1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
24 * Source file for all NSS-specific code for the TLS/SSL layer. No code
25 * but vtls.c should ever call or use these functions.
28 #include "curl_setup.h"
34 #include "formdata.h" /* for the boundary function */
35 #include "url.h" /* for the ssl config check function */
42 #define _MPRINTF_REPLACE /* use the internal *printf() functions */
43 #include <curl/mprintf.h>
63 #define NSSVERNUM ((NSS_VMAJOR<<16)|(NSS_VMINOR<<8)|NSS_VPATCH)
65 #if NSSVERNUM >= 0x030f00 /* 3.15.0 */
69 #include "curl_memory.h"
74 /* The last #include file should be: */
77 #define SSL_DIR "/etc/pki/nssdb"
79 /* enough to fit the string "PEM Token #[0|1]" */
82 PRFileDesc *PR_ImportTCPSocket(PRInt32 osfd);
84 PRLock * nss_initlock = NULL;
85 PRLock * nss_crllock = NULL;
86 struct curl_llist *nss_crl_list = NULL;
87 NSSInitContext * nss_context = NULL;
89 volatile int initialized = 0;
96 #define PK11_SETATTRS(_attr, _idx, _type, _val, _len) do { \
97 CK_ATTRIBUTE *ptr = (_attr) + ((_idx)++); \
98 ptr->type = (_type); \
99 ptr->pValue = (_val); \
100 ptr->ulValueLen = (_len); \
103 #define CERT_NewTempCertificate __CERT_NewTempCertificate
105 #define NUM_OF_CIPHERS sizeof(cipherlist)/sizeof(cipherlist[0])
106 static const cipher_s cipherlist[] = {
107 /* SSL2 cipher suites */
108 {"rc4", SSL_EN_RC4_128_WITH_MD5},
109 {"rc4-md5", SSL_EN_RC4_128_WITH_MD5},
110 {"rc4export", SSL_EN_RC4_128_EXPORT40_WITH_MD5},
111 {"rc2", SSL_EN_RC2_128_CBC_WITH_MD5},
112 {"rc2export", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5},
113 {"des", SSL_EN_DES_64_CBC_WITH_MD5},
114 {"desede3", SSL_EN_DES_192_EDE3_CBC_WITH_MD5},
115 /* SSL3/TLS cipher suites */
116 {"rsa_rc4_128_md5", SSL_RSA_WITH_RC4_128_MD5},
117 {"rsa_rc4_128_sha", SSL_RSA_WITH_RC4_128_SHA},
118 {"rsa_3des_sha", SSL_RSA_WITH_3DES_EDE_CBC_SHA},
119 {"rsa_des_sha", SSL_RSA_WITH_DES_CBC_SHA},
120 {"rsa_rc4_40_md5", SSL_RSA_EXPORT_WITH_RC4_40_MD5},
121 {"rsa_rc2_40_md5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5},
122 {"rsa_null_md5", SSL_RSA_WITH_NULL_MD5},
123 {"rsa_null_sha", SSL_RSA_WITH_NULL_SHA},
124 {"fips_3des_sha", SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA},
125 {"fips_des_sha", SSL_RSA_FIPS_WITH_DES_CBC_SHA},
126 {"fortezza", SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA},
127 {"fortezza_rc4_128_sha", SSL_FORTEZZA_DMS_WITH_RC4_128_SHA},
128 {"fortezza_null", SSL_FORTEZZA_DMS_WITH_NULL_SHA},
129 /* TLS 1.0: Exportable 56-bit Cipher Suites. */
130 {"rsa_des_56_sha", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA},
131 {"rsa_rc4_56_sha", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA},
133 {"dhe_dss_aes_128_cbc_sha", TLS_DHE_DSS_WITH_AES_128_CBC_SHA},
134 {"dhe_dss_aes_256_cbc_sha", TLS_DHE_DSS_WITH_AES_256_CBC_SHA},
135 {"dhe_rsa_aes_128_cbc_sha", TLS_DHE_RSA_WITH_AES_128_CBC_SHA},
136 {"dhe_rsa_aes_256_cbc_sha", TLS_DHE_RSA_WITH_AES_256_CBC_SHA},
137 {"rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA},
138 {"rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA},
140 {"ecdh_ecdsa_null_sha", TLS_ECDH_ECDSA_WITH_NULL_SHA},
141 {"ecdh_ecdsa_rc4_128_sha", TLS_ECDH_ECDSA_WITH_RC4_128_SHA},
142 {"ecdh_ecdsa_3des_sha", TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA},
143 {"ecdh_ecdsa_aes_128_sha", TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA},
144 {"ecdh_ecdsa_aes_256_sha", TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA},
145 {"ecdhe_ecdsa_null_sha", TLS_ECDHE_ECDSA_WITH_NULL_SHA},
146 {"ecdhe_ecdsa_rc4_128_sha", TLS_ECDHE_ECDSA_WITH_RC4_128_SHA},
147 {"ecdhe_ecdsa_3des_sha", TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA},
148 {"ecdhe_ecdsa_aes_128_sha", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA},
149 {"ecdhe_ecdsa_aes_256_sha", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA},
150 {"ecdh_rsa_null_sha", TLS_ECDH_RSA_WITH_NULL_SHA},
151 {"ecdh_rsa_128_sha", TLS_ECDH_RSA_WITH_RC4_128_SHA},
152 {"ecdh_rsa_3des_sha", TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA},
153 {"ecdh_rsa_aes_128_sha", TLS_ECDH_RSA_WITH_AES_128_CBC_SHA},
154 {"ecdh_rsa_aes_256_sha", TLS_ECDH_RSA_WITH_AES_256_CBC_SHA},
155 {"echde_rsa_null", TLS_ECDHE_RSA_WITH_NULL_SHA},
156 {"ecdhe_rsa_rc4_128_sha", TLS_ECDHE_RSA_WITH_RC4_128_SHA},
157 {"ecdhe_rsa_3des_sha", TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA},
158 {"ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
159 {"ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA},
160 {"ecdh_anon_null_sha", TLS_ECDH_anon_WITH_NULL_SHA},
161 {"ecdh_anon_rc4_128sha", TLS_ECDH_anon_WITH_RC4_128_SHA},
162 {"ecdh_anon_3des_sha", TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA},
163 {"ecdh_anon_aes_128_sha", TLS_ECDH_anon_WITH_AES_128_CBC_SHA},
164 {"ecdh_anon_aes_256_sha", TLS_ECDH_anon_WITH_AES_256_CBC_SHA},
165 #ifdef TLS_RSA_WITH_NULL_SHA256
166 /* new HMAC-SHA256 cipher suites specified in RFC */
167 {"rsa_null_sha_256", TLS_RSA_WITH_NULL_SHA256},
168 {"rsa_aes_128_cbc_sha_256", TLS_RSA_WITH_AES_128_CBC_SHA256},
169 {"rsa_aes_256_cbc_sha_256", TLS_RSA_WITH_AES_256_CBC_SHA256},
170 {"dhe_rsa_aes_128_cbc_sha_256", TLS_DHE_RSA_WITH_AES_128_CBC_SHA256},
171 {"dhe_rsa_aes_256_cbc_sha_256", TLS_DHE_RSA_WITH_AES_256_CBC_SHA256},
172 {"ecdhe_ecdsa_aes_128_cbc_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256},
173 {"ecdhe_rsa_aes_128_cbc_sha_256", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256},
175 #ifdef TLS_RSA_WITH_AES_128_GCM_SHA256
176 /* AES GCM cipher suites in RFC 5288 and RFC 5289 */
177 {"rsa_aes_128_gcm_sha_256", TLS_RSA_WITH_AES_128_GCM_SHA256},
178 {"dhe_rsa_aes_128_gcm_sha_256", TLS_DHE_RSA_WITH_AES_128_GCM_SHA256},
179 {"dhe_dss_aes_128_gcm_sha_256", TLS_DHE_DSS_WITH_AES_128_GCM_SHA256},
180 {"ecdhe_ecdsa_aes_128_gcm_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
181 {"ecdh_ecdsa_aes_128_gcm_sha_256", TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256},
182 {"ecdhe_rsa_aes_128_gcm_sha_256", TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
183 {"ecdh_rsa_aes_128_gcm_sha_256", TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256},
187 static const char* pem_library = "libnsspem.so";
188 SECMODModule* mod = NULL;
190 /* NSPR I/O layer we use to detect blocking direction during SSL handshake */
191 static PRDescIdentity nspr_io_identity = PR_INVALID_IO_LAYER;
192 static PRIOMethods nspr_io_methods;
194 static const char* nss_error_to_name(PRErrorCode code)
196 const char *name = PR_ErrorToName(code);
200 return "unknown error";
203 static void nss_print_error_message(struct SessionHandle *data, PRUint32 err)
205 failf(data, "%s", PR_ErrorToString(err, PR_LANGUAGE_I_DEFAULT));
208 static SECStatus set_ciphers(struct SessionHandle *data, PRFileDesc * model,
212 PRBool cipher_state[NUM_OF_CIPHERS];
216 /* First disable all ciphers. This uses a different max value in case
217 * NSS adds more ciphers later we don't want them available by
220 for(i=0; i<SSL_NumImplementedCiphers; i++) {
221 SSL_CipherPrefSet(model, SSL_ImplementedCiphers[i], PR_FALSE);
224 /* Set every entry in our list to false */
225 for(i=0; i<NUM_OF_CIPHERS; i++) {
226 cipher_state[i] = PR_FALSE;
229 cipher = cipher_list;
231 while(cipher_list && (cipher_list[0])) {
232 while((*cipher) && (ISSPACE(*cipher)))
235 if((cipher_list = strchr(cipher, ','))) {
236 *cipher_list++ = '\0';
241 for(i=0; i<NUM_OF_CIPHERS; i++) {
242 if(Curl_raw_equal(cipher, cipherlist[i].name)) {
243 cipher_state[i] = PR_TRUE;
249 if(found == PR_FALSE) {
250 failf(data, "Unknown cipher in list: %s", cipher);
255 cipher = cipher_list;
259 /* Finally actually enable the selected ciphers */
260 for(i=0; i<NUM_OF_CIPHERS; i++) {
264 if(SSL_CipherPrefSet(model, cipherlist[i].num, PR_TRUE) != SECSuccess) {
265 failf(data, "cipher-suite not supported by NSS: %s", cipherlist[i].name);
274 * Get the number of ciphers that are enabled. We use this to determine
275 * if we need to call NSS_SetDomesticPolicy() to enable the default ciphers.
277 static int num_enabled_ciphers(void)
283 for(i=0; i<NUM_OF_CIPHERS; i++) {
284 SSL_CipherPolicyGet(cipherlist[i].num, &policy);
292 * Determine whether the nickname passed in is a filename that needs to
293 * be loaded as a PEM or a regular NSS nickname.
295 * returns 1 for a file
296 * returns 0 for not a file (NSS nickname)
298 static int is_file(const char *filename)
305 if(stat(filename, &st) == 0)
306 if(S_ISREG(st.st_mode))
312 /* Check if the given string is filename or nickname of a certificate. If the
313 * given string is recognized as filename, return NULL. If the given string is
314 * recognized as nickname, return a duplicated string. The returned string
315 * should be later deallocated using free(). If the OOM failure occurs, we
318 static char* dup_nickname(struct SessionHandle *data, enum dupstring cert_kind)
320 const char *str = data->set.str[cert_kind];
324 /* no such file exists, use the string as nickname */
327 /* search the last slash; we require at least one slash in a file name */
328 n = strrchr(str, '/');
330 infof(data, "warning: certificate file name \"%s\" handled as nickname; "
331 "please use \"./%s\" to force file name\n", str, str);
335 /* we'll use the PEM reader to read the certificate from file */
339 /* Call PK11_CreateGenericObject() with the given obj_class and filename. If
340 * the call succeeds, append the object handle to the list of objects so that
341 * the object can be destroyed in Curl_nss_close(). */
342 static CURLcode nss_create_object(struct ssl_connect_data *ssl,
343 CK_OBJECT_CLASS obj_class,
344 const char *filename, bool cacert)
347 PK11GenericObject *obj;
348 CK_BBOOL cktrue = CK_TRUE;
349 CK_BBOOL ckfalse = CK_FALSE;
350 CK_ATTRIBUTE attrs[/* max count of attributes */ 4];
352 CURLcode result = (cacert)
353 ? CURLE_SSL_CACERT_BADFILE
354 : CURLE_SSL_CERTPROBLEM;
356 const int slot_id = (cacert) ? 0 : 1;
357 char *slot_name = aprintf("PEM Token #%d", slot_id);
359 return CURLE_OUT_OF_MEMORY;
361 slot = PK11_FindSlotByName(slot_name);
366 PK11_SETATTRS(attrs, attr_cnt, CKA_CLASS, &obj_class, sizeof(obj_class));
367 PK11_SETATTRS(attrs, attr_cnt, CKA_TOKEN, &cktrue, sizeof(CK_BBOOL));
368 PK11_SETATTRS(attrs, attr_cnt, CKA_LABEL, (unsigned char *)filename,
369 strlen(filename) + 1);
371 if(CKO_CERTIFICATE == obj_class) {
372 CK_BBOOL *pval = (cacert) ? (&cktrue) : (&ckfalse);
373 PK11_SETATTRS(attrs, attr_cnt, CKA_TRUST, pval, sizeof(*pval));
376 obj = PK11_CreateGenericObject(slot, attrs, attr_cnt, PR_FALSE);
381 if(!Curl_llist_insert_next(ssl->obj_list, ssl->obj_list->tail, obj)) {
382 PK11_DestroyGenericObject(obj);
383 return CURLE_OUT_OF_MEMORY;
386 if(!cacert && CKO_CERTIFICATE == obj_class)
387 /* store reference to a client certificate */
388 ssl->obj_clicert = obj;
393 /* Destroy the NSS object whose handle is given by ptr. This function is
394 * a callback of Curl_llist_alloc() used by Curl_llist_destroy() to destroy
395 * NSS objects in Curl_nss_close() */
396 static void nss_destroy_object(void *user, void *ptr)
398 PK11GenericObject *obj = (PK11GenericObject *)ptr;
400 PK11_DestroyGenericObject(obj);
403 /* same as nss_destroy_object() but for CRL items */
404 static void nss_destroy_crl_item(void *user, void *ptr)
406 SECItem *crl_der = (SECItem *)ptr;
408 SECITEM_FreeItem(crl_der, PR_TRUE);
411 static CURLcode nss_load_cert(struct ssl_connect_data *ssl,
412 const char *filename, PRBool cacert)
414 CURLcode result = (cacert)
415 ? CURLE_SSL_CACERT_BADFILE
416 : CURLE_SSL_CERTPROBLEM;
418 /* libnsspem.so leaks memory if the requested file does not exist. For more
419 * details, go to <https://bugzilla.redhat.com/734760>. */
420 if(is_file(filename))
421 result = nss_create_object(ssl, CKO_CERTIFICATE, filename, cacert);
423 if(!result && !cacert) {
424 /* we have successfully loaded a client certificate */
425 CERTCertificate *cert;
426 char *nickname = NULL;
427 char *n = strrchr(filename, '/');
431 /* The following undocumented magic helps to avoid a SIGSEGV on call
432 * of PK11_ReadRawAttribute() from SelectClientCert() when using an
433 * immature version of libnsspem.so. For more details, go to
434 * <https://bugzilla.redhat.com/733685>. */
435 nickname = aprintf("PEM Token #1:%s", n);
437 cert = PK11_FindCertFromNickname(nickname, NULL);
439 CERT_DestroyCertificate(cert);
448 /* add given CRL to cache if it is not already there */
449 static CURLcode nss_cache_crl(SECItem *crl_der)
451 CERTCertDBHandle *db = CERT_GetDefaultCertDB();
452 CERTSignedCrl *crl = SEC_FindCrlByDERCert(db, crl_der, 0);
454 /* CRL already cached */
456 SECITEM_FreeItem(crl_der, PR_TRUE);
460 /* acquire lock before call of CERT_CacheCRL() and accessing nss_crl_list */
461 PR_Lock(nss_crllock);
463 /* store the CRL item so that we can free it in Curl_nss_cleanup() */
464 if(!Curl_llist_insert_next(nss_crl_list, nss_crl_list->tail, crl_der)) {
465 SECITEM_FreeItem(crl_der, PR_TRUE);
466 PR_Unlock(nss_crllock);
467 return CURLE_OUT_OF_MEMORY;
470 if(SECSuccess != CERT_CacheCRL(db, crl_der)) {
471 /* unable to cache CRL */
472 PR_Unlock(nss_crllock);
473 return CURLE_SSL_CRL_BADFILE;
476 /* we need to clear session cache, so that the CRL could take effect */
477 SSL_ClearSessionCache();
478 PR_Unlock(nss_crllock);
482 static CURLcode nss_load_crl(const char* crlfilename)
486 SECItem filedata = { 0, NULL, 0 };
487 SECItem *crl_der = NULL;
490 infile = PR_Open(crlfilename, PR_RDONLY, 0);
492 return CURLE_SSL_CRL_BADFILE;
494 if(PR_SUCCESS != PR_GetOpenFileInfo(infile, &info))
497 if(!SECITEM_AllocItem(NULL, &filedata, info.size + /* zero ended */ 1))
500 if(info.size != PR_Read(infile, filedata.data, info.size))
503 crl_der = SECITEM_AllocItem(NULL, NULL, 0U);
507 /* place a trailing zero right after the visible data */
508 body = (char*)filedata.data;
509 body[--filedata.len] = '\0';
511 body = strstr(body, "-----BEGIN");
515 char *begin = PORT_Strchr(body, '\n');
517 begin = PORT_Strchr(body, '\r');
521 trailer = strstr(++begin, "-----END");
525 /* retrieve DER from ASCII */
527 if(ATOB_ConvertAsciiToItem(crl_der, begin))
530 SECITEM_FreeItem(&filedata, PR_FALSE);
537 return nss_cache_crl(crl_der);
541 SECITEM_FreeItem(crl_der, PR_TRUE);
542 SECITEM_FreeItem(&filedata, PR_FALSE);
543 return CURLE_SSL_CRL_BADFILE;
546 static CURLcode nss_load_key(struct connectdata *conn, int sockindex,
552 struct ssl_connect_data *ssl = conn->ssl;
554 (void)sockindex; /* unused */
556 result = nss_create_object(ssl, CKO_PRIVATE_KEY, key_file, FALSE);
558 PR_SetError(SEC_ERROR_BAD_KEY, 0);
562 slot = PK11_FindSlotByName("PEM Token #1");
564 return CURLE_SSL_CERTPROBLEM;
566 /* This will force the token to be seen as re-inserted */
567 SECMOD_WaitForAnyTokenEvent(mod, 0, 0);
568 PK11_IsPresent(slot);
570 status = PK11_Authenticate(slot, PR_TRUE,
571 conn->data->set.str[STRING_KEY_PASSWD]);
574 return (SECSuccess == status) ? CURLE_OK : CURLE_SSL_CERTPROBLEM;
577 static int display_error(struct connectdata *conn, PRInt32 err,
578 const char *filename)
581 case SEC_ERROR_BAD_PASSWORD:
582 failf(conn->data, "Unable to load client key: Incorrect password");
584 case SEC_ERROR_UNKNOWN_CERT:
585 failf(conn->data, "Unable to load certificate %s", filename);
590 return 0; /* The caller will print a generic error */
593 static CURLcode cert_stuff(struct connectdata *conn, int sockindex,
594 char *cert_file, char *key_file)
596 struct SessionHandle *data = conn->data;
600 result = nss_load_cert(&conn->ssl[sockindex], cert_file, PR_FALSE);
602 const PRErrorCode err = PR_GetError();
603 if(!display_error(conn, err, cert_file)) {
604 const char *err_name = nss_error_to_name(err);
605 failf(data, "unable to load client cert: %d (%s)", err, err_name);
612 if(key_file || (is_file(cert_file))) {
614 result = nss_load_key(conn, sockindex, key_file);
616 /* In case the cert file also has the key */
617 result = nss_load_key(conn, sockindex, cert_file);
619 const PRErrorCode err = PR_GetError();
620 if(!display_error(conn, err, key_file)) {
621 const char *err_name = nss_error_to_name(err);
622 failf(data, "unable to load client key: %d (%s)", err, err_name);
632 static char * nss_get_password(PK11SlotInfo * slot, PRBool retry, void *arg)
634 (void)slot; /* unused */
636 if(retry || NULL == arg)
639 return (char *)PORT_Strdup((char *)arg);
642 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
644 static SECStatus nss_auth_cert_hook(void *arg, PRFileDesc *fd, PRBool checksig,
647 struct connectdata *conn = (struct connectdata *)arg;
649 #ifdef SSL_ENABLE_OCSP_STAPLING
650 if(conn->data->set.ssl.verifystatus) {
651 SECStatus cacheResult;
653 const SECItemArray *csa = SSL_PeerStapledOCSPResponses(fd);
655 failf(conn->data, "Invalid OCSP response");
660 failf(conn->data, "No OCSP response received");
664 cacheResult = CERT_CacheOCSPResponseFromSideChannel(
665 CERT_GetDefaultCertDB(), SSL_PeerCertificate(fd),
666 PR_Now(), &csa->items[0], arg
669 if(cacheResult != SECSuccess) {
670 failf(conn->data, "Invalid OCSP response");
676 if(!conn->data->set.ssl.verifypeer) {
677 infof(conn->data, "skipping SSL peer certificate verification\n");
681 return SSL_AuthCertificate(CERT_GetDefaultCertDB(), fd, checksig, isServer);
685 * Inform the application that the handshake is complete.
687 static void HandshakeCallback(PRFileDesc *sock, void *arg)
690 struct connectdata *conn = (struct connectdata*) arg;
691 unsigned int buflenmax = 50;
692 unsigned char buf[50];
694 SSLNextProtoState state;
696 struct ssl_connect_data *connssl = &conn->ssl[FIRSTSOCKET];
698 if(!conn->data->set.ssl_enable_npn && !conn->data->set.ssl_enable_alpn) {
702 if(SSL_GetNextProto(sock, &state, buf, &buflen, buflenmax) == SECSuccess) {
705 case SSL_NEXT_PROTO_NO_SUPPORT:
706 case SSL_NEXT_PROTO_NO_OVERLAP:
707 if(connssl->asked_for_h2)
708 infof(conn->data, "TLS, neither ALPN nor NPN succeeded\n");
710 #ifdef SSL_ENABLE_ALPN
711 case SSL_NEXT_PROTO_SELECTED:
712 infof(conn->data, "ALPN, server accepted to use %.*s\n", buflen, buf);
715 case SSL_NEXT_PROTO_NEGOTIATED:
716 infof(conn->data, "NPN, server accepted to use %.*s\n", buflen, buf);
720 if(buflen == NGHTTP2_PROTO_VERSION_ID_LEN &&
721 memcmp(NGHTTP2_PROTO_VERSION_ID, buf, NGHTTP2_PROTO_VERSION_ID_LEN)
723 conn->negnpn = NPN_HTTP2;
725 else if(buflen == ALPN_HTTP_1_1_LENGTH && memcmp(ALPN_HTTP_1_1, buf,
726 ALPN_HTTP_1_1_LENGTH)) {
727 conn->negnpn = NPN_HTTP1_1;
736 static void display_cert_info(struct SessionHandle *data,
737 CERTCertificate *cert)
739 char *subject, *issuer, *common_name;
740 PRExplodedTime printableTime;
741 char timeString[256];
742 PRTime notBefore, notAfter;
744 subject = CERT_NameToAscii(&cert->subject);
745 issuer = CERT_NameToAscii(&cert->issuer);
746 common_name = CERT_GetCommonName(&cert->subject);
747 infof(data, "\tsubject: %s\n", subject);
749 CERT_GetCertTimes(cert, ¬Before, ¬After);
750 PR_ExplodeTime(notBefore, PR_GMTParameters, &printableTime);
751 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
752 infof(data, "\tstart date: %s\n", timeString);
753 PR_ExplodeTime(notAfter, PR_GMTParameters, &printableTime);
754 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
755 infof(data, "\texpire date: %s\n", timeString);
756 infof(data, "\tcommon name: %s\n", common_name);
757 infof(data, "\tissuer: %s\n", issuer);
761 PR_Free(common_name);
764 static CURLcode display_conn_info(struct connectdata *conn, PRFileDesc *sock)
766 CURLcode result = CURLE_OK;
767 SSLChannelInfo channel;
768 SSLCipherSuiteInfo suite;
769 CERTCertificate *cert;
770 CERTCertificate *cert2;
771 CERTCertificate *cert3;
775 if(SSL_GetChannelInfo(sock, &channel, sizeof channel) ==
776 SECSuccess && channel.length == sizeof channel &&
777 channel.cipherSuite) {
778 if(SSL_GetCipherSuiteInfo(channel.cipherSuite,
779 &suite, sizeof suite) == SECSuccess) {
780 infof(conn->data, "SSL connection using %s\n", suite.cipherSuiteName);
784 cert = SSL_PeerCertificate(sock);
786 infof(conn->data, "Server certificate:\n");
788 if(!conn->data->set.ssl.certinfo) {
789 display_cert_info(conn->data, cert);
790 CERT_DestroyCertificate(cert);
793 /* Count certificates in chain. */
797 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
801 CERT_DestroyCertificate(cert2);
804 cert3 = CERT_FindCertIssuer(cert2, now, certUsageSSLCA);
805 CERT_DestroyCertificate(cert2);
810 result = Curl_ssl_init_certinfo(conn->data, i);
812 for(i = 0; cert; cert = cert2) {
813 result = Curl_extract_certinfo(conn, i++, (char *)cert->derCert.data,
814 (char *)cert->derCert.data +
820 CERT_DestroyCertificate(cert);
824 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
825 CERT_DestroyCertificate(cert);
834 static SECStatus BadCertHandler(void *arg, PRFileDesc *sock)
836 struct connectdata *conn = (struct connectdata *)arg;
837 struct SessionHandle *data = conn->data;
838 PRErrorCode err = PR_GetError();
839 CERTCertificate *cert;
841 /* remember the cert verification result */
842 data->set.ssl.certverifyresult = err;
844 if(err == SSL_ERROR_BAD_CERT_DOMAIN && !data->set.ssl.verifyhost)
845 /* we are asked not to verify the host name */
848 /* print only info about the cert, the error is printed off the callback */
849 cert = SSL_PeerCertificate(sock);
851 infof(data, "Server certificate:\n");
852 display_cert_info(data, cert);
853 CERT_DestroyCertificate(cert);
861 * Check that the Peer certificate's issuer certificate matches the one found
862 * by issuer_nickname. This is not exactly the way OpenSSL and GNU TLS do the
863 * issuer check, so we provide comments that mimic the OpenSSL
864 * X509_check_issued function (in x509v3/v3_purp.c)
866 static SECStatus check_issuer_cert(PRFileDesc *sock,
867 char *issuer_nickname)
869 CERTCertificate *cert,*cert_issuer,*issuer;
870 SECStatus res=SECSuccess;
871 void *proto_win = NULL;
874 PRArenaPool *tmpArena = NULL;
875 CERTAuthKeyID *authorityKeyID = NULL;
876 SECITEM *caname = NULL;
879 cert = SSL_PeerCertificate(sock);
880 cert_issuer = CERT_FindCertIssuer(cert,PR_Now(),certUsageObjectSigner);
882 proto_win = SSL_RevealPinArg(sock);
883 issuer = PK11_FindCertFromNickname(issuer_nickname, proto_win);
885 if((!cert_issuer) || (!issuer))
887 else if(SECITEM_CompareItem(&cert_issuer->derCert,
888 &issuer->derCert)!=SECEqual)
891 CERT_DestroyCertificate(cert);
892 CERT_DestroyCertificate(issuer);
893 CERT_DestroyCertificate(cert_issuer);
899 * Callback to pick the SSL client certificate.
901 static SECStatus SelectClientCert(void *arg, PRFileDesc *sock,
902 struct CERTDistNamesStr *caNames,
903 struct CERTCertificateStr **pRetCert,
904 struct SECKEYPrivateKeyStr **pRetKey)
906 struct ssl_connect_data *connssl = (struct ssl_connect_data *)arg;
907 struct SessionHandle *data = connssl->data;
908 const char *nickname = connssl->client_nickname;
910 if(connssl->obj_clicert) {
911 /* use the cert/key provided by PEM reader */
912 static const char pem_slotname[] = "PEM Token #1";
913 SECItem cert_der = { 0, NULL, 0 };
914 void *proto_win = SSL_RevealPinArg(sock);
915 struct CERTCertificateStr *cert;
916 struct SECKEYPrivateKeyStr *key;
918 PK11SlotInfo *slot = PK11_FindSlotByName(pem_slotname);
920 failf(data, "NSS: PK11 slot not found: %s", pem_slotname);
924 if(PK11_ReadRawAttribute(PK11_TypeGeneric, connssl->obj_clicert, CKA_VALUE,
925 &cert_der) != SECSuccess) {
926 failf(data, "NSS: CKA_VALUE not found in PK11 generic object");
931 cert = PK11_FindCertFromDERCertItem(slot, &cert_der, proto_win);
932 SECITEM_FreeItem(&cert_der, PR_FALSE);
934 failf(data, "NSS: client certificate from file not found");
939 key = PK11_FindPrivateKeyFromCert(slot, cert, NULL);
942 failf(data, "NSS: private key from file not found");
943 CERT_DestroyCertificate(cert);
947 infof(data, "NSS: client certificate from file\n");
948 display_cert_info(data, cert);
955 /* use the default NSS hook */
956 if(SECSuccess != NSS_GetClientAuthData((void *)nickname, sock, caNames,
958 || NULL == *pRetCert) {
961 failf(data, "NSS: client certificate not found (nickname not "
964 failf(data, "NSS: client certificate not found: %s", nickname);
969 /* get certificate nickname if any */
970 nickname = (*pRetCert)->nickname;
972 nickname = "[unknown]";
974 if(NULL == *pRetKey) {
975 failf(data, "NSS: private key not found for certificate: %s", nickname);
979 infof(data, "NSS: using client certificate: %s\n", nickname);
980 display_cert_info(data, *pRetCert);
984 /* update blocking direction in case of PR_WOULD_BLOCK_ERROR */
985 static void nss_update_connecting_state(ssl_connect_state state, void *secret)
987 struct ssl_connect_data *connssl = (struct ssl_connect_data *)secret;
988 if(PR_GetError() != PR_WOULD_BLOCK_ERROR)
989 /* an unrelated error is passing by */
992 switch(connssl->connecting_state) {
994 case ssl_connect_2_reading:
995 case ssl_connect_2_writing:
998 /* we are not called from an SSL handshake */
1002 /* update the state accordingly */
1003 connssl->connecting_state = state;
1006 /* recv() wrapper we use to detect blocking direction during SSL handshake */
1007 static PRInt32 nspr_io_recv(PRFileDesc *fd, void *buf, PRInt32 amount,
1008 PRIntn flags, PRIntervalTime timeout)
1010 const PRRecvFN recv_fn = fd->lower->methods->recv;
1011 const PRInt32 rv = recv_fn(fd->lower, buf, amount, flags, timeout);
1013 /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */
1014 nss_update_connecting_state(ssl_connect_2_reading, fd->secret);
1018 /* send() wrapper we use to detect blocking direction during SSL handshake */
1019 static PRInt32 nspr_io_send(PRFileDesc *fd, const void *buf, PRInt32 amount,
1020 PRIntn flags, PRIntervalTime timeout)
1022 const PRSendFN send_fn = fd->lower->methods->send;
1023 const PRInt32 rv = send_fn(fd->lower, buf, amount, flags, timeout);
1025 /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */
1026 nss_update_connecting_state(ssl_connect_2_writing, fd->secret);
1030 /* close() wrapper to avoid assertion failure due to fd->secret != NULL */
1031 static PRStatus nspr_io_close(PRFileDesc *fd)
1033 const PRCloseFN close_fn = PR_GetDefaultIOMethods()->close;
1035 return close_fn(fd);
1038 static CURLcode nss_init_core(struct SessionHandle *data, const char *cert_dir)
1040 NSSInitParameters initparams;
1042 if(nss_context != NULL)
1045 memset((void *) &initparams, '\0', sizeof(initparams));
1046 initparams.length = sizeof(initparams);
1049 char *certpath = aprintf("sql:%s", cert_dir);
1051 return CURLE_OUT_OF_MEMORY;
1053 infof(data, "Initializing NSS with certpath: %s\n", certpath);
1054 nss_context = NSS_InitContext(certpath, "", "", "", &initparams,
1055 NSS_INIT_READONLY | NSS_INIT_PK11RELOAD);
1058 if(nss_context != NULL)
1061 infof(data, "Unable to initialize NSS database\n");
1064 infof(data, "Initializing NSS with certpath: none\n");
1065 nss_context = NSS_InitContext("", "", "", "", &initparams, NSS_INIT_READONLY
1066 | NSS_INIT_NOCERTDB | NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN
1067 | NSS_INIT_NOROOTINIT | NSS_INIT_OPTIMIZESPACE | NSS_INIT_PK11RELOAD);
1068 if(nss_context != NULL)
1071 infof(data, "Unable to initialize NSS\n");
1072 return CURLE_SSL_CACERT_BADFILE;
1075 static CURLcode nss_init(struct SessionHandle *data)
1084 /* list of all CRL items we need to destroy in Curl_nss_cleanup() */
1085 nss_crl_list = Curl_llist_alloc(nss_destroy_crl_item);
1087 return CURLE_OUT_OF_MEMORY;
1089 /* First we check if $SSL_DIR points to a valid dir */
1090 cert_dir = getenv("SSL_DIR");
1092 if((stat(cert_dir, &st) != 0) ||
1093 (!S_ISDIR(st.st_mode))) {
1098 /* Now we check if the default location is a valid dir */
1100 if((stat(SSL_DIR, &st) == 0) &&
1101 (S_ISDIR(st.st_mode))) {
1102 cert_dir = (char *)SSL_DIR;
1106 if(nspr_io_identity == PR_INVALID_IO_LAYER) {
1107 /* allocate an identity for our own NSPR I/O layer */
1108 nspr_io_identity = PR_GetUniqueIdentity("libcurl");
1109 if(nspr_io_identity == PR_INVALID_IO_LAYER)
1110 return CURLE_OUT_OF_MEMORY;
1112 /* the default methods just call down to the lower I/O layer */
1113 memcpy(&nspr_io_methods, PR_GetDefaultIOMethods(), sizeof nspr_io_methods);
1115 /* override certain methods in the table by our wrappers */
1116 nspr_io_methods.recv = nspr_io_recv;
1117 nspr_io_methods.send = nspr_io_send;
1118 nspr_io_methods.close = nspr_io_close;
1121 result = nss_init_core(data, cert_dir);
1125 if(num_enabled_ciphers() == 0)
1126 NSS_SetDomesticPolicy();
1136 * @retval 0 error initializing SSL
1137 * @retval 1 SSL initialized successfully
1139 int Curl_nss_init(void)
1141 /* curl_global_init() is not thread-safe so this test is ok */
1142 if(nss_initlock == NULL) {
1143 PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256);
1144 nss_initlock = PR_NewLock();
1145 nss_crllock = PR_NewLock();
1148 /* We will actually initialize NSS later */
1153 CURLcode Curl_nss_force_init(struct SessionHandle *data)
1157 failf(data, "unable to initialize NSS, curl_global_init() should have "
1158 "been called with CURL_GLOBAL_SSL or CURL_GLOBAL_ALL");
1159 return CURLE_FAILED_INIT;
1162 PR_Lock(nss_initlock);
1163 result = nss_init(data);
1164 PR_Unlock(nss_initlock);
1169 /* Global cleanup */
1170 void Curl_nss_cleanup(void)
1172 /* This function isn't required to be threadsafe and this is only done
1173 * as a safety feature.
1175 PR_Lock(nss_initlock);
1177 /* Free references to client certificates held in the SSL session cache.
1178 * Omitting this hampers destruction of the security module owning
1179 * the certificates. */
1180 SSL_ClearSessionCache();
1182 if(mod && SECSuccess == SECMOD_UnloadUserModule(mod)) {
1183 SECMOD_DestroyModule(mod);
1186 NSS_ShutdownContext(nss_context);
1190 /* destroy all CRL items */
1191 Curl_llist_destroy(nss_crl_list, NULL);
1192 nss_crl_list = NULL;
1194 PR_Unlock(nss_initlock);
1196 PR_DestroyLock(nss_initlock);
1197 PR_DestroyLock(nss_crllock);
1198 nss_initlock = NULL;
1204 * This function uses SSL_peek to determine connection status.
1207 * 1 means the connection is still in place
1208 * 0 means the connection has been closed
1209 * -1 means the connection status is unknown
1212 Curl_nss_check_cxn(struct connectdata *conn)
1218 PR_Recv(conn->ssl[FIRSTSOCKET].handle, (void *)&buf, 1, PR_MSG_PEEK,
1219 PR_SecondsToInterval(1));
1221 return 1; /* connection still in place */
1224 return 0; /* connection has been closed */
1226 return -1; /* connection status unknown */
1230 * This function is called when an SSL connection is closed.
1232 void Curl_nss_close(struct connectdata *conn, int sockindex)
1234 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1236 if(connssl->handle) {
1237 /* NSS closes the socket we previously handed to it, so we must mark it
1238 as closed to avoid double close */
1239 fake_sclose(conn->sock[sockindex]);
1240 conn->sock[sockindex] = CURL_SOCKET_BAD;
1242 if((connssl->client_nickname != NULL) || (connssl->obj_clicert != NULL))
1243 /* A server might require different authentication based on the
1244 * particular path being requested by the client. To support this
1245 * scenario, we must ensure that a connection will never reuse the
1246 * authentication data from a previous connection. */
1247 SSL_InvalidateSession(connssl->handle);
1249 if(connssl->client_nickname != NULL) {
1250 free(connssl->client_nickname);
1251 connssl->client_nickname = NULL;
1253 /* destroy all NSS objects in order to avoid failure of NSS shutdown */
1254 Curl_llist_destroy(connssl->obj_list, NULL);
1255 connssl->obj_list = NULL;
1256 connssl->obj_clicert = NULL;
1258 PR_Close(connssl->handle);
1259 connssl->handle = NULL;
1264 * This function is called when the 'data' struct is going away. Close
1265 * down everything and free all resources!
1267 void Curl_nss_close_all(struct SessionHandle *data)
1272 /* return true if NSS can provide error code (and possibly msg) for the
1274 static bool is_nss_error(CURLcode err)
1277 case CURLE_PEER_FAILED_VERIFICATION:
1278 case CURLE_SSL_CACERT:
1279 case CURLE_SSL_CERTPROBLEM:
1280 case CURLE_SSL_CONNECT_ERROR:
1281 case CURLE_SSL_ISSUER_ERROR:
1289 /* return true if the given error code is related to a client certificate */
1290 static bool is_cc_error(PRInt32 err)
1293 case SSL_ERROR_BAD_CERT_ALERT:
1294 case SSL_ERROR_EXPIRED_CERT_ALERT:
1295 case SSL_ERROR_REVOKED_CERT_ALERT:
1303 static Curl_recv nss_recv;
1304 static Curl_send nss_send;
1306 static CURLcode nss_load_ca_certificates(struct connectdata *conn,
1309 struct SessionHandle *data = conn->data;
1310 const char *cafile = data->set.ssl.CAfile;
1311 const char *capath = data->set.ssl.CApath;
1314 CURLcode result = nss_load_cert(&conn->ssl[sockindex], cafile, PR_TRUE);
1321 if(stat(capath, &st) == -1)
1322 return CURLE_SSL_CACERT_BADFILE;
1324 if(S_ISDIR(st.st_mode)) {
1326 PRDir *dir = PR_OpenDir(capath);
1328 return CURLE_SSL_CACERT_BADFILE;
1330 while((entry = PR_ReadDir(dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN))) {
1331 char *fullpath = aprintf("%s/%s", capath, entry->name);
1334 return CURLE_OUT_OF_MEMORY;
1337 if(CURLE_OK != nss_load_cert(&conn->ssl[sockindex], fullpath, PR_TRUE))
1338 /* This is purposefully tolerant of errors so non-PEM files can
1339 * be in the same directory */
1340 infof(data, "failed to load '%s' from CURLOPT_CAPATH\n", fullpath);
1348 infof(data, "warning: CURLOPT_CAPATH not a directory (%s)\n", capath);
1351 infof(data, " CAfile: %s\n CApath: %s\n",
1352 cafile ? cafile : "none",
1353 capath ? capath : "none");
1358 static CURLcode nss_init_sslver(SSLVersionRange *sslver,
1359 struct SessionHandle *data)
1361 switch(data->set.ssl.version) {
1363 case CURL_SSLVERSION_DEFAULT:
1364 case CURL_SSLVERSION_TLSv1:
1365 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1366 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1367 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1368 #elif defined SSL_LIBRARY_VERSION_TLS_1_1
1369 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1371 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1375 case CURL_SSLVERSION_SSLv2:
1376 sslver->min = SSL_LIBRARY_VERSION_2;
1377 sslver->max = SSL_LIBRARY_VERSION_2;
1380 case CURL_SSLVERSION_SSLv3:
1381 sslver->min = SSL_LIBRARY_VERSION_3_0;
1382 sslver->max = SSL_LIBRARY_VERSION_3_0;
1385 case CURL_SSLVERSION_TLSv1_0:
1386 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1387 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1390 case CURL_SSLVERSION_TLSv1_1:
1391 #ifdef SSL_LIBRARY_VERSION_TLS_1_1
1392 sslver->min = SSL_LIBRARY_VERSION_TLS_1_1;
1393 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1398 case CURL_SSLVERSION_TLSv1_2:
1399 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1400 sslver->min = SSL_LIBRARY_VERSION_TLS_1_2;
1401 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1407 failf(data, "TLS minor version cannot be set");
1408 return CURLE_SSL_CONNECT_ERROR;
1411 static CURLcode nss_fail_connect(struct ssl_connect_data *connssl,
1412 struct SessionHandle *data,
1415 PRErrorCode err = 0;
1417 if(is_nss_error(curlerr)) {
1418 /* read NSPR error code */
1419 err = PR_GetError();
1420 if(is_cc_error(err))
1421 curlerr = CURLE_SSL_CERTPROBLEM;
1423 /* print the error number and error string */
1424 infof(data, "NSS error %d (%s)\n", err, nss_error_to_name(err));
1426 /* print a human-readable message describing the error if available */
1427 nss_print_error_message(data, err);
1430 /* cleanup on connection failure */
1431 Curl_llist_destroy(connssl->obj_list, NULL);
1432 connssl->obj_list = NULL;
1437 /* Switch the SSL socket into non-blocking mode. */
1438 static CURLcode nss_set_nonblock(struct ssl_connect_data *connssl,
1439 struct SessionHandle *data)
1441 static PRSocketOptionData sock_opt;
1442 sock_opt.option = PR_SockOpt_Nonblocking;
1443 sock_opt.value.non_blocking = PR_TRUE;
1445 if(PR_SetSocketOption(connssl->handle, &sock_opt) != PR_SUCCESS)
1446 return nss_fail_connect(connssl, data, CURLE_SSL_CONNECT_ERROR);
1451 static CURLcode nss_setup_connect(struct connectdata *conn, int sockindex)
1453 PRFileDesc *model = NULL;
1454 PRFileDesc *nspr_io = NULL;
1455 PRFileDesc *nspr_io_stub = NULL;
1456 PRBool ssl_no_cache;
1457 PRBool ssl_cbc_random_iv;
1458 struct SessionHandle *data = conn->data;
1459 curl_socket_t sockfd = conn->sock[sockindex];
1460 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1463 SSLVersionRange sslver = {
1464 SSL_LIBRARY_VERSION_TLS_1_0, /* min */
1465 SSL_LIBRARY_VERSION_TLS_1_0 /* max */
1469 #if defined(SSL_ENABLE_NPN) || defined(SSL_ENABLE_ALPN)
1470 unsigned int alpn_protos_len = NGHTTP2_PROTO_VERSION_ID_LEN +
1471 ALPN_HTTP_1_1_LENGTH + 2;
1472 unsigned char alpn_protos[NGHTTP2_PROTO_VERSION_ID_LEN + ALPN_HTTP_1_1_LENGTH
1478 connssl->data = data;
1480 /* list of all NSS objects we need to destroy in Curl_nss_close() */
1481 connssl->obj_list = Curl_llist_alloc(nss_destroy_object);
1482 if(!connssl->obj_list)
1483 return CURLE_OUT_OF_MEMORY;
1485 /* FIXME. NSS doesn't support multiple databases open at the same time. */
1486 PR_Lock(nss_initlock);
1487 result = nss_init(conn->data);
1489 PR_Unlock(nss_initlock);
1493 result = CURLE_SSL_CONNECT_ERROR;
1496 char *configstring = aprintf("library=%s name=PEM", pem_library);
1498 PR_Unlock(nss_initlock);
1501 mod = SECMOD_LoadUserModule(configstring, NULL, PR_FALSE);
1504 if(!mod || !mod->loaded) {
1506 SECMOD_DestroyModule(mod);
1509 infof(data, "WARNING: failed to load NSS PEM library %s. Using "
1510 "OpenSSL PEM certificates will not work.\n", pem_library);
1514 PK11_SetPasswordFunc(nss_get_password);
1515 PR_Unlock(nss_initlock);
1517 model = PR_NewTCPSocket();
1520 model = SSL_ImportFD(NULL, model);
1522 if(SSL_OptionSet(model, SSL_SECURITY, PR_TRUE) != SECSuccess)
1524 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_SERVER, PR_FALSE) != SECSuccess)
1526 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE) != SECSuccess)
1529 /* do not use SSL cache if disabled or we are not going to verify peer */
1530 ssl_no_cache = (conn->ssl_config.sessionid && data->set.ssl.verifypeer) ?
1532 if(SSL_OptionSet(model, SSL_NO_CACHE, ssl_no_cache) != SECSuccess)
1535 /* enable/disable the requested SSL version(s) */
1536 if(nss_init_sslver(&sslver, data) != CURLE_OK)
1538 if(SSL_VersionRangeSet(model, &sslver) != SECSuccess)
1541 ssl_cbc_random_iv = !data->set.ssl_enable_beast;
1542 #ifdef SSL_CBC_RANDOM_IV
1543 /* unless the user explicitly asks to allow the protocol vulnerability, we
1544 use the work-around */
1545 if(SSL_OptionSet(model, SSL_CBC_RANDOM_IV, ssl_cbc_random_iv) != SECSuccess)
1546 infof(data, "warning: failed to set SSL_CBC_RANDOM_IV = %d\n",
1549 if(ssl_cbc_random_iv)
1550 infof(data, "warning: support for SSL_CBC_RANDOM_IV not compiled in\n");
1553 if(data->set.ssl.cipher_list) {
1554 if(set_ciphers(data, model, data->set.ssl.cipher_list) != SECSuccess) {
1555 result = CURLE_SSL_CIPHER;
1560 if(!data->set.ssl.verifypeer && data->set.ssl.verifyhost)
1561 infof(data, "warning: ignoring value of ssl.verifyhost\n");
1563 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
1565 if(SSL_AuthCertificateHook(model, nss_auth_cert_hook, conn) != SECSuccess)
1568 data->set.ssl.certverifyresult=0; /* not checked yet */
1569 if(SSL_BadCertHook(model, BadCertHandler, conn) != SECSuccess)
1572 if(SSL_HandshakeCallback(model, HandshakeCallback, conn) != SECSuccess)
1575 if(data->set.ssl.verifypeer) {
1576 const CURLcode rv = nss_load_ca_certificates(conn, sockindex);
1583 if(data->set.ssl.CRLfile) {
1584 const CURLcode rv = nss_load_crl(data->set.ssl.CRLfile);
1589 infof(data, " CRLfile: %s\n", data->set.ssl.CRLfile);
1592 if(data->set.str[STRING_CERT]) {
1593 char *nickname = dup_nickname(data, STRING_CERT);
1595 /* we are not going to use libnsspem.so to read the client cert */
1596 connssl->obj_clicert = NULL;
1599 CURLcode rv = cert_stuff(conn, sockindex, data->set.str[STRING_CERT],
1600 data->set.str[STRING_KEY]);
1602 /* failf() is already done in cert_stuff() */
1608 /* store the nickname for SelectClientCert() called during handshake */
1609 connssl->client_nickname = nickname;
1612 connssl->client_nickname = NULL;
1614 if(SSL_GetClientAuthDataHook(model, SelectClientCert,
1615 (void *)connssl) != SECSuccess) {
1616 result = CURLE_SSL_CERTPROBLEM;
1620 /* wrap OS file descriptor by NSPR's file descriptor abstraction */
1621 nspr_io = PR_ImportTCPSocket(sockfd);
1625 /* create our own NSPR I/O layer */
1626 nspr_io_stub = PR_CreateIOLayerStub(nspr_io_identity, &nspr_io_methods);
1632 /* make the per-connection data accessible from NSPR I/O callbacks */
1633 nspr_io_stub->secret = (void *)connssl;
1635 /* push our new layer to the NSPR I/O stack */
1636 if(PR_PushIOLayer(nspr_io, PR_TOP_IO_LAYER, nspr_io_stub) != PR_SUCCESS) {
1638 PR_Close(nspr_io_stub);
1642 /* import our model socket onto the current I/O stack */
1643 connssl->handle = SSL_ImportFD(model, nspr_io);
1644 if(!connssl->handle) {
1649 PR_Close(model); /* We don't need this any more */
1652 /* This is the password associated with the cert that we're using */
1653 if(data->set.str[STRING_KEY_PASSWD]) {
1654 SSL_SetPKCS11PinArg(connssl->handle, data->set.str[STRING_KEY_PASSWD]);
1657 #ifdef SSL_ENABLE_OCSP_STAPLING
1658 if(data->set.ssl.verifystatus) {
1659 if(SSL_OptionSet(connssl->handle, SSL_ENABLE_OCSP_STAPLING, PR_TRUE)
1666 if(data->set.httpversion == CURL_HTTP_VERSION_2_0) {
1667 #ifdef SSL_ENABLE_NPN
1668 if(data->set.ssl_enable_npn) {
1669 if(SSL_OptionSet(connssl->handle, SSL_ENABLE_NPN, PR_TRUE) != SECSuccess)
1674 #ifdef SSL_ENABLE_ALPN
1675 if(data->set.ssl_enable_alpn) {
1676 if(SSL_OptionSet(connssl->handle, SSL_ENABLE_ALPN, PR_TRUE)
1682 #if defined(SSL_ENABLE_NPN) || defined(SSL_ENABLE_ALPN)
1683 if(data->set.ssl_enable_npn || data->set.ssl_enable_alpn) {
1684 alpn_protos[cur] = NGHTTP2_PROTO_VERSION_ID_LEN;
1686 memcpy(&alpn_protos[cur], NGHTTP2_PROTO_VERSION_ID,
1687 NGHTTP2_PROTO_VERSION_ID_LEN);
1688 cur += NGHTTP2_PROTO_VERSION_ID_LEN;
1689 alpn_protos[cur] = ALPN_HTTP_1_1_LENGTH;
1691 memcpy(&alpn_protos[cur], ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH);
1693 if(SSL_SetNextProtoNego(connssl->handle, alpn_protos, alpn_protos_len)
1696 connssl->asked_for_h2 = TRUE;
1699 infof(data, "SSL, can't negotiate HTTP/2.0 with neither NPN nor ALPN\n");
1706 /* Force handshake on next I/O */
1707 SSL_ResetHandshake(connssl->handle, /* asServer */ PR_FALSE);
1709 SSL_SetURL(connssl->handle, conn->host.name);
1717 return nss_fail_connect(connssl, data, result);
1720 static CURLcode nss_do_connect(struct connectdata *conn, int sockindex)
1722 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1723 struct SessionHandle *data = conn->data;
1724 CURLcode result = CURLE_SSL_CONNECT_ERROR;
1727 /* check timeout situation */
1728 const long time_left = Curl_timeleft(data, NULL, TRUE);
1729 if(time_left < 0L) {
1730 failf(data, "timed out before SSL handshake");
1731 result = CURLE_OPERATION_TIMEDOUT;
1735 /* Force the handshake now */
1736 timeout = PR_MillisecondsToInterval((PRUint32) time_left);
1737 if(SSL_ForceHandshakeWithTimeout(connssl->handle, timeout) != SECSuccess) {
1738 if(PR_GetError() == PR_WOULD_BLOCK_ERROR)
1739 /* blocking direction is updated by nss_update_connecting_state() */
1741 else if(conn->data->set.ssl.certverifyresult == SSL_ERROR_BAD_CERT_DOMAIN)
1742 result = CURLE_PEER_FAILED_VERIFICATION;
1743 else if(conn->data->set.ssl.certverifyresult!=0)
1744 result = CURLE_SSL_CACERT;
1748 result = display_conn_info(conn, connssl->handle);
1752 if(data->set.str[STRING_SSL_ISSUERCERT]) {
1753 SECStatus ret = SECFailure;
1754 char *nickname = dup_nickname(data, STRING_SSL_ISSUERCERT);
1756 /* we support only nicknames in case of STRING_SSL_ISSUERCERT for now */
1757 ret = check_issuer_cert(connssl->handle, nickname);
1761 if(SECFailure == ret) {
1762 infof(data,"SSL certificate issuer check failed\n");
1763 result = CURLE_SSL_ISSUER_ERROR;
1767 infof(data, "SSL certificate issuer check ok\n");
1774 return nss_fail_connect(connssl, data, result);
1777 static CURLcode nss_connect_common(struct connectdata *conn, int sockindex,
1780 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1781 struct SessionHandle *data = conn->data;
1782 const bool blocking = (done == NULL);
1785 if(connssl->state == ssl_connection_complete)
1788 if(connssl->connecting_state == ssl_connect_1) {
1789 result = nss_setup_connect(conn, sockindex);
1791 /* we do not expect CURLE_AGAIN from nss_setup_connect() */
1795 /* in non-blocking mode, set NSS non-blocking mode before handshake */
1796 result = nss_set_nonblock(connssl, data);
1801 connssl->connecting_state = ssl_connect_2;
1804 result = nss_do_connect(conn, sockindex);
1810 /* CURLE_AGAIN in non-blocking mode is not an error */
1818 /* in blocking mode, set NSS non-blocking mode _after_ SSL handshake */
1819 result = nss_set_nonblock(connssl, data);
1824 /* signal completed SSL handshake */
1827 connssl->state = ssl_connection_complete;
1828 conn->recv[sockindex] = nss_recv;
1829 conn->send[sockindex] = nss_send;
1831 /* ssl_connect_done is never used outside, go back to the initial state */
1832 connssl->connecting_state = ssl_connect_1;
1837 CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex)
1839 return nss_connect_common(conn, sockindex, /* blocking */ NULL);
1842 CURLcode Curl_nss_connect_nonblocking(struct connectdata *conn,
1843 int sockindex, bool *done)
1845 return nss_connect_common(conn, sockindex, done);
1848 static ssize_t nss_send(struct connectdata *conn, /* connection data */
1849 int sockindex, /* socketindex */
1850 const void *mem, /* send this data */
1851 size_t len, /* amount to write */
1854 ssize_t rc = PR_Send(conn->ssl[sockindex].handle, mem, (int)len, 0,
1855 PR_INTERVAL_NO_WAIT);
1857 PRInt32 err = PR_GetError();
1858 if(err == PR_WOULD_BLOCK_ERROR)
1859 *curlcode = CURLE_AGAIN;
1861 /* print the error number and error string */
1862 const char *err_name = nss_error_to_name(err);
1863 infof(conn->data, "SSL write: error %d (%s)\n", err, err_name);
1865 /* print a human-readable message describing the error if available */
1866 nss_print_error_message(conn->data, err);
1868 *curlcode = (is_cc_error(err))
1869 ? CURLE_SSL_CERTPROBLEM
1876 return rc; /* number of bytes */
1879 static ssize_t nss_recv(struct connectdata * conn, /* connection data */
1880 int num, /* socketindex */
1881 char *buf, /* store read data here */
1882 size_t buffersize, /* max amount to read */
1885 ssize_t nread = PR_Recv(conn->ssl[num].handle, buf, (int)buffersize, 0,
1886 PR_INTERVAL_NO_WAIT);
1888 /* failed SSL read */
1889 PRInt32 err = PR_GetError();
1891 if(err == PR_WOULD_BLOCK_ERROR)
1892 *curlcode = CURLE_AGAIN;
1894 /* print the error number and error string */
1895 const char *err_name = nss_error_to_name(err);
1896 infof(conn->data, "SSL read: errno %d (%s)\n", err, err_name);
1898 /* print a human-readable message describing the error if available */
1899 nss_print_error_message(conn->data, err);
1901 *curlcode = (is_cc_error(err))
1902 ? CURLE_SSL_CERTPROBLEM
1912 size_t Curl_nss_version(char *buffer, size_t size)
1914 return snprintf(buffer, size, "NSS/%s", NSS_VERSION);
1917 int Curl_nss_seed(struct SessionHandle *data)
1919 /* make sure that NSS is initialized */
1920 return !!Curl_nss_force_init(data);
1923 /* data might be NULL */
1924 int Curl_nss_random(struct SessionHandle *data,
1925 unsigned char *entropy,
1929 Curl_nss_seed(data); /* Initiate the seed if not already done */
1931 if(SECSuccess != PK11_GenerateRandom(entropy, curlx_uztosi(length))) {
1932 /* no way to signal a failure from here, we have to abort */
1933 failf(data, "PK11_GenerateRandom() failed, calling abort()...");
1940 void Curl_nss_md5sum(unsigned char *tmp, /* input */
1942 unsigned char *md5sum, /* output */
1945 PK11Context *MD5pw = PK11_CreateDigestContext(SEC_OID_MD5);
1946 unsigned int MD5out;
1948 PK11_DigestOp(MD5pw, tmp, curlx_uztoui(tmplen));
1949 PK11_DigestFinal(MD5pw, md5sum, &MD5out, curlx_uztoui(md5len));
1950 PK11_DestroyContext(MD5pw, PR_TRUE);
1953 bool Curl_nss_cert_status_request(void)
1955 #ifdef SSL_ENABLE_OCSP_STAPLING
1962 #endif /* USE_NSS */