diff options
Diffstat (limited to 'Utilities/cmcurl-7.19.0/lib/nss.c')
| -rw-r--r-- | Utilities/cmcurl-7.19.0/lib/nss.c | 1271 |
1 files changed, 1271 insertions, 0 deletions
diff --git a/Utilities/cmcurl-7.19.0/lib/nss.c b/Utilities/cmcurl-7.19.0/lib/nss.c new file mode 100644 index 0000000..b6ed59c --- /dev/null +++ b/Utilities/cmcurl-7.19.0/lib/nss.c @@ -0,0 +1,1271 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al. + * + * This software is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at http://curl.haxx.se/docs/copyright.html. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the COPYING file. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + * $Id$ + ***************************************************************************/ + +/* + * Source file for all NSS-specific code for the TLS/SSL layer. No code + * but sslgen.c should ever call or use these functions. + */ + +#include "setup.h" + +#include <string.h> +#include <stdlib.h> +#include <ctype.h> +#ifdef HAVE_SYS_SOCKET_H +#include <sys/socket.h> +#endif + +#include "urldata.h" +#include "sendf.h" +#include "formdata.h" /* for the boundary function */ +#include "url.h" /* for the ssl config check function */ +#include "connect.h" +#include "strequal.h" +#include "select.h" +#include "sslgen.h" +#include "strequal.h" + +#define _MPRINTF_REPLACE /* use the internal *printf() functions */ +#include <curl/mprintf.h> + +#ifdef USE_NSS + +#include "nssg.h" +#include <nspr.h> +#include <nss.h> +#include <ssl.h> +#include <sslerr.h> +#include <secerr.h> +#include <secmod.h> +#include <sslproto.h> +#include <prtypes.h> +#include <pk11pub.h> +#include <prio.h> +#include <secitem.h> +#include <secport.h> +#include <certdb.h> + +#include "memory.h" +#include "easyif.h" /* for Curl_convert_from_utf8 prototype */ + +/* The last #include file should be: */ +#include "memdebug.h" + +#define SSL_DIR "/etc/pki/nssdb" + +/* enough to fit the string "PEM Token #[0|1]" */ +#define SLOTSIZE 13 + +PRFileDesc *PR_ImportTCPSocket(PRInt32 osfd); + +int initialized = 0; + +#define HANDSHAKE_TIMEOUT 30 + +typedef struct { + PRInt32 retryCount; + struct SessionHandle *data; +} pphrase_arg_t; + +typedef struct { + const char *name; + int num; + PRInt32 version; /* protocol version valid for this cipher */ +} cipher_s; + +#define PK11_SETATTRS(x,id,v,l) (x)->type = (id); \ + (x)->pValue=(v); (x)->ulValueLen = (l) + +#define CERT_NewTempCertificate __CERT_NewTempCertificate + +enum sslversion { SSL2 = 1, SSL3 = 2, TLS = 4 }; + +#define NUM_OF_CIPHERS sizeof(cipherlist)/sizeof(cipherlist[0]) +static const cipher_s cipherlist[] = { + /* SSL2 cipher suites */ + {"rc4", SSL_EN_RC4_128_WITH_MD5, SSL2}, + {"rc4-md5", SSL_EN_RC4_128_WITH_MD5, SSL2}, + {"rc4export", SSL_EN_RC4_128_EXPORT40_WITH_MD5, SSL2}, + {"rc2", SSL_EN_RC2_128_CBC_WITH_MD5, SSL2}, + {"rc2export", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5, SSL2}, + {"des", SSL_EN_DES_64_CBC_WITH_MD5, SSL2}, + {"desede3", SSL_EN_DES_192_EDE3_CBC_WITH_MD5, SSL2}, + /* SSL3/TLS cipher suites */ + {"rsa_rc4_128_md5", SSL_RSA_WITH_RC4_128_MD5, SSL3 | TLS}, + {"rsa_rc4_128_sha", SSL_RSA_WITH_RC4_128_SHA, SSL3 | TLS}, + {"rsa_3des_sha", SSL_RSA_WITH_3DES_EDE_CBC_SHA, SSL3 | TLS}, + {"rsa_des_sha", SSL_RSA_WITH_DES_CBC_SHA, SSL3 | TLS}, + {"rsa_rc4_40_md5", SSL_RSA_EXPORT_WITH_RC4_40_MD5, SSL3 | TLS}, + {"rsa_rc2_40_md5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5, SSL3 | TLS}, + {"rsa_null_md5", SSL_RSA_WITH_NULL_MD5, SSL3 | TLS}, + {"rsa_null_sha", SSL_RSA_WITH_NULL_SHA, SSL3 | TLS}, + {"fips_3des_sha", SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA, SSL3 | TLS}, + {"fips_des_sha", SSL_RSA_FIPS_WITH_DES_CBC_SHA, SSL3 | TLS}, + {"fortezza", SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA, SSL3 | TLS}, + {"fortezza_rc4_128_sha", SSL_FORTEZZA_DMS_WITH_RC4_128_SHA, SSL3 | TLS}, + {"fortezza_null", SSL_FORTEZZA_DMS_WITH_NULL_SHA, SSL3 | TLS}, + /* TLS 1.0: Exportable 56-bit Cipher Suites. */ + {"rsa_des_56_sha", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA, SSL3 | TLS}, + {"rsa_rc4_56_sha", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA, SSL3 | TLS}, + /* AES ciphers. */ + {"rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA, SSL3 | TLS}, + {"rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA, SSL3 | TLS}, +#ifdef NSS_ENABLE_ECC + /* ECC ciphers. */ + {"ecdh_ecdsa_null_sha", TLS_ECDH_ECDSA_WITH_NULL_SHA, TLS}, + {"ecdh_ecdsa_rc4_128_sha", TLS_ECDH_ECDSA_WITH_RC4_128_SHA, TLS}, + {"ecdh_ecdsa_3des_sha", TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS}, + {"ecdh_ecdsa_aes_128_sha", TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS}, + {"ecdh_ecdsa_aes_256_sha", TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, TLS}, + {"ecdhe_ecdsa_null_sha", TLS_ECDHE_ECDSA_WITH_NULL_SHA, TLS}, + {"ecdhe_ecdsa_rc4_128_sha", TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, TLS}, + {"ecdhe_ecdsa_3des_sha", TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS}, + {"ecdhe_ecdsa_aes_128_sha", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS}, + {"ecdhe_ecdsa_aes_256_sha", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS}, + {"ecdh_rsa_null_sha", TLS_ECDH_RSA_WITH_NULL_SHA, TLS}, + {"ecdh_rsa_128_sha", TLS_ECDH_RSA_WITH_RC4_128_SHA, TLS}, + {"ecdh_rsa_3des_sha", TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, TLS}, + {"ecdh_rsa_aes_128_sha", TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS}, + {"ecdh_rsa_aes_256_sha", TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, TLS}, + {"echde_rsa_null", TLS_ECDHE_RSA_WITH_NULL_SHA, TLS}, + {"ecdhe_rsa_rc4_128_sha", TLS_ECDHE_RSA_WITH_RC4_128_SHA, TLS}, + {"ecdhe_rsa_3des_sha", TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, TLS}, + {"ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS}, + {"ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS}, + {"ecdh_anon_null_sha", TLS_ECDH_anon_WITH_NULL_SHA, TLS}, + {"ecdh_anon_rc4_128sha", TLS_ECDH_anon_WITH_RC4_128_SHA, TLS}, + {"ecdh_anon_3des_sha", TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA, TLS}, + {"ecdh_anon_aes_128_sha", TLS_ECDH_anon_WITH_AES_128_CBC_SHA, TLS}, + {"ecdh_anon_aes_256_sha", TLS_ECDH_anon_WITH_AES_256_CBC_SHA, TLS}, +#endif +}; + +#ifdef HAVE_PK11_CREATEGENERICOBJECT +static const char* pem_library = "libnsspem.so"; +#endif +SECMODModule* mod = NULL; + +static SECStatus set_ciphers(struct SessionHandle *data, PRFileDesc * model, + char *cipher_list) +{ + unsigned int i; + PRBool cipher_state[NUM_OF_CIPHERS]; + PRBool found; + char *cipher; + SECStatus rv; + + /* First disable all ciphers. This uses a different max value in case + * NSS adds more ciphers later we don't want them available by + * accident + */ + for(i=0; i<SSL_NumImplementedCiphers; i++) { + SSL_CipherPrefSet(model, SSL_ImplementedCiphers[i], SSL_NOT_ALLOWED); + } + + /* Set every entry in our list to false */ + for(i=0; i<NUM_OF_CIPHERS; i++) { + cipher_state[i] = PR_FALSE; + } + + cipher = cipher_list; + + while(cipher_list && (cipher_list[0])) { + while((*cipher) && (ISSPACE(*cipher))) + ++cipher; + + if((cipher_list = strchr(cipher, ','))) { + *cipher_list++ = '\0'; + } + + found = PR_FALSE; + + for(i=0; i<NUM_OF_CIPHERS; i++) { + if(strequal(cipher, cipherlist[i].name)) { + cipher_state[i] = PR_TRUE; + found = PR_TRUE; + break; + } + } + + if(found == PR_FALSE) { + failf(data, "Unknown cipher in list: %s", cipher); + return SECFailure; + } + + if(cipher_list) { + cipher = cipher_list; + } + } + + /* Finally actually enable the selected ciphers */ + for(i=0; i<NUM_OF_CIPHERS; i++) { + rv = SSL_CipherPrefSet(model, cipherlist[i].num, cipher_state[i]); + if(rv != SECSuccess) { + failf(data, "Unknown cipher in cipher list"); + return SECFailure; + } + } + + return SECSuccess; +} + +/* + * Determine whether the nickname passed in is a filename that needs to + * be loaded as a PEM or a regular NSS nickname. + * + * returns 1 for a file + * returns 0 for not a file (NSS nickname) + */ +static int is_file(const char *filename) +{ + struct stat st; + + if(filename == NULL) + return 0; + + if(stat(filename, &st) == 0) + if(S_ISREG(st.st_mode)) + return 1; + + return 0; +} + +static int +nss_load_cert(const char *filename, PRBool cacert) +{ +#ifdef HAVE_PK11_CREATEGENERICOBJECT + CK_SLOT_ID slotID; + PK11SlotInfo * slot = NULL; + PK11GenericObject *rv; + CK_ATTRIBUTE *attrs; + CK_ATTRIBUTE theTemplate[20]; + CK_BBOOL cktrue = CK_TRUE; + CK_BBOOL ckfalse = CK_FALSE; + CK_OBJECT_CLASS objClass = CKO_CERTIFICATE; + char *slotname = NULL; +#endif + CERTCertificate *cert; + char *nickname = NULL; + char *n = NULL; + + /* If there is no slash in the filename it is assumed to be a regular + * NSS nickname. + */ + if(is_file(filename)) { + n = strrchr(filename, '/'); + if(n) + n++; + if(!mod) + return 1; + } + else { + /* A nickname from the NSS internal database */ + if(cacert) + return 0; /* You can't specify an NSS CA nickname this way */ + nickname = strdup(filename); + goto done; + } + +#ifdef HAVE_PK11_CREATEGENERICOBJECT + attrs = theTemplate; + + /* All CA and trust objects go into slot 0. Other slots are used + * for storing certificates. With each new user certificate we increment + * the slot count. We only support 1 user certificate right now. + */ + if(cacert) + slotID = 0; + else + slotID = 1; + + slotname = (char *)malloc(SLOTSIZE); + nickname = (char *)malloc(PATH_MAX); + snprintf(slotname, SLOTSIZE, "PEM Token #%ld", slotID); + snprintf(nickname, PATH_MAX, "PEM Token #%ld:%s", slotID, n); + + slot = PK11_FindSlotByName(slotname); + + if(!slot) { + free(slotname); + free(nickname); + return 0; + } + + PK11_SETATTRS(attrs, CKA_CLASS, &objClass, sizeof(objClass) ); + attrs++; + PK11_SETATTRS(attrs, CKA_TOKEN, &cktrue, sizeof(CK_BBOOL) ); + attrs++; + PK11_SETATTRS(attrs, CKA_LABEL, (unsigned char *)filename, + strlen(filename)+1); + attrs++; + if(cacert) { + PK11_SETATTRS(attrs, CKA_TRUST, &cktrue, sizeof(CK_BBOOL) ); + } + else { + PK11_SETATTRS(attrs, CKA_TRUST, &ckfalse, sizeof(CK_BBOOL) ); + } + attrs++; + + /* This load the certificate in our PEM module into the appropriate + * slot. + */ + rv = PK11_CreateGenericObject(slot, theTemplate, 4, PR_FALSE /* isPerm */); + + PK11_FreeSlot(slot); + + free(slotname); + if(rv == NULL) { + free(nickname); + return 0; + } +#else + /* We don't have PK11_CreateGenericObject but a file-based cert was passed + * in. We need to fail. + */ + return 0; +#endif + +done: + /* Double-check that the certificate or nickname requested exists in + * either the token or the NSS certificate database. + */ + if(!cacert) { + cert = PK11_FindCertFromNickname((char *)nickname, NULL); + + /* An invalid nickname was passed in */ + if(cert == NULL) { + free(nickname); + PR_SetError(SEC_ERROR_UNKNOWN_CERT, 0); + return 0; + } + + CERT_DestroyCertificate(cert); + } + + free(nickname); + + return 1; +} + +static int nss_load_crl(char* crlfilename, PRBool ascii) +{ + PRFileDesc *infile; + PRStatus prstat; + PRFileInfo info; + PRInt32 nb; + int rv; + SECItem crlDER; + CERTSignedCrl *crl=NULL; + PK11SlotInfo *slot=NULL; + + infile = PR_Open(crlfilename,PR_RDONLY,0); + if (!infile) { + return 0; + } + crlDER.data = NULL; + prstat = PR_GetOpenFileInfo(infile,&info); + if (prstat!=PR_SUCCESS) + return 0; + if (ascii) { + SECItem filedata; + char *asc,*body; + filedata.data = NULL; + if (!SECITEM_AllocItem(NULL,&filedata,info.size)) + return 0; + nb = PR_Read(infile,filedata.data,info.size); + if (nb!=info.size) + return 0; + asc = (char*)filedata.data; + if (!asc) + return 0; + + body=strstr(asc,"-----BEGIN"); + if (body != NULL) { + char *trailer=NULL; + asc = body; + body = PORT_Strchr(asc,'\n'); + if (!body) + body = PORT_Strchr(asc,'\r'); + if (body) + trailer = strstr(++body,"-----END"); + if (trailer!=NULL) + *trailer='\0'; + else + return 0; + } + else { + body = asc; + } + rv = ATOB_ConvertAsciiToItem(&crlDER,body); + PORT_Free(filedata.data); + if (rv) + return 0; + } + else { + if (!SECITEM_AllocItem(NULL,&crlDER,info.size)) + return 0; + nb = PR_Read(infile,crlDER.data,info.size); + if (nb!=info.size) + return 0; + } + + slot = PK11_GetInternalKeySlot(); + crl = PK11_ImportCRL(slot,&crlDER, + NULL,SEC_CRL_TYPE, + NULL,CRL_IMPORT_DEFAULT_OPTIONS, + NULL,(CRL_DECODE_DEFAULT_OPTIONS| + CRL_DECODE_DONT_COPY_DER)); + if (slot) PK11_FreeSlot(slot); + if (!crl) return 0; + SEC_DestroyCrl(crl); + return 1; +} + +static int nss_load_key(struct connectdata *conn, char *key_file) +{ +#ifdef HAVE_PK11_CREATEGENERICOBJECT + PK11SlotInfo * slot = NULL; + PK11GenericObject *rv; + CK_ATTRIBUTE *attrs; + CK_ATTRIBUTE theTemplate[20]; + CK_BBOOL cktrue = CK_TRUE; + CK_OBJECT_CLASS objClass = CKO_PRIVATE_KEY; + CK_SLOT_ID slotID; + char *slotname = NULL; + pphrase_arg_t *parg = NULL; + + attrs = theTemplate; + + /* FIXME: grok the various file types */ + + slotID = 1; /* hardcoded for now */ + + slotname = (char *)malloc(SLOTSIZE); + snprintf(slotname, SLOTSIZE, "PEM Token #%ld", slotID); + + slot = PK11_FindSlotByName(slotname); + free(slotname); + + if(!slot) + return 0; + + PK11_SETATTRS(attrs, CKA_CLASS, &objClass, sizeof(objClass) ); attrs++; + PK11_SETATTRS(attrs, CKA_TOKEN, &cktrue, sizeof(CK_BBOOL) ); attrs++; + PK11_SETATTRS(attrs, CKA_LABEL, (unsigned char *)key_file, + strlen(key_file)+1); attrs++; + + /* When adding an encrypted key the PKCS#11 will be set as removed */ + rv = PK11_CreateGenericObject(slot, theTemplate, 3, PR_FALSE /* isPerm */); + if(rv == NULL) { + PR_SetError(SEC_ERROR_BAD_KEY, 0); + return 0; + } + + /* This will force the token to be seen as re-inserted */ + SECMOD_WaitForAnyTokenEvent(mod, 0, 0); + PK11_IsPresent(slot); + + parg = (pphrase_arg_t *) malloc(sizeof(*parg)); + parg->retryCount = 0; + parg->data = conn->data; + /* parg is initialized in nss_Init_Tokens() */ + if(PK11_Authenticate(slot, PR_TRUE, parg) != SECSuccess) { + free(parg); + return 0; + } + free(parg); + + return 1; +#else + /* If we don't have PK11_CreateGenericObject then we can't load a file-based + * key. + */ + (void)conn; /* unused */ + (void)key_file; /* unused */ + return 0; +#endif +} + +static int display_error(struct connectdata *conn, PRInt32 err, + const char *filename) +{ + switch(err) { + case SEC_ERROR_BAD_PASSWORD: + failf(conn->data, "Unable to load client key: Incorrect password"); + return 1; + case SEC_ERROR_UNKNOWN_CERT: + failf(conn->data, "Unable to load certificate %s", filename); + return 1; + default: + break; + } + return 0; /* The caller will print a generic error */ +} + +static int cert_stuff(struct connectdata *conn, char *cert_file, char *key_file) +{ + struct SessionHandle *data = conn->data; + int rv = 0; + + if(cert_file) { + rv = nss_load_cert(cert_file, PR_FALSE); + if(!rv) { + if(!display_error(conn, PR_GetError(), cert_file)) + failf(data, "Unable to load client cert %d.", PR_GetError()); + return 0; + } + } + if(key_file || (is_file(cert_file))) { + if(key_file) + rv = nss_load_key(conn, key_file); + else + /* In case the cert file also has the key */ + rv = nss_load_key(conn, cert_file); + if(!rv) { + if(!display_error(conn, PR_GetError(), key_file)) + failf(data, "Unable to load client key %d.", PR_GetError()); + + return 0; + } + } + return 1; +} + +static char * nss_get_password(PK11SlotInfo * slot, PRBool retry, void *arg) +{ + pphrase_arg_t *parg; + parg = (pphrase_arg_t *) arg; + + (void)slot; /* unused */ + if(retry > 2) + return NULL; + if(parg->data->set.str[STRING_KEY_PASSWD]) + return (char *)PORT_Strdup((char *)parg->data->set.str[STRING_KEY_PASSWD]); + else + return NULL; +} + +/* No longer ask for the password, parg has been freed */ +static char * nss_no_password(PK11SlotInfo *slot, PRBool retry, void *arg) +{ + (void)slot; /* unused */ + (void)retry; /* unused */ + (void)arg; /* unused */ + return NULL; +} + +static SECStatus nss_Init_Tokens(struct connectdata * conn) +{ + PK11SlotList *slotList; + PK11SlotListElement *listEntry; + SECStatus ret, status = SECSuccess; + pphrase_arg_t *parg = NULL; + + parg = (pphrase_arg_t *) malloc(sizeof(*parg)); + parg->retryCount = 0; + parg->data = conn->data; + + PK11_SetPasswordFunc(nss_get_password); + + slotList = + PK11_GetAllTokens(CKM_INVALID_MECHANISM, PR_FALSE, PR_TRUE, NULL); + + for(listEntry = PK11_GetFirstSafe(slotList); + listEntry; listEntry = listEntry->next) { + PK11SlotInfo *slot = listEntry->slot; + + if(PK11_NeedLogin(slot) && PK11_NeedUserInit(slot)) { + if(slot == PK11_GetInternalKeySlot()) { + failf(conn->data, "The NSS database has not been initialized"); + } + else { + failf(conn->data, "The token %s has not been initialized", + PK11_GetTokenName(slot)); + } + PK11_FreeSlot(slot); + continue; + } + + ret = PK11_Authenticate(slot, PR_TRUE, parg); + if(SECSuccess != ret) { + if(PR_GetError() == SEC_ERROR_BAD_PASSWORD) + infof(conn->data, "The password for token '%s' is incorrect\n", + PK11_GetTokenName(slot)); + status = SECFailure; + break; + } + parg->retryCount = 0; /* reset counter to 0 for the next token */ + PK11_FreeSlot(slot); + } + + free(parg); + + return status; +} + +static SECStatus BadCertHandler(void *arg, PRFileDesc *sock) +{ + SECStatus success = SECSuccess; + struct connectdata *conn = (struct connectdata *)arg; + PRErrorCode err = PR_GetError(); + CERTCertificate *cert = NULL; + char *subject, *issuer; + + if(conn->data->set.ssl.certverifyresult!=0) + return success; + + conn->data->set.ssl.certverifyresult=err; + cert = SSL_PeerCertificate(sock); + subject = CERT_NameToAscii(&cert->subject); + issuer = CERT_NameToAscii(&cert->issuer); + CERT_DestroyCertificate(cert); + + switch(err) { + case SEC_ERROR_CA_CERT_INVALID: + infof(conn->data, "Issuer certificate is invalid: '%s'\n", issuer); + if(conn->data->set.ssl.verifypeer) + success = SECFailure; + break; + case SEC_ERROR_UNTRUSTED_ISSUER: + if(conn->data->set.ssl.verifypeer) + success = SECFailure; + infof(conn->data, "Certificate is signed by an untrusted issuer: '%s'\n", + issuer); + break; + case SSL_ERROR_BAD_CERT_DOMAIN: + if(conn->data->set.ssl.verifypeer) + success = SECFailure; + infof(conn->data, "common name: %s (does not match '%s')\n", + subject, conn->host.dispname); + break; + case SEC_ERROR_EXPIRED_CERTIFICATE: + if(conn->data->set.ssl.verifypeer) + success = SECFailure; + infof(conn->data, "Remote Certificate has expired.\n"); + break; + default: + if(conn->data->set.ssl.verifypeer) + success = SECFailure; + infof(conn->data, "Bad certificate received. Subject = '%s', " + "Issuer = '%s'\n", subject, issuer); + break; + } + if(success == SECSuccess) + infof(conn->data, "SSL certificate verify ok.\n"); + PR_Free(subject); + PR_Free(issuer); + + return success; +} + +/** + * Inform the application that the handshake is complete. + */ +static SECStatus HandshakeCallback(PRFileDesc *sock, void *arg) +{ + (void)sock; + (void)arg; + return SECSuccess; +} + +static void display_conn_info(struct connectdata *conn, PRFileDesc *sock) +{ + SSLChannelInfo channel; + SSLCipherSuiteInfo suite; + CERTCertificate *cert; + char *subject, *issuer, *common_name; + PRExplodedTime printableTime; + char timeString[256]; + PRTime notBefore, notAfter; + + if(SSL_GetChannelInfo(sock, &channel, sizeof channel) == + SECSuccess && channel.length == sizeof channel && + channel.cipherSuite) { + if(SSL_GetCipherSuiteInfo(channel.cipherSuite, + &suite, sizeof suite) == SECSuccess) { + infof(conn->data, "SSL connection using %s\n", suite.cipherSuiteName); + } + } + + infof(conn->data, "Server certificate:\n"); + + cert = SSL_PeerCertificate(sock); + subject = CERT_NameToAscii(&cert->subject); + issuer = CERT_NameToAscii(&cert->issuer); + common_name = CERT_GetCommonName(&cert->subject); + infof(conn->data, "\tsubject: %s\n", subject); + + CERT_GetCertTimes(cert, ¬Before, ¬After); + PR_ExplodeTime(notBefore, PR_GMTParameters, &printableTime); + PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime); + infof(conn->data, "\tstart date: %s\n", timeString); + PR_ExplodeTime(notAfter, PR_GMTParameters, &printableTime); + PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime); + infof(conn->data, "\texpire date: %s\n", timeString); + infof(conn->data, "\tcommon name: %s\n", common_name); + infof(conn->data, "\tissuer: %s\n", issuer); + + PR_Free(subject); + PR_Free(issuer); + PR_Free(common_name); + + CERT_DestroyCertificate(cert); + + return; +} + +/** + * + * Check that the Peer certificate's issuer certificate matches the one found + * by issuer_nickname. This is not exactly the way OpenSSL and GNU TLS do the + * issuer check, so we provide comments that mimic the OpenSSL + * X509_check_issued function (in x509v3/v3_purp.c) + */ +static SECStatus check_issuer_cert(PRFileDesc *sock, + char* issuer_nickname) +{ + CERTCertificate *cert,*cert_issuer,*issuer; + SECStatus res=SECSuccess; + void *proto_win = NULL; + + /* + PRArenaPool *tmpArena = NULL; + CERTAuthKeyID *authorityKeyID = NULL; + SECITEM *caname = NULL; + */ + + cert = SSL_PeerCertificate(sock); + cert_issuer = CERT_FindCertIssuer(cert,PR_Now(),certUsageObjectSigner); + + proto_win = SSL_RevealPinArg(sock); + issuer = NULL; + issuer = PK11_FindCertFromNickname(issuer_nickname, proto_win); + + if ((!cert_issuer) || (!issuer)) + res = SECFailure; + else if (SECITEM_CompareItem(&cert_issuer->derCert, + &issuer->derCert)!=SECEqual) + res = SECFailure; + + CERT_DestroyCertificate(cert); + CERT_DestroyCertificate(issuer); + CERT_DestroyCertificate(cert_issuer); + return res; +} + +/** + * + * Callback to pick the SSL client certificate. + */ +static SECStatus SelectClientCert(void *arg, PRFileDesc *sock, + struct CERTDistNamesStr *caNames, + struct CERTCertificateStr **pRetCert, + struct SECKEYPrivateKeyStr **pRetKey) +{ + CERTCertificate *cert; + SECKEYPrivateKey *privKey; + char *nickname = (char *)arg; + void *proto_win = NULL; + SECStatus secStatus = SECFailure; + PK11SlotInfo *slot; + (void)caNames; + + proto_win = SSL_RevealPinArg(sock); + + if(!nickname) + return secStatus; + + cert = PK11_FindCertFromNickname(nickname, proto_win); + if(cert) { + + if(!strncmp(nickname, "PEM Token", 9)) { + CK_SLOT_ID slotID = 1; /* hardcoded for now */ + char * slotname = (char *)malloc(SLOTSIZE); + snprintf(slotname, SLOTSIZE, "PEM Token #%ld", slotID); + slot = PK11_FindSlotByName(slotname); + privKey = PK11_FindPrivateKeyFromCert(slot, cert, NULL); + PK11_FreeSlot(slot); + free(slotname); + if(privKey) { + secStatus = SECSuccess; + } + } + else { + privKey = PK11_FindKeyByAnyCert(cert, proto_win); + if(privKey) + secStatus = SECSuccess; + } + } + + if(secStatus == SECSuccess) { + *pRetCert = cert; + *pRetKey = privKey; + } + else { + if(cert) + CERT_DestroyCertificate(cert); + } + + return secStatus; +} + +/** + * Global SSL init + * + * @retval 0 error initializing SSL + * @retval 1 SSL initialized successfully + */ +int Curl_nss_init(void) +{ + if(!initialized) + PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256); + + /* We will actually initialize NSS later */ + + return 1; +} + +/* Global cleanup */ +void Curl_nss_cleanup(void) +{ + NSS_Shutdown(); + initialized = 0; +} + +/* + * This function uses SSL_peek to determine connection status. + * + * Return codes: + * 1 means the connection is still in place + * 0 means the connection has been closed + * -1 means the connection status is unknown + */ +int +Curl_nss_check_cxn(struct connectdata *conn) +{ + int rc; + char buf; + + rc = + PR_Recv(conn->ssl[FIRSTSOCKET].handle, (void *)&buf, 1, PR_MSG_PEEK, + PR_SecondsToInterval(1)); + if(rc > 0) + return 1; /* connection still in place */ + + if(rc == 0) + return 0; /* connection has been closed */ + + return -1; /* connection status unknown */ +} + +/* + * This function is called when an SSL connection is closed. + */ +void Curl_nss_close(struct connectdata *conn, int sockindex) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + + if(connssl->handle) { + PR_Close(connssl->handle); + if(connssl->client_nickname != NULL) { + free(connssl->client_nickname); + connssl->client_nickname = NULL; + } + connssl->handle = NULL; + } +} + +/* + * This function is called when the 'data' struct is going away. Close + * down everything and free all resources! + */ +int Curl_nss_close_all(struct SessionHandle *data) +{ + (void)data; + return 0; +} + +CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex) +{ + PRInt32 err; + PRFileDesc *model = NULL; + PRBool ssl2, ssl3, tlsv1; + struct SessionHandle *data = conn->data; + curl_socket_t sockfd = conn->sock[sockindex]; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + SECStatus rv; +#ifdef HAVE_PK11_CREATEGENERICOBJECT + char *configstring = NULL; +#endif + char *certDir = NULL; + int curlerr; + + curlerr = CURLE_SSL_CONNECT_ERROR; + + if (connssl->state == ssl_connection_complete) + return CURLE_OK; + + /* FIXME. NSS doesn't support multiple databases open at the same time. */ + if(!initialized) { + initialized = 1; + + certDir = getenv("SSL_DIR"); /* Look in $SSL_DIR */ + + if(!certDir) { + struct stat st; + + if(stat(SSL_DIR, &st) == 0) + if(S_ISDIR(st.st_mode)) { + certDir = (char *)SSL_DIR; + } + } + + if(!certDir) { + rv = NSS_NoDB_Init(NULL); + } + else { + rv = NSS_Initialize(certDir, NULL, NULL, "secmod.db", + NSS_INIT_READONLY); + } + if(rv != SECSuccess) { + infof(conn->data, "Unable to initialize NSS database\n"); + curlerr = CURLE_SSL_CACERT_BADFILE; + goto error; + } + + NSS_SetDomesticPolicy(); + +#ifdef HAVE_PK11_CREATEGENERICOBJECT + configstring = (char *)malloc(PATH_MAX); + + PR_snprintf(configstring, PATH_MAX, "library=%s name=PEM", pem_library); + + mod = SECMOD_LoadUserModule(configstring, NULL, PR_FALSE); + free(configstring); + if(!mod || !mod->loaded) { + if(mod) { + SECMOD_DestroyModule(mod); + mod = NULL; + } + infof(data, "WARNING: failed to load NSS PEM library %s. Using OpenSSL " + "PEM certificates will not work.\n", pem_library); + } +#endif + } + + model = PR_NewTCPSocket(); + if(!model) + goto error; + model = SSL_ImportFD(NULL, model); + + if(SSL_OptionSet(model, SSL_SECURITY, PR_TRUE) != SECSuccess) + goto error; + if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_SERVER, PR_FALSE) != SECSuccess) + goto error; + if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE) != SECSuccess) + goto error; + + ssl2 = ssl3 = tlsv1 = PR_FALSE; + + switch (data->set.ssl.version) { + default: + case CURL_SSLVERSION_DEFAULT: + ssl3 = tlsv1 = PR_TRUE; + break; + case CURL_SSLVERSION_TLSv1: + tlsv1 = PR_TRUE; + break; + case CURL_SSLVERSION_SSLv2: + ssl2 = PR_TRUE; + break; + case CURL_SSLVERSION_SSLv3: + ssl3 = PR_TRUE; + break; + } + + if(SSL_OptionSet(model, SSL_ENABLE_SSL2, ssl2) != SECSuccess) + goto error; + if(SSL_OptionSet(model, SSL_ENABLE_SSL3, ssl3) != SECSuccess) + goto error; + if(SSL_OptionSet(model, SSL_ENABLE_TLS, tlsv1) != SECSuccess) + goto error; + + if(SSL_OptionSet(model, SSL_V2_COMPATIBLE_HELLO, ssl2) != SECSuccess) + goto error; + + if(data->set.ssl.cipher_list) { + if(set_ciphers(data, model, data->set.ssl.cipher_list) != SECSuccess) { + curlerr = CURLE_SSL_CIPHER; + goto error; + } + } + + data->set.ssl.certverifyresult=0; /* not checked yet */ + if(SSL_BadCertHook(model, (SSLBadCertHandler) BadCertHandler, conn) + != SECSuccess) { + goto error; + } + if(SSL_HandshakeCallback(model, (SSLHandshakeCallback) HandshakeCallback, + NULL) != SECSuccess) + goto error; + + if(!data->set.ssl.verifypeer) + /* skip the verifying of the peer */ + ; + else if(data->set.ssl.CAfile) { + int rc = nss_load_cert(data->set.ssl.CAfile, PR_TRUE); + if(!rc) { + curlerr = CURLE_SSL_CACERT_BADFILE; + goto error; + } + } + else if(data->set.ssl.CApath) { + struct stat st; + PRDir *dir; + PRDirEntry *entry; + + if(stat(data->set.ssl.CApath, &st) == -1) { + curlerr = CURLE_SSL_CACERT_BADFILE; + goto error; + } + + if(S_ISDIR(st.st_mode)) { + int rc; + + dir = PR_OpenDir(data->set.ssl.CApath); + do { + entry = PR_ReadDir(dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN); + + if(entry) { + char fullpath[PATH_MAX]; + + snprintf(fullpath, sizeof(fullpath), "%s/%s", data->set.ssl.CApath, + entry->name); + rc = nss_load_cert(fullpath, PR_TRUE); + /* FIXME: check this return value! */ + } + /* This is purposefully tolerant of errors so non-PEM files + * can be in the same directory */ + } while(entry != NULL); + PR_CloseDir(dir); + } + } + infof(data, + " CAfile: %s\n" + " CApath: %s\n", + data->set.ssl.CAfile ? data->set.ssl.CAfile : "none", + data->set.ssl.CApath ? data->set.ssl.CApath : "none"); + + if (data->set.ssl.CRLfile) { + int rc = nss_load_crl(data->set.ssl.CRLfile, PR_FALSE); + if (!rc) { + curlerr = CURLE_SSL_CRL_BADFILE; + goto error; + } + infof(data, + " CRLfile: %s\n", + data->set.ssl.CRLfile ? data->set.ssl.CRLfile : "none"); + } + + if(data->set.str[STRING_CERT]) { + char *n; + char *nickname; + + nickname = (char *)malloc(PATH_MAX); + if(is_file(data->set.str[STRING_CERT])) { + n = strrchr(data->set.str[STRING_CERT], '/'); + if(n) { + n++; /* skip last slash */ + snprintf(nickname, PATH_MAX, "PEM Token #%ld:%s", 1, n); + } + } + else { + strncpy(nickname, data->set.str[STRING_CERT], PATH_MAX); + nickname[PATH_MAX-1]=0; /* make sure this is zero terminated */ + } + if(nss_Init_Tokens(conn) != SECSuccess) { + free(nickname); + goto error; + } + if(!cert_stuff(conn, data->set.str[STRING_CERT], + data->set.str[STRING_KEY])) { + /* failf() is already done in cert_stuff() */ + free(nickname); + return CURLE_SSL_CERTPROBLEM; + } + + connssl->client_nickname = strdup(nickname); + if(SSL_GetClientAuthDataHook(model, + (SSLGetClientAuthData) SelectClientCert, + (void *)connssl) != + SECSuccess) { + curlerr = CURLE_SSL_CERTPROBLEM; + goto error; + } + + free(nickname); + + PK11_SetPasswordFunc(nss_no_password); + } + else + connssl->client_nickname = NULL; + + + /* Import our model socket onto the existing file descriptor */ + connssl->handle = PR_ImportTCPSocket(sockfd); + connssl->handle = SSL_ImportFD(model, connssl->handle); + if(!connssl->handle) + goto error; + PR_Close(model); /* We don't need this any more */ + + /* Force handshake on next I/O */ + SSL_ResetHandshake(connssl->handle, /* asServer */ PR_FALSE); + + SSL_SetURL(connssl->handle, conn->host.name); + + /* Force the handshake now */ + if(SSL_ForceHandshakeWithTimeout(connssl->handle, + PR_SecondsToInterval(HANDSHAKE_TIMEOUT)) + != SECSuccess) { + if(conn->data->set.ssl.certverifyresult!=0) + curlerr = CURLE_SSL_CACERT; + goto error; + } + + connssl->state = ssl_connection_complete; + + display_conn_info(conn, connssl->handle); + + if (data->set.str[STRING_SSL_ISSUERCERT]) { + char *n; + char *nickname; + nickname = (char *)malloc(PATH_MAX); + if(is_file(data->set.str[STRING_SSL_ISSUERCERT])) { + n = strrchr(data->set.str[STRING_SSL_ISSUERCERT], '/'); + if (n) { + n++; /* skip last slash */ + snprintf(nickname, PATH_MAX, "PEM Token #%ld:%s", 1, n); + } + } + else { + strncpy(nickname, data->set.str[STRING_SSL_ISSUERCERT], PATH_MAX); + nickname[PATH_MAX-1]=0; /* make sure this is zero terminated */ + } + if (check_issuer_cert(connssl->handle, nickname) == SECFailure) { + infof(data,"SSL certificate issuer check failed\n"); + free(nickname); + curlerr = CURLE_SSL_ISSUER_ERROR; + goto error; + } + else { + infof(data, "SSL certificate issuer check ok\n"); + } + } + + return CURLE_OK; + +error: + err = PR_GetError(); + infof(data, "NSS error %d\n", err); + if(model) + PR_Close(model); + return curlerr; +} + +/* return number of sent (non-SSL) bytes */ +int Curl_nss_send(struct connectdata *conn, /* connection data */ + int sockindex, /* socketindex */ + const void *mem, /* send this data */ + size_t len) /* amount to write */ +{ + PRInt32 err; + struct SessionHandle *data = conn->data; + PRInt32 timeout; + int rc; + + if(data->set.timeout) + timeout = PR_MillisecondsToInterval(data->set.timeout); + else + timeout = PR_MillisecondsToInterval(DEFAULT_CONNECT_TIMEOUT); + + rc = PR_Send(conn->ssl[sockindex].handle, mem, (int)len, 0, timeout); + + if(rc < 0) { + err = PR_GetError(); + + if(err == PR_IO_TIMEOUT_ERROR) { + failf(data, "SSL connection timeout"); + return CURLE_OPERATION_TIMEDOUT; + } + + failf(conn->data, "SSL write: error %d", err); + return -1; + } + return rc; /* number of bytes */ +} + +/* + * If the read would block we return -1 and set 'wouldblock' to TRUE. + * Otherwise we return the amount of data read. Other errors should return -1 + * and set 'wouldblock' to FALSE. + */ +ssize_t Curl_nss_recv(struct connectdata * conn, /* connection data */ + int num, /* socketindex */ + char *buf, /* store read data here */ + size_t buffersize, /* max amount to read */ + bool * wouldblock) +{ + ssize_t nread; + struct SessionHandle *data = conn->data; + PRInt32 timeout; + + if(data->set.timeout) + timeout = PR_SecondsToInterval(data->set.timeout); + else + timeout = PR_MillisecondsToInterval(DEFAULT_CONNECT_TIMEOUT); + + nread = PR_Recv(conn->ssl[num].handle, buf, (int)buffersize, 0, timeout); + *wouldblock = FALSE; + if(nread < 0) { + /* failed SSL read */ + PRInt32 err = PR_GetError(); + + if(err == PR_WOULD_BLOCK_ERROR) { + *wouldblock = TRUE; + return -1; /* basically EWOULDBLOCK */ + } + if(err == PR_IO_TIMEOUT_ERROR) { + failf(data, "SSL connection timeout"); + return CURLE_OPERATION_TIMEDOUT; + } + failf(conn->data, "SSL read: errno %d", err); + return -1; + } + return nread; +} + +size_t Curl_nss_version(char *buffer, size_t size) +{ + return snprintf(buffer, size, "NSS/%s", NSS_VERSION); +} +#endif /* USE_NSS */ |