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client-nss.cxx
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client-nss.cxx
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/*
Compile server client functions
Copyright (C) 2010-2017 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 (GPL); either version 2, or (at your option) any
later version.
*/
// Completely disable the client if NSS is not available.
#include "config.h"
#if HAVE_NSS
#include "session.h"
#include "cscommon.h"
#include "csclient.h"
#include "client-nss.h"
#include "util.h"
#include "stap-probe.h"
#include <sys/times.h>
#include <vector>
#include <fstream>
#include <sstream>
#include <cassert>
#include <cstdlib>
#include <cstdio>
#include <algorithm>
extern "C" {
#include <unistd.h>
#include <linux/limits.h>
#include <sys/time.h>
#include <glob.h>
#include <limits.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <net/if.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <pwd.h>
}
#if HAVE_AVAHI
extern "C" {
#include <avahi-client/client.h>
#include <avahi-client/lookup.h>
#include <avahi-common/simple-watch.h>
#include <avahi-common/malloc.h>
#include <avahi-common/error.h>
#include <avahi-common/timeval.h>
}
#endif // HAVE_AVAHI
extern "C" {
#include <ssl.h>
#include <nspr.h>
#include <nss.h>
#include <certdb.h>
#include <pk11pub.h>
#include <prerror.h>
#include <secerr.h>
#include <sslerr.h>
}
#include "nsscommon.h"
using namespace std;
#define STAP_CSC_01 _("WARNING: The domain name, %s, does not match the DNS name(s) on the server certificate:\n")
#define STAP_CSC_02 _("could not find input file %s\n")
#define STAP_CSC_03 _("could not open input file %s\n")
#define STAP_CSC_04 _("Unable to open output file %s\n")
#define STAP_CSC_05 _("could not write to %s\n")
#define MOK_PUBLIC_CERT_NAME "signing_key.x509"
static PRIPv6Addr ©Address (PRIPv6Addr &PRin6, const in6_addr &in6);
static PRNetAddr ©NetAddr (PRNetAddr &x, const PRNetAddr &y);
bool operator!= (const PRNetAddr &x, const PRNetAddr &y);
bool operator== (const PRNetAddr &x, const PRNetAddr &y);
extern "C"
void
nsscommon_error (const char *msg, int logit __attribute ((unused)))
{
clog << msg << endl << flush;
}
// Information about compile servers.
struct compile_server_info
{
compile_server_info () : port(0), fully_specified(false)
{
memset (& address, 0, sizeof (address));
}
string host_name;
PRNetAddr address;
unsigned short port;
bool fully_specified;
string version;
string sysinfo;
string certinfo;
vector<string> mok_fingerprints;
bool empty () const
{
return this->host_name.empty () && ! this->hasAddress () && certinfo.empty ();
}
bool hasAddress () const
{
return this->address.raw.family != 0;
}
unsigned short setAddressPort (unsigned short port)
{
if (this->address.raw.family == PR_AF_INET)
return this->address.inet.port = htons (port);
if (this->address.raw.family == PR_AF_INET6)
return this->address.ipv6.port = htons (port);
assert (0);
return 0;
}
bool isComplete () const
{
return this->hasAddress () && port != 0;
}
bool operator== (const compile_server_info &that) const
{
// If one item or the other has only a name, and possibly a port specified,
// then allow a match by name and port only. This is so that the user can specify
// names which are returned by avahi, but are not dns resolvable.
// Otherwise, we will ignore the host_name.
if ((! this->hasAddress() && this->version.empty () &&
this->sysinfo.empty () && this->certinfo.empty ()) ||
(! that.hasAddress() && that.version.empty () &&
that.sysinfo.empty () && that.certinfo.empty ()))
{
if (this->host_name != that.host_name)
return false;
}
// Compare the other fields only if they have both been set.
if (this->hasAddress() && that.hasAddress() &&
this->address != that.address)
return false;
if (this->port != 0 && that.port != 0 &&
this->port != that.port)
return false;
if (! this->version.empty () && ! that.version.empty () &&
this->version != that.version)
return false;
if (! this->sysinfo.empty () && ! that.sysinfo.empty () &&
this->sysinfo != that.sysinfo)
return false;
if (! this->certinfo.empty () && ! that.certinfo.empty () &&
this->certinfo != that.certinfo)
return false;
if (! this->mok_fingerprints.empty () && ! that.mok_fingerprints.empty ()
&& this->mok_fingerprints != that.mok_fingerprints)
return false;
return true; // They are equal
}
// Used to sort servers by preference for order of contact. The preferred server is
// "less" than the other one.
bool operator< (const compile_server_info &that) const
{
// Prefer servers with a later (higher) version number.
cs_protocol_version this_version (this->version.c_str ());
cs_protocol_version that_version (that.version.c_str ());
return that_version < this_version;
}
};
ostream &operator<< (ostream &s, const compile_server_info &i);
ostream &operator<< (ostream &s, const vector<compile_server_info> &v);
static void
preferred_order (vector<compile_server_info> &servers)
{
// Sort the given list of servers into the preferred order for contacting.
// Don't bother if there are less than 2 servers in the list.
if (servers.size () < 2)
return;
// Sort the list using compile_server_info::operator<
sort (servers.begin (), servers.end ());
}
struct resolved_host // see also PR16326, PR16342
{
string host_name;
PRNetAddr address;
resolved_host(string chost_name, PRNetAddr caddress):
host_name(chost_name), address(caddress) {}
};
struct compile_server_cache
{
vector<compile_server_info> default_servers;
vector<compile_server_info> specified_servers;
vector<compile_server_info> trusted_servers;
vector<compile_server_info> signing_servers;
vector<compile_server_info> online_servers;
vector<compile_server_info> all_servers;
map<string,vector<resolved_host> > resolved_hosts;
};
// For filtering queries.
enum compile_server_properties {
compile_server_all = 0x1,
compile_server_trusted = 0x2,
compile_server_online = 0x4,
compile_server_compatible = 0x8,
compile_server_signer = 0x10,
compile_server_specified = 0x20
};
// Static functions.
static compile_server_cache* cscache(systemtap_session& s);
static void
query_server_status (systemtap_session &s, const string &status_string);
static void
get_server_info (systemtap_session &s, int pmask,
vector<compile_server_info> &servers);
static void
get_all_server_info (systemtap_session &s,
vector<compile_server_info> &servers);
static void
get_default_server_info (systemtap_session &s,
vector<compile_server_info> &servers);
static void
get_specified_server_info (systemtap_session &s,
vector<compile_server_info> &servers,
bool no_default = false);
static void
get_or_keep_online_server_info (systemtap_session &s,
vector<compile_server_info> &servers,
bool keep);
static void
get_or_keep_trusted_server_info (systemtap_session &s,
vector<compile_server_info> &servers,
bool keep);
static void
get_or_keep_signing_server_info (systemtap_session &s,
vector<compile_server_info> &servers,
bool keep);
static void
get_or_keep_compatible_server_info (systemtap_session &s,
vector<compile_server_info> &servers,
bool keep);
static void
keep_common_server_info (const compile_server_info &info_to_keep,
vector<compile_server_info> &filtered_info);
static void
keep_common_server_info (const vector<compile_server_info> &info_to_keep,
vector<compile_server_info> &filtered_info);
static void
keep_server_info_with_cert_and_port (systemtap_session &s,
const compile_server_info &server,
vector<compile_server_info> &servers);
static void
add_server_info (const compile_server_info &info,
vector<compile_server_info> &list);
static void
add_server_info (const vector<compile_server_info> &source,
vector<compile_server_info> &target);
static void
merge_server_info (const compile_server_info &source,
compile_server_info &target);
#if 0 // not used right now
static void merge_server_info (const compile_server_info &source, vector<compile_server_info> &target);
static void merge_server_info (const vector<compile_server_info> &source, vector <compile_server_info> &target);
#endif
static void
resolve_host (systemtap_session& s, compile_server_info &server,
vector<compile_server_info> &servers);
/* Exit error codes */
#define SUCCESS 0
#define GENERAL_ERROR 1
#define CA_CERT_INVALID_ERROR 2
#define SERVER_CERT_EXPIRED_ERROR 3
// -----------------------------------------------------
// NSS related code used by the compile server client
// -----------------------------------------------------
static void
add_server_trust (systemtap_session &s, const string &cert_db_path,
vector<compile_server_info> &server_list);
static void
revoke_server_trust (systemtap_session &s, const string &cert_db_path,
const vector<compile_server_info> &server_list);
static void
get_server_info_from_db (systemtap_session &s,
vector<compile_server_info> &servers,
const string &cert_db_path);
static string global_client_cert_db_path () {
return SYSCONFDIR "/systemtap/ssl/client";
}
static string
private_ssl_cert_db_path ()
{
return local_client_cert_db_path ();
}
static string
global_ssl_cert_db_path ()
{
return global_client_cert_db_path ();
}
static string
signing_cert_db_path ()
{
return SYSCONFDIR "/systemtap/staprun";
}
/* Connection state. */
typedef struct connectionState_t
{
const char *hostName;
PRNetAddr addr;
const char *infileName;
const char *outfileName;
const char *trustNewServerMode;
} connectionState_t;
#if 0 /* No client authorization */
static char *
myPasswd(PK11SlotInfo *info, PRBool retry, void *arg)
{
char * passwd = NULL;
if ( (!retry) && arg )
passwd = PORT_Strdup((char *)arg);
return passwd;
}
#endif
/* Add the server's certificate to our database of trusted servers. */
static SECStatus
trustNewServer (CERTCertificate *serverCert)
{
SECStatus secStatus;
CERTCertTrust *trust = NULL;
PK11SlotInfo *slot = NULL;
/* Import the certificate. */
slot = PK11_GetInternalKeySlot();
const char *nickname = server_cert_nickname ();
secStatus = PK11_ImportCert(slot, serverCert, CK_INVALID_HANDLE, nickname, PR_FALSE);
if (secStatus != SECSuccess)
goto done;
/* Make it a trusted peer. */
trust = (CERTCertTrust *)PORT_ZAlloc(sizeof(CERTCertTrust));
if (! trust)
{
secStatus = SECFailure;
goto done;
}
secStatus = CERT_DecodeTrustString(trust, "P,P,P");
if (secStatus != SECSuccess)
goto done;
secStatus = CERT_ChangeCertTrust(CERT_GetDefaultCertDB(), serverCert, trust);
done:
if (slot)
PK11_FreeSlot (slot);
if (trust)
PORT_Free(trust);
return secStatus;
}
/* Called when the server certificate verification fails. This gives us
the chance to trust the server anyway and add the certificate to the
local database. */
static SECStatus
badCertHandler(void *arg, PRFileDesc *sslSocket)
{
SECStatus secStatus;
PRErrorCode errorNumber;
CERTCertificate *serverCert = NULL;
SECItem subAltName;
PRArenaPool *tmpArena = NULL;
CERTGeneralName *nameList, *current;
char *expected = NULL;
const connectionState_t *connectionState = (connectionState_t *)arg;
errorNumber = PR_GetError ();
switch (errorNumber)
{
case SSL_ERROR_BAD_CERT_DOMAIN:
/* Since we administer our own client-side databases of trustworthy
certificates, we don't need the domain name(s) on the certificate to
match. If the cert is in our database, then we can trust it.
If we know the expected domain name, then issue a warning but,
in any case, accept the certificate. */
secStatus = SECSuccess;
expected = SSL_RevealURL (sslSocket);
if (expected == NULL || *expected == '\0')
break;
fprintf (stderr, STAP_CSC_01, expected);
/* List the DNS names from the server cert as part of the warning.
First, find the alt-name extension on the certificate. */
subAltName.data = NULL;
serverCert = SSL_PeerCertificate (sslSocket);
secStatus = CERT_FindCertExtension (serverCert,
SEC_OID_X509_SUBJECT_ALT_NAME,
& subAltName);
if (secStatus != SECSuccess || ! subAltName.data)
{
fprintf (stderr, _("Unable to find alt name extension on the server certificate\n"));
secStatus = SECSuccess; /* Not a fatal error */
break;
}
// Now, decode the extension.
tmpArena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (! tmpArena)
{
fprintf (stderr, _("Out of memory\n"));
SECITEM_FreeItem(& subAltName, PR_FALSE);
secStatus = SECSuccess; /* Not a fatal error here */
break;
}
nameList = CERT_DecodeAltNameExtension (tmpArena, & subAltName);
SECITEM_FreeItem(& subAltName, PR_FALSE);
if (! nameList)
{
fprintf (stderr, _("Unable to decode alt name extension on server certificate\n"));
secStatus = SECSuccess; /* Not a fatal error */
break;
}
/* List the DNS names from the server cert as part of the warning.
The names are in a circular list. */
current = nameList;
do
{
/* Make sure this is a DNS name. */
if (current->type == certDNSName)
{
fprintf (stderr, " %.*s\n",
(int)current->name.other.len, current->name.other.data);
}
current = CERT_GetNextGeneralName (current);
}
while (current != nameList);
break;
case SEC_ERROR_CA_CERT_INVALID:
/* The server's certificate is not trusted. Should we trust it? */
secStatus = SECFailure; /* Do not trust by default. */
if (! connectionState->trustNewServerMode)
break;
/* Trust it for this session only? */
if (strcmp (connectionState->trustNewServerMode, "session") == 0)
{
secStatus = SECSuccess;
break;
}
/* Trust it permanently? */
if (strcmp (connectionState->trustNewServerMode, "permanent") == 0)
{
/* The user wants to trust this server. Get the server's certificate so
and add it to our database. */
serverCert = SSL_PeerCertificate (sslSocket);
if (serverCert != NULL)
{
secStatus = trustNewServer (serverCert);
}
}
break;
default:
secStatus = SECFailure; /* Do not trust this server */
break;
}
if (expected)
PORT_Free (expected);
if (tmpArena)
PORT_FreeArena (tmpArena, PR_FALSE);
if (serverCert != NULL)
{
CERT_DestroyCertificate (serverCert);
}
return secStatus;
}
static PRFileDesc *
setupSSLSocket (connectionState_t *connectionState)
{
PRFileDesc *tcpSocket;
PRFileDesc *sslSocket;
PRSocketOptionData socketOption;
PRStatus prStatus;
SECStatus secStatus;
tcpSocket = PR_OpenTCPSocket(connectionState->addr.raw.family);
if (tcpSocket == NULL)
goto loser;
/* Make the socket blocking. */
socketOption.option = PR_SockOpt_Nonblocking;
socketOption.value.non_blocking = PR_FALSE;
prStatus = PR_SetSocketOption(tcpSocket, &socketOption);
if (prStatus != PR_SUCCESS)
goto loser;
/* Import the socket into the SSL layer. */
sslSocket = SSL_ImportFD(NULL, tcpSocket);
if (!sslSocket)
goto loser;
/* Set configuration options. */
secStatus = SSL_OptionSet(sslSocket, SSL_SECURITY, PR_TRUE);
if (secStatus != SECSuccess)
goto loser;
secStatus = SSL_OptionSet(sslSocket, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE);
if (secStatus != SECSuccess)
goto loser;
/* Set SSL callback routines. */
#if 0 /* no client authentication */
secStatus = SSL_GetClientAuthDataHook(sslSocket,
(SSLGetClientAuthData)myGetClientAuthData,
(void *)certNickname);
if (secStatus != SECSuccess)
goto loser;
#endif
#if 0 /* Use the default */
secStatus = SSL_AuthCertificateHook(sslSocket,
(SSLAuthCertificate)myAuthCertificate,
(void *)CERT_GetDefaultCertDB());
if (secStatus != SECSuccess)
goto loser;
#endif
secStatus = SSL_BadCertHook(sslSocket, (SSLBadCertHandler)badCertHandler,
connectionState);
if (secStatus != SECSuccess)
goto loser;
#if 0 /* No handshake callback */
secStatus = SSL_HandshakeCallback(sslSocket, myHandshakeCallback, NULL);
if (secStatus != SECSuccess)
goto loser;
#endif
return sslSocket;
loser:
if (tcpSocket)
PR_Close(tcpSocket);
return NULL;
}
static SECStatus
handle_connection (PRFileDesc *sslSocket, connectionState_t *connectionState)
{
PRInt32 numBytes;
char *readBuffer;
PRFileInfo info;
PRFileDesc *local_file_fd;
PRStatus prStatus;
SECStatus secStatus = SECSuccess;
#define READ_BUFFER_SIZE (60 * 1024)
/* If we don't have both the input and output file names, then we're
contacting this server only in order to establish trust. In this case send
0 as the file size and exit. */
if (! connectionState->infileName || ! connectionState->outfileName)
{
numBytes = htonl ((PRInt32)0);
numBytes = PR_Write (sslSocket, & numBytes, sizeof (numBytes));
if (numBytes < 0)
return SECFailure;
return SECSuccess;
}
/* read and send the data. */
/* Try to open the local file named.
* If successful, then write it to the server
*/
prStatus = PR_GetFileInfo(connectionState->infileName, &info);
if (prStatus != PR_SUCCESS ||
info.type != PR_FILE_FILE ||
info.size < 0)
{
fprintf (stderr, STAP_CSC_02,
connectionState->infileName);
return SECFailure;
}
local_file_fd = PR_Open(connectionState->infileName, PR_RDONLY, 0);
if (local_file_fd == NULL)
{
fprintf (stderr, STAP_CSC_03, connectionState->infileName);
return SECFailure;
}
/* Send the file size first, so the server knows when it has the entire file. */
numBytes = htonl ((PRInt32)info.size);
numBytes = PR_Write(sslSocket, & numBytes, sizeof (numBytes));
if (numBytes < 0)
{
PR_Close(local_file_fd);
return SECFailure;
}
/* Transmit the local file across the socket. */
numBytes = PR_TransmitFile(sslSocket, local_file_fd,
NULL, 0,
PR_TRANSMITFILE_KEEP_OPEN,
PR_INTERVAL_NO_TIMEOUT);
if (numBytes < 0)
{
PR_Close(local_file_fd);
return SECFailure;
}
PR_Close(local_file_fd);
/* read until EOF */
readBuffer = (char *)PORT_Alloc(READ_BUFFER_SIZE);
if (! readBuffer) {
fprintf (stderr, _("Out of memory\n"));
return SECFailure;
}
local_file_fd = PR_Open(connectionState->outfileName, PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE,
PR_IRUSR | PR_IWUSR | PR_IRGRP | PR_IWGRP | PR_IROTH);
if (local_file_fd == NULL)
{
fprintf (stderr, STAP_CSC_04, connectionState->outfileName);
return SECFailure;
}
while (PR_TRUE)
{
// No need for PR_Read_Complete here, since we're already managing multiple
// reads to a fixed size buffer.
numBytes = PR_Read (sslSocket, readBuffer, READ_BUFFER_SIZE);
if (numBytes == 0)
break; /* EOF */
if (numBytes < 0)
{
secStatus = SECFailure;
break;
}
/* Write to output file */
numBytes = PR_Write(local_file_fd, readBuffer, numBytes);
if (numBytes < 0)
{
fprintf (stderr, STAP_CSC_05, connectionState->outfileName);
secStatus = SECFailure;
break;
}
}
PR_Free(readBuffer);
PR_Close(local_file_fd);
/* Caller closes the socket. */
return secStatus;
}
/* make the connection.
*/
static SECStatus
do_connect (connectionState_t *connectionState)
{
PRFileDesc *sslSocket;
PRStatus prStatus;
SECStatus secStatus;
secStatus = SECSuccess;
/* Set up SSL secure socket. */
sslSocket = setupSSLSocket (connectionState);
if (sslSocket == NULL)
return SECFailure;
#if 0 /* no client authentication */
secStatus = SSL_SetPKCS11PinArg(sslSocket, password);
if (secStatus != SECSuccess)
goto done;
#endif
secStatus = SSL_SetURL(sslSocket, connectionState->hostName);
if (secStatus != SECSuccess)
goto done;
prStatus = PR_Connect(sslSocket, & connectionState->addr, PR_INTERVAL_NO_TIMEOUT);
if (prStatus != PR_SUCCESS)
{
secStatus = SECFailure;
goto done;
}
/* Established SSL connection, ready to send data. */
secStatus = SSL_ResetHandshake(sslSocket, /* asServer */ PR_FALSE);
if (secStatus != SECSuccess)
goto done;
/* This is normally done automatically on the first I/O operation,
but doing it here catches any authentication problems early. */
secStatus = SSL_ForceHandshake(sslSocket);
if (secStatus != SECSuccess)
goto done;
// Connect to the server and make the request.
secStatus = handle_connection(sslSocket, connectionState);
done:
prStatus = PR_Close(sslSocket);
return secStatus;
}
static bool
isIPv6LinkLocal (const PRNetAddr &address)
{
// Link-local addresses are members of the address block fe80::
if (address.raw.family == PR_AF_INET6 &&
address.ipv6.ip.pr_s6_addr[0] == 0xfe && address.ipv6.ip.pr_s6_addr[1] == 0x80)
return true;
return false;
}
int
client_connect (const compile_server_info &server,
const char* infileName, const char* outfileName,
const char* trustNewServer)
{
SECStatus secStatus;
PRErrorCode errorNumber;
int attempt;
int errCode = GENERAL_ERROR;
struct connectionState_t connectionState;
// Set up a connection state for use by NSS error callbacks.
memset (& connectionState, 0, sizeof (connectionState));
connectionState.hostName = server.host_name.c_str ();
connectionState.addr = server.address;
connectionState.infileName = infileName;
connectionState.outfileName = outfileName;
connectionState.trustNewServerMode = trustNewServer;
/* Some errors (see below) represent a situation in which trying again
should succeed. However, don't try forever. */
for (attempt = 0; attempt < 5; ++attempt)
{
secStatus = do_connect (& connectionState);
if (secStatus == SECSuccess)
return SUCCESS;
errorNumber = PR_GetError ();
switch (errorNumber)
{
case PR_CONNECT_RESET_ERROR:
/* Server was not ready. */
sleep (1);
break; /* Try again */
case SEC_ERROR_EXPIRED_CERTIFICATE:
/* The server's certificate has expired. It should
generate a new certificate. Return now and we'll try again. */
errCode = SERVER_CERT_EXPIRED_ERROR;
return errCode;
case SEC_ERROR_CA_CERT_INVALID:
/* The server's certificate is not trusted. The exit code must
reflect this. */
errCode = CA_CERT_INVALID_ERROR;
return errCode;
default:
/* This error is fatal. */
return errCode;
}
}
return errCode;
}
int
nss_client_backend::initialize ()
{
// Initialize session state
argc = 0;
locale_vars.clear();
mok_fingerprints.clear();
// Private location for server certificates.
private_ssl_dbs.push_back (private_ssl_cert_db_path ());
// Additional public location.
public_ssl_dbs.push_back (global_ssl_cert_db_path ());
return 0;
}
int
nss_client_backend::add_protocol_version (const string &version)
{
// Add the current protocol version.
return write_to_file (client_tmpdir + "/version", version);
}
int
nss_client_backend::add_sysinfo ()
{
string sysinfo = "sysinfo: " + s.kernel_release + " " + s.architecture;
return write_to_file (client_tmpdir + "/sysinfo", sysinfo);
}
// Symbolically link the given file or directory into the client's temp
// directory under the given subdirectory.
int
nss_client_backend::include_file_or_directory (const string &subdir,
const string &path)
{
// Must predeclare these because we do use 'goto done' to
// exit from error situations.
vector<string> components;
string name;
int rc = 0;
// Canonicalize the given path and remove the leading /.
string rpath;
char *cpath = canonicalize_file_name (path.c_str ());
if (! cpath)
{
// It can not be canonicalized. Use the name relative to
// the current working directory and let the server deal with it.
char cwd[PATH_MAX];
if (getcwd (cwd, sizeof (cwd)) == NULL)
{
rpath = path;
rc = 1;
goto done;
}
rpath = string (cwd) + "/" + path;
}
else
{
// It can be canonicalized. Use the canonicalized name and add this
// file or directory to the request package.
rpath = cpath;
free (cpath);
// Including / would require special handling in the code below and
// is a bad idea anyway. Let's not allow it.
if (rpath == "/")
{
if (rpath != path)
clog << _F("%s resolves to %s\n", path.c_str (), rpath.c_str ());
clog << _F("Unable to send %s to the server\n", path.c_str ());
return 1;
}
// First create the requested subdirectory (if there is one).
if (! subdir.empty())
{
name = client_tmpdir + "/" + subdir;
rc = create_dir (name.c_str ());
if (rc) goto done;
}
else
{
name = client_tmpdir;
}
// Now create each component of the path within the sub directory.
assert (rpath[0] == '/');
tokenize (rpath.substr (1), components, "/");
assert (components.size () >= 1);
unsigned i;
for (i = 0; i < components.size() - 1; ++i)
{
if (components[i].empty ())
continue; // embedded '//'
name += "/" + components[i];
rc = create_dir (name.c_str ());
if (rc) goto done;
}
// Now make a symbolic link to the actual file or directory.
assert (i == components.size () - 1);
name += "/" + components[i];
rc = symlink (rpath.c_str (), name.c_str ());
if (rc) goto done;
}
// Name this file or directory in the packaged arguments.
rc = add_cmd_arg (subdir + "/" + rpath.substr (1));
done:
if (rc != 0)
{
const char* e = strerror (errno);
clog << "ERROR: unable to add "
<< rpath
<< " to temp directory as "
<< name << ": " << e
<< endl;
}
return rc;
}
int
nss_client_backend::add_cmd_arg (const string &cmd_arg)
{
int rc = 0;
ostringstream fname;
fname << client_tmpdir << "/argv" << ++argc;
write_to_file (fname.str (), cmd_arg); // NB: No terminating newline
return rc;
}
void
nss_client_backend::add_localization_variable (const std::string &var,
const std::string &value)
{
locale_vars += var + "=" + value + "\n";
}
int
nss_client_backend::finalize_localization_variables ()
{
string fname = client_tmpdir + "/locale";
return write_to_file(fname, locale_vars);
}
void
nss_client_backend::add_mok_fingerprint (const std::string &fingerprint)
{
mok_fingerprints << fingerprint << endl;
}
int
nss_client_backend::finalize_mok_fingerprints ()
{
string fname = client_tmpdir + "/mok_fingerprints";
return write_to_file(fname, mok_fingerprints.str());
}
// Package the client's temp directory into a form suitable for sending to the
// server.
int
nss_client_backend::package_request ()
{
// Package up the temporary directory into a zip file.
client_zipfile = client_tmpdir + ".zip";
string cmd = "cd " + cmdstr_quoted(client_tmpdir) + " && zip -qr "
+ cmdstr_quoted(client_zipfile) + " *";
vector<string> sh_cmd { "sh", "-c", cmd };
int rc = stap_system (s.verbose, sh_cmd);
return rc;
}
int
nss_client_backend::find_and_connect_to_server ()
{
// Accumulate info on the specified servers.
vector<compile_server_info> specified_servers;
get_specified_server_info (s, specified_servers);
// Examine the specified servers to make sure that each has been resolved
// with a host name, ip address and port. If not, try to obtain this