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1635 lines
43 KiB
1635 lines
43 KiB
/* |
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* TLS support code for CUPS using GNU TLS. |
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* |
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* Copyright 2007-2016 by Apple Inc. |
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* Copyright 1997-2007 by Easy Software Products, all rights reserved. |
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* |
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* These coded instructions, statements, and computer programs are the |
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* property of Apple Inc. and are protected by Federal copyright |
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* law. Distribution and use rights are outlined in the file "LICENSE.txt" |
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* which should have been included with this file. If this file is |
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* missing or damaged, see the license at "http://www.cups.org/". |
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* |
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* This file is subject to the Apple OS-Developed Software exception. |
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*/ |
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|
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/**** This file is included from tls.c ****/ |
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|
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/* |
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* Include necessary headers... |
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*/ |
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|
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#include <sys/stat.h> |
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|
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/* |
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* Local globals... |
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*/ |
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static int tls_auto_create = 0; |
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/* Auto-create self-signed certs? */ |
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static char *tls_common_name = NULL; |
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/* Default common name */ |
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static gnutls_x509_crl_t tls_crl = NULL;/* Certificate revocation list */ |
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static char *tls_keypath = NULL; |
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/* Server cert keychain path */ |
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static _cups_mutex_t tls_mutex = _CUPS_MUTEX_INITIALIZER; |
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/* Mutex for keychain/certs */ |
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static int tls_options = -1;/* Options for TLS connections */ |
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/* |
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* Local functions... |
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*/ |
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|
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static gnutls_x509_crt_t http_gnutls_create_credential(http_credential_t *credential); |
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static const char *http_gnutls_default_path(char *buffer, size_t bufsize); |
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static void http_gnutls_load_crl(void); |
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static const char *http_gnutls_make_path(char *buffer, size_t bufsize, const char *dirname, const char *filename, const char *ext); |
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static ssize_t http_gnutls_read(gnutls_transport_ptr_t ptr, void *data, size_t length); |
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static ssize_t http_gnutls_write(gnutls_transport_ptr_t ptr, const void *data, size_t length); |
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/* |
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* 'cupsMakeServerCredentials()' - Make a self-signed certificate and private key pair. |
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* |
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* @since CUPS 2.0/OS 10.10@ |
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*/ |
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|
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int /* O - 1 on success, 0 on failure */ |
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cupsMakeServerCredentials( |
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const char *path, /* I - Path to keychain/directory */ |
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const char *common_name, /* I - Common name */ |
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int num_alt_names, /* I - Number of subject alternate names */ |
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const char **alt_names, /* I - Subject Alternate Names */ |
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time_t expiration_date) /* I - Expiration date */ |
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{ |
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gnutls_x509_crt_t crt; /* Self-signed certificate */ |
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gnutls_x509_privkey_t key; /* Encryption private key */ |
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char temp[1024], /* Temporary directory name */ |
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crtfile[1024], /* Certificate filename */ |
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keyfile[1024]; /* Private key filename */ |
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cups_lang_t *language; /* Default language info */ |
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cups_file_t *fp; /* Key/cert file */ |
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unsigned char buffer[8192]; /* Buffer for x509 data */ |
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size_t bytes; /* Number of bytes of data */ |
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unsigned char serial[4]; /* Serial number buffer */ |
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time_t curtime; /* Current time */ |
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int result; /* Result of GNU TLS calls */ |
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DEBUG_printf(("cupsMakeServerCredentials(path=\"%s\", common_name=\"%s\", num_alt_names=%d, alt_names=%p, expiration_date=%d)", path, common_name, num_alt_names, alt_names, (int)expiration_date)); |
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/* |
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* Filenames... |
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*/ |
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if (!path) |
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path = http_gnutls_default_path(temp, sizeof(temp)); |
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|
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if (!path || !common_name) |
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{ |
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_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); |
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return (0); |
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} |
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http_gnutls_make_path(crtfile, sizeof(crtfile), path, common_name, "crt"); |
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http_gnutls_make_path(keyfile, sizeof(keyfile), path, common_name, "key"); |
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/* |
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* Create the encryption key... |
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*/ |
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DEBUG_puts("1cupsMakeServerCredentials: Creating key pair."); |
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gnutls_x509_privkey_init(&key); |
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gnutls_x509_privkey_generate(key, GNUTLS_PK_RSA, 2048, 0); |
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DEBUG_puts("1cupsMakeServerCredentials: Key pair created."); |
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/* |
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* Save it... |
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*/ |
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bytes = sizeof(buffer); |
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if ((result = gnutls_x509_privkey_export(key, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) |
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{ |
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DEBUG_printf(("1cupsMakeServerCredentials: Unable to export private key: %s", gnutls_strerror(result))); |
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_cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); |
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gnutls_x509_privkey_deinit(key); |
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return (0); |
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} |
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else if ((fp = cupsFileOpen(keyfile, "w")) != NULL) |
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{ |
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DEBUG_printf(("1cupsMakeServerCredentials: Writing private key to \"%s\".", keyfile)); |
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cupsFileWrite(fp, (char *)buffer, bytes); |
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cupsFileClose(fp); |
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} |
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else |
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{ |
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DEBUG_printf(("1cupsMakeServerCredentials: Unable to create private key file \"%s\": %s", keyfile, strerror(errno))); |
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_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
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gnutls_x509_privkey_deinit(key); |
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return (0); |
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} |
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/* |
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* Create the self-signed certificate... |
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*/ |
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DEBUG_puts("1cupsMakeServerCredentials: Generating self-signed X.509 certificate."); |
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language = cupsLangDefault(); |
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curtime = time(NULL); |
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serial[0] = curtime >> 24; |
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serial[1] = curtime >> 16; |
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serial[2] = curtime >> 8; |
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serial[3] = curtime; |
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gnutls_x509_crt_init(&crt); |
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if (strlen(language->language) == 5) |
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gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, |
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language->language + 3, 2); |
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else |
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gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COUNTRY_NAME, 0, |
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"US", 2); |
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gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0, |
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common_name, strlen(common_name)); |
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gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATION_NAME, 0, |
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common_name, strlen(common_name)); |
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gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_ORGANIZATIONAL_UNIT_NAME, |
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0, "Unknown", 7); |
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gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_STATE_OR_PROVINCE_NAME, 0, |
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"Unknown", 7); |
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gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_X520_LOCALITY_NAME, 0, |
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"Unknown", 7); |
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/* gnutls_x509_crt_set_dn_by_oid(crt, GNUTLS_OID_PKCS9_EMAIL, 0, |
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ServerAdmin, strlen(ServerAdmin));*/ |
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gnutls_x509_crt_set_key(crt, key); |
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gnutls_x509_crt_set_serial(crt, serial, sizeof(serial)); |
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gnutls_x509_crt_set_activation_time(crt, curtime); |
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gnutls_x509_crt_set_expiration_time(crt, curtime + 10 * 365 * 86400); |
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gnutls_x509_crt_set_ca_status(crt, 0); |
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if (num_alt_names > 0) |
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gnutls_x509_crt_set_subject_alternative_name(crt, GNUTLS_SAN_DNSNAME, alt_names[0]); |
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gnutls_x509_crt_set_key_purpose_oid(crt, GNUTLS_KP_TLS_WWW_SERVER, 0); |
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gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_KEY_ENCIPHERMENT); |
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gnutls_x509_crt_set_version(crt, 3); |
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bytes = sizeof(buffer); |
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if (gnutls_x509_crt_get_key_id(crt, 0, buffer, &bytes) >= 0) |
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gnutls_x509_crt_set_subject_key_id(crt, buffer, bytes); |
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gnutls_x509_crt_sign(crt, crt, key); |
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/* |
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* Save it... |
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*/ |
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bytes = sizeof(buffer); |
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if ((result = gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, buffer, &bytes)) < 0) |
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{ |
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DEBUG_printf(("1cupsMakeServerCredentials: Unable to export public key and X.509 certificate: %s", gnutls_strerror(result))); |
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_cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(result), 0); |
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gnutls_x509_crt_deinit(crt); |
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gnutls_x509_privkey_deinit(key); |
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return (0); |
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} |
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else if ((fp = cupsFileOpen(crtfile, "w")) != NULL) |
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{ |
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DEBUG_printf(("1cupsMakeServerCredentials: Writing public key and X.509 certificate to \"%s\".", crtfile)); |
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cupsFileWrite(fp, (char *)buffer, bytes); |
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cupsFileClose(fp); |
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} |
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else |
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{ |
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DEBUG_printf(("1cupsMakeServerCredentials: Unable to create public key and X.509 certificate file \"%s\": %s", crtfile, strerror(errno))); |
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_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); |
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gnutls_x509_crt_deinit(crt); |
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gnutls_x509_privkey_deinit(key); |
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return (0); |
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} |
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/* |
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* Cleanup... |
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*/ |
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gnutls_x509_crt_deinit(crt); |
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gnutls_x509_privkey_deinit(key); |
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DEBUG_puts("1cupsMakeServerCredentials: Successfully created credentials."); |
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return (1); |
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} |
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/* |
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* 'cupsSetServerCredentials()' - Set the default server credentials. |
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* |
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* Note: The server credentials are used by all threads in the running process. |
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* This function is threadsafe. |
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* |
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* @since CUPS 2.0/OS 10.10@ |
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*/ |
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|
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int /* O - 1 on success, 0 on failure */ |
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cupsSetServerCredentials( |
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const char *path, /* I - Path to keychain/directory */ |
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const char *common_name, /* I - Default common name for server */ |
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int auto_create) /* I - 1 = automatically create self-signed certificates */ |
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{ |
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char temp[1024]; /* Default path buffer */ |
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DEBUG_printf(("cupsSetServerCredentials(path=\"%s\", common_name=\"%s\", auto_create=%d)", path, common_name, auto_create)); |
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/* |
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* Use defaults as needed... |
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*/ |
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|
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if (!path) |
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path = http_gnutls_default_path(temp, sizeof(temp)); |
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|
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/* |
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* Range check input... |
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*/ |
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|
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if (!path || !common_name) |
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{ |
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_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); |
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return (0); |
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} |
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|
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_cupsMutexLock(&tls_mutex); |
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|
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/* |
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* Free old values... |
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*/ |
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|
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if (tls_keypath) |
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_cupsStrFree(tls_keypath); |
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|
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if (tls_common_name) |
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_cupsStrFree(tls_common_name); |
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/* |
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* Save the new values... |
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*/ |
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|
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tls_keypath = _cupsStrAlloc(path); |
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tls_auto_create = auto_create; |
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tls_common_name = _cupsStrAlloc(common_name); |
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_cupsMutexUnlock(&tls_mutex); |
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return (1); |
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} |
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|
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/* |
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* 'httpCopyCredentials()' - Copy the credentials associated with the peer in |
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* an encrypted connection. |
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* |
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* @since CUPS 1.5/macOS 10.7@ |
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*/ |
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|
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int /* O - Status of call (0 = success) */ |
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httpCopyCredentials( |
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http_t *http, /* I - Connection to server */ |
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cups_array_t **credentials) /* O - Array of credentials */ |
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{ |
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unsigned count; /* Number of certificates */ |
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const gnutls_datum_t *certs; /* Certificates */ |
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DEBUG_printf(("httpCopyCredentials(http=%p, credentials=%p)", http, credentials)); |
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|
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if (credentials) |
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*credentials = NULL; |
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|
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if (!http || !http->tls || !credentials) |
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return (-1); |
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|
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*credentials = cupsArrayNew(NULL, NULL); |
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certs = gnutls_certificate_get_peers(http->tls, &count); |
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DEBUG_printf(("1httpCopyCredentials: certs=%p, count=%u", certs, count)); |
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|
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if (certs && count) |
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{ |
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while (count > 0) |
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{ |
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httpAddCredential(*credentials, certs->data, certs->size); |
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certs ++; |
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count --; |
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} |
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} |
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|
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return (0); |
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} |
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|
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|
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/* |
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* '_httpCreateCredentials()' - Create credentials in the internal format. |
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*/ |
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|
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http_tls_credentials_t /* O - Internal credentials */ |
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_httpCreateCredentials( |
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cups_array_t *credentials) /* I - Array of credentials */ |
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{ |
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(void)credentials; |
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|
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return (NULL); |
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} |
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|
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|
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/* |
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* '_httpFreeCredentials()' - Free internal credentials. |
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*/ |
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|
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void |
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_httpFreeCredentials( |
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http_tls_credentials_t credentials) /* I - Internal credentials */ |
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{ |
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(void)credentials; |
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} |
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|
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/* |
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* 'httpCredentialsAreValidForName()' - Return whether the credentials are valid for the given name. |
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* |
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* @since CUPS 2.0/OS 10.10@ |
|
*/ |
|
|
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int /* O - 1 if valid, 0 otherwise */ |
|
httpCredentialsAreValidForName( |
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cups_array_t *credentials, /* I - Credentials */ |
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const char *common_name) /* I - Name to check */ |
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{ |
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gnutls_x509_crt_t cert; /* Certificate */ |
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int result = 0; /* Result */ |
|
|
|
|
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cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials)); |
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if (cert) |
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{ |
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result = gnutls_x509_crt_check_hostname(cert, common_name) != 0; |
|
|
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if (result) |
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{ |
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int i, /* Looping var */ |
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count; /* Number of revoked certificates */ |
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unsigned char cserial[1024], /* Certificate serial number */ |
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rserial[1024]; /* Revoked serial number */ |
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size_t cserial_size, /* Size of cert serial number */ |
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rserial_size; /* Size of revoked serial number */ |
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_cupsMutexLock(&tls_mutex); |
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|
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count = gnutls_x509_crl_get_crt_count(tls_crl); |
|
|
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if (count > 0) |
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{ |
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cserial_size = sizeof(cserial); |
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gnutls_x509_crt_get_serial(cert, cserial, &cserial_size); |
|
|
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for (i = 0; i < count; i ++) |
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{ |
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rserial_size = sizeof(rserial); |
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if (!gnutls_x509_crl_get_crt_serial(tls_crl, i, rserial, &rserial_size, NULL) && cserial_size == rserial_size && !memcmp(cserial, rserial, rserial_size)) |
|
{ |
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result = 0; |
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break; |
|
} |
|
} |
|
} |
|
|
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_cupsMutexUnlock(&tls_mutex); |
|
} |
|
|
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gnutls_x509_crt_deinit(cert); |
|
} |
|
|
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return (result); |
|
} |
|
|
|
|
|
/* |
|
* 'httpCredentialsGetTrust()' - Return the trust of credentials. |
|
* |
|
* @since CUPS 2.0/OS 10.10@ |
|
*/ |
|
|
|
http_trust_t /* O - Level of trust */ |
|
httpCredentialsGetTrust( |
|
cups_array_t *credentials, /* I - Credentials */ |
|
const char *common_name) /* I - Common name for trust lookup */ |
|
{ |
|
http_trust_t trust = HTTP_TRUST_OK; |
|
/* Trusted? */ |
|
gnutls_x509_crt_t cert; /* Certificate */ |
|
cups_array_t *tcreds = NULL; /* Trusted credentials */ |
|
_cups_globals_t *cg = _cupsGlobals(); |
|
/* Per-thread globals */ |
|
|
|
|
|
if (!common_name) |
|
{ |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No common name specified."), 1); |
|
return (HTTP_TRUST_UNKNOWN); |
|
} |
|
|
|
if ((cert = http_gnutls_create_credential((http_credential_t *)cupsArrayFirst(credentials))) == NULL) |
|
{ |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create credentials from array."), 1); |
|
return (HTTP_TRUST_UNKNOWN); |
|
} |
|
|
|
if (cg->any_root < 0) |
|
{ |
|
_cupsSetDefaults(); |
|
http_gnutls_load_crl(); |
|
} |
|
|
|
/* |
|
* Look this common name up in the default keychains... |
|
*/ |
|
|
|
httpLoadCredentials(NULL, &tcreds, common_name); |
|
|
|
if (tcreds) |
|
{ |
|
char credentials_str[1024], /* String for incoming credentials */ |
|
tcreds_str[1024]; /* String for saved credentials */ |
|
|
|
httpCredentialsString(credentials, credentials_str, sizeof(credentials_str)); |
|
httpCredentialsString(tcreds, tcreds_str, sizeof(tcreds_str)); |
|
|
|
if (strcmp(credentials_str, tcreds_str)) |
|
{ |
|
/* |
|
* Credentials don't match, let's look at the expiration date of the new |
|
* credentials and allow if the new ones have a later expiration... |
|
*/ |
|
|
|
if (!cg->trust_first) |
|
{ |
|
/* |
|
* Do not trust certificates on first use... |
|
*/ |
|
|
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Trust on first use is disabled."), 1); |
|
|
|
trust = HTTP_TRUST_INVALID; |
|
} |
|
else if (httpCredentialsGetExpiration(credentials) <= httpCredentialsGetExpiration(tcreds)) |
|
{ |
|
/* |
|
* The new credentials are not newly issued... |
|
*/ |
|
|
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("New credentials are older than stored credentials."), 1); |
|
|
|
trust = HTTP_TRUST_INVALID; |
|
} |
|
else if (!httpCredentialsAreValidForName(credentials, common_name)) |
|
{ |
|
/* |
|
* The common name does not match the issued certificate... |
|
*/ |
|
|
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("New credentials are not valid for name."), 1); |
|
|
|
trust = HTTP_TRUST_INVALID; |
|
} |
|
else if (httpCredentialsGetExpiration(tcreds) < time(NULL)) |
|
{ |
|
/* |
|
* Save the renewed credentials... |
|
*/ |
|
|
|
trust = HTTP_TRUST_RENEWED; |
|
|
|
httpSaveCredentials(NULL, credentials, common_name); |
|
} |
|
} |
|
|
|
httpFreeCredentials(tcreds); |
|
} |
|
else if (cg->validate_certs && !httpCredentialsAreValidForName(credentials, common_name)) |
|
{ |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No stored credentials, not valid for name."), 1); |
|
trust = HTTP_TRUST_INVALID; |
|
} |
|
else if (!cg->trust_first) |
|
{ |
|
/* |
|
* See if we have a site CA certificate we can compare... |
|
*/ |
|
|
|
if (!httpLoadCredentials(NULL, &tcreds, "site")) |
|
{ |
|
if (cupsArrayCount(credentials) != (cupsArrayCount(tcreds) + 1)) |
|
{ |
|
/* |
|
* Certificate isn't directly generated from the CA cert... |
|
*/ |
|
|
|
trust = HTTP_TRUST_INVALID; |
|
} |
|
else |
|
{ |
|
/* |
|
* Do a tail comparison of the two certificates... |
|
*/ |
|
|
|
http_credential_t *a, *b; /* Certificates */ |
|
|
|
for (a = (http_credential_t *)cupsArrayFirst(tcreds), b = (http_credential_t *)cupsArrayIndex(credentials, 1); |
|
a && b; |
|
a = (http_credential_t *)cupsArrayNext(tcreds), b = (http_credential_t *)cupsArrayNext(credentials)) |
|
if (a->datalen != b->datalen || memcmp(a->data, b->data, a->datalen)) |
|
break; |
|
|
|
if (a || b) |
|
trust = HTTP_TRUST_INVALID; |
|
} |
|
|
|
if (trust != HTTP_TRUST_OK) |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Credentials do not validate against site CA certificate."), 1); |
|
} |
|
else |
|
{ |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Trust on first use is disabled."), 1); |
|
trust = HTTP_TRUST_INVALID; |
|
} |
|
} |
|
|
|
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)) |
|
{ |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Credentials have expired."), 1); |
|
trust = HTTP_TRUST_EXPIRED; |
|
} |
|
} |
|
|
|
if (trust == HTTP_TRUST_OK && !cg->any_root && cupsArrayCount(credentials) == 1) |
|
{ |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Self-signed credentials are blocked."), 1); |
|
trust = HTTP_TRUST_INVALID; |
|
} |
|
|
|
gnutls_x509_crt_deinit(cert); |
|
|
|
return (trust); |
|
} |
|
|
|
|
|
/* |
|
* 'httpCredentialsGetExpiration()' - Return the expiration date of the credentials. |
|
* |
|
* @since CUPS 2.0/OS 10.10@ |
|
*/ |
|
|
|
time_t /* O - Expiration date of credentials */ |
|
httpCredentialsGetExpiration( |
|
cups_array_t *credentials) /* I - Credentials */ |
|
{ |
|
gnutls_x509_crt_t cert; /* Certificate */ |
|
time_t result = 0; /* Result */ |
|
|
|
|
|
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/OS 10.10@ |
|
*/ |
|
|
|
size_t /* O - Total size of credentials string */ |
|
httpCredentialsString( |
|
cups_array_t *credentials, /* I - Credentials */ |
|
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) |
|
return (0); |
|
|
|
if (buffer && bufsize > 0) |
|
*buffer = '\0'; |
|
|
|
if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL && |
|
(cert = http_gnutls_create_credential(first)) != NULL) |
|
{ |
|
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 */ |
|
|
|
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 = gnutls_x509_crt_get_expiration_time(cert); |
|
|
|
_cupsMD5Init(&md5_state); |
|
_cupsMD5Append(&md5_state, first->data, (int)first->datalen); |
|
_cupsMD5Finish(&md5_state, md5_digest); |
|
|
|
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]); |
|
|
|
gnutls_x509_crt_deinit(cert); |
|
} |
|
|
|
DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer)); |
|
|
|
return (strlen(buffer)); |
|
} |
|
|
|
|
|
/* |
|
* 'httpLoadCredentials()' - Load X.509 credentials from a keychain file. |
|
* |
|
* @since CUPS 2.0/OS 10.10@ |
|
*/ |
|
|
|
int /* O - 0 on success, -1 on error */ |
|
httpLoadCredentials( |
|
const char *path, /* I - Keychain/PKCS#12 path */ |
|
cups_array_t **credentials, /* IO - Credentials */ |
|
const char *common_name) /* I - Common name for credentials */ |
|
{ |
|
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 */ |
|
int in_certificate = 0; |
|
/* In a certificate? */ |
|
|
|
|
|
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 (in_certificate) |
|
{ |
|
/* |
|
* Missing END CERTIFICATE... |
|
*/ |
|
|
|
httpFreeCredentials(*credentials); |
|
*credentials = NULL; |
|
break; |
|
} |
|
|
|
in_certificate = 1; |
|
} |
|
else if (!strcmp(line, "-----END CERTIFICATE-----")) |
|
{ |
|
if (!in_certificate || !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; |
|
in_certificate = 0; |
|
} |
|
else if (in_certificate) |
|
{ |
|
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; |
|
} |
|
|
|
decoded = alloc_data - num_data; |
|
httpDecode64_2((char *)data + num_data, &decoded, line); |
|
num_data += (size_t)decoded; |
|
} |
|
} |
|
|
|
cupsFileClose(fp); |
|
|
|
if (in_certificate) |
|
{ |
|
/* |
|
* 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/OS 10.10@ |
|
*/ |
|
|
|
int /* O - -1 on error, 0 on success */ |
|
httpSaveCredentials( |
|
const char *path, /* I - Keychain/PKCS#12 path */ |
|
cups_array_t *credentials, /* I - Credentials */ |
|
const char *common_name) /* I - Common name for credentials */ |
|
{ |
|
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 (cert); |
|
} |
|
|
|
|
|
/* |
|
* 'http_gnutls_default_path()' - Get the default credential store path. |
|
*/ |
|
|
|
static const char * /* O - Path or NULL on error */ |
|
http_gnutls_default_path(char *buffer,/* I - Path buffer */ |
|
size_t bufsize)/* I - Size of path buffer */ |
|
{ |
|
const char *home = getenv("HOME"); /* HOME environment variable */ |
|
|
|
|
|
if (getuid() && home) |
|
{ |
|
snprintf(buffer, bufsize, "%s/.cups", home); |
|
if (access(buffer, 0)) |
|
{ |
|
DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); |
|
if (mkdir(buffer, 0700)) |
|
{ |
|
DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); |
|
return (NULL); |
|
} |
|
} |
|
|
|
snprintf(buffer, bufsize, "%s/.cups/ssl", home); |
|
if (access(buffer, 0)) |
|
{ |
|
DEBUG_printf(("1http_gnutls_default_path: Making directory \"%s\".", buffer)); |
|
if (mkdir(buffer, 0700)) |
|
{ |
|
DEBUG_printf(("1http_gnutls_default_path: Failed to make directory: %s", strerror(errno))); |
|
return (NULL); |
|
} |
|
} |
|
} |
|
else |
|
strlcpy(buffer, CUPS_SERVERROOT "/ssl", bufsize); |
|
|
|
DEBUG_printf(("1http_gnutls_default_path: Using default path \"%s\".", buffer)); |
|
|
|
return (buffer); |
|
} |
|
|
|
|
|
/* |
|
* 'http_gnutls_load_crl()' - Load the certificate revocation list, if any. |
|
*/ |
|
|
|
static void |
|
http_gnutls_load_crl(void) |
|
{ |
|
_cupsMutexLock(&tls_mutex); |
|
|
|
if (!gnutls_x509_crl_init(&tls_crl)) |
|
{ |
|
cups_file_t *fp; /* CRL file */ |
|
char filename[1024], /* site.crl */ |
|
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 */ |
|
gnutls_datum_t datum; /* Data record */ |
|
|
|
|
|
http_gnutls_make_path(filename, sizeof(filename), CUPS_SERVERROOT, "site", "crl"); |
|
|
|
if ((fp = cupsFileOpen(filename, "r")) != NULL) |
|
{ |
|
while (cupsFileGets(fp, line, sizeof(line))) |
|
{ |
|
if (!strcmp(line, "-----BEGIN X509 CRL-----")) |
|
{ |
|
if (num_data) |
|
{ |
|
/* |
|
* Missing END X509 CRL... |
|
*/ |
|
|
|
break; |
|
} |
|
} |
|
else if (!strcmp(line, "-----END X509 CRL-----")) |
|
{ |
|
if (!num_data) |
|
{ |
|
/* |
|
* Missing data... |
|
*/ |
|
|
|
break; |
|
} |
|
|
|
datum.data = data; |
|
datum.size = num_data; |
|
|
|
gnutls_x509_crl_import(tls_crl, &datum, GNUTLS_X509_FMT_PEM); |
|
|
|
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) |
|
break; |
|
|
|
data = tdata; |
|
alloc_data += 1024; |
|
} |
|
|
|
decoded = alloc_data - num_data; |
|
httpDecode64_2((char *)data + num_data, &decoded, line); |
|
num_data += (size_t)decoded; |
|
} |
|
} |
|
|
|
cupsFileClose(fp); |
|
|
|
if (data) |
|
free(data); |
|
} |
|
} |
|
|
|
_cupsMutexUnlock(&tls_mutex); |
|
} |
|
|
|
|
|
/* |
|
* '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. |
|
*/ |
|
|
|
static ssize_t /* O - Number of bytes read or -1 on error */ |
|
http_gnutls_read( |
|
gnutls_transport_ptr_t ptr, /* I - Connection to server */ |
|
void *data, /* I - Buffer */ |
|
size_t length) /* I - Number of bytes to read */ |
|
{ |
|
http_t *http; /* HTTP connection */ |
|
ssize_t bytes; /* Bytes read */ |
|
|
|
|
|
DEBUG_printf(("6http_gnutls_read(ptr=%p, data=%p, length=%d)", ptr, data, (int)length)); |
|
|
|
http = (http_t *)ptr; |
|
|
|
if (!http->blocking) |
|
{ |
|
/* |
|
* Make sure we have data before we read... |
|
*/ |
|
|
|
while (!_httpWait(http, http->wait_value, 0)) |
|
{ |
|
if (http->timeout_cb && (*http->timeout_cb)(http, http->timeout_data)) |
|
continue; |
|
|
|
http->error = ETIMEDOUT; |
|
return (-1); |
|
} |
|
} |
|
|
|
bytes = recv(http->fd, data, length, 0); |
|
DEBUG_printf(("6http_gnutls_read: bytes=%d", (int)bytes)); |
|
return (bytes); |
|
} |
|
|
|
|
|
/* |
|
* 'http_gnutls_write()' - Write function for the GNU TLS library. |
|
*/ |
|
|
|
static ssize_t /* O - Number of bytes written or -1 on error */ |
|
http_gnutls_write( |
|
gnutls_transport_ptr_t ptr, /* I - Connection to server */ |
|
const void *data, /* I - Data buffer */ |
|
size_t length) /* I - Number of bytes to write */ |
|
{ |
|
ssize_t bytes; /* Bytes written */ |
|
|
|
|
|
DEBUG_printf(("6http_gnutls_write(ptr=%p, data=%p, length=%d)", ptr, data, |
|
(int)length)); |
|
bytes = send(((http_t *)ptr)->fd, data, length, 0); |
|
DEBUG_printf(("http_gnutls_write: bytes=%d", (int)bytes)); |
|
|
|
return (bytes); |
|
} |
|
|
|
|
|
/* |
|
* '_httpTLSInitialize()' - Initialize the TLS stack. |
|
*/ |
|
|
|
void |
|
_httpTLSInitialize(void) |
|
{ |
|
/* |
|
* Initialize GNU TLS... |
|
*/ |
|
|
|
gnutls_global_init(); |
|
} |
|
|
|
|
|
/* |
|
* '_httpTLSPending()' - Return the number of pending TLS-encrypted bytes. |
|
*/ |
|
|
|
size_t /* O - Bytes available */ |
|
_httpTLSPending(http_t *http) /* I - HTTP connection */ |
|
{ |
|
return (gnutls_record_check_pending(http->tls)); |
|
} |
|
|
|
|
|
/* |
|
* '_httpTLSRead()' - Read from a SSL/TLS connection. |
|
*/ |
|
|
|
int /* O - Bytes read */ |
|
_httpTLSRead(http_t *http, /* I - Connection to server */ |
|
char *buf, /* I - Buffer to store data */ |
|
int len) /* I - Length of buffer */ |
|
{ |
|
ssize_t result; /* Return value */ |
|
|
|
|
|
result = gnutls_record_recv(http->tls, buf, (size_t)len); |
|
|
|
if (result < 0 && !errno) |
|
{ |
|
/* |
|
* Convert GNU TLS error to errno value... |
|
*/ |
|
|
|
switch (result) |
|
{ |
|
case GNUTLS_E_INTERRUPTED : |
|
errno = EINTR; |
|
break; |
|
|
|
case GNUTLS_E_AGAIN : |
|
errno = EAGAIN; |
|
break; |
|
|
|
default : |
|
errno = EPIPE; |
|
break; |
|
} |
|
|
|
result = -1; |
|
} |
|
|
|
return ((int)result); |
|
} |
|
|
|
|
|
/* |
|
* '_httpTLSSetCredentials()' - Set the TLS credentials. |
|
*/ |
|
|
|
int /* O - Status of connection */ |
|
_httpTLSSetCredentials(http_t *http) /* I - Connection to server */ |
|
{ |
|
(void)http; |
|
|
|
return (0); |
|
} |
|
|
|
|
|
/* |
|
* '_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 /* O - 0 on success, -1 on failure */ |
|
_httpTLSStart(http_t *http) /* I - Connection to server */ |
|
{ |
|
char hostname[256], /* Hostname */ |
|
*hostptr; /* Pointer into hostname */ |
|
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)); |
|
|
|
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) |
|
{ |
|
DEBUG_puts("4_httpTLSStart: cupsSetServerCredentials not called."); |
|
http->error = errno = EINVAL; |
|
http->status = HTTP_STATUS_ERROR; |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Server credentials not set."), 1); |
|
|
|
return (-1); |
|
} |
|
|
|
credentials = (gnutls_certificate_credentials_t *) |
|
malloc(sizeof(gnutls_certificate_credentials_t)); |
|
if (credentials == NULL) |
|
{ |
|
DEBUG_printf(("8_httpStartTLS: Unable to allocate credentials: %s", |
|
strerror(errno))); |
|
http->error = errno; |
|
http->status = HTTP_STATUS_ERROR; |
|
_cupsSetHTTPError(HTTP_STATUS_ERROR); |
|
|
|
return (-1); |
|
} |
|
|
|
gnutls_certificate_allocate_credentials(credentials); |
|
status = gnutls_init(&http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_CLIENT : GNUTLS_SERVER); |
|
if (!status) |
|
status = gnutls_set_default_priority(http->tls); |
|
|
|
if (status) |
|
{ |
|
http->error = EIO; |
|
http->status = HTTP_STATUS_ERROR; |
|
|
|
DEBUG_printf(("4_httpTLSStart: Unable to initialize common TLS parameters: %s", gnutls_strerror(status))); |
|
_cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); |
|
|
|
gnutls_deinit(http->tls); |
|
gnutls_certificate_free_credentials(*credentials); |
|
free(credentials); |
|
http->tls = NULL; |
|
|
|
return (-1); |
|
} |
|
|
|
if (http->mode == _HTTP_MODE_CLIENT) |
|
{ |
|
/* |
|
* Client: get the hostname to use for TLS... |
|
*/ |
|
|
|
if (httpAddrLocalhost(http->hostaddr)) |
|
{ |
|
strlcpy(hostname, "localhost", sizeof(hostname)); |
|
} |
|
else |
|
{ |
|
/* |
|
* Otherwise make sure the hostname we have does not end in a trailing dot. |
|
*/ |
|
|
|
strlcpy(hostname, http->hostname, sizeof(hostname)); |
|
if ((hostptr = hostname + strlen(hostname) - 1) >= hostname && |
|
*hostptr == '.') |
|
*hostptr = '\0'; |
|
} |
|
|
|
status = gnutls_server_name_set(http->tls, GNUTLS_NAME_DNS, hostname, strlen(hostname)); |
|
} |
|
else |
|
{ |
|
/* |
|
* Server: get certificate and private key... |
|
*/ |
|
|
|
char crtfile[1024], /* Certificate file */ |
|
keyfile[1024]; /* Private key file */ |
|
int have_creds = 0; /* Have credentials? */ |
|
|
|
if (http->fields[HTTP_FIELD_HOST][0]) |
|
{ |
|
/* |
|
* Use hostname for TLS upgrade... |
|
*/ |
|
|
|
strlcpy(hostname, http->fields[HTTP_FIELD_HOST], sizeof(hostname)); |
|
} |
|
else |
|
{ |
|
/* |
|
* Resolve hostname from connection address... |
|
*/ |
|
|
|
http_addr_t addr; /* Connection address */ |
|
socklen_t addrlen; /* Length of address */ |
|
|
|
addrlen = sizeof(addr); |
|
if (getsockname(http->fd, (struct sockaddr *)&addr, &addrlen)) |
|
{ |
|
DEBUG_printf(("4_httpTLSStart: Unable to get socket address: %s", strerror(errno))); |
|
hostname[0] = '\0'; |
|
} |
|
else if (httpAddrLocalhost(&addr)) |
|
hostname[0] = '\0'; |
|
else |
|
{ |
|
httpAddrLookup(&addr, hostname, sizeof(hostname)); |
|
DEBUG_printf(("4_httpTLSStart: Resolved socket address to \"%s\".", hostname)); |
|
} |
|
} |
|
|
|
if (isdigit(hostname[0] & 255) || hostname[0] == '[') |
|
hostname[0] = '\0'; /* Don't allow numeric addresses */ |
|
|
|
if (hostname[0]) |
|
{ |
|
/* |
|
* First look in the CUPS keystore... |
|
*/ |
|
|
|
http_gnutls_make_path(crtfile, sizeof(crtfile), tls_keypath, hostname, "crt"); |
|
http_gnutls_make_path(keyfile, sizeof(keyfile), tls_keypath, hostname, "key"); |
|
|
|
if (access(crtfile, R_OK) || access(keyfile, R_OK)) |
|
{ |
|
/* |
|
* No CUPS-managed certs, look for CA certs... |
|
*/ |
|
|
|
char cacrtfile[1024], cakeyfile[1024]; /* CA cert files */ |
|
|
|
snprintf(cacrtfile, sizeof(cacrtfile), "/etc/letsencrypt/live/%s/fullchain.pem", hostname); |
|
snprintf(cakeyfile, sizeof(cakeyfile), "/etc/letsencrypt/live/%s/privkey.pem", hostname); |
|
|
|
if ((access(cacrtfile, R_OK) || access(cakeyfile, R_OK)) && (hostptr = strchr(hostname, '.')) != NULL) |
|
{ |
|
/* |
|
* Try just domain name... |
|
*/ |
|
|
|
hostptr ++; |
|
if (strchr(hostptr, '.')) |
|
{ |
|
snprintf(cacrtfile, sizeof(cacrtfile), "/etc/letsencrypt/live/%s/fullchain.pem", hostptr); |
|
snprintf(cakeyfile, sizeof(cakeyfile), "/etc/letsencrypt/live/%s/privkey.pem", hostptr); |
|
} |
|
} |
|
|
|
if (!access(cacrtfile, R_OK) && !access(cakeyfile, R_OK)) |
|
{ |
|
/* |
|
* Use the CA certs... |
|
*/ |
|
|
|
strlcpy(crtfile, cacrtfile, sizeof(crtfile)); |
|
strlcpy(keyfile, cakeyfile, sizeof(keyfile)); |
|
} |
|
} |
|
|
|
have_creds = !access(crtfile, R_OK) && !access(keyfile, R_OK); |
|
} |
|
else if (tls_common_name) |
|
{ |
|
/* |
|
* First look in the CUPS keystore... |
|
*/ |
|
|
|
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"); |
|
|
|
if (access(crtfile, R_OK) || access(keyfile, R_OK)) |
|
{ |
|
/* |
|
* No CUPS-managed certs, look for CA certs... |
|
*/ |
|
|
|
char cacrtfile[1024], cakeyfile[1024]; /* CA cert files */ |
|
|
|
snprintf(cacrtfile, sizeof(cacrtfile), "/etc/letsencrypt/live/%s/fullchain.pem", tls_common_name); |
|
snprintf(cakeyfile, sizeof(cakeyfile), "/etc/letsencrypt/live/%s/privkey.pem", tls_common_name); |
|
|
|
if ((access(cacrtfile, R_OK) || access(cakeyfile, R_OK)) && (hostptr = strchr(tls_common_name, '.')) != NULL) |
|
{ |
|
/* |
|
* Try just domain name... |
|
*/ |
|
|
|
hostptr ++; |
|
if (strchr(hostptr, '.')) |
|
{ |
|
snprintf(cacrtfile, sizeof(cacrtfile), "/etc/letsencrypt/live/%s/fullchain.pem", hostptr); |
|
snprintf(cakeyfile, sizeof(cakeyfile), "/etc/letsencrypt/live/%s/privkey.pem", hostptr); |
|
} |
|
} |
|
|
|
if (!access(cacrtfile, R_OK) && !access(cakeyfile, R_OK)) |
|
{ |
|
/* |
|
* Use the CA certs... |
|
*/ |
|
|
|
strlcpy(crtfile, cacrtfile, sizeof(crtfile)); |
|
strlcpy(keyfile, cakeyfile, sizeof(keyfile)); |
|
} |
|
} |
|
|
|
have_creds = !access(crtfile, R_OK) && !access(keyfile, R_OK); |
|
} |
|
|
|
if (!have_creds && tls_auto_create && (hostname[0] || tls_common_name)) |
|
{ |
|
DEBUG_printf(("4_httpTLSStart: Auto-create credentials for \"%s\".", hostname[0] ? hostname : tls_common_name)); |
|
|
|
if (!cupsMakeServerCredentials(tls_keypath, hostname[0] ? hostname : tls_common_name, 0, NULL, time(NULL) + 365 * 86400)) |
|
{ |
|
DEBUG_puts("4_httpTLSStart: cupsMakeServerCredentials failed."); |
|
http->error = errno = EINVAL; |
|
http->status = HTTP_STATUS_ERROR; |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("Unable to create server credentials."), 1); |
|
|
|
return (-1); |
|
} |
|
} |
|
|
|
DEBUG_printf(("4_httpTLSStart: Using certificate \"%s\" and private key \"%s\".", crtfile, keyfile)); |
|
|
|
if (!status) |
|
status = gnutls_certificate_set_x509_key_file(*credentials, crtfile, keyfile, GNUTLS_X509_FMT_PEM); |
|
} |
|
|
|
if (!status) |
|
status = gnutls_credentials_set(http->tls, GNUTLS_CRD_CERTIFICATE, *credentials); |
|
|
|
if (status) |
|
{ |
|
http->error = EIO; |
|
http->status = HTTP_STATUS_ERROR; |
|
|
|
DEBUG_printf(("4_httpTLSStart: Unable to complete client/server setup: %s", gnutls_strerror(status))); |
|
_cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); |
|
|
|
gnutls_deinit(http->tls); |
|
gnutls_certificate_free_credentials(*credentials); |
|
free(credentials); |
|
http->tls = NULL; |
|
|
|
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) |
|
{ |
|
DEBUG_printf(("5_httpStartTLS: gnutls_handshake returned %d (%s)", |
|
status, gnutls_strerror(status))); |
|
|
|
if (gnutls_error_is_fatal(status)) |
|
{ |
|
http->error = EIO; |
|
http->status = HTTP_STATUS_ERROR; |
|
|
|
_cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, gnutls_strerror(status), 0); |
|
|
|
gnutls_deinit(http->tls); |
|
gnutls_certificate_free_credentials(*credentials); |
|
free(credentials); |
|
http->tls = NULL; |
|
|
|
return (-1); |
|
} |
|
} |
|
|
|
http->tls_credentials = credentials; |
|
|
|
return (0); |
|
} |
|
|
|
|
|
/* |
|
* '_httpTLSStop()' - Shut down SSL/TLS on a connection. |
|
*/ |
|
|
|
void |
|
_httpTLSStop(http_t *http) /* I - Connection to server */ |
|
{ |
|
int error; /* Error code */ |
|
|
|
|
|
error = gnutls_bye(http->tls, http->mode == _HTTP_MODE_CLIENT ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR); |
|
if (error != GNUTLS_E_SUCCESS) |
|
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, gnutls_strerror(errno), 0); |
|
|
|
gnutls_deinit(http->tls); |
|
http->tls = NULL; |
|
|
|
if (http->tls_credentials) |
|
{ |
|
gnutls_certificate_free_credentials(*(http->tls_credentials)); |
|
free(http->tls_credentials); |
|
http->tls_credentials = NULL; |
|
} |
|
} |
|
|
|
|
|
/* |
|
* '_httpTLSWrite()' - Write to a SSL/TLS connection. |
|
*/ |
|
|
|
int /* O - Bytes written */ |
|
_httpTLSWrite(http_t *http, /* I - Connection to server */ |
|
const char *buf, /* I - Buffer holding data */ |
|
int len) /* I - Length of buffer */ |
|
{ |
|
ssize_t result; /* Return value */ |
|
|
|
|
|
DEBUG_printf(("2http_write_ssl(http=%p, buf=%p, len=%d)", http, buf, len)); |
|
|
|
result = gnutls_record_send(http->tls, buf, (size_t)len); |
|
|
|
if (result < 0 && !errno) |
|
{ |
|
/* |
|
* Convert GNU TLS error to errno value... |
|
*/ |
|
|
|
switch (result) |
|
{ |
|
case GNUTLS_E_INTERRUPTED : |
|
errno = EINTR; |
|
break; |
|
|
|
case GNUTLS_E_AGAIN : |
|
errno = EAGAIN; |
|
break; |
|
|
|
default : |
|
errno = EPIPE; |
|
break; |
|
} |
|
|
|
result = -1; |
|
} |
|
|
|
DEBUG_printf(("3http_write_ssl: Returning %d.", (int)result)); |
|
|
|
return ((int)result); |
|
}
|
|
|