2 * Copyright 2019-2020 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/refcount.h"
19 struct ossl_endecode_base_st {
24 CRYPTO_REF_COUNT refcnt;
28 struct ossl_encoder_st {
29 struct ossl_endecode_base_st base;
30 OSSL_FUNC_encoder_newctx_fn *newctx;
31 OSSL_FUNC_encoder_freectx_fn *freectx;
32 OSSL_FUNC_encoder_get_params_fn *get_params;
33 OSSL_FUNC_encoder_gettable_params_fn *gettable_params;
34 OSSL_FUNC_encoder_set_ctx_params_fn *set_ctx_params;
35 OSSL_FUNC_encoder_settable_ctx_params_fn *settable_ctx_params;
36 OSSL_FUNC_encoder_encode_fn *encode;
37 OSSL_FUNC_encoder_import_object_fn *import_object;
38 OSSL_FUNC_encoder_free_object_fn *free_object;
41 struct ossl_decoder_st {
42 struct ossl_endecode_base_st base;
43 OSSL_FUNC_decoder_newctx_fn *newctx;
44 OSSL_FUNC_decoder_freectx_fn *freectx;
45 OSSL_FUNC_decoder_get_params_fn *get_params;
46 OSSL_FUNC_decoder_gettable_params_fn *gettable_params;
47 OSSL_FUNC_decoder_set_ctx_params_fn *set_ctx_params;
48 OSSL_FUNC_decoder_settable_ctx_params_fn *settable_ctx_params;
49 OSSL_FUNC_decoder_does_selection_fn *does_selection;
50 OSSL_FUNC_decoder_decode_fn *decode;
51 OSSL_FUNC_decoder_export_object_fn *export_object;
54 struct ossl_encoder_instance_st {
55 OSSL_ENCODER *encoder; /* Never NULL */
56 void *encoderctx; /* Never NULL */
57 const char *input_type; /* May be NULL */
58 const char *output_type; /* Never NULL */
61 DEFINE_STACK_OF(OSSL_ENCODER_INSTANCE)
63 void ossl_encoder_instance_free(OSSL_ENCODER_INSTANCE *encoder_inst);
65 struct ossl_encoder_ctx_st {
67 * The desired output type. The encoder implementation have a gettable
68 * "output-type" parameter that this will match against.
70 const char *output_type;
72 * Select what parts of an object will be encoded. This selection is
73 * bit encoded, and the bits correspond to selection bits available with
74 * the provider side operation. For example, when encoding an EVP_PKEY,
75 * the OSSL_KEYMGMT_SELECT_ macros are used for this.
80 * Decoders that are components of any current decoding path.
82 STACK_OF(OSSL_ENCODER_INSTANCE) *encoder_insts;
85 * The constructor and destructor of an object to pass to the first
88 OSSL_ENCODER_CONSTRUCT *construct;
89 OSSL_ENCODER_CLEANUP *cleanup;
92 /* For any function that needs a passphrase reader */
93 struct ossl_passphrase_data_st pwdata;
96 struct ossl_decoder_instance_st {
97 OSSL_DECODER *decoder; /* Never NULL */
98 void *decoderctx; /* Never NULL */
99 const char *input_type; /* Never NULL */
100 const char *input_structure; /* May be NULL */
102 unsigned int flag_input_structure_was_set : 1;
105 DEFINE_STACK_OF(OSSL_DECODER_INSTANCE)
107 struct ossl_decoder_ctx_st {
109 * The caller may know the input type of the data they pass. If not,
110 * this will remain NULL and the decoding functionality will start
111 * with trying to decode with any desencoder in |decoder_insts|,
112 * regardless of their respective input type.
114 const char *start_input_type;
116 * The desired input structure, if that's relevant for the type of
117 * object being encoded. It may be used for selection of the ending
118 * decoder implementations in a chain, i.e. those chosen using the
119 * expected output data type.
121 const char *input_structure;
123 * Select what parts of an object are expected. This may affect what
124 * decoder implementations are selected, because there are structures
125 * that look different depending on this selection; for example, EVP_PKEY
126 * objects often have different encoding structures for private keys,
127 * public keys and key parameters.
128 * This selection is bit encoded, and the bits correspond to selection
129 * bits available with the provider side operation. For example, when
130 * encoding an EVP_PKEY, the OSSL_KEYMGMT_SELECT_ macros are used for
136 * Decoders that are components of any current decoding path.
138 STACK_OF(OSSL_DECODER_INSTANCE) *decoder_insts;
141 * The constructors of a decoding, and its caller argument.
143 OSSL_DECODER_CONSTRUCT *construct;
144 OSSL_DECODER_CLEANUP *cleanup;
145 void *construct_data;
147 /* For any function that needs a passphrase reader */
148 struct ossl_passphrase_data_st pwdata;