| /* |
| * Copyright 2004-2020 The OpenSSL Project Authors. All Rights Reserved. |
| * Copyright (c) 2004, EdelKey Project. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| * |
| * Originally written by Christophe Renou and Peter Sylvester, |
| * for the EdelKey project. |
| */ |
| |
| #include <openssl/opensslconf.h> |
| #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" |
| #include "progs.h" |
| |
| #define BASE_SECTION "srp" |
| #define CONFIG_FILE "openssl.cnf" |
| |
| |
| #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]; |
| 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 char *lookup_conf(const CONF *conf, const char *section, const char *tag) |
| { |
| char *entry = NCONF_get_string(conf, section, tag); |
| if (entry == NULL) |
| BIO_printf(bio_err, "variable lookup failed for %s::%s\n", section, tag); |
| return entry; |
| } |
| |
| 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[1025]; |
| PW_CB_DATA cb_tmp; |
| char *verifier = NULL; |
| char *gNid = NULL; |
| int len; |
| |
| cb_tmp.prompt_info = user; |
| cb_tmp.password = passin; |
| |
| len = password_callback(password, sizeof(password)-1, 0, &cb_tmp); |
| if (len > 0) { |
| password[len] = 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); |
| if (verbose > 1) |
| 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)) == NULL) { |
| BIO_printf(bio_err, "Internal error validating SRP verifier\n"); |
| } else { |
| if (strcmp(verifier, srp_verifier)) |
| gNid = NULL; |
| OPENSSL_free(verifier); |
| } |
| OPENSSL_cleanse(password, len); |
| } |
| 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[1025]; |
| PW_CB_DATA cb_tmp; |
| char *gNid = NULL; |
| char *salt = NULL; |
| int len; |
| cb_tmp.prompt_info = user; |
| cb_tmp.password = passout; |
| |
| len = password_callback(password, sizeof(password)-1, 1, &cb_tmp); |
| if (len > 0) { |
| password[len] = 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)) == NULL) { |
| BIO_printf(bio_err, "Internal error creating SRP verifier\n"); |
| } else { |
| *srp_usersalt = salt; |
| } |
| OPENSSL_cleanse(password, len); |
| 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, OPT_R_ENUM |
| } OPTION_CHOICE; |
| |
| const 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"}, |
| OPT_R_OPTIONS, |
| #ifndef OPENSSL_NO_ENGINE |
| {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, |
| #endif |
| {NULL} |
| }; |
| |
| int srp_main(int argc, char **argv) |
| { |
| ENGINE *e = NULL; |
| CA_DB *db = NULL; |
| 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 *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: |
| e = setup_engine(opt_arg(), 0); |
| break; |
| case OPT_R_CASES: |
| if (!opt_rand(o)) |
| goto end; |
| break; |
| } |
| } |
| argc = opt_num_rest(); |
| argv = opt_rest(); |
| |
| if (srpvfile != NULL && configfile != NULL) { |
| 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) { |
| if (argc == 0) { |
| BIO_printf(bio_err, "Need at least one user.\n"); |
| goto opthelp; |
| } |
| user = *argv++; |
| } |
| if ((passinarg != NULL || passoutarg != NULL) && 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 == NULL) { |
| if (configfile == NULL) |
| 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 (configfile != default_config_file && !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 = lookup_conf(conf, BASE_SECTION, ENV_DEFAULT_SRP); |
| if (section == NULL) |
| goto end; |
| } |
| |
| app_RAND_load_conf(conf, BASE_SECTION); |
| |
| if (verbose) |
| BIO_printf(bio_err, |
| "trying to read " ENV_DATABASE " in section \"%s\"\n", |
| section); |
| |
| srpvfile = lookup_conf(conf, section, ENV_DATABASE); |
| if (srpvfile == NULL) |
| goto end; |
| } |
| |
| if (verbose) |
| BIO_printf(bio_err, "Trying to read SRP verifier file \"%s\"\n", |
| srpvfile); |
| |
| db = load_index(srpvfile, NULL); |
| 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"); |
| |
| while (mode == OPT_LIST || user != NULL) { |
| int userindex = -1; |
| |
| if (user != NULL && 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] = OPENSSL_strdup(user); |
| row[DB_srptype] = OPENSSL_strdup("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)) |
| || !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] = 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; |
| } |