diff options
Diffstat (limited to 'Utilities/cmcurl/lib/vtls/axtls.c')
| -rw-r--r-- | Utilities/cmcurl/lib/vtls/axtls.c | 741 |
1 files changed, 741 insertions, 0 deletions
diff --git a/Utilities/cmcurl/lib/vtls/axtls.c b/Utilities/cmcurl/lib/vtls/axtls.c new file mode 100644 index 0000000..b262392 --- /dev/null +++ b/Utilities/cmcurl/lib/vtls/axtls.c @@ -0,0 +1,741 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 2010, DirecTV, Contact: Eric Hu, <ehu@directv.com>. + * Copyright (C) 2010 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al. + * + * This software is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at https://curl.haxx.se/docs/copyright.html. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the COPYING file. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ***************************************************************************/ + +/* + * Source file for all axTLS-specific code for the TLS/SSL layer. No code + * but vtls.c should ever call or use these functions. + */ + +#include "curl_setup.h" + +#ifdef USE_AXTLS + +#error axTLS support has been disabled in curl due to doubts about quality, +#error user dedication and a lack of use/testing. We urge users to consider +#error using a more established TLS backend instead. + +#include <axTLS/config.h> +#include <axTLS/ssl.h> +#include "axtls.h" + +#include "sendf.h" +#include "inet_pton.h" +#include "vtls.h" +#include "parsedate.h" +#include "connect.h" /* for the connect timeout */ +#include "select.h" +#include "curl_printf.h" +#include "hostcheck.h" +#include <unistd.h> + +/* The last #include files should be: */ +#include "curl_memory.h" +#include "memdebug.h" + +struct ssl_backend_data { + SSL_CTX* ssl_ctx; + SSL* ssl; +}; + +#define BACKEND connssl->backend + +static CURLcode map_error_to_curl(int axtls_err) +{ + switch(axtls_err) { + case SSL_ERROR_NOT_SUPPORTED: + case SSL_ERROR_INVALID_VERSION: + case -70: /* protocol version alert from server */ + return CURLE_UNSUPPORTED_PROTOCOL; + break; + case SSL_ERROR_NO_CIPHER: + return CURLE_SSL_CIPHER; + break; + case SSL_ERROR_BAD_CERTIFICATE: /* this may be bad server cert too */ + case SSL_ERROR_NO_CERT_DEFINED: + case -42: /* bad certificate alert from server */ + case -43: /* unsupported cert alert from server */ + case -44: /* cert revoked alert from server */ + case -45: /* cert expired alert from server */ + case -46: /* cert unknown alert from server */ + return CURLE_SSL_CERTPROBLEM; + break; + case SSL_X509_ERROR(X509_NOT_OK): + case SSL_X509_ERROR(X509_VFY_ERROR_NO_TRUSTED_CERT): + case SSL_X509_ERROR(X509_VFY_ERROR_BAD_SIGNATURE): + case SSL_X509_ERROR(X509_VFY_ERROR_NOT_YET_VALID): + case SSL_X509_ERROR(X509_VFY_ERROR_EXPIRED): + case SSL_X509_ERROR(X509_VFY_ERROR_SELF_SIGNED): + case SSL_X509_ERROR(X509_VFY_ERROR_INVALID_CHAIN): + case SSL_X509_ERROR(X509_VFY_ERROR_UNSUPPORTED_DIGEST): + case SSL_X509_ERROR(X509_INVALID_PRIV_KEY): + return CURLE_PEER_FAILED_VERIFICATION; + break; + case -48: /* unknown ca alert from server */ + return CURLE_SSL_CACERT; + break; + case -49: /* access denied alert from server */ + return CURLE_REMOTE_ACCESS_DENIED; + break; + case SSL_ERROR_CONN_LOST: + case SSL_ERROR_SOCK_SETUP_FAILURE: + case SSL_ERROR_INVALID_HANDSHAKE: + case SSL_ERROR_INVALID_PROT_MSG: + case SSL_ERROR_INVALID_HMAC: + case SSL_ERROR_INVALID_SESSION: + case SSL_ERROR_INVALID_KEY: /* it's too bad this doesn't map better */ + case SSL_ERROR_FINISHED_INVALID: + case SSL_ERROR_NO_CLIENT_RENOG: + default: + return CURLE_SSL_CONNECT_ERROR; + break; + } +} + +static Curl_recv axtls_recv; +static Curl_send axtls_send; + +static void free_ssl_structs(struct ssl_connect_data *connssl) +{ + if(BACKEND->ssl) { + ssl_free(BACKEND->ssl); + BACKEND->ssl = NULL; + } + if(BACKEND->ssl_ctx) { + ssl_ctx_free(BACKEND->ssl_ctx); + BACKEND->ssl_ctx = NULL; + } +} + +/* + * For both blocking and non-blocking connects, this function sets up the + * ssl context and state. This function is called after the TCP connect + * has completed. + */ +static CURLcode connect_prep(struct connectdata *conn, int sockindex) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct Curl_easy *data = conn->data; + SSL_CTX *ssl_ctx; + SSL *ssl = NULL; + 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; + + /* Assuming users will not compile in custom key/cert to axTLS. + * Also, even for blocking connects, use axTLS non-blocking feature. + */ + uint32_t client_option = SSL_NO_DEFAULT_KEY | + SSL_SERVER_VERIFY_LATER | + SSL_CONNECT_IN_PARTS; + + if(connssl->state == ssl_connection_complete) + /* to make us tolerant against being called more than once for the + same connection */ + return CURLE_OK; + + if(SSL_CONN_CONFIG(version_max) != CURL_SSLVERSION_MAX_NONE) { + failf(data, "axtls does not support CURL_SSLVERSION_MAX"); + return CURLE_SSL_CONNECT_ERROR; + } + + + /* axTLS only supports TLSv1 */ + /* check to see if we've been told to use an explicit SSL/TLS version */ + switch(SSL_CONN_CONFIG(version)) { + case CURL_SSLVERSION_DEFAULT: + case CURL_SSLVERSION_TLSv1: + break; + default: + failf(data, "axTLS only supports TLS 1.0 and 1.1, " + "and it cannot be specified which one to use"); + 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; + } + + BACKEND->ssl_ctx = ssl_ctx; + BACKEND->ssl = NULL; + + /* Load the trusted CA cert bundle file */ + if(SSL_CONN_CONFIG(CAfile)) { + if(ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CACERT, + SSL_CONN_CONFIG(CAfile), NULL) != SSL_OK) { + infof(data, "error reading ca cert file %s \n", + SSL_CONN_CONFIG(CAfile)); + if(SSL_CONN_CONFIG(verifypeer)) { + return CURLE_SSL_CACERT_BADFILE; + } + } + else + infof(data, "found certificates in %s\n", SSL_CONN_CONFIG(CAfile)); + } + + /* 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(SSL_SET_OPTION(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], + SSL_SET_OPTION(cert), NULL); + if(ssl_fcn_return == SSL_OK) { + infof(data, "successfully read cert file %s \n", + SSL_SET_OPTION(cert)); + break; + } + i++; + } + /* Tried all cert types, none worked. */ + if(cert_types[i] == 0) { + failf(data, "%s is not x509 or pkcs12 format", + SSL_SET_OPTION(cert)); + 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(SSL_SET_OPTION(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], + SSL_SET_OPTION(key), NULL); + if(ssl_fcn_return == SSL_OK) { + infof(data, "successfully read key file %s \n", + SSL_SET_OPTION(key)); + break; + } + i++; + } + /* Tried all key types, none worked. */ + if(key_types[i] == 0) { + failf(data, "Failure: %s is not a supported key file", + SSL_SET_OPTION(key)); + return CURLE_SSL_CONNECT_ERROR; + } + } + + /* 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 + */ + + if(SSL_SET_OPTION(primary.sessionid)) { + const uint8_t *ssl_sessionid; + size_t ssl_idsize; + + /* In axTLS, handshaking happens inside ssl_client_new. */ + Curl_ssl_sessionid_lock(conn); + if(!Curl_ssl_getsessionid(conn, (void **) &ssl_sessionid, &ssl_idsize, + sockindex)) { + /* 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, NULL); + } + Curl_ssl_sessionid_unlock(conn); + } + + if(!ssl) + ssl = ssl_client_new(ssl_ctx, conn->sock[sockindex], NULL, 0, NULL); + + BACKEND->ssl = ssl; + return CURLE_OK; +} + +static void Curl_axtls_close(struct connectdata *conn, int sockindex) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + + infof(conn->data, " Curl_axtls_close\n"); + + /* line from openssl.c: (void)SSL_shutdown(BACKEND->ssl); + axTLS compat layer does nothing for SSL_shutdown */ + + /* The following line is from openssl.c. There seems to be no axTLS + equivalent. ssl_free and ssl_ctx_free close things. + SSL_set_connect_state(connssl->handle); */ + + free_ssl_structs(connssl); +} + +/* + * For both blocking and non-blocking connects, this function finalizes the + * SSL connection. + */ +static CURLcode connect_finish(struct connectdata *conn, int sockindex) +{ + struct Curl_easy *data = conn->data; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + SSL *ssl = BACKEND->ssl; + 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; + const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name : + conn->host.name; + const char * const dispname = SSL_IS_PROXY() ? + conn->http_proxy.host.dispname : conn->host.dispname; + + /* 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(SSL_CONN_CONFIG(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, hostname); + if(Curl_cert_hostcheck(dns_altname, hostname)) { + found_subject_alt_name_matching_conn = 1; + break; + } + } + + /* RFC2818 checks */ + if(found_subject_alt_names && !found_subject_alt_name_matching_conn) { + if(SSL_CONN_CONFIG(verifyhost)) { + /* Break connection ! */ + Curl_axtls_close(conn, sockindex); + failf(data, "\tsubjectAltName(s) do not match %s\n", dispname); + return CURLE_PEER_FAILED_VERIFICATION; + } + else + infof(data, "\tsubjectAltName(s) do not match %s\n", 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(SSL_CONN_CONFIG(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, hostname)) { + if(SSL_CONN_CONFIG(verifyhost)) { + /* Break connection ! */ + Curl_axtls_close(conn, sockindex); + failf(data, "\tcommon name \"%s\" does not match \"%s\"\n", + peer_CN, dispname); + return CURLE_PEER_FAILED_VERIFICATION; + } + else + infof(data, "\tcommon name \"%s\" does not match \"%s\"\n", + peer_CN, dispname); + } + } + } + + /* General housekeeping */ + connssl->state = ssl_connection_complete; + conn->recv[sockindex] = axtls_recv; + conn->send[sockindex] = axtls_send; + + /* Put our freshly minted SSL session in cache */ + if(SSL_SET_OPTION(primary.sessionid)) { + const uint8_t *ssl_sessionid = ssl_get_session_id(ssl); + size_t ssl_idsize = ssl_get_session_id_size(ssl); + Curl_ssl_sessionid_lock(conn); + if(Curl_ssl_addsessionid(conn, (void *) ssl_sessionid, ssl_idsize, + sockindex) != CURLE_OK) + infof(data, "failed to add session to cache\n"); + Curl_ssl_sessionid_unlock(conn); + } + + return CURLE_OK; +} + +/* + * Use axTLS's non-blocking connection feature to open an SSL connection. + * This is called after a TCP connection is already established. + */ +static CURLcode Curl_axtls_connect_nonblocking(struct connectdata *conn, + int sockindex, bool *done) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + CURLcode conn_step; + int ssl_fcn_return; + int i; + + *done = FALSE; + /* connectdata is calloc'd and connecting_state is only changed in this + function, so this is safe, as the state is effectively initialized. */ + if(connssl->connecting_state == ssl_connect_1) { + conn_step = connect_prep(conn, sockindex); + if(conn_step != CURLE_OK) { + Curl_axtls_close(conn, sockindex); + return conn_step; + } + connssl->connecting_state = ssl_connect_2; + } + + if(connssl->connecting_state == ssl_connect_2) { + /* Check to make sure handshake was ok. */ + if(ssl_handshake_status(BACKEND->ssl) != SSL_OK) { + /* Loop to perform more work in between sleeps. This is work around the + fact that axtls does not expose any knowledge about when work needs + to be performed. This can save ~25% of time on SSL handshakes. */ + for(i = 0; i<5; i++) { + ssl_fcn_return = ssl_read(BACKEND->ssl, NULL); + if(ssl_fcn_return < 0) { + Curl_axtls_close(conn, sockindex); + ssl_display_error(ssl_fcn_return); /* goes to stdout. */ + return map_error_to_curl(ssl_fcn_return); + } + return CURLE_OK; + } + } + infof(conn->data, "handshake completed successfully\n"); + connssl->connecting_state = ssl_connect_3; + } + + if(connssl->connecting_state == ssl_connect_3) { + conn_step = connect_finish(conn, sockindex); + if(conn_step != CURLE_OK) { + Curl_axtls_close(conn, sockindex); + return conn_step; + } + + /* Reset connect state */ + connssl->connecting_state = ssl_connect_1; + + *done = TRUE; + return CURLE_OK; + } + + /* Unrecognized state. Things are very bad. */ + connssl->state = ssl_connection_none; + connssl->connecting_state = ssl_connect_1; + /* Return value perhaps not strictly correct, but distinguishes the issue.*/ + return CURLE_BAD_FUNCTION_ARGUMENT; +} + + +/* + * This function is called after the TCP connect has completed. Setup the TLS + * layer and do all necessary magic for a blocking connect. + */ +static CURLcode Curl_axtls_connect(struct connectdata *conn, int sockindex) +{ + struct Curl_easy *data = conn->data; + CURLcode conn_step = connect_prep(conn, sockindex); + int ssl_fcn_return; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + SSL *ssl = BACKEND->ssl; + long timeout_ms; + + if(conn_step != CURLE_OK) { + Curl_axtls_close(conn, sockindex); + return conn_step; + } + + /* Check to make sure handshake was ok. */ + while(ssl_handshake_status(ssl) != SSL_OK) { + /* check allowed time left */ + timeout_ms = Curl_timeleft(data, NULL, TRUE); + + if(timeout_ms < 0) { + /* no need to continue if time already is up */ + failf(data, "SSL connection timeout"); + return CURLE_OPERATION_TIMEDOUT; + } + + ssl_fcn_return = ssl_read(ssl, NULL); + if(ssl_fcn_return < 0) { + Curl_axtls_close(conn, sockindex); + ssl_display_error(ssl_fcn_return); /* goes to stdout. */ + return map_error_to_curl(ssl_fcn_return); + } + /* TODO: avoid polling */ + Curl_wait_ms(10); + } + infof(conn->data, "handshake completed successfully\n"); + + conn_step = connect_finish(conn, sockindex); + if(conn_step != CURLE_OK) { + Curl_axtls_close(conn, sockindex); + return conn_step; + } + + return CURLE_OK; +} + +/* return number of sent (non-SSL) bytes */ +static ssize_t axtls_send(struct connectdata *conn, + int sockindex, + const void *mem, + size_t len, + CURLcode *err) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + /* ssl_write() returns 'int' while write() and send() returns 'size_t' */ + int rc = ssl_write(BACKEND->ssl, mem, (int)len); + + infof(conn->data, " axtls_send\n"); + + if(rc < 0) { + *err = map_error_to_curl(rc); + rc = -1; /* generic error code for send failure */ + } + + *err = CURLE_OK; + return rc; +} + +/* + * This function is called to shut down the SSL layer but keep the + * socket open (CCC - Clear Command Channel) + */ +static int Curl_axtls_shutdown(struct connectdata *conn, int sockindex) +{ + /* Outline taken from openssl.c since functions are in axTLS compat layer. + axTLS's error set is much smaller, so a lot of error-handling was removed. + */ + int retval = 0; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct Curl_easy *data = conn->data; + uint8_t *buf; + ssize_t nread; + + infof(conn->data, " Curl_axtls_shutdown\n"); + + /* This has only been tested on the proftpd server, and the mod_tls code + sends a close notify alert without waiting for a close notify alert in + response. Thus we wait for a close notify alert from the server, but + we do not send one. Let's hope other servers do the same... */ + + /* axTLS compat layer does nothing for SSL_shutdown, so we do nothing too + if(data->set.ftp_ccc == CURLFTPSSL_CCC_ACTIVE) + (void)SSL_shutdown(BACKEND->ssl); + */ + + if(BACKEND->ssl) { + int what = SOCKET_READABLE(conn->sock[sockindex], SSL_SHUTDOWN_TIMEOUT); + if(what > 0) { + /* Something to read, let's do it and hope that it is the close + notify alert from the server. buf is managed internally by + axTLS and will be released upon calling ssl_free via + free_ssl_structs. */ + nread = (ssize_t)ssl_read(BACKEND->ssl, &buf); + + if(nread < SSL_OK) { + failf(data, "close notify alert not received during shutdown"); + retval = -1; + } + } + else if(0 == what) { + /* timeout */ + failf(data, "SSL shutdown timeout"); + } + else { + /* anything that gets here is fatally bad */ + failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO); + retval = -1; + } + + free_ssl_structs(connssl); + } + return retval; +} + +static ssize_t axtls_recv(struct connectdata *conn, /* connection data */ + int num, /* socketindex */ + char *buf, /* store read data here */ + size_t buffersize, /* max amount to read */ + CURLcode *err) +{ + struct ssl_connect_data *connssl = &conn->ssl[num]; + ssize_t ret = 0; + uint8_t *read_buf; + + infof(conn->data, " axtls_recv\n"); + + *err = CURLE_OK; + if(connssl) { + ret = ssl_read(BACKEND->ssl, &read_buf); + if(ret > SSL_OK) { + /* ssl_read returns SSL_OK if there is more data to read, so if it is + larger, then all data has been read already. */ + memcpy(buf, read_buf, + (size_t)ret > buffersize ? buffersize : (size_t)ret); + } + else if(ret == SSL_OK) { + /* more data to be read, signal caller to call again */ + *err = CURLE_AGAIN; + ret = -1; + } + else if(ret == -3) { + /* With patched axTLS, SSL_CLOSE_NOTIFY=-3. Hard-coding until axTLS + team approves proposed fix. */ + Curl_axtls_close(conn, num); + } + else { + failf(conn->data, "axTLS recv error (%d)", ret); + *err = map_error_to_curl((int) ret); + ret = -1; + } + } + + return ret; +} + +/* + * Return codes: + * 1 means the connection is still in place + * 0 means the connection has been closed + * -1 means the connection status is unknown + */ +static int Curl_axtls_check_cxn(struct connectdata *conn) +{ + /* openssl.c line: + rc = SSL_peek(conn->ssl[FIRSTSOCKET].backend->ssl, (void*)&buf, 1); + axTLS compat layer always returns the last argument, so connection is + always alive? */ + + infof(conn->data, " Curl_axtls_check_cxn\n"); + return 1; /* connection still in place */ +} + +static void Curl_axtls_session_free(void *ptr) +{ + (void)ptr; + /* free the ID */ + /* both openssl.c and gtls.c do something here, but axTLS's OpenSSL + compatibility layer does nothing, so we do nothing too. */ +} + +static size_t Curl_axtls_version(char *buffer, size_t size) +{ + return snprintf(buffer, size, "axTLS/%s", ssl_version()); +} + +static CURLcode Curl_axtls_random(struct Curl_easy *data, + unsigned char *entropy, size_t length) +{ + static bool ssl_seeded = FALSE; + (void)data; + if(!ssl_seeded) { + ssl_seeded = TRUE; + /* Initialize the seed if not already done. This call is not exactly thread + * safe (and neither is the ssl_seeded check), but the worst effect of a + * race condition is that some global resources will leak. */ + RNG_initialize(); + } + get_random((int)length, entropy); + return CURLE_OK; +} + +static void *Curl_axtls_get_internals(struct ssl_connect_data *connssl, + CURLINFO info UNUSED_PARAM) +{ + (void)info; + return BACKEND->ssl; +} + +const struct Curl_ssl Curl_ssl_axtls = { + { CURLSSLBACKEND_AXTLS, "axtls" }, /* info */ + 0, /* no fancy stuff */ + sizeof(struct ssl_backend_data), + + /* + * axTLS has no global init. Everything is done through SSL and SSL_CTX + * structs stored in connectdata structure. + */ + Curl_none_init, /* init */ + /* axTLS has no global cleanup. */ + Curl_none_cleanup, /* cleanup */ + Curl_axtls_version, /* version */ + Curl_axtls_check_cxn, /* check_cxn */ + Curl_axtls_shutdown, /* shutdown */ + Curl_none_data_pending, /* data_pending */ + Curl_axtls_random, /* random */ + Curl_none_cert_status_request, /* cert_status_request */ + Curl_axtls_connect, /* connect */ + Curl_axtls_connect_nonblocking, /* connect_nonblocking */ + Curl_axtls_get_internals, /* get_internals */ + Curl_axtls_close, /* close_one */ + Curl_none_close_all, /* close_all */ + Curl_axtls_session_free, /* session_free */ + Curl_none_set_engine, /* set_engine */ + Curl_none_set_engine_default, /* set_engine_default */ + Curl_none_engines_list, /* engines_list */ + Curl_none_false_start, /* false_start */ + Curl_none_md5sum, /* md5sum */ + NULL /* sha256sum */ +}; + +#endif /* USE_AXTLS */ |