| 1 | /*
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| 2 | * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #ifndef OPENSSL_STORE_H
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| 11 | # define OPENSSL_STORE_H
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| 12 | # pragma once
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| 13 |
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| 14 | # include <openssl/macros.h>
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| 15 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 16 | # define HEADER_OSSL_STORE_H
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| 17 | # endif
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| 18 |
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| 19 | # include <stdarg.h>
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| 20 | # include <openssl/types.h>
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| 21 | # include <openssl/pem.h>
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| 22 | # include <openssl/storeerr.h>
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| 23 |
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| 24 | # ifdef __cplusplus
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| 25 | extern "C" {
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| 26 | # endif
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| 27 |
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| 28 | /*-
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| 29 | * The main OSSL_STORE functions.
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| 30 | * ------------------------------
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| 31 | *
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| 32 | * These allow applications to open a channel to a resource with supported
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| 33 | * data (keys, certs, crls, ...), read the data a piece at a time and decide
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| 34 | * what to do with it, and finally close.
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| 35 | */
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| 36 |
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| 37 | typedef struct ossl_store_ctx_st OSSL_STORE_CTX;
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| 38 |
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| 39 | /*
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| 40 | * Typedef for the OSSL_STORE_INFO post processing callback. This can be used
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| 41 | * to massage the given OSSL_STORE_INFO, or to drop it entirely (by returning
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| 42 | * NULL).
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| 43 | */
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| 44 | typedef OSSL_STORE_INFO *(*OSSL_STORE_post_process_info_fn)(OSSL_STORE_INFO *,
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| 45 | void *);
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| 46 |
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| 47 | /*
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| 48 | * Open a channel given a URI. The given UI method will be used any time the
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| 49 | * loader needs extra input, for example when a password or pin is needed, and
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| 50 | * will be passed the same user data every time it's needed in this context.
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| 51 | *
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| 52 | * Returns a context reference which represents the channel to communicate
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| 53 | * through.
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| 54 | */
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| 55 | OSSL_STORE_CTX *
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| 56 | OSSL_STORE_open(const char *uri, const UI_METHOD *ui_method, void *ui_data,
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| 57 | OSSL_STORE_post_process_info_fn post_process,
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| 58 | void *post_process_data);
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| 59 | OSSL_STORE_CTX *
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| 60 | OSSL_STORE_open_ex(const char *uri, OSSL_LIB_CTX *libctx, const char *propq,
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| 61 | const UI_METHOD *ui_method, void *ui_data,
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| 62 | const OSSL_PARAM params[],
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| 63 | OSSL_STORE_post_process_info_fn post_process,
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| 64 | void *post_process_data);
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| 65 |
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| 66 | /*
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| 67 | * Control / fine tune the OSSL_STORE channel. |cmd| determines what is to be
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| 68 | * done, and depends on the underlying loader (use OSSL_STORE_get0_scheme to
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| 69 | * determine which loader is used), except for common commands (see below).
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| 70 | * Each command takes different arguments.
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| 71 | */
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| 72 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 73 | OSSL_DEPRECATEDIN_3_0 int OSSL_STORE_ctrl(OSSL_STORE_CTX *ctx, int cmd,
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| 74 | ... /* args */);
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| 75 | OSSL_DEPRECATEDIN_3_0 int OSSL_STORE_vctrl(OSSL_STORE_CTX *ctx, int cmd,
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| 76 | va_list args);
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| 77 | # endif
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| 78 |
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| 79 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 80 |
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| 81 | /*
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| 82 | * Common ctrl commands that different loaders may choose to support.
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| 83 | */
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| 84 | /* int on = 0 or 1; STORE_ctrl(ctx, STORE_C_USE_SECMEM, &on); */
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| 85 | # define OSSL_STORE_C_USE_SECMEM 1
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| 86 | /* Where custom commands start */
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| 87 | # define OSSL_STORE_C_CUSTOM_START 100
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| 88 |
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| 89 | # endif
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| 90 |
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| 91 | /*
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| 92 | * Read one data item (a key, a cert, a CRL) that is supported by the OSSL_STORE
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| 93 | * functionality, given a context.
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| 94 | * Returns a OSSL_STORE_INFO pointer, from which OpenSSL typed data can be
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| 95 | * extracted with OSSL_STORE_INFO_get0_PKEY(), OSSL_STORE_INFO_get0_CERT(), ...
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| 96 | * NULL is returned on error, which may include that the data found at the URI
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| 97 | * can't be figured out for certain or is ambiguous.
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| 98 | */
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| 99 | OSSL_STORE_INFO *OSSL_STORE_load(OSSL_STORE_CTX *ctx);
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| 100 |
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| 101 | /*
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| 102 | * Check if end of data (end of file) is reached
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| 103 | * Returns 1 on end, 0 otherwise.
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| 104 | */
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| 105 | int OSSL_STORE_eof(OSSL_STORE_CTX *ctx);
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| 106 |
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| 107 | /*
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| 108 | * Check if an error occurred
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| 109 | * Returns 1 if it did, 0 otherwise.
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| 110 | */
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| 111 | int OSSL_STORE_error(OSSL_STORE_CTX *ctx);
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| 112 |
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| 113 | /*
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| 114 | * Close the channel
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| 115 | * Returns 1 on success, 0 on error.
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| 116 | */
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| 117 | int OSSL_STORE_close(OSSL_STORE_CTX *ctx);
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| 118 |
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| 119 | /*
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| 120 | * Attach to a BIO. This works like OSSL_STORE_open() except it takes a
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| 121 | * BIO instead of a uri, along with a scheme to use when reading.
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| 122 | * The given UI method will be used any time the loader needs extra input,
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| 123 | * for example when a password or pin is needed, and will be passed the
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| 124 | * same user data every time it's needed in this context.
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| 125 | *
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| 126 | * Returns a context reference which represents the channel to communicate
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| 127 | * through.
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| 128 | *
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| 129 | * Note that this function is considered unsafe, all depending on what the
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| 130 | * BIO actually reads.
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| 131 | */
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| 132 | OSSL_STORE_CTX *OSSL_STORE_attach(BIO *bio, const char *scheme,
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| 133 | OSSL_LIB_CTX *libctx, const char *propq,
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| 134 | const UI_METHOD *ui_method, void *ui_data,
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| 135 | const OSSL_PARAM params[],
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| 136 | OSSL_STORE_post_process_info_fn post_process,
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| 137 | void *post_process_data);
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| 138 |
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| 139 | /*-
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| 140 | * Extracting OpenSSL types from and creating new OSSL_STORE_INFOs
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| 141 | * ---------------------------------------------------------------
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| 142 | */
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| 143 |
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| 144 | /*
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| 145 | * Types of data that can be ossl_stored in a OSSL_STORE_INFO.
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| 146 | * OSSL_STORE_INFO_NAME is typically found when getting a listing of
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| 147 | * available "files" / "tokens" / what have you.
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| 148 | */
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| 149 | # define OSSL_STORE_INFO_NAME 1 /* char * */
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| 150 | # define OSSL_STORE_INFO_PARAMS 2 /* EVP_PKEY * */
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| 151 | # define OSSL_STORE_INFO_PUBKEY 3 /* EVP_PKEY * */
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| 152 | # define OSSL_STORE_INFO_PKEY 4 /* EVP_PKEY * */
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| 153 | # define OSSL_STORE_INFO_CERT 5 /* X509 * */
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| 154 | # define OSSL_STORE_INFO_CRL 6 /* X509_CRL * */
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| 155 |
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| 156 | /*
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| 157 | * Functions to generate OSSL_STORE_INFOs, one function for each type we
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| 158 | * support having in them, as well as a generic constructor.
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| 159 | *
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| 160 | * In all cases, ownership of the object is transferred to the OSSL_STORE_INFO
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| 161 | * and will therefore be freed when the OSSL_STORE_INFO is freed.
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| 162 | */
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| 163 | OSSL_STORE_INFO *OSSL_STORE_INFO_new(int type, void *data);
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| 164 | OSSL_STORE_INFO *OSSL_STORE_INFO_new_NAME(char *name);
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| 165 | int OSSL_STORE_INFO_set0_NAME_description(OSSL_STORE_INFO *info, char *desc);
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| 166 | OSSL_STORE_INFO *OSSL_STORE_INFO_new_PARAMS(EVP_PKEY *params);
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| 167 | OSSL_STORE_INFO *OSSL_STORE_INFO_new_PUBKEY(EVP_PKEY *pubkey);
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| 168 | OSSL_STORE_INFO *OSSL_STORE_INFO_new_PKEY(EVP_PKEY *pkey);
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| 169 | OSSL_STORE_INFO *OSSL_STORE_INFO_new_CERT(X509 *x509);
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| 170 | OSSL_STORE_INFO *OSSL_STORE_INFO_new_CRL(X509_CRL *crl);
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| 171 |
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| 172 | /*
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| 173 | * Functions to try to extract data from a OSSL_STORE_INFO.
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| 174 | */
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| 175 | int OSSL_STORE_INFO_get_type(const OSSL_STORE_INFO *info);
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| 176 | void *OSSL_STORE_INFO_get0_data(int type, const OSSL_STORE_INFO *info);
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| 177 | const char *OSSL_STORE_INFO_get0_NAME(const OSSL_STORE_INFO *info);
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| 178 | char *OSSL_STORE_INFO_get1_NAME(const OSSL_STORE_INFO *info);
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| 179 | const char *OSSL_STORE_INFO_get0_NAME_description(const OSSL_STORE_INFO *info);
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| 180 | char *OSSL_STORE_INFO_get1_NAME_description(const OSSL_STORE_INFO *info);
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| 181 | EVP_PKEY *OSSL_STORE_INFO_get0_PARAMS(const OSSL_STORE_INFO *info);
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| 182 | EVP_PKEY *OSSL_STORE_INFO_get1_PARAMS(const OSSL_STORE_INFO *info);
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| 183 | EVP_PKEY *OSSL_STORE_INFO_get0_PUBKEY(const OSSL_STORE_INFO *info);
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| 184 | EVP_PKEY *OSSL_STORE_INFO_get1_PUBKEY(const OSSL_STORE_INFO *info);
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| 185 | EVP_PKEY *OSSL_STORE_INFO_get0_PKEY(const OSSL_STORE_INFO *info);
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| 186 | EVP_PKEY *OSSL_STORE_INFO_get1_PKEY(const OSSL_STORE_INFO *info);
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| 187 | X509 *OSSL_STORE_INFO_get0_CERT(const OSSL_STORE_INFO *info);
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| 188 | X509 *OSSL_STORE_INFO_get1_CERT(const OSSL_STORE_INFO *info);
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| 189 | X509_CRL *OSSL_STORE_INFO_get0_CRL(const OSSL_STORE_INFO *info);
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| 190 | X509_CRL *OSSL_STORE_INFO_get1_CRL(const OSSL_STORE_INFO *info);
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| 191 |
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| 192 | const char *OSSL_STORE_INFO_type_string(int type);
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| 193 |
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| 194 | /*
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| 195 | * Free the OSSL_STORE_INFO
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| 196 | */
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| 197 | void OSSL_STORE_INFO_free(OSSL_STORE_INFO *info);
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| 198 |
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| 199 |
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| 200 | /*-
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| 201 | * Functions to construct a search URI from a base URI and search criteria
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| 202 | * -----------------------------------------------------------------------
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| 203 | */
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| 204 |
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| 205 | /* OSSL_STORE search types */
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| 206 | # define OSSL_STORE_SEARCH_BY_NAME 1 /* subject in certs, issuer in CRLs */
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| 207 | # define OSSL_STORE_SEARCH_BY_ISSUER_SERIAL 2
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| 208 | # define OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT 3
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| 209 | # define OSSL_STORE_SEARCH_BY_ALIAS 4
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| 210 |
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| 211 | /* To check what search types the scheme handler supports */
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| 212 | int OSSL_STORE_supports_search(OSSL_STORE_CTX *ctx, int search_type);
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| 213 |
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| 214 | /* Search term constructors */
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| 215 | /*
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| 216 | * The input is considered to be owned by the caller, and must therefore
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| 217 | * remain present throughout the lifetime of the returned OSSL_STORE_SEARCH
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| 218 | */
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| 219 | OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_name(X509_NAME *name);
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| 220 | OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_issuer_serial(X509_NAME *name,
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| 221 | const ASN1_INTEGER
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| 222 | *serial);
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| 223 | OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_key_fingerprint(const EVP_MD *digest,
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| 224 | const unsigned char
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| 225 | *bytes, size_t len);
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| 226 | OSSL_STORE_SEARCH *OSSL_STORE_SEARCH_by_alias(const char *alias);
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| 227 |
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| 228 | /* Search term destructor */
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| 229 | void OSSL_STORE_SEARCH_free(OSSL_STORE_SEARCH *search);
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| 230 |
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| 231 | /* Search term accessors */
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| 232 | int OSSL_STORE_SEARCH_get_type(const OSSL_STORE_SEARCH *criterion);
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| 233 | X509_NAME *OSSL_STORE_SEARCH_get0_name(const OSSL_STORE_SEARCH *criterion);
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| 234 | const ASN1_INTEGER *OSSL_STORE_SEARCH_get0_serial(const OSSL_STORE_SEARCH
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| 235 | *criterion);
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| 236 | const unsigned char *OSSL_STORE_SEARCH_get0_bytes(const OSSL_STORE_SEARCH
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| 237 | *criterion, size_t *length);
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| 238 | const char *OSSL_STORE_SEARCH_get0_string(const OSSL_STORE_SEARCH *criterion);
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| 239 | const EVP_MD *OSSL_STORE_SEARCH_get0_digest(const OSSL_STORE_SEARCH *criterion);
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| 240 |
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| 241 | /*
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| 242 | * Add search criterion and expected return type (which can be unspecified)
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| 243 | * to the loading channel. This MUST happen before the first OSSL_STORE_load().
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| 244 | */
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| 245 | int OSSL_STORE_expect(OSSL_STORE_CTX *ctx, int expected_type);
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| 246 | int OSSL_STORE_find(OSSL_STORE_CTX *ctx, const OSSL_STORE_SEARCH *search);
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| 247 |
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| 248 |
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| 249 | /*-
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| 250 | * Function to fetch a loader and extract data from it
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| 251 | * ---------------------------------------------------
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| 252 | */
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| 253 |
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| 254 | typedef struct ossl_store_loader_st OSSL_STORE_LOADER;
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| 255 |
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| 256 | OSSL_STORE_LOADER *OSSL_STORE_LOADER_fetch(OSSL_LIB_CTX *libctx,
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| 257 | const char *scheme,
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| 258 | const char *properties);
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| 259 | int OSSL_STORE_LOADER_up_ref(OSSL_STORE_LOADER *loader);
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| 260 | void OSSL_STORE_LOADER_free(OSSL_STORE_LOADER *loader);
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| 261 | const OSSL_PROVIDER *OSSL_STORE_LOADER_get0_provider(const OSSL_STORE_LOADER *
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| 262 | loader);
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| 263 | const char *OSSL_STORE_LOADER_get0_properties(const OSSL_STORE_LOADER *loader);
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| 264 | const char *OSSL_STORE_LOADER_get0_description(const OSSL_STORE_LOADER *loader);
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| 265 | int OSSL_STORE_LOADER_is_a(const OSSL_STORE_LOADER *loader,
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| 266 | const char *scheme);
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| 267 | void OSSL_STORE_LOADER_do_all_provided(OSSL_LIB_CTX *libctx,
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| 268 | void (*fn)(OSSL_STORE_LOADER *loader,
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| 269 | void *arg),
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| 270 | void *arg);
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| 271 | int OSSL_STORE_LOADER_names_do_all(const OSSL_STORE_LOADER *loader,
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| 272 | void (*fn)(const char *name, void *data),
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| 273 | void *data);
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| 274 |
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| 275 | /*-
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| 276 | * Function to register a loader for the given URI scheme.
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| 277 | * -------------------------------------------------------
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| 278 | *
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| 279 | * The loader receives all the main components of an URI except for the
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| 280 | * scheme.
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| 281 | */
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| 282 |
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| 283 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 284 |
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| 285 | /* struct ossl_store_loader_ctx_st is defined differently by each loader */
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| 286 | typedef struct ossl_store_loader_ctx_st OSSL_STORE_LOADER_CTX;
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| 287 | typedef OSSL_STORE_LOADER_CTX *(*OSSL_STORE_open_fn)
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| 288 | (const OSSL_STORE_LOADER *loader, const char *uri,
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| 289 | const UI_METHOD *ui_method, void *ui_data);
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| 290 | typedef OSSL_STORE_LOADER_CTX *(*OSSL_STORE_open_ex_fn)
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| 291 | (const OSSL_STORE_LOADER *loader,
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| 292 | const char *uri, OSSL_LIB_CTX *libctx, const char *propq,
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| 293 | const UI_METHOD *ui_method, void *ui_data);
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| 294 |
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| 295 | typedef OSSL_STORE_LOADER_CTX *(*OSSL_STORE_attach_fn)
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| 296 | (const OSSL_STORE_LOADER *loader, BIO *bio,
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| 297 | OSSL_LIB_CTX *libctx, const char *propq,
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| 298 | const UI_METHOD *ui_method, void *ui_data);
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| 299 | typedef int (*OSSL_STORE_ctrl_fn)
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| 300 | (OSSL_STORE_LOADER_CTX *ctx, int cmd, va_list args);
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| 301 | typedef int (*OSSL_STORE_expect_fn)
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| 302 | (OSSL_STORE_LOADER_CTX *ctx, int expected);
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| 303 | typedef int (*OSSL_STORE_find_fn)
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| 304 | (OSSL_STORE_LOADER_CTX *ctx, const OSSL_STORE_SEARCH *criteria);
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| 305 | typedef OSSL_STORE_INFO *(*OSSL_STORE_load_fn)
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| 306 | (OSSL_STORE_LOADER_CTX *ctx, const UI_METHOD *ui_method, void *ui_data);
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| 307 | typedef int (*OSSL_STORE_eof_fn)(OSSL_STORE_LOADER_CTX *ctx);
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| 308 | typedef int (*OSSL_STORE_error_fn)(OSSL_STORE_LOADER_CTX *ctx);
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| 309 | typedef int (*OSSL_STORE_close_fn)(OSSL_STORE_LOADER_CTX *ctx);
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| 310 |
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| 311 | # endif
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| 312 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 313 | OSSL_DEPRECATEDIN_3_0
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| 314 | OSSL_STORE_LOADER *OSSL_STORE_LOADER_new(ENGINE *e, const char *scheme);
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| 315 | OSSL_DEPRECATEDIN_3_0
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| 316 | int OSSL_STORE_LOADER_set_open(OSSL_STORE_LOADER *loader,
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| 317 | OSSL_STORE_open_fn open_function);
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| 318 | OSSL_DEPRECATEDIN_3_0
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| 319 | int OSSL_STORE_LOADER_set_open_ex(OSSL_STORE_LOADER *loader,
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| 320 | OSSL_STORE_open_ex_fn open_ex_function);
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| 321 | OSSL_DEPRECATEDIN_3_0
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| 322 | int OSSL_STORE_LOADER_set_attach(OSSL_STORE_LOADER *loader,
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| 323 | OSSL_STORE_attach_fn attach_function);
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| 324 | OSSL_DEPRECATEDIN_3_0
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| 325 | int OSSL_STORE_LOADER_set_ctrl(OSSL_STORE_LOADER *loader,
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| 326 | OSSL_STORE_ctrl_fn ctrl_function);
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| 327 | OSSL_DEPRECATEDIN_3_0
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| 328 | int OSSL_STORE_LOADER_set_expect(OSSL_STORE_LOADER *loader,
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| 329 | OSSL_STORE_expect_fn expect_function);
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| 330 | OSSL_DEPRECATEDIN_3_0
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| 331 | int OSSL_STORE_LOADER_set_find(OSSL_STORE_LOADER *loader,
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| 332 | OSSL_STORE_find_fn find_function);
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| 333 | OSSL_DEPRECATEDIN_3_0
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| 334 | int OSSL_STORE_LOADER_set_load(OSSL_STORE_LOADER *loader,
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| 335 | OSSL_STORE_load_fn load_function);
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| 336 | OSSL_DEPRECATEDIN_3_0
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| 337 | int OSSL_STORE_LOADER_set_eof(OSSL_STORE_LOADER *loader,
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| 338 | OSSL_STORE_eof_fn eof_function);
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| 339 | OSSL_DEPRECATEDIN_3_0
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| 340 | int OSSL_STORE_LOADER_set_error(OSSL_STORE_LOADER *loader,
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| 341 | OSSL_STORE_error_fn error_function);
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| 342 | OSSL_DEPRECATEDIN_3_0
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| 343 | int OSSL_STORE_LOADER_set_close(OSSL_STORE_LOADER *loader,
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| 344 | OSSL_STORE_close_fn close_function);
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| 345 | OSSL_DEPRECATEDIN_3_0
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| 346 | const ENGINE *OSSL_STORE_LOADER_get0_engine(const OSSL_STORE_LOADER *loader);
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| 347 | OSSL_DEPRECATEDIN_3_0
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| 348 | const char * OSSL_STORE_LOADER_get0_scheme(const OSSL_STORE_LOADER *loader);
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| 349 | OSSL_DEPRECATEDIN_3_0
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| 350 | int OSSL_STORE_register_loader(OSSL_STORE_LOADER *loader);
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| 351 | OSSL_DEPRECATEDIN_3_0
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| 352 | OSSL_STORE_LOADER *OSSL_STORE_unregister_loader(const char *scheme);
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| 353 | # endif
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| 354 |
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| 355 | /*-
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| 356 | * Functions to list STORE loaders
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| 357 | * -------------------------------
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| 358 | */
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| 359 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 360 | OSSL_DEPRECATEDIN_3_0
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| 361 | int OSSL_STORE_do_all_loaders(void (*do_function)(const OSSL_STORE_LOADER *loader,
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| 362 | void *do_arg),
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| 363 | void *do_arg);
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| 364 | # endif
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| 365 |
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| 366 | # ifdef __cplusplus
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| 367 | }
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| 368 | # endif
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| 369 | #endif
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