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 struct curl_llist *nss_crl_list = NULL;
81 NSSInitContext * nss_context = NULL;
83 volatile int initialized = 0;
90 #define PK11_SETATTRS(_attr, _idx, _type, _val, _len) do { \
91 CK_ATTRIBUTE *ptr = (_attr) + ((_idx)++); \
92 ptr->type = (_type); \
93 ptr->pValue = (_val); \
94 ptr->ulValueLen = (_len); \
97 #define CERT_NewTempCertificate __CERT_NewTempCertificate
99 #define NUM_OF_CIPHERS sizeof(cipherlist)/sizeof(cipherlist[0])
100 static const cipher_s cipherlist[] = {
101 /* SSL2 cipher suites */
102 {"rc4", SSL_EN_RC4_128_WITH_MD5},
103 {"rc4-md5", SSL_EN_RC4_128_WITH_MD5},
104 {"rc4export", SSL_EN_RC4_128_EXPORT40_WITH_MD5},
105 {"rc2", SSL_EN_RC2_128_CBC_WITH_MD5},
106 {"rc2export", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5},
107 {"des", SSL_EN_DES_64_CBC_WITH_MD5},
108 {"desede3", SSL_EN_DES_192_EDE3_CBC_WITH_MD5},
109 /* SSL3/TLS cipher suites */
110 {"rsa_rc4_128_md5", SSL_RSA_WITH_RC4_128_MD5},
111 {"rsa_rc4_128_sha", SSL_RSA_WITH_RC4_128_SHA},
112 {"rsa_3des_sha", SSL_RSA_WITH_3DES_EDE_CBC_SHA},
113 {"rsa_des_sha", SSL_RSA_WITH_DES_CBC_SHA},
114 {"rsa_rc4_40_md5", SSL_RSA_EXPORT_WITH_RC4_40_MD5},
115 {"rsa_rc2_40_md5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5},
116 {"rsa_null_md5", SSL_RSA_WITH_NULL_MD5},
117 {"rsa_null_sha", SSL_RSA_WITH_NULL_SHA},
118 {"fips_3des_sha", SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA},
119 {"fips_des_sha", SSL_RSA_FIPS_WITH_DES_CBC_SHA},
120 {"fortezza", SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA},
121 {"fortezza_rc4_128_sha", SSL_FORTEZZA_DMS_WITH_RC4_128_SHA},
122 {"fortezza_null", SSL_FORTEZZA_DMS_WITH_NULL_SHA},
123 /* TLS 1.0: Exportable 56-bit Cipher Suites. */
124 {"rsa_des_56_sha", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA},
125 {"rsa_rc4_56_sha", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA},
127 {"dhe_dss_aes_128_cbc_sha", TLS_DHE_DSS_WITH_AES_128_CBC_SHA},
128 {"dhe_dss_aes_256_cbc_sha", TLS_DHE_DSS_WITH_AES_256_CBC_SHA},
129 {"dhe_rsa_aes_128_cbc_sha", TLS_DHE_RSA_WITH_AES_128_CBC_SHA},
130 {"dhe_rsa_aes_256_cbc_sha", TLS_DHE_RSA_WITH_AES_256_CBC_SHA},
131 {"rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA},
132 {"rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA},
134 {"ecdh_ecdsa_null_sha", TLS_ECDH_ECDSA_WITH_NULL_SHA},
135 {"ecdh_ecdsa_rc4_128_sha", TLS_ECDH_ECDSA_WITH_RC4_128_SHA},
136 {"ecdh_ecdsa_3des_sha", TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA},
137 {"ecdh_ecdsa_aes_128_sha", TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA},
138 {"ecdh_ecdsa_aes_256_sha", TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA},
139 {"ecdhe_ecdsa_null_sha", TLS_ECDHE_ECDSA_WITH_NULL_SHA},
140 {"ecdhe_ecdsa_rc4_128_sha", TLS_ECDHE_ECDSA_WITH_RC4_128_SHA},
141 {"ecdhe_ecdsa_3des_sha", TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA},
142 {"ecdhe_ecdsa_aes_128_sha", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA},
143 {"ecdhe_ecdsa_aes_256_sha", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA},
144 {"ecdh_rsa_null_sha", TLS_ECDH_RSA_WITH_NULL_SHA},
145 {"ecdh_rsa_128_sha", TLS_ECDH_RSA_WITH_RC4_128_SHA},
146 {"ecdh_rsa_3des_sha", TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA},
147 {"ecdh_rsa_aes_128_sha", TLS_ECDH_RSA_WITH_AES_128_CBC_SHA},
148 {"ecdh_rsa_aes_256_sha", TLS_ECDH_RSA_WITH_AES_256_CBC_SHA},
149 {"echde_rsa_null", TLS_ECDHE_RSA_WITH_NULL_SHA},
150 {"ecdhe_rsa_rc4_128_sha", TLS_ECDHE_RSA_WITH_RC4_128_SHA},
151 {"ecdhe_rsa_3des_sha", TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA},
152 {"ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
153 {"ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA},
154 {"ecdh_anon_null_sha", TLS_ECDH_anon_WITH_NULL_SHA},
155 {"ecdh_anon_rc4_128sha", TLS_ECDH_anon_WITH_RC4_128_SHA},
156 {"ecdh_anon_3des_sha", TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA},
157 {"ecdh_anon_aes_128_sha", TLS_ECDH_anon_WITH_AES_128_CBC_SHA},
158 {"ecdh_anon_aes_256_sha", TLS_ECDH_anon_WITH_AES_256_CBC_SHA},
159 #ifdef TLS_RSA_WITH_NULL_SHA256
160 /* new HMAC-SHA256 cipher suites specified in RFC */
161 {"rsa_null_sha_256", TLS_RSA_WITH_NULL_SHA256},
162 {"rsa_aes_128_cbc_sha_256", TLS_RSA_WITH_AES_128_CBC_SHA256},
163 {"rsa_aes_256_cbc_sha_256", TLS_RSA_WITH_AES_256_CBC_SHA256},
164 {"dhe_rsa_aes_128_cbc_sha_256", TLS_DHE_RSA_WITH_AES_128_CBC_SHA256},
165 {"dhe_rsa_aes_256_cbc_sha_256", TLS_DHE_RSA_WITH_AES_256_CBC_SHA256},
166 {"ecdhe_ecdsa_aes_128_cbc_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256},
167 {"ecdhe_rsa_aes_128_cbc_sha_256", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256},
169 #ifdef TLS_RSA_WITH_AES_128_GCM_SHA256
170 /* AES GCM cipher suites in RFC 5288 and RFC 5289 */
171 {"rsa_aes_128_gcm_sha_256", TLS_RSA_WITH_AES_128_GCM_SHA256},
172 {"dhe_rsa_aes_128_gcm_sha_256", TLS_DHE_RSA_WITH_AES_128_GCM_SHA256},
173 {"dhe_dss_aes_128_gcm_sha_256", TLS_DHE_DSS_WITH_AES_128_GCM_SHA256},
174 {"ecdhe_ecdsa_aes_128_gcm_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
175 {"ecdh_ecdsa_aes_128_gcm_sha_256", TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256},
176 {"ecdhe_rsa_aes_128_gcm_sha_256", TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
177 {"ecdh_rsa_aes_128_gcm_sha_256", TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256},
181 static const char* pem_library = "libnsspem.so";
182 SECMODModule* mod = NULL;
184 /* NSPR I/O layer we use to detect blocking direction during SSL handshake */
185 static PRDescIdentity nspr_io_identity = PR_INVALID_IO_LAYER;
186 static PRIOMethods nspr_io_methods;
188 static const char* nss_error_to_name(PRErrorCode code)
190 const char *name = PR_ErrorToName(code);
194 return "unknown error";
197 static void nss_print_error_message(struct SessionHandle *data, PRUint32 err)
199 failf(data, "%s", PR_ErrorToString(err, PR_LANGUAGE_I_DEFAULT));
202 static SECStatus set_ciphers(struct SessionHandle *data, PRFileDesc * model,
206 PRBool cipher_state[NUM_OF_CIPHERS];
210 /* First disable all ciphers. This uses a different max value in case
211 * NSS adds more ciphers later we don't want them available by
214 for(i=0; i<SSL_NumImplementedCiphers; i++) {
215 SSL_CipherPrefSet(model, SSL_ImplementedCiphers[i], PR_FALSE);
218 /* Set every entry in our list to false */
219 for(i=0; i<NUM_OF_CIPHERS; i++) {
220 cipher_state[i] = PR_FALSE;
223 cipher = cipher_list;
225 while(cipher_list && (cipher_list[0])) {
226 while((*cipher) && (ISSPACE(*cipher)))
229 if((cipher_list = strchr(cipher, ','))) {
230 *cipher_list++ = '\0';
235 for(i=0; i<NUM_OF_CIPHERS; i++) {
236 if(Curl_raw_equal(cipher, cipherlist[i].name)) {
237 cipher_state[i] = PR_TRUE;
243 if(found == PR_FALSE) {
244 failf(data, "Unknown cipher in list: %s", cipher);
249 cipher = cipher_list;
253 /* Finally actually enable the selected ciphers */
254 for(i=0; i<NUM_OF_CIPHERS; i++) {
258 if(SSL_CipherPrefSet(model, cipherlist[i].num, PR_TRUE) != SECSuccess) {
259 failf(data, "cipher-suite not supported by NSS: %s", cipherlist[i].name);
268 * Get the number of ciphers that are enabled. We use this to determine
269 * if we need to call NSS_SetDomesticPolicy() to enable the default ciphers.
271 static int num_enabled_ciphers(void)
277 for(i=0; i<NUM_OF_CIPHERS; i++) {
278 SSL_CipherPolicyGet(cipherlist[i].num, &policy);
286 * Determine whether the nickname passed in is a filename that needs to
287 * be loaded as a PEM or a regular NSS nickname.
289 * returns 1 for a file
290 * returns 0 for not a file (NSS nickname)
292 static int is_file(const char *filename)
299 if(stat(filename, &st) == 0)
300 if(S_ISREG(st.st_mode))
306 /* Check if the given string is filename or nickname of a certificate. If the
307 * given string is recognized as filename, return NULL. If the given string is
308 * recognized as nickname, return a duplicated string. The returned string
309 * should be later deallocated using free(). If the OOM failure occurs, we
312 static char* dup_nickname(struct SessionHandle *data, enum dupstring cert_kind)
314 const char *str = data->set.str[cert_kind];
318 /* no such file exists, use the string as nickname */
321 /* search the last slash; we require at least one slash in a file name */
322 n = strrchr(str, '/');
324 infof(data, "warning: certificate file name \"%s\" handled as nickname; "
325 "please use \"./%s\" to force file name\n", str, str);
329 /* we'll use the PEM reader to read the certificate from file */
333 /* Call PK11_CreateGenericObject() with the given obj_class and filename. If
334 * the call succeeds, append the object handle to the list of objects so that
335 * the object can be destroyed in Curl_nss_close(). */
336 static CURLcode nss_create_object(struct ssl_connect_data *ssl,
337 CK_OBJECT_CLASS obj_class,
338 const char *filename, bool cacert)
341 PK11GenericObject *obj;
342 CK_BBOOL cktrue = CK_TRUE;
343 CK_BBOOL ckfalse = CK_FALSE;
344 CK_ATTRIBUTE attrs[/* max count of attributes */ 4];
346 CURLcode result = (cacert)
347 ? CURLE_SSL_CACERT_BADFILE
348 : CURLE_SSL_CERTPROBLEM;
350 const int slot_id = (cacert) ? 0 : 1;
351 char *slot_name = aprintf("PEM Token #%d", slot_id);
353 return CURLE_OUT_OF_MEMORY;
355 slot = PK11_FindSlotByName(slot_name);
360 PK11_SETATTRS(attrs, attr_cnt, CKA_CLASS, &obj_class, sizeof(obj_class));
361 PK11_SETATTRS(attrs, attr_cnt, CKA_TOKEN, &cktrue, sizeof(CK_BBOOL));
362 PK11_SETATTRS(attrs, attr_cnt, CKA_LABEL, (unsigned char *)filename,
363 strlen(filename) + 1);
365 if(CKO_CERTIFICATE == obj_class) {
366 CK_BBOOL *pval = (cacert) ? (&cktrue) : (&ckfalse);
367 PK11_SETATTRS(attrs, attr_cnt, CKA_TRUST, pval, sizeof(*pval));
370 obj = PK11_CreateGenericObject(slot, attrs, attr_cnt, PR_FALSE);
375 if(!Curl_llist_insert_next(ssl->obj_list, ssl->obj_list->tail, obj)) {
376 PK11_DestroyGenericObject(obj);
377 return CURLE_OUT_OF_MEMORY;
380 if(!cacert && CKO_CERTIFICATE == obj_class)
381 /* store reference to a client certificate */
382 ssl->obj_clicert = obj;
387 /* Destroy the NSS object whose handle is given by ptr. This function is
388 * a callback of Curl_llist_alloc() used by Curl_llist_destroy() to destroy
389 * NSS objects in Curl_nss_close() */
390 static void nss_destroy_object(void *user, void *ptr)
392 PK11GenericObject *obj = (PK11GenericObject *)ptr;
394 PK11_DestroyGenericObject(obj);
397 /* same as nss_destroy_object() but for CRL items */
398 static void nss_destroy_crl_item(void *user, void *ptr)
400 SECItem *crl_der = (SECItem *)ptr;
402 SECITEM_FreeItem(crl_der, PR_TRUE);
405 static CURLcode nss_load_cert(struct ssl_connect_data *ssl,
406 const char *filename, PRBool cacert)
408 CURLcode result = (cacert)
409 ? CURLE_SSL_CACERT_BADFILE
410 : CURLE_SSL_CERTPROBLEM;
412 /* libnsspem.so leaks memory if the requested file does not exist. For more
413 * details, go to <https://bugzilla.redhat.com/734760>. */
414 if(is_file(filename))
415 result = nss_create_object(ssl, CKO_CERTIFICATE, filename, cacert);
417 if(!result && !cacert) {
418 /* we have successfully loaded a client certificate */
419 CERTCertificate *cert;
420 char *nickname = NULL;
421 char *n = strrchr(filename, '/');
425 /* The following undocumented magic helps to avoid a SIGSEGV on call
426 * of PK11_ReadRawAttribute() from SelectClientCert() when using an
427 * immature version of libnsspem.so. For more details, go to
428 * <https://bugzilla.redhat.com/733685>. */
429 nickname = aprintf("PEM Token #1:%s", n);
431 cert = PK11_FindCertFromNickname(nickname, NULL);
433 CERT_DestroyCertificate(cert);
442 /* add given CRL to cache if it is not already there */
443 static CURLcode nss_cache_crl(SECItem *crl_der)
445 CERTCertDBHandle *db = CERT_GetDefaultCertDB();
446 CERTSignedCrl *crl = SEC_FindCrlByDERCert(db, crl_der, 0);
448 /* CRL already cached */
450 SECITEM_FreeItem(crl_der, PR_TRUE);
454 /* acquire lock before call of CERT_CacheCRL() and accessing nss_crl_list */
455 PR_Lock(nss_crllock);
457 /* store the CRL item so that we can free it in Curl_nss_cleanup() */
458 if(!Curl_llist_insert_next(nss_crl_list, nss_crl_list->tail, crl_der)) {
459 SECITEM_FreeItem(crl_der, PR_TRUE);
460 PR_Unlock(nss_crllock);
461 return CURLE_OUT_OF_MEMORY;
464 if(SECSuccess != CERT_CacheCRL(db, crl_der)) {
465 /* unable to cache CRL */
466 PR_Unlock(nss_crllock);
467 return CURLE_SSL_CRL_BADFILE;
470 /* we need to clear session cache, so that the CRL could take effect */
471 SSL_ClearSessionCache();
472 PR_Unlock(nss_crllock);
476 static CURLcode nss_load_crl(const char* crlfilename)
480 SECItem filedata = { 0, NULL, 0 };
481 SECItem *crl_der = NULL;
484 infile = PR_Open(crlfilename, PR_RDONLY, 0);
486 return CURLE_SSL_CRL_BADFILE;
488 if(PR_SUCCESS != PR_GetOpenFileInfo(infile, &info))
491 if(!SECITEM_AllocItem(NULL, &filedata, info.size + /* zero ended */ 1))
494 if(info.size != PR_Read(infile, filedata.data, info.size))
497 crl_der = SECITEM_AllocItem(NULL, NULL, 0U);
501 /* place a trailing zero right after the visible data */
502 body = (char*)filedata.data;
503 body[--filedata.len] = '\0';
505 body = strstr(body, "-----BEGIN");
509 char *begin = PORT_Strchr(body, '\n');
511 begin = PORT_Strchr(body, '\r');
515 trailer = strstr(++begin, "-----END");
519 /* retrieve DER from ASCII */
521 if(ATOB_ConvertAsciiToItem(crl_der, begin))
524 SECITEM_FreeItem(&filedata, PR_FALSE);
531 return nss_cache_crl(crl_der);
535 SECITEM_FreeItem(crl_der, PR_TRUE);
536 SECITEM_FreeItem(&filedata, PR_FALSE);
537 return CURLE_SSL_CRL_BADFILE;
540 static CURLcode nss_load_key(struct connectdata *conn, int sockindex,
546 struct ssl_connect_data *ssl = conn->ssl;
548 (void)sockindex; /* unused */
550 result = nss_create_object(ssl, CKO_PRIVATE_KEY, key_file, FALSE);
552 PR_SetError(SEC_ERROR_BAD_KEY, 0);
556 slot = PK11_FindSlotByName("PEM Token #1");
558 return CURLE_SSL_CERTPROBLEM;
560 /* This will force the token to be seen as re-inserted */
561 SECMOD_WaitForAnyTokenEvent(mod, 0, 0);
562 PK11_IsPresent(slot);
564 status = PK11_Authenticate(slot, PR_TRUE,
565 conn->data->set.str[STRING_KEY_PASSWD]);
568 return (SECSuccess == status) ? CURLE_OK : CURLE_SSL_CERTPROBLEM;
571 static int display_error(struct connectdata *conn, PRInt32 err,
572 const char *filename)
575 case SEC_ERROR_BAD_PASSWORD:
576 failf(conn->data, "Unable to load client key: Incorrect password");
578 case SEC_ERROR_UNKNOWN_CERT:
579 failf(conn->data, "Unable to load certificate %s", filename);
584 return 0; /* The caller will print a generic error */
587 static CURLcode cert_stuff(struct connectdata *conn, int sockindex,
588 char *cert_file, char *key_file)
590 struct SessionHandle *data = conn->data;
594 result = nss_load_cert(&conn->ssl[sockindex], cert_file, PR_FALSE);
596 const PRErrorCode err = PR_GetError();
597 if(!display_error(conn, err, cert_file)) {
598 const char *err_name = nss_error_to_name(err);
599 failf(data, "unable to load client cert: %d (%s)", err, err_name);
606 if(key_file || (is_file(cert_file))) {
608 result = nss_load_key(conn, sockindex, key_file);
610 /* In case the cert file also has the key */
611 result = nss_load_key(conn, sockindex, cert_file);
613 const PRErrorCode err = PR_GetError();
614 if(!display_error(conn, err, key_file)) {
615 const char *err_name = nss_error_to_name(err);
616 failf(data, "unable to load client key: %d (%s)", err, err_name);
626 static char * nss_get_password(PK11SlotInfo * slot, PRBool retry, void *arg)
628 (void)slot; /* unused */
630 if(retry || NULL == arg)
633 return (char *)PORT_Strdup((char *)arg);
636 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
638 static SECStatus nss_auth_cert_hook(void *arg, PRFileDesc *fd, PRBool checksig,
641 struct connectdata *conn = (struct connectdata *)arg;
642 if(!conn->data->set.ssl.verifypeer) {
643 infof(conn->data, "skipping SSL peer certificate verification\n");
647 return SSL_AuthCertificate(CERT_GetDefaultCertDB(), fd, checksig, isServer);
651 * Inform the application that the handshake is complete.
653 static void HandshakeCallback(PRFileDesc *sock, void *arg)
656 struct connectdata *conn = (struct connectdata*) arg;
657 unsigned int buflenmax = 50;
658 unsigned char buf[50];
660 SSLNextProtoState state;
662 if(!conn->data->set.ssl_enable_npn && !conn->data->set.ssl_enable_alpn) {
666 if(SSL_GetNextProto(sock, &state, buf, &buflen, buflenmax) == SECSuccess) {
669 case SSL_NEXT_PROTO_NO_SUPPORT:
670 case SSL_NEXT_PROTO_NO_OVERLAP:
671 if(connssl->asked_for_h2)
672 infof(conn->data, "TLS, neither ALPN nor NPN succeeded\n");
674 #ifdef SSL_ENABLE_ALPN
675 case SSL_NEXT_PROTO_SELECTED:
676 infof(conn->data, "ALPN, server accepted to use %.*s\n", buflen, buf);
679 case SSL_NEXT_PROTO_NEGOTIATED:
680 infof(conn->data, "NPN, server accepted to use %.*s\n", buflen, buf);
684 if(buflen == NGHTTP2_PROTO_VERSION_ID_LEN &&
685 memcmp(NGHTTP2_PROTO_VERSION_ID, buf, NGHTTP2_PROTO_VERSION_ID_LEN)
687 conn->negnpn = NPN_HTTP2;
689 else if(buflen == ALPN_HTTP_1_1_LENGTH && memcmp(ALPN_HTTP_1_1, buf,
690 ALPN_HTTP_1_1_LENGTH)) {
691 conn->negnpn = NPN_HTTP1_1;
700 static void display_cert_info(struct SessionHandle *data,
701 CERTCertificate *cert)
703 char *subject, *issuer, *common_name;
704 PRExplodedTime printableTime;
705 char timeString[256];
706 PRTime notBefore, notAfter;
708 subject = CERT_NameToAscii(&cert->subject);
709 issuer = CERT_NameToAscii(&cert->issuer);
710 common_name = CERT_GetCommonName(&cert->subject);
711 infof(data, "\tsubject: %s\n", subject);
713 CERT_GetCertTimes(cert, ¬Before, ¬After);
714 PR_ExplodeTime(notBefore, PR_GMTParameters, &printableTime);
715 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
716 infof(data, "\tstart date: %s\n", timeString);
717 PR_ExplodeTime(notAfter, PR_GMTParameters, &printableTime);
718 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
719 infof(data, "\texpire date: %s\n", timeString);
720 infof(data, "\tcommon name: %s\n", common_name);
721 infof(data, "\tissuer: %s\n", issuer);
725 PR_Free(common_name);
728 static CURLcode display_conn_info(struct connectdata *conn, PRFileDesc *sock)
730 CURLcode result = CURLE_OK;
731 SSLChannelInfo channel;
732 SSLCipherSuiteInfo suite;
733 CERTCertificate *cert;
734 CERTCertificate *cert2;
735 CERTCertificate *cert3;
739 if(SSL_GetChannelInfo(sock, &channel, sizeof channel) ==
740 SECSuccess && channel.length == sizeof channel &&
741 channel.cipherSuite) {
742 if(SSL_GetCipherSuiteInfo(channel.cipherSuite,
743 &suite, sizeof suite) == SECSuccess) {
744 infof(conn->data, "SSL connection using %s\n", suite.cipherSuiteName);
748 cert = SSL_PeerCertificate(sock);
750 infof(conn->data, "Server certificate:\n");
752 if(!conn->data->set.ssl.certinfo) {
753 display_cert_info(conn->data, cert);
754 CERT_DestroyCertificate(cert);
757 /* Count certificates in chain. */
761 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
765 CERT_DestroyCertificate(cert2);
768 cert3 = CERT_FindCertIssuer(cert2, now, certUsageSSLCA);
769 CERT_DestroyCertificate(cert2);
774 result = Curl_ssl_init_certinfo(conn->data, i);
776 for(i = 0; cert; cert = cert2) {
777 result = Curl_extract_certinfo(conn, i++, (char *)cert->derCert.data,
778 (char *)cert->derCert.data +
784 CERT_DestroyCertificate(cert);
788 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
789 CERT_DestroyCertificate(cert);
798 static SECStatus BadCertHandler(void *arg, PRFileDesc *sock)
800 struct connectdata *conn = (struct connectdata *)arg;
801 struct SessionHandle *data = conn->data;
802 PRErrorCode err = PR_GetError();
803 CERTCertificate *cert;
805 /* remember the cert verification result */
806 data->set.ssl.certverifyresult = err;
808 if(err == SSL_ERROR_BAD_CERT_DOMAIN && !data->set.ssl.verifyhost)
809 /* we are asked not to verify the host name */
812 /* print only info about the cert, the error is printed off the callback */
813 cert = SSL_PeerCertificate(sock);
815 infof(data, "Server certificate:\n");
816 display_cert_info(data, cert);
817 CERT_DestroyCertificate(cert);
825 * Check that the Peer certificate's issuer certificate matches the one found
826 * by issuer_nickname. This is not exactly the way OpenSSL and GNU TLS do the
827 * issuer check, so we provide comments that mimic the OpenSSL
828 * X509_check_issued function (in x509v3/v3_purp.c)
830 static SECStatus check_issuer_cert(PRFileDesc *sock,
831 char *issuer_nickname)
833 CERTCertificate *cert,*cert_issuer,*issuer;
834 SECStatus res=SECSuccess;
835 void *proto_win = NULL;
838 PRArenaPool *tmpArena = NULL;
839 CERTAuthKeyID *authorityKeyID = NULL;
840 SECITEM *caname = NULL;
843 cert = SSL_PeerCertificate(sock);
844 cert_issuer = CERT_FindCertIssuer(cert,PR_Now(),certUsageObjectSigner);
846 proto_win = SSL_RevealPinArg(sock);
847 issuer = PK11_FindCertFromNickname(issuer_nickname, proto_win);
849 if((!cert_issuer) || (!issuer))
851 else if(SECITEM_CompareItem(&cert_issuer->derCert,
852 &issuer->derCert)!=SECEqual)
855 CERT_DestroyCertificate(cert);
856 CERT_DestroyCertificate(issuer);
857 CERT_DestroyCertificate(cert_issuer);
863 * Callback to pick the SSL client certificate.
865 static SECStatus SelectClientCert(void *arg, PRFileDesc *sock,
866 struct CERTDistNamesStr *caNames,
867 struct CERTCertificateStr **pRetCert,
868 struct SECKEYPrivateKeyStr **pRetKey)
870 struct ssl_connect_data *connssl = (struct ssl_connect_data *)arg;
871 struct SessionHandle *data = connssl->data;
872 const char *nickname = connssl->client_nickname;
874 if(connssl->obj_clicert) {
875 /* use the cert/key provided by PEM reader */
876 static const char pem_slotname[] = "PEM Token #1";
877 SECItem cert_der = { 0, NULL, 0 };
878 void *proto_win = SSL_RevealPinArg(sock);
879 struct CERTCertificateStr *cert;
880 struct SECKEYPrivateKeyStr *key;
882 PK11SlotInfo *slot = PK11_FindSlotByName(pem_slotname);
884 failf(data, "NSS: PK11 slot not found: %s", pem_slotname);
888 if(PK11_ReadRawAttribute(PK11_TypeGeneric, connssl->obj_clicert, CKA_VALUE,
889 &cert_der) != SECSuccess) {
890 failf(data, "NSS: CKA_VALUE not found in PK11 generic object");
895 cert = PK11_FindCertFromDERCertItem(slot, &cert_der, proto_win);
896 SECITEM_FreeItem(&cert_der, PR_FALSE);
898 failf(data, "NSS: client certificate from file not found");
903 key = PK11_FindPrivateKeyFromCert(slot, cert, NULL);
906 failf(data, "NSS: private key from file not found");
907 CERT_DestroyCertificate(cert);
911 infof(data, "NSS: client certificate from file\n");
912 display_cert_info(data, cert);
919 /* use the default NSS hook */
920 if(SECSuccess != NSS_GetClientAuthData((void *)nickname, sock, caNames,
922 || NULL == *pRetCert) {
925 failf(data, "NSS: client certificate not found (nickname not "
928 failf(data, "NSS: client certificate not found: %s", nickname);
933 /* get certificate nickname if any */
934 nickname = (*pRetCert)->nickname;
936 nickname = "[unknown]";
938 if(NULL == *pRetKey) {
939 failf(data, "NSS: private key not found for certificate: %s", nickname);
943 infof(data, "NSS: using client certificate: %s\n", nickname);
944 display_cert_info(data, *pRetCert);
948 /* update blocking direction in case of PR_WOULD_BLOCK_ERROR */
949 static void nss_update_connecting_state(ssl_connect_state state, void *secret)
951 struct ssl_connect_data *connssl = (struct ssl_connect_data *)secret;
952 if(PR_GetError() != PR_WOULD_BLOCK_ERROR)
953 /* an unrelated error is passing by */
956 switch(connssl->connecting_state) {
958 case ssl_connect_2_reading:
959 case ssl_connect_2_writing:
962 /* we are not called from an SSL handshake */
966 /* update the state accordingly */
967 connssl->connecting_state = state;
970 /* recv() wrapper we use to detect blocking direction during SSL handshake */
971 static PRInt32 nspr_io_recv(PRFileDesc *fd, void *buf, PRInt32 amount,
972 PRIntn flags, PRIntervalTime timeout)
974 const PRRecvFN recv_fn = fd->lower->methods->recv;
975 const PRInt32 rv = recv_fn(fd->lower, buf, amount, flags, timeout);
977 /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */
978 nss_update_connecting_state(ssl_connect_2_reading, fd->secret);
982 /* send() wrapper we use to detect blocking direction during SSL handshake */
983 static PRInt32 nspr_io_send(PRFileDesc *fd, const void *buf, PRInt32 amount,
984 PRIntn flags, PRIntervalTime timeout)
986 const PRSendFN send_fn = fd->lower->methods->send;
987 const PRInt32 rv = send_fn(fd->lower, buf, amount, flags, timeout);
989 /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */
990 nss_update_connecting_state(ssl_connect_2_writing, fd->secret);
994 /* close() wrapper to avoid assertion failure due to fd->secret != NULL */
995 static PRStatus nspr_io_close(PRFileDesc *fd)
997 const PRCloseFN close_fn = PR_GetDefaultIOMethods()->close;
1002 static CURLcode nss_init_core(struct SessionHandle *data, const char *cert_dir)
1004 NSSInitParameters initparams;
1006 if(nss_context != NULL)
1009 memset((void *) &initparams, '\0', sizeof(initparams));
1010 initparams.length = sizeof(initparams);
1013 char *certpath = aprintf("sql:%s", cert_dir);
1015 return CURLE_OUT_OF_MEMORY;
1017 infof(data, "Initializing NSS with certpath: %s\n", certpath);
1018 nss_context = NSS_InitContext(certpath, "", "", "", &initparams,
1019 NSS_INIT_READONLY | NSS_INIT_PK11RELOAD);
1022 if(nss_context != NULL)
1025 infof(data, "Unable to initialize NSS database\n");
1028 infof(data, "Initializing NSS with certpath: none\n");
1029 nss_context = NSS_InitContext("", "", "", "", &initparams, NSS_INIT_READONLY
1030 | NSS_INIT_NOCERTDB | NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN
1031 | NSS_INIT_NOROOTINIT | NSS_INIT_OPTIMIZESPACE | NSS_INIT_PK11RELOAD);
1032 if(nss_context != NULL)
1035 infof(data, "Unable to initialize NSS\n");
1036 return CURLE_SSL_CACERT_BADFILE;
1039 static CURLcode nss_init(struct SessionHandle *data)
1048 /* list of all CRL items we need to destroy in Curl_nss_cleanup() */
1049 nss_crl_list = Curl_llist_alloc(nss_destroy_crl_item);
1051 return CURLE_OUT_OF_MEMORY;
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 result = nss_init_core(data, cert_dir);
1089 if(num_enabled_ciphers() == 0)
1090 NSS_SetDomesticPolicy();
1100 * @retval 0 error initializing SSL
1101 * @retval 1 SSL initialized successfully
1103 int Curl_nss_init(void)
1105 /* curl_global_init() is not thread-safe so this test is ok */
1106 if(nss_initlock == NULL) {
1107 PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256);
1108 nss_initlock = PR_NewLock();
1109 nss_crllock = PR_NewLock();
1112 /* We will actually initialize NSS later */
1117 CURLcode Curl_nss_force_init(struct SessionHandle *data)
1121 failf(data, "unable to initialize NSS, curl_global_init() should have "
1122 "been called with CURL_GLOBAL_SSL or CURL_GLOBAL_ALL");
1123 return CURLE_FAILED_INIT;
1126 PR_Lock(nss_initlock);
1127 result = nss_init(data);
1128 PR_Unlock(nss_initlock);
1133 /* Global cleanup */
1134 void Curl_nss_cleanup(void)
1136 /* This function isn't required to be threadsafe and this is only done
1137 * as a safety feature.
1139 PR_Lock(nss_initlock);
1141 /* Free references to client certificates held in the SSL session cache.
1142 * Omitting this hampers destruction of the security module owning
1143 * the certificates. */
1144 SSL_ClearSessionCache();
1146 if(mod && SECSuccess == SECMOD_UnloadUserModule(mod)) {
1147 SECMOD_DestroyModule(mod);
1150 NSS_ShutdownContext(nss_context);
1154 /* destroy all CRL items */
1155 Curl_llist_destroy(nss_crl_list, NULL);
1156 nss_crl_list = NULL;
1158 PR_Unlock(nss_initlock);
1160 PR_DestroyLock(nss_initlock);
1161 PR_DestroyLock(nss_crllock);
1162 nss_initlock = NULL;
1168 * This function uses SSL_peek to determine connection status.
1171 * 1 means the connection is still in place
1172 * 0 means the connection has been closed
1173 * -1 means the connection status is unknown
1176 Curl_nss_check_cxn(struct connectdata *conn)
1182 PR_Recv(conn->ssl[FIRSTSOCKET].handle, (void *)&buf, 1, PR_MSG_PEEK,
1183 PR_SecondsToInterval(1));
1185 return 1; /* connection still in place */
1188 return 0; /* connection has been closed */
1190 return -1; /* connection status unknown */
1194 * This function is called when an SSL connection is closed.
1196 void Curl_nss_close(struct connectdata *conn, int sockindex)
1198 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1200 if(connssl->handle) {
1201 /* NSS closes the socket we previously handed to it, so we must mark it
1202 as closed to avoid double close */
1203 fake_sclose(conn->sock[sockindex]);
1204 conn->sock[sockindex] = CURL_SOCKET_BAD;
1206 if((connssl->client_nickname != NULL) || (connssl->obj_clicert != NULL))
1207 /* A server might require different authentication based on the
1208 * particular path being requested by the client. To support this
1209 * scenario, we must ensure that a connection will never reuse the
1210 * authentication data from a previous connection. */
1211 SSL_InvalidateSession(connssl->handle);
1213 if(connssl->client_nickname != NULL) {
1214 free(connssl->client_nickname);
1215 connssl->client_nickname = NULL;
1217 /* destroy all NSS objects in order to avoid failure of NSS shutdown */
1218 Curl_llist_destroy(connssl->obj_list, NULL);
1219 connssl->obj_list = NULL;
1220 connssl->obj_clicert = NULL;
1222 PR_Close(connssl->handle);
1223 connssl->handle = NULL;
1228 * This function is called when the 'data' struct is going away. Close
1229 * down everything and free all resources!
1231 void Curl_nss_close_all(struct SessionHandle *data)
1236 /* return true if NSS can provide error code (and possibly msg) for the
1238 static bool is_nss_error(CURLcode err)
1241 case CURLE_PEER_FAILED_VERIFICATION:
1242 case CURLE_SSL_CACERT:
1243 case CURLE_SSL_CERTPROBLEM:
1244 case CURLE_SSL_CONNECT_ERROR:
1245 case CURLE_SSL_ISSUER_ERROR:
1253 /* return true if the given error code is related to a client certificate */
1254 static bool is_cc_error(PRInt32 err)
1257 case SSL_ERROR_BAD_CERT_ALERT:
1258 case SSL_ERROR_EXPIRED_CERT_ALERT:
1259 case SSL_ERROR_REVOKED_CERT_ALERT:
1267 static Curl_recv nss_recv;
1268 static Curl_send nss_send;
1270 static CURLcode nss_load_ca_certificates(struct connectdata *conn,
1273 struct SessionHandle *data = conn->data;
1274 const char *cafile = data->set.ssl.CAfile;
1275 const char *capath = data->set.ssl.CApath;
1278 CURLcode result = nss_load_cert(&conn->ssl[sockindex], cafile, PR_TRUE);
1285 if(stat(capath, &st) == -1)
1286 return CURLE_SSL_CACERT_BADFILE;
1288 if(S_ISDIR(st.st_mode)) {
1290 PRDir *dir = PR_OpenDir(capath);
1292 return CURLE_SSL_CACERT_BADFILE;
1294 while((entry = PR_ReadDir(dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN))) {
1295 char *fullpath = aprintf("%s/%s", capath, entry->name);
1298 return CURLE_OUT_OF_MEMORY;
1301 if(CURLE_OK != nss_load_cert(&conn->ssl[sockindex], fullpath, PR_TRUE))
1302 /* This is purposefully tolerant of errors so non-PEM files can
1303 * be in the same directory */
1304 infof(data, "failed to load '%s' from CURLOPT_CAPATH\n", fullpath);
1312 infof(data, "warning: CURLOPT_CAPATH not a directory (%s)\n", capath);
1315 infof(data, " CAfile: %s\n CApath: %s\n",
1316 cafile ? cafile : "none",
1317 capath ? capath : "none");
1322 static CURLcode nss_init_sslver(SSLVersionRange *sslver,
1323 struct SessionHandle *data)
1325 switch(data->set.ssl.version) {
1327 case CURL_SSLVERSION_DEFAULT:
1328 case CURL_SSLVERSION_TLSv1:
1329 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1330 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1331 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1332 #elif defined SSL_LIBRARY_VERSION_TLS_1_1
1333 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1335 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1339 case CURL_SSLVERSION_SSLv2:
1340 sslver->min = SSL_LIBRARY_VERSION_2;
1341 sslver->max = SSL_LIBRARY_VERSION_2;
1344 case CURL_SSLVERSION_SSLv3:
1345 sslver->min = SSL_LIBRARY_VERSION_3_0;
1346 sslver->max = SSL_LIBRARY_VERSION_3_0;
1349 case CURL_SSLVERSION_TLSv1_0:
1350 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1351 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1354 case CURL_SSLVERSION_TLSv1_1:
1355 #ifdef SSL_LIBRARY_VERSION_TLS_1_1
1356 sslver->min = SSL_LIBRARY_VERSION_TLS_1_1;
1357 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1362 case CURL_SSLVERSION_TLSv1_2:
1363 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1364 sslver->min = SSL_LIBRARY_VERSION_TLS_1_2;
1365 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1371 failf(data, "TLS minor version cannot be set");
1372 return CURLE_SSL_CONNECT_ERROR;
1375 static CURLcode nss_fail_connect(struct ssl_connect_data *connssl,
1376 struct SessionHandle *data,
1379 PRErrorCode err = 0;
1381 if(is_nss_error(curlerr)) {
1382 /* read NSPR error code */
1383 err = PR_GetError();
1384 if(is_cc_error(err))
1385 curlerr = CURLE_SSL_CERTPROBLEM;
1387 /* print the error number and error string */
1388 infof(data, "NSS error %d (%s)\n", err, nss_error_to_name(err));
1390 /* print a human-readable message describing the error if available */
1391 nss_print_error_message(data, err);
1394 /* cleanup on connection failure */
1395 Curl_llist_destroy(connssl->obj_list, NULL);
1396 connssl->obj_list = NULL;
1401 /* Switch the SSL socket into non-blocking mode. */
1402 static CURLcode nss_set_nonblock(struct ssl_connect_data *connssl,
1403 struct SessionHandle *data)
1405 static PRSocketOptionData sock_opt;
1406 sock_opt.option = PR_SockOpt_Nonblocking;
1407 sock_opt.value.non_blocking = PR_TRUE;
1409 if(PR_SetSocketOption(connssl->handle, &sock_opt) != PR_SUCCESS)
1410 return nss_fail_connect(connssl, data, CURLE_SSL_CONNECT_ERROR);
1415 static CURLcode nss_setup_connect(struct connectdata *conn, int sockindex)
1417 PRFileDesc *model = NULL;
1418 PRFileDesc *nspr_io = NULL;
1419 PRFileDesc *nspr_io_stub = NULL;
1420 PRBool ssl_no_cache;
1421 PRBool ssl_cbc_random_iv;
1422 struct SessionHandle *data = conn->data;
1423 curl_socket_t sockfd = conn->sock[sockindex];
1424 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1427 SSLVersionRange sslver = {
1428 SSL_LIBRARY_VERSION_TLS_1_0, /* min */
1429 SSL_LIBRARY_VERSION_TLS_1_0 /* max */
1433 #if defined(SSL_ENABLE_NPN) || defined(SSL_ENABLE_ALPN)
1434 unsigned int alpn_protos_len = NGHTTP2_PROTO_VERSION_ID_LEN +
1435 ALPN_HTTP_1_1_LENGTH + 2;
1436 unsigned char alpn_protos[NGHTTP2_PROTO_VERSION_ID_LEN + ALPN_HTTP_1_1_LENGTH
1442 connssl->data = data;
1444 /* list of all NSS objects we need to destroy in Curl_nss_close() */
1445 connssl->obj_list = Curl_llist_alloc(nss_destroy_object);
1446 if(!connssl->obj_list)
1447 return CURLE_OUT_OF_MEMORY;
1449 /* FIXME. NSS doesn't support multiple databases open at the same time. */
1450 PR_Lock(nss_initlock);
1451 result = nss_init(conn->data);
1453 PR_Unlock(nss_initlock);
1457 result = CURLE_SSL_CONNECT_ERROR;
1460 char *configstring = aprintf("library=%s name=PEM", pem_library);
1462 PR_Unlock(nss_initlock);
1465 mod = SECMOD_LoadUserModule(configstring, NULL, PR_FALSE);
1468 if(!mod || !mod->loaded) {
1470 SECMOD_DestroyModule(mod);
1473 infof(data, "WARNING: failed to load NSS PEM library %s. Using "
1474 "OpenSSL PEM certificates will not work.\n", pem_library);
1478 PK11_SetPasswordFunc(nss_get_password);
1479 PR_Unlock(nss_initlock);
1481 model = PR_NewTCPSocket();
1484 model = SSL_ImportFD(NULL, model);
1486 if(SSL_OptionSet(model, SSL_SECURITY, PR_TRUE) != SECSuccess)
1488 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_SERVER, PR_FALSE) != SECSuccess)
1490 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE) != SECSuccess)
1493 /* do not use SSL cache if disabled or we are not going to verify peer */
1494 ssl_no_cache = (conn->ssl_config.sessionid && data->set.ssl.verifypeer) ?
1496 if(SSL_OptionSet(model, SSL_NO_CACHE, ssl_no_cache) != SECSuccess)
1499 /* enable/disable the requested SSL version(s) */
1500 if(nss_init_sslver(&sslver, data) != CURLE_OK)
1502 if(SSL_VersionRangeSet(model, &sslver) != SECSuccess)
1505 ssl_cbc_random_iv = !data->set.ssl_enable_beast;
1506 #ifdef SSL_CBC_RANDOM_IV
1507 /* unless the user explicitly asks to allow the protocol vulnerability, we
1508 use the work-around */
1509 if(SSL_OptionSet(model, SSL_CBC_RANDOM_IV, ssl_cbc_random_iv) != SECSuccess)
1510 infof(data, "warning: failed to set SSL_CBC_RANDOM_IV = %d\n",
1513 if(ssl_cbc_random_iv)
1514 infof(data, "warning: support for SSL_CBC_RANDOM_IV not compiled in\n");
1517 if(data->set.ssl.cipher_list) {
1518 if(set_ciphers(data, model, data->set.ssl.cipher_list) != SECSuccess) {
1519 result = CURLE_SSL_CIPHER;
1524 if(!data->set.ssl.verifypeer && data->set.ssl.verifyhost)
1525 infof(data, "warning: ignoring value of ssl.verifyhost\n");
1527 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
1529 if(SSL_AuthCertificateHook(model, nss_auth_cert_hook, conn) != SECSuccess)
1532 data->set.ssl.certverifyresult=0; /* not checked yet */
1533 if(SSL_BadCertHook(model, BadCertHandler, conn) != SECSuccess)
1536 if(SSL_HandshakeCallback(model, HandshakeCallback, conn) != SECSuccess)
1539 if(data->set.ssl.verifypeer) {
1540 const CURLcode rv = nss_load_ca_certificates(conn, sockindex);
1547 if(data->set.ssl.CRLfile) {
1548 const CURLcode rv = nss_load_crl(data->set.ssl.CRLfile);
1553 infof(data, " CRLfile: %s\n", data->set.ssl.CRLfile);
1556 if(data->set.str[STRING_CERT]) {
1557 char *nickname = dup_nickname(data, STRING_CERT);
1559 /* we are not going to use libnsspem.so to read the client cert */
1560 connssl->obj_clicert = NULL;
1563 CURLcode rv = cert_stuff(conn, sockindex, data->set.str[STRING_CERT],
1564 data->set.str[STRING_KEY]);
1566 /* failf() is already done in cert_stuff() */
1572 /* store the nickname for SelectClientCert() called during handshake */
1573 connssl->client_nickname = nickname;
1576 connssl->client_nickname = NULL;
1578 if(SSL_GetClientAuthDataHook(model, SelectClientCert,
1579 (void *)connssl) != SECSuccess) {
1580 result = CURLE_SSL_CERTPROBLEM;
1584 /* wrap OS file descriptor by NSPR's file descriptor abstraction */
1585 nspr_io = PR_ImportTCPSocket(sockfd);
1589 /* create our own NSPR I/O layer */
1590 nspr_io_stub = PR_CreateIOLayerStub(nspr_io_identity, &nspr_io_methods);
1596 /* make the per-connection data accessible from NSPR I/O callbacks */
1597 nspr_io_stub->secret = (void *)connssl;
1599 /* push our new layer to the NSPR I/O stack */
1600 if(PR_PushIOLayer(nspr_io, PR_TOP_IO_LAYER, nspr_io_stub) != PR_SUCCESS) {
1602 PR_Close(nspr_io_stub);
1606 /* import our model socket onto the current I/O stack */
1607 connssl->handle = SSL_ImportFD(model, nspr_io);
1608 if(!connssl->handle) {
1613 PR_Close(model); /* We don't need this any more */
1616 /* This is the password associated with the cert that we're using */
1617 if(data->set.str[STRING_KEY_PASSWD]) {
1618 SSL_SetPKCS11PinArg(connssl->handle, data->set.str[STRING_KEY_PASSWD]);
1622 if(data->set.httpversion == CURL_HTTP_VERSION_2_0) {
1623 #ifdef SSL_ENABLE_NPN
1624 if(data->set.ssl_enable_npn) {
1625 if(SSL_OptionSet(connssl->handle, SSL_ENABLE_NPN, PR_TRUE) != SECSuccess)
1630 #ifdef SSL_ENABLE_ALPN
1631 if(data->set.ssl_enable_alpn) {
1632 if(SSL_OptionSet(connssl->handle, SSL_ENABLE_ALPN, PR_TRUE)
1638 #if defined(SSL_ENABLE_NPN) || defined(SSL_ENABLE_ALPN)
1639 if(data->set.ssl_enable_npn || data->set.ssl_enable_alpn) {
1640 alpn_protos[cur] = NGHTTP2_PROTO_VERSION_ID_LEN;
1642 memcpy(&alpn_protos[cur], NGHTTP2_PROTO_VERSION_ID,
1643 NGHTTP2_PROTO_VERSION_ID_LEN);
1644 cur += NGHTTP2_PROTO_VERSION_ID_LEN;
1645 alpn_protos[cur] = ALPN_HTTP_1_1_LENGTH;
1647 memcpy(&alpn_protos[cur], ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH);
1649 if(SSL_SetNextProtoNego(connssl->handle, alpn_protos, alpn_protos_len)
1652 connssl->asked_for_h2 = TRUE;
1655 infof(data, "SSL, can't negotiate HTTP/2.0 with neither NPN nor ALPN\n");
1662 /* Force handshake on next I/O */
1663 SSL_ResetHandshake(connssl->handle, /* asServer */ PR_FALSE);
1665 SSL_SetURL(connssl->handle, conn->host.name);
1673 return nss_fail_connect(connssl, data, result);
1676 static CURLcode nss_do_connect(struct connectdata *conn, int sockindex)
1678 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1679 struct SessionHandle *data = conn->data;
1680 CURLcode result = CURLE_SSL_CONNECT_ERROR;
1683 /* check timeout situation */
1684 const long time_left = Curl_timeleft(data, NULL, TRUE);
1685 if(time_left < 0L) {
1686 failf(data, "timed out before SSL handshake");
1687 result = CURLE_OPERATION_TIMEDOUT;
1691 /* Force the handshake now */
1692 timeout = PR_MillisecondsToInterval((PRUint32) time_left);
1693 if(SSL_ForceHandshakeWithTimeout(connssl->handle, timeout) != SECSuccess) {
1694 if(PR_GetError() == PR_WOULD_BLOCK_ERROR)
1695 /* blocking direction is updated by nss_update_connecting_state() */
1697 else if(conn->data->set.ssl.certverifyresult == SSL_ERROR_BAD_CERT_DOMAIN)
1698 result = CURLE_PEER_FAILED_VERIFICATION;
1699 else if(conn->data->set.ssl.certverifyresult!=0)
1700 result = CURLE_SSL_CACERT;
1704 result = display_conn_info(conn, connssl->handle);
1708 if(data->set.str[STRING_SSL_ISSUERCERT]) {
1709 SECStatus ret = SECFailure;
1710 char *nickname = dup_nickname(data, STRING_SSL_ISSUERCERT);
1712 /* we support only nicknames in case of STRING_SSL_ISSUERCERT for now */
1713 ret = check_issuer_cert(connssl->handle, nickname);
1717 if(SECFailure == ret) {
1718 infof(data,"SSL certificate issuer check failed\n");
1719 result = CURLE_SSL_ISSUER_ERROR;
1723 infof(data, "SSL certificate issuer check ok\n");
1730 return nss_fail_connect(connssl, data, result);
1733 static CURLcode nss_connect_common(struct connectdata *conn, int sockindex,
1736 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1737 struct SessionHandle *data = conn->data;
1738 const bool blocking = (done == NULL);
1741 if(connssl->state == ssl_connection_complete)
1744 if(connssl->connecting_state == ssl_connect_1) {
1745 result = nss_setup_connect(conn, sockindex);
1747 /* we do not expect CURLE_AGAIN from nss_setup_connect() */
1751 /* in non-blocking mode, set NSS non-blocking mode before handshake */
1752 result = nss_set_nonblock(connssl, data);
1757 connssl->connecting_state = ssl_connect_2;
1760 result = nss_do_connect(conn, sockindex);
1766 /* CURLE_AGAIN in non-blocking mode is not an error */
1774 /* in blocking mode, set NSS non-blocking mode _after_ SSL handshake */
1775 result = nss_set_nonblock(connssl, data);
1780 /* signal completed SSL handshake */
1783 connssl->state = ssl_connection_complete;
1784 conn->recv[sockindex] = nss_recv;
1785 conn->send[sockindex] = nss_send;
1787 /* ssl_connect_done is never used outside, go back to the initial state */
1788 connssl->connecting_state = ssl_connect_1;
1793 CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex)
1795 return nss_connect_common(conn, sockindex, /* blocking */ NULL);
1798 CURLcode Curl_nss_connect_nonblocking(struct connectdata *conn,
1799 int sockindex, bool *done)
1801 return nss_connect_common(conn, sockindex, done);
1804 static ssize_t nss_send(struct connectdata *conn, /* connection data */
1805 int sockindex, /* socketindex */
1806 const void *mem, /* send this data */
1807 size_t len, /* amount to write */
1810 ssize_t rc = PR_Send(conn->ssl[sockindex].handle, mem, (int)len, 0,
1811 PR_INTERVAL_NO_WAIT);
1813 PRInt32 err = PR_GetError();
1814 if(err == PR_WOULD_BLOCK_ERROR)
1815 *curlcode = CURLE_AGAIN;
1817 /* print the error number and error string */
1818 const char *err_name = nss_error_to_name(err);
1819 infof(conn->data, "SSL write: error %d (%s)\n", err, err_name);
1821 /* print a human-readable message describing the error if available */
1822 nss_print_error_message(conn->data, err);
1824 *curlcode = (is_cc_error(err))
1825 ? CURLE_SSL_CERTPROBLEM
1832 return rc; /* number of bytes */
1835 static ssize_t nss_recv(struct connectdata * conn, /* connection data */
1836 int num, /* socketindex */
1837 char *buf, /* store read data here */
1838 size_t buffersize, /* max amount to read */
1841 ssize_t nread = PR_Recv(conn->ssl[num].handle, buf, (int)buffersize, 0,
1842 PR_INTERVAL_NO_WAIT);
1844 /* failed SSL read */
1845 PRInt32 err = PR_GetError();
1847 if(err == PR_WOULD_BLOCK_ERROR)
1848 *curlcode = CURLE_AGAIN;
1850 /* print the error number and error string */
1851 const char *err_name = nss_error_to_name(err);
1852 infof(conn->data, "SSL read: errno %d (%s)\n", err, err_name);
1854 /* print a human-readable message describing the error if available */
1855 nss_print_error_message(conn->data, err);
1857 *curlcode = (is_cc_error(err))
1858 ? CURLE_SSL_CERTPROBLEM
1868 size_t Curl_nss_version(char *buffer, size_t size)
1870 return snprintf(buffer, size, "NSS/%s", NSS_VERSION);
1873 int Curl_nss_seed(struct SessionHandle *data)
1875 /* make sure that NSS is initialized */
1876 return !!Curl_nss_force_init(data);
1879 /* data might be NULL */
1880 int Curl_nss_random(struct SessionHandle *data,
1881 unsigned char *entropy,
1885 Curl_nss_seed(data); /* Initiate the seed if not already done */
1887 if(SECSuccess != PK11_GenerateRandom(entropy, curlx_uztosi(length))) {
1888 /* no way to signal a failure from here, we have to abort */
1889 failf(data, "PK11_GenerateRandom() failed, calling abort()...");
1896 void Curl_nss_md5sum(unsigned char *tmp, /* input */
1898 unsigned char *md5sum, /* output */
1901 PK11Context *MD5pw = PK11_CreateDigestContext(SEC_OID_MD5);
1902 unsigned int MD5out;
1904 PK11_DigestOp(MD5pw, tmp, curlx_uztoui(tmplen));
1905 PK11_DigestFinal(MD5pw, md5sum, &MD5out, curlx_uztoui(md5len));
1906 PK11_DestroyContext(MD5pw, PR_TRUE);
1909 #endif /* USE_NSS */