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-rw-r--r--include/openssl/trace.h312
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diff --git a/include/openssl/trace.h b/include/openssl/trace.h
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--- a/include/openssl/trace.h
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-/*
- * Copyright 2019-2021 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
- */
-
-#ifndef OPENSSL_TRACE_H
-# define OPENSSL_TRACE_H
-# pragma once
-
-# include <stdarg.h>
-
-# include <openssl/bio.h>
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-/*
- * TRACE CATEGORIES
- */
-
-/*
- * The trace messages of the OpenSSL libraries are organized into different
- * categories. For every trace category, the application can register a separate
- * tracer callback. When a callback is registered, a so called trace channel is
- * created for this category. This channel consists essentially of an internal
- * BIO which sends all trace output it receives to the registered application
- * callback.
- *
- * The ALL category can be used as a fallback category to register a single
- * channel which receives the output from all categories. However, if the
- * application intends to print the trace channel name in the line prefix,
- * it is better to register channels for all categories separately.
- * (This is how the openssl application does it.)
- */
-# define OSSL_TRACE_CATEGORY_ALL 0 /* The fallback */
-# define OSSL_TRACE_CATEGORY_TRACE 1
-# define OSSL_TRACE_CATEGORY_INIT 2
-# define OSSL_TRACE_CATEGORY_TLS 3
-# define OSSL_TRACE_CATEGORY_TLS_CIPHER 4
-# define OSSL_TRACE_CATEGORY_CONF 5
-# ifndef OPENSSL_NO_ENGINE
-# define OSSL_TRACE_CATEGORY_ENGINE_TABLE 6
-# define OSSL_TRACE_CATEGORY_ENGINE_REF_COUNT 7
-# endif
-# define OSSL_TRACE_CATEGORY_PKCS5V2 8
-# define OSSL_TRACE_CATEGORY_PKCS12_KEYGEN 9
-# define OSSL_TRACE_CATEGORY_PKCS12_DECRYPT 10
-# define OSSL_TRACE_CATEGORY_X509V3_POLICY 11
-# define OSSL_TRACE_CATEGORY_BN_CTX 12
-# define OSSL_TRACE_CATEGORY_CMP 13
-# define OSSL_TRACE_CATEGORY_STORE 14
-# define OSSL_TRACE_CATEGORY_DECODER 15
-# define OSSL_TRACE_CATEGORY_ENCODER 16
-# define OSSL_TRACE_CATEGORY_REF_COUNT 17
-/* Count of available categories. */
-# define OSSL_TRACE_CATEGORY_NUM 18
-
-/* Returns the trace category number for the given |name| */
-int OSSL_trace_get_category_num(const char *name);
-
-/* Returns the trace category name for the given |num| */
-const char *OSSL_trace_get_category_name(int num);
-
-/*
- * TRACE CONSUMERS
- */
-
-/*
- * Enables tracing for the given |category| by providing a BIO sink
- * as |channel|. If a null pointer is passed as |channel|, an existing
- * trace channel is removed and tracing for the category is disabled.
- *
- * Returns 1 on success and 0 on failure
- */
-int OSSL_trace_set_channel(int category, BIO* channel);
-
-/*
- * Attach a prefix and a suffix to the given |category|, to be printed at the
- * beginning and at the end of each trace output group, i.e. when
- * OSSL_trace_begin() and OSSL_trace_end() are called.
- * If a null pointer is passed as argument, the existing prefix or suffix is
- * removed.
- *
- * They return 1 on success and 0 on failure
- */
-int OSSL_trace_set_prefix(int category, const char *prefix);
-int OSSL_trace_set_suffix(int category, const char *suffix);
-
-/*
- * OSSL_trace_cb is the type tracing callback provided by the application.
- * It MUST return the number of bytes written, or 0 on error (in other words,
- * it can never write zero bytes).
- *
- * The |buffer| will always contain text, which may consist of several lines.
- * The |data| argument points to whatever data was provided by the application
- * when registering the tracer function.
- *
- * The |category| number is given, as well as a |cmd| number, described below.
- */
-typedef size_t (*OSSL_trace_cb)(const char *buffer, size_t count,
- int category, int cmd, void *data);
-/*
- * Possible |cmd| numbers.
- */
-# define OSSL_TRACE_CTRL_BEGIN 0
-# define OSSL_TRACE_CTRL_WRITE 1
-# define OSSL_TRACE_CTRL_END 2
-
-/*
- * Enables tracing for the given |category| by creating an internal
- * trace channel which sends the output to the given |callback|.
- * If a null pointer is passed as callback, an existing trace channel
- * is removed and tracing for the category is disabled.
- *
- * NOTE: OSSL_trace_set_channel() and OSSL_trace_set_callback() are mutually
- * exclusive.
- *
- * Returns 1 on success and 0 on failure
- */
-int OSSL_trace_set_callback(int category, OSSL_trace_cb callback, void *data);
-
-/*
- * TRACE PRODUCERS
- */
-
-/*
- * Returns 1 if tracing for the specified category is enabled, otherwise 0
- */
-int OSSL_trace_enabled(int category);
-
-/*
- * Wrap a group of tracing output calls. OSSL_trace_begin() locks tracing and
- * returns the trace channel associated with the given category, or NULL if no
- * channel is associated with the category. OSSL_trace_end() unlocks tracing.
- *
- * Usage:
- *
- * BIO *out;
- * if ((out = OSSL_trace_begin(category)) != NULL) {
- * ...
- * BIO_fprintf(out, ...);
- * ...
- * OSSL_trace_end(category, out);
- * }
- *
- * See also the convenience macros OSSL_TRACE_BEGIN and OSSL_TRACE_END below.
- */
-BIO *OSSL_trace_begin(int category);
-void OSSL_trace_end(int category, BIO *channel);
-
-/*
- * OSSL_TRACE* Convenience Macros
- */
-
-/*
- * When the tracing feature is disabled, these macros are defined to
- * produce dead code, which a good compiler should eliminate.
- */
-
-/*
- * OSSL_TRACE_BEGIN, OSSL_TRACE_END - Define a Trace Group
- *
- * These two macros can be used to create a block which is executed only
- * if the corresponding trace category is enabled. Inside this block, a
- * local variable named |trc_out| is defined, which points to the channel
- * associated with the given trace category.
- *
- * Usage: (using 'TLS' as an example category)
- *
- * OSSL_TRACE_BEGIN(TLS) {
- *
- * BIO_fprintf(trc_out, ... );
- *
- * } OSSL_TRACE_END(TLS);
- *
- *
- * This expands to the following code
- *
- * do {
- * BIO *trc_out = OSSL_trace_begin(OSSL_TRACE_CATEGORY_TLS);
- * if (trc_out != NULL) {
- * ...
- * BIO_fprintf(trc_out, ...);
- * }
- * OSSL_trace_end(OSSL_TRACE_CATEGORY_TLS, trc_out);
- * } while (0);
- *
- * The use of the inner '{...}' group and the trailing ';' is enforced
- * by the definition of the macros in order to make the code look as much
- * like C code as possible.
- *
- * Before returning from inside the trace block, it is necessary to
- * call OSSL_TRACE_CANCEL(category).
- */
-
-# if !defined OPENSSL_NO_TRACE && !defined FIPS_MODULE
-
-# define OSSL_TRACE_BEGIN(category) \
- do { \
- BIO *trc_out = OSSL_trace_begin(OSSL_TRACE_CATEGORY_##category); \
- \
- if (trc_out != NULL)
-
-# define OSSL_TRACE_END(category) \
- OSSL_trace_end(OSSL_TRACE_CATEGORY_##category, trc_out); \
- } while (0)
-
-# define OSSL_TRACE_CANCEL(category) \
- OSSL_trace_end(OSSL_TRACE_CATEGORY_##category, trc_out) \
-
-# else
-
-# define OSSL_TRACE_BEGIN(category) \
- do { \
- BIO *trc_out = NULL; \
- if (0)
-
-# define OSSL_TRACE_END(category) \
- } while(0)
-
-# define OSSL_TRACE_CANCEL(category) \
- ((void)0)
-
-# endif
-
-/*
- * OSSL_TRACE_ENABLED() - Check whether tracing is enabled for |category|
- *
- * Usage:
- *
- * if (OSSL_TRACE_ENABLED(TLS)) {
- * ...
- * }
- */
-# if !defined OPENSSL_NO_TRACE && !defined FIPS_MODULE
-
-# define OSSL_TRACE_ENABLED(category) \
- OSSL_trace_enabled(OSSL_TRACE_CATEGORY_##category)
-
-# else
-
-# define OSSL_TRACE_ENABLED(category) (0)
-
-# endif
-
-/*
- * OSSL_TRACE*() - OneShot Trace Macros
- *
- * These macros are intended to produce a simple printf-style trace output.
- * Unfortunately, C90 macros don't support variable arguments, so the
- * "vararg" OSSL_TRACEV() macro has a rather weird usage pattern:
- *
- * OSSL_TRACEV(category, (trc_out, "format string", ...args...));
- *
- * Where 'channel' is the literal symbol of this name, not a variable.
- * For that reason, it is currently not intended to be used directly,
- * but only as helper macro for the other oneshot trace macros
- * OSSL_TRACE(), OSSL_TRACE1(), OSSL_TRACE2(), ...
- *
- * Usage:
- *
- * OSSL_TRACE(INIT, "Hello world!\n");
- * OSSL_TRACE1(TLS, "The answer is %d\n", 42);
- * OSSL_TRACE2(TLS, "The ultimate question to answer %d is '%s'\n",
- * 42, "What do you get when you multiply six by nine?");
- */
-
-# if !defined OPENSSL_NO_TRACE && !defined FIPS_MODULE
-
-# define OSSL_TRACEV(category, args) \
- OSSL_TRACE_BEGIN(category) \
- BIO_printf args; \
- OSSL_TRACE_END(category)
-
-# else
-
-# define OSSL_TRACEV(category, args) ((void)0)
-
-# endif
-
-# define OSSL_TRACE(category, text) \
- OSSL_TRACEV(category, (trc_out, "%s", text))
-
-# define OSSL_TRACE1(category, format, arg1) \
- OSSL_TRACEV(category, (trc_out, format, arg1))
-# define OSSL_TRACE2(category, format, arg1, arg2) \
- OSSL_TRACEV(category, (trc_out, format, arg1, arg2))
-# define OSSL_TRACE3(category, format, arg1, arg2, arg3) \
- OSSL_TRACEV(category, (trc_out, format, arg1, arg2, arg3))
-# define OSSL_TRACE4(category, format, arg1, arg2, arg3, arg4) \
- OSSL_TRACEV(category, (trc_out, format, arg1, arg2, arg3, arg4))
-# define OSSL_TRACE5(category, format, arg1, arg2, arg3, arg4, arg5) \
- OSSL_TRACEV(category, (trc_out, format, arg1, arg2, arg3, arg4, arg5))
-# define OSSL_TRACE6(category, format, arg1, arg2, arg3, arg4, arg5, arg6) \
- OSSL_TRACEV(category, (trc_out, format, arg1, arg2, arg3, arg4, arg5, arg6))
-# define OSSL_TRACE7(category, format, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
- OSSL_TRACEV(category, (trc_out, format, arg1, arg2, arg3, arg4, arg5, arg6, arg7))
-# define OSSL_TRACE8(category, format, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
- OSSL_TRACEV(category, (trc_out, format, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8))
-# define OSSL_TRACE9(category, format, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
- OSSL_TRACEV(category, (trc_out, format, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9))
-
-# ifdef __cplusplus
-}
-# endif
-
-#endif
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