| 1 | /*
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| 2 | * Copyright 2019-2021 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 OSSL_PROVIDERS_DIGESTCOMMON_H
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| 11 | # define OSSL_PROVIDERS_DIGESTCOMMON_H
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| 12 |
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| 13 | # include <openssl/core_dispatch.h>
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| 14 | # include <openssl/core_names.h>
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| 15 | # include <openssl/params.h>
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| 16 | # include "prov/providercommon.h"
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| 17 |
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| 18 | /* Internal flags that can be queried */
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| 19 | #define PROV_DIGEST_FLAG_XOF 0x0001
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| 20 | #define PROV_DIGEST_FLAG_ALGID_ABSENT 0x0002
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| 21 |
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| 22 | # ifdef __cplusplus
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| 23 | extern "C" {
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| 24 | # endif
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| 25 |
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| 26 | #define PROV_FUNC_DIGEST_GET_PARAM(name, blksize, dgstsize, flags) \
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| 27 | static OSSL_FUNC_digest_get_params_fn name##_get_params; \
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| 28 | static int name##_get_params(OSSL_PARAM params[]) \
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| 29 | { \
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| 30 | return ossl_digest_default_get_params(params, blksize, dgstsize, flags); \
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| 31 | }
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| 32 |
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| 33 | #define PROV_DISPATCH_FUNC_DIGEST_GET_PARAMS(name) \
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| 34 | { OSSL_FUNC_DIGEST_GET_PARAMS, (void (*)(void))name##_get_params }, \
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| 35 | { OSSL_FUNC_DIGEST_GETTABLE_PARAMS, \
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| 36 | (void (*)(void))ossl_digest_default_gettable_params }
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| 37 |
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| 38 | # define PROV_FUNC_DIGEST_FINAL(name, dgstsize, fin) \
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| 39 | static OSSL_FUNC_digest_final_fn name##_internal_final; \
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| 40 | static int name##_internal_final(void *ctx, unsigned char *out, size_t *outl, \
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| 41 | size_t outsz) \
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| 42 | { \
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| 43 | if (ossl_prov_is_running() && outsz >= dgstsize && fin(out, ctx)) { \
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| 44 | *outl = dgstsize; \
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| 45 | return 1; \
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| 46 | } \
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| 47 | return 0; \
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| 48 | }
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| 49 |
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| 50 | # define PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_START( \
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| 51 | name, CTX, blksize, dgstsize, flags, upd, fin) \
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| 52 | static OSSL_FUNC_digest_newctx_fn name##_newctx; \
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| 53 | static OSSL_FUNC_digest_freectx_fn name##_freectx; \
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| 54 | static OSSL_FUNC_digest_dupctx_fn name##_dupctx; \
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| 55 | static void *name##_newctx(void *prov_ctx) \
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| 56 | { \
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| 57 | CTX *ctx = ossl_prov_is_running() ? OPENSSL_zalloc(sizeof(*ctx)) : NULL; \
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| 58 | return ctx; \
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| 59 | } \
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| 60 | static void name##_freectx(void *vctx) \
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| 61 | { \
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| 62 | CTX *ctx = (CTX *)vctx; \
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| 63 | OPENSSL_clear_free(ctx, sizeof(*ctx)); \
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| 64 | } \
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| 65 | static void *name##_dupctx(void *ctx) \
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| 66 | { \
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| 67 | CTX *in = (CTX *)ctx; \
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| 68 | CTX *ret = ossl_prov_is_running() ? OPENSSL_malloc(sizeof(*ret)) : NULL; \
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| 69 | if (ret != NULL) \
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| 70 | *ret = *in; \
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| 71 | return ret; \
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| 72 | } \
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| 73 | PROV_FUNC_DIGEST_FINAL(name, dgstsize, fin) \
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| 74 | PROV_FUNC_DIGEST_GET_PARAM(name, blksize, dgstsize, flags) \
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| 75 | const OSSL_DISPATCH ossl_##name##_functions[] = { \
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| 76 | { OSSL_FUNC_DIGEST_NEWCTX, (void (*)(void))name##_newctx }, \
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| 77 | { OSSL_FUNC_DIGEST_UPDATE, (void (*)(void))upd }, \
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| 78 | { OSSL_FUNC_DIGEST_FINAL, (void (*)(void))name##_internal_final }, \
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| 79 | { OSSL_FUNC_DIGEST_FREECTX, (void (*)(void))name##_freectx }, \
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| 80 | { OSSL_FUNC_DIGEST_DUPCTX, (void (*)(void))name##_dupctx }, \
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| 81 | PROV_DISPATCH_FUNC_DIGEST_GET_PARAMS(name)
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| 82 |
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| 83 | # define PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_END \
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| 84 | { 0, NULL } \
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| 85 | };
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| 86 |
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| 87 | # define IMPLEMENT_digest_functions( \
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| 88 | name, CTX, blksize, dgstsize, flags, init, upd, fin) \
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| 89 | static OSSL_FUNC_digest_init_fn name##_internal_init; \
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| 90 | static int name##_internal_init(void *ctx, \
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| 91 | ossl_unused const OSSL_PARAM params[]) \
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| 92 | { \
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| 93 | return ossl_prov_is_running() && init(ctx); \
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| 94 | } \
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| 95 | PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_START(name, CTX, blksize, dgstsize, flags, \
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| 96 | upd, fin), \
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| 97 | { OSSL_FUNC_DIGEST_INIT, (void (*)(void))name##_internal_init }, \
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| 98 | PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_END
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| 99 |
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| 100 | # define IMPLEMENT_digest_functions_with_settable_ctx( \
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| 101 | name, CTX, blksize, dgstsize, flags, init, upd, fin, \
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| 102 | settable_ctx_params, set_ctx_params) \
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| 103 | static OSSL_FUNC_digest_init_fn name##_internal_init; \
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| 104 | static int name##_internal_init(void *ctx, const OSSL_PARAM params[]) \
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| 105 | { \
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| 106 | return ossl_prov_is_running() \
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| 107 | && init(ctx) \
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| 108 | && set_ctx_params(ctx, params); \
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| 109 | } \
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| 110 | PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_START(name, CTX, blksize, dgstsize, flags, \
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| 111 | upd, fin), \
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| 112 | { OSSL_FUNC_DIGEST_INIT, (void (*)(void))name##_internal_init }, \
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| 113 | { OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS, (void (*)(void))settable_ctx_params }, \
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| 114 | { OSSL_FUNC_DIGEST_SET_CTX_PARAMS, (void (*)(void))set_ctx_params }, \
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| 115 | PROV_DISPATCH_FUNC_DIGEST_CONSTRUCT_END
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| 116 |
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| 117 |
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| 118 | const OSSL_PARAM *ossl_digest_default_gettable_params(void *provctx);
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| 119 | int ossl_digest_default_get_params(OSSL_PARAM params[], size_t blksz,
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| 120 | size_t paramsz, unsigned long flags);
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| 121 |
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| 122 | # ifdef __cplusplus
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| 123 | }
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| 124 | # endif
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| 125 |
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| 126 | #endif /* OSSL_PROVIDERS_DIGESTCOMMON_H */
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