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openssl/apps/srp.c
Ben Laurie 71fa451343 Version skew reduction: trivia (I hope).
2012-06-03 22:00:21 +00:00

758 lines
20 KiB
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/* apps/srp.c */
/* 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"
#undef PROG
#define PROG srp_main
#define BASE_SECTION "srp"
#define CONFIG_FILE "openssl.cnf"
#define ENV_RANDFILE "RANDFILE"
#define ENV_DATABASE "srpvfile"
#define ENV_DEFAULT_SRP "default_srp"
static char *srp_usage[]={
"usage: srp [args] [user] \n",
"\n",
" -verbose Talk alot while doing things\n",
" -config file A config file\n",
" -name arg The particular srp definition to use\n",
" -srpvfile arg The srp verifier file name\n",
" -add add an user and srp verifier\n",
" -modify modify the srp verifier of an existing user\n",
" -delete delete user from verifier file\n",
" -list list user\n",
" -gn arg g and N values to be used for new verifier\n",
" -userinfo arg additional info to be set for user\n",
" -passin arg input file pass phrase source\n",
" -passout arg output file pass phrase source\n",
#ifndef OPENSSL_NO_ENGINE
" -engine e - use engine e, possibly a hardware device.\n",
#endif
NULL
};
#ifdef EFENCE
extern int EF_PROTECT_FREE;
extern int EF_PROTECT_BELOW;
extern int EF_ALIGNMENT;
#endif
static CONF *conf=NULL;
static char *section=NULL;
#define VERBOSE if (verbose)
#define VVERBOSE if (verbose>1)
int MAIN(int, char **);
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]))
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]))
return i;
}
return -1 ;
}
static void print_entry(CA_DB *db, BIO *bio, 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, "%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, BIO *bio, int indexindex, int verbose)
{
print_entry(db, bio, indexindex, verbose, "g N entry") ;
}
static void print_user(CA_DB *db, BIO *bio, 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, bio, userindex, verbose, "User entry");
print_entry(db, bio, get_index(db, pp[DB_srpgN], 'I'), verbose, "g N entry");
}
}
}
static int update_index(CA_DB *db, BIO *bio, char **row)
{
char ** irow;
int i;
if ((irow=(char **)OPENSSL_malloc(sizeof(char *)*(DB_NUMBER+1))) == NULL)
{
BIO_printf(bio_err,"Memory allocation failure\n");
return 0;
}
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,"failed to update srpvfile\n");
BIO_printf(bio,"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, BIO *bio, 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)
{
VERBOSE BIO_printf(bio,"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, "Pass %s\n", password);
OPENSSL_assert(srp_usersalt != NULL);
if (!(gNid=SRP_create_verifier(user, password, &srp_usersalt, &verifier,
N, g)))
{
BIO_printf(bio, "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, BIO *bio, 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)
{
VERBOSE BIO_printf(bio,"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,"Internal error creating SRP verifier\n");
}
else
*srp_usersalt = salt;
VVERBOSE BIO_printf(bio,"gNid=%s salt =\"%s\"\n verifier =\"%s\"\n", gNid,salt, *srp_verifier);
}
return gNid;
}
int MAIN(int argc, char **argv)
{
int add_user = 0;
int list_user= 0;
int delete_user= 0;
int modify_user= 0;
char * user = NULL;
char *passargin = NULL, *passargout = NULL;
char *passin = NULL, *passout = NULL;
char * gN = NULL;
int gNindex = -1;
char ** gNrow = NULL;
int maxgN = -1;
char * userinfo = NULL;
int badops=0;
int ret=1;
int errors=0;
int verbose=0;
int doupdatedb=0;
char *configfile=NULL;
char *dbfile=NULL;
CA_DB *db=NULL;
char **pp ;
int i;
long errorline = -1;
char *randfile=NULL;
#ifndef OPENSSL_NO_ENGINE
char *engine = NULL;
#endif
char *tofree=NULL;
DB_ATTR db_attr;
#ifdef EFENCE
EF_PROTECT_FREE=1;
EF_PROTECT_BELOW=1;
EF_ALIGNMENT=0;
#endif
apps_startup();
conf = NULL;
section = NULL;
if (bio_err == NULL)
if ((bio_err=BIO_new(BIO_s_file())) != NULL)
BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
argc--;
argv++;
while (argc >= 1 && badops == 0)
{
if (strcmp(*argv,"-verbose") == 0)
verbose++;
else if (strcmp(*argv,"-config") == 0)
{
if (--argc < 1) goto bad;
configfile= *(++argv);
}
else if (strcmp(*argv,"-name") == 0)
{
if (--argc < 1) goto bad;
section= *(++argv);
}
else if (strcmp(*argv,"-srpvfile") == 0)
{
if (--argc < 1) goto bad;
dbfile= *(++argv);
}
else if (strcmp(*argv,"-add") == 0)
add_user=1;
else if (strcmp(*argv,"-delete") == 0)
delete_user=1;
else if (strcmp(*argv,"-modify") == 0)
modify_user=1;
else if (strcmp(*argv,"-list") == 0)
list_user=1;
else if (strcmp(*argv,"-gn") == 0)
{
if (--argc < 1) goto bad;
gN= *(++argv);
}
else if (strcmp(*argv,"-userinfo") == 0)
{
if (--argc < 1) goto bad;
userinfo= *(++argv);
}
else if (strcmp(*argv,"-passin") == 0)
{
if (--argc < 1) goto bad;
passargin= *(++argv);
}
else if (strcmp(*argv,"-passout") == 0)
{
if (--argc < 1) goto bad;
passargout= *(++argv);
}
#ifndef OPENSSL_NO_ENGINE
else if (strcmp(*argv,"-engine") == 0)
{
if (--argc < 1) goto bad;
engine= *(++argv);
}
#endif
else if (**argv == '-')
{
bad:
BIO_printf(bio_err,"unknown option %s\n",*argv);
badops=1;
break;
}
else
break;
argc--;
argv++;
}
if (dbfile && configfile)
{
BIO_printf(bio_err,"-dbfile and -configfile cannot be specified together.\n");
badops = 1;
}
if (add_user+delete_user+modify_user+list_user != 1)
{
BIO_printf(bio_err,"Exactly one of the options -add, -delete, -modify -list must be specified.\n");
badops = 1;
}
if (delete_user+modify_user+delete_user== 1 && argc <= 0)
{
BIO_printf(bio_err,"Need at least one user for options -add, -delete, -modify. \n");
badops = 1;
}
if ((passin || passout) && argc != 1 )
{
BIO_printf(bio_err,"-passin, -passout arguments only valid with one user.\n");
badops = 1;
}
if (badops)
{
for (pp=srp_usage; (*pp != NULL); pp++)
BIO_printf(bio_err,"%s",*pp);
BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
BIO_printf(bio_err," load the file (or the files in the directory) into\n");
BIO_printf(bio_err," the random number generator\n");
goto err;
}
ERR_load_crypto_strings();
#ifndef OPENSSL_NO_ENGINE
setup_engine(bio_err, engine, 0);
#endif
if(!app_passwd(bio_err, passargin, passargout, &passin, &passout))
{
BIO_printf(bio_err, "Error getting passwords\n");
goto err;
}
if (!dbfile)
{
/*****************************************************************/
tofree=NULL;
if (configfile == NULL) configfile = getenv("OPENSSL_CONF");
if (configfile == NULL) configfile = getenv("SSLEAY_CONF");
if (configfile == NULL)
{
const char *s=X509_get_default_cert_area();
size_t len;
#ifdef OPENSSL_SYS_VMS
len = strlen(s)+sizeof(CONFIG_FILE);
tofree=OPENSSL_malloc(len);
strcpy(tofree,s);
#else
len = strlen(s)+sizeof(CONFIG_FILE)+1;
tofree=OPENSSL_malloc(len);
BUF_strlcpy(tofree,s,len);
BUF_strlcat(tofree,"/",len);
#endif
BUF_strlcat(tofree,CONFIG_FILE,len);
configfile=tofree;
}
VERBOSE BIO_printf(bio_err,"Using configuration from %s\n",configfile);
conf = NCONF_new(NULL);
if (NCONF_load(conf,configfile,&errorline) <= 0)
{
if (errorline <= 0)
BIO_printf(bio_err,"error loading the config file '%s'\n",
configfile);
else
BIO_printf(bio_err,"error on line %ld of config file '%s'\n"
,errorline,configfile);
goto err;
}
if(tofree)
{
OPENSSL_free(tofree);
tofree = NULL;
}
if (!load_config(bio_err, conf))
goto err;
/* Lets get the config section we are using */
if (section == NULL)
{
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 err;
}
}
if (randfile == NULL && conf)
randfile = NCONF_get_string(conf, BASE_SECTION, "RANDFILE");
VERBOSE BIO_printf(bio_err,"trying to read " ENV_DATABASE " in section \"%s\"\n",section);
if ((dbfile=NCONF_get_string(conf,section,ENV_DATABASE)) == NULL)
{
lookup_fail(section,ENV_DATABASE);
goto err;
}
}
if (randfile == NULL)
ERR_clear_error();
else
app_RAND_load_file(randfile, bio_err, 0);
VERBOSE BIO_printf(bio_err,"Trying to read SRP verifier file \"%s\"\n",dbfile);
db = load_index(dbfile, &db_attr);
if (db == NULL) goto err;
/* 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]))
gNindex = i;
print_index(db, bio_err, i, verbose > 1);
}
}
VERBOSE BIO_printf(bio_err, "Database initialised\n");
if (gNindex >= 0)
{
gNrow = sk_OPENSSL_PSTRING_value(db->db->data,gNindex);
print_entry(db, bio_err, 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 err;
}
else
{
VERBOSE BIO_printf(bio_err, "Database has no g N information.\n");
gNrow = NULL;
}
VVERBOSE BIO_printf(bio_err,"Starting user processing\n");
if (argc > 0)
user = *(argv++) ;
while (list_user || user)
{
int userindex = -1;
if (user)
VVERBOSE BIO_printf(bio_err, "Processing user \"%s\"\n", user);
if ((userindex = get_index(db, user, 'U')) >= 0)
{
print_user(db, bio_err, userindex, (verbose > 0) || list_user);
}
if (list_user)
{
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,bio_err, i, 1);
}
list_user = 0;
}
else if (userindex < 0)
{
BIO_printf(bio_err, "user \"%s\" does not exist, ignored. t\n",
user);
errors++;
}
}
else if (add_user)
{
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, bio_err,verbose)))
{
BIO_printf(bio_err, "Cannot create srp verifier for user \"%s\", operation abandoned .\n", user);
errors++;
goto err;
}
row[DB_srpid] = BUF_strdup(user);
row[DB_srptype] = BUF_strdup("v");
row[DB_srpgN] = BUF_strdup(gNid);
if (!row[DB_srpid] || !row[DB_srpgN] || !row[DB_srptype] || !row[DB_srpverifier] || !row[DB_srpsalt] ||
(userinfo && (!(row[DB_srpinfo] = BUF_strdup(userinfo)))) ||
!update_index(db, bio_err, row))
{
if (row[DB_srpid]) OPENSSL_free(row[DB_srpid]);
if (row[DB_srpgN]) OPENSSL_free(row[DB_srpgN]);
if (row[DB_srpinfo]) OPENSSL_free(row[DB_srpinfo]);
if (row[DB_srptype]) OPENSSL_free(row[DB_srptype]);
if (row[DB_srpverifier]) OPENSSL_free(row[DB_srpverifier]);
if (row[DB_srpsalt]) OPENSSL_free(row[DB_srpsalt]);
goto err;
}
doupdatedb = 1;
}
}
else if (modify_user)
{
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;
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, bio_err, verbose))
{
BIO_printf(bio_err, "Invalid password for user \"%s\", operation abandoned.\n", user);
errors++;
goto err;
}
}
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, bio_err,verbose)))
{
BIO_printf(bio_err, "Cannot create srp verifier for user \"%s\", operation abandoned.\n", user);
errors++;
goto err;
}
row[DB_srptype][0] = 'v';
row[DB_srpgN] = BUF_strdup(gNid);
if (!row[DB_srpid] || !row[DB_srpgN] || !row[DB_srptype] || !row[DB_srpverifier] || !row[DB_srpsalt] ||
(userinfo && (!(row[DB_srpinfo] = BUF_strdup(userinfo)))))
goto err;
doupdatedb = 1;
}
}
}
else if (delete_user)
{
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;
list_user = 0;
}
}
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, bio_err, i, verbose);
}
}
VERBOSE BIO_printf(bio_err, "Trying to update srpvfile.\n");
if (!save_index(dbfile, "new", db)) goto err;
VERBOSE BIO_printf(bio_err, "Temporary srpvfile created.\n");
if (!rotate_index(dbfile, "new", "old")) goto err;
VERBOSE BIO_printf(bio_err, "srpvfile updated.\n");
}
ret = (errors != 0);
err:
if (errors != 0)
VERBOSE BIO_printf(bio_err,"User errors %d.\n",errors);
VERBOSE BIO_printf(bio_err,"SRP terminating with code %d.\n",ret);
if(tofree)
OPENSSL_free(tofree);
if (ret) ERR_print_errors(bio_err);
if (randfile) app_RAND_write_file(randfile, bio_err);
if (conf) NCONF_free(conf);
if (db) free_index(db);
OBJ_cleanup();
apps_shutdown();
OPENSSL_EXIT(ret);
}
#endif
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