+
+void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
+ {
+ BIO *bio = arg;
+ const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
+
+ str_write_p = write_p ? ">>>" : "<<<";
+
+ switch (version)
+ {
+ case SSL2_VERSION:
+ str_version = "SSL 2.0";
+ break;
+ case SSL3_VERSION:
+ str_version = "SSL 3.0 ";
+ break;
+ case TLS1_VERSION:
+ str_version = "TLS 1.0 ";
+ break;
+ case TLS1_1_VERSION:
+ str_version = "TLS 1.1 ";
+ break;
+ case TLS1_2_VERSION:
+ str_version = "TLS 1.2 ";
+ break;
+ case DTLS1_VERSION:
+ str_version = "DTLS 1.0 ";
+ break;
+ case DTLS1_BAD_VER:
+ str_version = "DTLS 1.0 (bad) ";
+ break;
+ default:
+ str_version = "???";
+ }
+
+ if (version == SSL2_VERSION)
+ {
+ str_details1 = "???";
+
+ if (len > 0)
+ {
+ switch (((const unsigned char*)buf)[0])
+ {
+ case 0:
+ str_details1 = ", ERROR:";
+ str_details2 = " ???";
+ if (len >= 3)
+ {
+ unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
+
+ switch (err)
+ {
+ case 0x0001:
+ str_details2 = " NO-CIPHER-ERROR";
+ break;
+ case 0x0002:
+ str_details2 = " NO-CERTIFICATE-ERROR";
+ break;
+ case 0x0004:
+ str_details2 = " BAD-CERTIFICATE-ERROR";
+ break;
+ case 0x0006:
+ str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
+ break;
+ }
+ }
+
+ break;
+ case 1:
+ str_details1 = ", CLIENT-HELLO";
+ break;
+ case 2:
+ str_details1 = ", CLIENT-MASTER-KEY";
+ break;
+ case 3:
+ str_details1 = ", CLIENT-FINISHED";
+ break;
+ case 4:
+ str_details1 = ", SERVER-HELLO";
+ break;
+ case 5:
+ str_details1 = ", SERVER-VERIFY";
+ break;
+ case 6:
+ str_details1 = ", SERVER-FINISHED";
+ break;
+ case 7:
+ str_details1 = ", REQUEST-CERTIFICATE";
+ break;
+ case 8:
+ str_details1 = ", CLIENT-CERTIFICATE";
+ break;
+ }
+ }
+ }
+
+ if (version == SSL3_VERSION ||
+ version == TLS1_VERSION ||
+ version == DTLS1_VERSION ||
+ version == DTLS1_BAD_VER)
+ {
+ switch (content_type)
+ {
+ case 20:
+ str_content_type = "ChangeCipherSpec";
+ break;
+ case 21:
+ str_content_type = "Alert";
+ break;
+ case 22:
+ str_content_type = "Handshake";
+ break;
+ }
+
+ if (content_type == 21) /* Alert */
+ {
+ str_details1 = ", ???";
+
+ if (len == 2)
+ {
+ switch (((const unsigned char*)buf)[0])
+ {
+ case 1:
+ str_details1 = ", warning";
+ break;
+ case 2:
+ str_details1 = ", fatal";
+ break;
+ }
+
+ str_details2 = " ???";
+ switch (((const unsigned char*)buf)[1])
+ {
+ case 0:
+ str_details2 = " close_notify";
+ break;
+ case 10:
+ str_details2 = " unexpected_message";
+ break;
+ case 20:
+ str_details2 = " bad_record_mac";
+ break;
+ case 21:
+ str_details2 = " decryption_failed";
+ break;
+ case 22:
+ str_details2 = " record_overflow";
+ break;
+ case 30:
+ str_details2 = " decompression_failure";
+ break;
+ case 40:
+ str_details2 = " handshake_failure";
+ break;
+ case 42:
+ str_details2 = " bad_certificate";
+ break;
+ case 43:
+ str_details2 = " unsupported_certificate";
+ break;
+ case 44:
+ str_details2 = " certificate_revoked";
+ break;
+ case 45:
+ str_details2 = " certificate_expired";
+ break;
+ case 46:
+ str_details2 = " certificate_unknown";
+ break;
+ case 47:
+ str_details2 = " illegal_parameter";
+ break;
+ case 48:
+ str_details2 = " unknown_ca";
+ break;
+ case 49:
+ str_details2 = " access_denied";
+ break;
+ case 50:
+ str_details2 = " decode_error";
+ break;
+ case 51:
+ str_details2 = " decrypt_error";
+ break;
+ case 60:
+ str_details2 = " export_restriction";
+ break;
+ case 70:
+ str_details2 = " protocol_version";
+ break;
+ case 71:
+ str_details2 = " insufficient_security";
+ break;
+ case 80:
+ str_details2 = " internal_error";
+ break;
+ case 90:
+ str_details2 = " user_canceled";
+ break;
+ case 100:
+ str_details2 = " no_renegotiation";
+ break;
+ case 110:
+ str_details2 = " unsupported_extension";
+ break;
+ case 111:
+ str_details2 = " certificate_unobtainable";
+ break;
+ case 112:
+ str_details2 = " unrecognized_name";
+ break;
+ case 113:
+ str_details2 = " bad_certificate_status_response";
+ break;
+ case 114:
+ str_details2 = " bad_certificate_hash_value";
+ break;
+ case 115:
+ str_details2 = " unknown_psk_identity";
+ break;
+ }
+ }
+ }
+
+ if (content_type == 22) /* Handshake */
+ {
+ str_details1 = "???";
+
+ if (len > 0)
+ {
+ switch (((const unsigned char*)buf)[0])
+ {
+ case 0:
+ str_details1 = ", HelloRequest";
+ break;
+ case 1:
+ str_details1 = ", ClientHello";
+ break;
+ case 2:
+ str_details1 = ", ServerHello";
+ break;
+ case 3:
+ str_details1 = ", HelloVerifyRequest";
+ break;
+ case 11:
+ str_details1 = ", Certificate";
+ break;
+ case 12:
+ str_details1 = ", ServerKeyExchange";
+ break;
+ case 13:
+ str_details1 = ", CertificateRequest";
+ break;
+ case 14:
+ str_details1 = ", ServerHelloDone";
+ break;
+ case 15:
+ str_details1 = ", CertificateVerify";
+ break;
+ case 16:
+ str_details1 = ", ClientKeyExchange";
+ break;
+ case 20:
+ str_details1 = ", Finished";
+ break;
+ }
+ }
+ }
+
+#ifndef OPENSSL_NO_HEARTBEATS
+ if (content_type == 24) /* Heartbeat */
+ {
+ str_details1 = ", Heartbeat";
+
+ if (len > 0)
+ {
+ switch (((const unsigned char*)buf)[0])
+ {
+ case 1:
+ str_details1 = ", HeartbeatRequest";
+ break;
+ case 2:
+ str_details1 = ", HeartbeatResponse";
+ break;
+ }
+ }
+ }
+#endif
+ }
+
+ BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version, str_content_type, (unsigned long)len, str_details1, str_details2);
+
+ if (len > 0)
+ {
+ size_t num, i;
+
+ BIO_printf(bio, " ");
+ num = len;
+#if 0
+ if (num > 16)
+ num = 16;
+#endif
+ for (i = 0; i < num; i++)
+ {
+ if (i % 16 == 0 && i > 0)
+ BIO_printf(bio, "\n ");
+ BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
+ }
+ if (i < len)
+ BIO_printf(bio, " ...");
+ BIO_printf(bio, "\n");
+ }
+ (void)BIO_flush(bio);
+ }
+
+void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
+ unsigned char *data, int len,
+ void *arg)
+ {
+ BIO *bio = arg;
+ char *extname;
+
+ switch(type)
+ {
+ case TLSEXT_TYPE_server_name:
+ extname = "server name";
+ break;
+
+ case TLSEXT_TYPE_max_fragment_length:
+ extname = "max fragment length";
+ break;
+
+ case TLSEXT_TYPE_client_certificate_url:
+ extname = "client certificate URL";
+ break;
+
+ case TLSEXT_TYPE_trusted_ca_keys:
+ extname = "trusted CA keys";
+ break;
+
+ case TLSEXT_TYPE_truncated_hmac:
+ extname = "truncated HMAC";
+ break;
+
+ case TLSEXT_TYPE_status_request:
+ extname = "status request";
+ break;
+
+ case TLSEXT_TYPE_user_mapping:
+ extname = "user mapping";
+ break;
+
+ case TLSEXT_TYPE_client_authz:
+ extname = "client authz";
+ break;
+
+ case TLSEXT_TYPE_server_authz:
+ extname = "server authz";
+ break;
+
+ case TLSEXT_TYPE_cert_type:
+ extname = "cert type";
+ break;
+
+ case TLSEXT_TYPE_elliptic_curves:
+ extname = "elliptic curves";
+ break;
+
+ case TLSEXT_TYPE_ec_point_formats:
+ extname = "EC point formats";
+ break;
+
+ case TLSEXT_TYPE_srp:
+ extname = "SRP";
+ break;
+
+ case TLSEXT_TYPE_signature_algorithms:
+ extname = "signature algorithms";
+ break;
+
+ case TLSEXT_TYPE_use_srtp:
+ extname = "use SRTP";
+ break;
+
+ case TLSEXT_TYPE_heartbeat:
+ extname = "heartbeat";
+ break;
+
+ case TLSEXT_TYPE_session_ticket:
+ extname = "session ticket";
+ break;
+
+ case TLSEXT_TYPE_renegotiate:
+ extname = "renegotiation info";
+ break;
+
+#ifdef TLSEXT_TYPE_opaque_prf_input
+ case TLSEXT_TYPE_opaque_prf_input:
+ extname = "opaque PRF input";
+ break;
+#endif
+#ifdef TLSEXT_TYPE_next_proto_neg
+ case TLSEXT_TYPE_next_proto_neg:
+ extname = "next protocol";
+ break;
+#endif
+
+ default:
+ extname = "unknown";
+ break;
+
+ }
+
+ BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
+ client_server ? "server": "client",
+ extname, type, len);
+ BIO_dump(bio, (char *)data, len);
+ (void)BIO_flush(bio);
+ }
+
+int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
+ {
+ unsigned char *buffer, result[EVP_MAX_MD_SIZE];
+ unsigned int length, resultlength;
+ union {
+ struct sockaddr sa;
+ struct sockaddr_in s4;
+#if OPENSSL_USE_IPV6
+ struct sockaddr_in6 s6;
+#endif
+ } peer;
+
+ /* Initialize a random secret */
+ if (!cookie_initialized)
+ {
+ if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
+ {
+ BIO_printf(bio_err,"error setting random cookie secret\n");
+ return 0;
+ }
+ cookie_initialized = 1;
+ }
+
+ /* Read peer information */
+ (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
+
+ /* Create buffer with peer's address and port */
+ length = 0;
+ switch (peer.sa.sa_family)
+ {
+ case AF_INET:
+ length += sizeof(struct in_addr);
+ length += sizeof(peer.s4.sin_port);
+ break;
+#if OPENSSL_USE_IPV6
+ case AF_INET6:
+ length += sizeof(struct in6_addr);
+ length += sizeof(peer.s6.sin6_port);
+ break;
+#endif
+ default:
+ OPENSSL_assert(0);
+ break;
+ }
+ buffer = OPENSSL_malloc(length);
+
+ if (buffer == NULL)
+ {
+ BIO_printf(bio_err,"out of memory\n");
+ return 0;
+ }
+
+ switch (peer.sa.sa_family)
+ {
+ case AF_INET:
+ memcpy(buffer,
+ &peer.s4.sin_port,
+ sizeof(peer.s4.sin_port));
+ memcpy(buffer + sizeof(peer.s4.sin_port),
+ &peer.s4.sin_addr,
+ sizeof(struct in_addr));
+ break;
+#if OPENSSL_USE_IPV6
+ case AF_INET6:
+ memcpy(buffer,
+ &peer.s6.sin6_port,
+ sizeof(peer.s6.sin6_port));
+ memcpy(buffer + sizeof(peer.s6.sin6_port),
+ &peer.s6.sin6_addr,
+ sizeof(struct in6_addr));
+ break;
+#endif
+ default:
+ OPENSSL_assert(0);
+ break;
+ }
+
+ /* Calculate HMAC of buffer using the secret */
+ HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
+ buffer, length, result, &resultlength);
+ OPENSSL_free(buffer);
+
+ memcpy(cookie, result, resultlength);
+ *cookie_len = resultlength;
+
+ return 1;
+ }
+
+int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
+ {
+ unsigned char *buffer, result[EVP_MAX_MD_SIZE];
+ unsigned int length, resultlength;
+ union {
+ struct sockaddr sa;
+ struct sockaddr_in s4;
+#if OPENSSL_USE_IPV6
+ struct sockaddr_in6 s6;
+#endif
+ } peer;
+
+ /* If secret isn't initialized yet, the cookie can't be valid */
+ if (!cookie_initialized)
+ return 0;
+
+ /* Read peer information */
+ (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
+
+ /* Create buffer with peer's address and port */
+ length = 0;
+ switch (peer.sa.sa_family)
+ {
+ case AF_INET:
+ length += sizeof(struct in_addr);
+ length += sizeof(peer.s4.sin_port);
+ break;
+#if OPENSSL_USE_IPV6
+ case AF_INET6:
+ length += sizeof(struct in6_addr);
+ length += sizeof(peer.s6.sin6_port);
+ break;
+#endif
+ default:
+ OPENSSL_assert(0);
+ break;
+ }
+ buffer = OPENSSL_malloc(length);
+
+ if (buffer == NULL)
+ {
+ BIO_printf(bio_err,"out of memory\n");
+ return 0;
+ }
+
+ switch (peer.sa.sa_family)
+ {
+ case AF_INET:
+ memcpy(buffer,
+ &peer.s4.sin_port,
+ sizeof(peer.s4.sin_port));
+ memcpy(buffer + sizeof(peer.s4.sin_port),
+ &peer.s4.sin_addr,
+ sizeof(struct in_addr));
+ break;
+#if OPENSSL_USE_IPV6
+ case AF_INET6:
+ memcpy(buffer,
+ &peer.s6.sin6_port,
+ sizeof(peer.s6.sin6_port));
+ memcpy(buffer + sizeof(peer.s6.sin6_port),
+ &peer.s6.sin6_addr,
+ sizeof(struct in6_addr));
+ break;
+#endif
+ default:
+ OPENSSL_assert(0);
+ break;
+ }
+
+ /* Calculate HMAC of buffer using the secret */
+ HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
+ buffer, length, result, &resultlength);
+ OPENSSL_free(buffer);
+
+ if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
+ return 1;
+
+ return 0;
+ }
+
+/* Example of extended certificate handling. Where the standard support
+ * of one certificate per algorithm is not sufficient an application
+ * can decide which certificate(s) to use at runtime based on whatever
+ * criteria it deems appropriate.
+ */
+
+/* Linked list of certificates, keys and chains */
+struct ssl_excert_st
+ {
+ int certform;
+ const char *certfile;
+ int keyform;
+ const char *keyfile;
+ const char *chainfile;
+ X509 *cert;
+ EVP_PKEY *key;
+ STACK_OF(X509) *chain;
+ int build_chain;
+ struct ssl_excert_st *next, *prev;
+ };
+
+/* Very basic selection callback: just use any certificate chain
+ * reported as valid. More sophisticated could prioritise according
+ * to local policy.
+ */
+static int set_cert_cb(SSL *ssl, void *arg)
+ {
+ SSL_EXCERT *exc = arg;
+ SSL_certs_clear(ssl);
+
+ if (!exc)
+ return 1;
+
+ /* Go to end of list and traverse backwards since we prepend
+ * newer entries this retains the original order.
+ */
+ while (exc->next)
+ exc = exc->next;
+
+ while(exc)
+ {
+ if (SSL_check_chain(ssl, exc->cert, exc->key, exc->chain))
+ {
+ SSL_use_certificate(ssl, exc->cert);
+ SSL_use_PrivateKey(ssl, exc->key);
+ /* NB: we wouldn't normally do this as it is
+ * not efficient building chains on each connection
+ * better to cache the chain in advance.
+ */
+ if (exc->build_chain)
+ {
+ if (!SSL_build_cert_chain(ssl, 0))
+ return 0;
+ }
+ else if (exc->chain)
+ SSL_set1_chain(ssl, exc->chain);
+ }
+ exc = exc->prev;
+ }
+ return 1;
+ }
+
+void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
+ {
+ SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
+ }
+
+static int ssl_excert_prepend(SSL_EXCERT **pexc)
+ {
+ SSL_EXCERT *exc;
+ exc = OPENSSL_malloc(sizeof(SSL_EXCERT));
+ if (!exc)
+ return 0;
+ exc->certfile = NULL;
+ exc->keyfile = NULL;
+ exc->chainfile = NULL;
+ exc->cert = NULL;
+ exc->key = NULL;
+ exc->chain = NULL;
+ exc->prev = NULL;
+ exc->build_chain = 0;
+
+ exc->next = *pexc;
+ *pexc = exc;
+
+ if (exc->next)
+ {
+ exc->certform = exc->next->certform;
+ exc->keyform = exc->next->keyform;
+ exc->next->prev = exc;
+ }
+ else
+ {
+ exc->certform = FORMAT_PEM;
+ exc->keyform = FORMAT_PEM;
+ }
+ return 1;
+
+ }
+
+void ssl_excert_free(SSL_EXCERT *exc)
+ {
+ SSL_EXCERT *curr;
+ while (exc)
+ {
+ if (exc->cert)
+ X509_free(exc->cert);
+ if (exc->key)
+ EVP_PKEY_free(exc->key);
+ if (exc->chain)
+ sk_X509_pop_free(exc->chain, X509_free);
+ curr = exc;
+ exc = exc->next;
+ OPENSSL_free(curr);
+ }
+ }
+
+int load_excert(SSL_EXCERT **pexc, BIO *err)
+ {
+ SSL_EXCERT *exc = *pexc;
+ if (!exc)
+ return 1;
+ /* If nothing in list, free and set to NULL */
+ if (!exc->certfile && !exc->next)
+ {
+ ssl_excert_free(exc);
+ *pexc = NULL;
+ return 1;
+ }
+ for(; exc; exc=exc->next)
+ {
+ if (!exc->certfile)
+ {
+ BIO_printf(err, "Missing filename\n");
+ return 0;
+ }
+ exc->cert = load_cert(err, exc->certfile, exc->certform,
+ NULL, NULL, "Server Certificate");
+ if (!exc->cert)
+ return 0;
+ if (exc->keyfile)
+ exc->keyfile = exc->certfile;
+ exc->key = load_key(err, exc->certfile, exc->certform, 0,
+ NULL, NULL, "Server Certificate");
+ if (!exc->key)
+ return 0;
+ if (exc->chainfile)
+ {
+ exc->chain = load_certs(err,
+ exc->chainfile, FORMAT_PEM,
+ NULL, NULL,
+ "Server Chain");
+ if (!exc->chainfile)
+ return 0;
+ }
+ }
+ return 1;
+ }
+
+
+int args_excert(char ***pargs, int *pargc,
+ int *badarg, BIO *err, SSL_EXCERT **pexc)
+ {
+ char *arg = **pargs, *argn = (*pargs)[1];
+ SSL_EXCERT *exc = *pexc;
+ int narg = 2;
+ if (!exc)
+ {
+ if (ssl_excert_prepend(&exc))
+ *pexc = exc;
+ else
+ {
+ BIO_printf(err, "Error initialising xcert\n");
+ *badarg = 1;
+ goto err;
+ }
+ }
+ if (strcmp(arg, "-xcert") == 0)
+ {
+ if (!argn)
+ {
+ *badarg = 1;
+ return 1;
+ }
+ if (exc->certfile && !ssl_excert_prepend(&exc))
+ {
+ BIO_printf(err, "Error adding xcert\n");
+ *badarg = 1;
+ goto err;
+ }
+ exc->certfile = argn;
+ }
+ else if (strcmp(arg,"-xkey") == 0)
+ {
+ if (!argn)
+ {
+ *badarg = 1;
+ return 1;
+ }
+ if (exc->keyfile)
+ {
+ BIO_printf(err, "Key already specified\n");
+ *badarg = 1;
+ return 1;
+ }
+ exc->keyfile = argn;
+ }
+ else if (strcmp(arg,"-xchain") == 0)
+ {
+ if (!argn)
+ {
+ *badarg = 1;
+ return 1;
+ }
+ if (exc->chainfile)
+ {
+ BIO_printf(err, "Chain already specified\n");
+ *badarg = 1;
+ return 1;
+ }
+ exc->chainfile = argn;
+ }
+ else if (strcmp(arg,"-xchain_build") == 0)
+ {
+ narg = 1;
+ exc->build_chain = 1;
+ }
+ else if (strcmp(arg,"-xcertform") == 0)
+ {
+ if (!argn)
+ {
+ *badarg = 1;
+ goto err;
+ }
+ exc->certform = str2fmt(argn);
+ }
+ else if (strcmp(arg,"-xkeyform") == 0)
+ {
+ if (!argn)
+ {
+ *badarg = 1;
+ goto err;
+ }
+ exc->keyform = str2fmt(argn);
+ }
+ else
+ return 0;
+
+ (*pargs) += narg;
+
+ if (pargc)
+ *pargc -= narg;
+
+ *pexc = exc;
+
+ return 1;
+
+ err:
+ ERR_print_errors(err);
+ ssl_excert_free(exc);
+ *pexc = NULL;
+ return 1;
+ }
+