/*
- * $Id$
+ * Copyright (c) 1996-2012 by the citadel.org team
*
- * Provides HTTPS, when the OpenSSL library is available.
+ * This program is open source software. You can redistribute it and/or
+ * modify it under the terms of the GNU General Public License, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*/
+#include "sysdep.h"
#ifdef HAVE_OPENSSL
#include "webcit.h"
#include "webserver.h"
-#define CTDL_CRYPTO_DIR "./keys"
-#define CTDL_KEY_PATH CTDL_CRYPTO_DIR "/citadel.key"
-#define CTDL_CSR_PATH CTDL_CRYPTO_DIR "/citadel.csr"
-#define CTDL_CER_PATH CTDL_CRYPTO_DIR "/citadel.cer"
-#define SIGN_DAYS 365
+/* where to find the keys */
+#define CTDL_CRYPTO_DIR ctdl_key_dir
+#define CTDL_KEY_PATH file_crpt_file_key
+#define CTDL_CSR_PATH file_crpt_file_csr
+#define CTDL_CER_PATH file_crpt_file_cer
+#define SIGN_DAYS 3650 /* how long our certificate should live */
SSL_CTX *ssl_ctx; /* SSL context */
pthread_mutex_t **SSLCritters; /* Things needing locking */
+char *ssl_cipher_list = DEFAULT_SSL_CIPHER_LIST;
pthread_key_t ThreadSSL; /* Per-thread SSL context */
return (unsigned long) pthread_self();
}
+void shutdown_ssl(void)
+{
+ ERR_free_strings();
+
+ /* Openssl requires these while shutdown.
+ * Didn't find a way to get out of this clean.
+ * int i, n = CRYPTO_num_locks();
+ * for (i = 0; i < n; i++)
+ * free(SSLCritters[i]);
+ * free(SSLCritters);
+ */
+}
+/*
+ * initialize ssl engine, load certs and initialize openssl internals
+ */
void init_ssl(void)
{
- SSL_METHOD *ssl_method;
+ const SSL_METHOD *ssl_method;
RSA *rsa=NULL;
X509_REQ *req = NULL;
X509 *cer = NULL;
X509_NAME *name = NULL;
FILE *fp;
char buf[SIZ];
+ int rv = 0;
- if (!access("/var/run/egd-pool", F_OK))
+ if (!access("/var/run/egd-pool", F_OK)) {
RAND_egd("/var/run/egd-pool");
+ }
if (!RAND_status()) {
- lprintf(3,
- "PRNG not adequately seeded, won't do SSL/TLS\n");
+ syslog(3, "PRNG not adequately seeded, won't do SSL/TLS\n");
return;
}
- SSLCritters =
- malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t *));
+ SSLCritters = malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t *));
if (!SSLCritters) {
- lprintf(1, "citserver: can't allocate memory!!\n");
+ syslog(1, "citserver: can't allocate memory!!\n");
/* Nothing's been initialized, just die */
- exit(1);
+ ShutDownWebcit();
+ exit(WC_EXIT_SSL);
} else {
int a;
for (a = 0; a < CRYPTO_num_locks(); a++) {
SSLCritters[a] = malloc(sizeof(pthread_mutex_t));
if (!SSLCritters[a]) {
- lprintf(1,
+ syslog(1,
"citserver: can't allocate memory!!\n");
- /* Nothing's been initialized, just die */
- exit(1);
+ /** Nothing's been initialized, just die */
+ ShutDownWebcit();
+ exit(WC_EXIT_SSL);
}
pthread_mutex_init(SSLCritters[a], NULL);
}
SSL_load_error_strings();
ssl_method = SSLv23_server_method();
if (!(ssl_ctx = SSL_CTX_new(ssl_method))) {
- lprintf(3, "SSL_CTX_new failed: %s\n",
- ERR_reason_error_string(ERR_get_error()));
+ syslog(3, "SSL_CTX_new failed: %s\n", ERR_reason_error_string(ERR_get_error()));
+ return;
+ }
+
+ syslog(9, "Requesting cipher list: %s\n", ssl_cipher_list);
+ if (!(SSL_CTX_set_cipher_list(ssl_ctx, ssl_cipher_list))) {
+ syslog(3, "SSL_CTX_set_cipher_list failed: %s\n", ERR_reason_error_string(ERR_get_error()));
return;
}
CRYPTO_set_locking_callback(ssl_lock);
CRYPTO_set_id_callback(id_callback);
- /* Get our certificates in order.
+ /*
+ * Get our certificates in order. (FIXME: dirify. this is a setup job.)
* First, create the key/cert directory if it's not there already...
*/
mkdir(CTDL_CRYPTO_DIR, 0700);
*/
if (!strcasecmp(ctdlhost, "uds")) {
sprintf(buf, "%s/keys/citadel.key", ctdlport);
- symlink(buf, CTDL_KEY_PATH);
+ rv = symlink(buf, CTDL_KEY_PATH);
+ if (!rv) syslog(1, "%s\n", strerror(errno));
sprintf(buf, "%s/keys/citadel.csr", ctdlport);
- symlink(buf, CTDL_CSR_PATH);
+ rv = symlink(buf, CTDL_CSR_PATH);
+ if (!rv) syslog(1, "%s\n", strerror(errno));
sprintf(buf, "%s/keys/citadel.cer", ctdlport);
- symlink(buf, CTDL_CER_PATH);
+ rv = symlink(buf, CTDL_CER_PATH);
+ if (!rv) syslog(1, "%s\n", strerror(errno));
}
/*
* If we still don't have a private key, generate one.
*/
if (access(CTDL_KEY_PATH, R_OK) != 0) {
- lprintf(5, "Generating RSA key pair.\n");
+ syslog(5, "Generating RSA key pair.\n");
rsa = RSA_generate_key(1024, /* modulus size */
65537, /* exponent */
NULL, /* no callback */
- NULL); /* no callback */
+ NULL /* no callback */
+ );
if (rsa == NULL) {
- lprintf(3, "Key generation failed: %s\n",
- ERR_reason_error_string(ERR_get_error()));
+ syslog(3, "Key generation failed: %s\n", ERR_reason_error_string(ERR_get_error()));
}
if (rsa != NULL) {
fp = fopen(CTDL_KEY_PATH, "w");
NULL, /* no callbk */
NULL /* no callbk */
) != 1) {
- lprintf(3, "Cannot write key: %s\n",
- ERR_reason_error_string(ERR_get_error()));
+ syslog(3, "Cannot write key: %s\n",
+ ERR_reason_error_string(ERR_get_error()));
unlink(CTDL_KEY_PATH);
}
fclose(fp);
}
+ else {
+ syslog(3, "Cannot write key: %s\n", CTDL_KEY_PATH);
+ ShutDownWebcit();
+ exit(0);
+ }
RSA_free(rsa);
}
}
/*
- * Generate a CSR if we don't have one.
+ * If there is no certificate file on disk, we will be generating a self-signed certificate
+ * in the next step. Therefore, if we have neither a CSR nor a certificate, generate
+ * the CSR in this step so that the next step may commence.
*/
- if (access(CTDL_CSR_PATH, R_OK) != 0) {
- lprintf(5, "Generating a certificate signing request.\n");
+ if ( (access(CTDL_CER_PATH, R_OK) != 0) && (access(CTDL_CSR_PATH, R_OK) != 0) ) {
+ syslog(5, "Generating a certificate signing request.\n");
/*
* Read our key from the file. No, we don't just keep this
if (rsa) {
- /* Create a public key from the private key */
+ /** Create a public key from the private key */
if (pk=EVP_PKEY_new(), pk != NULL) {
EVP_PKEY_assign_RSA(pk, rsa);
if (req = X509_REQ_new(), req != NULL) {
-
+ const char *env;
/* Set the public key */
X509_REQ_set_pubkey(req, pk);
X509_REQ_set_version(req, 0L);
/* Tell it who we are */
/*
+ * We used to add these fields to the subject, but
+ * now we don't. Someone doing this for real isn't
+ * going to use the webcit-generated CSR anyway.
+ *
X509_NAME_add_entry_by_txt(name, "C",
MBSTRING_ASC, "US", -1, -1, 0);
-
+ *
X509_NAME_add_entry_by_txt(name, "ST",
MBSTRING_ASC, "New York", -1, -1, 0);
-
+ *
X509_NAME_add_entry_by_txt(name, "L",
MBSTRING_ASC, "Mount Kisco", -1, -1, 0);
*/
- X509_NAME_add_entry_by_txt(name, "O",
- MBSTRING_ASC, "FIXME.FIXME.org", -1, -1, 0);
-
- X509_NAME_add_entry_by_txt(name, "OU",
- MBSTRING_ASC, "Citadel server", -1, -1, 0);
-
- X509_NAME_add_entry_by_txt(name, "CN",
- MBSTRING_ASC, "FIXME.FIXME.org", -1, -1, 0);
+ env = getenv("O");
+ if (env == NULL)
+ env = "Organization name",
+
+ X509_NAME_add_entry_by_txt(
+ name, "O",
+ MBSTRING_ASC,
+ (unsigned char*)env,
+ -1, -1, 0
+ );
+
+ env = getenv("OU");
+ if (env == NULL)
+ env = "Citadel server";
+
+ X509_NAME_add_entry_by_txt(
+ name, "OU",
+ MBSTRING_ASC,
+ (unsigned char*)env,
+ -1, -1, 0
+ );
+
+ env = getenv("CN");
+ if (env == NULL)
+ env = "*";
+
+ X509_NAME_add_entry_by_txt(
+ name, "CN",
+ MBSTRING_ASC,
+ (unsigned char*)env,
+ -1, -1, 0
+ );
X509_REQ_set_subject_name(req, name);
/* Sign the CSR */
if (!X509_REQ_sign(req, pk, EVP_md5())) {
- lprintf(3, "X509_REQ_sign(): error\n");
+ syslog(3, "X509_REQ_sign(): error\n");
}
else {
/* Write it to disk. */
PEM_write_X509_REQ(fp, req);
fclose(fp);
}
+ else {
+ syslog(3, "Cannot write key: %s\n", CTDL_CSR_PATH);
+ ShutDownWebcit();
+ exit(0);
+ }
}
X509_REQ_free(req);
}
else {
- lprintf(3, "Unable to read private key.\n");
+ syslog(3, "Unable to read private key.\n");
}
}
* Generate a self-signed certificate if we don't have one.
*/
if (access(CTDL_CER_PATH, R_OK) != 0) {
- lprintf(5, "Generating a self-signed certificate.\n");
+ syslog(5, "Generating a self-signed certificate.\n");
/* Same deal as before: always read the key from disk because
* it may or may not have just been generated.
/* Sign the cert */
if (!X509_sign(cer, pk, EVP_md5())) {
- lprintf(3, "X509_sign(): error\n");
+ syslog(3, "X509_sign(): error\n");
}
else {
/* Write it to disk. */
PEM_write_X509(fp, cer);
fclose(fp);
}
+ else {
+ syslog(3, "Cannot write key: %s\n", CTDL_CER_PATH);
+ ShutDownWebcit();
+ exit(0);
+ }
}
X509_free(cer);
}
SSL_CTX_use_certificate_chain_file(ssl_ctx, CTDL_CER_PATH);
SSL_CTX_use_PrivateKey_file(ssl_ctx, CTDL_KEY_PATH, SSL_FILETYPE_PEM);
if ( !SSL_CTX_check_private_key(ssl_ctx) ) {
- lprintf(3, "Cannot install certificate: %s\n",
+ syslog(3, "Cannot install certificate: %s\n",
ERR_reason_error_string(ERR_get_error()));
}
/*
- * starttls() starts SSL/TLS encryption for the current session.
+ * starts SSL/TLS encryption for the current session.
*/
int starttls(int sock) {
- int retval, bits, alg_bits;
+ int retval, bits, alg_bits;/*r; */
SSL *newssl;
pthread_setspecific(ThreadSSL, NULL);
return(1);
}
if (!(newssl = SSL_new(ssl_ctx))) {
- lprintf(3, "SSL_new failed: %s\n",
- ERR_reason_error_string(ERR_get_error()));
+ syslog(3, "SSL_new failed: %s\n", ERR_reason_error_string(ERR_get_error()));
return(2);
}
if (!(SSL_set_fd(newssl, sock))) {
- lprintf(3, "SSL_set_fd failed: %s\n",
- ERR_reason_error_string(ERR_get_error()));
+ syslog(3, "SSL_set_fd failed: %s\n", ERR_reason_error_string(ERR_get_error()));
SSL_free(newssl);
return(3);
}
* revert to unencrypted communications.
*/
long errval;
+ const char *ssl_error_reason = NULL;
+
+ errval = SSL_get_error(newssl, retval);
+ ssl_error_reason = ERR_reason_error_string(ERR_get_error());
+ if (ssl_error_reason == NULL) {
+ syslog(3, "SSL_accept failed: errval=%ld, retval=%d %s\n", errval, retval, strerror(errval));
+ }
+ else {
+ syslog(3, "SSL_accept failed: %s\n", ssl_error_reason);
+ }
+ sleeeeeeeeeep(1);
+ retval = SSL_accept(newssl);
+ }
+ if (retval < 1) {
+ long errval;
+ const char *ssl_error_reason = NULL;
errval = SSL_get_error(newssl, retval);
- lprintf(3, "SSL_accept failed: %s\n",
- ERR_reason_error_string(ERR_get_error()));
+ ssl_error_reason = ERR_reason_error_string(ERR_get_error());
+ if (ssl_error_reason == NULL) {
+ syslog(3, "SSL_accept failed: errval=%ld, retval=%d (%s)\n", errval, retval, strerror(errval));
+ }
+ else {
+ syslog(3, "SSL_accept failed: %s\n", ssl_error_reason);
+ }
SSL_free(newssl);
newssl = NULL;
return(4);
}
- BIO_set_close(newssl->rbio, BIO_NOCLOSE);
- bits =
- SSL_CIPHER_get_bits(SSL_get_current_cipher(newssl),
- &alg_bits);
- lprintf(5, "SSL/TLS using %s on %s (%d of %d bits)\n",
+ else {
+ syslog(15, "SSL_accept success\n");
+ }
+ /*r = */BIO_set_close(newssl->rbio, BIO_NOCLOSE);
+ bits = SSL_CIPHER_get_bits(SSL_get_current_cipher(newssl), &alg_bits);
+ syslog(15, "SSL/TLS using %s on %s (%d of %d bits)\n",
SSL_CIPHER_get_name(SSL_get_current_cipher(newssl)),
SSL_CIPHER_get_version(SSL_get_current_cipher(newssl)),
bits, alg_bits);
pthread_setspecific(ThreadSSL, newssl);
+ syslog(15, "SSL started\n");
return(0);
}
/*
- * endtls() shuts down the TLS connection
+ * shuts down the TLS connection
*
* WARNING: This may make your session vulnerable to a known plaintext
* attack in the current implmentation.
*/
void endtls(void)
{
+ /*SSL_CTX *ctx;*/
+
if (THREADSSL == NULL) return;
- lprintf(5, "Ending SSL/TLS\n");
+ syslog(15, "Ending SSL/TLS\n");
SSL_shutdown(THREADSSL);
+ /*ctx = */SSL_get_SSL_CTX(THREADSSL);
+
+ /* I don't think this is needed, and it crashes the server anyway
+ *
+ * if (ctx != NULL) {
+ * syslog(9, "Freeing CTX at %x\n", (int)ctx );
+ * SSL_CTX_free(ctx);
+ * }
+ */
+
SSL_free(THREADSSL);
pthread_setspecific(ThreadSSL, NULL);
}
/*
- * ssl_lock() callback for OpenSSL mutex locks
+ * callback for OpenSSL mutex locks
*/
void ssl_lock(int mode, int n, const char *file, int line)
{
- if (mode & CRYPTO_LOCK)
+ if (mode & CRYPTO_LOCK) {
pthread_mutex_lock(SSLCritters[n]);
- else
+ }
+ else {
pthread_mutex_unlock(SSLCritters[n]);
+ }
}
/*
- * client_write_ssl() Send binary data to the client encrypted.
+ * Send binary data to the client encrypted.
*/
-void client_write_ssl(char *buf, int nbytes)
+void client_write_ssl(const StrBuf *Buf)
{
+ const char *buf;
int retval;
int nremain;
+ long nbytes;
char junk[1];
if (THREADSSL == NULL) return;
- nremain = nbytes;
+ nbytes = nremain = StrLength(Buf);
+ buf = ChrPtr(Buf);
while (nremain > 0) {
if (SSL_want_write(THREADSSL)) {
if ((SSL_read(THREADSSL, junk, 0)) < 1) {
- lprintf(9, "SSL_read in client_write: %s\n",
+ syslog(9, "SSL_read in client_write: %s\n",
ERR_reason_error_string(ERR_get_error()));
}
}
long errval;
errval = SSL_get_error(THREADSSL, retval);
- if (errval == SSL_ERROR_WANT_READ ||
- errval == SSL_ERROR_WANT_WRITE) {
- sleep(1);
+ if (errval == SSL_ERROR_WANT_READ || errval == SSL_ERROR_WANT_WRITE) {
+ sleeeeeeeeeep(1);
continue;
}
- lprintf(9, "SSL_write got error %ld, ret %d\n", errval, retval);
+ syslog(9, "SSL_write got error %ld, ret %d\n", errval, retval);
if (retval == -1) {
- lprintf(9, "errno is %d\n", errno);
+ syslog(9, "errno is %d\n", errno);
}
endtls();
return;
/*
- * client_read_ssl() - read data from the encrypted layer.
+ * read data from the encrypted layer.
*/
-int client_read_ssl(char *buf, int bytes, int timeout)
+int client_read_sslbuffer(StrBuf *buf, int timeout)
{
-#if 0
- fd_set rfds;
- struct timeval tv;
- int retval;
- int s;
-#endif
- int len, rlen;
+ char sbuf[16384]; /* OpenSSL communicates in 16k blocks, so let's speak its native tongue. */
+ int rlen;
char junk[1];
+ SSL *pssl = THREADSSL;
- if (THREADSSL == NULL) return(0);
+ if (pssl == NULL) return(-1);
- len = 0;
- while (len < bytes) {
-#if 0
- /*
- * This code is disabled because we don't need it when
- * using blocking reads (which we are). -IO
- */
- FD_ZERO(&rfds);
- s = BIO_get_fd(THREADSSL->rbio, NULL);
- FD_SET(s, &rfds);
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
-
- retval = select(s + 1, &rfds, NULL, NULL, &tv);
-
- if (FD_ISSET(s, &rfds) == 0) {
- return (0);
- }
-
-#endif
- if (SSL_want_read(THREADSSL)) {
- if ((SSL_write(THREADSSL, junk, 0)) < 1) {
- lprintf(9, "SSL_write in client_read: %s\n", ERR_reason_error_string(ERR_get_error()));
+ while (1) {
+ if (SSL_want_read(pssl)) {
+ if ((SSL_write(pssl, junk, 0)) < 1) {
+ syslog(9, "SSL_write in client_read\n");
}
}
- rlen = SSL_read(THREADSSL, &buf[len], bytes - len);
+ rlen = SSL_read(pssl, sbuf, sizeof(sbuf));
if (rlen < 1) {
long errval;
- errval = SSL_get_error(THREADSSL, rlen);
- if (errval == SSL_ERROR_WANT_READ ||
- errval == SSL_ERROR_WANT_WRITE) {
- sleep(1);
+ errval = SSL_get_error(pssl, rlen);
+ if (errval == SSL_ERROR_WANT_READ || errval == SSL_ERROR_WANT_WRITE) {
+ sleeeeeeeeeep(1);
continue;
}
- lprintf(9, "SSL_read got error %ld\n", errval);
+ syslog(9, "SSL_read got error %ld\n", errval);
endtls();
- return (0);
+ return (-1);
}
- len += rlen;
+ StrBufAppendBufPlain(buf, sbuf, rlen, 0);
+ return rlen;
}
- return (1);
+ return (0);
}
-
#endif /* HAVE_OPENSSL */
projects / citadel.git / blobdiff