mirror of https://github.com/openssl/openssl.git
146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/*
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* Copyright 2017-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <string.h>
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#include <openssl/opensslconf.h>
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#include <openssl/trace.h>
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#include "apps.h"
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#include "../testutil.h"
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#ifndef OPENSSL_NO_TRACE
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typedef struct tracedata_st {
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BIO *bio;
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unsigned int ingroup:1;
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} tracedata;
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static size_t internal_trace_cb(const char *buf, size_t cnt,
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int category, int cmd, void *vdata)
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{
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int ret = 0;
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tracedata *trace_data = vdata;
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char buffer[256], *hex;
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CRYPTO_THREAD_ID tid;
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switch (cmd) {
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case OSSL_TRACE_CTRL_BEGIN:
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trace_data->ingroup = 1;
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tid = CRYPTO_THREAD_get_current_id();
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hex = OPENSSL_buf2hexstr((const unsigned char *)&tid, sizeof(tid));
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BIO_snprintf(buffer, sizeof(buffer), "TRACE[%s]:%s: ",
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hex, OSSL_trace_get_category_name(category));
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OPENSSL_free(hex);
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BIO_set_prefix(trace_data->bio, buffer);
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break;
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case OSSL_TRACE_CTRL_WRITE:
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ret = BIO_write(trace_data->bio, buf, cnt);
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break;
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case OSSL_TRACE_CTRL_END:
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trace_data->ingroup = 0;
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BIO_set_prefix(trace_data->bio, NULL);
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break;
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}
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return ret < 0 ? 0 : ret;
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}
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DEFINE_STACK_OF(tracedata)
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static STACK_OF(tracedata) *trace_data_stack;
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static void tracedata_free(tracedata *data)
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{
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BIO_free_all(data->bio);
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OPENSSL_free(data);
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}
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static STACK_OF(tracedata) *trace_data_stack;
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static void cleanup_trace(void)
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{
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sk_tracedata_pop_free(trace_data_stack, tracedata_free);
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}
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static void setup_trace_category(int category)
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{
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BIO *channel;
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tracedata *trace_data;
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BIO *bio = NULL;
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if (OSSL_trace_enabled(category))
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return;
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bio = BIO_new(BIO_f_prefix());
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channel = BIO_push(bio,
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BIO_new_fp(stderr, BIO_NOCLOSE | BIO_FP_TEXT));
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trace_data = OPENSSL_zalloc(sizeof(*trace_data));
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if (trace_data == NULL
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|| bio == NULL
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|| (trace_data->bio = channel) == NULL
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|| OSSL_trace_set_callback(category, internal_trace_cb,
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trace_data) == 0
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|| sk_tracedata_push(trace_data_stack, trace_data) == 0) {
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fprintf(stderr,
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"warning: unable to setup trace callback for category '%s'.\n",
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OSSL_trace_get_category_name(category));
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OSSL_trace_set_callback(category, NULL, NULL);
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BIO_free_all(channel);
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}
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}
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static void setup_trace(const char *str)
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{
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char *val;
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/*
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* We add this handler as early as possible to ensure it's executed
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* as late as possible, i.e. after the TRACE code has done its cleanup
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* (which happens last in OPENSSL_cleanup).
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*/
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atexit(cleanup_trace);
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trace_data_stack = sk_tracedata_new_null();
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val = OPENSSL_strdup(str);
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if (val != NULL) {
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char *valp = val;
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char *item;
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for (valp = val; (item = strtok(valp, ",")) != NULL; valp = NULL) {
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int category = OSSL_trace_get_category_num(item);
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if (category == OSSL_TRACE_CATEGORY_ALL) {
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while (++category < OSSL_TRACE_CATEGORY_NUM)
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setup_trace_category(category);
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break;
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} else if (category > 0) {
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setup_trace_category(category);
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} else {
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fprintf(stderr,
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"warning: unknown trace category: '%s'.\n", item);
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}
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}
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}
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OPENSSL_free(val);
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}
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#endif /* OPENSSL_NO_TRACE */
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int global_init(void)
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{
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#ifndef OPENSSL_NO_TRACE
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setup_trace(getenv("OPENSSL_TRACE"));
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#endif
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return 1;
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}
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