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openssl/apps/srp.c
Matt Caswell dfd6211ce3 Fix -srpvfile option in srp command line 
The -srpvfile option was broken in the srp command line app. Using it would
always result in "-dbfile and -configfile cannot be specified together."
The error message is also wrong because the option is "-srpvfile" not
"-dbfile", so that has been fixed too.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
2015-09-21 10:17:58 +01:00

664 lines
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/*
* Written by Peter Sylvester (peter.sylvester@edelweb.fr) for the EdelKey
* project and contributed to the OpenSSL project 2004.
*/
/* ====================================================================
* Copyright (c) 2004 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_SRP
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/conf.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/txt_db.h>
#include <openssl/buffer.h>
#include <openssl/srp.h>
#include "apps.h"
# define BASE_SECTION "srp"
# define CONFIG_FILE "openssl.cnf"
# define ENV_RANDFILE "RANDFILE"
# define ENV_DATABASE "srpvfile"
# define ENV_DEFAULT_SRP "default_srp"
static int get_index(CA_DB *db, char *id, char type)
{
char **pp;
int i;
if (id == NULL)
return -1;
if (type == DB_SRP_INDEX)
for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
if (pp[DB_srptype][0] == DB_SRP_INDEX
&& strcmp(id, pp[DB_srpid]) == 0)
return i;
} else
for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
if (pp[DB_srptype][0] != DB_SRP_INDEX
&& strcmp(id, pp[DB_srpid]) == 0)
return i;
}
return -1;
}
static void print_entry(CA_DB *db, int indx, int verbose, char *s)
{
if (indx >= 0 && verbose) {
int j;
char **pp = sk_OPENSSL_PSTRING_value(db->db->data, indx);
BIO_printf(bio_err, "%s \"%s\"\n", s, pp[DB_srpid]);
for (j = 0; j < DB_NUMBER; j++) {
BIO_printf(bio_err, " %d = \"%s\"\n", j, pp[j]);
}
}
}
static void print_index(CA_DB *db, int indexindex, int verbose)
{
print_entry(db, indexindex, verbose, "g N entry");
}
static void print_user(CA_DB *db, int userindex, int verbose)
{
if (verbose > 0) {
char **pp = sk_OPENSSL_PSTRING_value(db->db->data, userindex);
if (pp[DB_srptype][0] != 'I') {
print_entry(db, userindex, verbose, "User entry");
print_entry(db, get_index(db, pp[DB_srpgN], 'I'), verbose,
"g N entry");
}
}
}
static int update_index(CA_DB *db, char **row)
{
char **irow;
int i;
irow = app_malloc(sizeof(*irow) * (DB_NUMBER + 1), "row pointers");
for (i = 0; i < DB_NUMBER; i++) {
irow[i] = row[i];
row[i] = NULL;
}
irow[DB_NUMBER] = NULL;
if (!TXT_DB_insert(db->db, irow)) {
BIO_printf(bio_err, "failed to update srpvfile\n");
BIO_printf(bio_err, "TXT_DB error number %ld\n", db->db->error);
OPENSSL_free(irow);
return 0;
}
return 1;
}
static void lookup_fail(const char *name, const char *tag)
{
BIO_printf(bio_err, "variable lookup failed for %s::%s\n", name, tag);
}
static char *srp_verify_user(const char *user, const char *srp_verifier,
char *srp_usersalt, const char *g, const char *N,
const char *passin, int verbose)
{
char password[1024];
PW_CB_DATA cb_tmp;
char *verifier = NULL;
char *gNid = NULL;
cb_tmp.prompt_info = user;
cb_tmp.password = passin;
if (password_callback(password, 1024, 0, &cb_tmp) > 0) {
if (verbose)
BIO_printf(bio_err,
"Validating\n user=\"%s\"\n srp_verifier=\"%s\"\n srp_usersalt=\"%s\"\n g=\"%s\"\n N=\"%s\"\n",
user, srp_verifier, srp_usersalt, g, N);
BIO_printf(bio_err, "Pass %s\n", password);
OPENSSL_assert(srp_usersalt != NULL);
if (!
(gNid =
SRP_create_verifier(user, password, &srp_usersalt, &verifier, N,
g))) {
BIO_printf(bio_err, "Internal error validating SRP verifier\n");
} else {
if (strcmp(verifier, srp_verifier))
gNid = NULL;
OPENSSL_free(verifier);
}
}
return gNid;
}
static char *srp_create_user(char *user, char **srp_verifier,
char **srp_usersalt, char *g, char *N,
char *passout, int verbose)
{
char password[1024];
PW_CB_DATA cb_tmp;
char *gNid = NULL;
char *salt = NULL;
cb_tmp.prompt_info = user;
cb_tmp.password = passout;
if (password_callback(password, 1024, 1, &cb_tmp) > 0) {
if (verbose)
BIO_printf(bio_err, "Creating\n user=\"%s\"\n g=\"%s\"\n N=\"%s\"\n",
user, g, N);
if (!
(gNid =
SRP_create_verifier(user, password, &salt, srp_verifier, N,
g))) {
BIO_printf(bio_err, "Internal error creating SRP verifier\n");
} else
*srp_usersalt = salt;
if (verbose > 1)
BIO_printf(bio_err, "gNid=%s salt =\"%s\"\n verifier =\"%s\"\n", gNid,
salt, *srp_verifier);
}
return gNid;
}
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_VERBOSE, OPT_CONFIG, OPT_NAME, OPT_SRPVFILE, OPT_ADD,
OPT_DELETE, OPT_MODIFY, OPT_LIST, OPT_GN, OPT_USERINFO,
OPT_PASSIN, OPT_PASSOUT, OPT_ENGINE
} OPTION_CHOICE;
OPTIONS srp_options[] = {
{"help", OPT_HELP, '-', "Display this summary"},
{"verbose", OPT_VERBOSE, '-', "Talk a lot while doing things"},
{"config", OPT_CONFIG, '<', "A config file"},
{"name", OPT_NAME, 's', "The particular srp definition to use"},
{"srpvfile", OPT_SRPVFILE, '<', "The srp verifier file name"},
{"add", OPT_ADD, '-', "Add a user and srp verifier"},
{"modify", OPT_MODIFY, '-',
"Modify the srp verifier of an existing user"},
{"delete", OPT_DELETE, '-', "Delete user from verifier file"},
{"list", OPT_LIST, '-', "List users"},
{"gn", OPT_GN, 's', "Set g and N values to be used for new verifier"},
{"userinfo", OPT_USERINFO, 's', "Additional info to be set for user"},
{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
# ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
# endif
{NULL}
};
int srp_main(int argc, char **argv)
{
CA_DB *db = NULL;
DB_ATTR db_attr;
CONF *conf = NULL;
int gNindex = -1, maxgN = -1, ret = 1, errors = 0, verbose = 0, i;
int doupdatedb = 0, mode = OPT_ERR;
char *user = NULL, *passinarg = NULL, *passoutarg = NULL;
char *passin = NULL, *passout = NULL, *gN = NULL, *userinfo = NULL;
char *randfile = NULL, *tofree = NULL, *section = NULL;
char **gNrow = NULL, *configfile = NULL;
char *srpvfile = NULL, **pp, *prog;
OPTION_CHOICE o;
prog = opt_init(argc, argv, srp_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
opthelp:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto end;
case OPT_HELP:
opt_help(srp_options);
ret = 0;
goto end;
case OPT_VERBOSE:
verbose++;
break;
case OPT_CONFIG:
configfile = opt_arg();
break;
case OPT_NAME:
section = opt_arg();
break;
case OPT_SRPVFILE:
srpvfile = opt_arg();
break;
case OPT_ADD:
case OPT_DELETE:
case OPT_MODIFY:
case OPT_LIST:
if (mode != OPT_ERR) {
BIO_printf(bio_err,
"%s: Only one of -add/delete-modify/-list\n",
prog);
goto opthelp;
}
mode = o;
break;
case OPT_GN:
gN = opt_arg();
break;
case OPT_USERINFO:
userinfo = opt_arg();
break;
case OPT_PASSIN:
passinarg = opt_arg();
break;
case OPT_PASSOUT:
passoutarg = opt_arg();
break;
case OPT_ENGINE:
(void)setup_engine(opt_arg(), 0);
break;
}
}
argc = opt_num_rest();
argv = opt_rest();
if (srpvfile && configfile) {
BIO_printf(bio_err,
"-srpvfile and -configfile cannot be specified together.\n");
goto end;
}
if (mode == OPT_ERR) {
BIO_printf(bio_err,
"Exactly one of the options -add, -delete, -modify -list must be specified.\n");
goto opthelp;
}
if ((mode == OPT_DELETE || mode == OPT_MODIFY || mode == OPT_ADD)
&& argc < 1) {
BIO_printf(bio_err,
"Need at least one user for options -add, -delete, -modify. \n");
goto opthelp;
}
if ((passin || passout) && argc != 1) {
BIO_printf(bio_err,
"-passin, -passout arguments only valid with one user.\n");
goto opthelp;
}
if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
if (!srpvfile) {
if (!configfile)
configfile = default_config_file;
if (verbose)
BIO_printf(bio_err, "Using configuration from %s\n",
configfile);
conf = app_load_config(configfile);
if (conf == NULL)
goto end;
if (!app_load_modules(conf))
goto end;
/* Lets get the config section we are using */
if (section == NULL) {
if (verbose)
BIO_printf(bio_err,
"trying to read " ENV_DEFAULT_SRP
" in \" BASE_SECTION \"\n");
section = NCONF_get_string(conf, BASE_SECTION, ENV_DEFAULT_SRP);
if (section == NULL) {
lookup_fail(BASE_SECTION, ENV_DEFAULT_SRP);
goto end;
}
}
if (randfile == NULL && conf)
randfile = NCONF_get_string(conf, BASE_SECTION, "RANDFILE");
if (verbose)
BIO_printf(bio_err,
"trying to read " ENV_DATABASE " in section \"%s\"\n",
section);
if ((srpvfile = NCONF_get_string(conf, section, ENV_DATABASE))
== NULL) {
lookup_fail(section, ENV_DATABASE);
goto end;
}
}
if (randfile == NULL)
ERR_clear_error();
else
app_RAND_load_file(randfile, 0);
if (verbose)
BIO_printf(bio_err, "Trying to read SRP verifier file \"%s\"\n",
srpvfile);
db = load_index(srpvfile, &db_attr);
if (db == NULL)
goto end;
/* Lets check some fields */
for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
if (pp[DB_srptype][0] == DB_SRP_INDEX) {
maxgN = i;
if ((gNindex < 0) && (gN != NULL) && strcmp(gN, pp[DB_srpid]) == 0)
gNindex = i;
print_index(db, i, verbose > 1);
}
}
if (verbose)
BIO_printf(bio_err, "Database initialised\n");
if (gNindex >= 0) {
gNrow = sk_OPENSSL_PSTRING_value(db->db->data, gNindex);
print_entry(db, gNindex, verbose > 1, "Default g and N");
} else if (maxgN > 0 && !SRP_get_default_gN(gN)) {
BIO_printf(bio_err, "No g and N value for index \"%s\"\n", gN);
goto end;
} else {
if (verbose)
BIO_printf(bio_err, "Database has no g N information.\n");
gNrow = NULL;
}
if (verbose > 1)
BIO_printf(bio_err, "Starting user processing\n");
if (argc > 0)
user = *(argv++);
while (mode == OPT_LIST || user) {
int userindex = -1;
if (user)
if (verbose > 1)
BIO_printf(bio_err, "Processing user \"%s\"\n", user);
if ((userindex = get_index(db, user, 'U')) >= 0) {
print_user(db, userindex, (verbose > 0)
|| mode == OPT_LIST);
}
if (mode == OPT_LIST) {
if (user == NULL) {
BIO_printf(bio_err, "List all users\n");
for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
print_user(db, i, 1);
}
} else if (userindex < 0) {
BIO_printf(bio_err,
"user \"%s\" does not exist, ignored. t\n", user);
errors++;
}
} else if (mode == OPT_ADD) {
if (userindex >= 0) {
/* reactivation of a new user */
char **row =
sk_OPENSSL_PSTRING_value(db->db->data, userindex);
BIO_printf(bio_err, "user \"%s\" reactivated.\n", user);
row[DB_srptype][0] = 'V';
doupdatedb = 1;
} else {
char *row[DB_NUMBER];
char *gNid;
row[DB_srpverifier] = NULL;
row[DB_srpsalt] = NULL;
row[DB_srpinfo] = NULL;
if (!
(gNid =
srp_create_user(user, &(row[DB_srpverifier]),
&(row[DB_srpsalt]),
gNrow ? gNrow[DB_srpsalt] : gN,
gNrow ? gNrow[DB_srpverifier] : NULL,
passout, verbose))) {
BIO_printf(bio_err,
"Cannot create srp verifier for user \"%s\", operation abandoned .\n",
user);
errors++;
goto end;
}
row[DB_srpid] = BUF_strdup(user);
row[DB_srptype] = BUF_strdup("v");
row[DB_srpgN] = BUF_strdup(gNid);
if ((row[DB_srpid] == NULL)
|| (row[DB_srpgN] == NULL)
|| (row[DB_srptype] == NULL)
|| (row[DB_srpverifier] == NULL)
|| (row[DB_srpsalt] == NULL)
|| (userinfo
&& ((row[DB_srpinfo] = BUF_strdup(userinfo)) == NULL))
|| !update_index(db, row)) {
OPENSSL_free(row[DB_srpid]);
OPENSSL_free(row[DB_srpgN]);
OPENSSL_free(row[DB_srpinfo]);
OPENSSL_free(row[DB_srptype]);
OPENSSL_free(row[DB_srpverifier]);
OPENSSL_free(row[DB_srpsalt]);
goto end;
}
doupdatedb = 1;
}
} else if (mode == OPT_MODIFY) {
if (userindex < 0) {
BIO_printf(bio_err,
"user \"%s\" does not exist, operation ignored.\n",
user);
errors++;
} else {
char **row =
sk_OPENSSL_PSTRING_value(db->db->data, userindex);
char type = row[DB_srptype][0];
if (type == 'v') {
BIO_printf(bio_err,
"user \"%s\" already updated, operation ignored.\n",
user);
errors++;
} else {
char *gNid;
if (row[DB_srptype][0] == 'V') {
int user_gN;
char **irow = NULL;
if (verbose)
BIO_printf(bio_err,
"Verifying password for user \"%s\"\n",
user);
if ((user_gN =
get_index(db, row[DB_srpgN], DB_SRP_INDEX)) >= 0)
irow =
sk_OPENSSL_PSTRING_value(db->db->data,
userindex);
if (!srp_verify_user
(user, row[DB_srpverifier], row[DB_srpsalt],
irow ? irow[DB_srpsalt] : row[DB_srpgN],
irow ? irow[DB_srpverifier] : NULL, passin,
verbose)) {
BIO_printf(bio_err,
"Invalid password for user \"%s\", operation abandoned.\n",
user);
errors++;
goto end;
}
}
if (verbose)
BIO_printf(bio_err, "Password for user \"%s\" ok.\n",
user);
if (!
(gNid =
srp_create_user(user, &(row[DB_srpverifier]),
&(row[DB_srpsalt]),
gNrow ? gNrow[DB_srpsalt] : NULL,
gNrow ? gNrow[DB_srpverifier] : NULL,
passout, verbose))) {
BIO_printf(bio_err,
"Cannot create srp verifier for user \"%s\", operation abandoned.\n",
user);
errors++;
goto end;
}
row[DB_srptype][0] = 'v';
row[DB_srpgN] = BUF_strdup(gNid);
if (row[DB_srpid] == NULL
|| row[DB_srpgN] == NULL
|| row[DB_srptype] == NULL
|| row[DB_srpverifier] == NULL
|| row[DB_srpsalt] == NULL
|| (userinfo
&& ((row[DB_srpinfo] = BUF_strdup(userinfo))
== NULL)))
goto end;
doupdatedb = 1;
}
}
} else if (mode == OPT_DELETE) {
if (userindex < 0) {
BIO_printf(bio_err,
"user \"%s\" does not exist, operation ignored. t\n",
user);
errors++;
} else {
char **xpp = sk_OPENSSL_PSTRING_value(db->db->data, userindex);
BIO_printf(bio_err, "user \"%s\" revoked. t\n", user);
xpp[DB_srptype][0] = 'R';
doupdatedb = 1;
}
}
if (--argc > 0)
user = *(argv++);
else {
user = NULL;
}
}
if (verbose)
BIO_printf(bio_err, "User procession done.\n");
if (doupdatedb) {
/* Lets check some fields */
for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
if (pp[DB_srptype][0] == 'v') {
pp[DB_srptype][0] = 'V';
print_user(db, i, verbose);
}
}
if (verbose)
BIO_printf(bio_err, "Trying to update srpvfile.\n");
if (!save_index(srpvfile, "new", db))
goto end;
if (verbose)
BIO_printf(bio_err, "Temporary srpvfile created.\n");
if (!rotate_index(srpvfile, "new", "old"))
goto end;
if (verbose)
BIO_printf(bio_err, "srpvfile updated.\n");
}
ret = (errors != 0);
end:
if (errors != 0)
if (verbose)
BIO_printf(bio_err, "User errors %d.\n", errors);
if (verbose)
BIO_printf(bio_err, "SRP terminating with code %d.\n", ret);
OPENSSL_free(tofree);
if (ret)
ERR_print_errors(bio_err);
if (randfile)
app_RAND_write_file(randfile);
NCONF_free(conf);
free_index(db);
OBJ_cleanup();
return (ret);
}
#else
# if PEDANTIC
static void *dummy = &dummy;
# endif
#endif
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