/src/openssl32/crypto/trace.c

Source (jump to first uncovered line)
/*
 * Copyright 2019-2023 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
 */

#include <stdio.h>
#include <string.h>

#include "internal/thread_once.h"
#include <openssl/bio.h>
#include <openssl/crypto.h>
#include <openssl/trace.h>
#include "internal/bio.h"
#include "internal/nelem.h"
#include "internal/refcount.h"
#include "crypto/cryptlib.h"
#include "crypto/ctype.h"

#ifndef OPENSSL_NO_TRACE

static CRYPTO_RWLOCK *trace_lock = NULL;

static const BIO  *current_channel = NULL;

/*-
 * INTERNAL TRACE CHANNEL IMPLEMENTATION
 *
 * For our own flexibility, all trace categories are associated with a
 * BIO sink object, also called the trace channel. Instead of a BIO object,
 * the application can also provide a callback function, in which case an
 * internal trace channel is attached, which simply calls the registered
 * callback function.
 */
static int trace_write(BIO *b, const char *buf,
                               size_t num, size_t *written);
static int trace_puts(BIO *b, const char *str);
static long trace_ctrl(BIO *channel, int cmd, long argl, void *argp);
static int trace_free(BIO *b);

static const BIO_METHOD trace_method = {
    BIO_TYPE_SOURCE_SINK,
    "trace",
    trace_write,
    NULL,                        /* old write */
    NULL,                        /* read_ex */
    NULL,                        /* read */
    trace_puts,
    NULL,                        /* gets */
    trace_ctrl,                  /* ctrl */
    NULL,                        /* create */
    trace_free,                  /* free */
    NULL,                        /* callback_ctrl */
};

struct trace_data_st {
    OSSL_trace_cb callback;
    int category;
    void *data;
};

static int trace_write(BIO *channel,
                       const char *buf, size_t num, size_t *written)
{
    struct trace_data_st *ctx = BIO_get_data(channel);
    size_t cnt = ctx->callback(buf, num, ctx->category, OSSL_TRACE_CTRL_WRITE,
                               ctx->data);

    *written = cnt;
    return cnt != 0;
}

static int trace_puts(BIO *channel, const char *str)
{
    size_t written;

    if (trace_write(channel, str, strlen(str), &written))
        return (int)written;

    return EOF;
}

static long trace_ctrl(BIO *channel, int cmd, long argl, void *argp)
{
    struct trace_data_st *ctx = BIO_get_data(channel);

    switch (cmd) {
    case OSSL_TRACE_CTRL_BEGIN:
    case OSSL_TRACE_CTRL_END:
        /* We know that the callback is likely to return 0 here */
        ctx->callback("", 0, ctx->category, cmd, ctx->data);
        return 1;
    default:
        break;
    }
    return -2;                   /* Unsupported */
}

static int trace_free(BIO *channel)
{
    if (channel == NULL)
        return 0;
    OPENSSL_free(BIO_get_data(channel));
    return 1;
}
#endif

/*-
 * TRACE
 */

/* Helper struct and macro to get name string to number mapping */
struct trace_category_st {
    const char * const name;
    const int num;
};
#define TRACE_CATEGORY_(name)       { #name, OSSL_TRACE_CATEGORY_##name }

static const struct trace_category_st
    trace_categories[OSSL_TRACE_CATEGORY_NUM] = {
    TRACE_CATEGORY_(ALL),
    TRACE_CATEGORY_(TRACE),
    TRACE_CATEGORY_(INIT),
    TRACE_CATEGORY_(TLS),
    TRACE_CATEGORY_(TLS_CIPHER),
    TRACE_CATEGORY_(CONF),
    TRACE_CATEGORY_(ENGINE_TABLE),
    TRACE_CATEGORY_(ENGINE_REF_COUNT),
    TRACE_CATEGORY_(PKCS5V2),
    TRACE_CATEGORY_(PKCS12_KEYGEN),
    TRACE_CATEGORY_(PKCS12_DECRYPT),
    TRACE_CATEGORY_(X509V3_POLICY),
    TRACE_CATEGORY_(BN_CTX),
    TRACE_CATEGORY_(CMP),
    TRACE_CATEGORY_(STORE),
    TRACE_CATEGORY_(DECODER),
    TRACE_CATEGORY_(ENCODER),
    TRACE_CATEGORY_(REF_COUNT),
    TRACE_CATEGORY_(HTTP),
}; /* KEEP THIS LIST IN SYNC with #define OSSL_TRACE_CATEGORY_... in trace.h */

const char *OSSL_trace_get_category_name(int num)
{
    if (num < 0 || (size_t)num >= OSSL_NELEM(trace_categories))
        return NULL;
    /*
     * Partial check that OSSL_TRACE_CATEGORY_... macros
     * are synced with trace_categories array
     */
    if (!ossl_assert(trace_categories[num].name != NULL)
        || !ossl_assert(trace_categories[num].num == num))
        return NULL;
    return trace_categories[num].name;
}

int OSSL_trace_get_category_num(const char *name)
{
    size_t i;

    if (name == NULL)
        return -1;

    for (i = 0; i < OSSL_NELEM(trace_categories); i++)
        if (OPENSSL_strcasecmp(name, trace_categories[i].name) == 0)
            return trace_categories[i].num;

    return -1; /* not found */
}

#ifndef OPENSSL_NO_TRACE

/* We use one trace channel for each trace category */
static struct {
    enum { SIMPLE_CHANNEL, CALLBACK_CHANNEL } type;
    BIO *bio;
    char *prefix;
    char *suffix;
} trace_channels[OSSL_TRACE_CATEGORY_NUM] = {
    { 0, NULL, NULL, NULL },
};

#endif

#ifndef OPENSSL_NO_TRACE

enum {
    CHANNEL,
    PREFIX,
    SUFFIX
};

static int trace_attach_cb(int category, int type, const void *data)
{
    switch (type) {
    case CHANNEL:
        OSSL_TRACE2(TRACE, "Attach channel %p to category '%s'\n",
                    data, trace_categories[category].name);
        break;
    case PREFIX:
        OSSL_TRACE2(TRACE, "Attach prefix \"%s\" to category '%s'\n",
                    (const char *)data, trace_categories[category].name);
        break;
    case SUFFIX:
        OSSL_TRACE2(TRACE, "Attach suffix \"%s\" to category '%s'\n",
                    (const char *)data, trace_categories[category].name);
        break;
    default:                     /* No clue */
        break;
    }
    return 1;
}

static int trace_detach_cb(int category, int type, const void *data)
{
    switch (type) {
    case CHANNEL:
        OSSL_TRACE2(TRACE, "Detach channel %p from category '%s'\n",
                    data, trace_categories[category].name);
        break;
    case PREFIX:
        OSSL_TRACE2(TRACE, "Detach prefix \"%s\" from category '%s'\n",
                    (const char *)data, trace_categories[category].name);
        break;
    case SUFFIX:
        OSSL_TRACE2(TRACE, "Detach suffix \"%s\" from category '%s'\n",
                    (const char *)data, trace_categories[category].name);
        break;
    default:                     /* No clue */
        break;
    }
    return 1;
}

static int do_ossl_trace_init(void);
static CRYPTO_ONCE trace_inited = CRYPTO_ONCE_STATIC_INIT;
DEFINE_RUN_ONCE_STATIC(ossl_trace_init)
{
    return do_ossl_trace_init();
}

static int set_trace_data(int category, int type, BIO **channel,
                          const char **prefix, const char **suffix,
                          int (*attach_cb)(int, int, const void *),
                          int (*detach_cb)(int, int, const void *))
{
    BIO *curr_channel = NULL;
    char *curr_prefix = NULL;
    char *curr_suffix = NULL;

    /* Ensure do_ossl_trace_init() is called once */
    if (!RUN_ONCE(&trace_inited, ossl_trace_init))
        return 0;

    curr_channel = trace_channels[category].bio;
    curr_prefix = trace_channels[category].prefix;
    curr_suffix = trace_channels[category].suffix;

    /* Make sure to run the detach callback first on all data */
    if (prefix != NULL && curr_prefix != NULL) {
        detach_cb(category, PREFIX, curr_prefix);
    }

    if (suffix != NULL && curr_suffix != NULL) {
        detach_cb(category, SUFFIX, curr_suffix);
    }

    if (channel != NULL && curr_channel != NULL) {
        detach_cb(category, CHANNEL, curr_channel);
    }

    /* After detach callbacks are done, clear data where appropriate */
    if (prefix != NULL && curr_prefix != NULL) {
        OPENSSL_free(curr_prefix);
        trace_channels[category].prefix = NULL;
    }

    if (suffix != NULL && curr_suffix != NULL) {
        OPENSSL_free(curr_suffix);
        trace_channels[category].suffix = NULL;
    }

    if (channel != NULL && curr_channel != NULL) {
        BIO_free(curr_channel);
        trace_channels[category].type = 0;
        trace_channels[category].bio = NULL;
    }

    /* Before running callbacks are done, set new data where appropriate */
    if (prefix != NULL && *prefix != NULL) {
        if ((curr_prefix = OPENSSL_strdup(*prefix)) == NULL)
            return 0;
        trace_channels[category].prefix = curr_prefix;
    }

    if (suffix != NULL && *suffix != NULL) {
        if ((curr_suffix = OPENSSL_strdup(*suffix)) == NULL)
            return 0;
        trace_channels[category].suffix = curr_suffix;
    }

    if (channel != NULL && *channel != NULL) {
        trace_channels[category].type = type;
        trace_channels[category].bio = *channel;
        /*
         * This must not be done before setting prefix/suffix,
         * as those may fail, and then the caller is mislead to free *channel.
         */
    }

    /* Finally, run the attach callback on the new data */
    if (channel != NULL && *channel != NULL) {
        attach_cb(category, CHANNEL, *channel);
    }

    if (prefix != NULL && *prefix != NULL) {
        attach_cb(category, PREFIX, *prefix);
    }

    if (suffix != NULL && *suffix != NULL) {
        attach_cb(category, SUFFIX, *suffix);
    }

    return 1;
}

static int do_ossl_trace_init(void)
{
    trace_lock = CRYPTO_THREAD_lock_new();
    return trace_lock != NULL;
}

#endif

void ossl_trace_cleanup(void)
{
#ifndef OPENSSL_NO_TRACE
    int category;
    BIO *channel = NULL;
    const char *prefix = NULL;
    const char *suffix = NULL;

    for (category = 0; category < OSSL_TRACE_CATEGORY_NUM; category++) {
        /* We force the TRACE category to be treated last */
        if (category == OSSL_TRACE_CATEGORY_TRACE)
            continue;
        set_trace_data(category, 0, &channel, &prefix, &suffix,
                       trace_attach_cb, trace_detach_cb);
    }
    set_trace_data(OSSL_TRACE_CATEGORY_TRACE, 0, &channel,
                   &prefix, &suffix,
                   trace_attach_cb, trace_detach_cb);
    CRYPTO_THREAD_lock_free(trace_lock);
#endif
}

int OSSL_trace_set_channel(int category, BIO *channel)
{
#ifndef OPENSSL_NO_TRACE
    if (category >= 0 && category < OSSL_TRACE_CATEGORY_NUM)
        return set_trace_data(category, SIMPLE_CHANNEL, &channel, NULL, NULL,
                              trace_attach_cb, trace_detach_cb);
#endif
    return 0;
}

#ifndef OPENSSL_NO_TRACE
static int trace_attach_w_callback_cb(int category, int type, const void *data)
{
    switch (type) {
    case CHANNEL:
        OSSL_TRACE2(TRACE,
                    "Attach channel %p to category '%s' (with callback)\n",
                    data, trace_categories[category].name);
        break;
    case PREFIX:
        OSSL_TRACE2(TRACE, "Attach prefix \"%s\" to category '%s'\n",
                    (const char *)data, trace_categories[category].name);
        break;
    case SUFFIX:
        OSSL_TRACE2(TRACE, "Attach suffix \"%s\" to category '%s'\n",
                    (const char *)data, trace_categories[category].name);
        break;
    default:                     /* No clue */
        break;
    }
    return 1;
}
#endif

int OSSL_trace_set_callback(int category, OSSL_trace_cb callback, void *data)
{
#ifndef OPENSSL_NO_TRACE
    BIO *channel = NULL;
    struct trace_data_st *trace_data = NULL;

    if (category < 0 || category >= OSSL_TRACE_CATEGORY_NUM)
        return 0;

    if (callback != NULL) {
        if ((channel = BIO_new(&trace_method)) == NULL
            || (trace_data =
                OPENSSL_zalloc(sizeof(struct trace_data_st))) == NULL)
            goto err;

        trace_data->callback = callback;
        trace_data->category = category;
        trace_data->data = data;

        BIO_set_data(channel, trace_data);
    }

    if (!set_trace_data(category, CALLBACK_CHANNEL, &channel, NULL, NULL,
                        trace_attach_w_callback_cb, trace_detach_cb))
        goto err;

    return 1;

 err:
    BIO_free(channel);
    OPENSSL_free(trace_data);
#endif

    return 0;
}

int OSSL_trace_set_prefix(int category, const char *prefix)
{
#ifndef OPENSSL_NO_TRACE
    if (category >= 0 && category < OSSL_TRACE_CATEGORY_NUM)
        return set_trace_data(category, 0, NULL, &prefix, NULL,
                              trace_attach_cb, trace_detach_cb);
#endif
    return 0;
}

int OSSL_trace_set_suffix(int category, const char *suffix)
{
#ifndef OPENSSL_NO_TRACE
    if (category >= 0 && category < OSSL_TRACE_CATEGORY_NUM)
        return set_trace_data(category, 0, NULL, NULL, &suffix,
                              trace_attach_cb, trace_detach_cb);
#endif
    return 0;
}

#ifndef OPENSSL_NO_TRACE
static int ossl_trace_get_category(int category)
{
    if (category < 0 || category >= OSSL_TRACE_CATEGORY_NUM)
        return -1;
    if (trace_channels[category].bio != NULL)
        return category;
    return OSSL_TRACE_CATEGORY_ALL;
}
#endif

int OSSL_trace_enabled(int category)
{
    int ret = 0;
#ifndef OPENSSL_NO_TRACE
    category = ossl_trace_get_category(category);
    if (category >= 0)
        ret = trace_channels[category].bio != NULL;
#endif
    return ret;
}

BIO *OSSL_trace_begin(int category)
{
    BIO *channel = NULL;
#ifndef OPENSSL_NO_TRACE
    char *prefix = NULL;

    category = ossl_trace_get_category(category);
    if (category < 0 || !OSSL_trace_enabled(category))
        return NULL;

    channel = trace_channels[category].bio;
    prefix = trace_channels[category].prefix;

    if (channel != NULL) {
        if (!CRYPTO_THREAD_write_lock(trace_lock))
            return NULL;
        current_channel = channel;
        switch (trace_channels[category].type) {
        case SIMPLE_CHANNEL:
            if (prefix != NULL) {
                (void)BIO_puts(channel, prefix);
                (void)BIO_puts(channel, "\n");
            }
            break;
        case CALLBACK_CHANNEL:
            (void)BIO_ctrl(channel, OSSL_TRACE_CTRL_BEGIN,
                           prefix == NULL ? 0 : strlen(prefix), prefix);
            break;
        }
    }
#endif
    return channel;
}

void OSSL_trace_end(int category, BIO *channel)
{
#ifndef OPENSSL_NO_TRACE
    char *suffix = NULL;

    category = ossl_trace_get_category(category);
    if (category < 0)
        return;
    suffix = trace_channels[category].suffix;
    if (channel != NULL
        && ossl_assert(channel == current_channel)) {
        (void)BIO_flush(channel);
        switch (trace_channels[category].type) {
        case SIMPLE_CHANNEL:
            if (suffix != NULL) {
                (void)BIO_puts(channel, suffix);
                (void)BIO_puts(channel, "\n");
            }
            break;
        case CALLBACK_CHANNEL:
            (void)BIO_ctrl(channel, OSSL_TRACE_CTRL_END,
                           suffix == NULL ? 0 : strlen(suffix), suffix);
            break;
        }
        current_channel = NULL;
        CRYPTO_THREAD_unlock(trace_lock);
    }
#endif
}

int OSSL_trace_string(BIO *out, int text, int full,
                      const unsigned char *data, size_t size)
{
    unsigned char buf[OSSL_TRACE_STRING_MAX + 1];
    int len, i;

    if (!full && size > OSSL_TRACE_STRING_MAX) {
        BIO_printf(out, "[len %zu limited to %d]: ",
                   size, OSSL_TRACE_STRING_MAX);
        len = OSSL_TRACE_STRING_MAX;
    } else {
        len = (int)size;
    }
    if (!text) { /* mask control characters while preserving newlines */
        for (i = 0; i < len; i++, data++)
            buf[i] = (char)*data != '\n' && ossl_iscntrl((int)*data)
                ? ' ' : *data;
        if (len == 0 || data[-1] != '\n')
            buf[len++] = '\n';
        data = buf;
    }
    return BIO_printf(out, "%.*s", len, data);
}

Coverage Report

Created: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2019-2023 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 <stdio.h>
11		#include <string.h>
12
13		#include "internal/thread_once.h"
14		#include <openssl/bio.h>
15		#include <openssl/crypto.h>
16		#include <openssl/trace.h>
17		#include "internal/bio.h"
18		#include "internal/nelem.h"
19		#include "internal/refcount.h"
20		#include "crypto/cryptlib.h"
21		#include "crypto/ctype.h"
22
23		#ifndef OPENSSL_NO_TRACE
24
25		static CRYPTO_RWLOCK *trace_lock = NULL;
26
27		static const BIO *current_channel = NULL;
28
29		/*-
30		* INTERNAL TRACE CHANNEL IMPLEMENTATION
31		*
32		* For our own flexibility, all trace categories are associated with a
33		* BIO sink object, also called the trace channel. Instead of a BIO object,
34		* the application can also provide a callback function, in which case an
35		* internal trace channel is attached, which simply calls the registered
36		* callback function.
37		*/
38		static int trace_write(BIO b, const char buf,
39		size_t num, size_t *written);
40		static int trace_puts(BIO b, const char str);
41		static long trace_ctrl(BIO channel, int cmd, long argl, void argp);
42		static int trace_free(BIO *b);
43
44		static const BIO_METHOD trace_method = {
45		BIO_TYPE_SOURCE_SINK,
46		"trace",
47		trace_write,
48		NULL, /* old write */
49		NULL, /* read_ex */
50		NULL, /* read */
51		trace_puts,
52		NULL, /* gets */
53		trace_ctrl, /* ctrl */
54		NULL, /* create */
55		trace_free, /* free */
56		NULL, /* callback_ctrl */
57		};
58
59		struct trace_data_st {
60		OSSL_trace_cb callback;
61		int category;
62		void *data;
63		};
64
65		static int trace_write(BIO *channel,
66		const char buf, size_t num, size_t written)
67		{
68		struct trace_data_st *ctx = BIO_get_data(channel);
69		size_t cnt = ctx->callback(buf, num, ctx->category, OSSL_TRACE_CTRL_WRITE,
70		ctx->data);
71
72		*written = cnt;
73		return cnt != 0;
74		}
75
76		static int trace_puts(BIO channel, const char str)
77		{
78		size_t written;
79
80		if (trace_write(channel, str, strlen(str), &written))
81		return (int)written;
82
83		return EOF;
84		}
85
86		static long trace_ctrl(BIO channel, int cmd, long argl, void argp)
87		{
88		struct trace_data_st *ctx = BIO_get_data(channel);
89
90		switch (cmd) {
91		case OSSL_TRACE_CTRL_BEGIN:
92		case OSSL_TRACE_CTRL_END:
93		/* We know that the callback is likely to return 0 here */
94		ctx->callback("", 0, ctx->category, cmd, ctx->data);
95		return 1;
96		default:
97		break;
98		}
99		return -2; /* Unsupported */
100		}
101
102		static int trace_free(BIO *channel)
103		{
104		if (channel == NULL)
105		return 0;
106		OPENSSL_free(BIO_get_data(channel));
107		return 1;
108		}
109		#endif
110
111		/*-
112		* TRACE
113		*/
114
115		/* Helper struct and macro to get name string to number mapping */
116		struct trace_category_st {
117		const char * const name;
118		const int num;
119		};
120		#define TRACE_CATEGORY_(name) { #name, OSSL_TRACE_CATEGORY_##name }
121
122		static const struct trace_category_st
123		trace_categories[OSSL_TRACE_CATEGORY_NUM] = {
124		TRACE_CATEGORY_(ALL),
125		TRACE_CATEGORY_(TRACE),
126		TRACE_CATEGORY_(INIT),
127		TRACE_CATEGORY_(TLS),
128		TRACE_CATEGORY_(TLS_CIPHER),
129		TRACE_CATEGORY_(CONF),
130		TRACE_CATEGORY_(ENGINE_TABLE),
131		TRACE_CATEGORY_(ENGINE_REF_COUNT),
132		TRACE_CATEGORY_(PKCS5V2),
133		TRACE_CATEGORY_(PKCS12_KEYGEN),
134		TRACE_CATEGORY_(PKCS12_DECRYPT),
135		TRACE_CATEGORY_(X509V3_POLICY),
136		TRACE_CATEGORY_(BN_CTX),
137		TRACE_CATEGORY_(CMP),
138		TRACE_CATEGORY_(STORE),
139		TRACE_CATEGORY_(DECODER),
140		TRACE_CATEGORY_(ENCODER),
141		TRACE_CATEGORY_(REF_COUNT),
142		TRACE_CATEGORY_(HTTP),
143		}; /* KEEP THIS LIST IN SYNC with #define OSSL_TRACE_CATEGORY_... in trace.h */
144
145		const char *OSSL_trace_get_category_name(int num)
146	0	{
147	0	if (num < 0 \|\| (size_t)num >= OSSL_NELEM(trace_categories))
148	0	return NULL;
149		/*
150		* Partial check that OSSL_TRACE_CATEGORY_... macros
151		* are synced with trace_categories array
152		*/
153	0	if (!ossl_assert(trace_categories[num].name != NULL)
154	0	\|\| !ossl_assert(trace_categories[num].num == num))
155	0	return NULL;
156	0	return trace_categories[num].name;
157	0	}
158
159		int OSSL_trace_get_category_num(const char *name)
160	0	{
161	0	size_t i;
162
163	0	if (name == NULL)
164	0	return -1;
165
166	0	for (i = 0; i < OSSL_NELEM(trace_categories); i++)
167	0	if (OPENSSL_strcasecmp(name, trace_categories[i].name) == 0)
168	0	return trace_categories[i].num;
169
170	0	return -1; /* not found */
171	0	}
172
173		#ifndef OPENSSL_NO_TRACE
174
175		/* We use one trace channel for each trace category */
176		static struct {
177		enum { SIMPLE_CHANNEL, CALLBACK_CHANNEL } type;
178		BIO *bio;
179		char *prefix;
180		char *suffix;
181		} trace_channels[OSSL_TRACE_CATEGORY_NUM] = {
182		{ 0, NULL, NULL, NULL },
183		};
184
185		#endif
186
187		#ifndef OPENSSL_NO_TRACE
188
189		enum {
190		CHANNEL,
191		PREFIX,
192		SUFFIX
193		};
194
195		static int trace_attach_cb(int category, int type, const void *data)
196		{
197		switch (type) {
198		case CHANNEL:
199		OSSL_TRACE2(TRACE, "Attach channel %p to category '%s'\n",
200		data, trace_categories[category].name);
201		break;
202		case PREFIX:
203		OSSL_TRACE2(TRACE, "Attach prefix \"%s\" to category '%s'\n",
204		(const char *)data, trace_categories[category].name);
205		break;
206		case SUFFIX:
207		OSSL_TRACE2(TRACE, "Attach suffix \"%s\" to category '%s'\n",
208		(const char *)data, trace_categories[category].name);
209		break;
210		default: /* No clue */
211		break;
212		}
213		return 1;
214		}
215
216		static int trace_detach_cb(int category, int type, const void *data)
217		{
218		switch (type) {
219		case CHANNEL:
220		OSSL_TRACE2(TRACE, "Detach channel %p from category '%s'\n",
221		data, trace_categories[category].name);
222		break;
223		case PREFIX:
224		OSSL_TRACE2(TRACE, "Detach prefix \"%s\" from category '%s'\n",
225		(const char *)data, trace_categories[category].name);
226		break;
227		case SUFFIX:
228		OSSL_TRACE2(TRACE, "Detach suffix \"%s\" from category '%s'\n",
229		(const char *)data, trace_categories[category].name);
230		break;
231		default: /* No clue */
232		break;
233		}
234		return 1;
235		}
236
237		static int do_ossl_trace_init(void);
238		static CRYPTO_ONCE trace_inited = CRYPTO_ONCE_STATIC_INIT;
239		DEFINE_RUN_ONCE_STATIC(ossl_trace_init)
240		{
241		return do_ossl_trace_init();
242		}
243
244		static int set_trace_data(int category, int type, BIO **channel,
245		const char prefix, const char suffix,
246		int (attach_cb)(int, int, const void ),
247		int (detach_cb)(int, int, const void ))
248		{
249		BIO *curr_channel = NULL;
250		char *curr_prefix = NULL;
251		char *curr_suffix = NULL;
252
253		/* Ensure do_ossl_trace_init() is called once */
254		if (!RUN_ONCE(&trace_inited, ossl_trace_init))
255		return 0;
256
257		curr_channel = trace_channels[category].bio;
258		curr_prefix = trace_channels[category].prefix;
259		curr_suffix = trace_channels[category].suffix;
260
261		/* Make sure to run the detach callback first on all data */
262		if (prefix != NULL && curr_prefix != NULL) {
263		detach_cb(category, PREFIX, curr_prefix);
264		}
265
266		if (suffix != NULL && curr_suffix != NULL) {
267		detach_cb(category, SUFFIX, curr_suffix);
268		}
269
270		if (channel != NULL && curr_channel != NULL) {
271		detach_cb(category, CHANNEL, curr_channel);
272		}
273
274		/* After detach callbacks are done, clear data where appropriate */
275		if (prefix != NULL && curr_prefix != NULL) {
276		OPENSSL_free(curr_prefix);
277		trace_channels[category].prefix = NULL;
278		}
279
280		if (suffix != NULL && curr_suffix != NULL) {
281		OPENSSL_free(curr_suffix);
282		trace_channels[category].suffix = NULL;
283		}
284
285		if (channel != NULL && curr_channel != NULL) {
286		BIO_free(curr_channel);
287		trace_channels[category].type = 0;
288		trace_channels[category].bio = NULL;
289		}
290
291		/* Before running callbacks are done, set new data where appropriate */
292		if (prefix != NULL && *prefix != NULL) {
293		if ((curr_prefix = OPENSSL_strdup(*prefix)) == NULL)
294		return 0;
295		trace_channels[category].prefix = curr_prefix;
296		}
297
298		if (suffix != NULL && *suffix != NULL) {
299		if ((curr_suffix = OPENSSL_strdup(*suffix)) == NULL)
300		return 0;
301		trace_channels[category].suffix = curr_suffix;
302		}
303
304		if (channel != NULL && *channel != NULL) {
305		trace_channels[category].type = type;
306		trace_channels[category].bio = *channel;
307		/*
308		* This must not be done before setting prefix/suffix,
309		* as those may fail, and then the caller is mislead to free *channel.
310		*/
311		}
312
313		/* Finally, run the attach callback on the new data */
314		if (channel != NULL && *channel != NULL) {
315		attach_cb(category, CHANNEL, *channel);
316		}
317
318		if (prefix != NULL && *prefix != NULL) {
319		attach_cb(category, PREFIX, *prefix);
320		}
321
322		if (suffix != NULL && *suffix != NULL) {
323		attach_cb(category, SUFFIX, *suffix);
324		}
325
326		return 1;
327		}
328
329		static int do_ossl_trace_init(void)
330		{
331		trace_lock = CRYPTO_THREAD_lock_new();
332		return trace_lock != NULL;
333		}
334
335		#endif
336
337		void ossl_trace_cleanup(void)
338	133	{
339		#ifndef OPENSSL_NO_TRACE
340		int category;
341		BIO *channel = NULL;
342		const char *prefix = NULL;
343		const char *suffix = NULL;
344
345		for (category = 0; category < OSSL_TRACE_CATEGORY_NUM; category++) {
346		/* We force the TRACE category to be treated last */
347		if (category == OSSL_TRACE_CATEGORY_TRACE)
348		continue;
349		set_trace_data(category, 0, &channel, &prefix, &suffix,
350		trace_attach_cb, trace_detach_cb);
351		}
352		set_trace_data(OSSL_TRACE_CATEGORY_TRACE, 0, &channel,
353		&prefix, &suffix,
354		trace_attach_cb, trace_detach_cb);
355		CRYPTO_THREAD_lock_free(trace_lock);
356		#endif
357	133	}
358
359		int OSSL_trace_set_channel(int category, BIO *channel)
360	133	{
361		#ifndef OPENSSL_NO_TRACE
362		if (category >= 0 && category < OSSL_TRACE_CATEGORY_NUM)
363		return set_trace_data(category, SIMPLE_CHANNEL, &channel, NULL, NULL,
364		trace_attach_cb, trace_detach_cb);
365		#endif
366	133	return 0;
367	133	}
368
369		#ifndef OPENSSL_NO_TRACE
370		static int trace_attach_w_callback_cb(int category, int type, const void *data)
371		{
372		switch (type) {
373		case CHANNEL:
374		OSSL_TRACE2(TRACE,
375		"Attach channel %p to category '%s' (with callback)\n",
376		data, trace_categories[category].name);
377		break;
378		case PREFIX:
379		OSSL_TRACE2(TRACE, "Attach prefix \"%s\" to category '%s'\n",
380		(const char *)data, trace_categories[category].name);
381		break;
382		case SUFFIX:
383		OSSL_TRACE2(TRACE, "Attach suffix \"%s\" to category '%s'\n",
384		(const char *)data, trace_categories[category].name);
385		break;
386		default: /* No clue */
387		break;
388		}
389		return 1;
390		}
391		#endif
392
393		int OSSL_trace_set_callback(int category, OSSL_trace_cb callback, void *data)
394	0	{
395		#ifndef OPENSSL_NO_TRACE
396		BIO *channel = NULL;
397		struct trace_data_st *trace_data = NULL;
398
399		if (category < 0 \|\| category >= OSSL_TRACE_CATEGORY_NUM)
400		return 0;
401
402		if (callback != NULL) {
403		if ((channel = BIO_new(&trace_method)) == NULL
404		\|\| (trace_data =
405		OPENSSL_zalloc(sizeof(struct trace_data_st))) == NULL)
406		goto err;
407
408		trace_data->callback = callback;
409		trace_data->category = category;
410		trace_data->data = data;
411
412		BIO_set_data(channel, trace_data);
413		}
414
415		if (!set_trace_data(category, CALLBACK_CHANNEL, &channel, NULL, NULL,
416		trace_attach_w_callback_cb, trace_detach_cb))
417		goto err;
418
419		return 1;
420
421		err:
422		BIO_free(channel);
423		OPENSSL_free(trace_data);
424		#endif
425
426	0	return 0;
427	0	}
428
429		int OSSL_trace_set_prefix(int category, const char *prefix)
430	0	{
431		#ifndef OPENSSL_NO_TRACE
432		if (category >= 0 && category < OSSL_TRACE_CATEGORY_NUM)
433		return set_trace_data(category, 0, NULL, &prefix, NULL,
434		trace_attach_cb, trace_detach_cb);
435		#endif
436	0	return 0;
437	0	}
438
439		int OSSL_trace_set_suffix(int category, const char *suffix)
440	0	{
441		#ifndef OPENSSL_NO_TRACE
442		if (category >= 0 && category < OSSL_TRACE_CATEGORY_NUM)
443		return set_trace_data(category, 0, NULL, NULL, &suffix,
444		trace_attach_cb, trace_detach_cb);
445		#endif
446	0	return 0;
447	0	}
448
449		#ifndef OPENSSL_NO_TRACE
450		static int ossl_trace_get_category(int category)
451		{
452		if (category < 0 \|\| category >= OSSL_TRACE_CATEGORY_NUM)
453		return -1;
454		if (trace_channels[category].bio != NULL)
455		return category;
456		return OSSL_TRACE_CATEGORY_ALL;
457		}
458		#endif
459
460		int OSSL_trace_enabled(int category)
461	0	{
462	0	int ret = 0;
463		#ifndef OPENSSL_NO_TRACE
464		category = ossl_trace_get_category(category);
465		if (category >= 0)
466		ret = trace_channels[category].bio != NULL;
467		#endif
468	0	return ret;
469	0	}
470
471		BIO *OSSL_trace_begin(int category)
472	0	{
473	0	BIO *channel = NULL;
474		#ifndef OPENSSL_NO_TRACE
475		char *prefix = NULL;
476
477		category = ossl_trace_get_category(category);
478		if (category < 0 \|\| !OSSL_trace_enabled(category))
479		return NULL;
480
481		channel = trace_channels[category].bio;
482		prefix = trace_channels[category].prefix;
483
484		if (channel != NULL) {
485		if (!CRYPTO_THREAD_write_lock(trace_lock))
486		return NULL;
487		current_channel = channel;
488		switch (trace_channels[category].type) {
489		case SIMPLE_CHANNEL:
490		if (prefix != NULL) {
491		(void)BIO_puts(channel, prefix);
492		(void)BIO_puts(channel, "\n");
493		}
494		break;
495		case CALLBACK_CHANNEL:
496		(void)BIO_ctrl(channel, OSSL_TRACE_CTRL_BEGIN,
497		prefix == NULL ? 0 : strlen(prefix), prefix);
498		break;
499		}
500		}
501		#endif
502	0	return channel;
503	0	}
504
505		void OSSL_trace_end(int category, BIO *channel)
506	0	{
507		#ifndef OPENSSL_NO_TRACE
508		char *suffix = NULL;
509
510		category = ossl_trace_get_category(category);
511		if (category < 0)
512		return;
513		suffix = trace_channels[category].suffix;
514		if (channel != NULL
515		&& ossl_assert(channel == current_channel)) {
516		(void)BIO_flush(channel);
517		switch (trace_channels[category].type) {
518		case SIMPLE_CHANNEL:
519		if (suffix != NULL) {
520		(void)BIO_puts(channel, suffix);
521		(void)BIO_puts(channel, "\n");
522		}
523		break;
524		case CALLBACK_CHANNEL:
525		(void)BIO_ctrl(channel, OSSL_TRACE_CTRL_END,
526		suffix == NULL ? 0 : strlen(suffix), suffix);
527		break;
528		}
529		current_channel = NULL;
530		CRYPTO_THREAD_unlock(trace_lock);
531		}
532		#endif
533	0	}
534
535		int OSSL_trace_string(BIO *out, int text, int full,
536		const unsigned char *data, size_t size)
537	0	{
538	0	unsigned char buf[OSSL_TRACE_STRING_MAX + 1];
539	0	int len, i;
540
541	0	if (!full && size > OSSL_TRACE_STRING_MAX) {
542	0	BIO_printf(out, "[len %zu limited to %d]: ",
543	0	size, OSSL_TRACE_STRING_MAX);
544	0	len = OSSL_TRACE_STRING_MAX;
545	0	} else {
546	0	len = (int)size;
547	0	}
548	0	if (!text) { /* mask control characters while preserving newlines */
549	0	for (i = 0; i < len; i++, data++)
550	0	buf[i] = (char)data != '\n' && ossl_iscntrl((int)data)
551	0	? ' ' : *data;
552	0	if (len == 0 \|\| data[-1] != '\n')
553	0	buf[len++] = '\n';
554	0	data = buf;
555	0	}
556	0	return BIO_printf(out, "%.*s", len, data);
557	0	}