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openssl/apps/openssl.c

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/*
* Copyright 1995-2021 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
*/
#include <stdio.h>
#include <stdlib.h>
#include "internal/cryptlib.h"
#include <openssl/bio.h>
#include <openssl/crypto.h>
#include <openssl/trace.h>
#include <openssl/lhash.h>
#include <openssl/conf.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>
#ifndef OPENSSL_NO_ENGINE
# include <openssl/engine.h>
#endif
#include <openssl/err.h>
/* Needed to get the other O_xxx flags. */
#ifdef OPENSSL_SYS_VMS
# include <unixio.h>
#endif
#include "apps.h"
#include "progs.h"
/*
* The LHASH callbacks ("hash" & "cmp") have been replaced by functions with
* the base prototypes (we cast each variable inside the function to the
* required type of "FUNCTION*"). This removes the necessity for
* macro-generated wrapper functions.
*/
static LHASH_OF(FUNCTION) *prog_init(void);
static int do_cmd(LHASH_OF(FUNCTION) *prog, int argc, char *argv[]);
char *default_config_file = NULL;
BIO *bio_in = NULL;
BIO *bio_out = NULL;
BIO *bio_err = NULL;
static void warn_deprecated(const FUNCTION *fp)
{
if (fp->deprecated_version != NULL)
BIO_printf(bio_err, "The command %s was deprecated in version %s.",
fp->name, fp->deprecated_version);
else
BIO_printf(bio_err, "The command %s is deprecated.", fp->name);
if (strcmp(fp->deprecated_alternative, DEPRECATED_NO_ALTERNATIVE) != 0)
BIO_printf(bio_err, " Use '%s' instead.", fp->deprecated_alternative);
BIO_printf(bio_err, "\n");
}
static int apps_startup(void)
{
const char *use_libctx = NULL;
#ifdef SIGPIPE
signal(SIGPIPE, SIG_IGN);
#endif
/* Set non-default library initialisation settings */
if (!OPENSSL_init_ssl(OPENSSL_INIT_ENGINE_ALL_BUILTIN
| OPENSSL_INIT_LOAD_CONFIG, NULL))
return 0;
(void)setup_ui_method();
(void)setup_engine_loader();
/*
* NOTE: This is an undocumented feature required for testing only.
* There are no guarantees that it will exist in future builds.
*/
use_libctx = getenv("OPENSSL_TEST_LIBCTX");
if (use_libctx != NULL) {
/* Set this to "1" to create a global libctx */
if (strcmp(use_libctx, "1") == 0) {
if (app_create_libctx() == NULL)
return 0;
}
}
return 1;
}
static void apps_shutdown(void)
{
app_providers_cleanup();
OSSL_LIB_CTX_free(app_get0_libctx());
destroy_engine_loader();
destroy_ui_method();
}
#ifndef OPENSSL_NO_TRACE
typedef struct tracedata_st {
BIO *bio;
unsigned int ingroup:1;
} tracedata;
static size_t internal_trace_cb(const char *buf, size_t cnt,
int category, int cmd, void *vdata)
{
int ret = 0;
tracedata *trace_data = vdata;
char buffer[256], *hex;
CRYPTO_THREAD_ID tid;
switch (cmd) {
case OSSL_TRACE_CTRL_BEGIN:
if (trace_data->ingroup) {
BIO_printf(bio_err, "ERROR: tracing already started\n");
return 0;
}
trace_data->ingroup = 1;
tid = CRYPTO_THREAD_get_current_id();
hex = OPENSSL_buf2hexstr((const unsigned char *)&tid, sizeof(tid));
BIO_snprintf(buffer, sizeof(buffer), "TRACE[%s]:%s: ",
hex == NULL ? "<null>" : hex,
OSSL_trace_get_category_name(category));
OPENSSL_free(hex);
BIO_set_prefix(trace_data->bio, buffer);
break;
case OSSL_TRACE_CTRL_WRITE:
if (!trace_data->ingroup) {
BIO_printf(bio_err, "ERROR: writing when tracing not started\n");
return 0;
}
ret = BIO_write(trace_data->bio, buf, cnt);
break;
case OSSL_TRACE_CTRL_END:
if (!trace_data->ingroup) {
BIO_printf(bio_err, "ERROR: finishing when tracing not started\n");
return 0;
}
trace_data->ingroup = 0;
BIO_set_prefix(trace_data->bio, NULL);
break;
}
return ret < 0 ? 0 : ret;
}
DEFINE_STACK_OF(tracedata)
static STACK_OF(tracedata) *trace_data_stack;
static void tracedata_free(tracedata *data)
{
BIO_free_all(data->bio);
OPENSSL_free(data);
}
static STACK_OF(tracedata) *trace_data_stack;
static void cleanup_trace(void)
{
sk_tracedata_pop_free(trace_data_stack, tracedata_free);
}
static void setup_trace_category(int category)
{
BIO *channel;
tracedata *trace_data;
BIO *bio = NULL;
if (OSSL_trace_enabled(category))
return;
bio = BIO_new(BIO_f_prefix());
channel = BIO_push(bio, dup_bio_err(FORMAT_TEXT));
trace_data = OPENSSL_zalloc(sizeof(*trace_data));
if (trace_data == NULL
|| bio == NULL
|| (trace_data->bio = channel) == NULL
|| OSSL_trace_set_callback(category, internal_trace_cb,
trace_data) == 0
|| sk_tracedata_push(trace_data_stack, trace_data) == 0) {
fprintf(stderr,
"warning: unable to setup trace callback for category '%s'.\n",
OSSL_trace_get_category_name(category));
OSSL_trace_set_callback(category, NULL, NULL);
BIO_free_all(channel);
}
}
static void setup_trace(const char *str)
{
char *val;
/*
* We add this handler as early as possible to ensure it's executed
* as late as possible, i.e. after the TRACE code has done its cleanup
* (which happens last in OPENSSL_cleanup).
*/
atexit(cleanup_trace);
trace_data_stack = sk_tracedata_new_null();
val = OPENSSL_strdup(str);
if (val != NULL) {
char *valp = val;
char *item;
for (valp = val; (item = strtok(valp, ",")) != NULL; valp = NULL) {
int category = OSSL_trace_get_category_num(item);
if (category == OSSL_TRACE_CATEGORY_ALL) {
while (++category < OSSL_TRACE_CATEGORY_NUM)
setup_trace_category(category);
break;
} else if (category > 0) {
setup_trace_category(category);
} else {
fprintf(stderr,
"warning: unknown trace category: '%s'.\n", item);
}
}
}
OPENSSL_free(val);
}
#endif /* OPENSSL_NO_TRACE */
static char *help_argv[] = { "help", NULL };
int main(int argc, char *argv[])
{
FUNCTION f, *fp;
LHASH_OF(FUNCTION) *prog = NULL;
char *pname;
const char *fname;
ARGS arg;
int global_help = 0;
int ret = 0;
arg.argv = NULL;
arg.size = 0;
/* Set up some of the environment. */
bio_in = dup_bio_in(FORMAT_TEXT);
bio_out = dup_bio_out(FORMAT_TEXT);
bio_err = dup_bio_err(FORMAT_TEXT);
#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
argv = copy_argv(&argc, argv);
#elif defined(_WIN32)
/* Replace argv[] with UTF-8 encoded strings. */
win32_utf8argv(&argc, &argv);
#endif
#ifndef OPENSSL_NO_TRACE
setup_trace(getenv("OPENSSL_TRACE"));
#endif
if ((fname = "apps_startup", !apps_startup())
|| (fname = "prog_init", (prog = prog_init()) == NULL)) {
BIO_printf(bio_err,
"FATAL: Startup failure (dev note: %s()) for %s\n",
fname, argv[0]);
ERR_print_errors(bio_err);
ret = 1;
goto end;
}
pname = opt_progname(argv[0]);
default_config_file = CONF_get1_default_config_file();
if (default_config_file == NULL)
app_bail_out("%s: could not get default config file\n", pname);
/* first check the program name */
f.name = pname;
fp = lh_FUNCTION_retrieve(prog, &f);
if (fp == NULL) {
/* We assume we've been called as 'openssl ...' */
global_help = argc > 1
&& (strcmp(argv[1], "-help") == 0 || strcmp(argv[1], "--help") == 0
|| strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--h") == 0);
argc--;
argv++;
opt_appname(argc == 1 || global_help ? "help" : argv[0]);
} else {
argv[0] = pname;
}
/* If there's a command, run with that, otherwise "help". */
ret = argc == 0 || global_help
? do_cmd(prog, 1, help_argv)
: do_cmd(prog, argc, argv);
end:
OPENSSL_free(default_config_file);
lh_FUNCTION_free(prog);
OPENSSL_free(arg.argv);
if (!app_RAND_write())
ret = EXIT_FAILURE;
BIO_free(bio_in);
BIO_free_all(bio_out);
apps_shutdown();
BIO_free(bio_err);
EXIT(ret);
}
typedef enum HELP_CHOICE {
OPT_hERR = -1, OPT_hEOF = 0, OPT_hHELP
} HELP_CHOICE;
const OPTIONS help_options[] = {
{OPT_HELP_STR, 1, '-', "Usage: help [options] [command]\n"},
OPT_SECTION("General"),
{"help", OPT_hHELP, '-', "Display this summary"},
OPT_PARAMETERS(),
{"command", 0, 0, "Name of command to display help (optional)"},
{NULL}
};
int help_main(int argc, char **argv)
{
FUNCTION *fp;
int i, nl;
FUNC_TYPE tp;
char *prog;
HELP_CHOICE o;
DISPLAY_COLUMNS dc;
char *new_argv[3];
prog = opt_init(argc, argv, help_options);
while ((o = opt_next()) != OPT_hEOF) {
switch (o) {
case OPT_hERR:
case OPT_hEOF:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
return 1;
case OPT_hHELP:
opt_help(help_options);
return 0;
}
}
/* One optional argument, the command to get help for. */
if (opt_num_rest() == 1) {
new_argv[0] = opt_rest()[0];
new_argv[1] = "--help";
new_argv[2] = NULL;
return do_cmd(prog_init(), 2, new_argv);
}
if (opt_num_rest() != 0) {
BIO_printf(bio_err, "Usage: %s\n", prog);
return 1;
}
calculate_columns(functions, &dc);
BIO_printf(bio_err, "%s:\n\nStandard commands", prog);
i = 0;
tp = FT_none;
for (fp = functions; fp->name != NULL; fp++) {
nl = 0;
if (i++ % dc.columns == 0) {
BIO_printf(bio_err, "\n");
nl = 1;
}
if (fp->type != tp) {
tp = fp->type;
if (!nl)
BIO_printf(bio_err, "\n");
if (tp == FT_md) {
i = 1;
BIO_printf(bio_err,
"\nMessage Digest commands (see the `dgst' command for more details)\n");
} else if (tp == FT_cipher) {
i = 1;
BIO_printf(bio_err,
"\nCipher commands (see the `enc' command for more details)\n");
}
}
BIO_printf(bio_err, "%-*s", dc.width, fp->name);
}
BIO_printf(bio_err, "\n\n");
return 0;
}
static int do_cmd(LHASH_OF(FUNCTION) *prog, int argc, char *argv[])
{
FUNCTION f, *fp;
if (argc <= 0 || argv[0] == NULL)
return 0;
memset(&f, 0, sizeof(f));
f.name = argv[0];
fp = lh_FUNCTION_retrieve(prog, &f);
if (fp == NULL) {
if (EVP_get_digestbyname(argv[0])) {
f.type = FT_md;
f.func = dgst_main;
fp = &f;
} else if (EVP_get_cipherbyname(argv[0])) {
f.type = FT_cipher;
f.func = enc_main;
fp = &f;
}
}
if (fp != NULL) {
if (fp->deprecated_alternative != NULL)
warn_deprecated(fp);
return fp->func(argc, argv);
}
f.name = argv[0];
if (CHECK_AND_SKIP_PREFIX(f.name, "no-")) {
/*
* User is asking if foo is unsupported, by trying to "run" the
* no-foo command. Strange.
*/
if (lh_FUNCTION_retrieve(prog, &f) == NULL) {
BIO_printf(bio_out, "%s\n", argv[0]);
return 0;
}
BIO_printf(bio_out, "%s\n", argv[0] + 3);
return 1;
}
BIO_printf(bio_err, "Invalid command '%s'; type \"help\" for a list.\n",
argv[0]);
return 1;
}
static int function_cmp(const FUNCTION * a, const FUNCTION * b)
{
return strncmp(a->name, b->name, 8);
}
static unsigned long function_hash(const FUNCTION * a)
{
return OPENSSL_LH_strhash(a->name);
}
static int SortFnByName(const void *_f1, const void *_f2)
{
const FUNCTION *f1 = _f1;
const FUNCTION *f2 = _f2;
if (f1->type != f2->type)
return f1->type - f2->type;
return strcmp(f1->name, f2->name);
}
static LHASH_OF(FUNCTION) *prog_init(void)
{
static LHASH_OF(FUNCTION) *ret = NULL;
static int prog_inited = 0;
FUNCTION *f;
size_t i;
if (prog_inited)
return ret;
prog_inited = 1;
/* Sort alphabetically within category. For nicer help displays. */
for (i = 0, f = functions; f->name != NULL; ++f, ++i)
;
qsort(functions, i, sizeof(*functions), SortFnByName);
if ((ret = lh_FUNCTION_new(function_hash, function_cmp)) == NULL)
return NULL;
for (f = functions; f->name != NULL; f++)
(void)lh_FUNCTION_insert(ret, f);
return ret;
}
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