include/openssl/encoder.h

   1 /*
   2  * Copyright 2019-2021 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_ENCODER_H
  11 # define OPENSSL_ENCODER_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/encodererr.h>
  22 # include <openssl/types.h>
  23 # include <openssl/core.h>
  24
  25 # ifdef __cplusplus
  26 extern "C" {
  27 # endif
  28
  29 OSSL_ENCODER *OSSL_ENCODER_fetch(OSSL_LIB_CTX *libctx, const char *name,
  30                                  const char *properties);
  31 int OSSL_ENCODER_up_ref(OSSL_ENCODER *encoder);
  32 void OSSL_ENCODER_free(OSSL_ENCODER *encoder);
  33
  34 const OSSL_PROVIDER *OSSL_ENCODER_provider(const OSSL_ENCODER *encoder);
  35 const char *OSSL_ENCODER_properties(const OSSL_ENCODER *encoder);
  36 int OSSL_ENCODER_number(const OSSL_ENCODER *encoder);
  37 int OSSL_ENCODER_is_a(const OSSL_ENCODER *encoder, const char *name);
  38
  39 void OSSL_ENCODER_do_all_provided(OSSL_LIB_CTX *libctx,
  40                                   void (*fn)(OSSL_ENCODER *encoder, void *arg),
  41                                   void *arg);
  42 int OSSL_ENCODER_names_do_all(const OSSL_ENCODER *encoder,
  43                               void (*fn)(const char *name, void *data),
  44                               void *data);
  45 const OSSL_PARAM *OSSL_ENCODER_gettable_params(OSSL_ENCODER *encoder);
  46 int OSSL_ENCODER_get_params(OSSL_ENCODER *encoder, OSSL_PARAM params[]);
  47
  48 const OSSL_PARAM *OSSL_ENCODER_settable_ctx_params(OSSL_ENCODER *encoder);
  49 OSSL_ENCODER_CTX *OSSL_ENCODER_CTX_new(void);
  50 int OSSL_ENCODER_CTX_set_params(OSSL_ENCODER_CTX *ctx,
  51                                 const OSSL_PARAM params[]);
  52 void OSSL_ENCODER_CTX_free(OSSL_ENCODER_CTX *ctx);
  53
  54 /* Utilities that help set specific parameters */
  55 int OSSL_ENCODER_CTX_set_passphrase(OSSL_ENCODER_CTX *ctx,
  56                                     const unsigned char *kstr, size_t klen);
  57 int OSSL_ENCODER_CTX_set_pem_password_cb(OSSL_ENCODER_CTX *ctx,
  58                                          pem_password_cb *cb, void *cbarg);
  59 int OSSL_ENCODER_CTX_set_passphrase_cb(OSSL_ENCODER_CTX *ctx,
  60                                        OSSL_PASSPHRASE_CALLBACK *cb,
  61                                        void *cbarg);
  62 int OSSL_ENCODER_CTX_set_passphrase_ui(OSSL_ENCODER_CTX *ctx,
  63                                        const UI_METHOD *ui_method,
  64                                        void *ui_data);
  65 int OSSL_ENCODER_CTX_set_cipher(OSSL_ENCODER_CTX *ctx,
  66                                 const char *cipher_name,
  67                                 const char *propquery);
  68 int OSSL_ENCODER_CTX_set_selection(OSSL_ENCODER_CTX *ctx, int selection);
  69 int OSSL_ENCODER_CTX_set_output_type(OSSL_ENCODER_CTX *ctx,
  70                                      const char *output_type);
  71 int OSSL_ENCODER_CTX_set_output_structure(OSSL_ENCODER_CTX *ctx,
  72                                           const char *output_structure);
  73
  74 /* Utilities to add encoders */
  75 int OSSL_ENCODER_CTX_add_encoder(OSSL_ENCODER_CTX *ctx, OSSL_ENCODER *encoder);
  76 int OSSL_ENCODER_CTX_add_extra(OSSL_ENCODER_CTX *ctx,
  77                                OSSL_LIB_CTX *libctx, const char *propq);
  78 int OSSL_ENCODER_CTX_get_num_encoders(OSSL_ENCODER_CTX *ctx);
  79
  80 typedef struct ossl_encoder_instance_st OSSL_ENCODER_INSTANCE;
  81 OSSL_ENCODER *
  82 OSSL_ENCODER_INSTANCE_get_encoder(OSSL_ENCODER_INSTANCE *encoder_inst);
  83 void *
  84 OSSL_ENCODER_INSTANCE_get_encoder_ctx(OSSL_ENCODER_INSTANCE *encoder_inst);
  85 const char *
  86 OSSL_ENCODER_INSTANCE_get_input_type(OSSL_ENCODER_INSTANCE *encoder_inst);
  87 const char *
  88 OSSL_ENCODER_INSTANCE_get_output_type(OSSL_ENCODER_INSTANCE *encoder_inst);
  89 const char *
  90 OSSL_ENCODER_INSTANCE_get_output_structure(OSSL_ENCODER_INSTANCE *encoder_inst);
  91
  92 typedef const void *OSSL_ENCODER_CONSTRUCT(OSSL_ENCODER_INSTANCE *encoder_inst,
  93                                            void *construct_data);
  94 typedef void OSSL_ENCODER_CLEANUP(void *construct_data);
  95
  96 int OSSL_ENCODER_CTX_set_construct(OSSL_ENCODER_CTX *ctx,
  97                                    OSSL_ENCODER_CONSTRUCT *construct);
  98 int OSSL_ENCODER_CTX_set_construct_data(OSSL_ENCODER_CTX *ctx,
  99                                         void *construct_data);
 100 int OSSL_ENCODER_CTX_set_cleanup(OSSL_ENCODER_CTX *ctx,
 101                                  OSSL_ENCODER_CLEANUP *cleanup);
 102
 103 /* Utilities to output the object to encode */
 104 int OSSL_ENCODER_to_bio(OSSL_ENCODER_CTX *ctx, BIO *out);
 105 #ifndef OPENSSL_NO_STDIO
 106 int OSSL_ENCODER_to_fp(OSSL_ENCODER_CTX *ctx, FILE *fp);
 107 #endif
 108 int OSSL_ENCODER_to_data(OSSL_ENCODER_CTX *ctx, unsigned char **pdata,
 109                          size_t *pdata_len);
 110
 111 /*
 112  * Create the OSSL_ENCODER_CTX with an associated type.  This will perform
 113  * an implicit OSSL_ENCODER_fetch(), suitable for the object of that type.
 114  * This is more useful than calling OSSL_ENCODER_CTX_new().
 115  */
 116 OSSL_ENCODER_CTX *OSSL_ENCODER_CTX_new_for_pkey(const EVP_PKEY *pkey,
 117                                                 int selection,
 118                                                 const char *output_type,
 119                                                 const char *output_struct,
 120                                                 const char *propquery);
 121
 122 # ifdef __cplusplus
 123 }
 124 # endif
 125 #endif