485 lines
16 KiB
C
485 lines
16 KiB
C
/*
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* Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (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 <openssl/opensslconf.h>
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#include "apps.h"
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#include "progs.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/err.h>
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#include <openssl/engine.h>
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#include <openssl/ssl.h>
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#include <openssl/store.h>
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typedef enum OPTION_choice {
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OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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OPT_C, OPT_T, OPT_TT, OPT_PRE, OPT_POST,
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OPT_V = 100, OPT_VV, OPT_VVV, OPT_VVVV
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} OPTION_CHOICE;
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const OPTIONS engine_options[] = {
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{OPT_HELP_STR, 1, '-', "Usage: %s [options] engine...\n"},
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{OPT_HELP_STR, 1, '-',
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" engine... Engines to load\n"},
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{"help", OPT_HELP, '-', "Display this summary"},
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{"v", OPT_V, '-', "List 'control commands' For each specified engine"},
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{"vv", OPT_VV, '-', "Also display each command's description"},
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{"vvv", OPT_VVV, '-', "Also add the input flags for each command"},
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{"vvvv", OPT_VVVV, '-', "Also show internal input flags"},
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{"c", OPT_C, '-', "List the capabilities of specified engine"},
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{"t", OPT_T, '-', "Check that specified engine is available"},
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{"tt", OPT_TT, '-', "Display error trace for unavailable engines"},
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{"pre", OPT_PRE, 's', "Run command against the ENGINE before loading it"},
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{"post", OPT_POST, 's', "Run command against the ENGINE after loading it"},
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{OPT_MORE_STR, OPT_EOF, 1,
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"Commands are like \"SO_PATH:/lib/libdriver.so\""},
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{NULL}
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};
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static int append_buf(char **buf, int *size, const char *s)
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{
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const int expand = 256;
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int len = strlen(s) + 1;
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char *p = *buf;
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if (p == NULL) {
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*size = ((len + expand - 1) / expand) * expand;
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p = *buf = app_malloc(*size, "engine buffer");
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} else {
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const int blen = strlen(p);
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if (blen > 0)
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len += 2 + blen;
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if (len > *size) {
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*size = ((len + expand - 1) / expand) * expand;
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p = OPENSSL_realloc(p, *size);
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if (p == NULL) {
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OPENSSL_free(*buf);
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*buf = NULL;
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return 0;
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}
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*buf = p;
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}
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if (blen > 0) {
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p += blen;
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*p++ = ',';
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*p++ = ' ';
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}
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}
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strcpy(p, s);
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return 1;
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}
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static int util_flags(BIO *out, unsigned int flags, const char *indent)
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{
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int started = 0, err = 0;
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/* Indent before displaying input flags */
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BIO_printf(out, "%s%s(input flags): ", indent, indent);
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if (flags == 0) {
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BIO_printf(out, "<no flags>\n");
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return 1;
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}
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/*
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* If the object is internal, mark it in a way that shows instead of
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* having it part of all the other flags, even if it really is.
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*/
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if (flags & ENGINE_CMD_FLAG_INTERNAL) {
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BIO_printf(out, "[Internal] ");
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}
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if (flags & ENGINE_CMD_FLAG_NUMERIC) {
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BIO_printf(out, "NUMERIC");
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started = 1;
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}
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/*
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* Now we check that no combinations of the mutually exclusive NUMERIC,
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* STRING, and NO_INPUT flags have been used. Future flags that can be
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* OR'd together with these would need to added after these to preserve
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* the testing logic.
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*/
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if (flags & ENGINE_CMD_FLAG_STRING) {
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if (started) {
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BIO_printf(out, "|");
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err = 1;
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}
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BIO_printf(out, "STRING");
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started = 1;
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}
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if (flags & ENGINE_CMD_FLAG_NO_INPUT) {
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if (started) {
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BIO_printf(out, "|");
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err = 1;
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}
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BIO_printf(out, "NO_INPUT");
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started = 1;
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}
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/* Check for unknown flags */
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flags = flags & ~ENGINE_CMD_FLAG_NUMERIC &
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~ENGINE_CMD_FLAG_STRING &
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~ENGINE_CMD_FLAG_NO_INPUT & ~ENGINE_CMD_FLAG_INTERNAL;
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if (flags) {
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if (started)
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BIO_printf(out, "|");
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BIO_printf(out, "<0x%04X>", flags);
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}
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if (err)
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BIO_printf(out, " <illegal flags!>");
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BIO_printf(out, "\n");
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return 1;
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}
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static int util_verbose(ENGINE *e, int verbose, BIO *out, const char *indent)
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{
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static const int line_wrap = 78;
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int num;
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int ret = 0;
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char *name = NULL;
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char *desc = NULL;
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int flags;
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int xpos = 0;
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STACK_OF(OPENSSL_STRING) *cmds = NULL;
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if (!ENGINE_ctrl(e, ENGINE_CTRL_HAS_CTRL_FUNCTION, 0, NULL, NULL) ||
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((num = ENGINE_ctrl(e, ENGINE_CTRL_GET_FIRST_CMD_TYPE,
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0, NULL, NULL)) <= 0)) {
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return 1;
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}
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cmds = sk_OPENSSL_STRING_new_null();
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if (cmds == NULL)
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goto err;
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do {
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int len;
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/* Get the command input flags */
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if ((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, num,
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NULL, NULL)) < 0)
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goto err;
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if (!(flags & ENGINE_CMD_FLAG_INTERNAL) || verbose >= 4) {
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/* Get the command name */
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if ((len = ENGINE_ctrl(e, ENGINE_CTRL_GET_NAME_LEN_FROM_CMD, num,
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NULL, NULL)) <= 0)
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goto err;
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name = app_malloc(len + 1, "name buffer");
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if (ENGINE_ctrl(e, ENGINE_CTRL_GET_NAME_FROM_CMD, num, name,
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NULL) <= 0)
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goto err;
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/* Get the command description */
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if ((len = ENGINE_ctrl(e, ENGINE_CTRL_GET_DESC_LEN_FROM_CMD, num,
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NULL, NULL)) < 0)
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goto err;
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if (len > 0) {
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desc = app_malloc(len + 1, "description buffer");
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if (ENGINE_ctrl(e, ENGINE_CTRL_GET_DESC_FROM_CMD, num, desc,
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NULL) <= 0)
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goto err;
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}
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/* Now decide on the output */
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if (xpos == 0)
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/* Do an indent */
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xpos = BIO_puts(out, indent);
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else
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/* Otherwise prepend a ", " */
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xpos += BIO_printf(out, ", ");
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if (verbose == 1) {
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/*
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* We're just listing names, comma-delimited
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*/
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if ((xpos > (int)strlen(indent)) &&
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(xpos + (int)strlen(name) > line_wrap)) {
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BIO_printf(out, "\n");
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xpos = BIO_puts(out, indent);
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}
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xpos += BIO_printf(out, "%s", name);
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} else {
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/* We're listing names plus descriptions */
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BIO_printf(out, "%s: %s\n", name,
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(desc == NULL) ? "<no description>" : desc);
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/* ... and sometimes input flags */
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if ((verbose >= 3) && !util_flags(out, flags, indent))
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goto err;
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xpos = 0;
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}
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}
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OPENSSL_free(name);
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name = NULL;
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OPENSSL_free(desc);
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desc = NULL;
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/* Move to the next command */
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num = ENGINE_ctrl(e, ENGINE_CTRL_GET_NEXT_CMD_TYPE, num, NULL, NULL);
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} while (num > 0);
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if (xpos > 0)
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BIO_printf(out, "\n");
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ret = 1;
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err:
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sk_OPENSSL_STRING_free(cmds);
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OPENSSL_free(name);
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OPENSSL_free(desc);
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return ret;
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}
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static void util_do_cmds(ENGINE *e, STACK_OF(OPENSSL_STRING) *cmds,
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BIO *out, const char *indent)
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{
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int loop, res, num = sk_OPENSSL_STRING_num(cmds);
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if (num < 0) {
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BIO_printf(out, "[Error]: internal stack error\n");
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return;
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}
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for (loop = 0; loop < num; loop++) {
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char buf[256];
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const char *cmd, *arg;
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cmd = sk_OPENSSL_STRING_value(cmds, loop);
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res = 1; /* assume success */
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/* Check if this command has no ":arg" */
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if ((arg = strstr(cmd, ":")) == NULL) {
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if (!ENGINE_ctrl_cmd_string(e, cmd, NULL, 0))
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res = 0;
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} else {
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if ((int)(arg - cmd) > 254) {
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BIO_printf(out, "[Error]: command name too long\n");
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return;
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}
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memcpy(buf, cmd, (int)(arg - cmd));
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buf[arg - cmd] = '\0';
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arg++; /* Move past the ":" */
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/* Call the command with the argument */
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if (!ENGINE_ctrl_cmd_string(e, buf, arg, 0))
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res = 0;
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}
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if (res) {
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BIO_printf(out, "[Success]: %s\n", cmd);
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} else {
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BIO_printf(out, "[Failure]: %s\n", cmd);
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ERR_print_errors(out);
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}
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}
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}
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struct util_store_cap_data {
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ENGINE *engine;
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char **cap_buf;
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int *cap_size;
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int ok;
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};
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static void util_store_cap(const OSSL_STORE_LOADER *loader, void *arg)
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{
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struct util_store_cap_data *ctx = arg;
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if (OSSL_STORE_LOADER_get0_engine(loader) == ctx->engine) {
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char buf[256];
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BIO_snprintf(buf, sizeof(buf), "STORE(%s)",
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OSSL_STORE_LOADER_get0_scheme(loader));
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if (!append_buf(ctx->cap_buf, ctx->cap_size, buf))
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ctx->ok = 0;
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}
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}
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int engine_main(int argc, char **argv)
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{
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int ret = 1, i;
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int verbose = 0, list_cap = 0, test_avail = 0, test_avail_noise = 0;
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ENGINE *e;
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STACK_OF(OPENSSL_CSTRING) *engines = sk_OPENSSL_CSTRING_new_null();
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STACK_OF(OPENSSL_STRING) *pre_cmds = sk_OPENSSL_STRING_new_null();
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STACK_OF(OPENSSL_STRING) *post_cmds = sk_OPENSSL_STRING_new_null();
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BIO *out;
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const char *indent = " ";
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OPTION_CHOICE o;
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char *prog;
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char *argv1;
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out = dup_bio_out(FORMAT_TEXT);
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if (engines == NULL || pre_cmds == NULL || post_cmds == NULL)
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goto end;
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/* Remember the original command name, parse/skip any leading engine
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* names, and then setup to parse the rest of the line as flags. */
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prog = argv[0];
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while ((argv1 = argv[1]) != NULL && *argv1 != '-') {
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sk_OPENSSL_CSTRING_push(engines, argv1);
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argc--;
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argv++;
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}
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argv[0] = prog;
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opt_init(argc, argv, engine_options);
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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opt_help(engine_options);
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ret = 0;
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goto end;
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case OPT_VVVV:
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case OPT_VVV:
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case OPT_VV:
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case OPT_V:
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/* Convert to an integer from one to four. */
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i = (int)(o - OPT_V) + 1;
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if (verbose < i)
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verbose = i;
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break;
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case OPT_C:
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list_cap = 1;
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break;
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case OPT_TT:
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test_avail_noise++;
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/* fall thru */
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case OPT_T:
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test_avail++;
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break;
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case OPT_PRE:
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sk_OPENSSL_STRING_push(pre_cmds, opt_arg());
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break;
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case OPT_POST:
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sk_OPENSSL_STRING_push(post_cmds, opt_arg());
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break;
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}
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}
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/* Allow any trailing parameters as engine names. */
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argc = opt_num_rest();
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argv = opt_rest();
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for ( ; *argv; argv++) {
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if (**argv == '-') {
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BIO_printf(bio_err, "%s: Cannot mix flags and engine names.\n",
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prog);
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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}
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sk_OPENSSL_CSTRING_push(engines, *argv);
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}
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if (sk_OPENSSL_CSTRING_num(engines) == 0) {
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for (e = ENGINE_get_first(); e != NULL; e = ENGINE_get_next(e)) {
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sk_OPENSSL_CSTRING_push(engines, ENGINE_get_id(e));
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}
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}
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ret = 0;
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for (i = 0; i < sk_OPENSSL_CSTRING_num(engines); i++) {
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const char *id = sk_OPENSSL_CSTRING_value(engines, i);
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if ((e = ENGINE_by_id(id)) != NULL) {
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const char *name = ENGINE_get_name(e);
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/*
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* Do "id" first, then "name". Easier to auto-parse.
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*/
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BIO_printf(out, "(%s) %s\n", id, name);
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util_do_cmds(e, pre_cmds, out, indent);
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if (strcmp(ENGINE_get_id(e), id) != 0) {
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BIO_printf(out, "Loaded: (%s) %s\n",
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ENGINE_get_id(e), ENGINE_get_name(e));
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}
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if (list_cap) {
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int cap_size = 256;
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char *cap_buf = NULL;
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int k, n;
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const int *nids;
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ENGINE_CIPHERS_PTR fn_c;
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ENGINE_DIGESTS_PTR fn_d;
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ENGINE_PKEY_METHS_PTR fn_pk;
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if (ENGINE_get_RSA(e) != NULL
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&& !append_buf(&cap_buf, &cap_size, "RSA"))
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goto end;
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if (ENGINE_get_DSA(e) != NULL
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&& !append_buf(&cap_buf, &cap_size, "DSA"))
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goto end;
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if (ENGINE_get_DH(e) != NULL
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&& !append_buf(&cap_buf, &cap_size, "DH"))
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goto end;
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if (ENGINE_get_RAND(e) != NULL
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&& !append_buf(&cap_buf, &cap_size, "RAND"))
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goto end;
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fn_c = ENGINE_get_ciphers(e);
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if (fn_c == NULL)
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goto skip_ciphers;
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n = fn_c(e, NULL, &nids, 0);
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for (k = 0; k < n; ++k)
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if (!append_buf(&cap_buf, &cap_size, OBJ_nid2sn(nids[k])))
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goto end;
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skip_ciphers:
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fn_d = ENGINE_get_digests(e);
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if (fn_d == NULL)
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goto skip_digests;
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n = fn_d(e, NULL, &nids, 0);
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for (k = 0; k < n; ++k)
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if (!append_buf(&cap_buf, &cap_size, OBJ_nid2sn(nids[k])))
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goto end;
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skip_digests:
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fn_pk = ENGINE_get_pkey_meths(e);
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if (fn_pk == NULL)
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goto skip_pmeths;
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n = fn_pk(e, NULL, &nids, 0);
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for (k = 0; k < n; ++k)
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if (!append_buf(&cap_buf, &cap_size, OBJ_nid2sn(nids[k])))
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goto end;
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skip_pmeths:
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{
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struct util_store_cap_data store_ctx;
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store_ctx.engine = e;
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store_ctx.cap_buf = &cap_buf;
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store_ctx.cap_size = &cap_size;
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store_ctx.ok = 1;
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OSSL_STORE_do_all_loaders(util_store_cap, &store_ctx);
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if (!store_ctx.ok)
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goto end;
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}
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if (cap_buf != NULL && (*cap_buf != '\0'))
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BIO_printf(out, " [%s]\n", cap_buf);
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OPENSSL_free(cap_buf);
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}
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if (test_avail) {
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BIO_printf(out, "%s", indent);
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if (ENGINE_init(e)) {
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BIO_printf(out, "[ available ]\n");
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util_do_cmds(e, post_cmds, out, indent);
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ENGINE_finish(e);
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} else {
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BIO_printf(out, "[ unavailable ]\n");
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if (test_avail_noise)
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ERR_print_errors_fp(stdout);
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ERR_clear_error();
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}
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}
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if ((verbose > 0) && !util_verbose(e, verbose, out, indent))
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goto end;
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ENGINE_free(e);
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} else {
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ERR_print_errors(bio_err);
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/* because exit codes above 127 have special meaning on Unix */
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if (++ret > 127)
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ret = 127;
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}
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}
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end:
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ERR_print_errors(bio_err);
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sk_OPENSSL_CSTRING_free(engines);
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sk_OPENSSL_STRING_free(pre_cmds);
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sk_OPENSSL_STRING_free(post_cmds);
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BIO_free_all(out);
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return ret;
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}
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