providers/common/include/internal/provider_util.h

   1 /*
   2  * Copyright 2019 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 #include <openssl/provider.h>
  11 #include <openssl/engine.h>
  12
  13 typedef struct {
  14     /*
  15      * References to the underlying cipher implementation.  |cipher| caches
  16      * the cipher, always.  |alloc_cipher| only holds a reference to an
  17      * explicitly fetched cipher.
  18      */
  19     const EVP_CIPHER *cipher;   /* cipher */
  20     EVP_CIPHER *alloc_cipher;   /* fetched cipher */
  21
  22     /* Conditions for legacy EVP_CIPHER uses */
  23     ENGINE *engine;             /* cipher engine */
  24
  25     /* Name this was fetched by */
  26     char name[51];               /* A longer name would be unexpected */
  27 } PROV_CIPHER;
  28
  29 typedef struct {
  30     /*
  31      * References to the underlying digest implementation.  |md| caches
  32      * the digest, always.  |alloc_md| only holds a reference to an explicitly
  33      * fetched digest.
  34      */
  35     const EVP_MD *md;           /* digest */
  36     EVP_MD *alloc_md;           /* fetched digest */
  37
  38     /* Conditions for legacy EVP_MD uses */
  39     ENGINE *engine;             /* digest engine */
  40
  41     /* Name this was fetched by */
  42     char name[51];               /* A longer name would be unexpected */
  43 } PROV_DIGEST;
  44
  45 /* Cipher functions */
  46 /*
  47  * Load a cipher from the specified parameters with the specified context.
  48  * The params "properties", "engine" and "cipher" are used to determine the
  49  * implementation used.  If a provider cannot be found, it falls back to trying
  50  * non-provider based implementations.
  51  */
  52 int ossl_prov_cipher_load_from_params(PROV_CIPHER *pc,
  53                                       const OSSL_PARAM params[],
  54                                       OPENSSL_CTX *ctx);
  55
  56 /* Reset the PROV_CIPHER fields and free any allocated cipher reference */
  57 void ossl_prov_cipher_reset(PROV_CIPHER *pc);
  58
  59 /* Clone a PROV_CIPHER structure into a second */
  60 int ossl_prov_cipher_copy(PROV_CIPHER *dst, const PROV_CIPHER *src);
  61
  62 /* Query the cipher and associated engine (if any) */
  63 const EVP_CIPHER *ossl_prov_cipher_cipher(const PROV_CIPHER *pc);
  64 ENGINE *ossl_prov_cipher_engine(const PROV_CIPHER *pc);
  65 const char *ossl_prov_cipher_name(const PROV_CIPHER *pc);
  66
  67 /* Digest functions */
  68 /*
  69  * Load a digest from the specified parameters with the specified context.
  70  * The params "properties", "engine" and "digest" are used to determine the
  71  * implementation used.  If a provider cannot be found, it falls back to trying
  72  * non-provider based implementations.
  73  */
  74 int ossl_prov_digest_load_from_params(PROV_DIGEST *pd,
  75                                       const OSSL_PARAM params[],
  76                                       OPENSSL_CTX *ctx);
  77
  78 /* Reset the PROV_DIGEST fields and free any allocated digest reference */
  79 void ossl_prov_digest_reset(PROV_DIGEST *pd);
  80
  81 /* Clone a PROV_DIGEST structure into a second */
  82 int ossl_prov_digest_copy(PROV_DIGEST *dst, const PROV_DIGEST *src);
  83
  84 /* Query the digest and associated engine (if any) */
  85 const EVP_MD *ossl_prov_digest_md(const PROV_DIGEST *pd);
  86 ENGINE *ossl_prov_digest_engine(const PROV_DIGEST *pd);
  87 const char *ossl_prov_digest_name(const PROV_DIGEST *pd);