static SQRESULT sq_ssl_get_session_id(HSQUIRRELVM v){
SQ_FUNC_VARS_NO_TOP(v);
GET_ssl_INSTANCE();
const uint8_t * result = ssl_get_session_id(self);
sq_pushstring(v, (char *)result, ssl_get_session_id_size(self));
return 1;
}
/*----------------------------------------------------------------------
| NPT_TlsSessionImpl::GetSessionId
+---------------------------------------------------------------------*/
NPT_Result
NPT_TlsSessionImpl::GetSessionId(NPT_DataBuffer& session_id)
{
if (m_SSL == NULL) {
// no handshake done
session_id.SetDataSize(0);
return NPT_ERROR_INVALID_STATE;
}
// return the session id
session_id.SetData(ssl_get_session_id(m_SSL),
ssl_get_session_id_size(m_SSL));
return NPT_SUCCESS;
}
/**
* Display what session id we have.
*/
static void display_session_id(SSL *ssl)
{
int i;
const uint8_t *session_id = ssl_get_session_id(ssl);
int sess_id_size = ssl_get_session_id_size(ssl);
if (sess_id_size > 0) {
printf("-----BEGIN SSL SESSION PARAMETERS-----\n");
for (i = 0; i < sess_id_size; i++) {
printf("%02x", session_id[i]);
}
printf("\n-----END SSL SESSION PARAMETERS-----\n");
}
}
/*
* This function is called after the TCP connect has completed. Setup the TLS
* layer and do all necessary magic.
*/
CURLcode
Curl_axtls_connect(struct connectdata *conn,
int sockindex)
{
struct SessionHandle *data = conn->data;
SSL_CTX *ssl_ctx;
SSL *ssl;
int cert_types[] = {SSL_OBJ_X509_CERT, SSL_OBJ_PKCS12, 0};
int key_types[] = {SSL_OBJ_RSA_KEY, SSL_OBJ_PKCS8, SSL_OBJ_PKCS12, 0};
int i, ssl_fcn_return;
const uint8_t *ssl_sessionid;
size_t ssl_idsize;
const char *peer_CN;
uint32_t dns_altname_index;
const char *dns_altname;
int8_t found_subject_alt_names = 0;
int8_t found_subject_alt_name_matching_conn = 0;
/* Assuming users will not compile in custom key/cert to axTLS */
uint32_t client_option = SSL_NO_DEFAULT_KEY|SSL_SERVER_VERIFY_LATER;
if(conn->ssl[sockindex].state == ssl_connection_complete)
/* to make us tolerant against being called more than once for the
same connection */
return CURLE_OK;
/* axTLS only supports TLSv1 */
/* check to see if we've been told to use an explicit SSL/TLS version */
switch(data->set.ssl.version) {
case CURL_SSLVERSION_DEFAULT:
case CURL_SSLVERSION_TLSv1:
break;
default:
failf(data, "axTLS only supports TLSv1");
return CURLE_SSL_CONNECT_ERROR;
}
#ifdef AXTLSDEBUG
client_option |= SSL_DISPLAY_STATES | SSL_DISPLAY_RSA | SSL_DISPLAY_CERTS;
#endif /* AXTLSDEBUG */
/* Allocate an SSL_CTX struct */
ssl_ctx = ssl_ctx_new(client_option, SSL_DEFAULT_CLNT_SESS);
if(ssl_ctx == NULL) {
failf(data, "unable to create client SSL context");
return CURLE_SSL_CONNECT_ERROR;
}
/* Load the trusted CA cert bundle file */
if(data->set.ssl.CAfile) {
if(ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CACERT, data->set.ssl.CAfile, NULL)
!= SSL_OK) {
infof(data, "error reading ca cert file %s \n",
data->set.ssl.CAfile);
if(data->set.ssl.verifypeer) {
Curl_axtls_close(conn, sockindex);
return CURLE_SSL_CACERT_BADFILE;
}
}
else
infof(data, "found certificates in %s\n", data->set.ssl.CAfile);
}
/* curl_gtls.c tasks we're skipping for now:
* 1) certificate revocation list checking
* 2) dns name assignment to host
* 3) set protocol priority. axTLS is TLSv1 only, so can probably ignore
* 4) set certificate priority. axTLS ignores type and sends certs in
* order added. can probably ignore this.
*/
/* Load client certificate */
if(data->set.str[STRING_CERT]) {
i=0;
/* Instead of trying to analyze cert type here, let axTLS try them all. */
while(cert_types[i] != 0) {
ssl_fcn_return = ssl_obj_load(ssl_ctx, cert_types[i],
data->set.str[STRING_CERT], NULL);
if(ssl_fcn_return == SSL_OK) {
infof(data, "successfully read cert file %s \n",
data->set.str[STRING_CERT]);
break;
}
i++;
}
/* Tried all cert types, none worked. */
if(cert_types[i] == 0) {
failf(data, "%s is not x509 or pkcs12 format",
data->set.str[STRING_CERT]);
Curl_axtls_close(conn, sockindex);
return CURLE_SSL_CERTPROBLEM;
}
}
/* Load client key.
If a pkcs12 file successfully loaded a cert, then there's nothing to do
because the key has already been loaded. */
if(data->set.str[STRING_KEY] && cert_types[i] != SSL_OBJ_PKCS12) {
i=0;
/* Instead of trying to analyze key type here, let axTLS try them all. */
while(key_types[i] != 0) {
ssl_fcn_return = ssl_obj_load(ssl_ctx, key_types[i],
data->set.str[STRING_KEY], NULL);
if(ssl_fcn_return == SSL_OK) {
infof(data, "successfully read key file %s \n",
data->set.str[STRING_KEY]);
break;
}
i++;
}
/* Tried all key types, none worked. */
if(key_types[i] == 0) {
failf(data, "Failure: %s is not a supported key file",
data->set.str[STRING_KEY]);
Curl_axtls_close(conn, sockindex);
return CURLE_SSL_CONNECT_ERROR;
}
}
/* curl_gtls.c does more here that is being left out for now
* 1) set session credentials. can probably ignore since axtls puts this
* info in the ssl_ctx struct
* 2) setting up callbacks. these seem gnutls specific
*/
/* In axTLS, handshaking happens inside ssl_client_new. */
if(!Curl_ssl_getsessionid(conn, (void **) &ssl_sessionid, &ssl_idsize)) {
/* we got a session id, use it! */
infof (data, "SSL re-using session ID\n");
ssl = ssl_client_new(ssl_ctx, conn->sock[sockindex],
ssl_sessionid, (uint8_t)ssl_idsize);
}
else
ssl = ssl_client_new(ssl_ctx, conn->sock[sockindex], NULL, 0);
/* Check to make sure handshake was ok. */
ssl_fcn_return = ssl_handshake_status(ssl);
if(ssl_fcn_return != SSL_OK) {
Curl_axtls_close(conn, sockindex);
ssl_display_error(ssl_fcn_return); /* goes to stdout. */
return map_error_to_curl(ssl_fcn_return);
}
infof (data, "handshake completed successfully\n");
/* Here, curl_gtls.c gets the peer certificates and fails out depending on
* settings in "data." axTLS api doesn't have get cert chain fcn, so omit?
*/
/* Verify server's certificate */
if(data->set.ssl.verifypeer) {
if(ssl_verify_cert(ssl) != SSL_OK) {
Curl_axtls_close(conn, sockindex);
failf(data, "server cert verify failed");
return CURLE_SSL_CONNECT_ERROR;
}
}
else
infof(data, "\t server certificate verification SKIPPED\n");
/* Here, curl_gtls.c does issuer verification. axTLS has no straightforward
* equivalent, so omitting for now.*/
/* Here, curl_gtls.c does the following
* 1) x509 hostname checking per RFC2818. axTLS doesn't support this, but
* it seems useful. This is now implemented, by Oscar Koeroo
* 2) checks cert validity based on time. axTLS does this in ssl_verify_cert
* 3) displays a bunch of cert information. axTLS doesn't support most of
* this, but a couple fields are available.
*/
/* There is no (DNS) Altnames count in the version 1.4.8 API. There is a
risk of an inifite loop */
for(dns_altname_index = 0; ; dns_altname_index++) {
dns_altname = ssl_get_cert_subject_alt_dnsname(ssl, dns_altname_index);
if(dns_altname == NULL) {
break;
}
found_subject_alt_names = 1;
infof(data, "\tComparing subject alt name DNS with hostname: %s <-> %s\n",
dns_altname, conn->host.name);
if(Curl_cert_hostcheck(dns_altname, conn->host.name)) {
found_subject_alt_name_matching_conn = 1;
break;
}
}
/* RFC2818 checks */
if(found_subject_alt_names && !found_subject_alt_name_matching_conn) {
/* Break connection ! */
Curl_axtls_close(conn, sockindex);
failf(data, "\tsubjectAltName(s) do not match %s\n", conn->host.dispname);
return CURLE_PEER_FAILED_VERIFICATION;
}
else if(found_subject_alt_names == 0) {
/* Per RFC2818, when no Subject Alt Names were available, examine the peer
CN as a legacy fallback */
peer_CN = ssl_get_cert_dn(ssl, SSL_X509_CERT_COMMON_NAME);
if(peer_CN == NULL) {
/* Similar behaviour to the OpenSSL interface */
Curl_axtls_close(conn, sockindex);
failf(data, "unable to obtain common name from peer certificate");
return CURLE_PEER_FAILED_VERIFICATION;
}
else {
if(!Curl_cert_hostcheck((const char *)peer_CN, conn->host.name)) {
if(data->set.ssl.verifyhost) {
/* Break connection ! */
Curl_axtls_close(conn, sockindex);
failf(data, "\tcommon name \"%s\" does not match \"%s\"\n",
peer_CN, conn->host.dispname);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\tcommon name \"%s\" does not match \"%s\"\n",
peer_CN, conn->host.dispname);
}
}
}
/* General housekeeping */
conn->ssl[sockindex].state = ssl_connection_complete;
conn->ssl[sockindex].ssl = ssl;
conn->ssl[sockindex].ssl_ctx = ssl_ctx;
conn->recv[sockindex] = axtls_recv;
conn->send[sockindex] = axtls_send;
/* Put our freshly minted SSL session in cache */
ssl_idsize = ssl_get_session_id_size(ssl);
ssl_sessionid = ssl_get_session_id(ssl);
if(Curl_ssl_addsessionid(conn, (void *) ssl_sessionid, ssl_idsize)
!= CURLE_OK)
infof (data, "failed to add session to cache\n");
return CURLE_OK;
}
/*
* For both blocking and non-blocking connects, this function finalizes the
* SSL connection.
*/
static CURLcode connect_finish(struct connectdata *conn, int sockindex)
{
struct SessionHandle *data = conn->data;
SSL *ssl = conn->ssl[sockindex].ssl;
const uint8_t *ssl_sessionid;
size_t ssl_idsize;
const char *peer_CN;
uint32_t dns_altname_index;
const char *dns_altname;
int8_t found_subject_alt_names = 0;
int8_t found_subject_alt_name_matching_conn = 0;
/* Here, gtls.c gets the peer certificates and fails out depending on
* settings in "data." axTLS api doesn't have get cert chain fcn, so omit?
*/
/* Verify server's certificate */
if(data->set.ssl.verifypeer) {
if(ssl_verify_cert(ssl) != SSL_OK) {
Curl_axtls_close(conn, sockindex);
failf(data, "server cert verify failed");
return CURLE_PEER_FAILED_VERIFICATION;
}
}
else
infof(data, "\t server certificate verification SKIPPED\n");
/* Here, gtls.c does issuer verification. axTLS has no straightforward
* equivalent, so omitting for now.*/
/* Here, gtls.c does the following
* 1) x509 hostname checking per RFC2818. axTLS doesn't support this, but
* it seems useful. This is now implemented, by Oscar Koeroo
* 2) checks cert validity based on time. axTLS does this in ssl_verify_cert
* 3) displays a bunch of cert information. axTLS doesn't support most of
* this, but a couple fields are available.
*/
/* There is no (DNS) Altnames count in the version 1.4.8 API. There is a
risk of an inifite loop */
for(dns_altname_index = 0; ; dns_altname_index++) {
dns_altname = ssl_get_cert_subject_alt_dnsname(ssl, dns_altname_index);
if(dns_altname == NULL) {
break;
}
found_subject_alt_names = 1;
infof(data, "\tComparing subject alt name DNS with hostname: %s <-> %s\n",
dns_altname, conn->host.name);
if(Curl_cert_hostcheck(dns_altname, conn->host.name)) {
found_subject_alt_name_matching_conn = 1;
break;
}
}
/* RFC2818 checks */
if(found_subject_alt_names && !found_subject_alt_name_matching_conn) {
if(data->set.ssl.verifyhost) {
/* Break connection ! */
Curl_axtls_close(conn, sockindex);
failf(data, "\tsubjectAltName(s) do not match %s\n",
conn->host.dispname);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\tsubjectAltName(s) do not match %s\n",
conn->host.dispname);
}
else if(found_subject_alt_names == 0) {
/* Per RFC2818, when no Subject Alt Names were available, examine the peer
CN as a legacy fallback */
peer_CN = ssl_get_cert_dn(ssl, SSL_X509_CERT_COMMON_NAME);
if(peer_CN == NULL) {
if(data->set.ssl.verifyhost) {
Curl_axtls_close(conn, sockindex);
failf(data, "unable to obtain common name from peer certificate");
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "unable to obtain common name from peer certificate");
}
else {
if(!Curl_cert_hostcheck((const char *)peer_CN, conn->host.name)) {
if(data->set.ssl.verifyhost) {
/* Break connection ! */
Curl_axtls_close(conn, sockindex);
failf(data, "\tcommon name \"%s\" does not match \"%s\"\n",
peer_CN, conn->host.dispname);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\tcommon name \"%s\" does not match \"%s\"\n",
peer_CN, conn->host.dispname);
}
}
}
/* General housekeeping */
conn->ssl[sockindex].state = ssl_connection_complete;
conn->recv[sockindex] = axtls_recv;
conn->send[sockindex] = axtls_send;
/* Put our freshly minted SSL session in cache */
ssl_idsize = ssl_get_session_id_size(ssl);
ssl_sessionid = ssl_get_session_id(ssl);
if(Curl_ssl_addsessionid(conn, (void *) ssl_sessionid, ssl_idsize)
!= CURLE_OK)
infof (data, "failed to add session to cache\n");
return CURLE_OK;
}
/*** get/set session ***/
SSL_SESSION *SSL_get1_session(SSL *ssl)
{
return (SSL_SESSION *)ssl_get_session_id(ssl); /* note: wrong cast */
}
/**
* Implement the SSL client logic.
*/
static void do_client(int argc, char *argv[])
{
#ifdef CONFIG_SSL_ENABLE_CLIENT
int res, i = 2;
uint16_t port = 4433;
uint32_t options = SSL_SERVER_VERIFY_LATER | SSL_DISPLAY_CERTS;
int client_fd;
char *private_key_file = NULL;
struct sockaddr_in client_addr;
struct hostent *hostent;
int reconnect = 0;
uint32_t sin_addr;
SSL_CTX *ssl_ctx;
SSL *ssl = NULL;
int quiet = 0;
int cert_index = 0, ca_cert_index = 0;
int cert_size, ca_cert_size;
char **ca_cert, **cert;
uint8_t session_id[SSL_SESSION_ID_SIZE];
fd_set read_set;
const char *password = NULL;
FD_ZERO(&read_set);
sin_addr = inet_addr("127.0.0.1");
cert_size = ssl_get_config(SSL_MAX_CERT_CFG_OFFSET);
ca_cert_size = ssl_get_config(SSL_MAX_CA_CERT_CFG_OFFSET);
ca_cert = (char **)calloc(1, sizeof(char *)*ca_cert_size);
cert = (char **)calloc(1, sizeof(char *)*cert_size);
while (i < argc) {
if (strcmp(argv[i], "-connect") == 0) {
char *host, *ptr;
if (i >= argc - 1) {
print_client_options(argv[i]);
}
host = argv[++i];
if ((ptr = strchr(host, ':')) == NULL) {
print_client_options(argv[i]);
}
*ptr++ = 0;
port = atoi(ptr);
hostent = gethostbyname(host);
if (hostent == NULL) {
print_client_options(argv[i]);
}
sin_addr = *((uint32_t **)hostent->h_addr_list)[0];
} else if (strcmp(argv[i], "-cert") == 0) {
if (i >= argc - 1 || cert_index >= cert_size) {
print_client_options(argv[i]);
}
cert[cert_index++] = argv[++i];
} else if (strcmp(argv[i], "-key") == 0) {
if (i >= argc - 1) {
print_client_options(argv[i]);
}
private_key_file = argv[++i];
options |= SSL_NO_DEFAULT_KEY;
} else if (strcmp(argv[i], "-CAfile") == 0) {
if (i >= argc - 1 || ca_cert_index >= ca_cert_size) {
print_client_options(argv[i]);
}
ca_cert[ca_cert_index++] = argv[++i];
} else if (strcmp(argv[i], "-verify") == 0) {
options &= ~SSL_SERVER_VERIFY_LATER;
} else if (strcmp(argv[i], "-reconnect") == 0) {
reconnect = 4;
} else if (strcmp(argv[i], "-quiet") == 0) {
quiet = 1;
options &= ~SSL_DISPLAY_CERTS;
} else if (strcmp(argv[i], "-pass") == 0) {
if (i >= argc - 1) {
print_client_options(argv[i]);
}
password = argv[++i];
}
#ifdef CONFIG_SSL_FULL_MODE
else if (strcmp(argv[i], "-debug") == 0) {
options |= SSL_DISPLAY_BYTES;
} else if (strcmp(argv[i], "-state") == 0) {
options |= SSL_DISPLAY_STATES;
} else if (strcmp(argv[i], "-show-rsa") == 0) {
options |= SSL_DISPLAY_RSA;
}
#endif
else {
/* don't know what this is */
print_client_options(argv[i]);
}
i++;
}
if ((ssl_ctx = ssl_ctx_new(options, SSL_DEFAULT_CLNT_SESS)) == NULL) {
fprintf(stderr, "Error: Client context is invalid\n");
exit(1);
}
if (private_key_file) {
int obj_type = SSL_OBJ_RSA_KEY;
/* auto-detect the key type from the file extension */
if (strstr(private_key_file, ".p8")) {
obj_type = SSL_OBJ_PKCS8;
} else if (strstr(private_key_file, ".p12")) {
obj_type = SSL_OBJ_PKCS12;
}
if (ssl_obj_load(ssl_ctx, obj_type, private_key_file, password)) {
fprintf(stderr, "Error: Private key '%s' is undefined.\n",
private_key_file);
exit(1);
}
}
for (i = 0; i < cert_index; i++) {
if (ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CERT, cert[i], NULL)) {
printf("Certificate '%s' is undefined.\n", cert[i]);
exit(1);
}
}
for (i = 0; i < ca_cert_index; i++) {
if (ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CACERT, ca_cert[i], NULL)) {
printf("Certificate '%s' is undefined.\n", ca_cert[i]);
exit(1);
}
}
free(cert);
free(ca_cert);
/*************************************************************************
* This is where the interesting stuff happens. Up until now we've
* just been setting up sockets etc. Now we do the SSL handshake.
*************************************************************************/
client_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
memset(&client_addr, 0, sizeof(client_addr));
client_addr.sin_family = AF_INET;
client_addr.sin_port = htons(port);
client_addr.sin_addr.s_addr = sin_addr;
if (connect(client_fd, (struct sockaddr *)&client_addr,
sizeof(client_addr)) < 0) {
perror("connect");
exit(1);
}
if (!quiet) {
printf("CONNECTED\n");
TTY_FLUSH();
}
/* Try session resumption? */
if (reconnect) {
while (reconnect--) {
ssl = ssl_client_new(ssl_ctx, client_fd, session_id,
sizeof(session_id));
if ((res = ssl_handshake_status(ssl)) != SSL_OK) {
if (!quiet) {
ssl_display_error(res);
}
ssl_free(ssl);
exit(1);
}
display_session_id(ssl);
memcpy(session_id, ssl_get_session_id(ssl), SSL_SESSION_ID_SIZE);
if (reconnect) {
ssl_free(ssl);
SOCKET_CLOSE(client_fd);
client_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
connect(client_fd, (struct sockaddr *)&client_addr,
sizeof(client_addr));
}
}
} else {
ssl = ssl_client_new(ssl_ctx, client_fd, NULL, 0);
}
/* check the return status */
if ((res = ssl_handshake_status(ssl)) != SSL_OK) {
if (!quiet) {
ssl_display_error(res);
}
exit(1);
}
if (!quiet) {
const char *common_name = ssl_get_cert_dn(ssl,
SSL_X509_CERT_COMMON_NAME);
if (common_name) {
printf("Common Name:\t\t\t%s\n", common_name);
}
display_session_id(ssl);
display_cipher(ssl);
}
for (;;) {
uint8_t buf[1024];
/* allow parallel reading of server and standard input */
FD_SET(client_fd, &read_set);
#ifndef WIN32
/* win32 doesn't like mixing up stdin and sockets */
FD_SET(STDIN_FILENO, &read_set);
if ((res = select(client_fd + 1, &read_set, NULL, NULL, NULL)) > 0) {
/* read standard input? */
if (FD_ISSET(STDIN_FILENO, &read_set))
#endif
{
if (fgets((char *)buf, sizeof(buf), stdin) == NULL) {
/* bomb out of here */
ssl_free(ssl);
break;
} else {
/* small hack to check renegotiation */
if (buf[0] == 'R' && (buf[1] == '\n' || buf[1] == '\r')) {
res = ssl_renegotiate(ssl);
} else {
res = ssl_write(ssl, buf, strlen((char *)buf));
}
}
}
#ifndef WIN32
else { /* a socket read */
uint8_t *read_buf;
res = ssl_read(ssl, &read_buf);
if (res > 0) { /* display our interesting output */
int written = 0;
while (written < res) {
written += write(STDOUT_FILENO, read_buf + written,
res - written);
}
TTY_FLUSH();
}
}
}
#endif
if (res < 0) {
if (!quiet) {
ssl_display_error(res);
}
break; /* get outta here */
}
}
ssl_ctx_free(ssl_ctx);
SOCKET_CLOSE(client_fd);
#else
print_client_options(argv[1]);
#endif
}
