/*
- * "$Id$"
- *
* TLS support code for CUPS using GNU TLS.
*
- * Copyright 2007-2014 by Apple Inc.
+ * Copyright 2007-2015 by Apple Inc.
* Copyright 1997-2007 by Easy Software Products, all rights reserved.
*
* These coded instructions, statements, and computer programs are the
* This file is subject to the Apple OS-Developed Software exception.
*/
+/**** This file is included from tls.c ****/
/*
* Include necessary headers...
/* Server cert keychain path */
static _cups_mutex_t tls_mutex = _CUPS_MUTEX_INITIALIZER;
/* Mutex for keychain/certs */
+static int tls_options = -1;/* Options for TLS connections */
/*
* Local functions...
*/
+static gnutls_x509_crt_t http_gnutls_create_credential(http_credential_t *credential);
static const char *http_gnutls_default_path(char *buffer, size_t bufsize);
+static const char *http_gnutls_make_path(char *buffer, size_t bufsize, const char *dirname, const char *filename, const char *ext);
static ssize_t http_gnutls_read(gnutls_transport_ptr_t ptr, void *data, size_t length);
static ssize_t http_gnutls_write(gnutls_transport_ptr_t ptr, const void *data, size_t length);
/*
* 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair.
*
- * @since CUPS 2.0@
+ * @since CUPS 2.0/OS 10.10@
*/
int /* O - 1 on success, 0 on failure */
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
return (0);
}
-
- snprintf(crtfile, sizeof(crtfile), "%s/%s.crt", path, common_name);
- snprintf(keyfile, sizeof(keyfile), "%s/%s.key", path, common_name);
+
+ http_gnutls_make_path(crtfile, sizeof(crtfile), path, common_name, "crt");
+ http_gnutls_make_path(keyfile, sizeof(keyfile), path, common_name, "key");
/*
* Create the encryption key...
* Note: The server credentials are used by all threads in the running process.
* This function is threadsafe.
*
- * @since CUPS 2.0@
+ * @since CUPS 2.0/OS 10.10@
*/
int /* O - 1 on success, 0 on failure */
http_t *http, /* I - Connection to server */
cups_array_t **credentials) /* O - Array of credentials */
{
+ unsigned count; /* Number of certificates */
+ const gnutls_datum_t *certs; /* Certificates */
+
+
+ DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials));
+
if (credentials)
*credentials = NULL;
if (!http || !http->tls || !credentials)
return (-1);
+ *credentials = cupsArrayNew(NULL, NULL);
+ certs = gnutls_certificate_get_peers(http->tls, &count);
+
+ DEBUG_printf(("1httpCopyCredentials: certs=%p, count=%u", certs, count));
+
+ if (certs && count)
+ {
+ while (count > 0)
+ {
+ httpAddCredential(*credentials, certs->data, certs->size);
+ certs ++;
+ count --;
+ }
+ }
+
return (0);
}
/*
* 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name.
*
- * @since CUPS 2.0@
+ * @since CUPS 2.0/OS 10.10@
*/
int /* O - 1 if valid, 0 otherwise */
cups_array_t *credentials, /* I - Credentials */
const char *common_name) /* I - Name to check */
{
-#if 0
- char cert_name[256]; /* Certificate's common name (C string) */
- int valid = 1; /* Valid name? */
+ gnutls_x509_crt_t cert; /* Certificate */
+ int result = 0; /* Result */
- if ((secCert = http_cdsa_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL)
- return (0);
-
- /*
- * Compare the common names...
- */
-
- if ((cfcert_name = SecCertificateCopySubjectSummary(secCert)) == NULL)
+ cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials));
+ if (cert)
{
- /*
- * Can't get common name, cannot be valid...
- */
-
- valid = 0;
+ result = gnutls_x509_crt_check_hostname(cert, common_name) != 0;
+ gnutls_x509_crt_deinit(cert);
}
- else if (CFStringGetCString(cfcert_name, cert_name, sizeof(cert_name), kCFStringEncodingUTF8) &&
- _cups_strcasecmp(common_name, cert_name))
- {
- /*
- * Not an exact match for the common name, check for wildcard certs...
- */
-
- const char *domain = strchr(common_name, '.');
- /* Domain in common name */
- if (strncmp(cert_name, "*.", 2) || !domain || _cups_strcasecmp(domain, cert_name + 1))
- {
- /*
- * Not a wildcard match.
- */
-
- /* TODO: Check subject alternate names */
- valid = 0;
- }
- }
-
- if (cfcert_name)
- CFRelease(cfcert_name);
-
- CFRelease(secCert);
-
- return (valid);
-#else
- return (1);
-#endif /* 0 */
+ return (result);
}
/*
* 'httpCredentialsGetTrust()' - Return the trust of credentials.
*
- * @since CUPS 2.0@
+ * @since CUPS 2.0/OS 10.10@
*/
http_trust_t /* O - Level of trust */
{
http_trust_t trust = HTTP_TRUST_OK;
/* Trusted? */
-
-#if 0
+ gnutls_x509_crt_t cert; /* Certificate */
cups_array_t *tcreds = NULL; /* Trusted credentials */
_cups_globals_t *cg = _cupsGlobals();
/* Per-thread globals */
-#endif /* 0 */
if (!common_name)
return (HTTP_TRUST_UNKNOWN);
-#if 0
- if ((secCert = http_cdsa_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL)
+ if ((cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL)
return (HTTP_TRUST_UNKNOWN);
+ if (cg->any_root < 0)
+ _cupsSetDefaults();
+
/*
* Look this common name up in the default keychains...
*/
else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name))
trust = HTTP_TRUST_INVALID;
- if (!cg->expired_certs && !SecCertificateIsValid(secCert, CFAbsoluteTimeGetCurrent()))
- trust = HTTP_TRUST_EXPIRED;
- else if (!cg->any_root && cupsArrayCount(credentials) == 1)
+ if (trust == HTTP_TRUST_OK && !cg->expired_certs)
+ {
+ time_t curtime; /* Current date/time */
+
+ time(&curtime);
+ if (curtime < gnutls_x509_crt_get_activation_time(cert) ||
+ curtime > gnutls_x509_crt_get_expiration_time(cert))
+ trust = HTTP_TRUST_EXPIRED;
+ }
+
+ if (trust == HTTP_TRUST_OK && !cg->any_root && cupsArrayCount(credentials) == 1)
trust = HTTP_TRUST_INVALID;
- CFRelease(secCert);
-#endif /* 0 */
+ gnutls_x509_crt_deinit(cert);
return (trust);
}
/*
* 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials.
*
- * @since CUPS 2.0@
+ * @since CUPS 2.0/OS 10.10@
*/
time_t /* O - Expiration date of credentials */
httpCredentialsGetExpiration(
cups_array_t *credentials) /* I - Credentials */
{
-#if 0
- expiration = (time_t)(SecCertificateNotValidAfter(secCert) + kCFAbsoluteTimeIntervalSince1970);
+ gnutls_x509_crt_t cert; /* Certificate */
+ time_t result = 0; /* Result */
- return (expiration);
-#else
- return (INT_MAX);
-#endif /* 0 */
+
+ cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials));
+ if (cert)
+ {
+ result = gnutls_x509_crt_get_expiration_time(cert);
+ gnutls_x509_crt_deinit(cert);
+ }
+
+ return (result);
}
/*
* 'httpCredentialsString()' - Return a string representing the credentials.
*
- * @since CUPS 2.0@
+ * @since CUPS 2.0/OS 10.10@
*/
size_t /* O - Total size of credentials string */
char *buffer, /* I - Buffer or @code NULL@ */
size_t bufsize) /* I - Size of buffer */
{
+ http_credential_t *first; /* First certificate */
+ gnutls_x509_crt_t cert; /* Certificate */
+
+
DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize));
if (!buffer)
if (buffer && bufsize > 0)
*buffer = '\0';
-#if 0
if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL &&
- (secCert = http_cdsa_create_credential(first)) != NULL)
+ (cert = http_gnutls_create_credential(first)) != NULL)
{
- CFStringRef cf_name; /* CF common name string */
char name[256]; /* Common name associated with cert */
+ size_t namelen; /* Length of name */
time_t expiration; /* Expiration date of cert */
_cups_md5_state_t md5_state; /* MD5 state */
unsigned char md5_digest[16]; /* MD5 result */
- if ((cf_name = SecCertificateCopySubjectSummary(secCert)) != NULL)
- {
- CFStringGetCString(cf_name, name, (CFIndex)sizeof(name), kCFStringEncodingUTF8);
- CFRelease(cf_name);
- }
+ namelen = sizeof(name) - 1;
+ if (gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, name, &namelen) >= 0)
+ name[namelen] = '\0';
else
strlcpy(name, "unknown", sizeof(name));
- expiration = (time_t)(SecCertificateNotValidAfter(secCert) + kCFAbsoluteTimeIntervalSince1970);
+ expiration = gnutls_x509_crt_get_expiration_time(cert);
_cupsMD5Init(&md5_state);
_cupsMD5Append(&md5_state, first->data, (int)first->datalen);
snprintf(buffer, bufsize, "%s / %s / %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", name, httpGetDateString(expiration), md5_digest[0], md5_digest[1], md5_digest[2], md5_digest[3], md5_digest[4], md5_digest[5], md5_digest[6], md5_digest[7], md5_digest[8], md5_digest[9], md5_digest[10], md5_digest[11], md5_digest[12], md5_digest[13], md5_digest[14], md5_digest[15]);
- CFRelease(secCert);
+ gnutls_x509_crt_deinit(cert);
}
-#endif // 0
DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer));
/*
* 'httpLoadCredentials()' - Load X.509 credentials from a keychain file.
*
- * @since CUPS 2.0@
+ * @since CUPS 2.0/OS 10.10@
*/
int /* O - 0 on success, -1 on error */
cups_array_t **credentials, /* IO - Credentials */
const char *common_name) /* I - Common name for credentials */
{
- (void)path;
- (void)credentials;
- (void)common_name;
+ cups_file_t *fp; /* Certificate file */
+ char filename[1024], /* filename.crt */
+ temp[1024], /* Temporary string */
+ line[256]; /* Base64-encoded line */
+ unsigned char *data = NULL; /* Buffer for cert data */
+ size_t alloc_data = 0, /* Bytes allocated */
+ num_data = 0; /* Bytes used */
+ int decoded; /* Bytes decoded */
+
+
+ if (!credentials || !common_name)
+ return (-1);
+
+ if (!path)
+ path = http_gnutls_default_path(temp, sizeof(temp));
+ if (!path)
+ return (-1);
+
+ http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt");
+
+ if ((fp = cupsFileOpen(filename, "r")) == NULL)
+ return (-1);
+
+ while (cupsFileGets(fp, line, sizeof(line)))
+ {
+ if (!strcmp(line, "-----BEGIN CERTIFICATE-----"))
+ {
+ if (num_data)
+ {
+ /*
+ * Missing END CERTIFICATE...
+ */
+
+ httpFreeCredentials(*credentials);
+ *credentials = NULL;
+ break;
+ }
+ }
+ else if (!strcmp(line, "-----END CERTIFICATE-----"))
+ {
+ if (!num_data)
+ {
+ /*
+ * Missing data...
+ */
+
+ httpFreeCredentials(*credentials);
+ *credentials = NULL;
+ break;
+ }
+
+ if (!*credentials)
+ *credentials = cupsArrayNew(NULL, NULL);
+
+ if (httpAddCredential(*credentials, data, num_data))
+ {
+ httpFreeCredentials(*credentials);
+ *credentials = NULL;
+ break;
+ }
+
+ num_data = 0;
+ }
+ else
+ {
+ if (alloc_data == 0)
+ {
+ data = malloc(2048);
+ alloc_data = 2048;
+
+ if (!data)
+ break;
+ }
+ else if ((num_data + strlen(line)) >= alloc_data)
+ {
+ unsigned char *tdata = realloc(data, alloc_data + 1024);
+ /* Expanded buffer */
+
+ if (!tdata)
+ {
+ httpFreeCredentials(*credentials);
+ *credentials = NULL;
+ break;
+ }
+
+ data = tdata;
+ alloc_data += 1024;
+ }
- return (-1);
+ decoded = alloc_data - num_data;
+ httpDecode64_2((char *)data + num_data, &decoded, line);
+ num_data += (size_t)decoded;
+ }
+ }
+
+ cupsFileClose(fp);
+
+ if (num_data)
+ {
+ /*
+ * Missing END CERTIFICATE...
+ */
+
+ httpFreeCredentials(*credentials);
+ *credentials = NULL;
+ }
+
+ if (data)
+ free(data);
+
+ return (*credentials ? 0 : -1);
}
/*
* 'httpSaveCredentials()' - Save X.509 credentials to a keychain file.
*
- * @since CUPS 2.0@
+ * @since CUPS 2.0/OS 10.10@
*/
int /* O - -1 on error, 0 on success */
cups_array_t *credentials, /* I - Credentials */
const char *common_name) /* I - Common name for credentials */
{
- (void)path;
- (void)credentials;
- (void)common_name;
+ cups_file_t *fp; /* Certificate file */
+ char filename[1024], /* filename.crt */
+ nfilename[1024],/* filename.crt.N */
+ temp[1024], /* Temporary string */
+ line[256]; /* Base64-encoded line */
+ const unsigned char *ptr; /* Pointer into certificate */
+ ssize_t remaining; /* Bytes left */
+ http_credential_t *cred; /* Current credential */
+
+
+ if (!credentials || !common_name)
+ return (-1);
+
+ if (!path)
+ path = http_gnutls_default_path(temp, sizeof(temp));
+ if (!path)
+ return (-1);
+
+ http_gnutls_make_path(filename, sizeof(filename), path, common_name, "crt");
+ snprintf(nfilename, sizeof(nfilename), "%s.N", filename);
+
+ if ((fp = cupsFileOpen(nfilename, "w")) == NULL)
+ return (-1);
+
+ fchmod(cupsFileNumber(fp), 0600);
+
+ for (cred = (http_credential_t *)cupsArrayFirst(credentials);
+ cred;
+ cred = (http_credential_t *)cupsArrayNext(credentials))
+ {
+ cupsFilePuts(fp, "-----BEGIN CERTIFICATE-----\n");
+ for (ptr = cred->data, remaining = (ssize_t)cred->datalen; remaining > 0; remaining -= 45, ptr += 45)
+ {
+ httpEncode64_2(line, sizeof(line), (char *)ptr, remaining > 45 ? 45 : remaining);
+ cupsFilePrintf(fp, "%s\n", line);
+ }
+ cupsFilePuts(fp, "-----END CERTIFICATE-----\n");
+ }
+
+ cupsFileClose(fp);
+
+ return (rename(nfilename, filename));
+}
+
+
+/*
+ * 'http_gnutls_create_credential()' - Create a single credential in the internal format.
+ */
+
+static gnutls_x509_crt_t /* O - Certificate */
+http_gnutls_create_credential(
+ http_credential_t *credential) /* I - Credential */
+{
+ int result; /* Result from GNU TLS */
+ gnutls_x509_crt_t cert; /* Certificate */
+ gnutls_datum_t datum; /* Data record */
+
+
+ DEBUG_printf(("3http_gnutls_create_credential(credential=%p)", credential));
+
+ if (!credential)
+ return (NULL);
+
+ if ((result = gnutls_x509_crt_init(&cert)) < 0)
+ {
+ DEBUG_printf(("4http_gnutls_create_credential: init error: %s", gnutls_strerror(result)));
+ return (NULL);
+ }
+
+ datum.data = credential->data;
+ datum.size = credential->datalen;
+
+ if ((result = gnutls_x509_crt_import(cert, &datum, GNUTLS_X509_FMT_DER)) < 0)
+ {
+ DEBUG_printf(("4http_gnutls_create_credential: import error: %s", gnutls_strerror(result)));
+
+ gnutls_x509_crt_deinit(cert);
+ return (NULL);
+ }
- return (-1);
+ return (cert);
}
}
+/*
+ * 'http_gnutls_make_path()' - Format a filename for a certificate or key file.
+ */
+
+static const char * /* O - Filename */
+http_gnutls_make_path(
+ char *buffer, /* I - Filename buffer */
+ size_t bufsize, /* I - Size of buffer */
+ const char *dirname, /* I - Directory */
+ const char *filename, /* I - Filename (usually hostname) */
+ const char *ext) /* I - Extension */
+{
+ char *bufptr, /* Pointer into buffer */
+ *bufend = buffer + bufsize - 1; /* End of buffer */
+
+
+ snprintf(buffer, bufsize, "%s/", dirname);
+ bufptr = buffer + strlen(buffer);
+
+ while (*filename && bufptr < bufend)
+ {
+ if (_cups_isalnum(*filename) || *filename == '-' || *filename == '.')
+ *bufptr++ = *filename;
+ else
+ *bufptr++ = '_';
+
+ filename ++;
+ }
+
+ if (bufptr < bufend)
+ *bufptr++ = '.';
+
+ strlcpy(bufptr, ext, (size_t)(bufend - bufptr + 1));
+
+ return (buffer);
+}
+
+
/*
* 'http_gnutls_read()' - Read function for the GNU TLS library.
*/
}
+/*
+ * '_httpTLSSetOptions()' - Set TLS protocol and cipher suite options.
+ */
+
+void
+_httpTLSSetOptions(int options) /* I - Options */
+{
+ tls_options = options;
+}
+
+
/*
* '_httpTLSStart()' - Set up SSL/TLS support on a connection.
*/
int status; /* Status of handshake */
gnutls_certificate_credentials_t *credentials;
/* TLS credentials */
+ char priority_string[1024];
+ /* Priority string */
+
+ DEBUG_printf(("3_httpTLSStart(http=%p)", http));
- DEBUG_printf(("7_httpTLSStart(http=%p)", http));
+ if (tls_options < 0)
+ {
+ DEBUG_puts("4_httpTLSStart: Setting defaults.");
+ _cupsSetDefaults();
+ DEBUG_printf(("4_httpTLSStart: tls_options=%x", tls_options));
+ }
if (http->mode == _HTTP_MODE_SERVER && !tls_keypath)
{
keyfile[1024]; /* Private key file */
int have_creds = 0; /* Have credentials? */
-
if (http->fields[HTTP_FIELD_HOST][0])
{
/*
if (hostname[0])
{
- snprintf(crtfile, sizeof(crtfile), "%s/%s.crt", tls_keypath, hostname);
- snprintf(keyfile, sizeof(keyfile), "%s/%s.key", tls_keypath, hostname);
+ http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, hostname, "crt");
+ http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, hostname, "key");
have_creds = !access(crtfile, 0) && !access(keyfile, 0);
}
else if (tls_common_name)
{
- snprintf(crtfile, sizeof(crtfile), "%s/%s.crt", tls_keypath, tls_common_name);
- snprintf(keyfile, sizeof(keyfile), "%s/%s.key", tls_keypath, tls_common_name);
+ http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, tls_common_name, "crt");
+ http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, tls_common_name, "key");
have_creds = !access(crtfile, 0) && !access(keyfile, 0);
}
return (-1);
}
+ strlcpy(priority_string, "NORMAL", sizeof(priority_string));
+
+ if (tls_options & _HTTP_TLS_DENY_TLS10)
+ strlcat(priority_string, ":+VERS-TLS-ALL:-VERS-TLS1.0:-VERS-SSL3.0", sizeof(priority_string));
+ else if (tls_options & _HTTP_TLS_ALLOW_SSL3)
+ strlcat(priority_string, ":+VERS-TLS-ALL", sizeof(priority_string));
+ else
+ strlcat(priority_string, ":+VERS-TLS-ALL:-VERS-SSL3.0", sizeof(priority_string));
+
+ if (!(tls_options & _HTTP_TLS_ALLOW_RC4))
+ strlcat(priority_string, ":-ARCFOUR-128", sizeof(priority_string));
+
+ if (!(tls_options & _HTTP_TLS_ALLOW_DH))
+ strlcat(priority_string, ":!ANON-DH", sizeof(priority_string));
+
+#ifdef HAVE_GNUTLS_PRIORITY_SET_DIRECT
+ gnutls_priority_set_direct(http->tls, priority_string, NULL);
+
+#else
+ gnutls_priority_t priority; /* Priority */
+
+ gnutls_priority_init(&priority, priority_string, NULL);
+ gnutls_priority_set(http->tls, priority);
+ gnutls_priority_deinit(priority);
+#endif /* HAVE_GNUTLS_PRIORITY_SET_DIRECT */
+
gnutls_transport_set_ptr(http->tls, (gnutls_transport_ptr_t)http);
gnutls_transport_set_pull_function(http->tls, http_gnutls_read);
+#ifdef HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION
gnutls_transport_set_pull_timeout_function(http->tls, (gnutls_pull_timeout_func)httpWait);
+#endif /* HAVE_GNUTLS_TRANSPORT_SET_PULL_TIMEOUT_FUNCTION */
gnutls_transport_set_push_function(http->tls, http_gnutls_write);
while ((status = gnutls_handshake(http->tls)) != GNUTLS_E_SUCCESS)
http->tls_credentials = credentials;
- // TODO: Put this in the right place; no-op for now, this to get things to compile
-// http_tls_set_credentials(http);
-
return (0);
}
return ((int)result);
}
-
-
-/*
- * End of "$Id$".
- */
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