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 vtls.c should ever call or use these functions.
28 #include "curl_setup.h"
34 #include "formdata.h" /* for the boundary function */
35 #include "url.h" /* for the ssl config check function */
42 #define _MPRINTF_REPLACE /* use the internal *printf() functions */
43 #include <curl/mprintf.h>
63 #include "curl_memory.h"
68 /* The last #include file should be: */
71 #define SSL_DIR "/etc/pki/nssdb"
73 /* enough to fit the string "PEM Token #[0|1]" */
76 PRFileDesc *PR_ImportTCPSocket(PRInt32 osfd);
78 PRLock * nss_initlock = NULL;
79 PRLock * nss_crllock = NULL;
80 NSSInitContext * nss_context = NULL;
82 volatile int initialized = 0;
89 #define PK11_SETATTRS(_attr, _idx, _type, _val, _len) do { \
90 CK_ATTRIBUTE *ptr = (_attr) + ((_idx)++); \
91 ptr->type = (_type); \
92 ptr->pValue = (_val); \
93 ptr->ulValueLen = (_len); \
96 #define CERT_NewTempCertificate __CERT_NewTempCertificate
98 #define NUM_OF_CIPHERS sizeof(cipherlist)/sizeof(cipherlist[0])
99 static const cipher_s cipherlist[] = {
100 /* SSL2 cipher suites */
101 {"rc4", SSL_EN_RC4_128_WITH_MD5},
102 {"rc4-md5", SSL_EN_RC4_128_WITH_MD5},
103 {"rc4export", SSL_EN_RC4_128_EXPORT40_WITH_MD5},
104 {"rc2", SSL_EN_RC2_128_CBC_WITH_MD5},
105 {"rc2export", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5},
106 {"des", SSL_EN_DES_64_CBC_WITH_MD5},
107 {"desede3", SSL_EN_DES_192_EDE3_CBC_WITH_MD5},
108 /* SSL3/TLS cipher suites */
109 {"rsa_rc4_128_md5", SSL_RSA_WITH_RC4_128_MD5},
110 {"rsa_rc4_128_sha", SSL_RSA_WITH_RC4_128_SHA},
111 {"rsa_3des_sha", SSL_RSA_WITH_3DES_EDE_CBC_SHA},
112 {"rsa_des_sha", SSL_RSA_WITH_DES_CBC_SHA},
113 {"rsa_rc4_40_md5", SSL_RSA_EXPORT_WITH_RC4_40_MD5},
114 {"rsa_rc2_40_md5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5},
115 {"rsa_null_md5", SSL_RSA_WITH_NULL_MD5},
116 {"rsa_null_sha", SSL_RSA_WITH_NULL_SHA},
117 {"fips_3des_sha", SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA},
118 {"fips_des_sha", SSL_RSA_FIPS_WITH_DES_CBC_SHA},
119 {"fortezza", SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA},
120 {"fortezza_rc4_128_sha", SSL_FORTEZZA_DMS_WITH_RC4_128_SHA},
121 {"fortezza_null", SSL_FORTEZZA_DMS_WITH_NULL_SHA},
122 /* TLS 1.0: Exportable 56-bit Cipher Suites. */
123 {"rsa_des_56_sha", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA},
124 {"rsa_rc4_56_sha", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA},
126 {"rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA},
127 {"rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA},
129 {"ecdh_ecdsa_null_sha", TLS_ECDH_ECDSA_WITH_NULL_SHA},
130 {"ecdh_ecdsa_rc4_128_sha", TLS_ECDH_ECDSA_WITH_RC4_128_SHA},
131 {"ecdh_ecdsa_3des_sha", TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA},
132 {"ecdh_ecdsa_aes_128_sha", TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA},
133 {"ecdh_ecdsa_aes_256_sha", TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA},
134 {"ecdhe_ecdsa_null_sha", TLS_ECDHE_ECDSA_WITH_NULL_SHA},
135 {"ecdhe_ecdsa_rc4_128_sha", TLS_ECDHE_ECDSA_WITH_RC4_128_SHA},
136 {"ecdhe_ecdsa_3des_sha", TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA},
137 {"ecdhe_ecdsa_aes_128_sha", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA},
138 {"ecdhe_ecdsa_aes_256_sha", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA},
139 {"ecdh_rsa_null_sha", TLS_ECDH_RSA_WITH_NULL_SHA},
140 {"ecdh_rsa_128_sha", TLS_ECDH_RSA_WITH_RC4_128_SHA},
141 {"ecdh_rsa_3des_sha", TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA},
142 {"ecdh_rsa_aes_128_sha", TLS_ECDH_RSA_WITH_AES_128_CBC_SHA},
143 {"ecdh_rsa_aes_256_sha", TLS_ECDH_RSA_WITH_AES_256_CBC_SHA},
144 {"echde_rsa_null", TLS_ECDHE_RSA_WITH_NULL_SHA},
145 {"ecdhe_rsa_rc4_128_sha", TLS_ECDHE_RSA_WITH_RC4_128_SHA},
146 {"ecdhe_rsa_3des_sha", TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA},
147 {"ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
148 {"ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA},
149 {"ecdh_anon_null_sha", TLS_ECDH_anon_WITH_NULL_SHA},
150 {"ecdh_anon_rc4_128sha", TLS_ECDH_anon_WITH_RC4_128_SHA},
151 {"ecdh_anon_3des_sha", TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA},
152 {"ecdh_anon_aes_128_sha", TLS_ECDH_anon_WITH_AES_128_CBC_SHA},
153 {"ecdh_anon_aes_256_sha", TLS_ECDH_anon_WITH_AES_256_CBC_SHA},
156 /* following ciphers are new in NSS 3.4 and not enabled by default, therefore
157 they are enabled explicitly */
158 static const int enable_ciphers_by_default[] = {
159 TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
160 TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
161 TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
162 TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
163 TLS_RSA_WITH_AES_128_CBC_SHA,
164 TLS_RSA_WITH_AES_256_CBC_SHA,
165 SSL_NULL_WITH_NULL_NULL
168 static const char* pem_library = "libnsspem.so";
169 SECMODModule* mod = NULL;
171 static const char* nss_error_to_name(PRErrorCode code)
173 const char *name = PR_ErrorToName(code);
177 return "unknown error";
180 static void nss_print_error_message(struct SessionHandle *data, PRUint32 err)
182 failf(data, "%s", PR_ErrorToString(err, PR_LANGUAGE_I_DEFAULT));
185 static SECStatus set_ciphers(struct SessionHandle *data, PRFileDesc * model,
189 PRBool cipher_state[NUM_OF_CIPHERS];
193 /* First disable all ciphers. This uses a different max value in case
194 * NSS adds more ciphers later we don't want them available by
197 for(i=0; i<SSL_NumImplementedCiphers; i++) {
198 SSL_CipherPrefSet(model, SSL_ImplementedCiphers[i], PR_FALSE);
201 /* Set every entry in our list to false */
202 for(i=0; i<NUM_OF_CIPHERS; i++) {
203 cipher_state[i] = PR_FALSE;
206 cipher = cipher_list;
208 while(cipher_list && (cipher_list[0])) {
209 while((*cipher) && (ISSPACE(*cipher)))
212 if((cipher_list = strchr(cipher, ','))) {
213 *cipher_list++ = '\0';
218 for(i=0; i<NUM_OF_CIPHERS; i++) {
219 if(Curl_raw_equal(cipher, cipherlist[i].name)) {
220 cipher_state[i] = PR_TRUE;
226 if(found == PR_FALSE) {
227 failf(data, "Unknown cipher in list: %s", cipher);
232 cipher = cipher_list;
236 /* Finally actually enable the selected ciphers */
237 for(i=0; i<NUM_OF_CIPHERS; i++) {
241 if(SSL_CipherPrefSet(model, cipherlist[i].num, PR_TRUE) != SECSuccess) {
242 failf(data, "cipher-suite not supported by NSS: %s", cipherlist[i].name);
251 * Get the number of ciphers that are enabled. We use this to determine
252 * if we need to call NSS_SetDomesticPolicy() to enable the default ciphers.
254 static int num_enabled_ciphers(void)
260 for(i=0; i<NUM_OF_CIPHERS; i++) {
261 SSL_CipherPolicyGet(cipherlist[i].num, &policy);
269 * Determine whether the nickname passed in is a filename that needs to
270 * be loaded as a PEM or a regular NSS nickname.
272 * returns 1 for a file
273 * returns 0 for not a file (NSS nickname)
275 static int is_file(const char *filename)
282 if(stat(filename, &st) == 0)
283 if(S_ISREG(st.st_mode))
289 /* Check if the given string is filename or nickname of a certificate. If the
290 * given string is recognized as filename, return NULL. If the given string is
291 * recognized as nickname, return a duplicated string. The returned string
292 * should be later deallocated using free(). If the OOM failure occurs, we
295 static char* dup_nickname(struct SessionHandle *data, enum dupstring cert_kind)
297 const char *str = data->set.str[cert_kind];
301 /* no such file exists, use the string as nickname */
304 /* search the last slash; we require at least one slash in a file name */
305 n = strrchr(str, '/');
307 infof(data, "warning: certificate file name \"%s\" handled as nickname; "
308 "please use \"./%s\" to force file name\n", str, str);
312 /* we'll use the PEM reader to read the certificate from file */
316 /* Call PK11_CreateGenericObject() with the given obj_class and filename. If
317 * the call succeeds, append the object handle to the list of objects so that
318 * the object can be destroyed in Curl_nss_close(). */
319 static CURLcode nss_create_object(struct ssl_connect_data *ssl,
320 CK_OBJECT_CLASS obj_class,
321 const char *filename, bool cacert)
324 PK11GenericObject *obj;
325 CK_BBOOL cktrue = CK_TRUE;
326 CK_BBOOL ckfalse = CK_FALSE;
327 CK_ATTRIBUTE attrs[/* max count of attributes */ 4];
329 CURLcode err = (cacert)
330 ? CURLE_SSL_CACERT_BADFILE
331 : CURLE_SSL_CERTPROBLEM;
333 const int slot_id = (cacert) ? 0 : 1;
334 char *slot_name = aprintf("PEM Token #%d", slot_id);
336 return CURLE_OUT_OF_MEMORY;
338 slot = PK11_FindSlotByName(slot_name);
343 PK11_SETATTRS(attrs, attr_cnt, CKA_CLASS, &obj_class, sizeof(obj_class));
344 PK11_SETATTRS(attrs, attr_cnt, CKA_TOKEN, &cktrue, sizeof(CK_BBOOL));
345 PK11_SETATTRS(attrs, attr_cnt, CKA_LABEL, (unsigned char *)filename,
346 strlen(filename) + 1);
348 if(CKO_CERTIFICATE == obj_class) {
349 CK_BBOOL *pval = (cacert) ? (&cktrue) : (&ckfalse);
350 PK11_SETATTRS(attrs, attr_cnt, CKA_TRUST, pval, sizeof(*pval));
353 obj = PK11_CreateGenericObject(slot, attrs, attr_cnt, PR_FALSE);
358 if(!Curl_llist_insert_next(ssl->obj_list, ssl->obj_list->tail, obj)) {
359 PK11_DestroyGenericObject(obj);
360 return CURLE_OUT_OF_MEMORY;
363 if(!cacert && CKO_CERTIFICATE == obj_class)
364 /* store reference to a client certificate */
365 ssl->obj_clicert = obj;
370 /* Destroy the NSS object whose handle is given by ptr. This function is
371 * a callback of Curl_llist_alloc() used by Curl_llist_destroy() to destroy
372 * NSS objects in Curl_nss_close() */
373 static void nss_destroy_object(void *user, void *ptr)
375 PK11GenericObject *obj = (PK11GenericObject *)ptr;
377 PK11_DestroyGenericObject(obj);
380 static CURLcode nss_load_cert(struct ssl_connect_data *ssl,
381 const char *filename, PRBool cacert)
383 CURLcode err = (cacert)
384 ? CURLE_SSL_CACERT_BADFILE
385 : CURLE_SSL_CERTPROBLEM;
387 /* libnsspem.so leaks memory if the requested file does not exist. For more
388 * details, go to <https://bugzilla.redhat.com/734760>. */
389 if(is_file(filename))
390 err = nss_create_object(ssl, CKO_CERTIFICATE, filename, cacert);
392 if(CURLE_OK == err && !cacert) {
393 /* we have successfully loaded a client certificate */
394 CERTCertificate *cert;
395 char *nickname = NULL;
396 char *n = strrchr(filename, '/');
400 /* The following undocumented magic helps to avoid a SIGSEGV on call
401 * of PK11_ReadRawAttribute() from SelectClientCert() when using an
402 * immature version of libnsspem.so. For more details, go to
403 * <https://bugzilla.redhat.com/733685>. */
404 nickname = aprintf("PEM Token #1:%s", n);
406 cert = PK11_FindCertFromNickname(nickname, NULL);
408 CERT_DestroyCertificate(cert);
417 /* add given CRL to cache if it is not already there */
418 static SECStatus nss_cache_crl(SECItem *crlDER)
420 CERTCertDBHandle *db = CERT_GetDefaultCertDB();
421 CERTSignedCrl *crl = SEC_FindCrlByDERCert(db, crlDER, 0);
423 /* CRL already cached */
425 SECITEM_FreeItem(crlDER, PR_FALSE);
429 /* acquire lock before call of CERT_CacheCRL() */
430 PR_Lock(nss_crllock);
431 if(SECSuccess != CERT_CacheCRL(db, crlDER)) {
432 /* unable to cache CRL */
433 PR_Unlock(nss_crllock);
434 SECITEM_FreeItem(crlDER, PR_FALSE);
438 /* we need to clear session cache, so that the CRL could take effect */
439 SSL_ClearSessionCache();
440 PR_Unlock(nss_crllock);
444 static SECStatus nss_load_crl(const char* crlfilename)
448 SECItem filedata = { 0, NULL, 0 };
449 SECItem crlDER = { 0, NULL, 0 };
452 infile = PR_Open(crlfilename, PR_RDONLY, 0);
456 if(PR_SUCCESS != PR_GetOpenFileInfo(infile, &info))
459 if(!SECITEM_AllocItem(NULL, &filedata, info.size + /* zero ended */ 1))
462 if(info.size != PR_Read(infile, filedata.data, info.size))
465 /* place a trailing zero right after the visible data */
466 body = (char*)filedata.data;
467 body[--filedata.len] = '\0';
469 body = strstr(body, "-----BEGIN");
473 char *begin = PORT_Strchr(body, '\n');
475 begin = PORT_Strchr(body, '\r');
479 trailer = strstr(++begin, "-----END");
483 /* retrieve DER from ASCII */
485 if(ATOB_ConvertAsciiToItem(&crlDER, begin))
488 SECITEM_FreeItem(&filedata, PR_FALSE);
495 return nss_cache_crl(&crlDER);
499 SECITEM_FreeItem(&filedata, PR_FALSE);
503 static CURLcode nss_load_key(struct connectdata *conn, int sockindex,
509 struct ssl_connect_data *ssl = conn->ssl;
510 (void)sockindex; /* unused */
512 rv = nss_create_object(ssl, CKO_PRIVATE_KEY, key_file, FALSE);
514 PR_SetError(SEC_ERROR_BAD_KEY, 0);
518 slot = PK11_FindSlotByName("PEM Token #1");
520 return CURLE_SSL_CERTPROBLEM;
522 /* This will force the token to be seen as re-inserted */
523 SECMOD_WaitForAnyTokenEvent(mod, 0, 0);
524 PK11_IsPresent(slot);
526 status = PK11_Authenticate(slot, PR_TRUE,
527 conn->data->set.str[STRING_KEY_PASSWD]);
529 return (SECSuccess == status)
531 : CURLE_SSL_CERTPROBLEM;
534 static int display_error(struct connectdata *conn, PRInt32 err,
535 const char *filename)
538 case SEC_ERROR_BAD_PASSWORD:
539 failf(conn->data, "Unable to load client key: Incorrect password");
541 case SEC_ERROR_UNKNOWN_CERT:
542 failf(conn->data, "Unable to load certificate %s", filename);
547 return 0; /* The caller will print a generic error */
550 static CURLcode cert_stuff(struct connectdata *conn, int sockindex,
551 char *cert_file, char *key_file)
553 struct SessionHandle *data = conn->data;
557 rv = nss_load_cert(&conn->ssl[sockindex], cert_file, PR_FALSE);
559 const PRErrorCode err = PR_GetError();
560 if(!display_error(conn, err, cert_file)) {
561 const char *err_name = nss_error_to_name(err);
562 failf(data, "unable to load client cert: %d (%s)", err, err_name);
569 if(key_file || (is_file(cert_file))) {
571 rv = nss_load_key(conn, sockindex, key_file);
573 /* In case the cert file also has the key */
574 rv = nss_load_key(conn, sockindex, cert_file);
576 const PRErrorCode err = PR_GetError();
577 if(!display_error(conn, err, key_file)) {
578 const char *err_name = nss_error_to_name(err);
579 failf(data, "unable to load client key: %d (%s)", err, err_name);
589 static char * nss_get_password(PK11SlotInfo * slot, PRBool retry, void *arg)
591 (void)slot; /* unused */
592 if(retry || NULL == arg)
595 return (char *)PORT_Strdup((char *)arg);
598 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
600 static SECStatus nss_auth_cert_hook(void *arg, PRFileDesc *fd, PRBool checksig,
603 struct connectdata *conn = (struct connectdata *)arg;
604 if(!conn->data->set.ssl.verifypeer) {
605 infof(conn->data, "skipping SSL peer certificate verification\n");
609 return SSL_AuthCertificate(CERT_GetDefaultCertDB(), fd, checksig, isServer);
613 * Inform the application that the handshake is complete.
615 static void HandshakeCallback(PRFileDesc *sock, void *arg)
621 static void display_cert_info(struct SessionHandle *data,
622 CERTCertificate *cert)
624 char *subject, *issuer, *common_name;
625 PRExplodedTime printableTime;
626 char timeString[256];
627 PRTime notBefore, notAfter;
629 subject = CERT_NameToAscii(&cert->subject);
630 issuer = CERT_NameToAscii(&cert->issuer);
631 common_name = CERT_GetCommonName(&cert->subject);
632 infof(data, "\tsubject: %s\n", subject);
634 CERT_GetCertTimes(cert, ¬Before, ¬After);
635 PR_ExplodeTime(notBefore, PR_GMTParameters, &printableTime);
636 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
637 infof(data, "\tstart date: %s\n", timeString);
638 PR_ExplodeTime(notAfter, PR_GMTParameters, &printableTime);
639 PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime);
640 infof(data, "\texpire date: %s\n", timeString);
641 infof(data, "\tcommon name: %s\n", common_name);
642 infof(data, "\tissuer: %s\n", issuer);
646 PR_Free(common_name);
649 static void display_conn_info(struct connectdata *conn, PRFileDesc *sock)
651 SSLChannelInfo channel;
652 SSLCipherSuiteInfo suite;
653 CERTCertificate *cert;
654 CERTCertificate *cert2;
655 CERTCertificate *cert3;
659 if(SSL_GetChannelInfo(sock, &channel, sizeof channel) ==
660 SECSuccess && channel.length == sizeof channel &&
661 channel.cipherSuite) {
662 if(SSL_GetCipherSuiteInfo(channel.cipherSuite,
663 &suite, sizeof suite) == SECSuccess) {
664 infof(conn->data, "SSL connection using %s\n", suite.cipherSuiteName);
668 cert = SSL_PeerCertificate(sock);
671 infof(conn->data, "Server certificate:\n");
673 if(!conn->data->set.ssl.certinfo) {
674 display_cert_info(conn->data, cert);
675 CERT_DestroyCertificate(cert);
678 /* Count certificates in chain. */
682 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
686 CERT_DestroyCertificate(cert2);
689 cert3 = CERT_FindCertIssuer(cert2, now, certUsageSSLCA);
690 CERT_DestroyCertificate(cert2);
694 Curl_ssl_init_certinfo(conn->data, i);
695 for(i = 0; cert; cert = cert2) {
696 Curl_extract_certinfo(conn, i++, (char *)cert->derCert.data,
697 (char *)cert->derCert.data + cert->derCert.len);
699 CERT_DestroyCertificate(cert);
702 cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA);
703 CERT_DestroyCertificate(cert);
711 static SECStatus BadCertHandler(void *arg, PRFileDesc *sock)
713 struct connectdata *conn = (struct connectdata *)arg;
714 struct SessionHandle *data = conn->data;
715 PRErrorCode err = PR_GetError();
716 CERTCertificate *cert;
718 /* remember the cert verification result */
719 data->set.ssl.certverifyresult = err;
721 if(err == SSL_ERROR_BAD_CERT_DOMAIN && !data->set.ssl.verifyhost)
722 /* we are asked not to verify the host name */
725 /* print only info about the cert, the error is printed off the callback */
726 cert = SSL_PeerCertificate(sock);
728 infof(data, "Server certificate:\n");
729 display_cert_info(data, cert);
730 CERT_DestroyCertificate(cert);
738 * Check that the Peer certificate's issuer certificate matches the one found
739 * by issuer_nickname. This is not exactly the way OpenSSL and GNU TLS do the
740 * issuer check, so we provide comments that mimic the OpenSSL
741 * X509_check_issued function (in x509v3/v3_purp.c)
743 static SECStatus check_issuer_cert(PRFileDesc *sock,
744 char *issuer_nickname)
746 CERTCertificate *cert,*cert_issuer,*issuer;
747 SECStatus res=SECSuccess;
748 void *proto_win = NULL;
751 PRArenaPool *tmpArena = NULL;
752 CERTAuthKeyID *authorityKeyID = NULL;
753 SECITEM *caname = NULL;
756 cert = SSL_PeerCertificate(sock);
757 cert_issuer = CERT_FindCertIssuer(cert,PR_Now(),certUsageObjectSigner);
759 proto_win = SSL_RevealPinArg(sock);
760 issuer = PK11_FindCertFromNickname(issuer_nickname, proto_win);
762 if((!cert_issuer) || (!issuer))
764 else if(SECITEM_CompareItem(&cert_issuer->derCert,
765 &issuer->derCert)!=SECEqual)
768 CERT_DestroyCertificate(cert);
769 CERT_DestroyCertificate(issuer);
770 CERT_DestroyCertificate(cert_issuer);
776 * Callback to pick the SSL client certificate.
778 static SECStatus SelectClientCert(void *arg, PRFileDesc *sock,
779 struct CERTDistNamesStr *caNames,
780 struct CERTCertificateStr **pRetCert,
781 struct SECKEYPrivateKeyStr **pRetKey)
783 struct ssl_connect_data *connssl = (struct ssl_connect_data *)arg;
784 struct SessionHandle *data = connssl->data;
785 const char *nickname = connssl->client_nickname;
787 if(connssl->obj_clicert) {
788 /* use the cert/key provided by PEM reader */
789 static const char pem_slotname[] = "PEM Token #1";
790 SECItem cert_der = { 0, NULL, 0 };
791 void *proto_win = SSL_RevealPinArg(sock);
792 struct CERTCertificateStr *cert;
793 struct SECKEYPrivateKeyStr *key;
795 PK11SlotInfo *slot = PK11_FindSlotByName(pem_slotname);
797 failf(data, "NSS: PK11 slot not found: %s", pem_slotname);
801 if(PK11_ReadRawAttribute(PK11_TypeGeneric, connssl->obj_clicert, CKA_VALUE,
802 &cert_der) != SECSuccess) {
803 failf(data, "NSS: CKA_VALUE not found in PK11 generic object");
808 cert = PK11_FindCertFromDERCertItem(slot, &cert_der, proto_win);
809 SECITEM_FreeItem(&cert_der, PR_FALSE);
811 failf(data, "NSS: client certificate from file not found");
816 key = PK11_FindPrivateKeyFromCert(slot, cert, NULL);
819 failf(data, "NSS: private key from file not found");
820 CERT_DestroyCertificate(cert);
824 infof(data, "NSS: client certificate from file\n");
825 display_cert_info(data, cert);
832 /* use the default NSS hook */
833 if(SECSuccess != NSS_GetClientAuthData((void *)nickname, sock, caNames,
835 || NULL == *pRetCert) {
838 failf(data, "NSS: client certificate not found (nickname not "
841 failf(data, "NSS: client certificate not found: %s", nickname);
846 /* get certificate nickname if any */
847 nickname = (*pRetCert)->nickname;
849 nickname = "[unknown]";
851 if(NULL == *pRetKey) {
852 failf(data, "NSS: private key not found for certificate: %s", nickname);
856 infof(data, "NSS: using client certificate: %s\n", nickname);
857 display_cert_info(data, *pRetCert);
861 /* This function is supposed to decide, which error codes should be used
862 * to conclude server is TLS intolerant.
864 * taken from xulrunner - nsNSSIOLayer.cpp
867 isTLSIntoleranceError(PRInt32 err)
870 case SSL_ERROR_BAD_MAC_ALERT:
871 case SSL_ERROR_BAD_MAC_READ:
872 case SSL_ERROR_HANDSHAKE_FAILURE_ALERT:
873 case SSL_ERROR_HANDSHAKE_UNEXPECTED_ALERT:
874 case SSL_ERROR_CLIENT_KEY_EXCHANGE_FAILURE:
875 case SSL_ERROR_ILLEGAL_PARAMETER_ALERT:
876 case SSL_ERROR_NO_CYPHER_OVERLAP:
877 case SSL_ERROR_BAD_SERVER:
878 case SSL_ERROR_BAD_BLOCK_PADDING:
879 case SSL_ERROR_UNSUPPORTED_VERSION:
880 case SSL_ERROR_PROTOCOL_VERSION_ALERT:
881 case SSL_ERROR_RX_MALFORMED_FINISHED:
882 case SSL_ERROR_BAD_HANDSHAKE_HASH_VALUE:
883 case SSL_ERROR_DECODE_ERROR_ALERT:
884 case SSL_ERROR_RX_UNKNOWN_ALERT:
891 static CURLcode nss_init_core(struct SessionHandle *data, const char *cert_dir)
893 NSSInitParameters initparams;
895 if(nss_context != NULL)
898 memset((void *) &initparams, '\0', sizeof(initparams));
899 initparams.length = sizeof(initparams);
902 const bool use_sql = NSS_VersionCheck("3.12.0");
903 char *certpath = aprintf("%s%s", use_sql ? "sql:" : "", cert_dir);
905 return CURLE_OUT_OF_MEMORY;
907 infof(data, "Initializing NSS with certpath: %s\n", certpath);
908 nss_context = NSS_InitContext(certpath, "", "", "", &initparams,
909 NSS_INIT_READONLY | NSS_INIT_PK11RELOAD);
912 if(nss_context != NULL)
915 infof(data, "Unable to initialize NSS database\n");
918 infof(data, "Initializing NSS with certpath: none\n");
919 nss_context = NSS_InitContext("", "", "", "", &initparams, NSS_INIT_READONLY
920 | NSS_INIT_NOCERTDB | NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN
921 | NSS_INIT_NOROOTINIT | NSS_INIT_OPTIMIZESPACE | NSS_INIT_PK11RELOAD);
922 if(nss_context != NULL)
925 infof(data, "Unable to initialize NSS\n");
926 return CURLE_SSL_CACERT_BADFILE;
929 static CURLcode nss_init(struct SessionHandle *data)
938 /* First we check if $SSL_DIR points to a valid dir */
939 cert_dir = getenv("SSL_DIR");
941 if((stat(cert_dir, &st) != 0) ||
942 (!S_ISDIR(st.st_mode))) {
947 /* Now we check if the default location is a valid dir */
949 if((stat(SSL_DIR, &st) == 0) &&
950 (S_ISDIR(st.st_mode))) {
951 cert_dir = (char *)SSL_DIR;
955 rv = nss_init_core(data, cert_dir);
959 if(num_enabled_ciphers() == 0)
960 NSS_SetDomesticPolicy();
969 * @retval 0 error initializing SSL
970 * @retval 1 SSL initialized successfully
972 int Curl_nss_init(void)
974 /* curl_global_init() is not thread-safe so this test is ok */
975 if(nss_initlock == NULL) {
976 PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256);
977 nss_initlock = PR_NewLock();
978 nss_crllock = PR_NewLock();
981 /* We will actually initialize NSS later */
986 CURLcode Curl_nss_force_init(struct SessionHandle *data)
991 "unable to initialize NSS, curl_global_init() should have been "
992 "called with CURL_GLOBAL_SSL or CURL_GLOBAL_ALL");
993 return CURLE_FAILED_INIT;
996 PR_Lock(nss_initlock);
998 PR_Unlock(nss_initlock);
1002 /* Global cleanup */
1003 void Curl_nss_cleanup(void)
1005 /* This function isn't required to be threadsafe and this is only done
1006 * as a safety feature.
1008 PR_Lock(nss_initlock);
1010 /* Free references to client certificates held in the SSL session cache.
1011 * Omitting this hampers destruction of the security module owning
1012 * the certificates. */
1013 SSL_ClearSessionCache();
1015 if(mod && SECSuccess == SECMOD_UnloadUserModule(mod)) {
1016 SECMOD_DestroyModule(mod);
1019 NSS_ShutdownContext(nss_context);
1022 PR_Unlock(nss_initlock);
1024 PR_DestroyLock(nss_initlock);
1025 PR_DestroyLock(nss_crllock);
1026 nss_initlock = NULL;
1032 * This function uses SSL_peek to determine connection status.
1035 * 1 means the connection is still in place
1036 * 0 means the connection has been closed
1037 * -1 means the connection status is unknown
1040 Curl_nss_check_cxn(struct connectdata *conn)
1046 PR_Recv(conn->ssl[FIRSTSOCKET].handle, (void *)&buf, 1, PR_MSG_PEEK,
1047 PR_SecondsToInterval(1));
1049 return 1; /* connection still in place */
1052 return 0; /* connection has been closed */
1054 return -1; /* connection status unknown */
1058 * This function is called when an SSL connection is closed.
1060 void Curl_nss_close(struct connectdata *conn, int sockindex)
1062 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1064 if(connssl->handle) {
1065 /* NSS closes the socket we previously handed to it, so we must mark it
1066 as closed to avoid double close */
1067 fake_sclose(conn->sock[sockindex]);
1068 conn->sock[sockindex] = CURL_SOCKET_BAD;
1070 if((connssl->client_nickname != NULL) || (connssl->obj_clicert != NULL))
1071 /* A server might require different authentication based on the
1072 * particular path being requested by the client. To support this
1073 * scenario, we must ensure that a connection will never reuse the
1074 * authentication data from a previous connection. */
1075 SSL_InvalidateSession(connssl->handle);
1077 if(connssl->client_nickname != NULL) {
1078 free(connssl->client_nickname);
1079 connssl->client_nickname = NULL;
1081 /* destroy all NSS objects in order to avoid failure of NSS shutdown */
1082 Curl_llist_destroy(connssl->obj_list, NULL);
1083 connssl->obj_list = NULL;
1084 connssl->obj_clicert = NULL;
1086 PR_Close(connssl->handle);
1087 connssl->handle = NULL;
1092 * This function is called when the 'data' struct is going away. Close
1093 * down everything and free all resources!
1095 int Curl_nss_close_all(struct SessionHandle *data)
1101 /* return true if NSS can provide error code (and possibly msg) for the
1103 static bool is_nss_error(CURLcode err)
1106 case CURLE_PEER_FAILED_VERIFICATION:
1107 case CURLE_SSL_CACERT:
1108 case CURLE_SSL_CERTPROBLEM:
1109 case CURLE_SSL_CONNECT_ERROR:
1110 case CURLE_SSL_ISSUER_ERROR:
1118 /* return true if the given error code is related to a client certificate */
1119 static bool is_cc_error(PRInt32 err)
1122 case SSL_ERROR_BAD_CERT_ALERT:
1123 case SSL_ERROR_EXPIRED_CERT_ALERT:
1124 case SSL_ERROR_REVOKED_CERT_ALERT:
1132 static Curl_recv nss_recv;
1133 static Curl_send nss_send;
1135 static CURLcode nss_load_ca_certificates(struct connectdata *conn,
1138 struct SessionHandle *data = conn->data;
1139 const char *cafile = data->set.ssl.CAfile;
1140 const char *capath = data->set.ssl.CApath;
1143 CURLcode rv = nss_load_cert(&conn->ssl[sockindex], cafile, PR_TRUE);
1150 if(stat(capath, &st) == -1)
1151 return CURLE_SSL_CACERT_BADFILE;
1153 if(S_ISDIR(st.st_mode)) {
1155 PRDir *dir = PR_OpenDir(capath);
1157 return CURLE_SSL_CACERT_BADFILE;
1159 while((entry = PR_ReadDir(dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN))) {
1160 char *fullpath = aprintf("%s/%s", capath, entry->name);
1163 return CURLE_OUT_OF_MEMORY;
1166 if(CURLE_OK != nss_load_cert(&conn->ssl[sockindex], fullpath, PR_TRUE))
1167 /* This is purposefully tolerant of errors so non-PEM files can
1168 * be in the same directory */
1169 infof(data, "failed to load '%s' from CURLOPT_CAPATH\n", fullpath);
1177 infof(data, "warning: CURLOPT_CAPATH not a directory (%s)\n", capath);
1180 infof(data, " CAfile: %s\n CApath: %s\n",
1181 cafile ? cafile : "none",
1182 capath ? capath : "none");
1187 static CURLcode nss_init_sslver(SSLVersionRange *sslver,
1188 struct SessionHandle *data)
1190 switch (data->set.ssl.version) {
1192 case CURL_SSLVERSION_DEFAULT:
1193 if(data->state.ssl_connect_retry) {
1194 infof(data, "TLS disabled due to previous handshake failure\n");
1195 sslver->max = SSL_LIBRARY_VERSION_3_0;
1199 case CURL_SSLVERSION_TLSv1:
1200 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1201 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1202 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1203 #elif defined SSL_LIBRARY_VERSION_TLS_1_1
1204 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1206 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1210 case CURL_SSLVERSION_SSLv2:
1211 sslver->min = SSL_LIBRARY_VERSION_2;
1212 sslver->max = SSL_LIBRARY_VERSION_2;
1215 case CURL_SSLVERSION_SSLv3:
1216 sslver->min = SSL_LIBRARY_VERSION_3_0;
1217 sslver->max = SSL_LIBRARY_VERSION_3_0;
1220 case CURL_SSLVERSION_TLSv1_0:
1221 sslver->min = SSL_LIBRARY_VERSION_TLS_1_0;
1222 sslver->max = SSL_LIBRARY_VERSION_TLS_1_0;
1225 case CURL_SSLVERSION_TLSv1_1:
1226 #ifdef SSL_LIBRARY_VERSION_TLS_1_1
1227 sslver->min = SSL_LIBRARY_VERSION_TLS_1_1;
1228 sslver->max = SSL_LIBRARY_VERSION_TLS_1_1;
1233 case CURL_SSLVERSION_TLSv1_2:
1234 #ifdef SSL_LIBRARY_VERSION_TLS_1_2
1235 sslver->min = SSL_LIBRARY_VERSION_TLS_1_2;
1236 sslver->max = SSL_LIBRARY_VERSION_TLS_1_2;
1242 failf(data, "TLS minor version cannot be set");
1243 return CURLE_SSL_CONNECT_ERROR;
1246 CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex)
1248 PRErrorCode err = 0;
1249 PRFileDesc *model = NULL;
1250 PRBool ssl_no_cache;
1251 PRBool ssl_cbc_random_iv;
1252 struct SessionHandle *data = conn->data;
1253 curl_socket_t sockfd = conn->sock[sockindex];
1254 struct ssl_connect_data *connssl = &conn->ssl[sockindex];
1256 const int *cipher_to_enable;
1257 PRSocketOptionData sock_opt;
1261 SSLVersionRange sslver = {
1262 SSL_LIBRARY_VERSION_3_0, /* min */
1263 SSL_LIBRARY_VERSION_TLS_1_0 /* max */
1266 if(connssl->state == ssl_connection_complete)
1269 connssl->data = data;
1271 /* list of all NSS objects we need to destroy in Curl_nss_close() */
1272 connssl->obj_list = Curl_llist_alloc(nss_destroy_object);
1273 if(!connssl->obj_list)
1274 return CURLE_OUT_OF_MEMORY;
1276 /* FIXME. NSS doesn't support multiple databases open at the same time. */
1277 PR_Lock(nss_initlock);
1278 curlerr = nss_init(conn->data);
1279 if(CURLE_OK != curlerr) {
1280 PR_Unlock(nss_initlock);
1284 curlerr = CURLE_SSL_CONNECT_ERROR;
1287 char *configstring = aprintf("library=%s name=PEM", pem_library);
1289 PR_Unlock(nss_initlock);
1292 mod = SECMOD_LoadUserModule(configstring, NULL, PR_FALSE);
1295 if(!mod || !mod->loaded) {
1297 SECMOD_DestroyModule(mod);
1300 infof(data, "WARNING: failed to load NSS PEM library %s. Using "
1301 "OpenSSL PEM certificates will not work.\n", pem_library);
1305 PK11_SetPasswordFunc(nss_get_password);
1306 PR_Unlock(nss_initlock);
1308 model = PR_NewTCPSocket();
1311 model = SSL_ImportFD(NULL, model);
1313 if(SSL_OptionSet(model, SSL_SECURITY, PR_TRUE) != SECSuccess)
1315 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_SERVER, PR_FALSE) != SECSuccess)
1317 if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE) != SECSuccess)
1320 /* do not use SSL cache if disabled or we are not going to verify peer */
1321 ssl_no_cache = (conn->ssl_config.sessionid && data->set.ssl.verifypeer) ?
1323 if(SSL_OptionSet(model, SSL_NO_CACHE, ssl_no_cache) != SECSuccess)
1326 /* enable/disable the requested SSL version(s) */
1327 if(nss_init_sslver(&sslver, data) != CURLE_OK)
1329 if(SSL_VersionRangeSet(model, &sslver) != SECSuccess)
1332 ssl_cbc_random_iv = !data->set.ssl_enable_beast;
1333 #ifdef SSL_CBC_RANDOM_IV
1334 /* unless the user explicitly asks to allow the protocol vulnerability, we
1335 use the work-around */
1336 if(SSL_OptionSet(model, SSL_CBC_RANDOM_IV, ssl_cbc_random_iv) != SECSuccess)
1337 infof(data, "warning: failed to set SSL_CBC_RANDOM_IV = %d\n",
1340 if(ssl_cbc_random_iv)
1341 infof(data, "warning: support for SSL_CBC_RANDOM_IV not compiled in\n");
1344 /* reset the flag to avoid an infinite loop */
1345 data->state.ssl_connect_retry = FALSE;
1347 /* enable all ciphers from enable_ciphers_by_default */
1348 cipher_to_enable = enable_ciphers_by_default;
1349 while(SSL_NULL_WITH_NULL_NULL != *cipher_to_enable) {
1350 if(SSL_CipherPrefSet(model, *cipher_to_enable, PR_TRUE) != SECSuccess) {
1351 curlerr = CURLE_SSL_CIPHER;
1357 if(data->set.ssl.cipher_list) {
1358 if(set_ciphers(data, model, data->set.ssl.cipher_list) != SECSuccess) {
1359 curlerr = CURLE_SSL_CIPHER;
1364 if(!data->set.ssl.verifypeer && data->set.ssl.verifyhost)
1365 infof(data, "warning: ignoring value of ssl.verifyhost\n");
1367 /* bypass the default SSL_AuthCertificate() hook in case we do not want to
1369 if(SSL_AuthCertificateHook(model, nss_auth_cert_hook, conn) != SECSuccess)
1372 data->set.ssl.certverifyresult=0; /* not checked yet */
1373 if(SSL_BadCertHook(model, BadCertHandler, conn) != SECSuccess)
1376 if(SSL_HandshakeCallback(model, HandshakeCallback, NULL) != SECSuccess)
1379 if(data->set.ssl.verifypeer) {
1380 const CURLcode rv = nss_load_ca_certificates(conn, sockindex);
1381 if(CURLE_OK != rv) {
1387 if(data->set.ssl.CRLfile) {
1388 if(SECSuccess != nss_load_crl(data->set.ssl.CRLfile)) {
1389 curlerr = CURLE_SSL_CRL_BADFILE;
1394 data->set.ssl.CRLfile ? data->set.ssl.CRLfile : "none");
1397 if(data->set.str[STRING_CERT]) {
1398 char *nickname = dup_nickname(data, STRING_CERT);
1400 /* we are not going to use libnsspem.so to read the client cert */
1401 connssl->obj_clicert = NULL;
1404 CURLcode rv = cert_stuff(conn, sockindex, data->set.str[STRING_CERT],
1405 data->set.str[STRING_KEY]);
1406 if(CURLE_OK != rv) {
1407 /* failf() is already done in cert_stuff() */
1413 /* store the nickname for SelectClientCert() called during handshake */
1414 connssl->client_nickname = nickname;
1417 connssl->client_nickname = NULL;
1419 if(SSL_GetClientAuthDataHook(model, SelectClientCert,
1420 (void *)connssl) != SECSuccess) {
1421 curlerr = CURLE_SSL_CERTPROBLEM;
1425 /* Import our model socket onto the existing file descriptor */
1426 connssl->handle = PR_ImportTCPSocket(sockfd);
1427 connssl->handle = SSL_ImportFD(model, connssl->handle);
1428 if(!connssl->handle)
1431 PR_Close(model); /* We don't need this any more */
1434 /* This is the password associated with the cert that we're using */
1435 if(data->set.str[STRING_KEY_PASSWD]) {
1436 SSL_SetPKCS11PinArg(connssl->handle, data->set.str[STRING_KEY_PASSWD]);
1439 /* Force handshake on next I/O */
1440 SSL_ResetHandshake(connssl->handle, /* asServer */ PR_FALSE);
1442 SSL_SetURL(connssl->handle, conn->host.name);
1444 /* check timeout situation */
1445 time_left = Curl_timeleft(data, NULL, TRUE);
1446 if(time_left < 0L) {
1447 failf(data, "timed out before SSL handshake");
1448 curlerr = CURLE_OPERATION_TIMEDOUT;
1451 timeout = PR_MillisecondsToInterval((PRUint32) time_left);
1453 /* Force the handshake now */
1454 if(SSL_ForceHandshakeWithTimeout(connssl->handle, timeout) != SECSuccess) {
1455 if(conn->data->set.ssl.certverifyresult == SSL_ERROR_BAD_CERT_DOMAIN)
1456 curlerr = CURLE_PEER_FAILED_VERIFICATION;
1457 else if(conn->data->set.ssl.certverifyresult!=0)
1458 curlerr = CURLE_SSL_CACERT;
1462 /* switch the SSL socket into non-blocking mode */
1463 sock_opt.option = PR_SockOpt_Nonblocking;
1464 sock_opt.value.non_blocking = PR_TRUE;
1465 if(PR_SetSocketOption(connssl->handle, &sock_opt) != PR_SUCCESS)
1468 connssl->state = ssl_connection_complete;
1469 conn->recv[sockindex] = nss_recv;
1470 conn->send[sockindex] = nss_send;
1472 display_conn_info(conn, connssl->handle);
1474 if(data->set.str[STRING_SSL_ISSUERCERT]) {
1475 SECStatus ret = SECFailure;
1476 char *nickname = dup_nickname(data, STRING_SSL_ISSUERCERT);
1478 /* we support only nicknames in case of STRING_SSL_ISSUERCERT for now */
1479 ret = check_issuer_cert(connssl->handle, nickname);
1483 if(SECFailure == ret) {
1484 infof(data,"SSL certificate issuer check failed\n");
1485 curlerr = CURLE_SSL_ISSUER_ERROR;
1489 infof(data, "SSL certificate issuer check ok\n");
1496 /* reset the flag to avoid an infinite loop */
1497 data->state.ssl_connect_retry = FALSE;
1499 if(is_nss_error(curlerr)) {
1500 /* read NSPR error code */
1501 err = PR_GetError();
1502 if(is_cc_error(err))
1503 curlerr = CURLE_SSL_CERTPROBLEM;
1505 /* print the error number and error string */
1506 infof(data, "NSS error %d (%s)\n", err, nss_error_to_name(err));
1508 /* print a human-readable message describing the error if available */
1509 nss_print_error_message(data, err);
1515 /* cleanup on connection failure */
1516 Curl_llist_destroy(connssl->obj_list, NULL);
1517 connssl->obj_list = NULL;
1519 if((sslver.min == SSL_LIBRARY_VERSION_3_0)
1520 && (sslver.max == SSL_LIBRARY_VERSION_TLS_1_0)
1521 && isTLSIntoleranceError(err)) {
1522 /* schedule reconnect through Curl_retry_request() */
1523 data->state.ssl_connect_retry = TRUE;
1524 infof(data, "Error in TLS handshake, trying SSLv3...\n");
1531 static ssize_t nss_send(struct connectdata *conn, /* connection data */
1532 int sockindex, /* socketindex */
1533 const void *mem, /* send this data */
1534 size_t len, /* amount to write */
1537 ssize_t rc = PR_Send(conn->ssl[sockindex].handle, mem, (int)len, 0,
1538 PR_INTERVAL_NO_WAIT);
1540 PRInt32 err = PR_GetError();
1541 if(err == PR_WOULD_BLOCK_ERROR)
1542 *curlcode = CURLE_AGAIN;
1544 /* print the error number and error string */
1545 const char *err_name = nss_error_to_name(err);
1546 infof(conn->data, "SSL write: error %d (%s)\n", err, err_name);
1548 /* print a human-readable message describing the error if available */
1549 nss_print_error_message(conn->data, err);
1551 *curlcode = (is_cc_error(err))
1552 ? CURLE_SSL_CERTPROBLEM
1557 return rc; /* number of bytes */
1560 static ssize_t nss_recv(struct connectdata * conn, /* connection data */
1561 int num, /* socketindex */
1562 char *buf, /* store read data here */
1563 size_t buffersize, /* max amount to read */
1566 ssize_t nread = PR_Recv(conn->ssl[num].handle, buf, (int)buffersize, 0,
1567 PR_INTERVAL_NO_WAIT);
1569 /* failed SSL read */
1570 PRInt32 err = PR_GetError();
1572 if(err == PR_WOULD_BLOCK_ERROR)
1573 *curlcode = CURLE_AGAIN;
1575 /* print the error number and error string */
1576 const char *err_name = nss_error_to_name(err);
1577 infof(conn->data, "SSL read: errno %d (%s)\n", err, err_name);
1579 /* print a human-readable message describing the error if available */
1580 nss_print_error_message(conn->data, err);
1582 *curlcode = (is_cc_error(err))
1583 ? CURLE_SSL_CERTPROBLEM
1591 size_t Curl_nss_version(char *buffer, size_t size)
1593 return snprintf(buffer, size, "NSS/%s", NSS_VERSION);
1596 int Curl_nss_seed(struct SessionHandle *data)
1598 /* make sure that NSS is initialized */
1599 return !!Curl_nss_force_init(data);
1602 void Curl_nss_random(struct SessionHandle *data,
1603 unsigned char *entropy,
1606 Curl_nss_seed(data); /* Initiate the seed if not already done */
1607 if(SECSuccess != PK11_GenerateRandom(entropy, curlx_uztosi(length))) {
1608 /* no way to signal a failure from here, we have to abort */
1609 failf(data, "PK11_GenerateRandom() failed, calling abort()...");
1614 void Curl_nss_md5sum(unsigned char *tmp, /* input */
1616 unsigned char *md5sum, /* output */
1619 PK11Context *MD5pw = PK11_CreateDigestContext(SEC_OID_MD5);
1620 unsigned int MD5out;
1621 PK11_DigestOp(MD5pw, tmp, curlx_uztoui(tmplen));
1622 PK11_DigestFinal(MD5pw, md5sum, &MD5out, curlx_uztoui(md5len));
1623 PK11_DestroyContext(MD5pw, PR_TRUE);
1626 #endif /* USE_NSS */