1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2017, 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 https://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 */
41 #include "curl_printf.h"
59 #include <keyhi.h> /* for SECKEY_DestroyPublicKey() */
60 #include <private/pprio.h> /* for PR_ImportTCPSocket */
62 #define NSSVERNUM ((NSS_VMAJOR<<16)|(NSS_VMINOR<<8)|NSS_VPATCH)
64 #if NSSVERNUM >= 0x030f00 /* 3.15.0 */
72 /* The last #include files should be: */
73 #include "curl_memory.h"
76 #define SSL_DIR "/etc/pki/nssdb"
78 /* enough to fit the string "PEM Token #[0|1]" */
81 struct ssl_backend_data {
83 char *client_nickname;
84 struct Curl_easy *data;
85 struct curl_llist obj_list;
86 PK11GenericObject *obj_clicert;
89 #define BACKEND connssl->backend
91 static PRLock *nss_initlock = NULL;
92 static PRLock *nss_crllock = NULL;
93 static PRLock *nss_findslot_lock = NULL;
94 static PRLock *nss_trustload_lock = NULL;
95 static struct curl_llist nss_crl_list;
96 static NSSInitContext *nss_context = NULL;
97 static volatile int initialized = 0;
99 /* type used to wrap pointers as list nodes */
100 struct ptr_list_wrap {
102 struct curl_llist_element node;
110 #define PK11_SETATTRS(_attr, _idx, _type, _val, _len) do { \
111 CK_ATTRIBUTE *ptr = (_attr) + ((_idx)++); \
112 ptr->type = (_type); \
113 ptr->pValue = (_val); \
114 ptr->ulValueLen = (_len); \
117 #define CERT_NewTempCertificate __CERT_NewTempCertificate
119 #define NUM_OF_CIPHERS sizeof(cipherlist)/sizeof(cipherlist[0])
120 static const cipher_s cipherlist[] = {
121 /* SSL2 cipher suites */
122 {"rc4", SSL_EN_RC4_128_WITH_MD5},
123 {"rc4-md5", SSL_EN_RC4_128_WITH_MD5},
124 {"rc4export", SSL_EN_RC4_128_EXPORT40_WITH_MD5},
125 {"rc2", SSL_EN_RC2_128_CBC_WITH_MD5},
126 {"rc2export", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5},
127 {"des", SSL_EN_DES_64_CBC_WITH_MD5},
128 {"desede3", SSL_EN_DES_192_EDE3_CBC_WITH_MD5},
129 /* SSL3/TLS cipher suites */
130 {"rsa_rc4_128_md5", SSL_RSA_WITH_RC4_128_MD5},
131 {"rsa_rc4_128_sha", SSL_RSA_WITH_RC4_128_SHA},
132 {"rsa_3des_sha", SSL_RSA_WITH_3DES_EDE_CBC_SHA},
133 {"rsa_des_sha", SSL_RSA_WITH_DES_CBC_SHA},
134 {"rsa_rc4_40_md5", SSL_RSA_EXPORT_WITH_RC4_40_MD5},
135 {"rsa_rc2_40_md5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5},
136 {"rsa_null_md5", SSL_RSA_WITH_NULL_MD5},
137 {"rsa_null_sha", SSL_RSA_WITH_NULL_SHA},
138 {"fips_3des_sha", SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA},
139 {"fips_des_sha", SSL_RSA_FIPS_WITH_DES_CBC_SHA},
140 {"fortezza", SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA},
141 {"fortezza_rc4_128_sha", SSL_FORTEZZA_DMS_WITH_RC4_128_SHA},
142 {"fortezza_null", SSL_FORTEZZA_DMS_WITH_NULL_SHA},
143 /* TLS 1.0: Exportable 56-bit Cipher Suites. */
144 {"rsa_des_56_sha", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA},
145 {"rsa_rc4_56_sha", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA},
147 {"dhe_dss_aes_128_cbc_sha", TLS_DHE_DSS_WITH_AES_128_CBC_SHA},
148 {"dhe_dss_aes_256_cbc_sha", TLS_DHE_DSS_WITH_AES_256_CBC_SHA},
149 {"dhe_rsa_aes_128_cbc_sha", TLS_DHE_RSA_WITH_AES_128_CBC_SHA},
150 {"dhe_rsa_aes_256_cbc_sha", TLS_DHE_RSA_WITH_AES_256_CBC_SHA},
151 {"rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA},
152 {"rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA},
154 {"ecdh_ecdsa_null_sha", TLS_ECDH_ECDSA_WITH_NULL_SHA},
155 {"ecdh_ecdsa_rc4_128_sha", TLS_ECDH_ECDSA_WITH_RC4_128_SHA},
156 {"ecdh_ecdsa_3des_sha", TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA},
157 {"ecdh_ecdsa_aes_128_sha", TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA},
158 {"ecdh_ecdsa_aes_256_sha", TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA},
159 {"ecdhe_ecdsa_null_sha", TLS_ECDHE_ECDSA_WITH_NULL_SHA},
160 {"ecdhe_ecdsa_rc4_128_sha", TLS_ECDHE_ECDSA_WITH_RC4_128_SHA},
161 {"ecdhe_ecdsa_3des_sha", TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA},
162 {"ecdhe_ecdsa_aes_128_sha", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA},
163 {"ecdhe_ecdsa_aes_256_sha", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA},
164 {"ecdh_rsa_null_sha", TLS_ECDH_RSA_WITH_NULL_SHA},
165 {"ecdh_rsa_128_sha", TLS_ECDH_RSA_WITH_RC4_128_SHA},
166 {"ecdh_rsa_3des_sha", TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA},
167 {"ecdh_rsa_aes_128_sha", TLS_ECDH_RSA_WITH_AES_128_CBC_SHA},
168 {"ecdh_rsa_aes_256_sha", TLS_ECDH_RSA_WITH_AES_256_CBC_SHA},
169 {"ecdhe_rsa_null", TLS_ECDHE_RSA_WITH_NULL_SHA},
170 {"ecdhe_rsa_rc4_128_sha", TLS_ECDHE_RSA_WITH_RC4_128_SHA},
171 {"ecdhe_rsa_3des_sha", TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA},
172 {"ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
173 {"ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA},
174 {"ecdh_anon_null_sha", TLS_ECDH_anon_WITH_NULL_SHA},
175 {"ecdh_anon_rc4_128sha", TLS_ECDH_anon_WITH_RC4_128_SHA},
176 {"ecdh_anon_3des_sha", TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA},
177 {"ecdh_anon_aes_128_sha", TLS_ECDH_anon_WITH_AES_128_CBC_SHA},
178 {"ecdh_anon_aes_256_sha", TLS_ECDH_anon_WITH_AES_256_CBC_SHA},
179 #ifdef TLS_RSA_WITH_NULL_SHA256
180 /* new HMAC-SHA256 cipher suites specified in RFC */
181 {"rsa_null_sha_256", TLS_RSA_WITH_NULL_SHA256},
182 {"rsa_aes_128_cbc_sha_256", TLS_RSA_WITH_AES_128_CBC_SHA256},
183 {"rsa_aes_256_cbc_sha_256", TLS_RSA_WITH_AES_256_CBC_SHA256},
184 {"dhe_rsa_aes_128_cbc_sha_256", TLS_DHE_RSA_WITH_AES_128_CBC_SHA256},
185 {"dhe_rsa_aes_256_cbc_sha_256", TLS_DHE_RSA_WITH_AES_256_CBC_SHA256},
186 {"ecdhe_ecdsa_aes_128_cbc_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256},
187 {"ecdhe_rsa_aes_128_cbc_sha_256", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256},
189 #ifdef TLS_RSA_WITH_AES_128_GCM_SHA256
190 /* AES GCM cipher suites in RFC 5288 and RFC 5289 */
191 {"rsa_aes_128_gcm_sha_256", TLS_RSA_WITH_AES_128_GCM_SHA256},
192 {"dhe_rsa_aes_128_gcm_sha_256", TLS_DHE_RSA_WITH_AES_128_GCM_SHA256},
193 {"dhe_dss_aes_128_gcm_sha_256", TLS_DHE_DSS_WITH_AES_128_GCM_SHA256},
194 {"ecdhe_ecdsa_aes_128_gcm_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
195 {"ecdh_ecdsa_aes_128_gcm_sha_256", TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256},
196 {"ecdhe_rsa_aes_128_gcm_sha_256", TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
197 {"ecdh_rsa_aes_128_gcm_sha_256", TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256},
199 #ifdef TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
200 /* cipher suites using SHA384 */
201 {"rsa_aes_256_gcm_sha_384", TLS_RSA_WITH_AES_256_GCM_SHA384},
202 {"dhe_rsa_aes_256_gcm_sha_384", TLS_DHE_RSA_WITH_AES_256_GCM_SHA384},
203 {"dhe_dss_aes_256_gcm_sha_384", TLS_DHE_DSS_WITH_AES_256_GCM_SHA384},
204 {"ecdhe_ecdsa_aes_256_sha_384", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384},
205 {"ecdhe_rsa_aes_256_sha_384", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384},
206 {"ecdhe_ecdsa_aes_256_gcm_sha_384", TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384},
207 {"ecdhe_rsa_aes_256_gcm_sha_384", TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384},
209 #ifdef TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256
210 /* chacha20-poly1305 cipher suites */
211 {"ecdhe_rsa_chacha20_poly1305_sha_256",
212 TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256},
213 {"ecdhe_ecdsa_chacha20_poly1305_sha_256",
214 TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256},
215 {"dhe_rsa_chacha20_poly1305_sha_256",
216 TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256},
220 static const char *pem_library = "libnsspem.so";
221 static SECMODModule *pem_module = NULL;
223 static const char *trust_library = "libnssckbi.so";
224 static SECMODModule *trust_module = NULL;
226 /* NSPR I/O layer we use to detect blocking direction during SSL handshake */
227 static PRDescIdentity nspr_io_identity = PR_INVALID_IO_LAYER;
228 static PRIOMethods nspr_io_methods;
230 static const char *nss_error_to_name(PRErrorCode code)
232 const char *name = PR_ErrorToName(code);
236 return "unknown error";
239 static void nss_print_error_message(struct Curl_easy *data, PRUint32 err)
241 failf(data, "%s", PR_ErrorToString(err, PR_LANGUAGE_I_DEFAULT));
244 static SECStatus set_ciphers(struct Curl_easy *data, PRFileDesc * model,
248 PRBool cipher_state[NUM_OF_CIPHERS];
252 /* use accessors to avoid dynamic linking issues after an update of NSS */
253 const PRUint16 num_implemented_ciphers = SSL_GetNumImplementedCiphers();
254 const PRUint16 *implemented_ciphers = SSL_GetImplementedCiphers();
255 if(!implemented_ciphers)
258 /* First disable all ciphers. This uses a different max value in case
259 * NSS adds more ciphers later we don't want them available by
262 for(i = 0; i < num_implemented_ciphers; i++) {
263 SSL_CipherPrefSet(model, implemented_ciphers[i], PR_FALSE);
266 /* Set every entry in our list to false */
267 for(i = 0; i < NUM_OF_CIPHERS; i++) {
268 cipher_state[i] = PR_FALSE;
271 cipher = cipher_list;
273 while(cipher_list && (cipher_list[0])) {
274 while((*cipher) && (ISSPACE(*cipher)))
277 cipher_list = strchr(cipher, ',');
279 *cipher_list++ = '\0';
284 for(i = 0; i<NUM_OF_CIPHERS; i++) {
285 if(strcasecompare(cipher, cipherlist[i].name)) {
286 cipher_state[i] = PR_TRUE;
292 if(found == PR_FALSE) {
293 failf(data, "Unknown cipher in list: %s", cipher);
298 cipher = cipher_list;
302 /* Finally actually enable the selected ciphers */
303 for(i = 0; i<NUM_OF_CIPHERS; i++) {
307 if(SSL_CipherPrefSet(model, cipherlist[i].num, PR_TRUE) != SECSuccess) {
308 failf(data, "cipher-suite not supported by NSS: %s", cipherlist[i].name);
317 * Return true if at least one cipher-suite is enabled. Used to determine
318 * if we need to call NSS_SetDomesticPolicy() to enable the default ciphers.
320 static bool any_cipher_enabled(void)
324 for(i = 0; i<NUM_OF_CIPHERS; i++) {
326 SSL_CipherPolicyGet(cipherlist[i].num, &policy);
335 * Determine whether the nickname passed in is a filename that needs to
336 * be loaded as a PEM or a regular NSS nickname.
338 * returns 1 for a file
339 * returns 0 for not a file (NSS nickname)
341 static int is_file(const char *filename)
348 if(stat(filename, &st) == 0)
349 if(S_ISREG(st.st_mode))
355 /* Check if the given string is filename or nickname of a certificate. If the
356 * given string is recognized as filename, return NULL. If the given string is
357 * recognized as nickname, return a duplicated string. The returned string
358 * should be later deallocated using free(). If the OOM failure occurs, we
361 static char *dup_nickname(struct Curl_easy *data, const char *str)
366 /* no such file exists, use the string as nickname */
369 /* search the first slash; we require at least one slash in a file name */
370 n = strchr(str, '/');
372 infof(data, "warning: certificate file name \"%s\" handled as nickname; "
373 "please use \"./%s\" to force file name\n", str, str);
377 /* we'll use the PEM reader to read the certificate from file */
381 /* Lock/unlock wrapper for PK11_FindSlotByName() to work around race condition
382 * in nssSlot_IsTokenPresent() causing spurious SEC_ERROR_NO_TOKEN. For more
383 * details, go to <https://bugzilla.mozilla.org/1297397>.
385 static PK11SlotInfo* nss_find_slot_by_name(const char *slot_name)
388 PR_Lock(nss_findslot_lock);
389 slot = PK11_FindSlotByName(slot_name);
390 PR_Unlock(nss_findslot_lock);
394 /* wrap 'ptr' as list node and tail-insert into 'list' */
395 static CURLcode insert_wrapped_ptr(struct curl_llist *list, void *ptr)
397 struct ptr_list_wrap *wrap = malloc(sizeof *wrap);
399 return CURLE_OUT_OF_MEMORY;
402 Curl_llist_insert_next(list, list->tail, wrap, &wrap->node);
406 /* Call PK11_CreateGenericObject() with the given obj_class and filename. If
407 * the call succeeds, append the object handle to the list of objects so that
408 * the object can be destroyed in Curl_nss_close(). */
409 static CURLcode nss_create_object(struct ssl_connect_data *connssl,
410 CK_OBJECT_CLASS obj_class,
411 const char *filename, bool cacert)
414 PK11GenericObject *obj;
415 CK_BBOOL cktrue = CK_TRUE;
416 CK_BBOOL ckfalse = CK_FALSE;
417 CK_ATTRIBUTE attrs[/* max count of attributes */ 4];
419 CURLcode result = (cacert)
420 ? CURLE_SSL_CACERT_BADFILE
421 : CURLE_SSL_CERTPROBLEM;
423 const int slot_id = (cacert) ? 0 : 1;
424 char *slot_name = aprintf("PEM Token #%d", slot_id);
426 return CURLE_OUT_OF_MEMORY;
428 slot = nss_find_slot_by_name(slot_name);
433 PK11_SETATTRS(attrs, attr_cnt, CKA_CLASS, &obj_class, sizeof(obj_class));
434 PK11_SETATTRS(attrs, attr_cnt, CKA_TOKEN, &cktrue, sizeof(CK_BBOOL));
435 PK11_SETATTRS(attrs, attr_cnt, CKA_LABEL, (unsigned char *)filename,
436 (CK_ULONG)strlen(filename) + 1);
438 if(CKO_CERTIFICATE == obj_class) {
439 CK_BBOOL *pval = (cacert) ? (&cktrue) : (&ckfalse);
440 PK11_SETATTRS(attrs, attr_cnt, CKA_TRUST, pval, sizeof(*pval));
443 /* PK11_CreateManagedGenericObject() was introduced in NSS 3.34 because
444 * PK11_DestroyGenericObject() does not release resources allocated by
445 * PK11_CreateGenericObject() early enough. */
447 #ifdef HAVE_PK11_CREATEMANAGEDGENERICOBJECT
448 PK11_CreateManagedGenericObject
450 PK11_CreateGenericObject
452 (slot, attrs, attr_cnt, PR_FALSE);
458 if(insert_wrapped_ptr(&BACKEND->obj_list, obj) != CURLE_OK) {
459 PK11_DestroyGenericObject(obj);
460 return CURLE_OUT_OF_MEMORY;
463 if(!cacert && CKO_CERTIFICATE == obj_class)
464 /* store reference to a client certificate */
465 BACKEND->obj_clicert = obj;
470 /* Destroy the NSS object whose handle is given by ptr. This function is
471 * a callback of Curl_llist_alloc() used by Curl_llist_destroy() to destroy
472 * NSS objects in Curl_nss_close() */
473 static void nss_destroy_object(void *user, void *ptr)
475 struct ptr_list_wrap *wrap = (struct ptr_list_wrap *) ptr;
476 PK11GenericObject *obj = (PK11GenericObject *) wrap->ptr;
478 PK11_DestroyGenericObject(obj);
482 /* same as nss_destroy_object() but for CRL items */
483 static void nss_destroy_crl_item(void *user, void *ptr)
485 struct ptr_list_wrap *wrap = (struct ptr_list_wrap *) ptr;
486 SECItem *crl_der = (SECItem *) wrap->ptr;
488 SECITEM_FreeItem(crl_der, PR_TRUE);
492 static CURLcode nss_load_cert(struct ssl_connect_data *ssl,
493 const char *filename, PRBool cacert)
495 CURLcode result = (cacert)
496 ? CURLE_SSL_CACERT_BADFILE
497 : CURLE_SSL_CERTPROBLEM;
499 /* libnsspem.so leaks memory if the requested file does not exist. For more
500 * details, go to <https://bugzilla.redhat.com/734760>. */
501 if(is_file(filename))
502 result = nss_create_object(ssl, CKO_CERTIFICATE, filename, cacert);
504 if(!result && !cacert) {
505 /* we have successfully loaded a client certificate */
506 CERTCertificate *cert;
507 char *nickname = NULL;
508 char *n = strrchr(filename, '/');
512 /* The following undocumented magic helps to avoid a SIGSEGV on call
513 * of PK11_ReadRawAttribute() from SelectClientCert() when using an
514 * immature version of libnsspem.so. For more details, go to
515 * <https://bugzilla.redhat.com/733685>. */
516 nickname = aprintf("PEM Token #1:%s", n);
518 cert = PK11_FindCertFromNickname(nickname, NULL);
520 CERT_DestroyCertificate(cert);
529 /* add given CRL to cache if it is not already there */
530 static CURLcode nss_cache_crl(SECItem *crl_der)
532 CERTCertDBHandle *db = CERT_GetDefaultCertDB();
533 CERTSignedCrl *crl = SEC_FindCrlByDERCert(db, crl_der, 0);
535 /* CRL already cached */
537 SECITEM_FreeItem(crl_der, PR_TRUE);
541 /* acquire lock before call of CERT_CacheCRL() and accessing nss_crl_list */
542 PR_Lock(nss_crllock);
544 /* store the CRL item so that we can free it in Curl_nss_cleanup() */
545 if(insert_wrapped_ptr(&nss_crl_list, crl_der) != CURLE_OK) {
546 SECITEM_FreeItem(crl_der, PR_TRUE);
547 PR_Unlock(nss_crllock);
548 return CURLE_OUT_OF_MEMORY;
551 if(SECSuccess != CERT_CacheCRL(db, crl_der)) {
552 /* unable to cache CRL */
553 PR_Unlock(nss_crllock);
554 return CURLE_SSL_CRL_BADFILE;
557 /* we need to clear session cache, so that the CRL could take effect */
558 SSL_ClearSessionCache();
559 PR_Unlock(nss_crllock);
563 static CURLcode nss_load_crl(const char *crlfilename)
567 SECItem filedata = { 0, NULL, 0 };
568 SECItem *crl_der = NULL;
571 infile = PR_Open(crlfilename, PR_RDONLY, 0);
573 return CURLE_SSL_CRL_BADFILE;
575 if(PR_SUCCESS != PR_GetOpenFileInfo(infile, &info))
578 if(!SECITEM_AllocItem(NULL, &filedata, info.size + /* zero ended */ 1))
581 if(info.size != PR_Read(infile, filedata.data, info.size))
584 crl_der = SECITEM_AllocItem(NULL, NULL, 0U);
588 /* place a trailing zero right after the visible data */
589 body = (char *)filedata.data;
590 body[--filedata.len] = '\0';
592 body = strstr(body, "-----BEGIN");
596 char *begin = PORT_Strchr(body, '\n');
598 begin = PORT_Strchr(body, '\r');
602 trailer = strstr(++begin, "-----END");
606 /* retrieve DER from ASCII */
608 if(ATOB_ConvertAsciiToItem(crl_der, begin))
611 SECITEM_FreeItem(&filedata, PR_FALSE);
618 return nss_cache_crl(crl_der);
622 SECITEM_FreeItem(crl_der, PR_TRUE);
623 SECITEM_FreeItem(&filedata, PR_FALSE);
624 return CURLE_SSL_CRL_BADFILE;
627 static CURLcode nss_load_key(struct connectdata *conn, int sockindex,
630 PK11SlotInfo *slot, *tmp;
633 struct ssl_connect_data *ssl = conn->ssl;
634 struct Curl_easy *data = conn->data;
636 (void)sockindex; /* unused */
638 result = nss_create_object(ssl, CKO_PRIVATE_KEY, key_file, FALSE);
640 PR_SetError(SEC_ERROR_BAD_KEY, 0);
644 slot = nss_find_slot_by_name("PEM Token #1");
646 return CURLE_SSL_CERTPROBLEM;
648 /* This will force the token to be seen as re-inserted */
649 tmp = SECMOD_WaitForAnyTokenEvent(pem_module, 0, 0);
652 PK11_IsPresent(slot);
654 status = PK11_Authenticate(slot, PR_TRUE, SSL_SET_OPTION(key_passwd));
657 return (SECSuccess == status) ? CURLE_OK : CURLE_SSL_CERTPROBLEM;
660 static int display_error(struct connectdata *conn, PRInt32 err,
661 const char *filename)
664 case SEC_ERROR_BAD_PASSWORD:
665 failf(conn->data, "Unable to load client key: Incorrect password");
667 case SEC_ERROR_UNKNOWN_CERT:
668 failf(conn->data, "Unable to load certificate %s", filename);
673 return 0; /* The caller will print a generic error */
676 static CURLcode cert_stuff(struct connectdata *conn, int sockindex,
677 char *cert_file, char *key_file)
679 struct Curl_easy *data = conn->data;
683 result = nss_load_cert(&conn->ssl[sockindex], cert_file, PR_FALSE);
685 const PRErrorCode err = PR_GetError();
686 if(!display_error(conn, err, cert_file)) {
687 const char *err_name = nss_error_to_name(err);
688 failf(data, "unable to load client cert: %d (%s)", err, err_name);
695 if(key_file || (is_file(cert_file))) {
697 result = nss_load_key(conn, sockindex, key_file);
699 /* In case the cert file also has the key */
700 result = nss_load_key(conn, sockindex, cert_file);
702 const PRErrorCode err = PR_GetError();
703 if(!display_error(conn, err, key_file)) {
704 const char *err_name = nss_error_to_name(err);
705 failf(data, "unable to load client key: %d (%s)", err, err_name);
715 static char *nss_get_password(PK11SlotInfo *slot, PRBool retry, void *arg)
717 (void)slot; /* unused */
719 if(retry || NULL == arg)
722 return (char *)PORT_Strdup((char *)arg);
725 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
727 static SECStatus nss_auth_cert_hook(void *arg, PRFileDesc *fd, PRBool checksig,
730 struct connectdata *conn = (struct connectdata *)arg;
732 #ifdef SSL_ENABLE_OCSP_STAPLING
733 if(SSL_CONN_CONFIG(verifystatus)) {
734 SECStatus cacheResult;
736 const SECItemArray *csa = SSL_PeerStapledOCSPResponses(fd);
738 failf(conn->data, "Invalid OCSP response");
743 failf(conn->data, "No OCSP response received");
747 cacheResult = CERT_CacheOCSPResponseFromSideChannel(
748 CERT_GetDefaultCertDB(), SSL_PeerCertificate(fd),
749 PR_Now(), &csa->items[0], arg
752 if(cacheResult != SECSuccess) {
753 failf(conn->data, "Invalid OCSP response");
759 if(!SSL_CONN_CONFIG(verifypeer)) {
760 infof(conn->data, "skipping SSL peer certificate verification\n");
764 return SSL_AuthCertificate(CERT_GetDefaultCertDB(), fd, checksig, isServer);
768 * Inform the application that the handshake is complete.
770 static void HandshakeCallback(PRFileDesc *sock, void *arg)
772 struct connectdata *conn = (struct connectdata*) arg;
773 unsigned int buflenmax = 50;
774 unsigned char buf[50];
776 SSLNextProtoState state;
778 if(!conn->bits.tls_enable_npn && !conn->bits.tls_enable_alpn) {
782 if(SSL_GetNextProto(sock, &state, buf, &buflen, buflenmax) == SECSuccess) {
785 #if NSSVERNUM >= 0x031a00 /* 3.26.0 */
786 /* used by NSS internally to implement 0-RTT */
787 case SSL_NEXT_PROTO_EARLY_VALUE:
790 case SSL_NEXT_PROTO_NO_SUPPORT:
791 case SSL_NEXT_PROTO_NO_OVERLAP:
792 infof(conn->data, "ALPN/NPN, server did not agree to a protocol\n");
794 #ifdef SSL_ENABLE_ALPN
795 case SSL_NEXT_PROTO_SELECTED:
796 infof(conn->data, "ALPN, server accepted to use %.*s\n", buflen, buf);
799 case SSL_NEXT_PROTO_NEGOTIATED:
800 infof(conn->data, "NPN, server accepted to use %.*s\n", buflen, buf);
805 if(buflen == NGHTTP2_PROTO_VERSION_ID_LEN &&
806 !memcmp(NGHTTP2_PROTO_VERSION_ID, buf, NGHTTP2_PROTO_VERSION_ID_LEN)) {
807 conn->negnpn = CURL_HTTP_VERSION_2;
811 if(buflen == ALPN_HTTP_1_1_LENGTH &&
812 !memcmp(ALPN_HTTP_1_1, buf, ALPN_HTTP_1_1_LENGTH)) {
813 conn->negnpn = CURL_HTTP_VERSION_1_1;
818 #if NSSVERNUM >= 0x030f04 /* 3.15.4 */
819 static SECStatus CanFalseStartCallback(PRFileDesc *sock, void *client_data,
820 PRBool *canFalseStart)
822 struct connectdata *conn = client_data;
823 struct Curl_easy *data = conn->data;
825 SSLChannelInfo channelInfo;
826 SSLCipherSuiteInfo cipherInfo;
829 PRBool negotiatedExtension;
831 *canFalseStart = PR_FALSE;
833 if(SSL_GetChannelInfo(sock, &channelInfo, sizeof(channelInfo)) != SECSuccess)
836 if(SSL_GetCipherSuiteInfo(channelInfo.cipherSuite, &cipherInfo,
837 sizeof(cipherInfo)) != SECSuccess)
840 /* Prevent version downgrade attacks from TLS 1.2, and avoid False Start for
841 * TLS 1.3 and later. See https://bugzilla.mozilla.org/show_bug.cgi?id=861310
843 if(channelInfo.protocolVersion != SSL_LIBRARY_VERSION_TLS_1_2)
846 /* Only allow ECDHE key exchange algorithm.
847 * See https://bugzilla.mozilla.org/show_bug.cgi?id=952863 */
848 if(cipherInfo.keaType != ssl_kea_ecdh)
851 /* Prevent downgrade attacks on the symmetric cipher. We do not allow CBC
852 * mode due to BEAST, POODLE, and other attacks on the MAC-then-Encrypt
853 * design. See https://bugzilla.mozilla.org/show_bug.cgi?id=1109766 */
854 if(cipherInfo.symCipher != ssl_calg_aes_gcm)
857 /* Enforce ALPN or NPN to do False Start, as an indicator of server
859 rv = SSL_HandshakeNegotiatedExtension(sock, ssl_app_layer_protocol_xtn,
860 &negotiatedExtension);
861 if(rv != SECSuccess || !negotiatedExtension) {
862 rv = SSL_HandshakeNegotiatedExtension(sock, ssl_next_proto_nego_xtn,
863 &negotiatedExtension);
866 if(rv != SECSuccess || !negotiatedExtension)
869 *canFalseStart = PR_TRUE;
871 infof(data, "Trying TLS False Start\n");
878 static void display_cert_info(struct Curl_easy *data,
879 CERTCertificate *cert)
881 char *subject, *issuer, *common_name;
882 PRExplodedTime printableTime;
883 char timeString[256];
884 PRTime notBefore, notAfter;
886 subject = CERT_NameToAscii(&cert->subject);
887 issuer = CERT_NameToAscii(&cert->issuer);
888 common_name = CERT_GetCommonName(&cert->subject);
889 infof(data, "\tsubject: %s\n", subject);
891 CERT_GetCertTimes(cert, ¬Before, ¬After);
892 PR_ExplodeTime(notBefore, PR_GMTParameters, &printableTime);
893 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
894 infof(data, "\tstart date: %s\n", timeString);
895 PR_ExplodeTime(notAfter, PR_GMTParameters, &printableTime);
896 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
897 infof(data, "\texpire date: %s\n", timeString);
898 infof(data, "\tcommon name: %s\n", common_name);
899 infof(data, "\tissuer: %s\n", issuer);
903 PR_Free(common_name);
906 static CURLcode display_conn_info(struct connectdata *conn, PRFileDesc *sock)
908 CURLcode result = CURLE_OK;
909 SSLChannelInfo channel;
910 SSLCipherSuiteInfo suite;
911 CERTCertificate *cert;
912 CERTCertificate *cert2;
913 CERTCertificate *cert3;
917 if(SSL_GetChannelInfo(sock, &channel, sizeof channel) ==
918 SECSuccess && channel.length == sizeof channel &&
919 channel.cipherSuite) {
920 if(SSL_GetCipherSuiteInfo(channel.cipherSuite,
921 &suite, sizeof suite) == SECSuccess) {
922 infof(conn->data, "SSL connection using %s\n", suite.cipherSuiteName);
926 cert = SSL_PeerCertificate(sock);
928 infof(conn->data, "Server certificate:\n");
930 if(!conn->data->set.ssl.certinfo) {
931 display_cert_info(conn->data, cert);
932 CERT_DestroyCertificate(cert);
935 /* Count certificates in chain. */
939 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
943 CERT_DestroyCertificate(cert2);
946 cert3 = CERT_FindCertIssuer(cert2, now, certUsageSSLCA);
947 CERT_DestroyCertificate(cert2);
952 result = Curl_ssl_init_certinfo(conn->data, i);
954 for(i = 0; cert; cert = cert2) {
955 result = Curl_extract_certinfo(conn, i++, (char *)cert->derCert.data,
956 (char *)cert->derCert.data +
962 CERT_DestroyCertificate(cert);
966 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
967 CERT_DestroyCertificate(cert);
976 static SECStatus BadCertHandler(void *arg, PRFileDesc *sock)
978 struct connectdata *conn = (struct connectdata *)arg;
979 struct Curl_easy *data = conn->data;
980 PRErrorCode err = PR_GetError();
981 CERTCertificate *cert;
983 /* remember the cert verification result */
985 data->set.proxy_ssl.certverifyresult = err;
987 data->set.ssl.certverifyresult = err;
989 if(err == SSL_ERROR_BAD_CERT_DOMAIN && !SSL_CONN_CONFIG(verifyhost))
990 /* we are asked not to verify the host name */
993 /* print only info about the cert, the error is printed off the callback */
994 cert = SSL_PeerCertificate(sock);
996 infof(data, "Server certificate:\n");
997 display_cert_info(data, cert);
998 CERT_DestroyCertificate(cert);
1006 * Check that the Peer certificate's issuer certificate matches the one found
1007 * by issuer_nickname. This is not exactly the way OpenSSL and GNU TLS do the
1008 * issuer check, so we provide comments that mimic the OpenSSL
1009 * X509_check_issued function (in x509v3/v3_purp.c)
1011 static SECStatus check_issuer_cert(PRFileDesc *sock,
1012 char *issuer_nickname)
1014 CERTCertificate *cert, *cert_issuer, *issuer;
1015 SECStatus res = SECSuccess;
1016 void *proto_win = NULL;
1018 cert = SSL_PeerCertificate(sock);
1019 cert_issuer = CERT_FindCertIssuer(cert, PR_Now(), certUsageObjectSigner);
1021 proto_win = SSL_RevealPinArg(sock);
1022 issuer = PK11_FindCertFromNickname(issuer_nickname, proto_win);
1024 if((!cert_issuer) || (!issuer))
1026 else if(SECITEM_CompareItem(&cert_issuer->derCert,
1027 &issuer->derCert) != SECEqual)
1030 CERT_DestroyCertificate(cert);
1031 CERT_DestroyCertificate(issuer);
1032 CERT_DestroyCertificate(cert_issuer);
1036 static CURLcode cmp_peer_pubkey(struct ssl_connect_data *connssl,
1037 const char *pinnedpubkey)
1039 CURLcode result = CURLE_SSL_PINNEDPUBKEYNOTMATCH;
1040 struct Curl_easy *data = BACKEND->data;
1041 CERTCertificate *cert;
1044 /* no pinned public key specified */
1047 /* get peer certificate */
1048 cert = SSL_PeerCertificate(BACKEND->handle);
1050 /* extract public key from peer certificate */
1051 SECKEYPublicKey *pubkey = CERT_ExtractPublicKey(cert);
1053 /* encode the public key as DER */
1054 SECItem *cert_der = PK11_DEREncodePublicKey(pubkey);
1056 /* compare the public key with the pinned public key */
1057 result = Curl_pin_peer_pubkey(data, pinnedpubkey, cert_der->data,
1059 SECITEM_FreeItem(cert_der, PR_TRUE);
1061 SECKEY_DestroyPublicKey(pubkey);
1063 CERT_DestroyCertificate(cert);
1066 /* report the resulting status */
1069 infof(data, "pinned public key verified successfully!\n");
1071 case CURLE_SSL_PINNEDPUBKEYNOTMATCH:
1072 failf(data, "failed to verify pinned public key");
1084 * Callback to pick the SSL client certificate.
1086 static SECStatus SelectClientCert(void *arg, PRFileDesc *sock,
1087 struct CERTDistNamesStr *caNames,
1088 struct CERTCertificateStr **pRetCert,
1089 struct SECKEYPrivateKeyStr **pRetKey)
1091 struct ssl_connect_data *connssl = (struct ssl_connect_data *)arg;
1092 struct Curl_easy *data = BACKEND->data;
1093 const char *nickname = BACKEND->client_nickname;
1094 static const char pem_slotname[] = "PEM Token #1";
1096 if(BACKEND->obj_clicert) {
1097 /* use the cert/key provided by PEM reader */
1098 SECItem cert_der = { 0, NULL, 0 };
1099 void *proto_win = SSL_RevealPinArg(sock);
1100 struct CERTCertificateStr *cert;
1101 struct SECKEYPrivateKeyStr *key;
1103 PK11SlotInfo *slot = nss_find_slot_by_name(pem_slotname);
1105 failf(data, "NSS: PK11 slot not found: %s", pem_slotname);
1109 if(PK11_ReadRawAttribute(PK11_TypeGeneric, BACKEND->obj_clicert, CKA_VALUE,
1110 &cert_der) != SECSuccess) {
1111 failf(data, "NSS: CKA_VALUE not found in PK11 generic object");
1112 PK11_FreeSlot(slot);
1116 cert = PK11_FindCertFromDERCertItem(slot, &cert_der, proto_win);
1117 SECITEM_FreeItem(&cert_der, PR_FALSE);
1119 failf(data, "NSS: client certificate from file not found");
1120 PK11_FreeSlot(slot);
1124 key = PK11_FindPrivateKeyFromCert(slot, cert, NULL);
1125 PK11_FreeSlot(slot);
1127 failf(data, "NSS: private key from file not found");
1128 CERT_DestroyCertificate(cert);
1132 infof(data, "NSS: client certificate from file\n");
1133 display_cert_info(data, cert);
1140 /* use the default NSS hook */
1141 if(SECSuccess != NSS_GetClientAuthData((void *)nickname, sock, caNames,
1143 || NULL == *pRetCert) {
1145 if(NULL == nickname)
1146 failf(data, "NSS: client certificate not found (nickname not "
1149 failf(data, "NSS: client certificate not found: %s", nickname);
1154 /* get certificate nickname if any */
1155 nickname = (*pRetCert)->nickname;
1156 if(NULL == nickname)
1157 nickname = "[unknown]";
1159 if(!strncmp(nickname, pem_slotname, sizeof(pem_slotname) - 1U)) {
1160 failf(data, "NSS: refusing previously loaded certificate from file: %s",
1165 if(NULL == *pRetKey) {
1166 failf(data, "NSS: private key not found for certificate: %s", nickname);
1170 infof(data, "NSS: using client certificate: %s\n", nickname);
1171 display_cert_info(data, *pRetCert);
1175 /* update blocking direction in case of PR_WOULD_BLOCK_ERROR */
1176 static void nss_update_connecting_state(ssl_connect_state state, void *secret)
1178 struct ssl_connect_data *connssl = (struct ssl_connect_data *)secret;
1179 if(PR_GetError() != PR_WOULD_BLOCK_ERROR)
1180 /* an unrelated error is passing by */
1183 switch(connssl->connecting_state) {
1185 case ssl_connect_2_reading:
1186 case ssl_connect_2_writing:
1189 /* we are not called from an SSL handshake */
1193 /* update the state accordingly */
1194 connssl->connecting_state = state;
1197 /* recv() wrapper we use to detect blocking direction during SSL handshake */
1198 static PRInt32 nspr_io_recv(PRFileDesc *fd, void *buf, PRInt32 amount,
1199 PRIntn flags, PRIntervalTime timeout)
1201 const PRRecvFN recv_fn = fd->lower->methods->recv;
1202 const PRInt32 rv = recv_fn(fd->lower, buf, amount, flags, timeout);
1204 /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */
1205 nss_update_connecting_state(ssl_connect_2_reading, fd->secret);
1209 /* send() wrapper we use to detect blocking direction during SSL handshake */
1210 static PRInt32 nspr_io_send(PRFileDesc *fd, const void *buf, PRInt32 amount,
1211 PRIntn flags, PRIntervalTime timeout)
1213 const PRSendFN send_fn = fd->lower->methods->send;
1214 const PRInt32 rv = send_fn(fd->lower, buf, amount, flags, timeout);
1216 /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */
1217 nss_update_connecting_state(ssl_connect_2_writing, fd->secret);
1221 /* close() wrapper to avoid assertion failure due to fd->secret != NULL */
1222 static PRStatus nspr_io_close(PRFileDesc *fd)
1224 const PRCloseFN close_fn = PR_GetDefaultIOMethods()->close;
1226 return close_fn(fd);
1229 /* load a PKCS #11 module */
1230 static CURLcode nss_load_module(SECMODModule **pmod, const char *library,
1233 char *config_string;
1234 SECMODModule *module = *pmod;
1236 /* already loaded */
1239 config_string = aprintf("library=%s name=%s", library, name);
1241 return CURLE_OUT_OF_MEMORY;
1243 module = SECMOD_LoadUserModule(config_string, NULL, PR_FALSE);
1244 free(config_string);
1246 if(module && module->loaded) {
1247 /* loaded successfully */
1253 SECMOD_DestroyModule(module);
1254 return CURLE_FAILED_INIT;
1257 /* unload a PKCS #11 module */
1258 static void nss_unload_module(SECMODModule **pmod)
1260 SECMODModule *module = *pmod;
1265 if(SECMOD_UnloadUserModule(module) != SECSuccess)
1269 SECMOD_DestroyModule(module);
1273 /* data might be NULL */
1274 static CURLcode nss_init_core(struct Curl_easy *data, const char *cert_dir)
1276 NSSInitParameters initparams;
1278 if(nss_context != NULL)
1281 memset((void *) &initparams, '\0', sizeof(initparams));
1282 initparams.length = sizeof(initparams);
1285 char *certpath = aprintf("sql:%s", cert_dir);
1287 return CURLE_OUT_OF_MEMORY;
1289 infof(data, "Initializing NSS with certpath: %s\n", certpath);
1290 nss_context = NSS_InitContext(certpath, "", "", "", &initparams,
1291 NSS_INIT_READONLY | NSS_INIT_PK11RELOAD);
1294 if(nss_context != NULL)
1297 infof(data, "Unable to initialize NSS database\n");
1300 infof(data, "Initializing NSS with certpath: none\n");
1301 nss_context = NSS_InitContext("", "", "", "", &initparams, NSS_INIT_READONLY
1302 | NSS_INIT_NOCERTDB | NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN
1303 | NSS_INIT_NOROOTINIT | NSS_INIT_OPTIMIZESPACE | NSS_INIT_PK11RELOAD);
1304 if(nss_context != NULL)
1307 infof(data, "Unable to initialize NSS\n");
1308 return CURLE_SSL_CACERT_BADFILE;
1311 /* data might be NULL */
1312 static CURLcode nss_init(struct Curl_easy *data)
1321 /* list of all CRL items we need to destroy in Curl_nss_cleanup() */
1322 Curl_llist_init(&nss_crl_list, nss_destroy_crl_item);
1324 /* First we check if $SSL_DIR points to a valid dir */
1325 cert_dir = getenv("SSL_DIR");
1327 if((stat(cert_dir, &st) != 0) ||
1328 (!S_ISDIR(st.st_mode))) {
1333 /* Now we check if the default location is a valid dir */
1335 if((stat(SSL_DIR, &st) == 0) &&
1336 (S_ISDIR(st.st_mode))) {
1337 cert_dir = (char *)SSL_DIR;
1341 if(nspr_io_identity == PR_INVALID_IO_LAYER) {
1342 /* allocate an identity for our own NSPR I/O layer */
1343 nspr_io_identity = PR_GetUniqueIdentity("libcurl");
1344 if(nspr_io_identity == PR_INVALID_IO_LAYER)
1345 return CURLE_OUT_OF_MEMORY;
1347 /* the default methods just call down to the lower I/O layer */
1348 memcpy(&nspr_io_methods, PR_GetDefaultIOMethods(), sizeof nspr_io_methods);
1350 /* override certain methods in the table by our wrappers */
1351 nspr_io_methods.recv = nspr_io_recv;
1352 nspr_io_methods.send = nspr_io_send;
1353 nspr_io_methods.close = nspr_io_close;
1356 result = nss_init_core(data, cert_dir);
1360 if(!any_cipher_enabled())
1361 NSS_SetDomesticPolicy();
1371 * @retval 0 error initializing SSL
1372 * @retval 1 SSL initialized successfully
1374 static int Curl_nss_init(void)
1376 /* curl_global_init() is not thread-safe so this test is ok */
1377 if(nss_initlock == NULL) {
1378 PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256);
1379 nss_initlock = PR_NewLock();
1380 nss_crllock = PR_NewLock();
1381 nss_findslot_lock = PR_NewLock();
1382 nss_trustload_lock = PR_NewLock();
1385 /* We will actually initialize NSS later */
1390 /* data might be NULL */
1391 CURLcode Curl_nss_force_init(struct Curl_easy *data)
1396 failf(data, "unable to initialize NSS, curl_global_init() should have "
1397 "been called with CURL_GLOBAL_SSL or CURL_GLOBAL_ALL");
1398 return CURLE_FAILED_INIT;
1401 PR_Lock(nss_initlock);
1402 result = nss_init(data);
1403 PR_Unlock(nss_initlock);
1408 /* Global cleanup */
1409 static void Curl_nss_cleanup(void)
1411 /* This function isn't required to be threadsafe and this is only done
1412 * as a safety feature.
1414 PR_Lock(nss_initlock);
1416 /* Free references to client certificates held in the SSL session cache.
1417 * Omitting this hampers destruction of the security module owning
1418 * the certificates. */
1419 SSL_ClearSessionCache();
1421 nss_unload_module(&pem_module);
1422 nss_unload_module(&trust_module);
1423 NSS_ShutdownContext(nss_context);
1427 /* destroy all CRL items */
1428 Curl_llist_destroy(&nss_crl_list, NULL);
1430 PR_Unlock(nss_initlock);
1432 PR_DestroyLock(nss_initlock);
1433 PR_DestroyLock(nss_crllock);
1434 PR_DestroyLock(nss_findslot_lock);
1435 PR_DestroyLock(nss_trustload_lock);
1436 nss_initlock = NULL;
1442 * This function uses SSL_peek to determine connection status.
1445 * 1 means the connection is still in place
1446 * 0 means the connection has been closed
1447 * -1 means the connection status is unknown
1449 static int Curl_nss_check_cxn(struct connectdata *conn)
1451 struct ssl_connect_data *connssl = &conn->ssl[FIRSTSOCKET];
1456 PR_Recv(BACKEND->handle, (void *)&buf, 1, PR_MSG_PEEK,
1457 PR_SecondsToInterval(1));
1459 return 1; /* connection still in place */
1462 return 0; /* connection has been closed */
1464 return -1; /* connection status unknown */
1467 static void nss_close(struct ssl_connect_data *connssl)
1469 /* before the cleanup, check whether we are using a client certificate */
1470 const bool client_cert = (BACKEND->client_nickname != NULL)
1471 || (BACKEND->obj_clicert != NULL);
1473 free(BACKEND->client_nickname);
1474 BACKEND->client_nickname = NULL;
1476 /* destroy all NSS objects in order to avoid failure of NSS shutdown */
1477 Curl_llist_destroy(&BACKEND->obj_list, NULL);
1478 BACKEND->obj_clicert = NULL;
1480 if(BACKEND->handle) {
1482 /* A server might require different authentication based on the
1483 * particular path being requested by the client. To support this
1484 * scenario, we must ensure that a connection will never reuse the
1485 * authentication data from a previous connection. */
1486 SSL_InvalidateSession(BACKEND->handle);
1488 PR_Close(BACKEND->handle);
1489 BACKEND->handle = NULL;
1494 * This function is called when an SSL connection is closed.
1496 static void Curl_nss_close(struct connectdata *conn, int sockindex)
1498 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1499 struct ssl_connect_data *connssl_proxy = &conn->proxy_ssl[sockindex];
1501 if(BACKEND->handle || connssl_proxy->backend->handle) {
1502 /* NSS closes the socket we previously handed to it, so we must mark it
1503 as closed to avoid double close */
1504 fake_sclose(conn->sock[sockindex]);
1505 conn->sock[sockindex] = CURL_SOCKET_BAD;
1509 /* nss_close(connssl) will transitively close also
1510 connssl_proxy->backend->handle if both are used. Clear it to avoid
1511 a double close leading to crash. */
1512 connssl_proxy->backend->handle = NULL;
1515 nss_close(connssl_proxy);
1518 /* return true if NSS can provide error code (and possibly msg) for the
1520 static bool is_nss_error(CURLcode err)
1523 case CURLE_PEER_FAILED_VERIFICATION:
1524 case CURLE_SSL_CACERT:
1525 case CURLE_SSL_CERTPROBLEM:
1526 case CURLE_SSL_CONNECT_ERROR:
1527 case CURLE_SSL_ISSUER_ERROR:
1535 /* return true if the given error code is related to a client certificate */
1536 static bool is_cc_error(PRInt32 err)
1539 case SSL_ERROR_BAD_CERT_ALERT:
1540 case SSL_ERROR_EXPIRED_CERT_ALERT:
1541 case SSL_ERROR_REVOKED_CERT_ALERT:
1549 static Curl_recv nss_recv;
1550 static Curl_send nss_send;
1552 static CURLcode nss_load_ca_certificates(struct connectdata *conn,
1555 struct Curl_easy *data = conn->data;
1556 const char *cafile = SSL_CONN_CONFIG(CAfile);
1557 const char *capath = SSL_CONN_CONFIG(CApath);
1558 bool use_trust_module;
1559 CURLcode result = CURLE_OK;
1561 /* treat empty string as unset */
1562 if(cafile && !cafile[0])
1564 if(capath && !capath[0])
1567 infof(data, " CAfile: %s\n CApath: %s\n",
1568 cafile ? cafile : "none",
1569 capath ? capath : "none");
1571 /* load libnssckbi.so if no other trust roots were specified */
1572 use_trust_module = !cafile && !capath;
1574 PR_Lock(nss_trustload_lock);
1575 if(use_trust_module && !trust_module) {
1576 /* libnssckbi.so needed but not yet loaded --> load it! */
1577 result = nss_load_module(&trust_module, trust_library, "trust");
1578 infof(data, "%s %s\n", (result) ? "failed to load" : "loaded",
1580 if(result == CURLE_FAILED_INIT)
1581 /* make the error non-fatal if we are not going to verify peer */
1582 result = CURLE_SSL_CACERT_BADFILE;
1584 else if(!use_trust_module && trust_module) {
1585 /* libnssckbi.so not needed but already loaded --> unload it! */
1586 infof(data, "unloading %s\n", trust_library);
1587 nss_unload_module(&trust_module);
1589 PR_Unlock(nss_trustload_lock);
1592 result = nss_load_cert(&conn->ssl[sockindex], cafile, PR_TRUE);
1599 if(stat(capath, &st) == -1)
1600 return CURLE_SSL_CACERT_BADFILE;
1602 if(S_ISDIR(st.st_mode)) {
1604 PRDir *dir = PR_OpenDir(capath);
1606 return CURLE_SSL_CACERT_BADFILE;
1608 while((entry = PR_ReadDir(dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN))) {
1609 char *fullpath = aprintf("%s/%s", capath, entry->name);
1612 return CURLE_OUT_OF_MEMORY;
1615 if(CURLE_OK != nss_load_cert(&conn->ssl[sockindex], fullpath, PR_TRUE))
1616 /* This is purposefully tolerant of errors so non-PEM files can
1617 * be in the same directory */
1618 infof(data, "failed to load '%s' from CURLOPT_CAPATH\n", fullpath);
1626 infof(data, "warning: CURLOPT_CAPATH not a directory (%s)\n", capath);
1632 static CURLcode nss_sslver_from_curl(PRUint16 *nssver, long version)
1635 case CURL_SSLVERSION_TLSv1:
1636 /* TODO: set sslver->max to SSL_LIBRARY_VERSION_TLS_1_3 once stable */
1637 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1638 *nssver = SSL_LIBRARY_VERSION_TLS_1_2;
1639 #elif defined SSL_LIBRARY_VERSION_TLS_1_1
1640 *nssver = SSL_LIBRARY_VERSION_TLS_1_1;
1642 *nssver = SSL_LIBRARY_VERSION_TLS_1_0;
1646 case CURL_SSLVERSION_SSLv2:
1647 *nssver = SSL_LIBRARY_VERSION_2;
1650 case CURL_SSLVERSION_SSLv3:
1651 *nssver = SSL_LIBRARY_VERSION_3_0;
1654 case CURL_SSLVERSION_TLSv1_0:
1655 *nssver = SSL_LIBRARY_VERSION_TLS_1_0;
1658 case CURL_SSLVERSION_TLSv1_1:
1659 #ifdef SSL_LIBRARY_VERSION_TLS_1_1
1660 *nssver = SSL_LIBRARY_VERSION_TLS_1_1;
1663 return CURLE_SSL_CONNECT_ERROR;
1666 case CURL_SSLVERSION_TLSv1_2:
1667 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1668 *nssver = SSL_LIBRARY_VERSION_TLS_1_2;
1671 return CURLE_SSL_CONNECT_ERROR;
1674 case CURL_SSLVERSION_TLSv1_3:
1675 #ifdef SSL_LIBRARY_VERSION_TLS_1_3
1676 *nssver = SSL_LIBRARY_VERSION_TLS_1_3;
1679 return CURLE_SSL_CONNECT_ERROR;
1683 return CURLE_SSL_CONNECT_ERROR;
1687 static CURLcode nss_init_sslver(SSLVersionRange *sslver,
1688 struct Curl_easy *data,
1689 struct connectdata *conn)
1692 const long min = SSL_CONN_CONFIG(version);
1693 const long max = SSL_CONN_CONFIG(version_max);
1695 /* map CURL_SSLVERSION_DEFAULT to NSS default */
1696 if(min == CURL_SSLVERSION_DEFAULT || max == CURL_SSLVERSION_MAX_DEFAULT) {
1697 /* map CURL_SSLVERSION_DEFAULT to NSS default */
1698 if(SSL_VersionRangeGetDefault(ssl_variant_stream, sslver) != SECSuccess)
1699 return CURLE_SSL_CONNECT_ERROR;
1700 /* ... but make sure we use at least TLSv1.0 according to libcurl API */
1701 if(sslver->min < SSL_LIBRARY_VERSION_TLS_1_0)
1702 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1706 case CURL_SSLVERSION_DEFAULT:
1708 case CURL_SSLVERSION_TLSv1:
1709 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1712 result = nss_sslver_from_curl(&sslver->min, min);
1714 failf(data, "unsupported min version passed via CURLOPT_SSLVERSION");
1717 if(max == CURL_SSLVERSION_MAX_NONE)
1718 sslver->max = sslver->min;
1722 case CURL_SSLVERSION_MAX_NONE:
1723 case CURL_SSLVERSION_MAX_DEFAULT:
1726 result = nss_sslver_from_curl(&sslver->max, max >> 16);
1728 failf(data, "unsupported max version passed via CURLOPT_SSLVERSION");
1736 static CURLcode nss_fail_connect(struct ssl_connect_data *connssl,
1737 struct Curl_easy *data,
1740 PRErrorCode err = 0;
1742 if(is_nss_error(curlerr)) {
1743 /* read NSPR error code */
1744 err = PR_GetError();
1745 if(is_cc_error(err))
1746 curlerr = CURLE_SSL_CERTPROBLEM;
1748 /* print the error number and error string */
1749 infof(data, "NSS error %d (%s)\n", err, nss_error_to_name(err));
1751 /* print a human-readable message describing the error if available */
1752 nss_print_error_message(data, err);
1755 /* cleanup on connection failure */
1756 Curl_llist_destroy(&BACKEND->obj_list, NULL);
1761 /* Switch the SSL socket into blocking or non-blocking mode. */
1762 static CURLcode nss_set_blocking(struct ssl_connect_data *connssl,
1763 struct Curl_easy *data,
1766 static PRSocketOptionData sock_opt;
1767 sock_opt.option = PR_SockOpt_Nonblocking;
1768 sock_opt.value.non_blocking = !blocking;
1770 if(PR_SetSocketOption(BACKEND->handle, &sock_opt) != PR_SUCCESS)
1771 return nss_fail_connect(connssl, data, CURLE_SSL_CONNECT_ERROR);
1776 static CURLcode nss_setup_connect(struct connectdata *conn, int sockindex)
1778 PRFileDesc *model = NULL;
1779 PRFileDesc *nspr_io = NULL;
1780 PRFileDesc *nspr_io_stub = NULL;
1781 PRBool ssl_no_cache;
1782 PRBool ssl_cbc_random_iv;
1783 struct Curl_easy *data = conn->data;
1784 curl_socket_t sockfd = conn->sock[sockindex];
1785 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1787 bool second_layer = FALSE;
1789 SSLVersionRange sslver = {
1790 SSL_LIBRARY_VERSION_TLS_1_0, /* min */
1791 SSL_LIBRARY_VERSION_TLS_1_0 /* max */
1794 BACKEND->data = data;
1796 /* list of all NSS objects we need to destroy in Curl_nss_close() */
1797 Curl_llist_init(&BACKEND->obj_list, nss_destroy_object);
1799 /* FIXME. NSS doesn't support multiple databases open at the same time. */
1800 PR_Lock(nss_initlock);
1801 result = nss_init(conn->data);
1803 PR_Unlock(nss_initlock);
1807 PK11_SetPasswordFunc(nss_get_password);
1809 result = nss_load_module(&pem_module, pem_library, "PEM");
1810 PR_Unlock(nss_initlock);
1811 if(result == CURLE_FAILED_INIT)
1812 infof(data, "WARNING: failed to load NSS PEM library %s. Using "
1813 "OpenSSL PEM certificates will not work.\n", pem_library);
1817 result = CURLE_SSL_CONNECT_ERROR;
1819 model = PR_NewTCPSocket();
1822 model = SSL_ImportFD(NULL, model);
1824 if(SSL_OptionSet(model, SSL_SECURITY, PR_TRUE) != SECSuccess)
1826 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_SERVER, PR_FALSE) != SECSuccess)
1828 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE) != SECSuccess)
1831 /* do not use SSL cache if disabled or we are not going to verify peer */
1832 ssl_no_cache = (SSL_SET_OPTION(primary.sessionid)
1833 && SSL_CONN_CONFIG(verifypeer)) ? PR_FALSE : PR_TRUE;
1834 if(SSL_OptionSet(model, SSL_NO_CACHE, ssl_no_cache) != SECSuccess)
1837 /* enable/disable the requested SSL version(s) */
1838 if(nss_init_sslver(&sslver, data, conn) != CURLE_OK)
1840 if(SSL_VersionRangeSet(model, &sslver) != SECSuccess)
1843 ssl_cbc_random_iv = !SSL_SET_OPTION(enable_beast);
1844 #ifdef SSL_CBC_RANDOM_IV
1845 /* unless the user explicitly asks to allow the protocol vulnerability, we
1846 use the work-around */
1847 if(SSL_OptionSet(model, SSL_CBC_RANDOM_IV, ssl_cbc_random_iv) != SECSuccess)
1848 infof(data, "warning: failed to set SSL_CBC_RANDOM_IV = %d\n",
1851 if(ssl_cbc_random_iv)
1852 infof(data, "warning: support for SSL_CBC_RANDOM_IV not compiled in\n");
1855 if(SSL_CONN_CONFIG(cipher_list)) {
1856 if(set_ciphers(data, model, SSL_CONN_CONFIG(cipher_list)) != SECSuccess) {
1857 result = CURLE_SSL_CIPHER;
1862 if(!SSL_CONN_CONFIG(verifypeer) && SSL_CONN_CONFIG(verifyhost))
1863 infof(data, "warning: ignoring value of ssl.verifyhost\n");
1865 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
1867 if(SSL_AuthCertificateHook(model, nss_auth_cert_hook, conn) != SECSuccess)
1870 /* not checked yet */
1872 data->set.proxy_ssl.certverifyresult = 0;
1874 data->set.ssl.certverifyresult = 0;
1876 if(SSL_BadCertHook(model, BadCertHandler, conn) != SECSuccess)
1879 if(SSL_HandshakeCallback(model, HandshakeCallback, conn) != SECSuccess)
1883 const CURLcode rv = nss_load_ca_certificates(conn, sockindex);
1884 if((rv == CURLE_SSL_CACERT_BADFILE) && !SSL_CONN_CONFIG(verifypeer))
1885 /* not a fatal error because we are not going to verify the peer */
1886 infof(data, "warning: CA certificates failed to load\n");
1893 if(SSL_SET_OPTION(CRLfile)) {
1894 const CURLcode rv = nss_load_crl(SSL_SET_OPTION(CRLfile));
1899 infof(data, " CRLfile: %s\n", SSL_SET_OPTION(CRLfile));
1902 if(SSL_SET_OPTION(cert)) {
1903 char *nickname = dup_nickname(data, SSL_SET_OPTION(cert));
1905 /* we are not going to use libnsspem.so to read the client cert */
1906 BACKEND->obj_clicert = NULL;
1909 CURLcode rv = cert_stuff(conn, sockindex, SSL_SET_OPTION(cert),
1910 SSL_SET_OPTION(key));
1912 /* failf() is already done in cert_stuff() */
1918 /* store the nickname for SelectClientCert() called during handshake */
1919 BACKEND->client_nickname = nickname;
1922 BACKEND->client_nickname = NULL;
1924 if(SSL_GetClientAuthDataHook(model, SelectClientCert,
1925 (void *)connssl) != SECSuccess) {
1926 result = CURLE_SSL_CERTPROBLEM;
1930 if(conn->proxy_ssl[sockindex].use) {
1931 DEBUGASSERT(ssl_connection_complete == conn->proxy_ssl[sockindex].state);
1932 DEBUGASSERT(conn->proxy_ssl[sockindex].backend->handle != NULL);
1933 nspr_io = conn->proxy_ssl[sockindex].backend->handle;
1934 second_layer = TRUE;
1937 /* wrap OS file descriptor by NSPR's file descriptor abstraction */
1938 nspr_io = PR_ImportTCPSocket(sockfd);
1943 /* create our own NSPR I/O layer */
1944 nspr_io_stub = PR_CreateIOLayerStub(nspr_io_identity, &nspr_io_methods);
1951 /* make the per-connection data accessible from NSPR I/O callbacks */
1952 nspr_io_stub->secret = (void *)connssl;
1954 /* push our new layer to the NSPR I/O stack */
1955 if(PR_PushIOLayer(nspr_io, PR_TOP_IO_LAYER, nspr_io_stub) != PR_SUCCESS) {
1958 PR_Close(nspr_io_stub);
1962 /* import our model socket onto the current I/O stack */
1963 BACKEND->handle = SSL_ImportFD(model, nspr_io);
1964 if(!BACKEND->handle) {
1970 PR_Close(model); /* We don't need this any more */
1973 /* This is the password associated with the cert that we're using */
1974 if(SSL_SET_OPTION(key_passwd)) {
1975 SSL_SetPKCS11PinArg(BACKEND->handle, SSL_SET_OPTION(key_passwd));
1978 #ifdef SSL_ENABLE_OCSP_STAPLING
1979 if(SSL_CONN_CONFIG(verifystatus)) {
1980 if(SSL_OptionSet(BACKEND->handle, SSL_ENABLE_OCSP_STAPLING, PR_TRUE)
1986 #ifdef SSL_ENABLE_NPN
1987 if(SSL_OptionSet(BACKEND->handle, SSL_ENABLE_NPN, conn->bits.tls_enable_npn
1988 ? PR_TRUE : PR_FALSE) != SECSuccess)
1992 #ifdef SSL_ENABLE_ALPN
1993 if(SSL_OptionSet(BACKEND->handle, SSL_ENABLE_ALPN, conn->bits.tls_enable_alpn
1994 ? PR_TRUE : PR_FALSE) != SECSuccess)
1998 #if NSSVERNUM >= 0x030f04 /* 3.15.4 */
1999 if(data->set.ssl.falsestart) {
2000 if(SSL_OptionSet(BACKEND->handle, SSL_ENABLE_FALSE_START, PR_TRUE)
2004 if(SSL_SetCanFalseStartCallback(BACKEND->handle, CanFalseStartCallback,
2005 conn) != SECSuccess)
2010 #if defined(SSL_ENABLE_NPN) || defined(SSL_ENABLE_ALPN)
2011 if(conn->bits.tls_enable_npn || conn->bits.tls_enable_alpn) {
2013 unsigned char protocols[128];
2016 if(data->set.httpversion >= CURL_HTTP_VERSION_2 &&
2017 (!SSL_IS_PROXY() || !conn->bits.tunnel_proxy)) {
2018 protocols[cur++] = NGHTTP2_PROTO_VERSION_ID_LEN;
2019 memcpy(&protocols[cur], NGHTTP2_PROTO_VERSION_ID,
2020 NGHTTP2_PROTO_VERSION_ID_LEN);
2021 cur += NGHTTP2_PROTO_VERSION_ID_LEN;
2024 protocols[cur++] = ALPN_HTTP_1_1_LENGTH;
2025 memcpy(&protocols[cur], ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH);
2026 cur += ALPN_HTTP_1_1_LENGTH;
2028 if(SSL_SetNextProtoNego(BACKEND->handle, protocols, cur) != SECSuccess)
2034 /* Force handshake on next I/O */
2035 if(SSL_ResetHandshake(BACKEND->handle, /* asServer */ PR_FALSE)
2039 /* propagate hostname to the TLS layer */
2040 if(SSL_SetURL(BACKEND->handle, SSL_IS_PROXY() ? conn->http_proxy.host.name :
2041 conn->host.name) != SECSuccess)
2044 /* prevent NSS from re-using the session for a different hostname */
2045 if(SSL_SetSockPeerID(BACKEND->handle, SSL_IS_PROXY() ?
2046 conn->http_proxy.host.name : conn->host.name)
2056 return nss_fail_connect(connssl, data, result);
2059 static CURLcode nss_do_connect(struct connectdata *conn, int sockindex)
2061 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
2062 struct Curl_easy *data = conn->data;
2063 CURLcode result = CURLE_SSL_CONNECT_ERROR;
2065 long * const certverifyresult = SSL_IS_PROXY() ?
2066 &data->set.proxy_ssl.certverifyresult : &data->set.ssl.certverifyresult;
2067 const char * const pinnedpubkey = SSL_IS_PROXY() ?
2068 data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY] :
2069 data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG];
2072 /* check timeout situation */
2073 const time_t time_left = Curl_timeleft(data, NULL, TRUE);
2075 failf(data, "timed out before SSL handshake");
2076 result = CURLE_OPERATION_TIMEDOUT;
2080 /* Force the handshake now */
2081 timeout = PR_MillisecondsToInterval((PRUint32) time_left);
2082 if(SSL_ForceHandshakeWithTimeout(BACKEND->handle, timeout) != SECSuccess) {
2083 if(PR_GetError() == PR_WOULD_BLOCK_ERROR)
2084 /* blocking direction is updated by nss_update_connecting_state() */
2086 else if(*certverifyresult == SSL_ERROR_BAD_CERT_DOMAIN)
2087 result = CURLE_PEER_FAILED_VERIFICATION;
2088 else if(*certverifyresult != 0)
2089 result = CURLE_SSL_CACERT;
2093 result = display_conn_info(conn, BACKEND->handle);
2097 if(SSL_SET_OPTION(issuercert)) {
2098 SECStatus ret = SECFailure;
2099 char *nickname = dup_nickname(data, SSL_SET_OPTION(issuercert));
2101 /* we support only nicknames in case of issuercert for now */
2102 ret = check_issuer_cert(BACKEND->handle, nickname);
2106 if(SECFailure == ret) {
2107 infof(data, "SSL certificate issuer check failed\n");
2108 result = CURLE_SSL_ISSUER_ERROR;
2112 infof(data, "SSL certificate issuer check ok\n");
2116 result = cmp_peer_pubkey(connssl, pinnedpubkey);
2118 /* status already printed */
2124 return nss_fail_connect(connssl, data, result);
2127 static CURLcode nss_connect_common(struct connectdata *conn, int sockindex,
2130 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
2131 struct Curl_easy *data = conn->data;
2132 const bool blocking = (done == NULL);
2135 if(connssl->state == ssl_connection_complete) {
2141 if(connssl->connecting_state == ssl_connect_1) {
2142 result = nss_setup_connect(conn, sockindex);
2144 /* we do not expect CURLE_AGAIN from nss_setup_connect() */
2147 connssl->connecting_state = ssl_connect_2;
2150 /* enable/disable blocking mode before handshake */
2151 result = nss_set_blocking(connssl, data, blocking);
2155 result = nss_do_connect(conn, sockindex);
2161 /* CURLE_AGAIN in non-blocking mode is not an error */
2169 /* in blocking mode, set NSS non-blocking mode _after_ SSL handshake */
2170 result = nss_set_blocking(connssl, data, /* blocking */ FALSE);
2175 /* signal completed SSL handshake */
2178 connssl->state = ssl_connection_complete;
2179 conn->recv[sockindex] = nss_recv;
2180 conn->send[sockindex] = nss_send;
2182 /* ssl_connect_done is never used outside, go back to the initial state */
2183 connssl->connecting_state = ssl_connect_1;
2188 static CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex)
2190 return nss_connect_common(conn, sockindex, /* blocking */ NULL);
2193 static CURLcode Curl_nss_connect_nonblocking(struct connectdata *conn,
2194 int sockindex, bool *done)
2196 return nss_connect_common(conn, sockindex, done);
2199 static ssize_t nss_send(struct connectdata *conn, /* connection data */
2200 int sockindex, /* socketindex */
2201 const void *mem, /* send this data */
2202 size_t len, /* amount to write */
2205 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
2208 /* The SelectClientCert() hook uses this for infof() and failf() but the
2209 handle stored in nss_setup_connect() could have already been freed. */
2210 BACKEND->data = conn->data;
2212 rc = PR_Send(BACKEND->handle, mem, (int)len, 0, PR_INTERVAL_NO_WAIT);
2214 PRInt32 err = PR_GetError();
2215 if(err == PR_WOULD_BLOCK_ERROR)
2216 *curlcode = CURLE_AGAIN;
2218 /* print the error number and error string */
2219 const char *err_name = nss_error_to_name(err);
2220 infof(conn->data, "SSL write: error %d (%s)\n", err, err_name);
2222 /* print a human-readable message describing the error if available */
2223 nss_print_error_message(conn->data, err);
2225 *curlcode = (is_cc_error(err))
2226 ? CURLE_SSL_CERTPROBLEM
2233 return rc; /* number of bytes */
2236 static ssize_t nss_recv(struct connectdata *conn, /* connection data */
2237 int sockindex, /* socketindex */
2238 char *buf, /* store read data here */
2239 size_t buffersize, /* max amount to read */
2242 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
2245 /* The SelectClientCert() hook uses this for infof() and failf() but the
2246 handle stored in nss_setup_connect() could have already been freed. */
2247 BACKEND->data = conn->data;
2249 nread = PR_Recv(BACKEND->handle, buf, (int)buffersize, 0,
2250 PR_INTERVAL_NO_WAIT);
2252 /* failed SSL read */
2253 PRInt32 err = PR_GetError();
2255 if(err == PR_WOULD_BLOCK_ERROR)
2256 *curlcode = CURLE_AGAIN;
2258 /* print the error number and error string */
2259 const char *err_name = nss_error_to_name(err);
2260 infof(conn->data, "SSL read: errno %d (%s)\n", err, err_name);
2262 /* print a human-readable message describing the error if available */
2263 nss_print_error_message(conn->data, err);
2265 *curlcode = (is_cc_error(err))
2266 ? CURLE_SSL_CERTPROBLEM
2276 static size_t Curl_nss_version(char *buffer, size_t size)
2278 return snprintf(buffer, size, "NSS/%s", NSS_VERSION);
2281 /* data might be NULL */
2282 static int Curl_nss_seed(struct Curl_easy *data)
2284 /* make sure that NSS is initialized */
2285 return !!Curl_nss_force_init(data);
2288 /* data might be NULL */
2289 static CURLcode Curl_nss_random(struct Curl_easy *data,
2290 unsigned char *entropy,
2293 Curl_nss_seed(data); /* Initiate the seed if not already done */
2295 if(SECSuccess != PK11_GenerateRandom(entropy, curlx_uztosi(length)))
2296 /* signal a failure */
2297 return CURLE_FAILED_INIT;
2302 static CURLcode Curl_nss_md5sum(unsigned char *tmp, /* input */
2304 unsigned char *md5sum, /* output */
2307 PK11Context *MD5pw = PK11_CreateDigestContext(SEC_OID_MD5);
2308 unsigned int MD5out;
2310 PK11_DigestOp(MD5pw, tmp, curlx_uztoui(tmplen));
2311 PK11_DigestFinal(MD5pw, md5sum, &MD5out, curlx_uztoui(md5len));
2312 PK11_DestroyContext(MD5pw, PR_TRUE);
2317 static void Curl_nss_sha256sum(const unsigned char *tmp, /* input */
2319 unsigned char *sha256sum, /* output */
2322 PK11Context *SHA256pw = PK11_CreateDigestContext(SEC_OID_SHA256);
2323 unsigned int SHA256out;
2325 PK11_DigestOp(SHA256pw, tmp, curlx_uztoui(tmplen));
2326 PK11_DigestFinal(SHA256pw, sha256sum, &SHA256out, curlx_uztoui(sha256len));
2327 PK11_DestroyContext(SHA256pw, PR_TRUE);
2330 static bool Curl_nss_cert_status_request(void)
2332 #ifdef SSL_ENABLE_OCSP_STAPLING
2339 static bool Curl_nss_false_start(void)
2341 #if NSSVERNUM >= 0x030f04 /* 3.15.4 */
2348 static void *Curl_nss_get_internals(struct ssl_connect_data *connssl,
2349 CURLINFO info UNUSED_PARAM)
2352 return BACKEND->handle;
2355 const struct Curl_ssl Curl_ssl_nss = {
2356 { CURLSSLBACKEND_NSS, "nss" }, /* info */
2358 1, /* have_ca_path */
2359 1, /* have_certinfo */
2360 1, /* have_pinnedpubkey */
2361 0, /* have_ssl_ctx */
2362 1, /* support_https_proxy */
2364 sizeof(struct ssl_backend_data),
2366 Curl_nss_init, /* init */
2367 Curl_nss_cleanup, /* cleanup */
2368 Curl_nss_version, /* version */
2369 Curl_nss_check_cxn, /* check_cxn */
2370 /* NSS has no shutdown function provided and thus always fail */
2371 Curl_none_shutdown, /* shutdown */
2372 Curl_none_data_pending, /* data_pending */
2373 Curl_nss_random, /* random */
2374 Curl_nss_cert_status_request, /* cert_status_request */
2375 Curl_nss_connect, /* connect */
2376 Curl_nss_connect_nonblocking, /* connect_nonblocking */
2377 Curl_nss_get_internals, /* get_internals */
2378 Curl_nss_close, /* close_one */
2379 Curl_none_close_all, /* close_all */
2380 /* NSS has its own session ID cache */
2381 Curl_none_session_free, /* session_free */
2382 Curl_none_set_engine, /* set_engine */
2383 Curl_none_set_engine_default, /* set_engine_default */
2384 Curl_none_engines_list, /* engines_list */
2385 Curl_nss_false_start, /* false_start */
2386 Curl_nss_md5sum, /* md5sum */
2387 Curl_nss_sha256sum /* sha256sum */
2390 #endif /* USE_NSS */