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nsscommon.cxx
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nsscommon.cxx
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/*
Common functions used by the NSS-aware code in systemtap.
Copyright (C) 2009-2011 Red Hat Inc.
This file is part of systemtap, and is free software. You can
redistribute it and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <iostream>
#include <fstream>
#include <sstream>
#include <cerrno>
#include <cstdio>
#include <cassert>
extern "C" {
#include <time.h>
#include <termios.h>
#include <unistd.h>
#include <glob.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <nss.h>
#include <nspr.h>
#include <ssl.h>
#include <prerror.h>
#include <secerr.h>
#include <sslerr.h>
#include <cryptohi.h>
#include <keyhi.h>
#include <secder.h>
}
#include "nsscommon.h"
#include "util.h"
using namespace std;
// Common constants and settings.
const char *
server_cert_nickname ()
{
return (const char *)"stap-server";
}
string
server_cert_db_path ()
{
string data_path;
const char* s_d = getenv ("SYSTEMTAP_DIR");
if (s_d != NULL)
data_path = s_d;
else
data_path = get_home_directory() + string("/.systemtap");
return data_path + "/ssl/server";
}
string
local_client_cert_db_path ()
{
string data_path;
const char* s_d = getenv ("SYSTEMTAP_DIR");
if (s_d != NULL)
data_path = s_d;
else
data_path = get_home_directory() + string("/.systemtap");
return data_path + "/ssl/client";
}
// Common error handling for applications using this file.
void
nsscommon_error (const string &msg, int logit)
{
// Call the extern "C" version supplied by each application.
nsscommon_error (msg.c_str (), logit);
}
// Logging. Enabled only by stap-serverd but called from some common methods.
static ofstream logfile;
void
start_log (const char *arg)
{
if (logfile.is_open ())
logfile.close ();
logfile.open (arg, ios_base::app);
if (! logfile.good ())
nsscommon_error (_F("Could not open log file %s", arg));
}
bool
log_ok ()
{
return logfile.good ();
}
void
log (const string &msg)
{
// What time is it?
time_t now;
time (& now);
string nowStr = ctime (& now);
// Remove the newline from the end of the time string.
nowStr.erase (nowStr.size () - 1, 1);
if (logfile.good ())
logfile << nowStr << ": " << msg << endl << flush;
else
clog << nowStr << ": " << msg << endl << flush;
}
void
end_log ()
{
if (logfile.is_open ())
logfile.close ();
}
// NSS/NSPR error reporting and cleanup.
// These functions are called from C code as well as C++, so make them extern "C".
extern "C"
void
nssError (void)
{
// See if PR_GetError can tell us what the error is.
PRErrorCode errorNumber = PR_GetError ();
// PR_ErrorToString always returns a valid string for errors in this range.
if (errorNumber >= PR_NSPR_ERROR_BASE && errorNumber <= PR_MAX_ERROR)
{
nsscommon_error (_F("(%d) %s", errorNumber, PR_ErrorToString (errorNumber, PR_LANGUAGE_EN)));
return;
}
// PR_ErrorToString does not handle errors outside the range above, so we handle them ourselves.
const char *errorText;
switch (errorNumber) {
default: errorText = "Unknown error"; break;
#define NSSYERROR(code,msg) case code: errorText = msg; break
#include "stapsslerr.h"
#undef NSSYERROR
}
nsscommon_error (_F("(%d) %s", errorNumber, errorText));
}
extern "C"
SECStatus
nssInit (const char *db_path, int readWrite, int issueMessage)
{
SECStatus secStatus;
if (readWrite)
secStatus = NSS_InitReadWrite (db_path);
else
secStatus = NSS_Init (db_path);
if (secStatus != SECSuccess && issueMessage)
{
nsscommon_error (_F("Error initializing NSS for %s", db_path));
nssError ();
}
return secStatus;
}
extern "C"
void
nssCleanup (const char *db_path)
{
// Shutdown NSS and ensure that it went down successfully. This is because we can not
// initialize NSS again if it does not.
if (NSS_Shutdown () != SECSuccess)
{
if (db_path)
nsscommon_error (_F("Unable to shutdown NSS for database %s", db_path));
else
{
// This shutdown request is coming from the rpm finder which attempts to shutdown NSS
// manually if rpmFreeCrypto() is not available (see rpm_finder.cxx:missing_rpm_enlist).
// At that point there is no way of knowing if NSS was actually started, so allow
// failure here with SEC_ERROR_NOT_INITIALIZED.
PRErrorCode errorNumber = PR_GetError ();
if (errorNumber == SEC_ERROR_NOT_INITIALIZED)
return;
nsscommon_error (_("Unable to shutdown NSS"));
}
nssError ();
}
}
// Certificate database password support functions.
//
// Disable character echoing, if the fd is a tty.
static void
echoOff(int fd)
{
if (isatty(fd)) {
struct termios tio;
tcgetattr(fd, &tio);
tio.c_lflag &= ~ECHO;
tcsetattr(fd, TCSAFLUSH, &tio);
}
}
/* Enable character echoing, if the fd is a tty. */
static void
echoOn(int fd)
{
if (isatty(fd)) {
struct termios tio;
tcgetattr(fd, &tio);
tio.c_lflag |= ECHO;
tcsetattr(fd, TCSAFLUSH, &tio);
}
}
/*
* This function is our custom password handler that is called by
* NSS when retrieving private certs and keys from the database. Returns a
* pointer to a string with a password for the database. Password pointer
* must be allocated by one of the NSPR memory allocation functions, or by PORT_Strdup,
* and will be freed by the caller.
*/
extern "C"
char *
nssPasswordCallback (PK11SlotInfo *info __attribute ((unused)), PRBool retry, void *arg)
{
static int retries = 0;
#define PW_MAX 200
char* password = NULL;
char* password_ret = NULL;
const char *dbname ;
int infd;
int isTTY;
if (! retry)
{
/* Not a retry. */
retries = 0;
}
else
{
/* Maximum of 2 retries for bad password. */
if (++retries > 2)
return NULL; /* No more retries */
}
/* Can only prompt for a password if stdin is a tty. */
infd = fileno (stdin);
isTTY = isatty (infd);
if (! isTTY)
{
nsscommon_error (_("Cannot prompt for certificate database password. stdin is not a tty"));
return NULL;
}
/* Prompt for password */
password = (char *)PORT_Alloc (PW_MAX);
if (! password)
{
nssError ();
return NULL;
}
dbname = (const char *)arg;
cerr << _F("Password for certificate database in %s: ", dbname) << flush;
echoOff (infd);
password_ret = fgets (password, PW_MAX, stdin);
cerr << endl << flush;
echoOn(infd);
if (password_ret)
/* stomp on the newline */
*strchrnul (password, '\n') = '\0';
else
PORT_Free (password);
return password_ret;
}
static int
create_server_cert_db (const char *db_path)
{
return create_dir (db_path, 0755);
}
static int
create_client_cert_db (const char *db_path)
{
// Same properties as the server's database, at present.
return create_server_cert_db (db_path);
}
static int
clean_cert_db (const string &db_path)
{
// First remove all files from the directory
glob_t globbuf;
string filespec = db_path + "/*";
int r = glob (filespec.c_str (), 0, NULL, & globbuf);
if (r == GLOB_NOSPACE || r == GLOB_ABORTED)
nsscommon_error (_F("Could not search certificate database directory %s", db_path.c_str ()));
else if (r != GLOB_NOMATCH)
{
for (unsigned i = 0; i < globbuf.gl_pathc; ++i)
{
if (remove_file_or_dir (globbuf.gl_pathv[i]) != 0)
nsscommon_error (_F("Could not remove %s", globbuf.gl_pathv[i]));
}
}
// Now remove the directory itself.
if (remove_file_or_dir (db_path.c_str ()) != 0)
{
nsscommon_error (_F("Could not remove certificate database directory %s\n%s",
db_path.c_str (), strerror (errno)));
return 1;
}
return 0;
}
static int
init_password (PK11SlotInfo *slot, const string &db_path, bool use_password)
{
// Prompt for the database password, if we're using one. Keep the passwords in memory for as
// little time as possible.
SECStatus secStatus;
if (use_password)
{
char *pw1 = 0;
int attempts;
const int max_attempts = 3;
for (attempts = 0; attempts < max_attempts; ++attempts)
{
pw1 = nssPasswordCallback (slot, false, (void*)db_path.c_str ());
if (! pw1)
continue;
cerr << "Confirm ";
bool match = false;
char *pw2 = nssPasswordCallback (slot, false, (void*)db_path.c_str ());
if (pw2)
{
if (strcmp (pw1, pw2) == 0)
match = true;
else
nsscommon_error (_("Passwords do not match"));
memset (pw2, 0, strlen (pw2));
PORT_Free (pw2);
}
if (match)
break;
memset (pw1, 0, strlen (pw1));
PORT_Free (pw1);
}
if (attempts >= max_attempts)
{
nsscommon_error (_("Too many password attempts"));
return 1;
}
secStatus = PK11_InitPin (slot, 0, pw1);
memset (pw1, 0, strlen (pw1));
PORT_Free (pw1);
}
else
secStatus = PK11_InitPin (slot, 0, 0);
if (secStatus != SECSuccess)
{
nsscommon_error (_F("Could not initialize pin for certificate database %s", db_path.c_str()));
nssError ();
return 1;
}
return 0;
}
static SECKEYPrivateKey *
generate_private_key (const string &db_path, PK11SlotInfo *slot, SECKEYPublicKey **pubkeyp)
{
if (PK11_Authenticate (slot, PR_TRUE, 0) != SECSuccess)
{
nsscommon_error (_F("Unable to authenticate the default slot for certificate database %s",
db_path.c_str ()));
nssError ();
return 0;
}
// Do some random-number initialization.
// TODO: We can do better.
srand (time (NULL));
char randbuf[64];
for (unsigned i = 0; i < sizeof (randbuf); ++i)
randbuf[i] = rand ();
PK11_RandomUpdate (randbuf, sizeof (randbuf));
memset (randbuf, 0, sizeof (randbuf));
// Set up for RSA.
PK11RSAGenParams rsaparams;
rsaparams.keySizeInBits = 1024;
rsaparams.pe = 0x010001;
CK_MECHANISM_TYPE mechanism = CKM_RSA_PKCS_KEY_PAIR_GEN;
// Generate the key pair.
SECKEYPrivateKey *privKey = PK11_GenerateKeyPair (slot, mechanism, & rsaparams, pubkeyp,
PR_TRUE /*isPerm*/, PR_TRUE /*isSensitive*/,
0/*pwdata*/);
if (! privKey)
{
nsscommon_error (_("Unable to generate public/private key pair"));
nssError ();
}
return privKey;
}
static CERTCertificateRequest *
generate_cert_request (SECKEYPublicKey *pubk, CERTName *subject)
{
CERTSubjectPublicKeyInfo *spki = SECKEY_CreateSubjectPublicKeyInfo (pubk);
if (! spki)
{
nsscommon_error (_("Unable to create subject public key info for certificate request"));
nssError ();
return 0;
}
/* Generate certificate request */
CERTCertificateRequest *cr = CERT_CreateCertificateRequest (subject, spki, 0);
SECKEY_DestroySubjectPublicKeyInfo (spki);
if (! cr)
{
nsscommon_error (_("Unable to create certificate request"));
nssError ();
}
return cr;
}
static CERTCertificate *
create_cert (CERTCertificateRequest *certReq, const string &dnsNames)
{
// What is the current date and time?
PRTime now = PR_Now ();
// What is the date and time 1 year from now?
PRExplodedTime printableTime;
PR_ExplodeTime (now, PR_GMTParameters, & printableTime);
printableTime.tm_month += 12;
PRTime after = PR_ImplodeTime (& printableTime);
// Note that the time is now in micro-second units.
CERTValidity *validity = CERT_CreateValidity (now, after);
if (! validity)
{
nsscommon_error (_("Unable to create certificate validity dates"));
nssError ();
return 0;
}
// Create a default serial number using the current time.
PRTime serialNumber = now >> 19; // copied from certutil.
// Create the certificate.
CERTCertificate *cert = CERT_CreateCertificate (serialNumber, & certReq->subject, validity,
certReq);
CERT_DestroyValidity (validity);
if (! cert)
{
nsscommon_error (_("Unable to create certificate"));
nssError ();
return 0;
}
// Predeclare these to keep C++ happy about jumps to the label 'error'.
SECStatus secStatus = SECSuccess;
unsigned char keyUsage = 0x0;
PRArenaPool *arena = 0;
// Add the extensions that we need.
void *extHandle = CERT_StartCertExtensions (cert);
if (! extHandle)
{
nsscommon_error (_("Unable to allocate certificate extensions"));
nssError ();
goto error;
}
// Cert type extension.
keyUsage |= (0x80 >> 1); // SSL Server
keyUsage |= (0x80 >> 3); // Object signer
keyUsage |= (0x80 >> 7); // Object signing CA
SECItem bitStringValue;
bitStringValue.data = & keyUsage;
bitStringValue.len = 1;
secStatus = CERT_EncodeAndAddBitStrExtension (extHandle,
SEC_OID_NS_CERT_EXT_CERT_TYPE,
& bitStringValue, PR_TRUE);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to encode certificate type extensions"));
nssError ();
goto error;
}
// Alternate dns name extension.
if (! dnsNames.empty ())
{
arena = PORT_NewArena (DER_DEFAULT_CHUNKSIZE);
if (! arena)
{
nsscommon_error (_("Unable to allocate alternate DNS name extension for certificate"));
goto error;
}
// Walk down the comma separated list of names.
CERTGeneralName *nameList = 0;
CERTGeneralName *current = 0;
PRCList *prev = 0;
vector<string>components;
tokenize (dnsNames, components, ",");
for (unsigned i = 0; i < components.size (); ++i)
{
char *tbuf = (char *)PORT_ArenaAlloc (arena, components[i].size () + 1);
strcpy (tbuf, components[i].c_str ());
current = (CERTGeneralName *)PORT_ZAlloc (sizeof (CERTGeneralName));
if (! current)
{
nsscommon_error (_("Unable to allocate alternate DNS name extension for certificate"));
goto error;
}
if (prev)
{
current->l.prev = prev;
prev->next = & current->l;
}
else
nameList = current;
current->type = certDNSName;
current->name.other.data = (unsigned char *)tbuf;
current->name.other.len = strlen (tbuf);
prev = & current->l;
}
// At this point nameList points to the head of a doubly linked,
// but not yet circular, list and current points to its tail.
if (nameList)
{
// Make nameList circular.
nameList->l.prev = prev;
current->l.next = & nameList->l;
// Encode and add the extension.
SECItem item;
secStatus = CERT_EncodeAltNameExtension (arena, nameList, & item);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to encode alternate DNS name extension for certificate"));
nssError ();
goto error;
}
secStatus = CERT_AddExtension(extHandle,
SEC_OID_X509_SUBJECT_ALT_NAME,
& item, PR_FALSE, PR_TRUE);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to add alternate DNS name extension for certificate"));
nssError ();
goto error;
}
}
} // extra dns names specified.
// We did not create any extensions on the cert request.
assert (certReq->attributes != NULL);
assert (certReq->attributes[0] == NULL);
// Finished with cert extensions.
secStatus = CERT_FinishExtensions (extHandle);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to complete alternate DNS name extension for certificate"));
nssError ();
goto error;
}
return cert;
error:
if (arena)
PORT_FreeArena (arena, PR_FALSE);
CERT_DestroyCertificate (cert);
return 0;
}
static SECItem *
sign_cert (CERTCertificate *cert, SECKEYPrivateKey *privKey)
{
SECOidTag algID = SEC_GetSignatureAlgorithmOidTag (privKey->keyType,
SEC_OID_UNKNOWN);
if (algID == SEC_OID_UNKNOWN)
{
nsscommon_error (_("Unable to determine the signature algorithm for the signing the certificate"));
nssError ();
return 0;
}
PRArenaPool *arena = cert->arena;
SECStatus rv = SECOID_SetAlgorithmID (arena, & cert->signature, algID, 0);
if (rv != SECSuccess)
{
nsscommon_error (_("Unable to set the signature algorithm for signing the certificate"));
nssError ();
return 0;
}
/* we only deal with cert v3 here */
*(cert->version.data) = 2;
cert->version.len = 1;
SECItem der;
der.len = 0;
der.data = 0;
void *dummy = SEC_ASN1EncodeItem (arena, & der, cert,
SEC_ASN1_GET (CERT_CertificateTemplate));
if (! dummy)
{
nsscommon_error (_("Unable to encode the certificate for signing"));
nssError ();
return 0;
}
SECItem *result = (SECItem *)PORT_ArenaZAlloc (arena, sizeof (SECItem));
if (! result)
{
nsscommon_error (_("Unable to allocate memory for signing the certificate"));
return 0;
}
rv = SEC_DerSignData (arena, result, der.data, der.len, privKey, algID);
if (rv != SECSuccess)
{
nsscommon_error (_("Unable to sign the certificate"));
nssError ();
return 0;
}
cert->derCert = *result;
return result;
}
static SECStatus
add_server_cert (const string &db_path, SECItem *certDER, PK11SlotInfo *slot)
{
// Decode the cert.
CERTCertificate *cert = CERT_DecodeCertFromPackage((char *)certDER->data, certDER->len);
if (! cert)
{
nsscommon_error (_("Unable to decode certificate"));
nssError ();
return SECFailure;
}
// Import it into the database.
CERTCertDBHandle *handle = 0;
CERTCertTrust *trust = NULL;
SECStatus secStatus = PK11_ImportCert (slot, cert, CK_INVALID_HANDLE,
server_cert_nickname (), PR_FALSE);
if (secStatus != SECSuccess)
{
nsscommon_error (_F("Unable to import certificate into the database at %s", db_path.c_str ()));
nssError ();
goto done;
}
// Make it a trusted server and signer.
trust = (CERTCertTrust *)PORT_ZAlloc (sizeof (CERTCertTrust));
if (! trust)
{
nsscommon_error (_("Unable to allocate certificate trust"));
secStatus = SECFailure;
goto done;
}
secStatus = CERT_DecodeTrustString (trust, "PCu,,PCu");
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable decode trust string 'PCu,,PCu'"));
nssError ();
goto done;
}
handle = CERT_GetDefaultCertDB ();
assert (handle);
secStatus = CERT_ChangeCertTrust (handle, cert, trust);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to change certificate trust"));
nssError ();
}
done:
CERT_DestroyCertificate (cert);
if (trust)
PORT_Free (trust);
return secStatus;
}
SECStatus
add_client_cert (const string &inFileName, const string &db_path)
{
FILE *inFile = fopen (inFileName.c_str (), "rb");
if (! inFile)
{
nsscommon_error (_F("Could not open certificate file %s for reading\n%s",
inFileName.c_str (), strerror (errno)));
return SECFailure;
}
int fd = fileno (inFile);
struct stat info;
int rc = fstat (fd, &info);
if (rc != 0)
{
nsscommon_error (_F("Could not obtain information about certificate file %s\n%s",
inFileName.c_str (), strerror (errno)));
fclose (inFile);
return SECFailure;
}
SECItem certDER;
certDER.len = info.st_size;
certDER.data = (unsigned char *)PORT_Alloc (certDER.len);
if (certDER.data == NULL)
{
nsscommon_error (_F("Could not allocate certDER\n%s",
strerror (errno)));
fclose (inFile);
return SECFailure;
}
size_t read = fread (certDER.data, 1, certDER.len, inFile);
fclose (inFile);
if (read != certDER.len)
{
nsscommon_error (_F("Error reading from certificate file %s\n%s",
inFileName.c_str (), strerror (errno)));
return SECFailure;
}
// See if the database already exists and can be initialized.
SECStatus secStatus = nssInit (db_path.c_str (), 1/*readwrite*/, 0/*issueMessage*/);
if (secStatus != SECSuccess)
{
// Try again with a fresh database.
if (clean_cert_db (db_path.c_str ()) != 0)
{
// Message already issued.
return SECFailure;
}
// Make sure the given path exists.
if (create_client_cert_db (db_path.c_str ()) != 0)
{
nsscommon_error (_F("Could not create certificate database directory %s",
db_path.c_str ()));
return SECFailure;
}
// Initialize the new database.
secStatus = nssInit (db_path.c_str (), 1/*readwrite*/);
if (secStatus != SECSuccess)
{
// Message already issued.
return SECFailure;
}
}
// Predeclare these to keep C++ happy about jumps to the label 'done'.
CERTCertificate *cert = 0;
CERTCertDBHandle *handle = 0;
CERTCertTrust *trust = 0;
PK11SlotInfo *slot = 0;
// Add the cert to the database
// Decode the cert.
secStatus = SECFailure;
cert = CERT_DecodeCertFromPackage ((char *)certDER.data, certDER.len);
if (! cert)
{
nsscommon_error (_("Unable to decode certificate"));
nssError ();
goto done;
}
// We need the internal slot for this database.
slot = PK11_GetInternalKeySlot ();
if (! slot)
{
nsscommon_error (_F("Could not obtain internal key slot for certificate database %s", db_path.c_str()));
nssError ();
goto done;
}
// Import it into the database.
secStatus = PK11_ImportCert (slot, cert, CK_INVALID_HANDLE,
server_cert_nickname (), PR_FALSE);
if (secStatus != SECSuccess)
{
nsscommon_error (_F("Could not import certificate into the database at %s", db_path.c_str()));
nssError ();
goto done;
}
// Make it a trusted SSL peer.
trust = (CERTCertTrust *)PORT_ZAlloc (sizeof (CERTCertTrust));
if (! trust)
{
nsscommon_error (_("Could not allocate certificate trust"));
goto done;
}
secStatus = CERT_DecodeTrustString (trust, "P,P,P");
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable decode trust string 'P,P,P'"));
nssError ();
goto done;
}
handle = CERT_GetDefaultCertDB ();
assert (handle);
secStatus = CERT_ChangeCertTrust (handle, cert, trust);
if (secStatus != SECSuccess)
{
nsscommon_error (_("Unable to change certificate trust"));
nssError ();
}
done:
// Free NSS/NSPR objects and shutdown NSS.
if (slot)
PK11_FreeSlot (slot);
if (trust)
PORT_Free (trust);
if (cert)
CERT_DestroyCertificate (cert);
if (certDER.data)
PORT_Free (certDER.data);
nssCleanup (db_path.c_str ());
// Make sure that the cert database files are read/write by the owner and
// readable by all.
glob_t globbuf;
string filespec = db_path + "/*";
int r = glob (filespec.c_str (), 0, NULL, & globbuf);
if (r == GLOB_NOSPACE || r == GLOB_ABORTED) {
// Not fatal, just a warning
nsscommon_error (_F("Could not search certificate database directory %s", db_path.c_str ()));
}
else if (r != GLOB_NOMATCH)
{
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
for (unsigned i = 0; i < globbuf.gl_pathc; ++i)
{
// Not fatal, just a warning
if (chmod (globbuf.gl_pathv[i], mode) != 0)
nsscommon_error (_F("Could set file permissions for %s", globbuf.gl_pathv[i]));
}
}
return secStatus;
}
int
gen_cert_db (const string &db_path, const string &extraDnsNames, bool use_password)
{
// Log the generation of a new database.
log (_F("Generating a new certificate database directory in %s",
db_path.c_str ()));
// Start with a clean cert database.
if (clean_cert_db (db_path.c_str ()) != 0)
{
// Message already issued.
return 1;
}
// Make sure the given path exists.
if (create_server_cert_db (db_path.c_str ()) != 0)
{
nsscommon_error (_F("Could not create certificate database directory %s",
db_path.c_str ()));
return 1;
}
// Initialize the new database.
SECStatus secStatus = nssInit (db_path.c_str (), 1/*readwrite*/);
if (secStatus != SECSuccess)
{
// Message already issued.
return 1;
}
// Pre declare these to keep g++ happy about jumps to the label 'error'.
CERTName *subject = 0;
SECKEYPublicKey *pubkey = 0;
SECKEYPrivateKey *privkey = 0;
CERTCertificateRequest *cr = 0;
CERTCertificate *cert = 0;
SECItem *certDER = 0;
string dnsNames;
int rc;
string outFileName;
FILE *outFile = 0;
// We need the internal slot for this database.
PK11SlotInfo *slot = PK11_GetInternalKeySlot ();
if (! slot)
{
nsscommon_error (_F("Could not obtain internal key slot for certificate database %s", db_path.c_str()));
nssError ();
goto error;
}
// Establish the password (if any) for the new database.
rc = init_password (slot, db_path, use_password);
if (rc != 0)
{
// Messages already issued.
goto error;
}
// Format the cert subject.
subject = CERT_AsciiToName ((char *)"CN=Systemtap Compile Server, OU=Systemtap");
if (! subject)
{
nsscommon_error (_("Unable to encode certificate common header"));
nssError ();
goto error;
}
// Next, generate the private key.
privkey = generate_private_key (db_path, slot, & pubkey);
if (! privkey)
{
// Message already issued.
goto error;
}
// Next, generate a cert request.
cr = generate_cert_request (pubkey, subject);
if (! cr)
{
// Message already issued.
goto error;
}
// Now, generate the cert. We need our host name and the supplied additional dns names (if any).
struct utsname utsname;
uname (& utsname);
dnsNames = utsname.nodename;
if (! extraDnsNames.empty ())
dnsNames += "," + extraDnsNames;
cert = create_cert (cr, dnsNames);
CERT_DestroyCertificateRequest (cr);
if (! cert)
{
// NSS error already issued.
nsscommon_error (_("Unable to create certificate"));
goto error;
}
// Sign the cert.
certDER = sign_cert (cert, privkey);
if (! certDER)
{
// Message already issued.
goto error;
}
// Now output it to a file.
outFileName = db_path + "/stap.cert";
outFile = fopen (outFileName.c_str (), "wb");
if (outFile)
{
size_t written = fwrite (certDER->data, 1, certDER->len, outFile);