1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2013, 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 sslgen.c should ever call or use these functions.
28 #include "curl_setup.h"
34 #include "formdata.h" /* for the boundary function */
35 #include "url.h" /* for the ssl config check function */
42 #define _MPRINTF_REPLACE /* use the internal *printf() functions */
43 #include <curl/mprintf.h>
63 #include "curl_memory.h"
68 /* The last #include file should be: */
71 #define SSL_DIR "/etc/pki/nssdb"
73 /* enough to fit the string "PEM Token #[0|1]" */
76 PRFileDesc *PR_ImportTCPSocket(PRInt32 osfd);
78 PRLock * nss_initlock = NULL;
79 PRLock * nss_crllock = NULL;
80 NSSInitContext * nss_context = NULL;
82 volatile int initialized = 0;
89 #define PK11_SETATTRS(_attr, _idx, _type, _val, _len) do { \
90 CK_ATTRIBUTE *ptr = (_attr) + ((_idx)++); \
91 ptr->type = (_type); \
92 ptr->pValue = (_val); \
93 ptr->ulValueLen = (_len); \
96 #define CERT_NewTempCertificate __CERT_NewTempCertificate
98 #define NUM_OF_CIPHERS sizeof(cipherlist)/sizeof(cipherlist[0])
99 static const cipher_s cipherlist[] = {
100 /* SSL2 cipher suites */
101 {"rc4", SSL_EN_RC4_128_WITH_MD5},
102 {"rc4-md5", SSL_EN_RC4_128_WITH_MD5},
103 {"rc4export", SSL_EN_RC4_128_EXPORT40_WITH_MD5},
104 {"rc2", SSL_EN_RC2_128_CBC_WITH_MD5},
105 {"rc2export", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5},
106 {"des", SSL_EN_DES_64_CBC_WITH_MD5},
107 {"desede3", SSL_EN_DES_192_EDE3_CBC_WITH_MD5},
108 /* SSL3/TLS cipher suites */
109 {"rsa_rc4_128_md5", SSL_RSA_WITH_RC4_128_MD5},
110 {"rsa_rc4_128_sha", SSL_RSA_WITH_RC4_128_SHA},
111 {"rsa_3des_sha", SSL_RSA_WITH_3DES_EDE_CBC_SHA},
112 {"rsa_des_sha", SSL_RSA_WITH_DES_CBC_SHA},
113 {"rsa_rc4_40_md5", SSL_RSA_EXPORT_WITH_RC4_40_MD5},
114 {"rsa_rc2_40_md5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5},
115 {"rsa_null_md5", SSL_RSA_WITH_NULL_MD5},
116 {"rsa_null_sha", SSL_RSA_WITH_NULL_SHA},
117 {"fips_3des_sha", SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA},
118 {"fips_des_sha", SSL_RSA_FIPS_WITH_DES_CBC_SHA},
119 {"fortezza", SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA},
120 {"fortezza_rc4_128_sha", SSL_FORTEZZA_DMS_WITH_RC4_128_SHA},
121 {"fortezza_null", SSL_FORTEZZA_DMS_WITH_NULL_SHA},
122 /* TLS 1.0: Exportable 56-bit Cipher Suites. */
123 {"rsa_des_56_sha", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA},
124 {"rsa_rc4_56_sha", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA},
126 {"rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA},
127 {"rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA},
128 #ifdef NSS_ENABLE_ECC
130 {"ecdh_ecdsa_null_sha", TLS_ECDH_ECDSA_WITH_NULL_SHA},
131 {"ecdh_ecdsa_rc4_128_sha", TLS_ECDH_ECDSA_WITH_RC4_128_SHA},
132 {"ecdh_ecdsa_3des_sha", TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA},
133 {"ecdh_ecdsa_aes_128_sha", TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA},
134 {"ecdh_ecdsa_aes_256_sha", TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA},
135 {"ecdhe_ecdsa_null_sha", TLS_ECDHE_ECDSA_WITH_NULL_SHA},
136 {"ecdhe_ecdsa_rc4_128_sha", TLS_ECDHE_ECDSA_WITH_RC4_128_SHA},
137 {"ecdhe_ecdsa_3des_sha", TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA},
138 {"ecdhe_ecdsa_aes_128_sha", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA},
139 {"ecdhe_ecdsa_aes_256_sha", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA},
140 {"ecdh_rsa_null_sha", TLS_ECDH_RSA_WITH_NULL_SHA},
141 {"ecdh_rsa_128_sha", TLS_ECDH_RSA_WITH_RC4_128_SHA},
142 {"ecdh_rsa_3des_sha", TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA},
143 {"ecdh_rsa_aes_128_sha", TLS_ECDH_RSA_WITH_AES_128_CBC_SHA},
144 {"ecdh_rsa_aes_256_sha", TLS_ECDH_RSA_WITH_AES_256_CBC_SHA},
145 {"echde_rsa_null", TLS_ECDHE_RSA_WITH_NULL_SHA},
146 {"ecdhe_rsa_rc4_128_sha", TLS_ECDHE_RSA_WITH_RC4_128_SHA},
147 {"ecdhe_rsa_3des_sha", TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA},
148 {"ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
149 {"ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA},
150 {"ecdh_anon_null_sha", TLS_ECDH_anon_WITH_NULL_SHA},
151 {"ecdh_anon_rc4_128sha", TLS_ECDH_anon_WITH_RC4_128_SHA},
152 {"ecdh_anon_3des_sha", TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA},
153 {"ecdh_anon_aes_128_sha", TLS_ECDH_anon_WITH_AES_128_CBC_SHA},
154 {"ecdh_anon_aes_256_sha", TLS_ECDH_anon_WITH_AES_256_CBC_SHA},
158 /* following ciphers are new in NSS 3.4 and not enabled by default, therefore
159 they are enabled explicitly */
160 static const int enable_ciphers_by_default[] = {
161 TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
162 TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
163 TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
164 TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
165 TLS_RSA_WITH_AES_128_CBC_SHA,
166 TLS_RSA_WITH_AES_256_CBC_SHA,
167 SSL_NULL_WITH_NULL_NULL
170 static const char* pem_library = "libnsspem.so";
171 SECMODModule* mod = NULL;
173 static const char* nss_error_to_name(PRErrorCode code)
175 const char *name = PR_ErrorToName(code);
179 return "unknown error";
182 static void nss_print_error_message(struct SessionHandle *data, PRUint32 err)
184 failf(data, "%s", PR_ErrorToString(err, PR_LANGUAGE_I_DEFAULT));
187 static SECStatus set_ciphers(struct SessionHandle *data, PRFileDesc * model,
191 PRBool cipher_state[NUM_OF_CIPHERS];
196 /* First disable all ciphers. This uses a different max value in case
197 * NSS adds more ciphers later we don't want them available by
200 for(i=0; i<SSL_NumImplementedCiphers; i++) {
201 SSL_CipherPrefSet(model, SSL_ImplementedCiphers[i], SSL_NOT_ALLOWED);
204 /* Set every entry in our list to false */
205 for(i=0; i<NUM_OF_CIPHERS; i++) {
206 cipher_state[i] = PR_FALSE;
209 cipher = cipher_list;
211 while(cipher_list && (cipher_list[0])) {
212 while((*cipher) && (ISSPACE(*cipher)))
215 if((cipher_list = strchr(cipher, ','))) {
216 *cipher_list++ = '\0';
221 for(i=0; i<NUM_OF_CIPHERS; i++) {
222 if(Curl_raw_equal(cipher, cipherlist[i].name)) {
223 cipher_state[i] = PR_TRUE;
229 if(found == PR_FALSE) {
230 failf(data, "Unknown cipher in list: %s", cipher);
235 cipher = cipher_list;
239 /* Finally actually enable the selected ciphers */
240 for(i=0; i<NUM_OF_CIPHERS; i++) {
241 rv = SSL_CipherPrefSet(model, cipherlist[i].num, cipher_state[i]);
242 if(rv != SECSuccess) {
243 failf(data, "cipher-suite not supported by NSS: %s", cipherlist[i].name);
252 * Get the number of ciphers that are enabled. We use this to determine
253 * if we need to call NSS_SetDomesticPolicy() to enable the default ciphers.
255 static int num_enabled_ciphers(void)
261 for(i=0; i<NUM_OF_CIPHERS; i++) {
262 SSL_CipherPolicyGet(cipherlist[i].num, &policy);
270 * Determine whether the nickname passed in is a filename that needs to
271 * be loaded as a PEM or a regular NSS nickname.
273 * returns 1 for a file
274 * returns 0 for not a file (NSS nickname)
276 static int is_file(const char *filename)
283 if(stat(filename, &st) == 0)
284 if(S_ISREG(st.st_mode))
290 /* Check if the given string is filename or nickname of a certificate. If the
291 * given string is recognized as filename, return NULL. If the given string is
292 * recognized as nickname, return a duplicated string. The returned string
293 * should be later deallocated using free(). If the OOM failure occurs, we
296 static char* dup_nickname(struct SessionHandle *data, enum dupstring cert_kind)
298 const char *str = data->set.str[cert_kind];
302 /* no such file exists, use the string as nickname */
305 /* search the last slash; we require at least one slash in a file name */
306 n = strrchr(str, '/');
308 infof(data, "warning: certificate file name \"%s\" handled as nickname; "
309 "please use \"./%s\" to force file name\n", str, str);
313 /* we'll use the PEM reader to read the certificate from file */
317 /* Call PK11_CreateGenericObject() with the given obj_class and filename. If
318 * the call succeeds, append the object handle to the list of objects so that
319 * the object can be destroyed in Curl_nss_close(). */
320 static CURLcode nss_create_object(struct ssl_connect_data *ssl,
321 CK_OBJECT_CLASS obj_class,
322 const char *filename, bool cacert)
325 PK11GenericObject *obj;
326 CK_BBOOL cktrue = CK_TRUE;
327 CK_BBOOL ckfalse = CK_FALSE;
328 CK_ATTRIBUTE attrs[/* max count of attributes */ 4];
330 CURLcode err = (cacert)
331 ? CURLE_SSL_CACERT_BADFILE
332 : CURLE_SSL_CERTPROBLEM;
334 const int slot_id = (cacert) ? 0 : 1;
335 char *slot_name = aprintf("PEM Token #%d", slot_id);
337 return CURLE_OUT_OF_MEMORY;
339 slot = PK11_FindSlotByName(slot_name);
344 PK11_SETATTRS(attrs, attr_cnt, CKA_CLASS, &obj_class, sizeof(obj_class));
345 PK11_SETATTRS(attrs, attr_cnt, CKA_TOKEN, &cktrue, sizeof(CK_BBOOL));
346 PK11_SETATTRS(attrs, attr_cnt, CKA_LABEL, (unsigned char *)filename,
347 strlen(filename) + 1);
349 if(CKO_CERTIFICATE == obj_class) {
350 CK_BBOOL *pval = (cacert) ? (&cktrue) : (&ckfalse);
351 PK11_SETATTRS(attrs, attr_cnt, CKA_TRUST, pval, sizeof(*pval));
354 obj = PK11_CreateGenericObject(slot, attrs, attr_cnt, PR_FALSE);
359 if(!Curl_llist_insert_next(ssl->obj_list, ssl->obj_list->tail, obj)) {
360 PK11_DestroyGenericObject(obj);
361 return CURLE_OUT_OF_MEMORY;
364 if(!cacert && CKO_CERTIFICATE == obj_class)
365 /* store reference to a client certificate */
366 ssl->obj_clicert = obj;
371 /* Destroy the NSS object whose handle is given by ptr. This function is
372 * a callback of Curl_llist_alloc() used by Curl_llist_destroy() to destroy
373 * NSS objects in Curl_nss_close() */
374 static void nss_destroy_object(void *user, void *ptr)
376 PK11GenericObject *obj = (PK11GenericObject *)ptr;
378 PK11_DestroyGenericObject(obj);
381 static CURLcode nss_load_cert(struct ssl_connect_data *ssl,
382 const char *filename, PRBool cacert)
384 CURLcode err = (cacert)
385 ? CURLE_SSL_CACERT_BADFILE
386 : CURLE_SSL_CERTPROBLEM;
388 /* libnsspem.so leaks memory if the requested file does not exist. For more
389 * details, go to <https://bugzilla.redhat.com/734760>. */
390 if(is_file(filename))
391 err = nss_create_object(ssl, CKO_CERTIFICATE, filename, cacert);
393 if(CURLE_OK == err && !cacert) {
394 /* we have successfully loaded a client certificate */
395 CERTCertificate *cert;
396 char *nickname = NULL;
397 char *n = strrchr(filename, '/');
401 /* The following undocumented magic helps to avoid a SIGSEGV on call
402 * of PK11_ReadRawAttribute() from SelectClientCert() when using an
403 * immature version of libnsspem.so. For more details, go to
404 * <https://bugzilla.redhat.com/733685>. */
405 nickname = aprintf("PEM Token #1:%s", n);
407 cert = PK11_FindCertFromNickname(nickname, NULL);
409 CERT_DestroyCertificate(cert);
418 /* add given CRL to cache if it is not already there */
419 static SECStatus nss_cache_crl(SECItem *crlDER)
421 CERTCertDBHandle *db = CERT_GetDefaultCertDB();
422 CERTSignedCrl *crl = SEC_FindCrlByDERCert(db, crlDER, 0);
424 /* CRL already cached */
426 SECITEM_FreeItem(crlDER, PR_FALSE);
430 /* acquire lock before call of CERT_CacheCRL() */
431 PR_Lock(nss_crllock);
432 if(SECSuccess != CERT_CacheCRL(db, crlDER)) {
433 /* unable to cache CRL */
434 PR_Unlock(nss_crllock);
435 SECITEM_FreeItem(crlDER, PR_FALSE);
439 /* we need to clear session cache, so that the CRL could take effect */
440 SSL_ClearSessionCache();
441 PR_Unlock(nss_crllock);
445 static SECStatus nss_load_crl(const char* crlfilename)
449 SECItem filedata = { 0, NULL, 0 };
450 SECItem crlDER = { 0, NULL, 0 };
453 infile = PR_Open(crlfilename, PR_RDONLY, 0);
457 if(PR_SUCCESS != PR_GetOpenFileInfo(infile, &info))
460 if(!SECITEM_AllocItem(NULL, &filedata, info.size + /* zero ended */ 1))
463 if(info.size != PR_Read(infile, filedata.data, info.size))
466 /* place a trailing zero right after the visible data */
467 body = (char*)filedata.data;
468 body[--filedata.len] = '\0';
470 body = strstr(body, "-----BEGIN");
474 char *begin = PORT_Strchr(body, '\n');
476 begin = PORT_Strchr(body, '\r');
480 trailer = strstr(++begin, "-----END");
484 /* retrieve DER from ASCII */
486 if(ATOB_ConvertAsciiToItem(&crlDER, begin))
489 SECITEM_FreeItem(&filedata, PR_FALSE);
496 return nss_cache_crl(&crlDER);
500 SECITEM_FreeItem(&filedata, PR_FALSE);
504 static CURLcode nss_load_key(struct connectdata *conn, int sockindex,
510 struct ssl_connect_data *ssl = conn->ssl;
511 (void)sockindex; /* unused */
513 rv = nss_create_object(ssl, CKO_PRIVATE_KEY, key_file, FALSE);
515 PR_SetError(SEC_ERROR_BAD_KEY, 0);
519 slot = PK11_FindSlotByName("PEM Token #1");
521 return CURLE_SSL_CERTPROBLEM;
523 /* This will force the token to be seen as re-inserted */
524 SECMOD_WaitForAnyTokenEvent(mod, 0, 0);
525 PK11_IsPresent(slot);
527 status = PK11_Authenticate(slot, PR_TRUE,
528 conn->data->set.str[STRING_KEY_PASSWD]);
530 return (SECSuccess == status)
532 : CURLE_SSL_CERTPROBLEM;
535 static int display_error(struct connectdata *conn, PRInt32 err,
536 const char *filename)
539 case SEC_ERROR_BAD_PASSWORD:
540 failf(conn->data, "Unable to load client key: Incorrect password");
542 case SEC_ERROR_UNKNOWN_CERT:
543 failf(conn->data, "Unable to load certificate %s", filename);
548 return 0; /* The caller will print a generic error */
551 static CURLcode cert_stuff(struct connectdata *conn, int sockindex,
552 char *cert_file, char *key_file)
554 struct SessionHandle *data = conn->data;
558 rv = nss_load_cert(&conn->ssl[sockindex], cert_file, PR_FALSE);
560 const PRErrorCode err = PR_GetError();
561 if(!display_error(conn, err, cert_file)) {
562 const char *err_name = nss_error_to_name(err);
563 failf(data, "unable to load client cert: %d (%s)", err, err_name);
570 if(key_file || (is_file(cert_file))) {
572 rv = nss_load_key(conn, sockindex, key_file);
574 /* In case the cert file also has the key */
575 rv = nss_load_key(conn, sockindex, cert_file);
577 const PRErrorCode err = PR_GetError();
578 if(!display_error(conn, err, key_file)) {
579 const char *err_name = nss_error_to_name(err);
580 failf(data, "unable to load client key: %d (%s)", err, err_name);
590 static char * nss_get_password(PK11SlotInfo * slot, PRBool retry, void *arg)
592 (void)slot; /* unused */
593 if(retry || NULL == arg)
596 return (char *)PORT_Strdup((char *)arg);
599 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
601 static SECStatus nss_auth_cert_hook(void *arg, PRFileDesc *fd, PRBool checksig,
604 struct connectdata *conn = (struct connectdata *)arg;
605 if(!conn->data->set.ssl.verifypeer) {
606 infof(conn->data, "skipping SSL peer certificate verification\n");
610 return SSL_AuthCertificate(CERT_GetDefaultCertDB(), fd, checksig, isServer);
614 * Inform the application that the handshake is complete.
616 static void HandshakeCallback(PRFileDesc *sock, void *arg)
622 static void display_cert_info(struct SessionHandle *data,
623 CERTCertificate *cert)
625 char *subject, *issuer, *common_name;
626 PRExplodedTime printableTime;
627 char timeString[256];
628 PRTime notBefore, notAfter;
630 subject = CERT_NameToAscii(&cert->subject);
631 issuer = CERT_NameToAscii(&cert->issuer);
632 common_name = CERT_GetCommonName(&cert->subject);
633 infof(data, "\tsubject: %s\n", subject);
635 CERT_GetCertTimes(cert, ¬Before, ¬After);
636 PR_ExplodeTime(notBefore, PR_GMTParameters, &printableTime);
637 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
638 infof(data, "\tstart date: %s\n", timeString);
639 PR_ExplodeTime(notAfter, PR_GMTParameters, &printableTime);
640 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
641 infof(data, "\texpire date: %s\n", timeString);
642 infof(data, "\tcommon name: %s\n", common_name);
643 infof(data, "\tissuer: %s\n", issuer);
647 PR_Free(common_name);
650 static void display_conn_info(struct connectdata *conn, PRFileDesc *sock)
652 SSLChannelInfo channel;
653 SSLCipherSuiteInfo suite;
654 CERTCertificate *cert;
655 CERTCertificate *cert2;
656 CERTCertificate *cert3;
660 if(SSL_GetChannelInfo(sock, &channel, sizeof channel) ==
661 SECSuccess && channel.length == sizeof channel &&
662 channel.cipherSuite) {
663 if(SSL_GetCipherSuiteInfo(channel.cipherSuite,
664 &suite, sizeof suite) == SECSuccess) {
665 infof(conn->data, "SSL connection using %s\n", suite.cipherSuiteName);
669 cert = SSL_PeerCertificate(sock);
672 infof(conn->data, "Server certificate:\n");
674 if(!conn->data->set.ssl.certinfo) {
675 display_cert_info(conn->data, cert);
676 CERT_DestroyCertificate(cert);
679 /* Count certificates in chain. */
683 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
687 CERT_DestroyCertificate(cert2);
690 cert3 = CERT_FindCertIssuer(cert2, now, certUsageSSLCA);
691 CERT_DestroyCertificate(cert2);
695 Curl_ssl_init_certinfo(conn->data, i);
696 for(i = 0; cert; cert = cert2) {
697 Curl_extract_certinfo(conn, i++, (char *)cert->derCert.data,
698 (char *)cert->derCert.data + cert->derCert.len);
700 CERT_DestroyCertificate(cert);
703 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
704 CERT_DestroyCertificate(cert);
712 static SECStatus BadCertHandler(void *arg, PRFileDesc *sock)
714 struct connectdata *conn = (struct connectdata *)arg;
715 struct SessionHandle *data = conn->data;
716 PRErrorCode err = PR_GetError();
717 CERTCertificate *cert;
719 /* remember the cert verification result */
720 data->set.ssl.certverifyresult = err;
722 if(err == SSL_ERROR_BAD_CERT_DOMAIN && !data->set.ssl.verifyhost)
723 /* we are asked not to verify the host name */
726 /* print only info about the cert, the error is printed off the callback */
727 cert = SSL_PeerCertificate(sock);
729 infof(data, "Server certificate:\n");
730 display_cert_info(data, cert);
731 CERT_DestroyCertificate(cert);
739 * Check that the Peer certificate's issuer certificate matches the one found
740 * by issuer_nickname. This is not exactly the way OpenSSL and GNU TLS do the
741 * issuer check, so we provide comments that mimic the OpenSSL
742 * X509_check_issued function (in x509v3/v3_purp.c)
744 static SECStatus check_issuer_cert(PRFileDesc *sock,
745 char *issuer_nickname)
747 CERTCertificate *cert,*cert_issuer,*issuer;
748 SECStatus res=SECSuccess;
749 void *proto_win = NULL;
752 PRArenaPool *tmpArena = NULL;
753 CERTAuthKeyID *authorityKeyID = NULL;
754 SECITEM *caname = NULL;
757 cert = SSL_PeerCertificate(sock);
758 cert_issuer = CERT_FindCertIssuer(cert,PR_Now(),certUsageObjectSigner);
760 proto_win = SSL_RevealPinArg(sock);
761 issuer = PK11_FindCertFromNickname(issuer_nickname, proto_win);
763 if((!cert_issuer) || (!issuer))
765 else if(SECITEM_CompareItem(&cert_issuer->derCert,
766 &issuer->derCert)!=SECEqual)
769 CERT_DestroyCertificate(cert);
770 CERT_DestroyCertificate(issuer);
771 CERT_DestroyCertificate(cert_issuer);
777 * Callback to pick the SSL client certificate.
779 static SECStatus SelectClientCert(void *arg, PRFileDesc *sock,
780 struct CERTDistNamesStr *caNames,
781 struct CERTCertificateStr **pRetCert,
782 struct SECKEYPrivateKeyStr **pRetKey)
784 struct ssl_connect_data *connssl = (struct ssl_connect_data *)arg;
785 struct SessionHandle *data = connssl->data;
786 const char *nickname = connssl->client_nickname;
788 if(connssl->obj_clicert) {
789 /* use the cert/key provided by PEM reader */
790 static const char pem_slotname[] = "PEM Token #1";
791 SECItem cert_der = { 0, NULL, 0 };
792 void *proto_win = SSL_RevealPinArg(sock);
793 struct CERTCertificateStr *cert;
794 struct SECKEYPrivateKeyStr *key;
796 PK11SlotInfo *slot = PK11_FindSlotByName(pem_slotname);
798 failf(data, "NSS: PK11 slot not found: %s", pem_slotname);
802 if(PK11_ReadRawAttribute(PK11_TypeGeneric, connssl->obj_clicert, CKA_VALUE,
803 &cert_der) != SECSuccess) {
804 failf(data, "NSS: CKA_VALUE not found in PK11 generic object");
809 cert = PK11_FindCertFromDERCertItem(slot, &cert_der, proto_win);
810 SECITEM_FreeItem(&cert_der, PR_FALSE);
812 failf(data, "NSS: client certificate from file not found");
817 key = PK11_FindPrivateKeyFromCert(slot, cert, NULL);
820 failf(data, "NSS: private key from file not found");
821 CERT_DestroyCertificate(cert);
825 infof(data, "NSS: client certificate from file\n");
826 display_cert_info(data, cert);
833 /* use the default NSS hook */
834 if(SECSuccess != NSS_GetClientAuthData((void *)nickname, sock, caNames,
836 || NULL == *pRetCert) {
839 failf(data, "NSS: client certificate not found (nickname not "
842 failf(data, "NSS: client certificate not found: %s", nickname);
847 /* get certificate nickname if any */
848 nickname = (*pRetCert)->nickname;
850 nickname = "[unknown]";
852 if(NULL == *pRetKey) {
853 failf(data, "NSS: private key not found for certificate: %s", nickname);
857 infof(data, "NSS: using client certificate: %s\n", nickname);
858 display_cert_info(data, *pRetCert);
862 /* This function is supposed to decide, which error codes should be used
863 * to conclude server is TLS intolerant.
865 * taken from xulrunner - nsNSSIOLayer.cpp
868 isTLSIntoleranceError(PRInt32 err)
871 case SSL_ERROR_BAD_MAC_ALERT:
872 case SSL_ERROR_BAD_MAC_READ:
873 case SSL_ERROR_HANDSHAKE_FAILURE_ALERT:
874 case SSL_ERROR_HANDSHAKE_UNEXPECTED_ALERT:
875 case SSL_ERROR_CLIENT_KEY_EXCHANGE_FAILURE:
876 case SSL_ERROR_ILLEGAL_PARAMETER_ALERT:
877 case SSL_ERROR_NO_CYPHER_OVERLAP:
878 case SSL_ERROR_BAD_SERVER:
879 case SSL_ERROR_BAD_BLOCK_PADDING:
880 case SSL_ERROR_UNSUPPORTED_VERSION:
881 case SSL_ERROR_PROTOCOL_VERSION_ALERT:
882 case SSL_ERROR_RX_MALFORMED_FINISHED:
883 case SSL_ERROR_BAD_HANDSHAKE_HASH_VALUE:
884 case SSL_ERROR_DECODE_ERROR_ALERT:
885 case SSL_ERROR_RX_UNKNOWN_ALERT:
892 static CURLcode nss_init_core(struct SessionHandle *data, const char *cert_dir)
894 NSSInitParameters initparams;
896 if(nss_context != NULL)
899 memset((void *) &initparams, '\0', sizeof(initparams));
900 initparams.length = sizeof(initparams);
903 const bool use_sql = NSS_VersionCheck("3.12.0");
904 char *certpath = aprintf("%s%s", use_sql ? "sql:" : "", cert_dir);
906 return CURLE_OUT_OF_MEMORY;
908 infof(data, "Initializing NSS with certpath: %s\n", certpath);
909 nss_context = NSS_InitContext(certpath, "", "", "", &initparams,
910 NSS_INIT_READONLY | NSS_INIT_PK11RELOAD);
913 if(nss_context != NULL)
916 infof(data, "Unable to initialize NSS database\n");
919 infof(data, "Initializing NSS with certpath: none\n");
920 nss_context = NSS_InitContext("", "", "", "", &initparams, NSS_INIT_READONLY
921 | NSS_INIT_NOCERTDB | NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN
922 | NSS_INIT_NOROOTINIT | NSS_INIT_OPTIMIZESPACE | NSS_INIT_PK11RELOAD);
923 if(nss_context != NULL)
926 infof(data, "Unable to initialize NSS\n");
927 return CURLE_SSL_CACERT_BADFILE;
930 static CURLcode nss_init(struct SessionHandle *data)
939 /* First we check if $SSL_DIR points to a valid dir */
940 cert_dir = getenv("SSL_DIR");
942 if((stat(cert_dir, &st) != 0) ||
943 (!S_ISDIR(st.st_mode))) {
948 /* Now we check if the default location is a valid dir */
950 if((stat(SSL_DIR, &st) == 0) &&
951 (S_ISDIR(st.st_mode))) {
952 cert_dir = (char *)SSL_DIR;
956 rv = nss_init_core(data, cert_dir);
960 if(num_enabled_ciphers() == 0)
961 NSS_SetDomesticPolicy();
970 * @retval 0 error initializing SSL
971 * @retval 1 SSL initialized successfully
973 int Curl_nss_init(void)
975 /* curl_global_init() is not thread-safe so this test is ok */
976 if(nss_initlock == NULL) {
977 PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256);
978 nss_initlock = PR_NewLock();
979 nss_crllock = PR_NewLock();
982 /* We will actually initialize NSS later */
987 CURLcode Curl_nss_force_init(struct SessionHandle *data)
992 "unable to initialize NSS, curl_global_init() should have been "
993 "called with CURL_GLOBAL_SSL or CURL_GLOBAL_ALL");
994 return CURLE_FAILED_INIT;
997 PR_Lock(nss_initlock);
999 PR_Unlock(nss_initlock);
1003 /* Global cleanup */
1004 void Curl_nss_cleanup(void)
1006 /* This function isn't required to be threadsafe and this is only done
1007 * as a safety feature.
1009 PR_Lock(nss_initlock);
1011 /* Free references to client certificates held in the SSL session cache.
1012 * Omitting this hampers destruction of the security module owning
1013 * the certificates. */
1014 SSL_ClearSessionCache();
1016 if(mod && SECSuccess == SECMOD_UnloadUserModule(mod)) {
1017 SECMOD_DestroyModule(mod);
1020 NSS_ShutdownContext(nss_context);
1023 PR_Unlock(nss_initlock);
1025 PR_DestroyLock(nss_initlock);
1026 PR_DestroyLock(nss_crllock);
1027 nss_initlock = NULL;
1033 * This function uses SSL_peek to determine connection status.
1036 * 1 means the connection is still in place
1037 * 0 means the connection has been closed
1038 * -1 means the connection status is unknown
1041 Curl_nss_check_cxn(struct connectdata *conn)
1047 PR_Recv(conn->ssl[FIRSTSOCKET].handle, (void *)&buf, 1, PR_MSG_PEEK,
1048 PR_SecondsToInterval(1));
1050 return 1; /* connection still in place */
1053 return 0; /* connection has been closed */
1055 return -1; /* connection status unknown */
1059 * This function is called when an SSL connection is closed.
1061 void Curl_nss_close(struct connectdata *conn, int sockindex)
1063 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1065 if(connssl->handle) {
1066 /* NSS closes the socket we previously handed to it, so we must mark it
1067 as closed to avoid double close */
1068 fake_sclose(conn->sock[sockindex]);
1069 conn->sock[sockindex] = CURL_SOCKET_BAD;
1071 if((connssl->client_nickname != NULL) || (connssl->obj_clicert != NULL))
1072 /* A server might require different authentication based on the
1073 * particular path being requested by the client. To support this
1074 * scenario, we must ensure that a connection will never reuse the
1075 * authentication data from a previous connection. */
1076 SSL_InvalidateSession(connssl->handle);
1078 if(connssl->client_nickname != NULL) {
1079 free(connssl->client_nickname);
1080 connssl->client_nickname = NULL;
1082 /* destroy all NSS objects in order to avoid failure of NSS shutdown */
1083 Curl_llist_destroy(connssl->obj_list, NULL);
1084 connssl->obj_list = NULL;
1085 connssl->obj_clicert = NULL;
1087 PR_Close(connssl->handle);
1088 connssl->handle = NULL;
1093 * This function is called when the 'data' struct is going away. Close
1094 * down everything and free all resources!
1096 int Curl_nss_close_all(struct SessionHandle *data)
1102 /* return true if NSS can provide error code (and possibly msg) for the
1104 static bool is_nss_error(CURLcode err)
1107 case CURLE_PEER_FAILED_VERIFICATION:
1108 case CURLE_SSL_CACERT:
1109 case CURLE_SSL_CERTPROBLEM:
1110 case CURLE_SSL_CONNECT_ERROR:
1111 case CURLE_SSL_ISSUER_ERROR:
1119 /* return true if the given error code is related to a client certificate */
1120 static bool is_cc_error(PRInt32 err)
1123 case SSL_ERROR_BAD_CERT_ALERT:
1124 case SSL_ERROR_EXPIRED_CERT_ALERT:
1125 case SSL_ERROR_REVOKED_CERT_ALERT:
1133 static Curl_recv nss_recv;
1134 static Curl_send nss_send;
1136 static CURLcode nss_load_ca_certificates(struct connectdata *conn,
1139 struct SessionHandle *data = conn->data;
1140 const char *cafile = data->set.ssl.CAfile;
1141 const char *capath = data->set.ssl.CApath;
1144 CURLcode rv = nss_load_cert(&conn->ssl[sockindex], cafile, PR_TRUE);
1151 if(stat(capath, &st) == -1)
1152 return CURLE_SSL_CACERT_BADFILE;
1154 if(S_ISDIR(st.st_mode)) {
1156 PRDir *dir = PR_OpenDir(capath);
1158 return CURLE_SSL_CACERT_BADFILE;
1160 while((entry = PR_ReadDir(dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN))) {
1161 char *fullpath = aprintf("%s/%s", capath, entry->name);
1164 return CURLE_OUT_OF_MEMORY;
1167 if(CURLE_OK != nss_load_cert(&conn->ssl[sockindex], fullpath, PR_TRUE))
1168 /* This is purposefully tolerant of errors so non-PEM files can
1169 * be in the same directory */
1170 infof(data, "failed to load '%s' from CURLOPT_CAPATH\n", fullpath);
1178 infof(data, "warning: CURLOPT_CAPATH not a directory (%s)\n", capath);
1181 infof(data, " CAfile: %s\n CApath: %s\n",
1182 cafile ? cafile : "none",
1183 capath ? capath : "none");
1188 static CURLcode nss_init_sslver(SSLVersionRange *sslver,
1189 struct SessionHandle *data)
1191 switch (data->set.ssl.version) {
1193 case CURL_SSLVERSION_DEFAULT:
1194 if(data->state.ssl_connect_retry) {
1195 infof(data, "TLS disabled due to previous handshake failure\n");
1196 sslver->max = SSL_LIBRARY_VERSION_3_0;
1200 case CURL_SSLVERSION_TLSv1:
1201 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1202 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1203 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1204 #elif defined SSL_LIBRARY_VERSION_TLS_1_1
1205 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1207 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1211 case CURL_SSLVERSION_SSLv2:
1212 sslver->min = SSL_LIBRARY_VERSION_2;
1213 sslver->max = SSL_LIBRARY_VERSION_2;
1216 case CURL_SSLVERSION_SSLv3:
1217 sslver->min = SSL_LIBRARY_VERSION_3_0;
1218 sslver->max = SSL_LIBRARY_VERSION_3_0;
1221 case CURL_SSLVERSION_TLSv1_0:
1222 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1223 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1226 case CURL_SSLVERSION_TLSv1_1:
1227 #ifdef SSL_LIBRARY_VERSION_TLS_1_1
1228 sslver->min = SSL_LIBRARY_VERSION_TLS_1_1;
1229 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1234 case CURL_SSLVERSION_TLSv1_2:
1235 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1236 sslver->min = SSL_LIBRARY_VERSION_TLS_1_2;
1237 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1243 failf(data, "TLS minor version cannot be set");
1244 return CURLE_SSL_CONNECT_ERROR;
1247 CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex)
1249 PRErrorCode err = 0;
1250 PRFileDesc *model = NULL;
1251 PRBool ssl_no_cache;
1252 PRBool ssl_cbc_random_iv;
1253 struct SessionHandle *data = conn->data;
1254 curl_socket_t sockfd = conn->sock[sockindex];
1255 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1257 const int *cipher_to_enable;
1258 PRSocketOptionData sock_opt;
1262 SSLVersionRange sslver = {
1263 SSL_LIBRARY_VERSION_3_0, /* min */
1264 SSL_LIBRARY_VERSION_TLS_1_0 /* max */
1267 if(connssl->state == ssl_connection_complete)
1270 connssl->data = data;
1272 /* list of all NSS objects we need to destroy in Curl_nss_close() */
1273 connssl->obj_list = Curl_llist_alloc(nss_destroy_object);
1274 if(!connssl->obj_list)
1275 return CURLE_OUT_OF_MEMORY;
1277 /* FIXME. NSS doesn't support multiple databases open at the same time. */
1278 PR_Lock(nss_initlock);
1279 curlerr = nss_init(conn->data);
1280 if(CURLE_OK != curlerr) {
1281 PR_Unlock(nss_initlock);
1285 curlerr = CURLE_SSL_CONNECT_ERROR;
1288 char *configstring = aprintf("library=%s name=PEM", pem_library);
1290 PR_Unlock(nss_initlock);
1293 mod = SECMOD_LoadUserModule(configstring, NULL, PR_FALSE);
1296 if(!mod || !mod->loaded) {
1298 SECMOD_DestroyModule(mod);
1301 infof(data, "WARNING: failed to load NSS PEM library %s. Using "
1302 "OpenSSL PEM certificates will not work.\n", pem_library);
1306 PK11_SetPasswordFunc(nss_get_password);
1307 PR_Unlock(nss_initlock);
1309 model = PR_NewTCPSocket();
1312 model = SSL_ImportFD(NULL, model);
1314 if(SSL_OptionSet(model, SSL_SECURITY, PR_TRUE) != SECSuccess)
1316 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_SERVER, PR_FALSE) != SECSuccess)
1318 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE) != SECSuccess)
1321 /* do not use SSL cache if disabled or we are not going to verify peer */
1322 ssl_no_cache = (conn->ssl_config.sessionid && data->set.ssl.verifypeer) ?
1324 if(SSL_OptionSet(model, SSL_NO_CACHE, ssl_no_cache) != SECSuccess)
1327 /* enable/disable the requested SSL version(s) */
1328 if(nss_init_sslver(&sslver, data) != CURLE_OK)
1330 if(SSL_VersionRangeSet(model, &sslver) != SECSuccess)
1333 ssl_cbc_random_iv = !data->set.ssl_enable_beast;
1334 #ifdef SSL_CBC_RANDOM_IV
1335 /* unless the user explicitly asks to allow the protocol vulnerability, we
1336 use the work-around */
1337 if(SSL_OptionSet(model, SSL_CBC_RANDOM_IV, ssl_cbc_random_iv) != SECSuccess)
1338 infof(data, "warning: failed to set SSL_CBC_RANDOM_IV = %d\n",
1341 if(ssl_cbc_random_iv)
1342 infof(data, "warning: support for SSL_CBC_RANDOM_IV not compiled in\n");
1345 /* reset the flag to avoid an infinite loop */
1346 data->state.ssl_connect_retry = FALSE;
1348 /* enable all ciphers from enable_ciphers_by_default */
1349 cipher_to_enable = enable_ciphers_by_default;
1350 while(SSL_NULL_WITH_NULL_NULL != *cipher_to_enable) {
1351 if(SSL_CipherPrefSet(model, *cipher_to_enable, PR_TRUE) != SECSuccess) {
1352 curlerr = CURLE_SSL_CIPHER;
1358 if(data->set.ssl.cipher_list) {
1359 if(set_ciphers(data, model, data->set.ssl.cipher_list) != SECSuccess) {
1360 curlerr = CURLE_SSL_CIPHER;
1365 if(!data->set.ssl.verifypeer && data->set.ssl.verifyhost)
1366 infof(data, "warning: ignoring value of ssl.verifyhost\n");
1368 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
1370 if(SSL_AuthCertificateHook(model, nss_auth_cert_hook, conn) != SECSuccess)
1373 data->set.ssl.certverifyresult=0; /* not checked yet */
1374 if(SSL_BadCertHook(model, BadCertHandler, conn) != SECSuccess)
1377 if(SSL_HandshakeCallback(model, HandshakeCallback, NULL) != SECSuccess)
1380 if(data->set.ssl.verifypeer) {
1381 const CURLcode rv = nss_load_ca_certificates(conn, sockindex);
1382 if(CURLE_OK != rv) {
1388 if(data->set.ssl.CRLfile) {
1389 if(SECSuccess != nss_load_crl(data->set.ssl.CRLfile)) {
1390 curlerr = CURLE_SSL_CRL_BADFILE;
1395 data->set.ssl.CRLfile ? data->set.ssl.CRLfile : "none");
1398 if(data->set.str[STRING_CERT]) {
1399 char *nickname = dup_nickname(data, STRING_CERT);
1401 /* we are not going to use libnsspem.so to read the client cert */
1402 connssl->obj_clicert = NULL;
1405 CURLcode rv = cert_stuff(conn, sockindex, data->set.str[STRING_CERT],
1406 data->set.str[STRING_KEY]);
1407 if(CURLE_OK != rv) {
1408 /* failf() is already done in cert_stuff() */
1414 /* store the nickname for SelectClientCert() called during handshake */
1415 connssl->client_nickname = nickname;
1418 connssl->client_nickname = NULL;
1420 if(SSL_GetClientAuthDataHook(model, SelectClientCert,
1421 (void *)connssl) != SECSuccess) {
1422 curlerr = CURLE_SSL_CERTPROBLEM;
1426 /* Import our model socket onto the existing file descriptor */
1427 connssl->handle = PR_ImportTCPSocket(sockfd);
1428 connssl->handle = SSL_ImportFD(model, connssl->handle);
1429 if(!connssl->handle)
1432 PR_Close(model); /* We don't need this any more */
1435 /* This is the password associated with the cert that we're using */
1436 if(data->set.str[STRING_KEY_PASSWD]) {
1437 SSL_SetPKCS11PinArg(connssl->handle, data->set.str[STRING_KEY_PASSWD]);
1440 /* Force handshake on next I/O */
1441 SSL_ResetHandshake(connssl->handle, /* asServer */ PR_FALSE);
1443 SSL_SetURL(connssl->handle, conn->host.name);
1445 /* check timeout situation */
1446 time_left = Curl_timeleft(data, NULL, TRUE);
1447 if(time_left < 0L) {
1448 failf(data, "timed out before SSL handshake");
1449 curlerr = CURLE_OPERATION_TIMEDOUT;
1452 timeout = PR_MillisecondsToInterval((PRUint32) time_left);
1454 /* Force the handshake now */
1455 if(SSL_ForceHandshakeWithTimeout(connssl->handle, timeout) != SECSuccess) {
1456 if(conn->data->set.ssl.certverifyresult == SSL_ERROR_BAD_CERT_DOMAIN)
1457 curlerr = CURLE_PEER_FAILED_VERIFICATION;
1458 else if(conn->data->set.ssl.certverifyresult!=0)
1459 curlerr = CURLE_SSL_CACERT;
1463 /* switch the SSL socket into non-blocking mode */
1464 sock_opt.option = PR_SockOpt_Nonblocking;
1465 sock_opt.value.non_blocking = PR_TRUE;
1466 if(PR_SetSocketOption(connssl->handle, &sock_opt) != PR_SUCCESS)
1469 connssl->state = ssl_connection_complete;
1470 conn->recv[sockindex] = nss_recv;
1471 conn->send[sockindex] = nss_send;
1473 display_conn_info(conn, connssl->handle);
1475 if(data->set.str[STRING_SSL_ISSUERCERT]) {
1476 SECStatus ret = SECFailure;
1477 char *nickname = dup_nickname(data, STRING_SSL_ISSUERCERT);
1479 /* we support only nicknames in case of STRING_SSL_ISSUERCERT for now */
1480 ret = check_issuer_cert(connssl->handle, nickname);
1484 if(SECFailure == ret) {
1485 infof(data,"SSL certificate issuer check failed\n");
1486 curlerr = CURLE_SSL_ISSUER_ERROR;
1490 infof(data, "SSL certificate issuer check ok\n");
1497 /* reset the flag to avoid an infinite loop */
1498 data->state.ssl_connect_retry = FALSE;
1500 if(is_nss_error(curlerr)) {
1501 /* read NSPR error code */
1502 err = PR_GetError();
1503 if(is_cc_error(err))
1504 curlerr = CURLE_SSL_CERTPROBLEM;
1506 /* print the error number and error string */
1507 infof(data, "NSS error %d (%s)\n", err, nss_error_to_name(err));
1509 /* print a human-readable message describing the error if available */
1510 nss_print_error_message(data, err);
1516 /* cleanup on connection failure */
1517 Curl_llist_destroy(connssl->obj_list, NULL);
1518 connssl->obj_list = NULL;
1520 if((sslver.min == SSL_LIBRARY_VERSION_3_0)
1521 && (sslver.max == SSL_LIBRARY_VERSION_TLS_1_0)
1522 && isTLSIntoleranceError(err)) {
1523 /* schedule reconnect through Curl_retry_request() */
1524 data->state.ssl_connect_retry = TRUE;
1525 infof(data, "Error in TLS handshake, trying SSLv3...\n");
1532 static ssize_t nss_send(struct connectdata *conn, /* connection data */
1533 int sockindex, /* socketindex */
1534 const void *mem, /* send this data */
1535 size_t len, /* amount to write */
1538 ssize_t rc = PR_Send(conn->ssl[sockindex].handle, mem, (int)len, 0,
1539 PR_INTERVAL_NO_WAIT);
1541 PRInt32 err = PR_GetError();
1542 if(err == PR_WOULD_BLOCK_ERROR)
1543 *curlcode = CURLE_AGAIN;
1545 /* print the error number and error string */
1546 const char *err_name = nss_error_to_name(err);
1547 infof(conn->data, "SSL write: error %d (%s)\n", err, err_name);
1549 /* print a human-readable message describing the error if available */
1550 nss_print_error_message(conn->data, err);
1552 *curlcode = (is_cc_error(err))
1553 ? CURLE_SSL_CERTPROBLEM
1558 return rc; /* number of bytes */
1561 static ssize_t nss_recv(struct connectdata * conn, /* connection data */
1562 int num, /* socketindex */
1563 char *buf, /* store read data here */
1564 size_t buffersize, /* max amount to read */
1567 ssize_t nread = PR_Recv(conn->ssl[num].handle, buf, (int)buffersize, 0,
1568 PR_INTERVAL_NO_WAIT);
1570 /* failed SSL read */
1571 PRInt32 err = PR_GetError();
1573 if(err == PR_WOULD_BLOCK_ERROR)
1574 *curlcode = CURLE_AGAIN;
1576 /* print the error number and error string */
1577 const char *err_name = nss_error_to_name(err);
1578 infof(conn->data, "SSL read: errno %d (%s)\n", err, err_name);
1580 /* print a human-readable message describing the error if available */
1581 nss_print_error_message(conn->data, err);
1583 *curlcode = (is_cc_error(err))
1584 ? CURLE_SSL_CERTPROBLEM
1592 size_t Curl_nss_version(char *buffer, size_t size)
1594 return snprintf(buffer, size, "NSS/%s", NSS_VERSION);
1597 int Curl_nss_seed(struct SessionHandle *data)
1599 /* make sure that NSS is initialized */
1600 return !!Curl_nss_force_init(data);
1603 void Curl_nss_random(struct SessionHandle *data,
1604 unsigned char *entropy,
1607 Curl_nss_seed(data); /* Initiate the seed if not already done */
1608 if(SECSuccess != PK11_GenerateRandom(entropy, curlx_uztosi(length))) {
1609 /* no way to signal a failure from here, we have to abort */
1610 failf(data, "PK11_GenerateRandom() failed, calling abort()...");
1615 void Curl_nss_md5sum(unsigned char *tmp, /* input */
1617 unsigned char *md5sum, /* output */
1620 PK11Context *MD5pw = PK11_CreateDigestContext(SEC_OID_MD5);
1621 unsigned int MD5out;
1622 PK11_DigestOp(MD5pw, tmp, curlx_uztoui(tmplen));
1623 PK11_DigestFinal(MD5pw, md5sum, &MD5out, curlx_uztoui(md5len));
1624 PK11_DestroyContext(MD5pw, PR_TRUE);
1627 #endif /* USE_NSS */