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Fwknopd: Backport patch to enable keygen in fwknopd 

Signed-off-by: Jonathan Bennett <jbennett@incomsystems.biz>
lilik-openwrt-22.03
Jonathan Bennett 10 years ago
parent
78c36dfdd6
commit
b0a605c1c3
2 changed files with 428 additions and 1 deletions
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  1. +1
    -1
      net/fwknop/Makefile
  2. +427
    -0
      net/fwknop/patches/001-add-keygen.patch

+ 1
- 1
net/fwknop/Makefile View File

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=fwknop
PKG_VERSION:=2.6.6
PKG_RELEASE:=2
PKG_RELEASE:=3
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
PKG_SOURCE_URL:=http://www.cipherdyne.org/fwknop/download


+ 427
- 0
net/fwknop/patches/001-add-keygen.patch View File

@ -0,0 +1,427 @@
diff --git a/CREDITS b/CREDITS
index de17d9e..38e2108 100644
--- a/CREDITS
+++ b/CREDITS
@@ -1,5 +1,6 @@
Jonathan Bennett
- Contributed OpenWRT support - see the extras/openwrt/ directory.
+ - Suggested the addition of the --key-gen option to fwknopd.
Sebastien Jeanquier
- Assisted with getting fwknop included in BackTrack Linux - the choice
diff --git a/ChangeLog b/ChangeLog
index 21a5093..4daf008 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+fwknop-2.6.7 (05//2015):
+ - Added --key-gen to fwknopd. This feature was suggested by Jonathan
+ Bennett, and will help with ease of use efforts. The first platform to
+ take advantage of this will likely be OpenWRT thanks to Jonathan.
+
fwknop-2.6.6 (04/23/2015):
- [server] Add the ability for fwknopd to function as an generic SPA
gateway. This allows scenarios such as the fwknopd system providing DHCP
diff --git a/client/config_init.c b/client/config_init.c
index cdb233d..f0ae135 100644
--- a/client/config_init.c
+++ b/client/config_init.c
@@ -199,7 +199,7 @@ static int critical_var_array[] =
};
/**
- * @brief Generate Rijndael + HMAC keys from /dev/random (base64 encoded) and exit.
+ * @brief Generate Rijndael + HMAC keys from /dev/urandom (base64 encoded).
*
* @param options FKO command line option structure
*/
diff --git a/client/fwknop_common.h b/client/fwknop_common.h
index aef20c4..c57db02 100644
--- a/client/fwknop_common.h
+++ b/client/fwknop_common.h
@@ -69,8 +69,6 @@
#define MAX_HOSTNAME_LEN 70
#define MAX_URL_HOST_LEN 256
#define MAX_URL_PATH_LEN 1024
-#define MAX_KEY_LEN 128
-#define MAX_B64_KEY_LEN 180
/* fwknop client configuration parameters and values
*/
@@ -156,10 +154,10 @@ typedef struct fko_cli_options
unsigned char use_gpg;
unsigned char use_gpg_agent;
unsigned char gpg_no_signing_pw;
+ unsigned char key_gen;
int time_offset_plus;
int time_offset_minus;
int fw_timeout;
- int key_gen;
char use_rc_stanza[MAX_LINE_LEN];
unsigned char got_named_stanza;
diff --git a/common/common.h b/common/common.h
index b63e7c2..c7b2e57 100644
--- a/common/common.h
+++ b/common/common.h
@@ -157,6 +157,9 @@ enum {
#define MAX_GPG_KEY_ID 128
#define MAX_USERNAME_LEN 30
+#define MAX_KEY_LEN 128
+#define MAX_B64_KEY_LEN 180
+
/* Command line argument / argv handling
*/
#define MAX_CMDLINE_ARGS 30 /*!< should be way more than enough */
diff --git a/doc/fwknop.man.asciidoc b/doc/fwknop.man.asciidoc
index 070ac77..efa99a7 100644
--- a/doc/fwknop.man.asciidoc
+++ b/doc/fwknop.man.asciidoc
@@ -196,6 +196,11 @@ GENERAL OPTIONS
keys are generally more secure than passphrases that are typed in from the
command line.
+*--key-gen-file*='<file>'::
+ Write generated keys to the specified file. Note that the file is
+ overwritten if it already exists. If this option is not given, then
+ *--key-gen* writes the keys to stdout.
+
*--key-len*='<length>'::
Specify the number of bytes for a generated Rijndael key. The maximum size
is currently 128 bytes.
diff --git a/server/cmd_opts.h b/server/cmd_opts.h
index bc1eee1..d7a645c 100644
--- a/server/cmd_opts.h
+++ b/server/cmd_opts.h
@@ -141,6 +141,10 @@ enum {
FW_LIST = 0x200,
FW_LIST_ALL,
FW_FLUSH,
+ KEY_GEN_FILE,
+ KEY_LEN,
+ HMAC_KEY_LEN,
+ HMAC_DIGEST_TYPE,
AFL_PKT_FILE,
GPG_HOME_DIR,
GPG_EXE_PATH,
@@ -178,7 +182,12 @@ static struct option cmd_opts[] =
{"fault-injection-tag", 1, NULL, FAULT_INJECTION_TAG},
{"help", 0, NULL, 'h'},
{"interface", 1, NULL, 'i'},
- {"kill", 0, NULL, 'K'},
+ {"key-gen", 0, NULL, 'k'},
+ {"key-gen-file", 1, NULL, KEY_GEN_FILE },
+ {"key-len", 1, NULL, KEY_LEN },
+ {"hmac-key-len", 1, NULL, HMAC_KEY_LEN },
+ {"hmac-digest-type", 1, NULL, HMAC_DIGEST_TYPE },
+ {"kill", 0, NULL, 'K' },
{"fw-flush", 0, NULL, FW_FLUSH },
{"fw-list", 0, NULL, FW_LIST },
{"fw-list-all", 0, NULL, FW_LIST_ALL },
diff --git a/server/config_init.c b/server/config_init.c
index 0ddceee..2f1d293 100644
--- a/server/config_init.c
+++ b/server/config_init.c
@@ -201,6 +201,69 @@ validate_int_var_ranges(fko_srv_options_t *opts)
return;
}
+/**
+ * @brief Generate Rijndael + HMAC keys from /dev/urandom (base64 encoded).
+ *
+ * @param options FKO command line option structure
+ */
+static void
+generate_keys(fko_srv_options_t *options)
+{
+ char key_base64[MAX_B64_KEY_LEN+1];
+ char hmac_key_base64[MAX_B64_KEY_LEN+1];
+
+ FILE *key_gen_file_ptr = NULL;
+ int res;
+
+ /* Set defaults and validate for --key-gen mode
+ */
+ if(options->key_len == 0)
+ options->key_len = FKO_DEFAULT_KEY_LEN;
+
+ if(options->hmac_key_len == 0)
+ options->hmac_key_len = FKO_DEFAULT_HMAC_KEY_LEN;
+
+ if(options->hmac_type == 0)
+ options->hmac_type = FKO_DEFAULT_HMAC_MODE;
+
+ /* Zero out the key buffers */
+ memset(key_base64, 0x00, sizeof(key_base64));
+ memset(hmac_key_base64, 0x00, sizeof(hmac_key_base64));
+
+ /* Generate the key through libfko */
+ res = fko_key_gen(key_base64, options->key_len,
+ hmac_key_base64, options->hmac_key_len,
+ options->hmac_type);
+
+ if(res != FKO_SUCCESS)
+ {
+ log_msg(LOG_ERR, "%s: fko_key_gen: Error %i - %s",
+ MY_NAME, res, fko_errstr(res));
+ clean_exit(options, NO_FW_CLEANUP, EXIT_FAILURE);
+ }
+
+ if(options->key_gen_file[0] != '\0')
+ {
+ if ((key_gen_file_ptr = fopen(options->key_gen_file, "w")) == NULL)
+ {
+ log_msg(LOG_ERR, "Unable to create key gen file: %s: %s",
+ options->key_gen_file, strerror(errno));
+ clean_exit(options, NO_FW_CLEANUP, EXIT_FAILURE);
+ }
+ fprintf(key_gen_file_ptr, "KEY_BASE64: %s\nHMAC_KEY_BASE64: %s\n",
+ key_base64, hmac_key_base64);
+ fclose(key_gen_file_ptr);
+ fprintf(stdout, "[+] Wrote Rijndael and HMAC keys to: %s",
+ options->key_gen_file);
+ }
+ else
+ {
+ fprintf(stdout, "KEY_BASE64: %s\nHMAC_KEY_BASE64: %s\n",
+ key_base64, hmac_key_base64);
+ }
+ clean_exit(options, NO_FW_CLEANUP, EXIT_SUCCESS);
+}
+
/* Parse the config file...
*/
static void
@@ -427,7 +490,7 @@ validate_options(fko_srv_options_t *opts)
if(opts->config[CONF_ENABLE_DIGEST_PERSISTENCE] == NULL)
set_config_entry(opts, CONF_ENABLE_DIGEST_PERSISTENCE,
DEF_ENABLE_DIGEST_PERSISTENCE);
-
+
/* Enable destination rule.
*/
if(opts->config[CONF_ENABLE_DESTINATION_RULE] == NULL)
@@ -928,8 +991,9 @@ config_init(fko_srv_options_t *opts, int argc, char **argv)
/* First, scan the command-line args for -h/--help or an alternate
* configuration file. If we find an alternate config file, use it,
- * otherwise use the default. We also grab any override config files
- * as well.
+ * otherwise use the default. We also grab any override config files
+ * as well. In addition, we handle key generation here since this is
+ * independent of configuration parsing.
*/
while ((cmd_arg = getopt_long(argc, argv,
GETOPTS_OPTION_STRING, cmd_opts, &index)) != -1) {
@@ -952,6 +1016,45 @@ config_init(fko_srv_options_t *opts, int argc, char **argv)
if(got_override_config > 0)
break;
+ case 'k':
+ opts->key_gen = 1;
+ break;
+ case KEY_GEN_FILE:
+ opts->key_gen = 1;
+ strlcpy(opts->key_gen_file, optarg, sizeof(opts->key_gen_file));
+ break;
+ case KEY_LEN: /* used in --key-gen mode only */
+ opts->key_len = strtol_wrapper(optarg, 1,
+ MAX_KEY_LEN, NO_EXIT_UPON_ERR, &is_err);
+ if(is_err != FKO_SUCCESS)
+ {
+ log_msg(LOG_ERR,
+ "Invalid key length '%s', must be in [%d-%d]",
+ optarg, 1, MAX_KEY_LEN);
+ clean_exit(opts, NO_FW_CLEANUP, EXIT_FAILURE);
+ }
+ break;
+ case HMAC_DIGEST_TYPE: /* used in --key-gen mode only */
+ if((opts->hmac_type = hmac_digest_strtoint(optarg)) < 0)
+ {
+ log_msg(LOG_ERR,
+ "* Invalid hmac digest type: %s, use {md5,sha1,sha256,sha384,sha512}",
+ optarg);
+ clean_exit(opts, NO_FW_CLEANUP, EXIT_FAILURE);
+ }
+ break;
+ case HMAC_KEY_LEN: /* used in --key-gen mode only */
+ opts->hmac_key_len = strtol_wrapper(optarg, 1,
+ MAX_KEY_LEN, NO_EXIT_UPON_ERR, &is_err);
+ if(is_err != FKO_SUCCESS)
+ {
+ log_msg(LOG_ERR,
+ "Invalid hmac key length '%s', must be in [%d-%d]",
+ optarg, 1, MAX_KEY_LEN);
+ clean_exit(opts, NO_FW_CLEANUP, EXIT_FAILURE);
+ }
+ break;
+
/* Look for override configuration file arg.
*/
case 'O':
@@ -965,6 +1068,9 @@ config_init(fko_srv_options_t *opts, int argc, char **argv)
}
}
+ if(opts->key_gen)
+ generate_keys(opts);
+
/* If no alternate configuration file was specified, we use the
* default.
*/
diff --git a/server/fwknopd_common.h b/server/fwknopd_common.h
index ecf2a81..8c33eaa 100644
--- a/server/fwknopd_common.h
+++ b/server/fwknopd_common.h
@@ -585,10 +585,14 @@ typedef struct fko_srv_options
unsigned char fw_list; /* List current firewall rules */
unsigned char fw_list_all; /* List all current firewall rules */
unsigned char fw_flush; /* Flush current firewall rules */
+ unsigned char key_gen; /* Generate keys and exit */
+ unsigned char exit_after_parse_config; /* Parse config and exit */
+
+ /* Operational flags
+ */
unsigned char test; /* Test mode flag */
unsigned char afl_fuzzing; /* SPA pkts from stdin for AFL fuzzing */
unsigned char verbose; /* Verbose mode flag */
- unsigned char exit_after_parse_config; /* Parse config and exit */
unsigned char enable_udp_server; /* Enable UDP server mode */
unsigned char firewd_disable_check_support; /* Don't use firewall-cmd ... -C */
@@ -605,6 +609,13 @@ typedef struct fko_srv_options
int tcp_server_pid;
int lock_fd;
+ /* Values used in --key-gen mode only
+ */
+ char key_gen_file[MAX_PATH_LEN];
+ int key_len;
+ int hmac_key_len;
+ int hmac_type;
+
#if USE_FILE_CACHE
struct digest_cache_list *digest_cache; /* In-memory digest cache list */
#endif
diff --git a/test/tests/basic_operations.pl b/test/tests/basic_operations.pl
index f4dde2e..76a509d 100644
--- a/test/tests/basic_operations.pl
+++ b/test/tests/basic_operations.pl
@@ -390,6 +390,14 @@
'exec_err' => $YES,
'cmdline' => "$default_client_args --key-gen -K " . 'A'x1030
},
+ {
+ 'category' => 'basic operations',
+ 'subcategory' => 'server',
+ 'detail' => '--key-gen file path (-K) too long',
+ 'function' => \&generic_exec,
+ 'exec_err' => $YES,
+ 'cmdline' => "$fwknopdCmd --key-gen --key-gen-file " . 'A'x1030
+ },
{
'category' => 'basic operations',
diff --git a/test/tests/rijndael.pl b/test/tests/rijndael.pl
index 26aab6a..34af65e 100644
--- a/test/tests/rijndael.pl
+++ b/test/tests/rijndael.pl
@@ -421,33 +421,6 @@
'key_file' => $cf{'rc_named_key'},
},
- ### --key-gen tests
- {
- 'category' => 'Rijndael',
- 'subcategory' => 'client',
- 'detail' => '--key-gen',
- 'function' => \&generic_exec,
- 'cmdline' => "$fwknopCmd --key-gen",
- 'positive_output_matches' => [qr/^KEY_BASE64\:?\s\S{10}/,
- qw/HMAC_KEY_BASE64\:?\s\S{10}/],
- },
- {
- 'category' => 'Rijndael',
- 'subcategory' => 'client',
- 'detail' => "--key-gen $uniq_keys key uniqueness",
- 'function' => \&key_gen_uniqueness,
- 'cmdline' => "$fwknopCmd --key-gen", ### no valgrind string (too slow for 100 client exec's)
- 'disable_valgrind' => $YES,
- },
- {
- 'category' => 'Rijndael',
- 'subcategory' => 'client',
- 'detail' => '--key-gen to file',
- 'function' => \&generic_exec,
- 'cmdline' => "$fwknopCmd --key-gen --key-gen-file $key_gen_file",
- 'positive_output_matches' => [qr/Wrote.*\skeys/],
- },
-
### rc file tests
{
'category' => 'Rijndael',
diff --git a/test/tests/rijndael_hmac.pl b/test/tests/rijndael_hmac.pl
index fc1a8af..fd80f04 100644
--- a/test/tests/rijndael_hmac.pl
+++ b/test/tests/rijndael_hmac.pl
@@ -58,6 +58,59 @@
'exec_err' => $YES,
},
+ ### --key-gen tests
+ {
+ 'category' => 'Rijndael+HMAC',
+ 'subcategory' => 'client',
+ 'detail' => '--key-gen',
+ 'function' => \&generic_exec,
+ 'cmdline' => "$fwknopCmd --key-gen",
+ 'positive_output_matches' => [qr/^KEY_BASE64\:?\s\S{10}/,
+ qw/HMAC_KEY_BASE64\:?\s\S{10}/],
+ },
+ {
+ 'category' => 'Rijndael+HMAC',
+ 'subcategory' => 'server',
+ 'detail' => '--key-gen',
+ 'function' => \&generic_exec,
+ 'cmdline' => "$fwknopdCmd --key-gen",
+ 'positive_output_matches' => [qr/^KEY_BASE64\:?\s\S{10}/,
+ qw/HMAC_KEY_BASE64\:?\s\S{10}/],
+ },
+ {
+ 'category' => 'Rijndael+HMAC',
+ 'subcategory' => 'client',
+ 'detail' => "--key-gen $uniq_keys key uniqueness",
+ 'function' => \&key_gen_uniqueness,
+ 'cmdline' => "$fwknopCmd --key-gen", ### no valgrind string (too slow for 100 exec's)
+ 'disable_valgrind' => $YES,
+ },
+ {
+ 'category' => 'Rijndael+HMAC',
+ 'subcategory' => 'server',
+ 'detail' => "--key-gen $uniq_keys key uniqueness",
+ 'function' => \&key_gen_uniqueness,
+ 'cmdline' => "$fwknopdCmd --key-gen", ### no valgrind string (too slow for 100 exec's)
+ 'disable_valgrind' => $YES,
+ },
+ {
+ 'category' => 'Rijndael+HMAC',
+ 'subcategory' => 'client',
+ 'detail' => '--key-gen to file',
+ 'function' => \&generic_exec,
+ 'cmdline' => "$fwknopCmd --key-gen --key-gen-file $key_gen_file",
+ 'positive_output_matches' => [qr/Wrote.*\skeys/],
+ },
+ {
+ 'category' => 'Rijndael+HMAC',
+ 'subcategory' => 'server',
+ 'detail' => '--key-gen to file',
+ 'function' => \&generic_exec,
+ 'cmdline' => "$fwknopdCmd --key-gen --key-gen-file $key_gen_file",
+ 'positive_output_matches' => [qr/Wrote.*\skeys/],
+ },
+
+ ### complete cycle tests
{
'category' => 'Rijndael+HMAC',
'subcategory' => 'client+server',

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