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 {
23 const char *description;
25 CRYPTO_REF_COUNT refcnt;
29 struct ossl_encoder_st {
30 struct ossl_endecode_base_st base;
31 OSSL_FUNC_encoder_newctx_fn *newctx;
32 OSSL_FUNC_encoder_freectx_fn *freectx;
33 OSSL_FUNC_encoder_get_params_fn *get_params;
34 OSSL_FUNC_encoder_gettable_params_fn *gettable_params;
35 OSSL_FUNC_encoder_set_ctx_params_fn *set_ctx_params;
36 OSSL_FUNC_encoder_settable_ctx_params_fn *settable_ctx_params;
37 OSSL_FUNC_encoder_does_selection_fn *does_selection;
38 OSSL_FUNC_encoder_encode_fn *encode;
39 OSSL_FUNC_encoder_import_object_fn *import_object;
40 OSSL_FUNC_encoder_free_object_fn *free_object;
43 struct ossl_decoder_st {
44 struct ossl_endecode_base_st base;
45 OSSL_FUNC_decoder_newctx_fn *newctx;
46 OSSL_FUNC_decoder_freectx_fn *freectx;
47 OSSL_FUNC_decoder_get_params_fn *get_params;
48 OSSL_FUNC_decoder_gettable_params_fn *gettable_params;
49 OSSL_FUNC_decoder_set_ctx_params_fn *set_ctx_params;
50 OSSL_FUNC_decoder_settable_ctx_params_fn *settable_ctx_params;
51 OSSL_FUNC_decoder_does_selection_fn *does_selection;
52 OSSL_FUNC_decoder_decode_fn *decode;
53 OSSL_FUNC_decoder_export_object_fn *export_object;
56 struct ossl_encoder_instance_st {
57 OSSL_ENCODER *encoder; /* Never NULL */
58 void *encoderctx; /* Never NULL */
59 const char *input_type; /* May be NULL */
60 const char *output_type; /* Never NULL */
61 const char *output_structure; /* May be NULL */
64 DEFINE_STACK_OF(OSSL_ENCODER_INSTANCE)
66 void ossl_encoder_instance_free(OSSL_ENCODER_INSTANCE *encoder_inst);
68 struct ossl_encoder_ctx_st {
70 * Select what parts of an object will be encoded. This selection is
71 * bit encoded, and the bits correspond to selection bits available with
72 * the provider side operation. For example, when encoding an EVP_PKEY,
73 * the OSSL_KEYMGMT_SELECT_ macros are used for this.
77 * The desired output type. The encoder implementation must have a
78 * gettable "output-type" parameter that this will match against.
80 const char *output_type;
82 * The desired output structure, if that's relevant for the type of
83 * object being encoded. It may be used for selection of the starting
84 * encoder implementations in a chain.
86 const char *output_structure;
89 * Decoders that are components of any current decoding path.
91 STACK_OF(OSSL_ENCODER_INSTANCE) *encoder_insts;
94 * The constructor and destructor of an object to pass to the first
97 OSSL_ENCODER_CONSTRUCT *construct;
98 OSSL_ENCODER_CLEANUP *cleanup;
101 /* For any function that needs a passphrase reader */
102 struct ossl_passphrase_data_st pwdata;
105 struct ossl_decoder_instance_st {
106 OSSL_DECODER *decoder; /* Never NULL */
107 void *decoderctx; /* Never NULL */
108 const char *input_type; /* Never NULL */
109 const char *input_structure; /* May be NULL */
111 unsigned int flag_input_structure_was_set : 1;
114 DEFINE_STACK_OF(OSSL_DECODER_INSTANCE)
116 struct ossl_decoder_ctx_st {
118 * The caller may know the input type of the data they pass. If not,
119 * this will remain NULL and the decoding functionality will start
120 * with trying to decode with any desencoder in |decoder_insts|,
121 * regardless of their respective input type.
123 const char *start_input_type;
125 * The desired input structure, if that's relevant for the type of
126 * object being encoded. It may be used for selection of the ending
127 * decoder implementations in a chain, i.e. those chosen using the
128 * expected output data type.
130 const char *input_structure;
132 * Select what parts of an object are expected. This may affect what
133 * decoder implementations are selected, because there are structures
134 * that look different depending on this selection; for example, EVP_PKEY
135 * objects often have different encoding structures for private keys,
136 * public keys and key parameters.
137 * This selection is bit encoded, and the bits correspond to selection
138 * bits available with the provider side operation. For example, when
139 * encoding an EVP_PKEY, the OSSL_KEYMGMT_SELECT_ macros are used for
145 * Decoders that are components of any current decoding path.
147 STACK_OF(OSSL_DECODER_INSTANCE) *decoder_insts;
150 * The constructors of a decoding, and its caller argument.
152 OSSL_DECODER_CONSTRUCT *construct;
153 OSSL_DECODER_CLEANUP *cleanup;
154 void *construct_data;
156 /* For any function that needs a passphrase reader */
157 struct ossl_passphrase_data_st pwdata;