static PyObject *
base64_decode(PyObject *self, PyObject *args)
{
char *in;
unsigned char *out;
int res;
if(!PyArg_ParseTuple(args, "ss", &in, &out))
return NULL;
res = fko_base64_decode(in, out);
return Py_BuildValue("s#", out, res);
}
/* Prompt for and receive a user password.
*/
static int
get_keys(fko_ctx_t ctx, fko_cli_options_t *options,
char *key, int *key_len, char *hmac_key, int *hmac_key_len)
{
#if !AFL_FUZZING
char *key_tmp = NULL, *hmac_key_tmp = NULL;
#endif
int use_hmac = 0, res = 0;
memset(key, 0x0, MAX_KEY_LEN+1);
memset(hmac_key, 0x0, MAX_KEY_LEN+1);
if(options->have_key)
{
strlcpy(key, options->key, MAX_KEY_LEN+1);
*key_len = strlen(key);
}
else if(options->have_base64_key)
{
*key_len = fko_base64_decode(options->key_base64,
(unsigned char *) options->key);
if(*key_len > 0 && *key_len < MAX_KEY_LEN)
{
memcpy(key, options->key, *key_len);
}
else
{
log_msg(LOG_VERBOSITY_ERROR, "[*] Invalid key length: '%d', must be in [1,%d]",
*key_len, MAX_KEY_LEN);
return 0;
}
}
else
{
/* If --get-key file was specified grab the key/password from it.
*/
if(options->get_key_file[0] != 0x0)
{
if(get_key_file(key, key_len, options->get_key_file, ctx, options) != 1)
{
return 0;
}
}
else if(options->use_gpg)
{
if(options->use_gpg_agent)
log_msg(LOG_VERBOSITY_NORMAL,
"[+] GPG mode set, signing passphrase acquired via gpg-agent");
else if(options->gpg_no_signing_pw)
log_msg(LOG_VERBOSITY_NORMAL,
"[+] GPG mode set, signing passphrase not required");
else if(strlen(options->gpg_signer_key))
{
#if AFL_FUZZING
strlcpy(key, AFL_ENC_KEY, MAX_KEY_LEN+1);
#else
key_tmp = getpasswd("Enter passphrase for signing: ", options->input_fd);
if(key_tmp == NULL)
{
log_msg(LOG_VERBOSITY_ERROR, "[*] getpasswd() key error.");
return 0;
}
strlcpy(key, key_tmp, MAX_KEY_LEN+1);
#endif
*key_len = strlen(key);
}
}
else
{
#if AFL_FUZZING
strlcpy(key, AFL_ENC_KEY, MAX_KEY_LEN+1);
#else
key_tmp = getpasswd("Enter encryption key: ", options->input_fd);
if(key_tmp == NULL)
{
log_msg(LOG_VERBOSITY_ERROR, "[*] getpasswd() key error.");
return 0;
}
strlcpy(key, key_tmp, MAX_KEY_LEN+1);
#endif
*key_len = strlen(key);
}
}
if(options->have_hmac_key)
{
strlcpy(hmac_key, options->hmac_key, MAX_KEY_LEN+1);
*hmac_key_len = strlen(hmac_key);
use_hmac = 1;
}
else if(options->have_hmac_base64_key)
{
*hmac_key_len = fko_base64_decode(options->hmac_key_base64,
(unsigned char *) options->hmac_key);
if(*hmac_key_len > MAX_KEY_LEN || *hmac_key_len < 0)
{
log_msg(LOG_VERBOSITY_ERROR,
"[*] Invalid decoded key length: '%d', must be in [0,%d]",
*hmac_key_len, MAX_KEY_LEN);
return 0;
}
memcpy(hmac_key, options->hmac_key, *hmac_key_len);
use_hmac = 1;
}
else if (options->use_hmac)
{
/* If --get-key file was specified grab the key/password from it.
*/
if(options->get_hmac_key_file[0] != 0x0)
{
if(get_key_file(hmac_key, hmac_key_len,
options->get_hmac_key_file, ctx, options) != 1)
{
return 0;
}
use_hmac = 1;
}
else
{
#if AFL_FUZZING
strlcpy(hmac_key, AFL_HMAC_KEY, MAX_KEY_LEN+1);
#else
hmac_key_tmp = getpasswd("Enter HMAC key: ", options->input_fd);
if(hmac_key_tmp == NULL)
{
log_msg(LOG_VERBOSITY_ERROR, "[*] getpasswd() key error.");
return 0;
}
strlcpy(hmac_key, hmac_key_tmp, MAX_KEY_LEN+1);
#endif
*hmac_key_len = strlen(hmac_key);
use_hmac = 1;
}
}
if (use_hmac)
{
if(*hmac_key_len < 0 || *hmac_key_len > MAX_KEY_LEN)
{
log_msg(LOG_VERBOSITY_ERROR, "[*] Invalid HMAC key length: '%d', must be in [0,%d]",
*hmac_key_len, MAX_KEY_LEN);
return 0;
}
/* Make sure the same key is not used for both encryption and the HMAC
*/
if(*hmac_key_len == *key_len)
{
if(memcmp(hmac_key, key, *key_len) == 0)
{
log_msg(LOG_VERBOSITY_ERROR,
"[*] The encryption passphrase and HMAC key should not be identical, no SPA packet sent. Exiting.");
return 0;
}
}
res = fko_set_spa_hmac_type(ctx, options->hmac_type);
if(res != FKO_SUCCESS)
{
errmsg("fko_set_spa_hmac_type", res);
return 0;
}
}
return 1;
}
/* JNI interface: constructs arguments and calls main function
*/
jstring Java_biz_incomsystems_fwknop2_SendSPA_sendSPAPacket(JNIEnv* env,
jobject thiz)
{
fko_ctx_t ctx;
fwknop_options_t opts;
int res, hmac_str_len = 0;
short message_type;
short digest_type = FKO_DIGEST_SHA256;
short hmac_type = FKO_HMAC_SHA256;
int key_len, hmac_key_len;
char res_msg[MSG_BUFSIZE+1] = {0};
char spa_msg[MSG_BUFSIZE+1] = {0};
char nat_msg[MSG_BUFSIZE+1] = {0};
jstring ourSpa;
char *key_tmp[MAX_KEY_LEN+1] = {0}, *hmac_key_tmp[MAX_KEY_LEN+1] = {0};
LOGV("**** Init fwknop ****");
memset(&opts, 0, sizeof(fwknop_options_t));
/* Read the member values from the Java Object that called sendSPAPacket() method
*/
jclass c = (*env)->GetObjectClass(env,thiz);
jfieldID fid = (*env)->GetFieldID(env, c, "access_str", "Ljava/lang/String;");
jstring jaccess = (*env)->GetObjectField(env, thiz, fid);
const char *access_str = (*env)->GetStringUTFChars(env, jaccess, 0);
fid = (*env)->GetFieldID(env, c, "allowip_str", "Ljava/lang/String;");
jstring jallowip = (*env)->GetObjectField(env, thiz, fid);
const char *allowip_str = (*env)->GetStringUTFChars(env, jallowip, 0);
fid = (*env)->GetFieldID(env, c, "passwd_str", "Ljava/lang/String;");
jstring jpasswd = (*env)->GetObjectField(env, thiz, fid);
char *passwd_str = (*env)->GetStringUTFChars(env, jpasswd, 0);
fid = (*env)->GetFieldID(env, c, "passwd_b64", "Ljava/lang/String;");
jstring jpasswd_b64 = (*env)->GetObjectField(env, thiz, fid);
const char *passwd_b64 = (*env)->GetStringUTFChars(env, jpasswd_b64, 0);
fid = (*env)->GetFieldID(env, c, "digest_type", "Ljava/lang/String;");
jstring jdigest_type = (*env)->GetObjectField(env, thiz, fid);
char *set_digest_type = (*env)->GetStringUTFChars(env, jdigest_type, 0);
fid = (*env)->GetFieldID(env, c, "hmac_str", "Ljava/lang/String;");
jstring jhmac = (*env)->GetObjectField(env, thiz, fid);
char *hmac_str = (*env)->GetStringUTFChars(env, jhmac, 0);
fid = (*env)->GetFieldID(env, c, "hmac_b64", "Ljava/lang/String;");
jstring jhmac_b64 = (*env)->GetObjectField(env, thiz, fid);
const char *hmac_b64 = (*env)->GetStringUTFChars(env, jhmac_b64, 0);
fid = (*env)->GetFieldID(env, c, "hmac_type", "Ljava/lang/String;");
jstring jhmac_type = (*env)->GetObjectField(env, thiz, fid);
char *set_hmac_type = (*env)->GetStringUTFChars(env, jhmac_type, 0);
fid = (*env)->GetFieldID(env, c, "fw_timeout_str", "Ljava/lang/String;");
jstring jfwtimeout = (*env)->GetObjectField(env, thiz, fid);
const char *fw_timeout_str = (*env)->GetStringUTFChars(env, jfwtimeout, 0);
fid = (*env)->GetFieldID(env, c, "nat_access_str", "Ljava/lang/String;");
jstring jnat_access_str = (*env)->GetObjectField(env, thiz, fid);
const char *nat_access_str = (*env)->GetStringUTFChars(env, jnat_access_str, 0);
fid = (*env)->GetFieldID(env, c, "nat_local", "Ljava/lang/String;");
jstring jnat_local = (*env)->GetObjectField(env, thiz, fid);
const char *nat_local = (*env)->GetStringUTFChars(env, jnat_local, 0);
fid = (*env)->GetFieldID(env, c, "server_cmd_str", "Ljava/lang/String;");
jstring jserver_cmd = (*env)->GetObjectField(env, thiz, fid);
const char *server_cmd_str = (*env)->GetStringUTFChars(env, jserver_cmd, 0);
fid = (*env)->GetFieldID(env, c, "legacy", "Ljava/lang/String;");
jstring jlegacy = (*env)->GetObjectField(env, thiz, fid);
const char *legacy = (*env)->GetStringUTFChars(env, jlegacy, 0);
/* Sanity checks
*/
if(access_str == NULL) {
sprintf(res_msg, "Error: Invalid or missing access string");
goto cleanup2;
}
if(allowip_str == NULL) {
sprintf(res_msg, "Error: Invalid or missing allow IP");
goto cleanup2;
}
if(passwd_str == NULL) {
sprintf(res_msg, "Error: Invalid or missing password");
goto cleanup2;
}
if(fw_timeout_str == NULL) {
sprintf(res_msg, "Error: Invalid or missing firewall timeout value");
goto cleanup2;
}
if(hmac_str != NULL) {
hmac_str_len = (int)strlen(hmac_str);
}
key_len = (int)strlen(passwd_str);
if(legacy == NULL) {
sprintf(legacy, "false");
}
if(strcmp(hmac_b64, "true") == 0) {
hmac_str_len = fko_base64_decode( hmac_str,
(unsigned char *)hmac_key_tmp);
if(hmac_str_len > MAX_KEY_LEN || hmac_str_len < 0)
{
LOGV("[*] Invalid key length: '%d', must be in [1,%d]",
hmac_str_len, MAX_KEY_LEN);
goto cleanup2;
}
else
{
memcpy(hmac_str, hmac_key_tmp, hmac_str_len);
}
}
if(strcmp(passwd_b64, "true") == 0) {
LOGV("Detected key b64");
key_len = fko_base64_decode(passwd_str,
(unsigned char *)key_tmp);
if(key_len > MAX_KEY_LEN || key_len < 0)
{
LOGV( "[*] Invalid key length: '%d', must be in [1,%d]",
key_len, MAX_KEY_LEN);
goto cleanup2;
}
else
{
memcpy(passwd_str, key_tmp, key_len);
}
}
/* Using an HMAC is optional in the pre-rfc mode.
*/
if (server_cmd_str[0] != 0x0) {
message_type = FKO_COMMAND_MSG;
} else {
message_type = FKO_CLIENT_TIMEOUT_NAT_ACCESS_MSG;
}
/* Intialize the context
*/
res = fko_new(&ctx);
if (res != FKO_SUCCESS) {
strcpy(res_msg, fko_errmsg("Unable to create FKO context", res));
goto cleanup2;
}
/* Set server command
*/
if (server_cmd_str[0] != 0x0) {
message_type = FKO_COMMAND_MSG;
fko_set_spa_message_type(ctx, message_type);
res = fko_set_spa_message(ctx, server_cmd_str);
if (res != FKO_SUCCESS) {
strcpy(res_msg, fko_errmsg("Error setting SPA request message", res));
goto cleanup;
}
} else {
/* Set client timeout
*/
res = fko_set_spa_client_timeout(ctx, atoi(fw_timeout_str));
if (res != FKO_SUCCESS) {
strcpy(res_msg, fko_errmsg("Error setting FW timeout", res));
goto cleanup;
}
/* Set the spa message string
*/
snprintf(spa_msg, MSG_BUFSIZE, "%s,%s", allowip_str, access_str);
res = fko_set_spa_message(ctx, spa_msg);
if (res != FKO_SUCCESS) {
strcpy(res_msg, fko_errmsg("Error setting SPA request message", res));
goto cleanup;
}
}
/* Set the HMAC mode if necessary
*/
if (strcmp(legacy, "true") == 0) {
res = fko_set_spa_encryption_mode(ctx, FKO_ENC_MODE_CBC_LEGACY_IV);
if (key_len > 16) {
key_len = 16;
}
}
if (hmac_str_len > 0) {
if (strcmp(set_hmac_type, "MD5") == 0) {
hmac_type = FKO_HMAC_MD5;
} else if (strcmp(set_hmac_type, "SHA1") == 0) {
hmac_type = FKO_HMAC_SHA1;
} else if (strcmp(set_hmac_type, "SHA256") == 0) {
hmac_type = FKO_HMAC_SHA256;
} else if (strcmp(set_hmac_type, "SHA384") == 0) {
hmac_type = FKO_HMAC_SHA384;
} else if (strcmp(set_hmac_type, "SHA512") == 0) {
hmac_type = FKO_HMAC_SHA512;
}
res = fko_set_spa_hmac_type(ctx, hmac_type);
if (res != FKO_SUCCESS) {
strcpy(res_msg, fko_errmsg("Error setting SPA HMAC type", res));
goto cleanup;
}
}
/* Set Nat
*/
if (nat_access_str[0] != 0x0){
// if nat_access_str is not blank, push it into fko context
if (strncmp(nat_local, "true", 4) == 0) {
message_type = FKO_CLIENT_TIMEOUT_LOCAL_NAT_ACCESS_MSG;
fko_set_spa_message_type(ctx, message_type);
LOGV("Finished setting local-nat.");
}
res = fko_set_spa_nat_access(ctx, nat_access_str);
if (res != FKO_SUCCESS) {
strcpy(res_msg, fko_errmsg("Error setting NAT string", res));
goto cleanup;
}
}
LOGV("Setting digest type to %s.", set_digest_type);
if (strcmp(set_digest_type, "MD5") == 0) {
digest_type = FKO_HMAC_MD5;
} else if (strcmp(set_digest_type, "SHA1") == 0) {
digest_type = FKO_HMAC_SHA1;
} else if (strcmp(set_digest_type, "SHA256") == 0) {
digest_type = FKO_HMAC_SHA256;
} else if (strcmp(set_digest_type, "SHA384") == 0) {
digest_type = FKO_HMAC_SHA384;
} else if (strcmp(set_digest_type, "SHA512") == 0) {
digest_type = FKO_HMAC_SHA512;
}
res = fko_set_spa_digest_type(ctx, digest_type);
if (res != FKO_SUCCESS) {
strcpy(res_msg, fko_errmsg("Error setting SPA digest type", res));
goto cleanup;
}
LOGV("Finished setting digest type.");
/* Finalize the context data (Encrypt and encode).
*/
res = fko_spa_data_final(ctx, (char*)passwd_str,
key_len, (char *)hmac_str, hmac_str_len);
if (res != FKO_SUCCESS) {
strcpy(res_msg, fko_errmsg("Error generating SPA data", res));
goto cleanup;
}
LOGV("Finished finalize.");
res = fko_get_spa_data(ctx, &opts.spa_data);
if (res != FKO_SUCCESS) {
strcpy(res_msg, fko_errmsg("Error getting SPA data", res));
goto cleanup;
}
/* Generate the spa data packet
*/
ourSpa = (*env)->NewStringUTF(env, opts.spa_data);
cleanup:
/* Release the resources used by the fko context.
*/
fko_destroy(ctx);
cleanup2:
/* Release mem
*/
(*env)->ReleaseStringUTFChars(env, jaccess, access_str);
(*env)->ReleaseStringUTFChars(env, jallowip, allowip_str);
(*env)->ReleaseStringUTFChars(env, jpasswd, passwd_str);
(*env)->ReleaseStringUTFChars(env, jpasswd_b64, passwd_b64);
(*env)->ReleaseStringUTFChars(env, jdigest_type, set_digest_type);
(*env)->ReleaseStringUTFChars(env, jhmac, hmac_str);
(*env)->ReleaseStringUTFChars(env, jhmac_b64, hmac_b64);
(*env)->ReleaseStringUTFChars(env, jhmac_type, set_hmac_type);
(*env)->ReleaseStringUTFChars(env, jfwtimeout, fw_timeout_str);
(*env)->ReleaseStringUTFChars(env, jnat_access_str, nat_access_str);
(*env)->ReleaseStringUTFChars(env, jnat_local, nat_local);
return ourSpa;
}
static void
spa_encoded_msg_fuzzing(void)
{
fko_ctx_t decode_ctx = NULL;
int res = 0, pkt_id, require_success, require_digest, digest_type, msg_len;
int line_ctr = 0, spa_payload_ctr = 0;
FILE *fz = NULL;
char line[MAX_LINE_LEN] = {0};
char b64_encoded_msg[MAX_LINE_LEN] = {0};
unsigned char b64_decoded_msg[MAX_LINE_LEN] = {0};
/* fuzzing file contents (or from stdin) are formatted like this:
*
* <pkt_ID> <status: success|fail> <digest: yes|no> <digest type> <base64_SPA_payload>
*/
if ((fz = fopen("fuzz_spa_payloads", "r")) == NULL)
return;
while ((fgets(line, MAX_LINE_LEN, fz)) != NULL)
{
line_ctr++;
line[MAX_LINE_LEN-1] = '\0';
if (line[strlen(line)-1] == '\n')
line[strlen(line)-1] = '\0';
if(IS_EMPTY_LINE(line[0]))
continue;
if(sscanf(line, "%d %d %d %d %s", &pkt_id, &require_success,
&require_digest, &digest_type, b64_encoded_msg) != 5)
{
printf("[+] fuzzing parsing error at line: %d\n", line_ctr);
continue;
}
msg_len = fko_base64_decode(b64_encoded_msg, b64_decoded_msg);
spa_payload_ctr++;
fko_new(&decode_ctx);
if ((res = fko_set_encoded_data(decode_ctx, (char *) b64_decoded_msg,
msg_len, require_digest, digest_type)) != FKO_SUCCESS) {
printf("[-] pkt_id: %d, fko_set_encoded_data(): %s\n", pkt_id, fko_errstr(res));
}
res = fko_decode_spa_data(decode_ctx);
if (require_success) {
if (res != FKO_SUCCESS) {
printf("[-] pkt_id: %d, expected decode success but: fko_decode_spa_data(): %s\n",
pkt_id, fko_errstr(res));
}
} else {
if (res == FKO_SUCCESS) {
printf("[-] pkt_id: %d, expected decode failure but: fko_decode_spa_data(): %s\n",
pkt_id, fko_errstr(res));
}
}
fko_destroy(decode_ctx);
memset(line, 0x0, MAX_LINE_LEN);
memset(b64_encoded_msg, 0x0, MAX_LINE_LEN);
}
fclose(fz);
printf("[+] Sent %d SPA payloads through libfko encode/decode cycle...\n",
spa_payload_ctr);
return;
}
static void
test_loop(int new_ctx_flag, int destroy_ctx_flag)
{
fko_ctx_t ctx = NULL, decrypt_ctx = NULL;
int i, j;
char *spa_data = NULL, encode_buf[100], decode_buf[100];
printf("[+] test_loop(): %s, %s\n",
new_ctx_flag == NEW_CTX ? "NEW_CTX" : "NO_NEW_CTX",
destroy_ctx_flag == CTX_DESTROY ? "DESTROY_CTX" : "NO_DESTROY_CTX");
printf("fko_new(): %s\n", fko_errstr(fko_new(&ctx)));
fko_destroy(ctx);
ctx = NULL;
printf("fko_new(): %s\n", fko_errstr(fko_new(&ctx)));
spa_func_getset_int(&ctx, "fko_set_spa_client_timeout",
&fko_set_spa_client_timeout, "fko_get_spa_client_timeout",
&fko_get_spa_client_timeout, -F_INT, F_INT, 10,
new_ctx_flag, destroy_ctx_flag);
spa_func_getset_short(&ctx, "fko_set_spa_message_type",
&fko_set_spa_message_type, "fko_get_spa_message_type",
&fko_get_spa_message_type, FKO_COMMAND_MSG-F_INT,
FKO_LAST_MSG_TYPE+F_INT, FKO_ACCESS_MSG,
NO_DIGEST, new_ctx_flag, destroy_ctx_flag);
spa_func_int(&ctx, "fko_set_timestamp",
&fko_set_timestamp, -F_INT, F_INT, 10,
new_ctx_flag, destroy_ctx_flag);
for (i=0; i<FCN_CALLS; i++) {
printf("fko_set_spa_message(1.1.1.1,tcp/22): %s\n",
fko_errstr(fko_set_spa_message(ctx, "1.1.1.1,tcp/22")));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
for (i=0; i<FCN_CALLS; i++) {
printf("fko_set_spa_nat_access(1.2.3.4,1234): %s\n",
fko_errstr(fko_set_spa_nat_access(ctx, "1.2.3.4,1234")));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
for (i=0; i<FCN_CALLS; i++) {
printf("fko_set_username(someuser): %s\n",
fko_errstr(fko_set_username(ctx, "someuser")));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
spa_func_getset_short(&ctx, "fko_set_spa_encryption_type",
&fko_set_spa_encryption_type, "fko_get_spa_encryption_type",
&fko_get_spa_encryption_type, FKO_ENCRYPTION_INVALID_DATA-F_INT,
FKO_LAST_ENCRYPTION_TYPE+F_INT, FKO_ENCRYPTION_RIJNDAEL,
NO_DIGEST, new_ctx_flag, destroy_ctx_flag);
spa_func_getset_int(&ctx, "fko_set_spa_encryption_mode",
&fko_set_spa_encryption_mode, "fko_get_spa_encryption_mode",
&fko_get_spa_encryption_mode, FKO_ENC_MODE_UNKNOWN-F_INT,
FKO_LAST_ENC_MODE+F_INT, FKO_ENC_MODE_CBC,
new_ctx_flag, destroy_ctx_flag);
if (ENABLE_GPG_TESTS) {
for (i=0; i<FCN_CALLS; i++) {
printf("fko_set_spa_encryption_type(FKO_ENCRYPTION_GPG): %s\n",
fko_errstr(fko_set_spa_encryption_type(ctx, FKO_ENCRYPTION_GPG)));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
for (i=0; i<FCN_CALLS; i++) {
printf("fko_set_gpg_home_dir(/home/mbr/.gnupg): %s\n",
fko_errstr(fko_set_gpg_home_dir(ctx, "/home/mbr/.gnupg")));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
for (i=0; i<FCN_CALLS; i++) {
printf("fko_set_gpg_recipient(1234asdf): %s\n",
fko_errstr(fko_set_gpg_recipient(ctx, "1234asdf")));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
}
spa_func_getset_short(&ctx, "fko_set_spa_digest_type",
&fko_set_spa_digest_type, "fko_get_spa_digest_type",
&fko_get_spa_digest_type, FKO_DIGEST_INVALID_DATA-F_INT,
FKO_LAST_DIGEST_TYPE+F_INT, FKO_DEFAULT_DIGEST,
DO_DIGEST, new_ctx_flag, destroy_ctx_flag);
spa_func_getset_short(&ctx, "fko_set_raw_spa_digest_type",
&fko_set_spa_digest_type, "fko_get_raw_spa_digest_type",
&fko_get_spa_digest_type, FKO_DIGEST_INVALID_DATA-F_INT,
FKO_LAST_DIGEST_TYPE+F_INT, FKO_DEFAULT_DIGEST,
RAW_DIGEST, new_ctx_flag, destroy_ctx_flag);
spa_func_getset_short(&ctx, "fko_set_spa_hmac_type",
&fko_set_spa_hmac_type, "fko_get_spa_hmac_type",
&fko_get_spa_hmac_type, FKO_HMAC_INVALID_DATA-F_INT,
FKO_LAST_HMAC_MODE+F_INT, FKO_HMAC_SHA256,
NO_DIGEST, new_ctx_flag, destroy_ctx_flag);
printf("Trying encrypt / authenticate step with bogus key lengths...\n");
for (i=-100; i < 200; i += 10) {
for (j=-100; j < 200; j += 10) {
fko_spa_data_final(ctx, ENC_KEY, i, HMAC_KEY, j);
fko_spa_data_final(ctx, NULL, i, HMAC_KEY, j);
fko_spa_data_final(ctx, ENC_KEY, i, NULL, j);
fko_spa_data_final(ctx, NULL, i, NULL, j);
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, NO_PRINT);
spa_calls += 4;
}
}
for (i=0; i<FCN_CALLS; i++) {
printf("fko_spa_data_final(ENC_KEY, 16, HMAC_KEY, 16): %s\n",
fko_errstr(fko_spa_data_final(ctx, ENC_KEY, 16, HMAC_KEY, 16)));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
for (i=0; i<FCN_CALLS; i++) {
printf("fko_get_spa_data(): %s\n",
fko_errstr(fko_get_spa_data(ctx, &spa_data)));
printf(" SPA DATA: %s\n", spa_data == NULL ? "<NULL>" : spa_data);
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
printf("fko_new_with_data(): %s (data: %s)\n",
fko_errstr(fko_new_with_data(&decrypt_ctx, spa_data, NULL,
0, FKO_ENC_MODE_CBC, NULL, 0, FKO_HMAC_SHA256)), spa_data);
/* verify hmac, decrypt, and display ctx all together*/
for (i=0; i<FCN_CALLS; i++) {
display_ctx(decrypt_ctx);
printf("fko_verify_hmac() (1): %s\n",
fko_errstr(fko_verify_hmac(decrypt_ctx, HMAC_KEY, 16)));
printf("fko_decrypt_spa_data() (1): %s\n",
fko_errstr(fko_decrypt_spa_data(decrypt_ctx, ENC_KEY, 16)));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
/* now, separately verify hmac, decrypt, and display ctx */
for (i=0; i<FCN_CALLS; i++) {
printf("fko_verify_hmac() (2): %s\n",
fko_errstr(fko_verify_hmac(decrypt_ctx, HMAC_KEY, 16)));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
/* now decrypt */
for (i=0; i<FCN_CALLS; i++) {
printf("fko_decrypt_spa_data() (2): %s\n",
fko_errstr(fko_decrypt_spa_data(decrypt_ctx, ENC_KEY, 16)));
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
for (i=0; i<FCN_CALLS; i++) {
display_ctx(decrypt_ctx);
ctx_update(&ctx, new_ctx_flag, destroy_ctx_flag, DO_PRINT);
}
/* NULL tests */
fko_set_rand_value(ctx, NULL);
fko_set_rand_value(ctx, NULL);
fko_set_username(ctx, NULL);
fko_set_username(ctx, NULL);
fko_set_spa_message(ctx, NULL);
fko_set_spa_message(ctx, NULL);
fko_set_spa_nat_access(ctx, NULL);
fko_set_spa_nat_access(ctx, NULL);
fko_set_spa_server_auth(ctx, NULL);
fko_set_spa_server_auth(ctx, NULL);
fko_set_spa_data(ctx, NULL);
fko_set_spa_data(ctx, NULL);
spa_calls += 12;
for (i=0; i<FCN_CALLS; i++) {
fko_destroy(ctx);
ctx = NULL;
}
for (i=0; i<FCN_CALLS; i++) {
fko_destroy(decrypt_ctx);
decrypt_ctx = NULL;
}
/* exercise the base64 encode/decode wrapper
*/
fko_base64_encode((unsigned char *)ENC_KEY, encode_buf, 16);
fko_base64_decode(encode_buf, (unsigned char *)decode_buf);
/* call fko_errstr() across valid and invalid values
*/
for (i=-5; i < FKO_LAST_ERROR+5; i++) {
printf("libfko error (%d): %s\n", i, fko_errstr(i));
spa_calls++;
}
return;
}
wxString Config::gen_SPA(wxString ip_resolver_url, wxString gpgEngine, wxString gpgHomeFolder, bool debug)
{
CURLcode curl_Res;
fko_ctx_t ctx;
fwknop_options_t opts;
int key_len = 0;
int res;
int hmac_str_len = 0;
short message_type = FKO_CLIENT_TIMEOUT_NAT_ACCESS_MSG;
short digest_type = FKO_DIGEST_SHA256;
short hmac_type = FKO_HMAC_SHA256;
char key_str[129] = {0}, hmac_str[129] = {0};
char spa_msg[256] = {0};
// char spa_buf[4096] = {0};
// char * spa_buf_ptr;
// char crypt_buf[4096] = {0};
char nat_access_str[25] = {0};
// char * hmac_buf;
// char * spa_digest_ptr;
memset(&opts, 0, sizeof(fwknop_options_t));
if (this->KEY.IsEmpty() && !this->USE_GPG_CRYPT)
return _("Key cannot be blank!");
wxBusyInfo wait(_("Please wait, working..."));
if (this->SERVER_PORT.CmpNoCase(wxT("random")) == 0)
{
srand((int)wxGetLocalTime());
this->SERVER_PORT.Empty();
this->SERVER_PORT << (rand()%55535 + 10000); // do this better, this isn't a horribly good random function
}
if (this->ACCESS_IP.CmpNoCase(wxT("Source IP")) == 0)
this->ACCESS_IP = wxT("0.0.0.0");
else if (this->ACCESS_IP.CmpNoCase(wxT("Resolve IP")) == 0)
{
std::ostringstream oss;
curl_Res = curl_read(std::string(ip_resolver_url.mb_str()), oss);
if (curl_Res == CURLE_OK)
{
wxString result_tmp = wxString::FromUTF8(oss.str().c_str());
wxRegEx findIP( wxT("(([0-9]{1}|[0-9]{2}|[0-1][0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]{1}|[0-9]{2}|[0-1][0-9]{2}|2[0-4][0-9]|25[0-5])"));
if (!findIP.Matches(result_tmp))
return _("Unable to resolve our IP!");
this->ACCESS_IP = findIP.GetMatch(result_tmp);
} else
return _("Libcurl returned the error: ") + wxString::FromUTF8(curl_easy_strerror(curl_Res));
} //end resolve ip
if (fko_new(&ctx) != FKO_SUCCESS)
return _("Could not get new FKO context");
if (USE_GPG_CRYPT) {
fko_set_spa_encryption_type(ctx, FKO_ENCRYPTION_GPG);
fko_set_gpg_exe(ctx, gpgEngine.mb_str());
fko_set_gpg_home_dir(ctx, gpgHomeFolder.mb_str());
fko_set_gpg_recipient(ctx, GPG_CRYPT_ID.mb_str());
if (GPG_SIG_ID.CmpNoCase(_("None")) != 0)
fko_set_gpg_signer(ctx, GPG_SIG_ID.mb_str());
fko_set_spa_encryption_mode(ctx, FKO_ENC_MODE_ASYMMETRIC);
} else {
if (this->KEY_BASE64)
{
key_len = fko_base64_decode(this->KEY.mb_str(), (unsigned char *)key_str);
} else {
strncpy(key_str, (const char*)this->KEY.mb_str(wxConvUTF8), 128);
key_len = (int)strlen(key_str);
}
}
if (this->HMAC_BASE64)
{
hmac_str_len = fko_base64_decode(this->HMAC.mb_str(), (unsigned char *)hmac_str);
} else {
strncpy(hmac_str, (const char*)this->HMAC.mb_str(wxConvUTF8), 128);
hmac_str_len = (int)strlen(hmac_str);
}
if (MESS_TYPE.CmpNoCase(wxT("Server Command")) == 0)
{
message_type = FKO_COMMAND_MSG;
if (fko_set_spa_message_type(ctx, message_type) != FKO_SUCCESS)
return _("Could not set message type");
snprintf(spa_msg, 256, "%s,%s", (const char*)this->ACCESS_IP.mb_str(wxConvUTF8), (const char*)this->SERVER_CMD.mb_str(wxConvUTF8));
res = fko_set_spa_message(ctx, spa_msg);
if (res != FKO_SUCCESS)
return _("Could not set command message");
} else {
if (fko_set_spa_client_timeout(ctx, wxAtoi(this->SERVER_TIMEOUT)) != FKO_SUCCESS)
return _("Could not set SPA timeout");
snprintf(spa_msg, 256, "%s,%s", (const char*)this->ACCESS_IP.mb_str(wxConvUTF8), (const char*)this->PORTS.mb_str(wxConvUTF8));
if (fko_set_spa_message(ctx, spa_msg) != FKO_SUCCESS)
return _("Could not set SPA Message");
}
if (this->LEGACY) { // technically should trim hmac keys
if (fko_set_spa_encryption_mode(ctx, FKO_ENC_MODE_CBC_LEGACY_IV) != FKO_SUCCESS)
return _("Could not set Legacy mode.");
}
if (!this->HMAC.IsEmpty()){
if (this->HMAC_TYPE.CmpNoCase(wxT("MD5"))==0)
hmac_type = FKO_HMAC_MD5;
else if (this->HMAC_TYPE.CmpNoCase(wxT("SHA1"))==0)
hmac_type = FKO_HMAC_SHA1;
else if (this->HMAC_TYPE.CmpNoCase(wxT("SHA256"))==0)
hmac_type = FKO_HMAC_SHA256;
else if (this->HMAC_TYPE.CmpNoCase(wxT("SHA384"))==0)
hmac_type = FKO_HMAC_SHA384;
else if (this->HMAC_TYPE.CmpNoCase(wxT("SHA512"))==0)
hmac_type = FKO_HMAC_SHA512;
if (fko_set_spa_hmac_type(ctx, hmac_type) != FKO_SUCCESS)
return _("Could not set HMAC type.");
}
if (this->MESS_TYPE.CmpNoCase(wxT("Nat Access")) == 0)
{
sprintf(nat_access_str, "%s,%s", (const char*)this->NAT_IP.mb_str(wxConvUTF8), (const char*)this->NAT_PORT.mb_str(wxConvUTF8));
if (fko_set_spa_nat_access(ctx, nat_access_str) != FKO_SUCCESS)
return _("Could not set nat access string.");
} else if (this->MESS_TYPE.CmpNoCase(wxT("Local Nat Access")) == 0) {
message_type = FKO_CLIENT_TIMEOUT_LOCAL_NAT_ACCESS_MSG;
if (fko_set_spa_message_type(ctx, message_type) != FKO_SUCCESS)
return _("Chould not set message type");
sprintf(nat_access_str, "%s,%s", (const char*)this->SERVER_IP.mb_str(wxConvUTF8), (const char*)this->NAT_PORT.mb_str(wxConvUTF8));
if (fko_set_spa_nat_access(ctx, nat_access_str) != FKO_SUCCESS)
return _("Could not set nat access string.");
}
if (this->DIGEST_TYPE.CmpNoCase(wxT("MD5"))==0)
digest_type = FKO_DIGEST_MD5;
else if (this->DIGEST_TYPE.CmpNoCase(wxT("SHA1"))==0)
digest_type = FKO_DIGEST_SHA1;
else if (this->DIGEST_TYPE.CmpNoCase(wxT("SHA256"))==0)
digest_type = FKO_DIGEST_SHA256;
else if (this->DIGEST_TYPE.CmpNoCase(wxT("SHA384"))==0)
digest_type = FKO_DIGEST_SHA384;
else if (this->DIGEST_TYPE.CmpNoCase(wxT("SHA512"))==0)
digest_type = FKO_DIGEST_SHA512;
if (fko_set_spa_digest_type(ctx, digest_type) != FKO_SUCCESS)
return _("Could not set SPA digest type.");
if (fko_spa_data_final(ctx, key_str, key_len, hmac_str, hmac_str_len) != FKO_SUCCESS)
return _("Could not generate SPA data.");
if (fko_get_spa_data(ctx, &opts.spa_data) != FKO_SUCCESS)
return _("Could not retrieve SPA data.");
// if (!USE_GPG_CRYPT) {
this->SPA_STRING = wxString::FromUTF8(opts.spa_data);
/*} else { //could retain this for libfko without gpg support
fko_get_encoded_data(ctx, &spa_buf_ptr);
fko_get_spa_digest(ctx, &spa_digest_ptr);
sprintf(spa_buf,"%s:%s", spa_buf_ptr, spa_digest_ptr);
ourGPG->encryptAndSign(GPG_CRYPT_ID, GPG_SIG_ID, spa_buf, crypt_buf);
fko_set_spa_data(ctx, crypt_buf);
fko_set_spa_hmac(ctx, hmac_str, hmac_str_len);
fko_get_spa_hmac(ctx, &hmac_buf);
strcat(crypt_buf, hmac_buf);
this->SPA_STRING = wxString::FromUTF8(crypt_buf + 2);
}*/
if (debug) {
wxTextEntryDialog *debugMessage = new wxTextEntryDialog(NULL, _("Debug info"), _("Debug info"), "Source IP: " + this->ACCESS_IP +"\n" + "SPA String: " + this->SPA_STRING, wxOK | wxTE_MULTILINE );
debugMessage->SetSize(620, 320);
debugMessage->ShowModal();
debugMessage->Destroy();
}
return _("Success");
}
wxString Config::gen_SPA(wxString ip_resolver_url)
{
CURLcode curl_Res;
fko_ctx_t ctx;
fwknop_options_t opts;
int key_len, res;
int hmac_str_len = 0;
short message_type = FKO_CLIENT_TIMEOUT_NAT_ACCESS_MSG;
short digest_type = FKO_DIGEST_SHA256;
short hmac_type = FKO_HMAC_SHA256;
char key_str[129] = {0}, hmac_str[129] = {0};
char spa_msg[256] = {0};
char debug_buf[4096] = {0};
char nat_access_str[25] = {0};
memset(&opts, 0, sizeof(fwknop_options_t));
if (this->KEY.IsEmpty())
return _("Key cannot be blank!");
wxBusyInfo wait(_("Please wait, working..."));
if (this->SERVER_PORT.CmpNoCase(wxT("random")) == 0)
{
srand((int)wxGetLocalTime());
this->SERVER_PORT.Empty();
this->SERVER_PORT << (rand()%55535 + 10000); // do this better, this isn't a horribly good random function
}
if (this->ACCESS_IP.CmpNoCase(wxT("Source IP")) == 0)
this->ACCESS_IP = wxT("0.0.0.0");
else if (this->ACCESS_IP.CmpNoCase(wxT("Resolve IP")) == 0)
{
std::ostringstream oss;
curl_Res = curl_read(std::string(ip_resolver_url.mb_str()), oss); //Eventually make this a user definable service.
if (curl_Res == CURLE_OK)
{
wxString result_tmp = wxString::FromUTF8(oss.str().c_str());
wxRegEx findIP( wxT("(([0-9]{1}|[0-9]{2}|[0-1][0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]{1}|[0-9]{2}|[0-1][0-9]{2}|2[0-4][0-9]|25[0-5])"));
if (!findIP.Matches(result_tmp))
return _("Unable to resolve our IP!");
this->ACCESS_IP = findIP.GetMatch(result_tmp);
} else
return _("Libcurl returned the error: ") + wxString::FromUTF8(curl_easy_strerror(curl_Res));
} //end resolve ip
if (this->KEY_BASE64)
{
key_len = fko_base64_decode(this->KEY.mb_str(), (unsigned char *)key_str);
} else {
strncpy(key_str, (const char*)this->KEY.mb_str(wxConvUTF8), 128);
key_len = (int)strlen(key_str);
}
if (this->HMAC_BASE64)
{
hmac_str_len = fko_base64_decode(this->HMAC.mb_str(), (unsigned char *)hmac_str);
} else {
strncpy(hmac_str, (const char*)this->HMAC.mb_str(wxConvUTF8), 128);
hmac_str_len = (int)strlen(hmac_str);
}
if (fko_new(&ctx) != FKO_SUCCESS)
return _("Could not get new FKO context");
if (MESS_TYPE.CmpNoCase(wxT("Server Command")) == 0)
{
message_type = FKO_COMMAND_MSG;
if (fko_set_spa_message_type(ctx, message_type) != FKO_SUCCESS)
return _("Could not set message type");
snprintf(spa_msg, 256, "%s,%s", (const char*)this->ACCESS_IP.mb_str(wxConvUTF8), (const char*)this->SERVER_CMD.mb_str(wxConvUTF8));
res = fko_set_spa_message(ctx, spa_msg);
if (res != FKO_SUCCESS)
return _("Could not set command message");
} else {
if (fko_set_spa_client_timeout(ctx, wxAtoi(this->SERVER_TIMEOUT)) != FKO_SUCCESS)
return _("Could not set SPA timeout");
snprintf(spa_msg, 256, "%s,%s", (const char*)this->ACCESS_IP.mb_str(wxConvUTF8), (const char*)this->PORTS.mb_str(wxConvUTF8));
if (fko_set_spa_message(ctx, spa_msg) != FKO_SUCCESS)
return _("Could not set SPA Message");
}
if (this->LEGACY) { // technically should trim hmac keys
if (fko_set_spa_encryption_mode(ctx, FKO_ENC_MODE_CBC_LEGACY_IV) != FKO_SUCCESS)
return _("Could not set Legacy mode.");
}
if (!this->HMAC.IsEmpty()){
if (this->HMAC_TYPE.CmpNoCase(wxT("MD5"))==0)
hmac_type = FKO_HMAC_MD5;
else if (this->HMAC_TYPE.CmpNoCase(wxT("SHA1"))==0)
hmac_type = FKO_HMAC_SHA1;
else if (this->HMAC_TYPE.CmpNoCase(wxT("SHA256"))==0)
hmac_type = FKO_HMAC_SHA256;
else if (this->HMAC_TYPE.CmpNoCase(wxT("SHA384"))==0)
hmac_type = FKO_HMAC_SHA384;
else if (this->HMAC_TYPE.CmpNoCase(wxT("SHA512"))==0)
hmac_type = FKO_HMAC_SHA512;
if (fko_set_spa_hmac_type(ctx, hmac_type) != FKO_SUCCESS)
return _("Could not set HMAC type.");
}
if (this->MESS_TYPE.CmpNoCase(wxT("Nat Access")) == 0)
{
sprintf(nat_access_str, "%s,%s", (const char*)this->NAT_IP.mb_str(wxConvUTF8), (const char*)this->NAT_PORT.mb_str(wxConvUTF8));
if (fko_set_spa_nat_access(ctx, nat_access_str) != FKO_SUCCESS)
return _("Could not set nat access string.");
} else if (this->MESS_TYPE.CmpNoCase(wxT("Local Nat Access")) == 0) {
message_type = FKO_CLIENT_TIMEOUT_LOCAL_NAT_ACCESS_MSG;
if (fko_set_spa_message_type(ctx, message_type) != FKO_SUCCESS)
return _("Chould not set message type");
sprintf(nat_access_str, "%s,%s", (const char*)this->SERVER_IP.mb_str(wxConvUTF8), (const char*)this->NAT_PORT.mb_str(wxConvUTF8));
if (fko_set_spa_nat_access(ctx, nat_access_str) != FKO_SUCCESS)
return _("Could not set nat access string.");
}
if (this->DIGEST_TYPE.CmpNoCase(wxT("MD5"))==0)
digest_type = FKO_DIGEST_MD5;
else if (this->DIGEST_TYPE.CmpNoCase(wxT("SHA1"))==0)
digest_type = FKO_DIGEST_SHA1;
else if (this->DIGEST_TYPE.CmpNoCase(wxT("SHA256"))==0)
digest_type = FKO_DIGEST_SHA256;
else if (this->DIGEST_TYPE.CmpNoCase(wxT("SHA384"))==0)
digest_type = FKO_DIGEST_SHA384;
else if (this->DIGEST_TYPE.CmpNoCase(wxT("SHA512"))==0)
digest_type = FKO_DIGEST_SHA512;
if (fko_set_spa_digest_type(ctx, digest_type) != FKO_SUCCESS)
return _("Could not set SPA digest type.");
if (fko_spa_data_final(ctx, key_str, key_len, hmac_str, hmac_str_len) != FKO_SUCCESS)
return _("Could not generate SPA data.");
if (fko_get_spa_data(ctx, &opts.spa_data) != FKO_SUCCESS)
return _("Could not retrieve SPA data.");
//dump_ctx_to_buffer(ctx, debug_buf, sizeof(debug_buf));
this->SPA_STRING = wxString::FromUTF8(opts.spa_data);
return _("Success");
}
