10 OSSL_ENCODER_properties,
14 OSSL_ENCODER_description,
15 OSSL_ENCODER_do_all_provided,
16 OSSL_ENCODER_names_do_all,
17 OSSL_ENCODER_gettable_params,
18 OSSL_ENCODER_get_params
19 - Encoder method routines
23 #include <openssl/encoder.h>
25 typedef struct ossl_encoder_st OSSL_ENCODER;
27 OSSL_ENCODER *OSSL_ENCODER_fetch(OSSL_LIB_CTX *ctx, const char *name,
28 const char *properties);
29 int OSSL_ENCODER_up_ref(OSSL_ENCODER *encoder);
30 void OSSL_ENCODER_free(OSSL_ENCODER *encoder);
31 const OSSL_PROVIDER *OSSL_ENCODER_provider(const OSSL_ENCODER *encoder);
32 const char *OSSL_ENCODER_properties(const OSSL_ENCODER *encoder);
33 int OSSL_ENCODER_is_a(const OSSL_ENCODER *encoder, const char *name);
34 int OSSL_ENCODER_number(const OSSL_ENCODER *encoder);
35 const char *OSSL_ENCODER_name(const OSSL_ENCODER *encoder);
36 const char *OSSL_ENCODER_description(const OSSL_ENCODER *encoder);
37 void OSSL_ENCODER_do_all_provided(OSSL_LIB_CTX *libctx,
38 void (*fn)(OSSL_ENCODER *encoder, void *arg),
40 int OSSL_ENCODER_names_do_all(const OSSL_ENCODER *encoder,
41 void (*fn)(const char *name, void *data),
43 const OSSL_PARAM *OSSL_ENCODER_gettable_params(OSSL_ENCODER *encoder);
44 int OSSL_ENCODER_get_params(OSSL_ENCODER_CTX *ctx, const OSSL_PARAM params[]);
48 B<OSSL_ENCODER> is a method for encoders, which know how to
49 encode an object of some kind to a encoded form, such as PEM,
50 DER, or even human readable text.
52 OSSL_ENCODER_fetch() looks for an algorithm within the provider that
53 has been loaded into the B<OSSL_LIB_CTX> given by I<ctx>, having the
54 name given by I<name> and the properties given by I<properties>.
55 The I<name> determines what type of object the fetched encoder
56 method is expected to be able to encode, and the properties are
57 used to determine the expected output type.
58 For known properties and the values they may have, please have a look
59 in L<provider-encoder(7)/Names and properties>.
61 OSSL_ENCODER_up_ref() increments the reference count for the given
64 OSSL_ENCODER_free() decrements the reference count for the given
65 I<encoder>, and when the count reaches zero, frees it.
67 OSSL_ENCODER_provider() returns the provider of the given
70 OSSL_ENCODER_properties() returns the property definition associated
71 with the given I<encoder>.
73 OSSL_ENCODER_is_a() checks if I<encoder> is an implementation of an
74 algorithm that's identifiable with I<name>.
76 OSSL_ENCODER_number() returns the internal dynamic number assigned to
79 OSSL_ENCODER_number() returns the name used to fetch the given I<encoder>.
81 OSSL_ENCODER_description() returns a description of the I<loader>, meant
82 for display and human consumption. The description is at the discretion of the
83 I<loader> implementation.
85 OSSL_ENCODER_names_do_all() traverses all names for the given
86 I<encoder>, and calls I<fn> with each name and I<data> as arguments.
88 OSSL_ENCODER_do_all_provided() traverses all encoder
89 implementations by all activated providers in the library context
90 I<libctx>, and for each of the implementations, calls I<fn> with the
91 implementation method and I<arg> as arguments.
93 OSSL_ENCODER_gettable_params() returns an L<OSSL_PARAM(3)>
94 array of parameter descriptors.
96 OSSL_ENCODER_get_params() attempts to get parameters specified
97 with an L<OSSL_PARAM(3)> array I<params>. Parameters that the
98 implementation doesn't recognise should be ignored.
102 OSSL_ENCODER_fetch() returns a pointer to the key management
103 implementation represented by an OSSL_ENCODER object, or NULL on
106 OSSL_ENCODER_up_ref() returns 1 on success, or 0 on error.
108 OSSL_ENCODER_free() doesn't return any value.
110 OSSL_ENCODER_provider() returns a pointer to a provider object, or
113 OSSL_ENCODER_properties() returns a pointer to a property
114 definition string, or NULL on error.
116 OSSL_ENCODER_is_a() returns 1 of I<encoder> was identifiable,
119 OSSL_ENCODER_number() returns an integer.
121 OSSL_ENCODER_name() returns the algorithm name from the provided
122 implementation for the given I<encoder>. Note that the I<encoder> may have
123 multiple synonyms associated with it. In this case the first name from the
124 algorithm definition is returned. Ownership of the returned string is retained
125 by the I<encoder> object and should not be freed by the caller.
127 OSSL_ENCODER_description() returns a pointer to a decription, or NULL if
130 OSSL_ENCODER_names_do_all() returns 1 if the callback was called for all
131 names. A return value of 0 means that the callback was not called for any names.
135 L<provider(7)>, L<OSSL_ENCODER_CTX(3)>, L<OSSL_ENCODER_to_bio(3)>,
136 L<OSSL_ENCODER_CTX_new_for_pkey(3)>, L<OSSL_LIB_CTX(3)>
140 The functions described here were added in OpenSSL 3.0.
144 Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
146 Licensed under the Apache License 2.0 (the "License"). You may not use
147 this file except in compliance with the License. You can obtain a copy
148 in the file LICENSE in the source distribution or at
149 L<https://www.openssl.org/source/license.html>.