include/openssl/decoder.h

   1 /*
   2  * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   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
   8  */
   9
  10 #ifndef OPENSSL_DECODER_H
  11 # define OPENSSL_DECODER_H
  12 # pragma once
  13
  14 # include <openssl/opensslconf.h>
  15
  16 # ifndef OPENSSL_NO_STDIO
  17 #  include <stdio.h>
  18 # endif
  19 # include <stdarg.h>
  20 # include <stddef.h>
  21 # include <openssl/decodererr.h>
  22 # include <openssl/types.h>
  23 # include <openssl/core.h>
  24
  25 # ifdef __cplusplus
  26 extern "C" {
  27 # endif
  28
  29 OSSL_DECODER *OSSL_DECODER_fetch(OSSL_LIB_CTX *libctx, const char *name,
  30                                  const char *properties);
  31 int OSSL_DECODER_up_ref(OSSL_DECODER *encoder);
  32 void OSSL_DECODER_free(OSSL_DECODER *encoder);
  33
  34 const OSSL_PROVIDER *OSSL_DECODER_provider(const OSSL_DECODER *encoder);
  35 const char *OSSL_DECODER_properties(const OSSL_DECODER *encoder);
  36 int OSSL_DECODER_number(const OSSL_DECODER *encoder);
  37 int OSSL_DECODER_is_a(const OSSL_DECODER *encoder, const char *name);
  38
  39 void OSSL_DECODER_do_all_provided(OSSL_LIB_CTX *libctx,
  40                                   void (*fn)(OSSL_DECODER *encoder, void *arg),
  41                                   void *arg);
  42 int OSSL_DECODER_names_do_all(const OSSL_DECODER *encoder,
  43                               void (*fn)(const char *name, void *data),
  44                               void *data);
  45 const OSSL_PARAM *OSSL_DECODER_gettable_params(OSSL_DECODER *decoder);
  46 int OSSL_DECODER_get_params(OSSL_DECODER *decoder, OSSL_PARAM params[]);
  47
  48 const OSSL_PARAM *OSSL_DECODER_settable_ctx_params(OSSL_DECODER *encoder);
  49 OSSL_DECODER_CTX *OSSL_DECODER_CTX_new(void);
  50 int OSSL_DECODER_CTX_set_params(OSSL_DECODER_CTX *ctx,
  51                                 const OSSL_PARAM params[]);
  52 void OSSL_DECODER_CTX_free(OSSL_DECODER_CTX *ctx);
  53
  54 /* Utilities that help set specific parameters */
  55 int OSSL_DECODER_CTX_set_passphrase(OSSL_DECODER_CTX *ctx,
  56                                     const unsigned char *kstr, size_t klen);
  57 int OSSL_DECODER_CTX_set_pem_password_cb(OSSL_DECODER_CTX *ctx,
  58                                          pem_password_cb *cb, void *cbarg);
  59 int OSSL_DECODER_CTX_set_passphrase_cb(OSSL_DECODER_CTX *ctx,
  60                                        OSSL_PASSPHRASE_CALLBACK *cb,
  61                                        void *cbarg);
  62 int OSSL_DECODER_CTX_set_passphrase_ui(OSSL_DECODER_CTX *ctx,
  63                                        const UI_METHOD *ui_method,
  64                                        void *ui_data);
  65
  66 /*
  67  * Utilities to read the object to decode, with the result sent to cb.
  68  * These will discover all provided methods
  69  */
  70
  71 int OSSL_DECODER_CTX_set_selection(OSSL_DECODER_CTX *ctx, int selection);
  72 int OSSL_DECODER_CTX_set_input_type(OSSL_DECODER_CTX *ctx,
  73                                     const char *input_type);
  74 int OSSL_DECODER_CTX_set_input_structure(OSSL_DECODER_CTX *ctx,
  75                                          const char *input_structure);
  76 int OSSL_DECODER_CTX_add_decoder(OSSL_DECODER_CTX *ctx, OSSL_DECODER *decoder);
  77 int OSSL_DECODER_CTX_add_extra(OSSL_DECODER_CTX *ctx,
  78                                OSSL_LIB_CTX *libctx, const char *propq);
  79 int OSSL_DECODER_CTX_get_num_decoders(OSSL_DECODER_CTX *ctx);
  80
  81 typedef struct ossl_decoder_instance_st OSSL_DECODER_INSTANCE;
  82 OSSL_DECODER *
  83 OSSL_DECODER_INSTANCE_get_decoder(OSSL_DECODER_INSTANCE *decoder_inst);
  84 void *
  85 OSSL_DECODER_INSTANCE_get_decoder_ctx(OSSL_DECODER_INSTANCE *decoder_inst);
  86 const char *
  87 OSSL_DECODER_INSTANCE_get_input_type(OSSL_DECODER_INSTANCE *decoder_inst);
  88 const char *
  89 OSSL_DECODER_INSTANCE_get_input_structure(OSSL_DECODER_INSTANCE *decoder_inst,
  90                                           int *was_set);
  91
  92 typedef int OSSL_DECODER_CONSTRUCT(OSSL_DECODER_INSTANCE *decoder_inst,
  93                                    const OSSL_PARAM *params,
  94                                    void *construct_data);
  95 typedef void OSSL_DECODER_CLEANUP(void *construct_data);
  96
  97 int OSSL_DECODER_CTX_set_construct(OSSL_DECODER_CTX *ctx,
  98                                    OSSL_DECODER_CONSTRUCT *construct);
  99 int OSSL_DECODER_CTX_set_construct_data(OSSL_DECODER_CTX *ctx,
 100                                         void *construct_data);
 101 int OSSL_DECODER_CTX_set_cleanup(OSSL_DECODER_CTX *ctx,
 102                                  OSSL_DECODER_CLEANUP *cleanup);
 103 OSSL_DECODER_CONSTRUCT *OSSL_DECODER_CTX_get_construct(OSSL_DECODER_CTX *ctx);
 104 void *OSSL_DECODER_CTX_get_construct_data(OSSL_DECODER_CTX *ctx);
 105 OSSL_DECODER_CLEANUP *OSSL_DECODER_CTX_get_cleanup(OSSL_DECODER_CTX *ctx);
 106
 107 int OSSL_DECODER_export(OSSL_DECODER_INSTANCE *decoder_inst,
 108                         void *reference, size_t reference_sz,
 109                         OSSL_CALLBACK *export_cb, void *export_cbarg);
 110
 111 int OSSL_DECODER_from_bio(OSSL_DECODER_CTX *ctx, BIO *in);
 112 #ifndef OPENSSL_NO_STDIO
 113 int OSSL_DECODER_from_fp(OSSL_DECODER_CTX *ctx, FILE *in);
 114 #endif
 115 int OSSL_DECODER_from_data(OSSL_DECODER_CTX *ctx, const unsigned char **pdata,
 116                            size_t *pdata_len);
 117
 118 /*
 119  * Create the OSSL_DECODER_CTX with an associated type.  This will perform
 120  * an implicit OSSL_DECODER_fetch(), suitable for the object of that type.
 121  */
 122 OSSL_DECODER_CTX *
 123 OSSL_DECODER_CTX_new_for_pkey(EVP_PKEY **pkey,
 124                               const char *input_type,
 125                               const char *input_struct,
 126                               const char *keytype, int selection,
 127                               OSSL_LIB_CTX *libctx, const char *propquery);
 128
 129 # ifdef __cplusplus
 130 }
 131 # endif
 132 #endif