+#ifdef USE_POLARSSL
+/*
+ * PolarSSL interface
+ */
+
+#include <polarssl/havege.h>
+#include <polarssl/certs.h>
+#include <polarssl/x509.h>
+#include <polarssl/ssl.h>
+#include <polarssl/net.h>
+
+#define CA_CRT_FILENAME "ca.crt"
+
+int ciphers[] =
+{
+ SSL_EDH_RSA_AES_256_SHA,
+ SSL_EDH_RSA_CAMELLIA_256_SHA,
+ SSL_EDH_RSA_DES_168_SHA,
+ SSL_RSA_AES_256_SHA,
+ SSL_RSA_CAMELLIA_256_SHA,
+ SSL_RSA_AES_128_SHA,
+ SSL_RSA_CAMELLIA_128_SHA,
+ SSL_RSA_DES_168_SHA,
+ SSL_RSA_RC4_128_SHA,
+ SSL_RSA_RC4_128_MD5,
+ 0
+};
+static x509_cert certificate;
+static rsa_context key;
+havege_state hs; /* exported to crypt.c */
+
+/* DH prime */
+char *my_dhm_P =
+ "9CE85640903BF123906947FEDE767261" \
+ "D9B4A973EB8F7D984A8C656E2BCC161C" \
+ "183D4CA471BA78225F940F16D1D99CA3" \
+ "E66152CC68EDCE1311A390F307741835" \
+ "44FF6AB553EC7073AD0CB608F2A3B480" \
+ "19E6C02BCED40BD30E91BB2469089670" \
+ "DEF409C08E8AC24D1732A6128D2220DC53";
+char *my_dhm_G = "4";
+
+static void initCert()
+{
+ int rc;
+ char *crtfile = (char *)getStrConf(CERTIFICATE);
+ char *ca_file, *p;
+
+ if (crtfile == NULL)
+ Log_fatal("No certificate file specified");
+ rc = x509parse_crtfile(&certificate, crtfile);
+ if (rc != 0)
+ Log_fatal("Could not read certificate file %s", crtfile);
+
+ /* Look for CA certificate file in same dir */
+ ca_file = malloc(strlen(crtfile) + strlen(CA_CRT_FILENAME) + 1);
+ strcpy(ca_file, crtfile);
+ p = strrchr(ca_file, '/');
+ if (p != NULL)
+ strcpy(p + 1, CA_CRT_FILENAME);
+ else
+ strcpy(ca_file, CA_CRT_FILENAME);
+
+ rc = x509parse_crtfile(&certificate, ca_file);
+ if (rc != 0) { /* No CA certifiacte found. Assume self-signed. */
+ Log_info("CA certificate file %s not found. Assuming self-signed certificate.", ca_file);
+ /*
+ * Apparently PolarSSL needs to read something more into certificate chain.
+ * Doesn't seem to matter what. Read own certificate again.
+ */
+ rc = x509parse_crtfile(&certificate, crtfile);
+ if (rc != 0)
+ Log_fatal("Could not read certificate file %s", crtfile);
+ }
+}
+
+static void initKey()
+{
+ int rc;
+ char *keyfile = (char *)getStrConf(KEY);
+
+ if (keyfile == NULL)
+ Log_fatal("No key file specified");
+ rc = x509parse_keyfile(&key, keyfile, NULL);
+ if (rc != 0)
+ Log_fatal("Could not read RSA key file %s", keyfile);
+}
+
+#define DEBUG_LEVEL 0
+static void pssl_debug(void *ctx, int level, char *str)
+{
+ if (level <= DEBUG_LEVEL)
+ Log_debug("PolarSSL [level %d]: %s", level, str);
+}
+
+void SSLi_init(void)
+{
+ initCert();
+ initKey();
+ havege_init(&hs);
+ Log_info("PolarSSL library initialized");
+}
+
+void SSLi_deinit(void)
+{
+ x509_free(&certificate);
+ rsa_free(&key);
+}
+
+SSL_handle_t *SSLi_newconnection(int *fd, bool_t *SSLready)
+{
+ ssl_context *ssl;
+ ssl_session *ssn;
+ int rc;
+
+ ssl = malloc(sizeof(ssl_context));
+ ssn = malloc(sizeof(ssl_session));
+ if (!ssl || !ssn)
+ Log_fatal("Out of memory");
+ memset(ssl, 0, sizeof(ssl_context));
+ memset(ssn, 0, sizeof(ssl_session));
+
+ rc = ssl_init(ssl);
+ if (rc != 0 )
+ Log_fatal("Failed to initalize: %d", rc);
+
+ ssl_set_endpoint(ssl, SSL_IS_SERVER);
+ ssl_set_authmode(ssl, SSL_VERIFY_OPTIONAL);
+
+ ssl_set_rng(ssl, havege_rand, &hs);
+ ssl_set_dbg(ssl, pssl_debug, NULL);
+ ssl_set_bio(ssl, net_recv, fd, net_send, fd);
+
+ ssl_set_ciphers(ssl, ciphers);
+ ssl_set_session(ssl, 0, 0, ssn);
+
+ ssl_set_ca_chain(ssl, certificate.next, NULL, NULL);
+ ssl_set_own_cert(ssl, &certificate, &key);
+ ssl_set_dh_param(ssl, my_dhm_P, my_dhm_G);
+
+ return ssl;
+}
+
+int SSLi_nonblockaccept(SSL_handle_t *ssl, bool_t *SSLready)
+{
+ int rc;
+
+ rc = ssl_handshake(ssl);
+ if (rc != 0) {
+ if (rc == POLARSSL_ERR_NET_TRY_AGAIN) {
+ return 0;
+ } else {
+ Log_warn("SSL handshake failed: %d", rc);
+ return -1;
+ }
+ }
+ *SSLready = true;
+ return 0;
+}
+
+int SSLi_read(SSL_handle_t *ssl, uint8_t *buf, int len)
+{
+ int rc;
+ rc = ssl_read(ssl, buf, len);
+ if (rc == POLARSSL_ERR_NET_TRY_AGAIN)
+ return SSLI_ERROR_WANT_READ;
+ return rc;
+}
+
+int SSLi_write(SSL_handle_t *ssl, uint8_t *buf, int len)
+{
+ int rc;
+ rc = ssl_write(ssl, buf, len);
+ if (rc == POLARSSL_ERR_NET_TRY_AGAIN)
+ return SSLI_ERROR_WANT_WRITE;
+ return rc;
+}
+
+int SSLi_get_error(SSL_handle_t *ssl, int code)
+{
+ return code;
+}
+
+bool_t SSLi_data_pending(SSL_handle_t *ssl)
+{
+ return ssl_get_bytes_avail(ssl) > 0;
+}
+
+void SSLi_shutdown(SSL_handle_t *ssl)
+{
+ ssl_close_notify(ssl);
+}
+
+void SSLi_free(SSL_handle_t *ssl)
+{
+ free(ssl->session);
+ free(ssl);
+}
+
+#else
+/*
+ * OpenSSL interface
+ */
+
+#include <openssl/x509v3.h>
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+#include <openssl/safestack.h>