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OSSL_STORE(7ossl) OpenSSL OSSL_STORE(7ossl)

ossl_store - Store retrieval functions

#include <openssl/store.h>

A STORE is a layer of functionality to retrieve a number of supported objects from a repository of any kind, addressable as a filename or as a URI.

The functionality supports the pattern "open a channel to the repository", "loop and retrieve one object at a time", and "finish up by closing the channel".

The retrieved objects are returned as a wrapper type OSSL_STORE_INFO, from which an OpenSSL type can be retrieved.

Support for a URI scheme is called a STORE "loader", and can be added dynamically from the calling application or from a loadable engine.

Support for the 'file' scheme is built into "libcrypto". See ossl_store-file(7) for more information.

The OSS_STORE API does nothing to enforce any specific format or encoding on the pass phrase that the UI_METHOD provides. However, the pass phrase is expected to be UTF-8 encoded. The result of any other encoding is undefined.

 OSSL_STORE_CTX *ctx = OSSL_STORE_open("file:/foo/bar/data.pem");

 /*
  * OSSL_STORE_eof() simulates file semantics for any repository to signal
  * that no more data can be expected
  */
 while (!OSSL_STORE_eof(ctx)) {
     OSSL_STORE_INFO *info = OSSL_STORE_load(ctx);

     /*
      * Do whatever is necessary with the OSSL_STORE_INFO,
      * here just one example
      */
     switch (OSSL_STORE_INFO_get_type(info)) {
     case OSSL_STORE_INFO_CERT:
         /* Print the X.509 certificate text */
         X509_print_fp(stdout, OSSL_STORE_INFO_get0_CERT(info));
         /* Print the X.509 certificate PEM output */
         PEM_write_X509(stdout, OSSL_STORE_INFO_get0_CERT(info));
         break;
     }
 }

 OSSL_STORE_close(ctx);

OSSL_STORE_INFO(3), OSSL_STORE_LOADER(3), OSSL_STORE_open(3), OSSL_STORE_expect(3), OSSL_STORE_SEARCH(3)

Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.

2022-05-03 3.0.3

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