-/* Copyright (C) 2009-2010, Martin Johansson <martin@fatbob.nu>
- Copyright (C) 2005-2010, Thorvald Natvig <thorvald@natvig.com>
+/* Copyright (C) 2009-2012, Martin Johansson <martin@fatbob.nu>
+ Copyright (C) 2005-2012, Thorvald Natvig <thorvald@natvig.com>
All rights reserved.
*/
#include <string.h>
#include <stdlib.h>
+#include <fcntl.h>
#include "conf.h"
#include "log.h"
#include <polarssl/ssl.h>
#include <polarssl/net.h>
-#define CA_CRT_FILENAME "ca.crt"
-
+#ifdef POLARSSL_API_V1_2
+int ciphers[] =
+{
+ TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
+ TLS_RSA_WITH_AES_256_CBC_SHA,
+ TLS_RSA_WITH_AES_128_CBC_SHA,
+ 0
+};
+#else
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
};
+#endif
static x509_cert certificate;
static rsa_context key;
-havege_state hs; /* exported to crypt.c */
+bool_t builtInTestCertificate;
+
+#ifdef USE_POLARSSL_HAVEGE
+havege_state hs;
+#else
+int urandom_fd;
+#endif
/* DH prime */
char *my_dhm_P =
"DEF409C08E8AC24D1732A6128D2220DC53";
char *my_dhm_G = "4";
+#ifdef USE_POLARSSL_TESTCERT
+static void initTestCert()
+{
+ int rc;
+ builtInTestCertificate = true;
+ rc = x509parse_crt(&certificate, (unsigned char *)test_srv_crt,
+ strlen(test_srv_crt));
+ if (rc != 0)
+ Log_fatal("Could not parse built-in test certificate");
+}
+
+static void initTestKey()
+{
+ int rc;
+
+ rc = x509parse_key(&key, (unsigned char *)test_srv_key,
+ strlen(test_srv_key), NULL, 0);
+ if (rc != 0)
+ Log_fatal("Could not parse built-in test RSA key");
+}
+#endif
+
+/*
+ * How to generate a self-signed cert with openssl:
+ * openssl genrsa 1024 > host.key
+ * openssl req -new -x509 -nodes -sha1 -days 365 -key host.key > host.cert
+ */
static void initCert()
{
int rc;
char *crtfile = (char *)getStrConf(CERTIFICATE);
- char *ca_file, *p;
- if (crtfile == NULL)
- Log_fatal("No certificate file specified");
+ if (crtfile == NULL) {
+#ifdef USE_POLARSSL_TESTCERT
+ Log_warn("No certificate file specified. Falling back to test certificate.");
+ initTestCert();
+#else
+ Log_fatal("No certificate file specified");
+#endif
+ return;
+ }
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);
+ if (rc != 0) {
+#ifdef USE_POLARSSL_TESTCERT
+ Log_warn("Could not read certificate file '%s'. Falling back to test certificate.", crtfile);
+ initTestCert();
+#else
+ Log_fatal("Could not read certificate file '%s'", crtfile);
+#endif
+ return;
}
}
{
int rc;
char *keyfile = (char *)getStrConf(KEY);
-
+
if (keyfile == NULL)
Log_fatal("No key file specified");
rc = x509parse_keyfile(&key, keyfile, NULL);
Log_fatal("Could not read RSA key file %s", keyfile);
}
+#ifndef USE_POLARSSL_HAVEGE
+int urandom_bytes(void *ctx, unsigned char *dest, size_t len)
+{
+ int cur;
+
+ while (len) {
+ cur = read(urandom_fd, dest, len);
+ if (cur < 0)
+ continue;
+ len -= cur;
+ }
+}
+#endif
+
#define DEBUG_LEVEL 0
-static void pssl_debug(void *ctx, int level, char *str)
+static void pssl_debug(void *ctx, int level, const char *str)
{
if (level <= DEBUG_LEVEL)
- Log_debug("PolarSSL [level %d]: %s", level, str);
+ Log_info("PolarSSL [level %d]: %s", level, str);
}
void SSLi_init(void)
{
+ char verstring[12];
+
initCert();
+#ifdef USE_POLARSSL_TESTCERT
+ if (builtInTestCertificate) {
+ Log_warn("*** Using built-in test certificate and RSA key ***");
+ Log_warn("*** This is not secure! Please use a CA-signed certificate or create a key and self-signed certificate ***");
+ initTestKey();
+ }
+ else
+ initKey();
+#else
initKey();
+#endif
+
+ /* Initialize random number generator */
+#ifdef USE_POLARSSL_HAVEGE
havege_init(&hs);
+#else
+ urandom_fd = open("/dev/urandom", O_RDONLY);
+ if (urandom_fd < 0)
+ Log_fatal("Cannot open /dev/urandom");
+ Log_info("Using random number generator /dev/urandom");
+#endif
+
+#ifdef POLARSSL_VERSION_MAJOR
+ version_get_string(verstring);
+ Log_info("PolarSSL library version %s initialized", verstring);
+#else
Log_info("PolarSSL library initialized");
+#endif
}
void SSLi_deinit(void)
rsa_free(&key);
}
+/* Create SHA1 of last certificate in the peer's chain. */
+bool_t SSLi_getSHA1Hash(SSL_handle_t *ssl, uint8_t *hash)
+{
+ x509_cert const *cert;
+#ifdef POLARSSL_API_V1_2
+ cert = ssl_get_peer_cert(ssl);
+#else
+ cert = ssl->peer_cert;
+#endif
+ if (!cert) {
+ return false;
+ }
+ sha1(cert->raw.p, cert->raw.len, hash);
+ return true;
+}
+
SSL_handle_t *SSLi_newconnection(int *fd, bool_t *SSLready)
{
ssl_context *ssl;
rc = ssl_init(ssl);
if (rc != 0 )
- Log_fatal("Failed to initalize: %d", rc);
+ Log_fatal("Failed to initialize: %d", rc);
ssl_set_endpoint(ssl, SSL_IS_SERVER);
- ssl_set_authmode(ssl, SSL_VERIFY_OPTIONAL);
+ ssl_set_authmode(ssl, SSL_VERIFY_OPTIONAL);
+
+#ifdef USE_POLARSSL_HAVEGE
+ ssl_set_rng(ssl, HAVEGE_RAND, &hs);
+#else
+ ssl_set_rng(ssl, urandom_bytes, NULL);
+#endif
+
+ ssl_set_dbg(ssl, pssl_debug, NULL);
+ ssl_set_bio(ssl, net_recv, fd, net_send, fd);
- ssl_set_rng(ssl, havege_rand, &hs);
- ssl_set_dbg(ssl, pssl_debug, NULL);
- ssl_set_bio(ssl, net_recv, fd, net_send, fd);
+#ifdef POLARSSL_API_V1
+ ssl_set_ciphersuites(ssl, ciphers);
+#else
+ ssl_set_ciphers(ssl, ciphers);
+#endif
- ssl_set_ciphers(ssl, ciphers);
+#ifdef POLARSSL_API_V1_2
+ ssl_set_session(ssl, ssn);
+#else
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);
+#endif
+
+ ssl_set_ca_chain(ssl, &certificate, NULL, NULL);
+ ssl_set_own_cert(ssl, &certificate, &key);
+ ssl_set_dh_param(ssl, my_dhm_P, my_dhm_G);
return ssl;
}
rc = ssl_handshake(ssl);
if (rc != 0) {
+#ifdef POLARSSL_API_V1
+ if (rc == POLARSSL_ERR_NET_WANT_READ || rc == POLARSSL_ERR_NET_WANT_WRITE) {
+#else
if (rc == POLARSSL_ERR_NET_TRY_AGAIN) {
+#endif
return 0;
+ } else if (POLARSSL_ERR_X509_CERT_VERIFY_FAILED) { /* Allow this (selfsigned etc) */
+ return 0;
} else {
Log_warn("SSL handshake failed: %d", rc);
return -1;
int SSLi_read(SSL_handle_t *ssl, uint8_t *buf, int len)
{
int rc;
+
rc = ssl_read(ssl, buf, len);
+#ifdef POLARSSL_API_V1
+ if (rc == POLARSSL_ERR_NET_WANT_READ)
+#else
if (rc == POLARSSL_ERR_NET_TRY_AGAIN)
+#endif
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);
+#ifdef POLARSSL_API_V1
+ if (rc == POLARSSL_ERR_NET_WANT_WRITE)
+#else
if (rc == POLARSSL_ERR_NET_TRY_AGAIN)
+#endif
return SSLI_ERROR_WANT_WRITE;
return rc;
}
void SSLi_free(SSL_handle_t *ssl)
{
- free(ssl->session);
+ Log_debug("SSLi_free");
+ free(ssl->session); /* XXX - Hmmm. */
+ ssl_free(ssl);
free(ssl);
}
static RSA *rsa;
static SSL_CTX *context;
static EVP_PKEY *pkey;
+
+static int verify_callback(int preverify_ok, X509_STORE_CTX *ctx);
static int SSL_add_ext(X509 * crt, int nid, char *value) {
X509_EXTENSION *ex;
{
const SSL_METHOD *method;
SSL *ssl;
- int i, offset = 0;
+ int i, offset = 0, cipherstringlen = 0;
STACK_OF(SSL_CIPHER) *cipherlist = NULL, *cipherlist_new = NULL;
SSL_CIPHER *cipher;
- char cipherstring[1024];
+ char *cipherstring, tempstring[128];
SSL_library_init();
OpenSSL_add_all_algorithms(); /* load & register all cryptos, etc. */
}
Log_debug("List of ciphers:");
if (cipherlist_new) {
- for ( i = 0; (cipher = sk_SSL_CIPHER_value(cipherlist_new, i)) != NULL; i++) {
+ for (i = 0; (cipher = sk_SSL_CIPHER_value(cipherlist_new, i)) != NULL; i++) {
Log_debug("%s", SSL_CIPHER_get_name(cipher));
- offset += snprintf(cipherstring + offset, 1024 - offset, "%s:", SSL_CIPHER_get_name(cipher));
+ cipherstringlen += strlen(SSL_CIPHER_get_name(cipher)) + 1;
+ }
+ cipherstring = malloc(cipherstringlen + 1);
+ if (cipherstring == NULL)
+ Log_fatal("Out of memory");
+ for (i = 0; (cipher = sk_SSL_CIPHER_value(cipherlist_new, i)) != NULL; i++) {
+ offset += sprintf(cipherstring + offset, "%s:", SSL_CIPHER_get_name(cipher));
}
- cipherstring[offset - 1] = '\0';
}
if (cipherlist_new)
if (SSL_CTX_set_cipher_list(context, cipherstring) == 0)
Log_fatal("Failed to set cipher list!");
-
+
+ free(cipherstring);
+
+ SSL_CTX_set_verify(context, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
+ verify_callback);
SSL_free(ssl);
Log_info("OpenSSL library initialized");
return ssl;
}
+/* Create SHA1 of last certificate in the peer's chain. */
+bool_t SSLi_getSHA1Hash(SSL_handle_t *ssl, uint8_t *hash)
+{
+ X509 *x509;
+ uint8_t *buf, *p;
+ int len;
+
+ x509 = SSL_get_peer_certificate(ssl);
+ if (!x509) {
+ return false;
+ }
+
+ len = i2d_X509(x509, NULL);
+ buf = malloc(len);
+ if (buf == NULL) {
+ Log_fatal("malloc");
+ }
+
+ p = buf;
+ i2d_X509(x509, &p);
+
+ SHA1(buf, len, hash);
+ free(buf);
+ return true;
+}
+
void SSLi_closeconnection(SSL_handle_t *ssl)
{
SSL_free(ssl);
SSL_free(ssl);
}
+static int verify_callback(int preverify_ok, X509_STORE_CTX *ctx)
+{
+ char buf[256];
+ X509 *err_cert;
+ int err, depth;
+ SSL *ssl;
+
+ err_cert = X509_STORE_CTX_get_current_cert(ctx);
+ err = X509_STORE_CTX_get_error(ctx);
+ depth = X509_STORE_CTX_get_error_depth(ctx);
+
+ ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
+ X509_NAME_oneline(X509_get_subject_name(err_cert), buf, 256);
+
+ if (depth > 5) {
+ preverify_ok = 0;
+ err = X509_V_ERR_CERT_CHAIN_TOO_LONG;
+ X509_STORE_CTX_set_error(ctx, err);
+ }
+ if (!preverify_ok) {
+ Log_warn("SSL: verify error:num=%d:%s:depth=%d:%s\n", err,
+ X509_verify_cert_error_string(err), depth, buf);
+ }
+ /*
+ * At this point, err contains the last verification error. We can use
+ * it for something special
+ */
+ if (!preverify_ok && (err == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT)) {
+ X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf, 256);
+ Log_warn("issuer= %s", buf);
+ }
+ return 1;
+}
+
#endif
projects / umurmur.git / blobdiff