1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2014, 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 #include "curl_memory.h"
68 /* The last #include file should be: */
71 #define SSL_DIR "/etc/pki/nssdb"
73 /* enough to fit the string "PEM Token #[0|1]" */
76 PRFileDesc *PR_ImportTCPSocket(PRInt32 osfd);
78 PRLock * nss_initlock = NULL;
79 PRLock * nss_crllock = NULL;
80 NSSInitContext * nss_context = NULL;
82 volatile int initialized = 0;
89 #define PK11_SETATTRS(_attr, _idx, _type, _val, _len) do { \
90 CK_ATTRIBUTE *ptr = (_attr) + ((_idx)++); \
91 ptr->type = (_type); \
92 ptr->pValue = (_val); \
93 ptr->ulValueLen = (_len); \
96 #define CERT_NewTempCertificate __CERT_NewTempCertificate
98 #define NUM_OF_CIPHERS sizeof(cipherlist)/sizeof(cipherlist[0])
99 static const cipher_s cipherlist[] = {
100 /* SSL2 cipher suites */
101 {"rc4", SSL_EN_RC4_128_WITH_MD5},
102 {"rc4-md5", SSL_EN_RC4_128_WITH_MD5},
103 {"rc4export", SSL_EN_RC4_128_EXPORT40_WITH_MD5},
104 {"rc2", SSL_EN_RC2_128_CBC_WITH_MD5},
105 {"rc2export", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5},
106 {"des", SSL_EN_DES_64_CBC_WITH_MD5},
107 {"desede3", SSL_EN_DES_192_EDE3_CBC_WITH_MD5},
108 /* SSL3/TLS cipher suites */
109 {"rsa_rc4_128_md5", SSL_RSA_WITH_RC4_128_MD5},
110 {"rsa_rc4_128_sha", SSL_RSA_WITH_RC4_128_SHA},
111 {"rsa_3des_sha", SSL_RSA_WITH_3DES_EDE_CBC_SHA},
112 {"rsa_des_sha", SSL_RSA_WITH_DES_CBC_SHA},
113 {"rsa_rc4_40_md5", SSL_RSA_EXPORT_WITH_RC4_40_MD5},
114 {"rsa_rc2_40_md5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5},
115 {"rsa_null_md5", SSL_RSA_WITH_NULL_MD5},
116 {"rsa_null_sha", SSL_RSA_WITH_NULL_SHA},
117 {"fips_3des_sha", SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA},
118 {"fips_des_sha", SSL_RSA_FIPS_WITH_DES_CBC_SHA},
119 {"fortezza", SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA},
120 {"fortezza_rc4_128_sha", SSL_FORTEZZA_DMS_WITH_RC4_128_SHA},
121 {"fortezza_null", SSL_FORTEZZA_DMS_WITH_NULL_SHA},
122 /* TLS 1.0: Exportable 56-bit Cipher Suites. */
123 {"rsa_des_56_sha", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA},
124 {"rsa_rc4_56_sha", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA},
126 {"dhe_dss_aes_128_cbc_sha", TLS_DHE_DSS_WITH_AES_128_CBC_SHA},
127 {"dhe_dss_aes_256_cbc_sha", TLS_DHE_DSS_WITH_AES_256_CBC_SHA},
128 {"dhe_rsa_aes_128_cbc_sha", TLS_DHE_RSA_WITH_AES_128_CBC_SHA},
129 {"dhe_rsa_aes_256_cbc_sha", TLS_DHE_RSA_WITH_AES_256_CBC_SHA},
130 {"rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA},
131 {"rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA},
133 {"ecdh_ecdsa_null_sha", TLS_ECDH_ECDSA_WITH_NULL_SHA},
134 {"ecdh_ecdsa_rc4_128_sha", TLS_ECDH_ECDSA_WITH_RC4_128_SHA},
135 {"ecdh_ecdsa_3des_sha", TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA},
136 {"ecdh_ecdsa_aes_128_sha", TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA},
137 {"ecdh_ecdsa_aes_256_sha", TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA},
138 {"ecdhe_ecdsa_null_sha", TLS_ECDHE_ECDSA_WITH_NULL_SHA},
139 {"ecdhe_ecdsa_rc4_128_sha", TLS_ECDHE_ECDSA_WITH_RC4_128_SHA},
140 {"ecdhe_ecdsa_3des_sha", TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA},
141 {"ecdhe_ecdsa_aes_128_sha", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA},
142 {"ecdhe_ecdsa_aes_256_sha", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA},
143 {"ecdh_rsa_null_sha", TLS_ECDH_RSA_WITH_NULL_SHA},
144 {"ecdh_rsa_128_sha", TLS_ECDH_RSA_WITH_RC4_128_SHA},
145 {"ecdh_rsa_3des_sha", TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA},
146 {"ecdh_rsa_aes_128_sha", TLS_ECDH_RSA_WITH_AES_128_CBC_SHA},
147 {"ecdh_rsa_aes_256_sha", TLS_ECDH_RSA_WITH_AES_256_CBC_SHA},
148 {"echde_rsa_null", TLS_ECDHE_RSA_WITH_NULL_SHA},
149 {"ecdhe_rsa_rc4_128_sha", TLS_ECDHE_RSA_WITH_RC4_128_SHA},
150 {"ecdhe_rsa_3des_sha", TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA},
151 {"ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
152 {"ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA},
153 {"ecdh_anon_null_sha", TLS_ECDH_anon_WITH_NULL_SHA},
154 {"ecdh_anon_rc4_128sha", TLS_ECDH_anon_WITH_RC4_128_SHA},
155 {"ecdh_anon_3des_sha", TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA},
156 {"ecdh_anon_aes_128_sha", TLS_ECDH_anon_WITH_AES_128_CBC_SHA},
157 {"ecdh_anon_aes_256_sha", TLS_ECDH_anon_WITH_AES_256_CBC_SHA},
158 #ifdef TLS_RSA_WITH_NULL_SHA256
159 /* new HMAC-SHA256 cipher suites specified in RFC */
160 {"rsa_null_sha_256", TLS_RSA_WITH_NULL_SHA256},
161 {"rsa_aes_128_cbc_sha_256", TLS_RSA_WITH_AES_128_CBC_SHA256},
162 {"rsa_aes_256_cbc_sha_256", TLS_RSA_WITH_AES_256_CBC_SHA256},
163 {"dhe_rsa_aes_128_cbc_sha_256", TLS_DHE_RSA_WITH_AES_128_CBC_SHA256},
164 {"dhe_rsa_aes_256_cbc_sha_256", TLS_DHE_RSA_WITH_AES_256_CBC_SHA256},
165 {"ecdhe_ecdsa_aes_128_cbc_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256},
166 {"ecdhe_rsa_aes_128_cbc_sha_256", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256},
168 #ifdef TLS_RSA_WITH_AES_128_GCM_SHA256
169 /* AES GCM cipher suites in RFC 5288 and RFC 5289 */
170 {"rsa_aes_128_gcm_sha_256", TLS_RSA_WITH_AES_128_GCM_SHA256},
171 {"dhe_rsa_aes_128_gcm_sha_256", TLS_DHE_RSA_WITH_AES_128_GCM_SHA256},
172 {"dhe_dss_aes_128_gcm_sha_256", TLS_DHE_DSS_WITH_AES_128_GCM_SHA256},
173 {"ecdhe_ecdsa_aes_128_gcm_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
174 {"ecdh_ecdsa_aes_128_gcm_sha_256", TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256},
175 {"ecdhe_rsa_aes_128_gcm_sha_256", TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
176 {"ecdh_rsa_aes_128_gcm_sha_256", TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256},
180 static const char* pem_library = "libnsspem.so";
181 SECMODModule* mod = NULL;
183 /* NSPR I/O layer we use to detect blocking direction during SSL handshake */
184 static PRDescIdentity nspr_io_identity = PR_INVALID_IO_LAYER;
185 static PRIOMethods nspr_io_methods;
187 static const char* nss_error_to_name(PRErrorCode code)
189 const char *name = PR_ErrorToName(code);
193 return "unknown error";
196 static void nss_print_error_message(struct SessionHandle *data, PRUint32 err)
198 failf(data, "%s", PR_ErrorToString(err, PR_LANGUAGE_I_DEFAULT));
201 static SECStatus set_ciphers(struct SessionHandle *data, PRFileDesc * model,
205 PRBool cipher_state[NUM_OF_CIPHERS];
209 /* First disable all ciphers. This uses a different max value in case
210 * NSS adds more ciphers later we don't want them available by
213 for(i=0; i<SSL_NumImplementedCiphers; i++) {
214 SSL_CipherPrefSet(model, SSL_ImplementedCiphers[i], PR_FALSE);
217 /* Set every entry in our list to false */
218 for(i=0; i<NUM_OF_CIPHERS; i++) {
219 cipher_state[i] = PR_FALSE;
222 cipher = cipher_list;
224 while(cipher_list && (cipher_list[0])) {
225 while((*cipher) && (ISSPACE(*cipher)))
228 if((cipher_list = strchr(cipher, ','))) {
229 *cipher_list++ = '\0';
234 for(i=0; i<NUM_OF_CIPHERS; i++) {
235 if(Curl_raw_equal(cipher, cipherlist[i].name)) {
236 cipher_state[i] = PR_TRUE;
242 if(found == PR_FALSE) {
243 failf(data, "Unknown cipher in list: %s", cipher);
248 cipher = cipher_list;
252 /* Finally actually enable the selected ciphers */
253 for(i=0; i<NUM_OF_CIPHERS; i++) {
257 if(SSL_CipherPrefSet(model, cipherlist[i].num, PR_TRUE) != SECSuccess) {
258 failf(data, "cipher-suite not supported by NSS: %s", cipherlist[i].name);
267 * Get the number of ciphers that are enabled. We use this to determine
268 * if we need to call NSS_SetDomesticPolicy() to enable the default ciphers.
270 static int num_enabled_ciphers(void)
276 for(i=0; i<NUM_OF_CIPHERS; i++) {
277 SSL_CipherPolicyGet(cipherlist[i].num, &policy);
285 * Determine whether the nickname passed in is a filename that needs to
286 * be loaded as a PEM or a regular NSS nickname.
288 * returns 1 for a file
289 * returns 0 for not a file (NSS nickname)
291 static int is_file(const char *filename)
298 if(stat(filename, &st) == 0)
299 if(S_ISREG(st.st_mode))
305 /* Check if the given string is filename or nickname of a certificate. If the
306 * given string is recognized as filename, return NULL. If the given string is
307 * recognized as nickname, return a duplicated string. The returned string
308 * should be later deallocated using free(). If the OOM failure occurs, we
311 static char* dup_nickname(struct SessionHandle *data, enum dupstring cert_kind)
313 const char *str = data->set.str[cert_kind];
317 /* no such file exists, use the string as nickname */
320 /* search the last slash; we require at least one slash in a file name */
321 n = strrchr(str, '/');
323 infof(data, "warning: certificate file name \"%s\" handled as nickname; "
324 "please use \"./%s\" to force file name\n", str, str);
328 /* we'll use the PEM reader to read the certificate from file */
332 /* Call PK11_CreateGenericObject() with the given obj_class and filename. If
333 * the call succeeds, append the object handle to the list of objects so that
334 * the object can be destroyed in Curl_nss_close(). */
335 static CURLcode nss_create_object(struct ssl_connect_data *ssl,
336 CK_OBJECT_CLASS obj_class,
337 const char *filename, bool cacert)
340 PK11GenericObject *obj;
341 CK_BBOOL cktrue = CK_TRUE;
342 CK_BBOOL ckfalse = CK_FALSE;
343 CK_ATTRIBUTE attrs[/* max count of attributes */ 4];
345 CURLcode err = (cacert)
346 ? CURLE_SSL_CACERT_BADFILE
347 : CURLE_SSL_CERTPROBLEM;
349 const int slot_id = (cacert) ? 0 : 1;
350 char *slot_name = aprintf("PEM Token #%d", slot_id);
352 return CURLE_OUT_OF_MEMORY;
354 slot = PK11_FindSlotByName(slot_name);
359 PK11_SETATTRS(attrs, attr_cnt, CKA_CLASS, &obj_class, sizeof(obj_class));
360 PK11_SETATTRS(attrs, attr_cnt, CKA_TOKEN, &cktrue, sizeof(CK_BBOOL));
361 PK11_SETATTRS(attrs, attr_cnt, CKA_LABEL, (unsigned char *)filename,
362 strlen(filename) + 1);
364 if(CKO_CERTIFICATE == obj_class) {
365 CK_BBOOL *pval = (cacert) ? (&cktrue) : (&ckfalse);
366 PK11_SETATTRS(attrs, attr_cnt, CKA_TRUST, pval, sizeof(*pval));
369 obj = PK11_CreateGenericObject(slot, attrs, attr_cnt, PR_FALSE);
374 if(!Curl_llist_insert_next(ssl->obj_list, ssl->obj_list->tail, obj)) {
375 PK11_DestroyGenericObject(obj);
376 return CURLE_OUT_OF_MEMORY;
379 if(!cacert && CKO_CERTIFICATE == obj_class)
380 /* store reference to a client certificate */
381 ssl->obj_clicert = obj;
386 /* Destroy the NSS object whose handle is given by ptr. This function is
387 * a callback of Curl_llist_alloc() used by Curl_llist_destroy() to destroy
388 * NSS objects in Curl_nss_close() */
389 static void nss_destroy_object(void *user, void *ptr)
391 PK11GenericObject *obj = (PK11GenericObject *)ptr;
393 PK11_DestroyGenericObject(obj);
396 static CURLcode nss_load_cert(struct ssl_connect_data *ssl,
397 const char *filename, PRBool cacert)
399 CURLcode err = (cacert)
400 ? CURLE_SSL_CACERT_BADFILE
401 : CURLE_SSL_CERTPROBLEM;
403 /* libnsspem.so leaks memory if the requested file does not exist. For more
404 * details, go to <https://bugzilla.redhat.com/734760>. */
405 if(is_file(filename))
406 err = nss_create_object(ssl, CKO_CERTIFICATE, filename, cacert);
408 if(CURLE_OK == err && !cacert) {
409 /* we have successfully loaded a client certificate */
410 CERTCertificate *cert;
411 char *nickname = NULL;
412 char *n = strrchr(filename, '/');
416 /* The following undocumented magic helps to avoid a SIGSEGV on call
417 * of PK11_ReadRawAttribute() from SelectClientCert() when using an
418 * immature version of libnsspem.so. For more details, go to
419 * <https://bugzilla.redhat.com/733685>. */
420 nickname = aprintf("PEM Token #1:%s", n);
422 cert = PK11_FindCertFromNickname(nickname, NULL);
424 CERT_DestroyCertificate(cert);
433 /* add given CRL to cache if it is not already there */
434 static CURLcode nss_cache_crl(SECItem *crl_der)
436 CERTCertDBHandle *db = CERT_GetDefaultCertDB();
437 CERTSignedCrl *crl = SEC_FindCrlByDERCert(db, crl_der, 0);
439 /* CRL already cached */
441 SECITEM_FreeItem(crl_der, PR_TRUE);
442 return CURLE_SSL_CRL_BADFILE;
445 /* acquire lock before call of CERT_CacheCRL() */
446 PR_Lock(nss_crllock);
447 if(SECSuccess != CERT_CacheCRL(db, crl_der)) {
448 /* unable to cache CRL */
449 PR_Unlock(nss_crllock);
450 SECITEM_FreeItem(crl_der, PR_TRUE);
451 return CURLE_SSL_CRL_BADFILE;
454 /* we need to clear session cache, so that the CRL could take effect */
455 SSL_ClearSessionCache();
456 PR_Unlock(nss_crllock);
460 static CURLcode nss_load_crl(const char* crlfilename)
464 SECItem filedata = { 0, NULL, 0 };
465 SECItem *crl_der = NULL;
468 infile = PR_Open(crlfilename, PR_RDONLY, 0);
470 return CURLE_SSL_CRL_BADFILE;
472 if(PR_SUCCESS != PR_GetOpenFileInfo(infile, &info))
475 if(!SECITEM_AllocItem(NULL, &filedata, info.size + /* zero ended */ 1))
478 if(info.size != PR_Read(infile, filedata.data, info.size))
481 crl_der = SECITEM_AllocItem(NULL, NULL, 0U);
485 /* place a trailing zero right after the visible data */
486 body = (char*)filedata.data;
487 body[--filedata.len] = '\0';
489 body = strstr(body, "-----BEGIN");
493 char *begin = PORT_Strchr(body, '\n');
495 begin = PORT_Strchr(body, '\r');
499 trailer = strstr(++begin, "-----END");
503 /* retrieve DER from ASCII */
505 if(ATOB_ConvertAsciiToItem(crl_der, begin))
508 SECITEM_FreeItem(&filedata, PR_FALSE);
515 return nss_cache_crl(crl_der);
519 SECITEM_FreeItem(crl_der, PR_TRUE);
520 SECITEM_FreeItem(&filedata, PR_FALSE);
521 return CURLE_SSL_CRL_BADFILE;
524 static CURLcode nss_load_key(struct connectdata *conn, int sockindex,
530 struct ssl_connect_data *ssl = conn->ssl;
531 (void)sockindex; /* unused */
533 rv = nss_create_object(ssl, CKO_PRIVATE_KEY, key_file, FALSE);
535 PR_SetError(SEC_ERROR_BAD_KEY, 0);
539 slot = PK11_FindSlotByName("PEM Token #1");
541 return CURLE_SSL_CERTPROBLEM;
543 /* This will force the token to be seen as re-inserted */
544 SECMOD_WaitForAnyTokenEvent(mod, 0, 0);
545 PK11_IsPresent(slot);
547 status = PK11_Authenticate(slot, PR_TRUE,
548 conn->data->set.str[STRING_KEY_PASSWD]);
550 return (SECSuccess == status)
552 : CURLE_SSL_CERTPROBLEM;
555 static int display_error(struct connectdata *conn, PRInt32 err,
556 const char *filename)
559 case SEC_ERROR_BAD_PASSWORD:
560 failf(conn->data, "Unable to load client key: Incorrect password");
562 case SEC_ERROR_UNKNOWN_CERT:
563 failf(conn->data, "Unable to load certificate %s", filename);
568 return 0; /* The caller will print a generic error */
571 static CURLcode cert_stuff(struct connectdata *conn, int sockindex,
572 char *cert_file, char *key_file)
574 struct SessionHandle *data = conn->data;
578 rv = nss_load_cert(&conn->ssl[sockindex], cert_file, PR_FALSE);
580 const PRErrorCode err = PR_GetError();
581 if(!display_error(conn, err, cert_file)) {
582 const char *err_name = nss_error_to_name(err);
583 failf(data, "unable to load client cert: %d (%s)", err, err_name);
590 if(key_file || (is_file(cert_file))) {
592 rv = nss_load_key(conn, sockindex, key_file);
594 /* In case the cert file also has the key */
595 rv = nss_load_key(conn, sockindex, cert_file);
597 const PRErrorCode err = PR_GetError();
598 if(!display_error(conn, err, key_file)) {
599 const char *err_name = nss_error_to_name(err);
600 failf(data, "unable to load client key: %d (%s)", err, err_name);
610 static char * nss_get_password(PK11SlotInfo * slot, PRBool retry, void *arg)
612 (void)slot; /* unused */
613 if(retry || NULL == arg)
616 return (char *)PORT_Strdup((char *)arg);
619 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
621 static SECStatus nss_auth_cert_hook(void *arg, PRFileDesc *fd, PRBool checksig,
624 struct connectdata *conn = (struct connectdata *)arg;
625 if(!conn->data->set.ssl.verifypeer) {
626 infof(conn->data, "skipping SSL peer certificate verification\n");
630 return SSL_AuthCertificate(CERT_GetDefaultCertDB(), fd, checksig, isServer);
634 * Inform the application that the handshake is complete.
636 static void HandshakeCallback(PRFileDesc *sock, void *arg)
639 struct connectdata *conn = (struct connectdata*) arg;
640 unsigned int buflenmax = 50;
641 unsigned char buf[50];
643 SSLNextProtoState state;
645 if(!conn->data->set.ssl_enable_npn && !conn->data->set.ssl_enable_alpn) {
649 if(SSL_GetNextProto(sock, &state, buf, &buflen, buflenmax) == SECSuccess) {
652 case SSL_NEXT_PROTO_NO_SUPPORT:
653 case SSL_NEXT_PROTO_NO_OVERLAP:
654 infof(conn->data, "TLS, neither ALPN nor NPN succeeded\n");
656 #ifdef SSL_ENABLE_ALPN
657 case SSL_NEXT_PROTO_SELECTED:
658 infof(conn->data, "ALPN, server accepted to use %.*s\n", buflen, buf);
661 case SSL_NEXT_PROTO_NEGOTIATED:
662 infof(conn->data, "NPN, server accepted to use %.*s\n", buflen, buf);
666 if(buflen == NGHTTP2_PROTO_VERSION_ID_LEN &&
667 memcmp(NGHTTP2_PROTO_VERSION_ID, buf, NGHTTP2_PROTO_VERSION_ID_LEN)
669 conn->negnpn = NPN_HTTP2;
671 else if(buflen == ALPN_HTTP_1_1_LENGTH && memcmp(ALPN_HTTP_1_1, buf,
672 ALPN_HTTP_1_1_LENGTH)) {
673 conn->negnpn = NPN_HTTP1_1;
682 static void display_cert_info(struct SessionHandle *data,
683 CERTCertificate *cert)
685 char *subject, *issuer, *common_name;
686 PRExplodedTime printableTime;
687 char timeString[256];
688 PRTime notBefore, notAfter;
690 subject = CERT_NameToAscii(&cert->subject);
691 issuer = CERT_NameToAscii(&cert->issuer);
692 common_name = CERT_GetCommonName(&cert->subject);
693 infof(data, "\tsubject: %s\n", subject);
695 CERT_GetCertTimes(cert, ¬Before, ¬After);
696 PR_ExplodeTime(notBefore, PR_GMTParameters, &printableTime);
697 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
698 infof(data, "\tstart date: %s\n", timeString);
699 PR_ExplodeTime(notAfter, PR_GMTParameters, &printableTime);
700 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
701 infof(data, "\texpire date: %s\n", timeString);
702 infof(data, "\tcommon name: %s\n", common_name);
703 infof(data, "\tissuer: %s\n", issuer);
707 PR_Free(common_name);
710 static void display_conn_info(struct connectdata *conn, PRFileDesc *sock)
712 SSLChannelInfo channel;
713 SSLCipherSuiteInfo suite;
714 CERTCertificate *cert;
715 CERTCertificate *cert2;
716 CERTCertificate *cert3;
720 if(SSL_GetChannelInfo(sock, &channel, sizeof channel) ==
721 SECSuccess && channel.length == sizeof channel &&
722 channel.cipherSuite) {
723 if(SSL_GetCipherSuiteInfo(channel.cipherSuite,
724 &suite, sizeof suite) == SECSuccess) {
725 infof(conn->data, "SSL connection using %s\n", suite.cipherSuiteName);
729 cert = SSL_PeerCertificate(sock);
732 infof(conn->data, "Server certificate:\n");
734 if(!conn->data->set.ssl.certinfo) {
735 display_cert_info(conn->data, cert);
736 CERT_DestroyCertificate(cert);
739 /* Count certificates in chain. */
743 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
747 CERT_DestroyCertificate(cert2);
750 cert3 = CERT_FindCertIssuer(cert2, now, certUsageSSLCA);
751 CERT_DestroyCertificate(cert2);
755 Curl_ssl_init_certinfo(conn->data, i);
756 for(i = 0; cert; cert = cert2) {
757 Curl_extract_certinfo(conn, i++, (char *)cert->derCert.data,
758 (char *)cert->derCert.data + cert->derCert.len);
760 CERT_DestroyCertificate(cert);
763 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
764 CERT_DestroyCertificate(cert);
772 static SECStatus BadCertHandler(void *arg, PRFileDesc *sock)
774 struct connectdata *conn = (struct connectdata *)arg;
775 struct SessionHandle *data = conn->data;
776 PRErrorCode err = PR_GetError();
777 CERTCertificate *cert;
779 /* remember the cert verification result */
780 data->set.ssl.certverifyresult = err;
782 if(err == SSL_ERROR_BAD_CERT_DOMAIN && !data->set.ssl.verifyhost)
783 /* we are asked not to verify the host name */
786 /* print only info about the cert, the error is printed off the callback */
787 cert = SSL_PeerCertificate(sock);
789 infof(data, "Server certificate:\n");
790 display_cert_info(data, cert);
791 CERT_DestroyCertificate(cert);
799 * Check that the Peer certificate's issuer certificate matches the one found
800 * by issuer_nickname. This is not exactly the way OpenSSL and GNU TLS do the
801 * issuer check, so we provide comments that mimic the OpenSSL
802 * X509_check_issued function (in x509v3/v3_purp.c)
804 static SECStatus check_issuer_cert(PRFileDesc *sock,
805 char *issuer_nickname)
807 CERTCertificate *cert,*cert_issuer,*issuer;
808 SECStatus res=SECSuccess;
809 void *proto_win = NULL;
812 PRArenaPool *tmpArena = NULL;
813 CERTAuthKeyID *authorityKeyID = NULL;
814 SECITEM *caname = NULL;
817 cert = SSL_PeerCertificate(sock);
818 cert_issuer = CERT_FindCertIssuer(cert,PR_Now(),certUsageObjectSigner);
820 proto_win = SSL_RevealPinArg(sock);
821 issuer = PK11_FindCertFromNickname(issuer_nickname, proto_win);
823 if((!cert_issuer) || (!issuer))
825 else if(SECITEM_CompareItem(&cert_issuer->derCert,
826 &issuer->derCert)!=SECEqual)
829 CERT_DestroyCertificate(cert);
830 CERT_DestroyCertificate(issuer);
831 CERT_DestroyCertificate(cert_issuer);
837 * Callback to pick the SSL client certificate.
839 static SECStatus SelectClientCert(void *arg, PRFileDesc *sock,
840 struct CERTDistNamesStr *caNames,
841 struct CERTCertificateStr **pRetCert,
842 struct SECKEYPrivateKeyStr **pRetKey)
844 struct ssl_connect_data *connssl = (struct ssl_connect_data *)arg;
845 struct SessionHandle *data = connssl->data;
846 const char *nickname = connssl->client_nickname;
848 if(connssl->obj_clicert) {
849 /* use the cert/key provided by PEM reader */
850 static const char pem_slotname[] = "PEM Token #1";
851 SECItem cert_der = { 0, NULL, 0 };
852 void *proto_win = SSL_RevealPinArg(sock);
853 struct CERTCertificateStr *cert;
854 struct SECKEYPrivateKeyStr *key;
856 PK11SlotInfo *slot = PK11_FindSlotByName(pem_slotname);
858 failf(data, "NSS: PK11 slot not found: %s", pem_slotname);
862 if(PK11_ReadRawAttribute(PK11_TypeGeneric, connssl->obj_clicert, CKA_VALUE,
863 &cert_der) != SECSuccess) {
864 failf(data, "NSS: CKA_VALUE not found in PK11 generic object");
869 cert = PK11_FindCertFromDERCertItem(slot, &cert_der, proto_win);
870 SECITEM_FreeItem(&cert_der, PR_FALSE);
872 failf(data, "NSS: client certificate from file not found");
877 key = PK11_FindPrivateKeyFromCert(slot, cert, NULL);
880 failf(data, "NSS: private key from file not found");
881 CERT_DestroyCertificate(cert);
885 infof(data, "NSS: client certificate from file\n");
886 display_cert_info(data, cert);
893 /* use the default NSS hook */
894 if(SECSuccess != NSS_GetClientAuthData((void *)nickname, sock, caNames,
896 || NULL == *pRetCert) {
899 failf(data, "NSS: client certificate not found (nickname not "
902 failf(data, "NSS: client certificate not found: %s", nickname);
907 /* get certificate nickname if any */
908 nickname = (*pRetCert)->nickname;
910 nickname = "[unknown]";
912 if(NULL == *pRetKey) {
913 failf(data, "NSS: private key not found for certificate: %s", nickname);
917 infof(data, "NSS: using client certificate: %s\n", nickname);
918 display_cert_info(data, *pRetCert);
922 /* This function is supposed to decide, which error codes should be used
923 * to conclude server is TLS intolerant.
925 * taken from xulrunner - nsNSSIOLayer.cpp
928 isTLSIntoleranceError(PRInt32 err)
931 case SSL_ERROR_BAD_MAC_ALERT:
932 case SSL_ERROR_BAD_MAC_READ:
933 case SSL_ERROR_HANDSHAKE_FAILURE_ALERT:
934 case SSL_ERROR_HANDSHAKE_UNEXPECTED_ALERT:
935 case SSL_ERROR_CLIENT_KEY_EXCHANGE_FAILURE:
936 case SSL_ERROR_ILLEGAL_PARAMETER_ALERT:
937 case SSL_ERROR_NO_CYPHER_OVERLAP:
938 case SSL_ERROR_BAD_SERVER:
939 case SSL_ERROR_BAD_BLOCK_PADDING:
940 case SSL_ERROR_UNSUPPORTED_VERSION:
941 case SSL_ERROR_PROTOCOL_VERSION_ALERT:
942 case SSL_ERROR_RX_MALFORMED_FINISHED:
943 case SSL_ERROR_BAD_HANDSHAKE_HASH_VALUE:
944 case SSL_ERROR_DECODE_ERROR_ALERT:
945 case SSL_ERROR_RX_UNKNOWN_ALERT:
952 /* update blocking direction in case of PR_WOULD_BLOCK_ERROR */
953 static void nss_update_connecting_state(ssl_connect_state state, void *secret)
955 struct ssl_connect_data *connssl = (struct ssl_connect_data *)secret;
956 if(PR_GetError() != PR_WOULD_BLOCK_ERROR)
957 /* an unrelated error is passing by */
960 switch(connssl->connecting_state) {
962 case ssl_connect_2_reading:
963 case ssl_connect_2_writing:
966 /* we are not called from an SSL handshake */
970 /* update the state accordingly */
971 connssl->connecting_state = state;
974 /* recv() wrapper we use to detect blocking direction during SSL handshake */
975 static PRInt32 nspr_io_recv(PRFileDesc *fd, void *buf, PRInt32 amount,
976 PRIntn flags, PRIntervalTime timeout)
978 const PRRecvFN recv_fn = fd->lower->methods->recv;
979 const PRInt32 rv = recv_fn(fd->lower, buf, amount, flags, timeout);
981 /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */
982 nss_update_connecting_state(ssl_connect_2_reading, fd->secret);
986 /* send() wrapper we use to detect blocking direction during SSL handshake */
987 static PRInt32 nspr_io_send(PRFileDesc *fd, const void *buf, PRInt32 amount,
988 PRIntn flags, PRIntervalTime timeout)
990 const PRSendFN send_fn = fd->lower->methods->send;
991 const PRInt32 rv = send_fn(fd->lower, buf, amount, flags, timeout);
993 /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */
994 nss_update_connecting_state(ssl_connect_2_writing, fd->secret);
998 /* close() wrapper to avoid assertion failure due to fd->secret != NULL */
999 static PRStatus nspr_io_close(PRFileDesc *fd)
1001 const PRCloseFN close_fn = PR_GetDefaultIOMethods()->close;
1003 return close_fn(fd);
1006 static CURLcode nss_init_core(struct SessionHandle *data, const char *cert_dir)
1008 NSSInitParameters initparams;
1010 if(nss_context != NULL)
1013 memset((void *) &initparams, '\0', sizeof(initparams));
1014 initparams.length = sizeof(initparams);
1017 const bool use_sql = NSS_VersionCheck("3.12.0");
1018 char *certpath = aprintf("%s%s", use_sql ? "sql:" : "", cert_dir);
1020 return CURLE_OUT_OF_MEMORY;
1022 infof(data, "Initializing NSS with certpath: %s\n", certpath);
1023 nss_context = NSS_InitContext(certpath, "", "", "", &initparams,
1024 NSS_INIT_READONLY | NSS_INIT_PK11RELOAD);
1027 if(nss_context != NULL)
1030 infof(data, "Unable to initialize NSS database\n");
1033 infof(data, "Initializing NSS with certpath: none\n");
1034 nss_context = NSS_InitContext("", "", "", "", &initparams, NSS_INIT_READONLY
1035 | NSS_INIT_NOCERTDB | NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN
1036 | NSS_INIT_NOROOTINIT | NSS_INIT_OPTIMIZESPACE | NSS_INIT_PK11RELOAD);
1037 if(nss_context != NULL)
1040 infof(data, "Unable to initialize NSS\n");
1041 return CURLE_SSL_CACERT_BADFILE;
1044 static CURLcode nss_init(struct SessionHandle *data)
1053 /* First we check if $SSL_DIR points to a valid dir */
1054 cert_dir = getenv("SSL_DIR");
1056 if((stat(cert_dir, &st) != 0) ||
1057 (!S_ISDIR(st.st_mode))) {
1062 /* Now we check if the default location is a valid dir */
1064 if((stat(SSL_DIR, &st) == 0) &&
1065 (S_ISDIR(st.st_mode))) {
1066 cert_dir = (char *)SSL_DIR;
1070 if(nspr_io_identity == PR_INVALID_IO_LAYER) {
1071 /* allocate an identity for our own NSPR I/O layer */
1072 nspr_io_identity = PR_GetUniqueIdentity("libcurl");
1073 if(nspr_io_identity == PR_INVALID_IO_LAYER)
1074 return CURLE_OUT_OF_MEMORY;
1076 /* the default methods just call down to the lower I/O layer */
1077 memcpy(&nspr_io_methods, PR_GetDefaultIOMethods(), sizeof nspr_io_methods);
1079 /* override certain methods in the table by our wrappers */
1080 nspr_io_methods.recv = nspr_io_recv;
1081 nspr_io_methods.send = nspr_io_send;
1082 nspr_io_methods.close = nspr_io_close;
1085 rv = nss_init_core(data, cert_dir);
1089 if(num_enabled_ciphers() == 0)
1090 NSS_SetDomesticPolicy();
1099 * @retval 0 error initializing SSL
1100 * @retval 1 SSL initialized successfully
1102 int Curl_nss_init(void)
1104 /* curl_global_init() is not thread-safe so this test is ok */
1105 if(nss_initlock == NULL) {
1106 PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256);
1107 nss_initlock = PR_NewLock();
1108 nss_crllock = PR_NewLock();
1111 /* We will actually initialize NSS later */
1116 CURLcode Curl_nss_force_init(struct SessionHandle *data)
1121 "unable to initialize NSS, curl_global_init() should have been "
1122 "called with CURL_GLOBAL_SSL or CURL_GLOBAL_ALL");
1123 return CURLE_FAILED_INIT;
1126 PR_Lock(nss_initlock);
1127 rv = nss_init(data);
1128 PR_Unlock(nss_initlock);
1132 /* Global cleanup */
1133 void Curl_nss_cleanup(void)
1135 /* This function isn't required to be threadsafe and this is only done
1136 * as a safety feature.
1138 PR_Lock(nss_initlock);
1140 /* Free references to client certificates held in the SSL session cache.
1141 * Omitting this hampers destruction of the security module owning
1142 * the certificates. */
1143 SSL_ClearSessionCache();
1145 if(mod && SECSuccess == SECMOD_UnloadUserModule(mod)) {
1146 SECMOD_DestroyModule(mod);
1149 NSS_ShutdownContext(nss_context);
1152 PR_Unlock(nss_initlock);
1154 PR_DestroyLock(nss_initlock);
1155 PR_DestroyLock(nss_crllock);
1156 nss_initlock = NULL;
1162 * This function uses SSL_peek to determine connection status.
1165 * 1 means the connection is still in place
1166 * 0 means the connection has been closed
1167 * -1 means the connection status is unknown
1170 Curl_nss_check_cxn(struct connectdata *conn)
1176 PR_Recv(conn->ssl[FIRSTSOCKET].handle, (void *)&buf, 1, PR_MSG_PEEK,
1177 PR_SecondsToInterval(1));
1179 return 1; /* connection still in place */
1182 return 0; /* connection has been closed */
1184 return -1; /* connection status unknown */
1188 * This function is called when an SSL connection is closed.
1190 void Curl_nss_close(struct connectdata *conn, int sockindex)
1192 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1194 if(connssl->handle) {
1195 /* NSS closes the socket we previously handed to it, so we must mark it
1196 as closed to avoid double close */
1197 fake_sclose(conn->sock[sockindex]);
1198 conn->sock[sockindex] = CURL_SOCKET_BAD;
1200 if((connssl->client_nickname != NULL) || (connssl->obj_clicert != NULL))
1201 /* A server might require different authentication based on the
1202 * particular path being requested by the client. To support this
1203 * scenario, we must ensure that a connection will never reuse the
1204 * authentication data from a previous connection. */
1205 SSL_InvalidateSession(connssl->handle);
1207 if(connssl->client_nickname != NULL) {
1208 free(connssl->client_nickname);
1209 connssl->client_nickname = NULL;
1211 /* destroy all NSS objects in order to avoid failure of NSS shutdown */
1212 Curl_llist_destroy(connssl->obj_list, NULL);
1213 connssl->obj_list = NULL;
1214 connssl->obj_clicert = NULL;
1216 PR_Close(connssl->handle);
1217 connssl->handle = NULL;
1222 * This function is called when the 'data' struct is going away. Close
1223 * down everything and free all resources!
1225 int Curl_nss_close_all(struct SessionHandle *data)
1231 /* return true if NSS can provide error code (and possibly msg) for the
1233 static bool is_nss_error(CURLcode err)
1236 case CURLE_PEER_FAILED_VERIFICATION:
1237 case CURLE_SSL_CACERT:
1238 case CURLE_SSL_CERTPROBLEM:
1239 case CURLE_SSL_CONNECT_ERROR:
1240 case CURLE_SSL_ISSUER_ERROR:
1248 /* return true if the given error code is related to a client certificate */
1249 static bool is_cc_error(PRInt32 err)
1252 case SSL_ERROR_BAD_CERT_ALERT:
1253 case SSL_ERROR_EXPIRED_CERT_ALERT:
1254 case SSL_ERROR_REVOKED_CERT_ALERT:
1262 static Curl_recv nss_recv;
1263 static Curl_send nss_send;
1265 static CURLcode nss_load_ca_certificates(struct connectdata *conn,
1268 struct SessionHandle *data = conn->data;
1269 const char *cafile = data->set.ssl.CAfile;
1270 const char *capath = data->set.ssl.CApath;
1273 CURLcode rv = nss_load_cert(&conn->ssl[sockindex], cafile, PR_TRUE);
1280 if(stat(capath, &st) == -1)
1281 return CURLE_SSL_CACERT_BADFILE;
1283 if(S_ISDIR(st.st_mode)) {
1285 PRDir *dir = PR_OpenDir(capath);
1287 return CURLE_SSL_CACERT_BADFILE;
1289 while((entry = PR_ReadDir(dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN))) {
1290 char *fullpath = aprintf("%s/%s", capath, entry->name);
1293 return CURLE_OUT_OF_MEMORY;
1296 if(CURLE_OK != nss_load_cert(&conn->ssl[sockindex], fullpath, PR_TRUE))
1297 /* This is purposefully tolerant of errors so non-PEM files can
1298 * be in the same directory */
1299 infof(data, "failed to load '%s' from CURLOPT_CAPATH\n", fullpath);
1307 infof(data, "warning: CURLOPT_CAPATH not a directory (%s)\n", capath);
1310 infof(data, " CAfile: %s\n CApath: %s\n",
1311 cafile ? cafile : "none",
1312 capath ? capath : "none");
1317 static CURLcode nss_init_sslver(SSLVersionRange *sslver,
1318 struct SessionHandle *data)
1320 switch (data->set.ssl.version) {
1322 case CURL_SSLVERSION_DEFAULT:
1323 sslver->min = SSL_LIBRARY_VERSION_3_0;
1324 if(data->state.ssl_connect_retry) {
1325 infof(data, "TLS disabled due to previous handshake failure\n");
1326 sslver->max = SSL_LIBRARY_VERSION_3_0;
1329 /* intentional fall-through to default to highest TLS version if possible */
1331 case CURL_SSLVERSION_TLSv1:
1332 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1333 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1334 #elif defined SSL_LIBRARY_VERSION_TLS_1_1
1335 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1337 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1341 case CURL_SSLVERSION_SSLv2:
1342 sslver->min = SSL_LIBRARY_VERSION_2;
1343 sslver->max = SSL_LIBRARY_VERSION_2;
1346 case CURL_SSLVERSION_SSLv3:
1347 sslver->min = SSL_LIBRARY_VERSION_3_0;
1348 sslver->max = SSL_LIBRARY_VERSION_3_0;
1351 case CURL_SSLVERSION_TLSv1_0:
1352 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1353 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1356 case CURL_SSLVERSION_TLSv1_1:
1357 #ifdef SSL_LIBRARY_VERSION_TLS_1_1
1358 sslver->min = SSL_LIBRARY_VERSION_TLS_1_1;
1359 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1364 case CURL_SSLVERSION_TLSv1_2:
1365 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1366 sslver->min = SSL_LIBRARY_VERSION_TLS_1_2;
1367 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1373 failf(data, "TLS minor version cannot be set");
1374 return CURLE_SSL_CONNECT_ERROR;
1377 static CURLcode nss_fail_connect(struct ssl_connect_data *connssl,
1378 struct SessionHandle *data,
1381 SSLVersionRange sslver;
1382 PRErrorCode err = 0;
1384 /* reset the flag to avoid an infinite loop */
1385 data->state.ssl_connect_retry = FALSE;
1387 if(is_nss_error(curlerr)) {
1388 /* read NSPR error code */
1389 err = PR_GetError();
1390 if(is_cc_error(err))
1391 curlerr = CURLE_SSL_CERTPROBLEM;
1393 /* print the error number and error string */
1394 infof(data, "NSS error %d (%s)\n", err, nss_error_to_name(err));
1396 /* print a human-readable message describing the error if available */
1397 nss_print_error_message(data, err);
1400 /* cleanup on connection failure */
1401 Curl_llist_destroy(connssl->obj_list, NULL);
1402 connssl->obj_list = NULL;
1405 && (SSL_VersionRangeGet(connssl->handle, &sslver) == SECSuccess)
1406 && (sslver.min == SSL_LIBRARY_VERSION_3_0)
1407 && (sslver.max != SSL_LIBRARY_VERSION_3_0)
1408 && isTLSIntoleranceError(err)) {
1409 /* schedule reconnect through Curl_retry_request() */
1410 data->state.ssl_connect_retry = TRUE;
1411 infof(data, "Error in TLS handshake, trying SSLv3...\n");
1418 /* Switch the SSL socket into non-blocking mode. */
1419 static CURLcode nss_set_nonblock(struct ssl_connect_data *connssl,
1420 struct SessionHandle *data)
1422 static PRSocketOptionData sock_opt;
1423 sock_opt.option = PR_SockOpt_Nonblocking;
1424 sock_opt.value.non_blocking = PR_TRUE;
1426 if(PR_SetSocketOption(connssl->handle, &sock_opt) != PR_SUCCESS)
1427 return nss_fail_connect(connssl, data, CURLE_SSL_CONNECT_ERROR);
1432 static CURLcode nss_setup_connect(struct connectdata *conn, int sockindex)
1434 PRFileDesc *model = NULL;
1435 PRFileDesc *nspr_io = NULL;
1436 PRFileDesc *nspr_io_stub = NULL;
1437 PRBool ssl_no_cache;
1438 PRBool ssl_cbc_random_iv;
1439 struct SessionHandle *data = conn->data;
1440 curl_socket_t sockfd = conn->sock[sockindex];
1441 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1444 SSLVersionRange sslver = {
1445 SSL_LIBRARY_VERSION_TLS_1_0, /* min */
1446 SSL_LIBRARY_VERSION_TLS_1_0 /* max */
1450 #if defined(SSL_ENABLE_NPN) || defined(SSL_ENABLE_ALPN)
1451 unsigned int alpn_protos_len = NGHTTP2_PROTO_VERSION_ID_LEN +
1452 ALPN_HTTP_1_1_LENGTH + 2;
1453 unsigned char alpn_protos[NGHTTP2_PROTO_VERSION_ID_LEN + ALPN_HTTP_1_1_LENGTH
1460 if(connssl->state == ssl_connection_complete)
1463 connssl->data = data;
1465 /* list of all NSS objects we need to destroy in Curl_nss_close() */
1466 connssl->obj_list = Curl_llist_alloc(nss_destroy_object);
1467 if(!connssl->obj_list)
1468 return CURLE_OUT_OF_MEMORY;
1470 /* FIXME. NSS doesn't support multiple databases open at the same time. */
1471 PR_Lock(nss_initlock);
1472 curlerr = nss_init(conn->data);
1473 if(CURLE_OK != curlerr) {
1474 PR_Unlock(nss_initlock);
1478 curlerr = CURLE_SSL_CONNECT_ERROR;
1481 char *configstring = aprintf("library=%s name=PEM", pem_library);
1483 PR_Unlock(nss_initlock);
1486 mod = SECMOD_LoadUserModule(configstring, NULL, PR_FALSE);
1489 if(!mod || !mod->loaded) {
1491 SECMOD_DestroyModule(mod);
1494 infof(data, "WARNING: failed to load NSS PEM library %s. Using "
1495 "OpenSSL PEM certificates will not work.\n", pem_library);
1499 PK11_SetPasswordFunc(nss_get_password);
1500 PR_Unlock(nss_initlock);
1502 model = PR_NewTCPSocket();
1505 model = SSL_ImportFD(NULL, model);
1507 if(SSL_OptionSet(model, SSL_SECURITY, PR_TRUE) != SECSuccess)
1509 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_SERVER, PR_FALSE) != SECSuccess)
1511 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE) != SECSuccess)
1514 /* do not use SSL cache if disabled or we are not going to verify peer */
1515 ssl_no_cache = (conn->ssl_config.sessionid && data->set.ssl.verifypeer) ?
1517 if(SSL_OptionSet(model, SSL_NO_CACHE, ssl_no_cache) != SECSuccess)
1520 /* enable/disable the requested SSL version(s) */
1521 if(nss_init_sslver(&sslver, data) != CURLE_OK)
1523 if(SSL_VersionRangeSet(model, &sslver) != SECSuccess)
1526 ssl_cbc_random_iv = !data->set.ssl_enable_beast;
1527 #ifdef SSL_CBC_RANDOM_IV
1528 /* unless the user explicitly asks to allow the protocol vulnerability, we
1529 use the work-around */
1530 if(SSL_OptionSet(model, SSL_CBC_RANDOM_IV, ssl_cbc_random_iv) != SECSuccess)
1531 infof(data, "warning: failed to set SSL_CBC_RANDOM_IV = %d\n",
1534 if(ssl_cbc_random_iv)
1535 infof(data, "warning: support for SSL_CBC_RANDOM_IV not compiled in\n");
1538 /* reset the flag to avoid an infinite loop */
1539 data->state.ssl_connect_retry = FALSE;
1541 if(data->set.ssl.cipher_list) {
1542 if(set_ciphers(data, model, data->set.ssl.cipher_list) != SECSuccess) {
1543 curlerr = CURLE_SSL_CIPHER;
1548 if(!data->set.ssl.verifypeer && data->set.ssl.verifyhost)
1549 infof(data, "warning: ignoring value of ssl.verifyhost\n");
1551 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
1553 if(SSL_AuthCertificateHook(model, nss_auth_cert_hook, conn) != SECSuccess)
1556 data->set.ssl.certverifyresult=0; /* not checked yet */
1557 if(SSL_BadCertHook(model, BadCertHandler, conn) != SECSuccess)
1560 if(SSL_HandshakeCallback(model, HandshakeCallback, conn) != SECSuccess)
1563 if(data->set.ssl.verifypeer) {
1564 const CURLcode rv = nss_load_ca_certificates(conn, sockindex);
1565 if(CURLE_OK != rv) {
1571 if(data->set.ssl.CRLfile) {
1572 const CURLcode rv = nss_load_crl(data->set.ssl.CRLfile);
1573 if(CURLE_OK != rv) {
1577 infof(data, " CRLfile: %s\n", data->set.ssl.CRLfile);
1580 if(data->set.str[STRING_CERT]) {
1581 char *nickname = dup_nickname(data, STRING_CERT);
1583 /* we are not going to use libnsspem.so to read the client cert */
1584 connssl->obj_clicert = NULL;
1587 CURLcode rv = cert_stuff(conn, sockindex, data->set.str[STRING_CERT],
1588 data->set.str[STRING_KEY]);
1589 if(CURLE_OK != rv) {
1590 /* failf() is already done in cert_stuff() */
1596 /* store the nickname for SelectClientCert() called during handshake */
1597 connssl->client_nickname = nickname;
1600 connssl->client_nickname = NULL;
1602 if(SSL_GetClientAuthDataHook(model, SelectClientCert,
1603 (void *)connssl) != SECSuccess) {
1604 curlerr = CURLE_SSL_CERTPROBLEM;
1608 /* wrap OS file descriptor by NSPR's file descriptor abstraction */
1609 nspr_io = PR_ImportTCPSocket(sockfd);
1613 /* create our own NSPR I/O layer */
1614 nspr_io_stub = PR_CreateIOLayerStub(nspr_io_identity, &nspr_io_methods);
1620 /* make the per-connection data accessible from NSPR I/O callbacks */
1621 nspr_io_stub->secret = (void *)connssl;
1623 /* push our new layer to the NSPR I/O stack */
1624 if(PR_PushIOLayer(nspr_io, PR_TOP_IO_LAYER, nspr_io_stub) != PR_SUCCESS) {
1626 PR_Close(nspr_io_stub);
1630 /* import our model socket onto the current I/O stack */
1631 connssl->handle = SSL_ImportFD(model, nspr_io);
1632 if(!connssl->handle) {
1637 PR_Close(model); /* We don't need this any more */
1640 /* This is the password associated with the cert that we're using */
1641 if(data->set.str[STRING_KEY_PASSWD]) {
1642 SSL_SetPKCS11PinArg(connssl->handle, data->set.str[STRING_KEY_PASSWD]);
1646 if(data->set.httpversion == CURL_HTTP_VERSION_2_0) {
1647 #ifdef SSL_ENABLE_NPN
1648 if(data->set.ssl_enable_npn) {
1649 if(SSL_OptionSet(connssl->handle, SSL_ENABLE_NPN, PR_TRUE) != SECSuccess)
1654 #ifdef SSL_ENABLE_ALPN
1655 if(data->set.ssl_enable_alpn) {
1656 if(SSL_OptionSet(connssl->handle, SSL_ENABLE_ALPN, PR_TRUE)
1662 #if defined(SSL_ENABLE_NPN) || defined(SSL_ENABLE_ALPN)
1663 if(data->set.ssl_enable_npn || data->set.ssl_enable_alpn) {
1664 alpn_protos[cur] = NGHTTP2_PROTO_VERSION_ID_LEN;
1666 memcpy(&alpn_protos[cur], NGHTTP2_PROTO_VERSION_ID,
1667 NGHTTP2_PROTO_VERSION_ID_LEN);
1668 cur += NGHTTP2_PROTO_VERSION_ID_LEN;
1669 alpn_protos[cur] = ALPN_HTTP_1_1_LENGTH;
1671 memcpy(&alpn_protos[cur], ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH);
1673 if(SSL_SetNextProtoNego(connssl->handle, alpn_protos, alpn_protos_len)
1678 infof(data, "SSL, can't negotiate HTTP/2.0 with neither NPN nor ALPN\n");
1685 /* Force handshake on next I/O */
1686 SSL_ResetHandshake(connssl->handle, /* asServer */ PR_FALSE);
1688 SSL_SetURL(connssl->handle, conn->host.name);
1696 return nss_fail_connect(connssl, data, curlerr);
1699 static CURLcode nss_do_connect(struct connectdata *conn, int sockindex)
1701 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1702 struct SessionHandle *data = conn->data;
1703 CURLcode curlerr = CURLE_SSL_CONNECT_ERROR;
1706 /* check timeout situation */
1707 const long time_left = Curl_timeleft(data, NULL, TRUE);
1708 if(time_left < 0L) {
1709 failf(data, "timed out before SSL handshake");
1710 curlerr = CURLE_OPERATION_TIMEDOUT;
1714 /* Force the handshake now */
1715 timeout = PR_MillisecondsToInterval((PRUint32) time_left);
1716 if(SSL_ForceHandshakeWithTimeout(connssl->handle, timeout) != SECSuccess) {
1717 if(PR_GetError() == PR_WOULD_BLOCK_ERROR)
1718 /* blocking direction is updated by nss_update_connecting_state() */
1720 else if(conn->data->set.ssl.certverifyresult == SSL_ERROR_BAD_CERT_DOMAIN)
1721 curlerr = CURLE_PEER_FAILED_VERIFICATION;
1722 else if(conn->data->set.ssl.certverifyresult!=0)
1723 curlerr = CURLE_SSL_CACERT;
1727 connssl->state = ssl_connection_complete;
1728 conn->recv[sockindex] = nss_recv;
1729 conn->send[sockindex] = nss_send;
1731 display_conn_info(conn, connssl->handle);
1733 if(data->set.str[STRING_SSL_ISSUERCERT]) {
1734 SECStatus ret = SECFailure;
1735 char *nickname = dup_nickname(data, STRING_SSL_ISSUERCERT);
1737 /* we support only nicknames in case of STRING_SSL_ISSUERCERT for now */
1738 ret = check_issuer_cert(connssl->handle, nickname);
1742 if(SECFailure == ret) {
1743 infof(data,"SSL certificate issuer check failed\n");
1744 curlerr = CURLE_SSL_ISSUER_ERROR;
1748 infof(data, "SSL certificate issuer check ok\n");
1755 return nss_fail_connect(connssl, data, curlerr);
1758 static CURLcode nss_connect_common(struct connectdata *conn, int sockindex,
1761 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1762 struct SessionHandle *data = conn->data;
1763 const bool blocking = (done == NULL);
1766 if(connssl->connecting_state == ssl_connect_1) {
1767 rv = nss_setup_connect(conn, sockindex);
1769 /* we do not expect CURLE_AGAIN from nss_setup_connect() */
1773 /* in non-blocking mode, set NSS non-blocking mode before handshake */
1774 rv = nss_set_nonblock(connssl, data);
1779 connssl->connecting_state = ssl_connect_2;
1782 rv = nss_do_connect(conn, sockindex);
1788 /* CURLE_AGAIN in non-blocking mode is not an error */
1796 /* in blocking mode, set NSS non-blocking mode _after_ SSL handshake */
1797 rv = nss_set_nonblock(connssl, data);
1802 /* signal completed SSL handshake */
1805 connssl->connecting_state = ssl_connect_done;
1809 CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex)
1811 return nss_connect_common(conn, sockindex, /* blocking */ NULL);
1814 CURLcode Curl_nss_connect_nonblocking(struct connectdata *conn,
1815 int sockindex, bool *done)
1817 return nss_connect_common(conn, sockindex, done);
1820 static ssize_t nss_send(struct connectdata *conn, /* connection data */
1821 int sockindex, /* socketindex */
1822 const void *mem, /* send this data */
1823 size_t len, /* amount to write */
1826 ssize_t rc = PR_Send(conn->ssl[sockindex].handle, mem, (int)len, 0,
1827 PR_INTERVAL_NO_WAIT);
1829 PRInt32 err = PR_GetError();
1830 if(err == PR_WOULD_BLOCK_ERROR)
1831 *curlcode = CURLE_AGAIN;
1833 /* print the error number and error string */
1834 const char *err_name = nss_error_to_name(err);
1835 infof(conn->data, "SSL write: error %d (%s)\n", err, err_name);
1837 /* print a human-readable message describing the error if available */
1838 nss_print_error_message(conn->data, err);
1840 *curlcode = (is_cc_error(err))
1841 ? CURLE_SSL_CERTPROBLEM
1846 return rc; /* number of bytes */
1849 static ssize_t nss_recv(struct connectdata * conn, /* connection data */
1850 int num, /* socketindex */
1851 char *buf, /* store read data here */
1852 size_t buffersize, /* max amount to read */
1855 ssize_t nread = PR_Recv(conn->ssl[num].handle, buf, (int)buffersize, 0,
1856 PR_INTERVAL_NO_WAIT);
1858 /* failed SSL read */
1859 PRInt32 err = PR_GetError();
1861 if(err == PR_WOULD_BLOCK_ERROR)
1862 *curlcode = CURLE_AGAIN;
1864 /* print the error number and error string */
1865 const char *err_name = nss_error_to_name(err);
1866 infof(conn->data, "SSL read: errno %d (%s)\n", err, err_name);
1868 /* print a human-readable message describing the error if available */
1869 nss_print_error_message(conn->data, err);
1871 *curlcode = (is_cc_error(err))
1872 ? CURLE_SSL_CERTPROBLEM
1880 size_t Curl_nss_version(char *buffer, size_t size)
1882 return snprintf(buffer, size, "NSS/%s", NSS_VERSION);
1885 int Curl_nss_seed(struct SessionHandle *data)
1887 /* make sure that NSS is initialized */
1888 return !!Curl_nss_force_init(data);
1891 void Curl_nss_random(struct SessionHandle *data,
1892 unsigned char *entropy,
1895 Curl_nss_seed(data); /* Initiate the seed if not already done */
1896 if(SECSuccess != PK11_GenerateRandom(entropy, curlx_uztosi(length))) {
1897 /* no way to signal a failure from here, we have to abort */
1898 failf(data, "PK11_GenerateRandom() failed, calling abort()...");
1903 void Curl_nss_md5sum(unsigned char *tmp, /* input */
1905 unsigned char *md5sum, /* output */
1908 PK11Context *MD5pw = PK11_CreateDigestContext(SEC_OID_MD5);
1909 unsigned int MD5out;
1910 PK11_DigestOp(MD5pw, tmp, curlx_uztoui(tmplen));
1911 PK11_DigestFinal(MD5pw, md5sum, &MD5out, curlx_uztoui(md5len));
1912 PK11_DestroyContext(MD5pw, PR_TRUE);
1915 #endif /* USE_NSS */