SSL_CTX *ssl_ctx; // Global SSL context
+char key_file[PATH_MAX] = "";
+char cert_file[PATH_MAX] = "";
char *ssl_cipher_list = DEFAULT_SSL_CIPHER_LIST;
pthread_key_t ThreadSSL; // Per-thread SSL context
}
+// Set the private key and certificate chain for the global SSL Context.
+// This is called during initialization, and can be called again later if the certificate changes.
+void bind_to_key_and_certificate(void) {
+ if (IsEmptyStr(key_file)) {
+ snprintf(key_file, sizeof key_file, "%s/keys/citadel.key", ctdl_dir);
+ }
+ if (IsEmptyStr(cert_file)) {
+ snprintf(cert_file, sizeof key_file, "%s/keys/citadel.cer", ctdl_dir);
+ }
+
+ syslog(LOG_DEBUG, "crypto: [re]installing key \"%s\" and certificate \"%s\"", key_file, cert_file);
+
+ SSL_CTX_use_certificate_chain_file(ssl_ctx, cert_file);
+ SSL_CTX_use_PrivateKey_file(ssl_ctx, key_file, SSL_FILETYPE_PEM);
+
+ if ( !SSL_CTX_check_private_key(ssl_ctx) ) {
+ syslog(LOG_WARNING, "crypto: cannot install certificate: %s", ERR_reason_error_string(ERR_get_error()));
+ }
+}
+
+
// initialize ssl engine, load certs and initialize openssl internals
void init_ssl(void) {
const SSL_METHOD *ssl_method;
// Now try to bind to the key and certificate.
- // Note that we use SSL_CTX_use_certificate_chain_file() which allows
- // the certificate file to contain intermediate certificates.
+ bind_to_key_and_certificate();
+}
- char *key_file[PATH_MAX];
- char *cert_file[PATH_MAX];
- snprintf(key_file, sizeof key_file, "%s/keys/citadel.key", ctdl_dir);
- snprintf(cert_file, sizeof key_file, "%s/keys/citadel.cer", ctdl_dir);
+// Check the modification time of the key and certificate -- reload if they changed
+void update_key_and_cert_if_needed(void) {
+ static time_t cert_mtime = 0;
+ struct stat keystat;
+ struct stat certstat;
- SSL_CTX_use_certificate_chain_file(ssl_ctx, cert_file);
- SSL_CTX_use_PrivateKey_file(ssl_ctx, key_file, SSL_FILETYPE_PEM);
+ if (stat(key_file, &keystat) != 0) {
+ syslog(LOG_ERR, "%s: %s", key_file, strerror(errno));
+ return;
+ }
+ if (stat(cert_file, &certstat) != 0) {
+ syslog(LOG_ERR, "%s: %s", cert_file, strerror(errno));
+ return;
+ }
- if ( !SSL_CTX_check_private_key(ssl_ctx) ) {
- syslog(LOG_WARNING, "crypto: cannot install certificate: %s", ERR_reason_error_string(ERR_get_error()));
+ if ((keystat.st_mtime > cert_mtime) || (certstat.st_mtime > cert_mtime)) {
+ bind_to_key_and_certificate();
+ cert_mtime = certstat.st_mtime;
}
}
// starts SSL/TLS encryption for the current session.
int starttls(int sock) {
- int retval, bits, alg_bits;
SSL *newssl;
+ int retval, bits, alg_bits;
+ // Check the modification time of the key and certificate -- reload if they changed
+ update_key_and_cert_if_needed();
+
+ // SSL is a thread-specific thing, I think.
pthread_setspecific(ThreadSSL, NULL);
if (!ssl_ctx) {
sleeeeeeeeeep(1);
continue;
}
- syslog(LOG_WARNING, "SSL_write got error %ld, ret %d", errval, retval);
+ syslog(LOG_WARNING, "SSL_write: %s", ERR_reason_error_string(ERR_get_error()));
if (retval == -1) {
syslog(LOG_WARNING, "errno is %d\n", errno);
}
sleeeeeeeeeep(1);
continue;
}
- syslog(LOG_WARNING, "SSL_read got error %ld", errval);
+ syslog(LOG_WARNING, "SSL_read in client_read: %s", ERR_reason_error_string(ERR_get_error()));
endtls();
return (-1);
}