providers/implementations/include/prov/digestcommon.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 #ifndef OSSL_PROVIDERS_DIGESTCOMMON_H
  11 # define OSSL_PROVIDERS_DIGESTCOMMON_H
  12
  13 # include <openssl/core_dispatch.h>
  14 # include <openssl/core_names.h>
  15 # include <openssl/params.h>
  16
  17 # ifdef __cplusplus
  18 extern "C" {
  19 # endif
  20
  21 #define PROV_FUNC_DIGEST_GET_PARAM(name, blksize, dgstsize, flags)             \
  22 static OSSL_FUNC_digest_get_params_fn name##_get_params;                         \
  23 static int name##_get_params(OSSL_PARAM params[])                              \
  24 {                                                                              \
  25     return digest_default_get_params(params, blksize, dgstsize, flags);        \
  26 }
  27
  28 #define PROV_DISPATCH_FUNC_DIGEST_GET_PARAMS(name)                             \
  29 { OSSL_FUNC_DIGEST_GET_PARAMS, (void (*)(void))name##_get_params },            \
  30 { OSSL_FUNC_DIGEST_GETTABLE_PARAMS,                                            \
  31   (void (*)(void))digest_default_gettable_params }
  32
  33 # define PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_START(                            \
  34     name, CTX, blksize, dgstsize, flags, init, upd, fin)                       \
  35 static OSSL_FUNC_digest_newctx_fn name##_newctx;                                 \
  36 static OSSL_FUNC_digest_freectx_fn name##_freectx;                               \
  37 static OSSL_FUNC_digest_dupctx_fn name##_dupctx;                                 \
  38 static void *name##_newctx(void *prov_ctx)                                     \
  39 {                                                                              \
  40     CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));                                   \
  41     return ctx;                                                                \
  42 }                                                                              \
  43 static void name##_freectx(void *vctx)                                         \
  44 {                                                                              \
  45     CTX *ctx = (CTX *)vctx;                                                    \
  46     OPENSSL_clear_free(ctx,  sizeof(*ctx));                                    \
  47 }                                                                              \
  48 static void *name##_dupctx(void *ctx)                                          \
  49 {                                                                              \
  50     CTX *in = (CTX *)ctx;                                                      \
  51     CTX *ret = OPENSSL_malloc(sizeof(*ret));                                   \
  52     if (ret != NULL)                                                           \
  53         *ret = *in;                                                            \
  54     return ret;                                                                \
  55 }                                                                              \
  56 static OSSL_FUNC_digest_final_fn name##_internal_final;                          \
  57 static int name##_internal_final(void *ctx, unsigned char *out, size_t *outl,  \
  58                                  size_t outsz)                                 \
  59 {                                                                              \
  60     if (outsz >= dgstsize && fin(out, ctx)) {                                  \
  61         *outl = dgstsize;                                                      \
  62         return 1;                                                              \
  63     }                                                                          \
  64     return 0;                                                                  \
  65 }                                                                              \
  66 PROV_FUNC_DIGEST_GET_PARAM(name, blksize, dgstsize, flags)                     \
  67 const OSSL_DISPATCH name##_functions[] = {                                     \
  68     { OSSL_FUNC_DIGEST_NEWCTX, (void (*)(void))name##_newctx },                \
  69     { OSSL_FUNC_DIGEST_INIT, (void (*)(void))init },                           \
  70     { OSSL_FUNC_DIGEST_UPDATE, (void (*)(void))upd },                          \
  71     { OSSL_FUNC_DIGEST_FINAL, (void (*)(void))name##_internal_final },         \
  72     { OSSL_FUNC_DIGEST_FREECTX, (void (*)(void))name##_freectx },              \
  73     { OSSL_FUNC_DIGEST_DUPCTX, (void (*)(void))name##_dupctx },                \
  74     PROV_DISPATCH_FUNC_DIGEST_GET_PARAMS(name)
  75
  76 # define PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_END                               \
  77     { 0, NULL }                                                                \
  78 };
  79
  80 # define IMPLEMENT_digest_functions(                                           \
  81     name, CTX, blksize, dgstsize, flags, init, upd, fin)                       \
  82 PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_START(name, CTX, blksize, dgstsize, flags, \
  83                                           init, upd, fin),                     \
  84 PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_END
  85
  86 # define IMPLEMENT_digest_functions_with_settable_ctx(                         \
  87     name, CTX, blksize, dgstsize, flags, init, upd, fin,                       \
  88     settable_ctx_params, set_ctx_params)                                       \
  89 PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_START(name, CTX, blksize, dgstsize, flags, \
  90                                           init, upd, fin),                     \
  91 { OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS, (void (*)(void))settable_ctx_params }, \
  92 { OSSL_FUNC_DIGEST_SET_CTX_PARAMS, (void (*)(void))set_ctx_params },           \
  93 PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_END
  94
  95
  96 const OSSL_PARAM *digest_default_gettable_params(void);
  97 int digest_default_get_params(OSSL_PARAM params[], size_t blksz, size_t paramsz,
  98                               unsigned long flags);
  99
 100 # ifdef __cplusplus
 101 }
 102 # endif
 103
 104 #endif /* OSSL_PROVIDERS_DIGESTCOMMON_H */