
15 EVP_KEYMGMT_names_do_all,
16 EVP_KEYMGMT_gettable_params,
17 EVP_KEYMGMT_settable_params,
18 EVP_KEYMGMT_gen_settable_params
19 - EVP key management routines
23 #include <openssl/evp.h>
25 typedef struct evp_keymgmt_st EVP_KEYMGMT;
27 EVP_KEYMGMT *EVP_KEYMGMT_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
28 const char *properties);
29 int EVP_KEYMGMT_up_ref(EVP_KEYMGMT *keymgmt);
30 void EVP_KEYMGMT_free(EVP_KEYMGMT *keymgmt);
31 const OSSL_PROVIDER *EVP_KEYMGMT_provider(const EVP_KEYMGMT *keymgmt);
32 int EVP_KEYMGMT_is_a(const EVP_KEYMGMT *keymgmt, const char *name);
33 int EVP_KEYMGMT_number(const EVP_KEYMGMT *keymgmt);
34 const char *EVP_KEYMGMT_name(const EVP_KEYMGMT *keymgmt);
35 const char *EVP_KEYMGMT_description(const EVP_KEYMGMT *keymgmt);
37 void EVP_KEYMGMT_do_all_provided(OSSL_LIB_CTX *libctx,
38 void (*fn)(EVP_KEYMGMT *keymgmt, void *arg),
40 int EVP_KEYMGMT_names_do_all(const EVP_KEYMGMT *keymgmt,
41 void (*fn)(const char *name, void *data),
43 const OSSL_PARAM *EVP_KEYMGMT_gettable_params(const EVP_KEYMGMT *keymgmt);
44 const OSSL_PARAM *EVP_KEYMGMT_settable_params(const EVP_KEYMGMT *keymgmt);
45 const OSSL_PARAM *EVP_KEYMGMT_gen_settable_params(const EVP_KEYMGMT *keymgmt);
49 B<EVP_KEYMGMT> is a method object that represents key management
50 implementations for different cryptographic algorithms.
51 This method object provides functionality to have providers import key
52 material from the outside, as well as export key material to the
54 Most of the functionality can only be used internally and has no
55 public interface, this object is simply passed into other functions
58 EVP_KEYMGMT_fetch() looks for an algorithm within the provider that
59 has been loaded into the B<OSSL_LIB_CTX> given by I<ctx>, having the
60 name given by I<algorithm> and the properties given by I<properties>.
62 EVP_KEYMGMT_up_ref() increments the reference count for the given
63 B<EVP_KEYMGMT> I<keymgmt>.
65 EVP_KEYMGMT_free() decrements the reference count for the given
66 B<EVP_KEYMGMT> I<keymgmt>, and when the count reaches zero, frees it.
68 EVP_KEYMGMT_provider() returns the provider that has this particular
71 EVP_KEYMGMT_is_a() checks if I<keymgmt> is an implementation of an
72 algorithm that's identifiable with I<name>.
74 EVP_KEYMGMT_number() returns the internal dynamic number assigned to
77 EVP_KEYMGMT_name() returns the algorithm name from the provided implementation
78 for the given I<keymgmt>. Note that the I<keymgmt> may have multiple synonyms
79 associated with it. In this case the first name from the algorithm
80 definition is returned. Ownership of the returned string is retained by the
81 I<keymgmt> object and should not be freed by the caller.
83 EVP_KEYMGMT_names_do_all() traverses all names for the I<keymgmt>, and
84 calls I<fn> with each name and I<data>.
86 EVP_KEYMGMT_description() returns a description of the I<keymgmt>, meant for
87 display and human consumption. The description is at the discretion of the
88 I<keymgmt> implementation.
90 EVP_KEYMGMT_do_all_provided() traverses all key keymgmt implementations by
91 all activated providers in the library context I<libctx>, and for each
92 of the implementations, calls I<fn> with the implementation method and
95 EVP_KEYMGMT_gettable_params() and EVP_KEYMGMT_settable_params() return a
96 constant B<OSSL_PARAM> array that describes the names and types of key
97 parameters that can be retrieved or set.
98 EVP_KEYMGMT_gettable_params() is used by L<EVP_PKEY_gettable_params(3)>.
99 See L<OSSL_PARAM(3)> for the use of B<OSSL_PARAM> as a parameter descriptor.
101 EVP_KEYMGMT_gen_settable_params() returns a constant B<OSSL_PARAM> array that
102 describes the names and types of key generation parameters that can be set via
103 L<EVP_PKEY_CTX_set_params(3)>.
107 EVP_KEYMGMT_fetch() may be called implicitly by other fetching
108 functions, using the same library context and properties.
109 Any other API that uses keys will typically do this.
113 EVP_KEYMGMT_fetch() returns a pointer to the key management
114 implementation represented by an EVP_KEYMGMT object, or NULL on
117 EVP_KEYMGMT_up_ref() returns 1 on success, or 0 on error.
119 EVP_KEYMGMT_names_do_all() returns 1 if the callback was called for all
120 names. A return value of 0 means that the callback was not called for any names.
122 EVP_KEYMGMT_free() doesn't return any value.
124 EVP_KEYMGMT_provider() returns a pointer to a provider object, or NULL
127 EVP_KEYMGMT_is_a() returns 1 of I<keymgmt> was identifiable,
130 EVP_KEYMGMT_number() returns an integer.
132 EVP_KEYMGMT_name() returns the algorithm name, or NULL on error.
134 EVP_KEYMGMT_description() returns a pointer to a decription, or NULL if
137 EVP_KEYMGMT_gettable_params(), EVP_KEYMGMT_settable_params() and
138 EVP_KEYMGMT_gen_settable_params() return a constant B<OSSL_PARAM> array or
143 L<EVP_MD_fetch(3)>, L<OSSL_LIB_CTX(3)>
147 The functions described here were added in OpenSSL 3.0.
151 Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
153 Licensed under the Apache License 2.0 (the "License"). You may not use
154 this file except in compliance with the License. You can obtain a copy
155 in the file LICENSE in the source distribution or at
156 L<https://www.openssl.org/source/license.html>.