2 * Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/core_dispatch.h>
11 #include <openssl/types.h>
12 #include <openssl/safestack.h>
13 #include <openssl/encoder.h>
14 #include <openssl/decoder.h>
15 #include "internal/cryptlib.h"
16 #include "internal/passphrase.h"
17 #include "internal/property.h"
18 #include "internal/refcount.h"
20 struct ossl_endecode_base_st {
24 const OSSL_ALGORITHM *algodef;
25 OSSL_PROPERTY_LIST *parsed_propdef;
27 CRYPTO_REF_COUNT refcnt;
31 struct ossl_encoder_st {
32 struct ossl_endecode_base_st base;
33 OSSL_FUNC_encoder_newctx_fn *newctx;
34 OSSL_FUNC_encoder_freectx_fn *freectx;
35 OSSL_FUNC_encoder_get_params_fn *get_params;
36 OSSL_FUNC_encoder_gettable_params_fn *gettable_params;
37 OSSL_FUNC_encoder_set_ctx_params_fn *set_ctx_params;
38 OSSL_FUNC_encoder_settable_ctx_params_fn *settable_ctx_params;
39 OSSL_FUNC_encoder_does_selection_fn *does_selection;
40 OSSL_FUNC_encoder_encode_fn *encode;
41 OSSL_FUNC_encoder_import_object_fn *import_object;
42 OSSL_FUNC_encoder_free_object_fn *free_object;
45 struct ossl_decoder_st {
46 struct ossl_endecode_base_st base;
47 OSSL_FUNC_decoder_newctx_fn *newctx;
48 OSSL_FUNC_decoder_freectx_fn *freectx;
49 OSSL_FUNC_decoder_get_params_fn *get_params;
50 OSSL_FUNC_decoder_gettable_params_fn *gettable_params;
51 OSSL_FUNC_decoder_set_ctx_params_fn *set_ctx_params;
52 OSSL_FUNC_decoder_settable_ctx_params_fn *settable_ctx_params;
53 OSSL_FUNC_decoder_does_selection_fn *does_selection;
54 OSSL_FUNC_decoder_decode_fn *decode;
55 OSSL_FUNC_decoder_export_object_fn *export_object;
58 struct ossl_encoder_instance_st {
59 OSSL_ENCODER *encoder; /* Never NULL */
60 void *encoderctx; /* Never NULL */
61 const char *output_type; /* Never NULL */
62 const char *output_structure; /* May be NULL */
65 DEFINE_STACK_OF(OSSL_ENCODER_INSTANCE)
67 void ossl_encoder_instance_free(OSSL_ENCODER_INSTANCE *encoder_inst);
69 struct ossl_encoder_ctx_st {
71 * Select what parts of an object will be encoded. This selection is
72 * bit encoded, and the bits correspond to selection bits available with
73 * the provider side operation. For example, when encoding an EVP_PKEY,
74 * the OSSL_KEYMGMT_SELECT_ macros are used for this.
78 * The desired output type. The encoder implementation must have a
79 * gettable "output-type" parameter that this will match against.
81 const char *output_type;
83 * The desired output structure, if that's relevant for the type of
84 * object being encoded. It may be used for selection of the starting
85 * encoder implementations in a chain.
87 const char *output_structure;
90 * Decoders that are components of any current decoding path.
92 STACK_OF(OSSL_ENCODER_INSTANCE) *encoder_insts;
95 * The constructor and destructor of an object to pass to the first
98 OSSL_ENCODER_CONSTRUCT *construct;
99 OSSL_ENCODER_CLEANUP *cleanup;
100 void *construct_data;
102 /* For any function that needs a passphrase reader */
103 struct ossl_passphrase_data_st pwdata;
106 struct ossl_decoder_instance_st {
107 OSSL_DECODER *decoder; /* Never NULL */
108 void *decoderctx; /* Never NULL */
109 const char *input_type; /* Never NULL */
110 const char *input_structure; /* May be NULL */
113 unsigned int flag_input_structure_was_set : 1;
116 DEFINE_STACK_OF(OSSL_DECODER_INSTANCE)
118 struct ossl_decoder_ctx_st {
120 * The caller may know the input type of the data they pass. If not,
121 * this will remain NULL and the decoding functionality will start
122 * with trying to decode with any desencoder in |decoder_insts|,
123 * regardless of their respective input type.
125 const char *start_input_type;
127 * The desired input structure, if that's relevant for the type of
128 * object being encoded. It may be used for selection of the ending
129 * decoder implementations in a chain, i.e. those chosen using the
130 * expected output data type.
132 const char *input_structure;
134 * Select what parts of an object are expected. This may affect what
135 * decoder implementations are selected, because there are structures
136 * that look different depending on this selection; for example, EVP_PKEY
137 * objects often have different encoding structures for private keys,
138 * public keys and key parameters.
139 * This selection is bit encoded, and the bits correspond to selection
140 * bits available with the provider side operation. For example, when
141 * encoding an EVP_PKEY, the OSSL_KEYMGMT_SELECT_ macros are used for
147 * Decoders that are components of any current decoding path.
149 STACK_OF(OSSL_DECODER_INSTANCE) *decoder_insts;
152 * The constructors of a decoding, and its caller argument.
154 OSSL_DECODER_CONSTRUCT *construct;
155 OSSL_DECODER_CLEANUP *cleanup;
156 void *construct_data;
158 /* For any function that needs a passphrase reader */
159 struct ossl_passphrase_data_st pwdata;
162 const OSSL_PROPERTY_LIST *
163 ossl_decoder_parsed_properties(const OSSL_DECODER *decoder);
164 const OSSL_PROPERTY_LIST *
165 ossl_encoder_parsed_properties(const OSSL_ENCODER *encoder);
167 int ossl_decoder_fast_is_a(OSSL_DECODER *decoder,
168 const char *name, int *id_cache);