diff options
Diffstat (limited to 'conf.c')
-rw-r--r-- | conf.c | 255 |
1 files changed, 255 insertions, 0 deletions
@@ -0,0 +1,255 @@ +/* Copyright 2010-2013 NORDUnet A/S. All rights reserved. + See LICENSE for licensing information. */ + +#if defined HAVE_CONFIG_H +#include <config.h> +#endif + +#include <confuse.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <radsec/radsec.h> +#include <radsec/radsec-impl.h> +#include "peer.h" +#include "util.h" +#include "debug.h" + +#if 0 + # common config options + + # common realm config options + realm STRING { + type = "UDP"|"TCP"|"TLS"|"DTLS" + timeout = INT + retries = INT + cacertfile = STRING + #cacertpath = STRING + certfile = STRING + certkeyfile = STRING + pskstr = STRING # Transport pre-shared key, UTF-8 form. + pskhexstr = STRING # Transport pre-shared key, ASCII hex form. + pskid = STRING + pskex = "PSK"|"DHE_PSK"|"RSA_PSK" + disable_hostname_check = "yes"|"no" + } + + # client specific realm config options + realm STRING { + server { + hostname = STRING + service = STRING + secret = STRING # RADIUS secret + } + } +#endif + +/* FIXME: Leaking memory in error cases. */ +int +rs_context_read_config(struct rs_context *ctx, const char *config_file) +{ + cfg_t *cfg, *cfg_realm, *cfg_server; + int err = 0; + int i, j; + const char *s; + struct rs_config *config = NULL; + + cfg_opt_t server_opts[] = + { + CFG_STR ("hostname", NULL, CFGF_NONE), + CFG_STR ("service", "2083", CFGF_NONE), + CFG_STR ("secret", "radsec", CFGF_NONE), + CFG_END () + }; + cfg_opt_t realm_opts[] = + { + CFG_STR ("type", "UDP", CFGF_NONE), + CFG_INT ("timeout", 2, CFGF_NONE), /* FIXME: Remove? */ + CFG_INT ("retries", 2, CFGF_NONE), /* FIXME: Remove? */ + CFG_STR ("cacertfile", NULL, CFGF_NONE), + /*CFG_STR ("cacertpath", NULL, CFGF_NONE),*/ + CFG_STR ("certfile", NULL, CFGF_NONE), + CFG_STR ("certkeyfile", NULL, CFGF_NONE), + CFG_STR ("pskstr", NULL, CFGF_NONE), + CFG_STR ("pskhexstr", NULL, CFGF_NONE), + CFG_STR ("pskid", NULL, CFGF_NONE), + CFG_STR ("pskex", "PSK", CFGF_NONE), + CFG_BOOL ("disable_hostname_check", cfg_false, CFGF_NONE), + CFG_SEC ("server", server_opts, CFGF_MULTI), + CFG_END () + }; + cfg_opt_t opts[] = + { + CFG_SEC ("realm", realm_opts, CFGF_TITLE | CFGF_MULTI), + CFG_END () + }; + + cfg = cfg_init (opts, CFGF_NONE); + if (cfg == NULL) + return rs_err_ctx_push (ctx, RSE_CONFIG, "unable to initialize libconfuse"); + err = cfg_parse (cfg, config_file); + switch (err) + { + case CFG_SUCCESS: + break; + case CFG_FILE_ERROR: + return rs_err_ctx_push (ctx, RSE_CONFIG, + "%s: unable to open configuration file", + config_file); + case CFG_PARSE_ERROR: + return rs_err_ctx_push (ctx, RSE_CONFIG, "%s: invalid configuration file", + config_file); + default: + return rs_err_ctx_push (ctx, RSE_CONFIG, "%s: unknown parse error", + config_file); + } + + config = rs_calloc (ctx, 1, sizeof (*config)); + if (config == NULL) + return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, NULL); + ctx->config = config; + + for (i = 0; i < cfg_size (cfg, "realm"); i++) + { + struct rs_realm *r = NULL; + const char *typestr; + char *pskstr = NULL, *pskhexstr = NULL; + + r = rs_calloc (ctx, 1, sizeof(*r)); + if (r == NULL) + return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, NULL); + if (config->realms != NULL) + { + r->next = config->realms->next; + config->realms->next = r; + } + else + { + config->realms = r; + } + cfg_realm = cfg_getnsec (cfg, "realm", i); + s = cfg_title (cfg_realm); + if (s == NULL) + return rs_err_ctx_push_fl (ctx, RSE_CONFIG, __FILE__, __LINE__, + "missing realm name"); + /* We use a copy of the return value of cfg_title() since it's const. */ + r->name = rs_strdup (ctx, s); + if (r->name == NULL) + return RSE_NOMEM; + + typestr = cfg_getstr (cfg_realm, "type"); + if (strcmp (typestr, "UDP") == 0) + r->type = RS_CONN_TYPE_UDP; + else if (strcmp (typestr, "TCP") == 0) + r->type = RS_CONN_TYPE_TCP; + else if (strcmp (typestr, "TLS") == 0) + r->type = RS_CONN_TYPE_TLS; + else if (strcmp (typestr, "DTLS") == 0) + r->type = RS_CONN_TYPE_DTLS; + else + return rs_err_ctx_push (ctx, RSE_CONFIG, + "%s: invalid connection type: %s", + r->name, typestr); + r->timeout = cfg_getint (cfg_realm, "timeout"); + r->retries = cfg_getint (cfg_realm, "retries"); + r->disable_hostname_check = cfg_getbool (cfg_realm, "disable_hostname_check"); + + r->cacertfile = cfg_getstr (cfg_realm, "cacertfile"); + /*r->cacertpath = cfg_getstr (cfg_realm, "cacertpath");*/ + r->certfile = cfg_getstr (cfg_realm, "certfile"); + r->certkeyfile = cfg_getstr (cfg_realm, "certkeyfile"); + + pskstr = cfg_getstr (cfg_realm, "pskstr"); + pskhexstr = cfg_getstr (cfg_realm, "pskhexstr"); + if (pskstr || pskhexstr) + { +#if defined RS_ENABLE_TLS_PSK + char *kex = cfg_getstr (cfg_realm, "pskex"); + rs_cred_type_t type = RS_CRED_NONE; + struct rs_credentials *cred = NULL; + assert (kex != NULL); + + if (!strcmp (kex, "PSK")) + type = RS_CRED_TLS_PSK; + else + { + /* TODO: push a warning on the error stack:*/ + /*rs_err_ctx_push (ctx, RSE_WARN, "%s: unsupported PSK key exchange" + " algorithm -- PSK not used", kex);*/ + } + + if (type != RS_CRED_NONE) + { + cred = rs_calloc (ctx, 1, sizeof (*cred)); + if (cred == NULL) + return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, + NULL); + cred->type = type; + cred->identity = cfg_getstr (cfg_realm, "pskid"); + if (pskhexstr) + { + cred->secret_encoding = RS_KEY_ENCODING_ASCII_HEX; + cred->secret = pskhexstr; + if (pskstr) + ; /* TODO: warn that we're ignoring pskstr */ + } + else + { + cred->secret_encoding = RS_KEY_ENCODING_UTF8; + cred->secret = pskstr; + } + + r->transport_cred = cred; + } +#else /* !RS_ENABLE_TLS_PSK */ + /* TODO: push a warning on the error stack: */ + /* rs_err_ctx_push (ctx, RSE_WARN, "libradsec wasn't configured with " + "support for TLS preshared keys, ignoring pskstr " + "and pskhexstr");*/ +#endif /* RS_ENABLE_TLS_PSK */ + } + + /* For TLS and DTLS realms, validate that we either have (i) CA + cert file or path or (ii) PSK. */ + if ((r->type == RS_CONN_TYPE_TLS || r->type == RS_CONN_TYPE_DTLS) + && (r->cacertfile == NULL && r->cacertpath == NULL) + && r->transport_cred == NULL) + return rs_err_ctx_push (ctx, RSE_CONFIG, + "%s: missing both CA file/path and PSK", + r->name); + + /* Add peers, one per server stanza. */ + for (j = 0; j < cfg_size (cfg_realm, "server"); j++) + { + struct rs_peer *p = peer_create (ctx, &r->peers); + if (p == NULL) + return rs_err_ctx_push_fl (ctx, RSE_NOMEM, __FILE__, __LINE__, + NULL); + p->realm = r; + + cfg_server = cfg_getnsec (cfg_realm, "server", j); + p->hostname = cfg_getstr (cfg_server, "hostname"); + p->service = cfg_getstr (cfg_server, "service"); + p->secret = cfg_getstr (cfg_server, "secret"); + } + } + + /* Save config object in context, for freeing in rs_context_destroy(). */ + ctx->config->cfg = cfg; + + return RSE_OK; +} + +struct rs_realm * +rs_conf_find_realm(struct rs_context *ctx, const char *name) +{ + struct rs_realm *r; + assert (ctx); + + if (ctx->config) + for (r = ctx->config->realms; r; r = r->next) + if (strcmp (r->name, name) == 0) + return r; + + return NULL; +} |