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608 lines
20 KiB
C
608 lines
20 KiB
C
/*
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* Copyright 2004-2020 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2004, EdelKey Project. 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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* Originally written by Christophe Renou and Peter Sylvester,
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* for the EdelKey project.
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*/
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#include <openssl/opensslconf.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/conf.h>
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/txt_db.h>
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#include <openssl/buffer.h>
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#include <openssl/srp.h>
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#include "apps.h"
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#include "progs.h"
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#define BASE_SECTION "srp"
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#define CONFIG_FILE "openssl.cnf"
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#define ENV_DATABASE "srpvfile"
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#define ENV_DEFAULT_SRP "default_srp"
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static int get_index(CA_DB *db, char *id, char type)
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{
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char **pp;
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int i;
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if (id == NULL)
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return -1;
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if (type == DB_SRP_INDEX) {
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for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
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pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
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if (pp[DB_srptype][0] == DB_SRP_INDEX
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&& strcmp(id, pp[DB_srpid]) == 0)
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return i;
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}
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} else {
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for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
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pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
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if (pp[DB_srptype][0] != DB_SRP_INDEX
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&& strcmp(id, pp[DB_srpid]) == 0)
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return i;
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}
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}
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return -1;
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}
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static void print_entry(CA_DB *db, int indx, int verbose, char *s)
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{
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if (indx >= 0 && verbose) {
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int j;
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char **pp = sk_OPENSSL_PSTRING_value(db->db->data, indx);
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BIO_printf(bio_err, "%s \"%s\"\n", s, pp[DB_srpid]);
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for (j = 0; j < DB_NUMBER; j++) {
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BIO_printf(bio_err, " %d = \"%s\"\n", j, pp[j]);
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}
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}
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}
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static void print_index(CA_DB *db, int indexindex, int verbose)
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{
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print_entry(db, indexindex, verbose, "g N entry");
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}
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static void print_user(CA_DB *db, int userindex, int verbose)
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{
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if (verbose > 0) {
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char **pp = sk_OPENSSL_PSTRING_value(db->db->data, userindex);
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if (pp[DB_srptype][0] != 'I') {
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print_entry(db, userindex, verbose, "User entry");
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print_entry(db, get_index(db, pp[DB_srpgN], 'I'), verbose,
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"g N entry");
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}
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}
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}
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static int update_index(CA_DB *db, char **row)
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{
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char **irow;
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int i;
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irow = app_malloc(sizeof(*irow) * (DB_NUMBER + 1), "row pointers");
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for (i = 0; i < DB_NUMBER; i++)
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irow[i] = row[i];
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irow[DB_NUMBER] = NULL;
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if (!TXT_DB_insert(db->db, irow)) {
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BIO_printf(bio_err, "failed to update srpvfile\n");
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BIO_printf(bio_err, "TXT_DB error number %ld\n", db->db->error);
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OPENSSL_free(irow);
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return 0;
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}
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return 1;
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}
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static char *lookup_conf(const CONF *conf, const char *section, const char *tag)
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{
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char *entry = NCONF_get_string(conf, section, tag);
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if (entry == NULL)
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BIO_printf(bio_err, "variable lookup failed for %s::%s\n", section, tag);
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return entry;
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}
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static char *srp_verify_user(const char *user, const char *srp_verifier,
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char *srp_usersalt, const char *g, const char *N,
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const char *passin, int verbose)
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{
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char password[1025];
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PW_CB_DATA cb_tmp;
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char *verifier = NULL;
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char *gNid = NULL;
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int len;
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cb_tmp.prompt_info = user;
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cb_tmp.password = passin;
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len = password_callback(password, sizeof(password)-1, 0, &cb_tmp);
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if (len > 0) {
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password[len] = 0;
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if (verbose)
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BIO_printf(bio_err,
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"Validating\n user=\"%s\"\n srp_verifier=\"%s\"\n srp_usersalt=\"%s\"\n g=\"%s\"\n N=\"%s\"\n",
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user, srp_verifier, srp_usersalt, g, N);
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if (verbose > 1)
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BIO_printf(bio_err, "Pass %s\n", password);
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OPENSSL_assert(srp_usersalt != NULL);
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if ((gNid = SRP_create_verifier(user, password, &srp_usersalt,
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&verifier, N, g)) == NULL) {
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BIO_printf(bio_err, "Internal error validating SRP verifier\n");
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} else {
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if (strcmp(verifier, srp_verifier))
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gNid = NULL;
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OPENSSL_free(verifier);
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}
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OPENSSL_cleanse(password, len);
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}
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return gNid;
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}
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static char *srp_create_user(char *user, char **srp_verifier,
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char **srp_usersalt, char *g, char *N,
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char *passout, int verbose)
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{
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char password[1025];
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PW_CB_DATA cb_tmp;
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char *gNid = NULL;
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char *salt = NULL;
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int len;
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cb_tmp.prompt_info = user;
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cb_tmp.password = passout;
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len = password_callback(password, sizeof(password)-1, 1, &cb_tmp);
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if (len > 0) {
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password[len] = 0;
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if (verbose)
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BIO_printf(bio_err, "Creating\n user=\"%s\"\n g=\"%s\"\n N=\"%s\"\n",
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user, g, N);
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if ((gNid = SRP_create_verifier(user, password, &salt,
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srp_verifier, N, g)) == NULL) {
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BIO_printf(bio_err, "Internal error creating SRP verifier\n");
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} else {
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*srp_usersalt = salt;
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}
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OPENSSL_cleanse(password, len);
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if (verbose > 1)
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BIO_printf(bio_err, "gNid=%s salt =\"%s\"\n verifier =\"%s\"\n",
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gNid, salt, *srp_verifier);
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}
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return gNid;
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}
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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_VERBOSE, OPT_CONFIG, OPT_NAME, OPT_SRPVFILE, OPT_ADD,
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OPT_DELETE, OPT_MODIFY, OPT_LIST, OPT_GN, OPT_USERINFO,
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OPT_PASSIN, OPT_PASSOUT, OPT_ENGINE, OPT_R_ENUM
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} OPTION_CHOICE;
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const OPTIONS srp_options[] = {
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{"help", OPT_HELP, '-', "Display this summary"},
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{"verbose", OPT_VERBOSE, '-', "Talk a lot while doing things"},
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{"config", OPT_CONFIG, '<', "A config file"},
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{"name", OPT_NAME, 's', "The particular srp definition to use"},
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{"srpvfile", OPT_SRPVFILE, '<', "The srp verifier file name"},
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{"add", OPT_ADD, '-', "Add a user and srp verifier"},
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{"modify", OPT_MODIFY, '-',
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"Modify the srp verifier of an existing user"},
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{"delete", OPT_DELETE, '-', "Delete user from verifier file"},
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{"list", OPT_LIST, '-', "List users"},
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{"gn", OPT_GN, 's', "Set g and N values to be used for new verifier"},
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{"userinfo", OPT_USERINFO, 's', "Additional info to be set for user"},
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{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
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{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
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OPT_R_OPTIONS,
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#ifndef OPENSSL_NO_ENGINE
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{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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#endif
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{NULL}
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};
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int srp_main(int argc, char **argv)
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{
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ENGINE *e = NULL;
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CA_DB *db = NULL;
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CONF *conf = NULL;
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int gNindex = -1, maxgN = -1, ret = 1, errors = 0, verbose = 0, i;
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int doupdatedb = 0, mode = OPT_ERR;
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char *user = NULL, *passinarg = NULL, *passoutarg = NULL;
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char *passin = NULL, *passout = NULL, *gN = NULL, *userinfo = NULL;
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char *section = NULL;
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char **gNrow = NULL, *configfile = NULL;
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char *srpvfile = NULL, **pp, *prog;
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OPTION_CHOICE o;
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prog = opt_init(argc, argv, srp_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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opthelp:
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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(srp_options);
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ret = 0;
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goto end;
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case OPT_VERBOSE:
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verbose++;
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break;
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case OPT_CONFIG:
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configfile = opt_arg();
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break;
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case OPT_NAME:
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section = opt_arg();
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break;
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case OPT_SRPVFILE:
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srpvfile = opt_arg();
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break;
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case OPT_ADD:
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case OPT_DELETE:
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case OPT_MODIFY:
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case OPT_LIST:
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if (mode != OPT_ERR) {
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BIO_printf(bio_err,
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"%s: Only one of -add/-delete/-modify/-list\n",
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prog);
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goto opthelp;
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}
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mode = o;
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break;
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case OPT_GN:
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gN = opt_arg();
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break;
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case OPT_USERINFO:
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userinfo = opt_arg();
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break;
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case OPT_PASSIN:
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passinarg = opt_arg();
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break;
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case OPT_PASSOUT:
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passoutarg = opt_arg();
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break;
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case OPT_ENGINE:
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e = setup_engine(opt_arg(), 0);
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break;
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case OPT_R_CASES:
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if (!opt_rand(o))
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goto end;
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break;
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}
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}
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argc = opt_num_rest();
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argv = opt_rest();
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if (srpvfile != NULL && configfile != NULL) {
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BIO_printf(bio_err,
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"-srpvfile and -configfile cannot be specified together.\n");
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goto end;
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}
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if (mode == OPT_ERR) {
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BIO_printf(bio_err,
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"Exactly one of the options -add, -delete, -modify -list must be specified.\n");
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goto opthelp;
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}
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if (mode == OPT_DELETE || mode == OPT_MODIFY || mode == OPT_ADD) {
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if (argc == 0) {
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BIO_printf(bio_err, "Need at least one user.\n");
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goto opthelp;
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}
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user = *argv++;
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}
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if ((passinarg != NULL || passoutarg != NULL) && argc != 1) {
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BIO_printf(bio_err,
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"-passin, -passout arguments only valid with one user.\n");
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goto opthelp;
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}
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if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
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BIO_printf(bio_err, "Error getting passwords\n");
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goto end;
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}
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if (srpvfile == NULL) {
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if (configfile == NULL)
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configfile = default_config_file;
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if (verbose)
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BIO_printf(bio_err, "Using configuration from %s\n",
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configfile);
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conf = app_load_config(configfile);
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if (conf == NULL)
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goto end;
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if (configfile != default_config_file && !app_load_modules(conf))
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goto end;
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/* Lets get the config section we are using */
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if (section == NULL) {
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if (verbose)
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BIO_printf(bio_err,
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"trying to read " ENV_DEFAULT_SRP
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" in " BASE_SECTION "\n");
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section = lookup_conf(conf, BASE_SECTION, ENV_DEFAULT_SRP);
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if (section == NULL)
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goto end;
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}
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app_RAND_load_conf(conf, BASE_SECTION);
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if (verbose)
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BIO_printf(bio_err,
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"trying to read " ENV_DATABASE " in section \"%s\"\n",
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section);
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srpvfile = lookup_conf(conf, section, ENV_DATABASE);
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if (srpvfile == NULL)
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goto end;
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}
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if (verbose)
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BIO_printf(bio_err, "Trying to read SRP verifier file \"%s\"\n",
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srpvfile);
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db = load_index(srpvfile, NULL);
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if (db == NULL)
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goto end;
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/* Lets check some fields */
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for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++) {
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pp = sk_OPENSSL_PSTRING_value(db->db->data, i);
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if (pp[DB_srptype][0] == DB_SRP_INDEX) {
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maxgN = i;
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if ((gNindex < 0) && (gN != NULL) && strcmp(gN, pp[DB_srpid]) == 0)
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gNindex = i;
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print_index(db, i, verbose > 1);
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}
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}
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if (verbose)
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BIO_printf(bio_err, "Database initialised\n");
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if (gNindex >= 0) {
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gNrow = sk_OPENSSL_PSTRING_value(db->db->data, gNindex);
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print_entry(db, gNindex, verbose > 1, "Default g and N");
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} else if (maxgN > 0 && !SRP_get_default_gN(gN)) {
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BIO_printf(bio_err, "No g and N value for index \"%s\"\n", gN);
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goto end;
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} else {
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if (verbose)
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BIO_printf(bio_err, "Database has no g N information.\n");
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gNrow = NULL;
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}
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if (verbose > 1)
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BIO_printf(bio_err, "Starting user processing\n");
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while (mode == OPT_LIST || user != NULL) {
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int userindex = -1;
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if (user != NULL && verbose > 1)
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BIO_printf(bio_err, "Processing user \"%s\"\n", user);
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if ((userindex = get_index(db, user, 'U')) >= 0)
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print_user(db, userindex, (verbose > 0) || mode == OPT_LIST);
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if (mode == OPT_LIST) {
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if (user == NULL) {
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BIO_printf(bio_err, "List all users\n");
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for (i = 0; i < sk_OPENSSL_PSTRING_num(db->db->data); i++)
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print_user(db, i, 1);
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} else if (userindex < 0) {
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BIO_printf(bio_err,
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"user \"%s\" does not exist, ignored. t\n", user);
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errors++;
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}
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} else if (mode == OPT_ADD) {
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if (userindex >= 0) {
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/* reactivation of a new user */
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char **row =
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sk_OPENSSL_PSTRING_value(db->db->data, userindex);
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BIO_printf(bio_err, "user \"%s\" reactivated.\n", user);
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row[DB_srptype][0] = 'V';
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doupdatedb = 1;
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} else {
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char *row[DB_NUMBER];
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char *gNid;
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row[DB_srpverifier] = NULL;
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row[DB_srpsalt] = NULL;
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row[DB_srpinfo] = NULL;
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if (!
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(gNid =
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srp_create_user(user, &(row[DB_srpverifier]),
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&(row[DB_srpsalt]),
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gNrow ? gNrow[DB_srpsalt] : gN,
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gNrow ? gNrow[DB_srpverifier] : NULL,
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passout, verbose))) {
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BIO_printf(bio_err,
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"Cannot create srp verifier for user \"%s\", operation abandoned .\n",
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user);
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errors++;
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goto end;
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}
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row[DB_srpid] = OPENSSL_strdup(user);
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row[DB_srptype] = OPENSSL_strdup("v");
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row[DB_srpgN] = OPENSSL_strdup(gNid);
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if ((row[DB_srpid] == NULL)
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|| (row[DB_srpgN] == NULL)
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|| (row[DB_srptype] == NULL)
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|| (row[DB_srpverifier] == NULL)
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|| (row[DB_srpsalt] == NULL)
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|| (userinfo
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&& ((row[DB_srpinfo] = OPENSSL_strdup(userinfo)) == NULL))
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|| !update_index(db, row)) {
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OPENSSL_free(row[DB_srpid]);
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OPENSSL_free(row[DB_srpgN]);
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OPENSSL_free(row[DB_srpinfo]);
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OPENSSL_free(row[DB_srptype]);
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OPENSSL_free(row[DB_srpverifier]);
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OPENSSL_free(row[DB_srpsalt]);
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goto end;
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}
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doupdatedb = 1;
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}
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} else if (mode == OPT_MODIFY) {
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if (userindex < 0) {
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BIO_printf(bio_err,
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"user \"%s\" does not exist, operation ignored.\n",
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user);
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errors++;
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} else {
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char **row =
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sk_OPENSSL_PSTRING_value(db->db->data, userindex);
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char type = row[DB_srptype][0];
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if (type == 'v') {
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BIO_printf(bio_err,
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"user \"%s\" already updated, operation ignored.\n",
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user);
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errors++;
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} else {
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char *gNid;
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if (row[DB_srptype][0] == 'V') {
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int user_gN;
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char **irow = NULL;
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if (verbose)
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BIO_printf(bio_err,
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"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] = OPENSSL_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] = OPENSSL_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;
|
|
}
|
|
}
|
|
user = *argv++;
|
|
if (user == NULL) {
|
|
/* no more processing in any mode if no users left */
|
|
break;
|
|
}
|
|
}
|
|
|
|
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(passin);
|
|
OPENSSL_free(passout);
|
|
if (ret)
|
|
ERR_print_errors(bio_err);
|
|
NCONF_free(conf);
|
|
free_index(db);
|
|
release_engine(e);
|
|
return ret;
|
|
}
|