558 lines
16 KiB
C
558 lines
16 KiB
C
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/*
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* Copyright 2019-2023 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 <stdio.h>
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#include <string.h>
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#include "internal/thread_once.h"
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#include <openssl/bio.h>
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#include <openssl/crypto.h>
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#include <openssl/trace.h>
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#include "internal/bio.h"
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#include "internal/nelem.h"
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#include "internal/refcount.h"
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#include "crypto/cryptlib.h"
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#include "crypto/ctype.h"
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#ifndef OPENSSL_NO_TRACE
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static CRYPTO_RWLOCK *trace_lock = NULL;
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static const BIO *current_channel = NULL;
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/*-
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* INTERNAL TRACE CHANNEL IMPLEMENTATION
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*
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* For our own flexibility, all trace categories are associated with a
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* BIO sink object, also called the trace channel. Instead of a BIO object,
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* the application can also provide a callback function, in which case an
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* internal trace channel is attached, which simply calls the registered
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* callback function.
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*/
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static int trace_write(BIO *b, const char *buf,
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size_t num, size_t *written);
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static int trace_puts(BIO *b, const char *str);
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static long trace_ctrl(BIO *channel, int cmd, long argl, void *argp);
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static int trace_free(BIO *b);
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static const BIO_METHOD trace_method = {
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BIO_TYPE_SOURCE_SINK,
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"trace",
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trace_write,
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NULL, /* old write */
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NULL, /* read_ex */
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NULL, /* read */
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trace_puts,
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NULL, /* gets */
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trace_ctrl, /* ctrl */
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NULL, /* create */
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trace_free, /* free */
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NULL, /* callback_ctrl */
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};
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struct trace_data_st {
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OSSL_trace_cb callback;
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int category;
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void *data;
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};
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static int trace_write(BIO *channel,
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const char *buf, size_t num, size_t *written)
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{
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struct trace_data_st *ctx = BIO_get_data(channel);
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size_t cnt = ctx->callback(buf, num, ctx->category, OSSL_TRACE_CTRL_WRITE,
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ctx->data);
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*written = cnt;
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return cnt != 0;
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}
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static int trace_puts(BIO *channel, const char *str)
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{
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size_t written;
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if (trace_write(channel, str, strlen(str), &written))
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return (int)written;
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return EOF;
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}
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static long trace_ctrl(BIO *channel, int cmd, long argl, void *argp)
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{
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struct trace_data_st *ctx = BIO_get_data(channel);
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switch (cmd) {
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case OSSL_TRACE_CTRL_BEGIN:
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case OSSL_TRACE_CTRL_END:
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/* We know that the callback is likely to return 0 here */
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ctx->callback("", 0, ctx->category, cmd, ctx->data);
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return 1;
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default:
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break;
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}
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return -2; /* Unsupported */
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}
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static int trace_free(BIO *channel)
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{
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if (channel == NULL)
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return 0;
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OPENSSL_free(BIO_get_data(channel));
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return 1;
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}
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#endif
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/*-
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* TRACE
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*/
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/* Helper struct and macro to get name string to number mapping */
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struct trace_category_st {
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const char * const name;
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const int num;
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};
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#define TRACE_CATEGORY_(name) { #name, OSSL_TRACE_CATEGORY_##name }
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static const struct trace_category_st
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trace_categories[OSSL_TRACE_CATEGORY_NUM] = {
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TRACE_CATEGORY_(ALL),
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TRACE_CATEGORY_(TRACE),
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TRACE_CATEGORY_(INIT),
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TRACE_CATEGORY_(TLS),
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TRACE_CATEGORY_(TLS_CIPHER),
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TRACE_CATEGORY_(CONF),
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TRACE_CATEGORY_(ENGINE_TABLE),
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TRACE_CATEGORY_(ENGINE_REF_COUNT),
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TRACE_CATEGORY_(PKCS5V2),
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TRACE_CATEGORY_(PKCS12_KEYGEN),
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TRACE_CATEGORY_(PKCS12_DECRYPT),
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TRACE_CATEGORY_(X509V3_POLICY),
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TRACE_CATEGORY_(BN_CTX),
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TRACE_CATEGORY_(CMP),
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TRACE_CATEGORY_(STORE),
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TRACE_CATEGORY_(DECODER),
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TRACE_CATEGORY_(ENCODER),
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TRACE_CATEGORY_(REF_COUNT),
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TRACE_CATEGORY_(HTTP),
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}; /* KEEP THIS LIST IN SYNC with #define OSSL_TRACE_CATEGORY_... in trace.h */
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const char *OSSL_trace_get_category_name(int num)
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{
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if (num < 0 || (size_t)num >= OSSL_NELEM(trace_categories))
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return NULL;
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/*
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* Partial check that OSSL_TRACE_CATEGORY_... macros
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* are synced with trace_categories array
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*/
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if (!ossl_assert(trace_categories[num].name != NULL)
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|| !ossl_assert(trace_categories[num].num == num))
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return NULL;
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return trace_categories[num].name;
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}
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int OSSL_trace_get_category_num(const char *name)
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{
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size_t i;
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if (name == NULL)
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return -1;
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for (i = 0; i < OSSL_NELEM(trace_categories); i++)
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if (OPENSSL_strcasecmp(name, trace_categories[i].name) == 0)
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return trace_categories[i].num;
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return -1; /* not found */
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}
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#ifndef OPENSSL_NO_TRACE
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/* We use one trace channel for each trace category */
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static struct {
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enum { SIMPLE_CHANNEL, CALLBACK_CHANNEL } type;
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BIO *bio;
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char *prefix;
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char *suffix;
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} trace_channels[OSSL_TRACE_CATEGORY_NUM] = {
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{ 0, NULL, NULL, NULL },
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};
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#endif
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#ifndef OPENSSL_NO_TRACE
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enum {
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CHANNEL,
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PREFIX,
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SUFFIX
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};
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static int trace_attach_cb(int category, int type, const void *data)
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{
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switch (type) {
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case CHANNEL:
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OSSL_TRACE2(TRACE, "Attach channel %p to category '%s'\n",
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data, trace_categories[category].name);
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break;
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case PREFIX:
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OSSL_TRACE2(TRACE, "Attach prefix \"%s\" to category '%s'\n",
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(const char *)data, trace_categories[category].name);
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break;
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case SUFFIX:
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OSSL_TRACE2(TRACE, "Attach suffix \"%s\" to category '%s'\n",
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(const char *)data, trace_categories[category].name);
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break;
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default: /* No clue */
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break;
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}
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return 1;
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}
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static int trace_detach_cb(int category, int type, const void *data)
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{
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switch (type) {
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case CHANNEL:
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OSSL_TRACE2(TRACE, "Detach channel %p from category '%s'\n",
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data, trace_categories[category].name);
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break;
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case PREFIX:
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OSSL_TRACE2(TRACE, "Detach prefix \"%s\" from category '%s'\n",
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(const char *)data, trace_categories[category].name);
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break;
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case SUFFIX:
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OSSL_TRACE2(TRACE, "Detach suffix \"%s\" from category '%s'\n",
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(const char *)data, trace_categories[category].name);
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break;
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default: /* No clue */
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break;
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}
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return 1;
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}
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static int do_ossl_trace_init(void);
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static CRYPTO_ONCE trace_inited = CRYPTO_ONCE_STATIC_INIT;
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DEFINE_RUN_ONCE_STATIC(ossl_trace_init)
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{
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return do_ossl_trace_init();
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}
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static int set_trace_data(int category, int type, BIO **channel,
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const char **prefix, const char **suffix,
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int (*attach_cb)(int, int, const void *),
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int (*detach_cb)(int, int, const void *))
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{
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BIO *curr_channel = NULL;
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char *curr_prefix = NULL;
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char *curr_suffix = NULL;
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/* Ensure do_ossl_trace_init() is called once */
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if (!RUN_ONCE(&trace_inited, ossl_trace_init))
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return 0;
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curr_channel = trace_channels[category].bio;
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curr_prefix = trace_channels[category].prefix;
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curr_suffix = trace_channels[category].suffix;
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/* Make sure to run the detach callback first on all data */
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if (prefix != NULL && curr_prefix != NULL) {
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detach_cb(category, PREFIX, curr_prefix);
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}
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if (suffix != NULL && curr_suffix != NULL) {
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detach_cb(category, SUFFIX, curr_suffix);
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}
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if (channel != NULL && curr_channel != NULL) {
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detach_cb(category, CHANNEL, curr_channel);
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}
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/* After detach callbacks are done, clear data where appropriate */
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if (prefix != NULL && curr_prefix != NULL) {
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OPENSSL_free(curr_prefix);
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trace_channels[category].prefix = NULL;
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}
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if (suffix != NULL && curr_suffix != NULL) {
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OPENSSL_free(curr_suffix);
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trace_channels[category].suffix = NULL;
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}
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if (channel != NULL && curr_channel != NULL) {
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BIO_free(curr_channel);
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trace_channels[category].type = 0;
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trace_channels[category].bio = NULL;
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}
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/* Before running callbacks are done, set new data where appropriate */
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if (prefix != NULL && *prefix != NULL) {
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if ((curr_prefix = OPENSSL_strdup(*prefix)) == NULL)
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return 0;
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trace_channels[category].prefix = curr_prefix;
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}
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if (suffix != NULL && *suffix != NULL) {
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if ((curr_suffix = OPENSSL_strdup(*suffix)) == NULL)
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return 0;
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trace_channels[category].suffix = curr_suffix;
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}
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if (channel != NULL && *channel != NULL) {
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trace_channels[category].type = type;
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trace_channels[category].bio = *channel;
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/*
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* This must not be done before setting prefix/suffix,
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* as those may fail, and then the caller is mislead to free *channel.
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*/
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}
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/* Finally, run the attach callback on the new data */
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if (channel != NULL && *channel != NULL) {
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attach_cb(category, CHANNEL, *channel);
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}
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if (prefix != NULL && *prefix != NULL) {
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attach_cb(category, PREFIX, *prefix);
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}
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if (suffix != NULL && *suffix != NULL) {
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attach_cb(category, SUFFIX, *suffix);
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}
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return 1;
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}
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static int do_ossl_trace_init(void)
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{
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trace_lock = CRYPTO_THREAD_lock_new();
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return trace_lock != NULL;
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}
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#endif
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void ossl_trace_cleanup(void)
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{
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#ifndef OPENSSL_NO_TRACE
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int category;
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BIO *channel = NULL;
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const char *prefix = NULL;
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const char *suffix = NULL;
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for (category = 0; category < OSSL_TRACE_CATEGORY_NUM; category++) {
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/* We force the TRACE category to be treated last */
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if (category == OSSL_TRACE_CATEGORY_TRACE)
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continue;
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set_trace_data(category, 0, &channel, &prefix, &suffix,
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trace_attach_cb, trace_detach_cb);
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}
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set_trace_data(OSSL_TRACE_CATEGORY_TRACE, 0, &channel,
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&prefix, &suffix,
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trace_attach_cb, trace_detach_cb);
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CRYPTO_THREAD_lock_free(trace_lock);
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#endif
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}
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int OSSL_trace_set_channel(int category, BIO *channel)
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{
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#ifndef OPENSSL_NO_TRACE
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if (category >= 0 && category < OSSL_TRACE_CATEGORY_NUM)
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return set_trace_data(category, SIMPLE_CHANNEL, &channel, NULL, NULL,
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trace_attach_cb, trace_detach_cb);
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#endif
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return 0;
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}
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#ifndef OPENSSL_NO_TRACE
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static int trace_attach_w_callback_cb(int category, int type, const void *data)
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{
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switch (type) {
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case CHANNEL:
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OSSL_TRACE2(TRACE,
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"Attach channel %p to category '%s' (with callback)\n",
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data, trace_categories[category].name);
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break;
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case PREFIX:
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OSSL_TRACE2(TRACE, "Attach prefix \"%s\" to category '%s'\n",
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(const char *)data, trace_categories[category].name);
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break;
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case SUFFIX:
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OSSL_TRACE2(TRACE, "Attach suffix \"%s\" to category '%s'\n",
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|
|
(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)
|
||
|
|
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);
|
||
|
|
}
|