#include "tlsproxy.h"
#include "verify.h"
-/* errno */
+#include <assert.h>
#include <errno.h>
-/* gnutls_x509_*() */
+
#include <gnutls/x509.h>
unsigned int cert_list_size;
FILE *file;
char buffer[66]; /* one line in a PEM file is 64 bytes + '\n' + '\0' */
- char server_cert[8192];
- char stored_cert[8192];
+ char server_cert[16384];
+ char stored_cert[16384];
result = gnutls_certificate_verify_peers2(session, &status);
/* Verification failed (!= invalid certificate but worse), no need for any
* more checks. */
if (result < 0) {
- LOG(LOG_WARNING,
- "verify_tls_connection(): gnutls_certificate_verify_peers2() failed: %s",
+ LOG(WARNING,
+ "verify_tls_connection(): "
+ "gnutls_certificate_verify_peers2() failed: %s",
gnutls_strerror(result));
return -1;
}
|| status & GNUTLS_CERT_REVOKED
|| status & GNUTLS_CERT_NOT_ACTIVATED
|| status & GNUTLS_CERT_INSECURE_ALGORITHM) {
- LOG(LOG_WARNING,
- "verify_tls_connection(): invalid server certificate");
+ LOG(WARNING, "verify_tls_connection(): invalid server certificate");
return -1;
}
* prevent an attacker from changing the certificate type to prevent
* detection. */
if (gnutls_certificate_type_get(session) != GNUTLS_CRT_X509) {
- LOG(LOG_WARNING,
- "verify_tls_connection(): no X509 server certificate");
+ LOG(WARNING, "verify_tls_connection(): no X509 server certificate");
return -1;
}
result = gnutls_x509_crt_init(&cert);
if (result < 0) {
- LOG(LOG_WARNING,
+ LOG(WARNING,
"verify_tls_connection(): gnutls_x509_crt_init() failed: %s",
gnutls_strerror(result));
return -1;
cert_list = gnutls_certificate_get_peers(session, &cert_list_size);
if (cert_list == NULL) {
- LOG(LOG_WARNING,
+ LOG(WARNING,
"verify_tls_connection(): gnutls_certificate_get_peers() failed");
gnutls_x509_crt_deinit(cert);
return -1;
result = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
if (result < 0) {
- LOG(LOG_WARNING,
+ LOG(WARNING,
"verify_tls_connection(): gnutls_x509_crt_import() failed: %s",
gnutls_strerror(result));
gnutls_x509_crt_deinit(cert);
result = gnutls_x509_crt_export(cert, GNUTLS_X509_FMT_PEM,
server_cert, &size);
if (result != GNUTLS_E_SUCCESS) {
- LOG(LOG_WARNING,
+ LOG(WARNING,
"verify_tls_connection(): gnutls_x509_crt_export() failed: %s",
gnutls_strerror(result));
gnutls_x509_crt_deinit(cert);
/* Open stored server certificate file. */
if (server_certificate_file(&file, hostname, path, sizeof(path)) != 0) {
- LOG(LOG_DEBUG, "server certificate:\n%s", server_cert);
+ LOG(DEBUG1, "server certificate:\n%s", server_cert);
return -1;
}
size += strlen(buffer);
/* Make sure the buffer is big enough. */
if (size >= sizeof(stored_cert)) {
- LOG(LOG_WARNING, "verify_tls_connection(): '%s' too big", path);
+ LOG(WARNING, "verify_tls_connection(): '%s' too big", path);
fclose(file);
- LOG(LOG_DEBUG, "server certificate:\n%s", server_cert);
+ LOG(DEBUG1, "server certificate:\n%s", server_cert);
return -1;
}
strcat(stored_cert, buffer);
}
if (ferror(file)) {
+ LOG(WARNING, "verify_tls_connection(): failed to read from '%s': %s",
+ path, strerror(errno));
fclose(file);
- LOG(LOG_WARNING,
- "verify_tls_connection(): failed to read from '%s': %s",
- path, strerror(errno));
- LOG(LOG_DEBUG, "server certificate:\n%s", server_cert);
+ LOG(DEBUG1, "server certificate:\n%s", server_cert);
return -1;
}
fclose(file);
/* Check if the server certificate matches our stored certificate. */
- if (strcmp(stored_cert, server_cert) != 0) {
- LOG(LOG_ERROR,
- "verify_tls_connection(): server certificate changed!",
- path, strerror(errno));
+ if (strcmp(stored_cert, server_cert)) {
+ LOG(ERROR, "verify_tls_connection(): server certificate changed!",
+ path, strerror(errno));
- LOG(LOG_WARNING, "server certificate:\n%s", server_cert);
+ LOG(WARNING, "server certificate:\n%s", server_cert);
return -2;
}
}
file = fopen(path, "r");
if (file == NULL) {
- LOG(LOG_WARNING,
+ LOG(WARNING,
"verify_tls_connection(): proxy certificate doesn't exist: '%s'",
path);
return -1;
int result;
/* Hostname too long. */
+ assert(size > strlen(format));
if (size - strlen(format) <= strlen(hostname)) {
- LOG(LOG_WARNING,
- "get_certificate_path(): hostname too long: '%s'",
- hostname);
+ LOG(WARNING, "get_certificate_path(): hostname too long: '%s'",
+ hostname);
return -1;
}
/* Try to prevent path traversals in hostnames. */
if (strstr(hostname, "..") != NULL) {
- LOG(LOG_WARNING,
- "get_certificate_path(): possible path traversal: '%s'",
- hostname);
+ LOG(WARNING, "get_certificate_path(): possible path traversal: '%s'",
+ hostname);
return -1;
}
/* Safe as format is no user input. */
result = snprintf(buffer, size, format, hostname);
if (result < 0) {
- LOG_PERROR(LOG_ERROR, "get_certificate_path(): snprintf failed");
+ LOG_PERROR(ERROR, "get_certificate_path(): snprintf failed");
return -1;
} else if ((size_t)result >= size) {
- LOG(LOG_ERROR, "get_certificate_path(): snprintf buffer too short");
+ LOG(ERROR, "get_certificate_path(): snprintf buffer too short");
return -1;
}
char *path, size_t size) {
if (get_certificate_path(STORED_SERVER_CERT_FORMAT,
hostname, path, size) != 0) {
- LOG_PERROR(LOG_ERROR,
- "server_certificate_file(): failed to get path");
+ LOG_PERROR(ERROR, "server_certificate_file(): failed to get path");
return -1;
}
*file = fopen(path, "rb");
if (*file == NULL) {
if (global_passthrough_unknown) {
- LOG(LOG_DEBUG,
- "server_certificate_file(): failed to open '%s': %s",
- path, strerror(errno));
+ LOG(DEBUG1, "server_certificate_file(): failed to open '%s': %s",
+ path, strerror(errno));
} else {
- LOG(LOG_WARNING,
- "server_certificate_file(): failed to open '%s': %s",
- path, strerror(errno));
+ LOG(WARNING, "server_certificate_file(): failed to open '%s': %s",
+ path, strerror(errno));
}
/* Couldn't open the file, special case. */
return -2;