diff options
Diffstat (limited to 'sample/sample-plugins/log/log_v3.c')
| -rw-r--r-- | sample/sample-plugins/log/log_v3.c | 369 |
1 files changed, 201 insertions, 168 deletions
diff --git a/sample/sample-plugins/log/log_v3.c b/sample/sample-plugins/log/log_v3.c index 275b1e7..9037225 100644 --- a/sample/sample-plugins/log/log_v3.c +++ b/sample/sample-plugins/log/log_v3.c @@ -5,7 +5,7 @@ * packet encryption, packet authentication, and * packet compression. * - * Copyright (C) 2002-2009 OpenVPN Technologies, Inc. <sales@openvpn.net> + * Copyright (C) 2002-2017 OpenVPN Technologies, Inc. <sales@openvpn.net> * Copyright (C) 2010 David Sommerseth <dazo@users.sourceforge.net> * * This program is free software; you can redistribute it and/or modify @@ -44,8 +44,8 @@ * Our context, where we keep our state. */ struct plugin_context { - const char *username; - const char *password; + const char *username; + const char *password; }; /* @@ -54,205 +54,238 @@ struct plugin_context { * if found or NULL otherwise. */ static const char * -get_env (const char *name, const char *envp[]) +get_env(const char *name, const char *envp[]) { - if (envp) + if (envp) { - int i; - const int namelen = strlen (name); - for (i = 0; envp[i]; ++i) - { - if (!strncmp (envp[i], name, namelen)) - { - const char *cp = envp[i] + namelen; - if (*cp == '=') - return cp + 1; - } - } + int i; + const int namelen = strlen(name); + for (i = 0; envp[i]; ++i) + { + if (!strncmp(envp[i], name, namelen)) + { + const char *cp = envp[i] + namelen; + if (*cp == '=') + { + return cp + 1; + } + } + } } - return NULL; + return NULL; } OPENVPN_EXPORT int -openvpn_plugin_open_v3 (const int v3structver, - struct openvpn_plugin_args_open_in const *args, - struct openvpn_plugin_args_open_return *ret) +openvpn_plugin_open_v3(const int v3structver, + struct openvpn_plugin_args_open_in const *args, + struct openvpn_plugin_args_open_return *ret) { - struct plugin_context *context = NULL; - - /* Check that we are API compatible */ - if( v3structver != OPENVPN_PLUGINv3_STRUCTVER ) { - printf("log_v3: ** ERROR ** Incompatible plug-in interface between this plug-in and OpenVPN\n"); - return OPENVPN_PLUGIN_FUNC_ERROR; - } - - if( args->ssl_api != SSLAPI_OPENSSL ) { - printf("This plug-in can only be used against OpenVPN with OpenSSL\n"); - return OPENVPN_PLUGIN_FUNC_ERROR; - } - - /* Print some version information about the OpenVPN process using this plug-in */ - printf("log_v3: OpenVPN %s (Major: %i, Minor: %i, Patch: %s)\n", - args->ovpn_version, args->ovpn_version_major, - args->ovpn_version_minor, args->ovpn_version_patch); - - /* Which callbacks to intercept. */ - ret->type_mask = - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_UP) | - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_DOWN) | - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_ROUTE_UP) | - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_IPCHANGE) | - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_TLS_VERIFY) | - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY) | - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_CLIENT_CONNECT_V2) | - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_CLIENT_DISCONNECT) | - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_LEARN_ADDRESS) | - OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_TLS_FINAL); - - - /* Allocate our context */ - context = (struct plugin_context *) calloc (1, sizeof (struct plugin_context)); - - /* Set the username/password we will require. */ - context->username = "foo"; - context->password = "bar"; - - /* Point the global context handle to our newly created context */ - ret->handle = (void *) context; - - return OPENVPN_PLUGIN_FUNC_SUCCESS; + struct plugin_context *context = NULL; + + /* Check that we are API compatible */ + if (v3structver != OPENVPN_PLUGINv3_STRUCTVER) + { + printf("log_v3: ** ERROR ** Incompatible plug-in interface between this plug-in and OpenVPN\n"); + return OPENVPN_PLUGIN_FUNC_ERROR; + } + + if (args->ssl_api != SSLAPI_OPENSSL) + { + printf("This plug-in can only be used against OpenVPN with OpenSSL\n"); + return OPENVPN_PLUGIN_FUNC_ERROR; + } + + /* Print some version information about the OpenVPN process using this plug-in */ + printf("log_v3: OpenVPN %s (Major: %i, Minor: %i, Patch: %s)\n", + args->ovpn_version, args->ovpn_version_major, + args->ovpn_version_minor, args->ovpn_version_patch); + + /* Which callbacks to intercept. */ + ret->type_mask = + OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_UP) + |OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_DOWN) + |OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_ROUTE_UP) + |OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_IPCHANGE) + |OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_TLS_VERIFY) + |OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY) + |OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_CLIENT_CONNECT_V2) + |OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_CLIENT_DISCONNECT) + |OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_LEARN_ADDRESS) + |OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_TLS_FINAL); + + + /* Allocate our context */ + context = (struct plugin_context *) calloc(1, sizeof(struct plugin_context)); + + /* Set the username/password we will require. */ + context->username = "foo"; + context->password = "bar"; + + /* Point the global context handle to our newly created context */ + ret->handle = (void *) context; + + return OPENVPN_PLUGIN_FUNC_SUCCESS; } void -show (const int type, const char *argv[], const char *envp[]) +show(const int type, const char *argv[], const char *envp[]) { - size_t i; - switch (type) + size_t i; + switch (type) { - case OPENVPN_PLUGIN_UP: - printf ("OPENVPN_PLUGIN_UP\n"); - break; - case OPENVPN_PLUGIN_DOWN: - printf ("OPENVPN_PLUGIN_DOWN\n"); - break; - case OPENVPN_PLUGIN_ROUTE_UP: - printf ("OPENVPN_PLUGIN_ROUTE_UP\n"); - break; - case OPENVPN_PLUGIN_IPCHANGE: - printf ("OPENVPN_PLUGIN_IPCHANGE\n"); - break; - case OPENVPN_PLUGIN_TLS_VERIFY: - printf ("OPENVPN_PLUGIN_TLS_VERIFY\n"); - break; - case OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY: - printf ("OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY\n"); - break; - case OPENVPN_PLUGIN_CLIENT_CONNECT_V2: - printf ("OPENVPN_PLUGIN_CLIENT_CONNECT_V2\n"); - break; - case OPENVPN_PLUGIN_CLIENT_DISCONNECT: - printf ("OPENVPN_PLUGIN_CLIENT_DISCONNECT\n"); - break; - case OPENVPN_PLUGIN_LEARN_ADDRESS: - printf ("OPENVPN_PLUGIN_LEARN_ADDRESS\n"); - break; - case OPENVPN_PLUGIN_TLS_FINAL: - printf ("OPENVPN_PLUGIN_TLS_FINAL\n"); - break; - default: - printf ("OPENVPN_PLUGIN_?\n"); - break; + case OPENVPN_PLUGIN_UP: + printf("OPENVPN_PLUGIN_UP\n"); + break; + + case OPENVPN_PLUGIN_DOWN: + printf("OPENVPN_PLUGIN_DOWN\n"); + break; + + case OPENVPN_PLUGIN_ROUTE_UP: + printf("OPENVPN_PLUGIN_ROUTE_UP\n"); + break; + + case OPENVPN_PLUGIN_IPCHANGE: + printf("OPENVPN_PLUGIN_IPCHANGE\n"); + break; + + case OPENVPN_PLUGIN_TLS_VERIFY: + printf("OPENVPN_PLUGIN_TLS_VERIFY\n"); + break; + + case OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY: + printf("OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY\n"); + break; + + case OPENVPN_PLUGIN_CLIENT_CONNECT_V2: + printf("OPENVPN_PLUGIN_CLIENT_CONNECT_V2\n"); + break; + + case OPENVPN_PLUGIN_CLIENT_DISCONNECT: + printf("OPENVPN_PLUGIN_CLIENT_DISCONNECT\n"); + break; + + case OPENVPN_PLUGIN_LEARN_ADDRESS: + printf("OPENVPN_PLUGIN_LEARN_ADDRESS\n"); + break; + + case OPENVPN_PLUGIN_TLS_FINAL: + printf("OPENVPN_PLUGIN_TLS_FINAL\n"); + break; + + default: + printf("OPENVPN_PLUGIN_?\n"); + break; } - printf ("ARGV\n"); - for (i = 0; argv[i] != NULL; ++i) - printf ("%d '%s'\n", (int)i, argv[i]); + printf("ARGV\n"); + for (i = 0; argv[i] != NULL; ++i) + printf("%d '%s'\n", (int)i, argv[i]); - printf ("ENVP\n"); - for (i = 0; envp[i] != NULL; ++i) - printf ("%d '%s'\n", (int)i, envp[i]); + printf("ENVP\n"); + for (i = 0; envp[i] != NULL; ++i) + printf("%d '%s'\n", (int)i, envp[i]); } static void -x509_print_info (X509 *x509crt) +x509_print_info(X509 *x509crt) { - int i, n; - int fn_nid; - ASN1_OBJECT *fn; - ASN1_STRING *val; - X509_NAME *x509_name; - X509_NAME_ENTRY *ent; - const char *objbuf; - unsigned char *buf; - - x509_name = X509_get_subject_name (x509crt); - n = X509_NAME_entry_count (x509_name); - for (i = 0; i < n; ++i) + int i, n; + int fn_nid; + ASN1_OBJECT *fn; + ASN1_STRING *val; + X509_NAME *x509_name; + X509_NAME_ENTRY *ent; + const char *objbuf; + unsigned char *buf; + + x509_name = X509_get_subject_name(x509crt); + n = X509_NAME_entry_count(x509_name); + for (i = 0; i < n; ++i) { - ent = X509_NAME_get_entry (x509_name, i); - if (!ent) - continue; - fn = X509_NAME_ENTRY_get_object (ent); - if (!fn) - continue; - val = X509_NAME_ENTRY_get_data (ent); - if (!val) - continue; - fn_nid = OBJ_obj2nid (fn); - if (fn_nid == NID_undef) - continue; - objbuf = OBJ_nid2sn (fn_nid); - if (!objbuf) - continue; - buf = (unsigned char *)1; /* bug in OpenSSL 0.9.6b ASN1_STRING_to_UTF8 requires this workaround */ - if (ASN1_STRING_to_UTF8 (&buf, val) <= 0) - continue; - - printf("X509 %s: %s\n", objbuf, (char *)buf); - OPENSSL_free (buf); + ent = X509_NAME_get_entry(x509_name, i); + if (!ent) + { + continue; + } + fn = X509_NAME_ENTRY_get_object(ent); + if (!fn) + { + continue; + } + val = X509_NAME_ENTRY_get_data(ent); + if (!val) + { + continue; + } + fn_nid = OBJ_obj2nid(fn); + if (fn_nid == NID_undef) + { + continue; + } + objbuf = OBJ_nid2sn(fn_nid); + if (!objbuf) + { + continue; + } + buf = (unsigned char *)1; /* bug in OpenSSL 0.9.6b ASN1_STRING_to_UTF8 requires this workaround */ + if (ASN1_STRING_to_UTF8(&buf, val) <= 0) + { + continue; + } + + printf("X509 %s: %s\n", objbuf, (char *)buf); + OPENSSL_free(buf); } } OPENVPN_EXPORT int -openvpn_plugin_func_v3 (const int version, - struct openvpn_plugin_args_func_in const *args, - struct openvpn_plugin_args_func_return *retptr) +openvpn_plugin_func_v3(const int version, + struct openvpn_plugin_args_func_in const *args, + struct openvpn_plugin_args_func_return *retptr) { - struct plugin_context *context = (struct plugin_context *) args->handle; + struct plugin_context *context = (struct plugin_context *) args->handle; - printf("\nopenvpn_plugin_func_v3() :::::>> "); - show (args->type, args->argv, args->envp); + printf("\nopenvpn_plugin_func_v3() :::::>> "); + show(args->type, args->argv, args->envp); + + /* Dump some X509 information if we're in the TLS_VERIFY phase */ + if ((args->type == OPENVPN_PLUGIN_TLS_VERIFY) && args->current_cert) + { + printf("---- X509 Subject information ----\n"); + printf("Certificate depth: %i\n", args->current_cert_depth); + x509_print_info(args->current_cert); + printf("----------------------------------\n"); + } - /* Dump some X509 information if we're in the TLS_VERIFY phase */ - if ((args->type == OPENVPN_PLUGIN_TLS_VERIFY) && args->current_cert ) { - printf("---- X509 Subject information ----\n"); - printf("Certificate depth: %i\n", args->current_cert_depth); - x509_print_info(args->current_cert); - printf("----------------------------------\n"); - } + /* check entered username/password against what we require */ + if (args->type == OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY) + { + /* get username/password from envp string array */ + const char *username = get_env("username", args->envp); + const char *password = get_env("password", args->envp); - /* check entered username/password against what we require */ - if (args->type == OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY) + if (username && !strcmp(username, context->username) + && password && !strcmp(password, context->password)) + { + return OPENVPN_PLUGIN_FUNC_SUCCESS; + } + else + { + return OPENVPN_PLUGIN_FUNC_ERROR; + } + } + else { - /* get username/password from envp string array */ - const char *username = get_env ("username", args->envp); - const char *password = get_env ("password", args->envp); - - if (username && !strcmp (username, context->username) - && password && !strcmp (password, context->password)) - return OPENVPN_PLUGIN_FUNC_SUCCESS; - else - return OPENVPN_PLUGIN_FUNC_ERROR; + return OPENVPN_PLUGIN_FUNC_SUCCESS; } - else - return OPENVPN_PLUGIN_FUNC_SUCCESS; } OPENVPN_EXPORT void -openvpn_plugin_close_v1 (openvpn_plugin_handle_t handle) +openvpn_plugin_close_v1(openvpn_plugin_handle_t handle) { - struct plugin_context *context = (struct plugin_context *) handle; - free (context); + struct plugin_context *context = (struct plugin_context *) handle; + free(context); } |