void SslContext::setCertFile(const std::string& filename)
{
if (error_) return;
if (!enabled) return;
TRACE("SslContext::setCertFile: \"%s\"", filename.c_str());
gnutls_datum_t data;
error_ = loadFile(data, filename);
if (error_) {
log(x0::Severity::error, "Error loading certificate file(%s): %s", filename.c_str(), error_.message().c_str());
return;
}
numX509Certs_ = sizeof(x509Certs_) / sizeof(*x509Certs_); // 8
int rv;
rv = gnutls_x509_crt_list_import(x509Certs_, &numX509Certs_, &data, GNUTLS_X509_FMT_PEM, 0);
if (rv < 0)
TRACE("gnutls_x509_crt_list_import: \"%s\"", gnutls_strerror(rv));
for (unsigned i = 0; i < numX509Certs_; ++i) {
// read Common Name (CN):
TRACE("retrieving Common Name");
std::size_t len = 0;
rv = gnutls_x509_crt_get_dn_by_oid(x509Certs_[i], GNUTLS_OID_X520_COMMON_NAME, 0, 0, nullptr, &len);
if (rv == GNUTLS_E_SHORT_MEMORY_BUFFER && len > 1) {
char *buf = new char[len + 1];
rv = gnutls_x509_crt_get_dn_by_oid(x509Certs_[i], GNUTLS_OID_X520_COMMON_NAME, 0, 0, buf, &len);
if (rv < 0)
TRACE("gnutls_x509_crt_get_dn_by_oid: \"%s\"", gnutls_strerror(rv));
certCN_ = buf;
delete[] buf;
TRACE("setCertFile: Common Name: \"%s\"", certCN_.c_str());
}
// read Subject Alternative-Name:
TRACE("retrieving Alternative-Name");
for (int k = 0; !(rv < 0); ++k) {
len = 0;
rv = gnutls_x509_crt_get_subject_alt_name(x509Certs_[i], k, nullptr, &len, nullptr);
if (rv == GNUTLS_E_SHORT_MEMORY_BUFFER && len > 1) {
char *buf = new char[len + 1];
rv = gnutls_x509_crt_get_subject_alt_name(x509Certs_[i], k, buf, &len, nullptr);
if (rv < 0)
TRACE("gnutls_x509_crt_get_subject_alt_name: \"%s\"", gnutls_strerror(rv));
buf[len] = '\0';
if (rv == GNUTLS_SAN_DNSNAME)
dnsNames_.push_back(buf);
TRACE("setCertFile: Subject: \"%s\"", buf);
delete[] buf;
}
}
}
freeFile(data);
TRACE("setCertFile: success.");
}
static gchar * hev_impathy_get_x509_certificate_hostname(gnutls_x509_crt_t cert)
{
gchar dns_name[256] = { 0 };
gsize dns_name_size = 0;
gint idx = 0;
gint res = 0;
g_debug("%s:%d[%s]", __FILE__, __LINE__, __FUNCTION__);
/* this snippet is taken from GnuTLS.
* see gnutls/lib/x509/rfc2818_hostname.c
*/
for(idx=0; 0<=res; idx++)
{
dns_name_size = sizeof(dns_name);
res = gnutls_x509_crt_get_subject_alt_name(cert,
idx, dns_name, &dns_name_size, NULL);
if((GNUTLS_SAN_DNSNAME==res) ||
(GNUTLS_SAN_IPADDRESS==res))
return g_strndup(dns_name, dns_name_size);
}
dns_name_size = sizeof(dns_name);
res = gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME,
0, 0, dns_name, &dns_name_size);
if(0 <= res)
return g_strndup(dns_name, dns_name_size);
return NULL;
}
gchar *
empathy_get_x509_certificate_hostname (gnutls_x509_crt_t cert)
{
gchar dns_name[256];
gsize dns_name_size;
gint idx;
gint res = 0;
/* this snippet is taken from GnuTLS.
* see gnutls/lib/x509/rfc2818_hostname.c
*/
for (idx = 0; res >= 0; idx++)
{
dns_name_size = sizeof (dns_name);
res = gnutls_x509_crt_get_subject_alt_name (cert, idx,
dns_name, &dns_name_size, NULL);
if (res == GNUTLS_SAN_DNSNAME || res == GNUTLS_SAN_IPADDRESS)
return g_strndup (dns_name, dns_name_size);
}
dns_name_size = sizeof (dns_name);
res = gnutls_x509_crt_get_dn_by_oid (cert, GNUTLS_OID_X520_COMMON_NAME,
0, 0, dns_name, &dns_name_size);
if (res >= 0)
return g_strndup (dns_name, dns_name_size);
return NULL;
}
std::vector<wxString> CTlsSocket::GetCertSubjectAltNames(gnutls_x509_crt_t cert)
{
std::vector<wxString> ret;
char san[4096];
for (unsigned int i = 0; i < 10000; ++i) { // I assume this is a sane limit
size_t san_size = sizeof(san) - 1;
int const type_or_error = gnutls_x509_crt_get_subject_alt_name(cert, i, san, &san_size, 0);
if (type_or_error == GNUTLS_E_SHORT_MEMORY_BUFFER) {
continue;
}
else if (type_or_error < 0) {
break;
}
if (type_or_error == GNUTLS_SAN_DNSNAME || type_or_error == GNUTLS_SAN_RFC822NAME) {
wxString dns = wxString(san, wxConvUTF8);
if (!dns.empty()) {
ret.push_back(dns);
}
}
else if (type_or_error == GNUTLS_SAN_IPADDRESS) {
wxString ip = CSocket::AddressToString(san, san_size);
if (!ip.empty()) {
ret.push_back(ip);
}
}
}
return ret;
}
/*-
* gnutls_x509_extract_certificate_subject_alt_name - This function returns the certificate's alternative name, if any
* @cert: should contain an X.509 DER encoded certificate
* @seq: specifies the sequence number of the alt name (0 for the first one, 1 for the second etc.)
* @ret: is the place where the alternative name will be copied to
* @ret_size: holds the size of ret.
*
* This function will return the alternative names, contained in the
* given certificate.
*
* This is specified in X509v3 Certificate Extensions.
* GNUTLS will return the Alternative name, or a negative
* error code.
* Returns GNUTLS_E_SHORT_MEMORY_BUFFER if ret_size is not enough to hold the alternative
* name, or the type of alternative name if everything was ok. The type is
* one of the enumerated GNUTLS_X509_SUBJECT_ALT_NAME.
*
* If the certificate does not have an Alternative name with the specified
* sequence number then returns GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE;
*
-*/
int
gnutls_x509_extract_certificate_subject_alt_name (const gnutls_datum_t *
cert, int seq,
char *ret, int *ret_size)
{
gnutls_x509_crt_t xcert;
int result;
size_t size = *ret_size;
result = gnutls_x509_crt_init (&xcert);
if (result < 0)
return result;
result = gnutls_x509_crt_import (xcert, cert, GNUTLS_X509_FMT_DER);
if (result < 0)
{
gnutls_x509_crt_deinit (xcert);
return result;
}
result =
gnutls_x509_crt_get_subject_alt_name (xcert, seq, ret, &size, NULL);
*ret_size = size;
gnutls_x509_crt_deinit (xcert);
return result;
}
static int
check_ip(gnutls_x509_crt_t cert, const void *ip, unsigned ip_size)
{
char temp[16];
size_t temp_size;
unsigned i;
int ret = 0;
/* try matching against:
* 1) a IPaddress alternative name (subjectAltName) extension
* in the certificate
*/
/* Check through all included subjectAltName extensions, comparing
* against all those of type IPAddress.
*/
for (i = 0; ret >= 0; ++i) {
temp_size = sizeof(temp);
ret = gnutls_x509_crt_get_subject_alt_name(cert, i,
temp,
&temp_size,
NULL);
if (ret == GNUTLS_SAN_IPADDRESS) {
if (temp_size == ip_size && memcmp(temp, ip, ip_size) == 0)
return 1;
} else if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER) {
ret = 0;
}
}
/* not found a matching IP */
return 0;
}
bool X509Certificate_GnuTLS::verifyHostName
(const string& hostname, std::vector <std::string>* nonMatchingNames) const
{
if (gnutls_x509_crt_check_hostname(m_data->cert, hostname.c_str()) != 0)
return true;
if (nonMatchingNames)
{
const int MAX_CN = 256;
const char* OID_X520_COMMON_NAME = "2.5.4.3";
char dnsName[MAX_CN];
size_t dnsNameLength;
dnsNameLength = sizeof(dnsName);
if (gnutls_x509_crt_get_dn_by_oid(m_data->cert, OID_X520_COMMON_NAME, 0, 0, dnsName, &dnsNameLength) >= 0)
nonMatchingNames->push_back(dnsName);
for (int i = 0, ret = 0 ; ret >= 0 ; ++i)
{
dnsNameLength = sizeof(dnsName);
ret = gnutls_x509_crt_get_subject_alt_name(m_data->cert, i, dnsName, &dnsNameLength, NULL);
if (ret == GNUTLS_SAN_DNSNAME)
nonMatchingNames->push_back(dnsName);
}
}
return false;
}
/* Returns the name of the certificate of a null name
*/
int _gnutls_get_x509_name(gnutls_x509_crt_t crt, gnutls_str_array_t * names)
{
size_t max_size;
int i, ret = 0, ret2;
char name[MAX_CN];
unsigned have_dns_name = 0;
for (i = 0; !(ret < 0); i++) {
max_size = sizeof(name);
ret =
gnutls_x509_crt_get_subject_alt_name(crt, i, name,
&max_size, NULL);
if (ret == GNUTLS_SAN_DNSNAME) {
have_dns_name = 1;
ret2 =
_gnutls_str_array_append_idna(names, name,
max_size);
if (ret2 < 0) {
_gnutls_str_array_clear(names);
return gnutls_assert_val(ret2);
}
}
}
if (have_dns_name == 0) {
max_size = sizeof(name);
ret =
gnutls_x509_crt_get_dn_by_oid(crt, OID_X520_COMMON_NAME, 0, 0,
name, &max_size);
if (ret >= 0) {
ret = _gnutls_str_array_append_idna(names, name, max_size);
if (ret < 0) {
_gnutls_str_array_clear(names);
return gnutls_assert_val(ret);
}
}
}
return 0;
}
/**
* gnutls_x509_crt_check_hostname:
* @cert: should contain an gnutls_x509_crt_t structure
* @hostname: A null terminated string that contains a DNS name
*
* This function will check if the given certificate's subject matches
* the given hostname. This is a basic implementation of the matching
* described in RFC2818 (HTTPS), which takes into account wildcards,
* and the DNSName/IPAddress subject alternative name PKIX extension.
*
* Returns: non-zero for a successful match, and zero on failure.
**/
int
gnutls_x509_crt_check_hostname (gnutls_x509_crt_t cert, const char *hostname)
{
char dnsname[MAX_CN];
size_t dnsnamesize;
int found_dnsname = 0;
int ret = 0;
int i = 0;
/* try matching against:
* 1) a DNS name as an alternative name (subjectAltName) extension
* in the certificate
* 2) the common name (CN) in the certificate
*
* either of these may be of the form: *.domain.tld
*
* only try (2) if there is no subjectAltName extension of
* type dNSName
*/
/* Check through all included subjectAltName extensions, comparing
* against all those of type dNSName.
*/
for (i = 0; !(ret < 0); i++)
{
dnsnamesize = sizeof (dnsname);
ret = gnutls_x509_crt_get_subject_alt_name (cert, i,
dnsname, &dnsnamesize,
NULL);
if (ret == GNUTLS_SAN_DNSNAME)
{
found_dnsname = 1;
if (_gnutls_hostname_compare (dnsname, dnsnamesize, hostname, 0))
{
return 1;
}
}
}
if (!found_dnsname)
{
/* not got the necessary extension, use CN instead
*/
dnsnamesize = sizeof (dnsname);
if (gnutls_x509_crt_get_dn_by_oid (cert, OID_X520_COMMON_NAME, 0,
0, dnsname, &dnsnamesize) < 0)
{
/* got an error, can't find a name
*/
return 0;
}
if (_gnutls_hostname_compare (dnsname, dnsnamesize, hostname, 0))
{
return 1;
}
}
/* not found a matching name
*/
return 0;
}
uschar *
tls_cert_subject_altname(void * cert, uschar * mod)
{
uschar * list = NULL;
int index;
size_t siz;
int ret;
uschar sep = '\n';
uschar * tag = US"";
uschar * ele;
int match = -1;
while (mod)
{
if (*mod == '>' && *++mod) sep = *mod++;
else if (Ustrcmp(mod, "dns")==0) {
match = GNUTLS_SAN_DNSNAME;
mod += 3;
}
else if (Ustrcmp(mod, "uri")==0) {
match = GNUTLS_SAN_URI;
mod += 3;
}
else if (Ustrcmp(mod, "mail")==0) {
match = GNUTLS_SAN_RFC822NAME;
mod += 4;
}
else continue;
if (*mod++ != ',')
break;
}
for(index = 0;; index++)
{
siz = 0;
switch(ret = gnutls_x509_crt_get_subject_alt_name(
(gnutls_x509_crt_t)cert, index, NULL, &siz, NULL))
{
case GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE:
return list; /* no more elements; normal exit */
case GNUTLS_E_SHORT_MEMORY_BUFFER:
break;
default:
return g_err("gs0", __FUNCTION__, ret);
}
ele = store_get(siz+1);
if ((ret = gnutls_x509_crt_get_subject_alt_name(
(gnutls_x509_crt_t)cert, index, ele, &siz, NULL)) < 0)
return g_err("gs1", __FUNCTION__, ret);
ele[siz] = '\0';
if ( match != -1 && match != ret /* wrong type of SAN */
|| Ustrlen(ele) != siz) /* contains a NUL */
continue;
switch (ret)
{
case GNUTLS_SAN_DNSNAME:
tag = US"DNS";
break;
case GNUTLS_SAN_URI:
tag = US"URI";
break;
case GNUTLS_SAN_RFC822NAME:
tag = US"MAIL";
break;
default:
continue; /* ignore unrecognised types */
}
list = string_append_listele(list, sep,
match == -1 ? string_sprintf("%s=%s", tag, ele) : ele);
}
/*NOTREACHED*/
}
static int
tlsg_session_chkhost( LDAP *ld, tls_session *session, const char *name_in )
{
tlsg_session *s = (tlsg_session *)session;
int i, ret;
const gnutls_datum_t *peer_cert_list;
unsigned int list_size;
char altname[NI_MAXHOST];
size_t altnamesize;
gnutls_x509_crt_t cert;
const char *name;
char *ptr;
char *domain = NULL;
#ifdef LDAP_PF_INET6
struct in6_addr addr;
#else
struct in_addr addr;
#endif
int len1 = 0, len2 = 0;
int ntype = IS_DNS;
if( ldap_int_hostname &&
( !name_in || !strcasecmp( name_in, "localhost" ) ) )
{
name = ldap_int_hostname;
} else {
name = name_in;
}
peer_cert_list = gnutls_certificate_get_peers( s->session,
&list_size );
if ( !peer_cert_list ) {
Debug( LDAP_DEBUG_ANY,
"TLS: unable to get peer certificate.\n",
0, 0, 0 );
/* If this was a fatal condition, things would have
* aborted long before now.
*/
return LDAP_SUCCESS;
}
ret = gnutls_x509_crt_init( &cert );
if ( ret < 0 )
return LDAP_LOCAL_ERROR;
ret = gnutls_x509_crt_import( cert, peer_cert_list, GNUTLS_X509_FMT_DER );
if ( ret ) {
gnutls_x509_crt_deinit( cert );
return LDAP_LOCAL_ERROR;
}
#ifdef LDAP_PF_INET6
if (name[0] == '[' && strchr(name, ']')) {
char *n2 = ldap_strdup(name+1);
*strchr(n2, ']') = 0;
if (inet_pton(AF_INET6, n2, &addr))
ntype = IS_IP6;
LDAP_FREE(n2);
} else
#endif
if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) {
if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4;
}
if (ntype == IS_DNS) {
len1 = strlen(name);
domain = strchr(name, '.');
if (domain) {
len2 = len1 - (domain-name);
}
}
for ( i=0, ret=0; ret >= 0; i++ ) {
altnamesize = sizeof(altname);
ret = gnutls_x509_crt_get_subject_alt_name( cert, i,
altname, &altnamesize, NULL );
if ( ret < 0 ) break;
/* ignore empty */
if ( altnamesize == 0 ) continue;
if ( ret == GNUTLS_SAN_DNSNAME ) {
if (ntype != IS_DNS) continue;
/* Is this an exact match? */
if ((len1 == altnamesize) && !strncasecmp(name, altname, len1)) {
break;
}
/* Is this a wildcard match? */
if (domain && (altname[0] == '*') && (altname[1] == '.') &&
(len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2))
{
break;
}
} else if ( ret == GNUTLS_SAN_IPADDRESS ) {
if (ntype == IS_DNS) continue;
#ifdef LDAP_PF_INET6
if (ntype == IS_IP6 && altnamesize != sizeof(struct in6_addr)) {
continue;
} else
#endif
if (ntype == IS_IP4 && altnamesize != sizeof(struct in_addr)) {
continue;
}
if (!memcmp(altname, &addr, altnamesize)) {
break;
}
}
}
if ( ret >= 0 ) {
ret = LDAP_SUCCESS;
} else {
/* find the last CN */
i=0;
do {
altnamesize = 0;
ret = gnutls_x509_crt_get_dn_by_oid( cert, CN_OID,
i, 1, altname, &altnamesize );
if ( ret == GNUTLS_E_SHORT_MEMORY_BUFFER )
i++;
else
break;
} while ( 1 );
if ( i ) {
altnamesize = sizeof(altname);
ret = gnutls_x509_crt_get_dn_by_oid( cert, CN_OID,
i-1, 0, altname, &altnamesize );
}
if ( ret < 0 ) {
Debug( LDAP_DEBUG_ANY,
"TLS: unable to get common name from peer certificate.\n",
0, 0, 0 );
ret = LDAP_CONNECT_ERROR;
if ( ld->ld_error ) {
LDAP_FREE( ld->ld_error );
}
ld->ld_error = LDAP_STRDUP(
_("TLS: unable to get CN from peer certificate"));
} else {
ret = LDAP_LOCAL_ERROR;
if ( !len1 ) len1 = strlen( name );
if ( len1 == altnamesize && strncasecmp(name, altname, altnamesize) == 0 ) {
ret = LDAP_SUCCESS;
} else if (( altname[0] == '*' ) && ( altname[1] == '.' )) {
/* Is this a wildcard match? */
if( domain &&
(len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2)) {
ret = LDAP_SUCCESS;
}
}
}
if( ret == LDAP_LOCAL_ERROR ) {
altname[altnamesize] = '\0';
Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
"common name in certificate (%s).\n",
name, altname, 0 );
ret = LDAP_CONNECT_ERROR;
if ( ld->ld_error ) {
LDAP_FREE( ld->ld_error );
}
ld->ld_error = LDAP_STRDUP(
_("TLS: hostname does not match CN in peer certificate"));
}
}
gnutls_x509_crt_deinit( cert );
return ret;
}
static CURLcode
gtls_connect_step3(struct connectdata *conn,
int sockindex)
{
unsigned int cert_list_size;
const gnutls_datum_t *chainp;
unsigned int verify_status = 0;
gnutls_x509_crt_t x509_cert, x509_issuer;
gnutls_datum_t issuerp;
char certbuf[256] = ""; /* big enough? */
size_t size;
unsigned int algo;
unsigned int bits;
time_t certclock;
const char *ptr;
struct SessionHandle *data = conn->data;
gnutls_session_t session = conn->ssl[sockindex].session;
int rc;
bool incache;
void *ssl_sessionid;
#ifdef HAS_ALPN
gnutls_datum_t proto;
#endif
CURLcode result = CURLE_OK;
gnutls_protocol_t version = gnutls_protocol_get_version(session);
/* the name of the cipher suite used, e.g. ECDHE_RSA_AES_256_GCM_SHA384. */
ptr = gnutls_cipher_suite_get_name(gnutls_kx_get(session),
gnutls_cipher_get(session),
gnutls_mac_get(session));
infof(data, "SSL connection using %s / %s\n",
gnutls_protocol_get_name(version), ptr);
/* This function will return the peer's raw certificate (chain) as sent by
the peer. These certificates are in raw format (DER encoded for
X.509). In case of a X.509 then a certificate list may be present. The
first certificate in the list is the peer's certificate, following the
issuer's certificate, then the issuer's issuer etc. */
chainp = gnutls_certificate_get_peers(session, &cert_list_size);
if(!chainp) {
if(data->set.ssl.verifypeer ||
data->set.ssl.verifyhost ||
data->set.ssl.issuercert) {
#ifdef USE_TLS_SRP
if(data->set.ssl.authtype == CURL_TLSAUTH_SRP
&& data->set.ssl.username != NULL
&& !data->set.ssl.verifypeer
&& gnutls_cipher_get(session)) {
/* no peer cert, but auth is ok if we have SRP user and cipher and no
peer verify */
}
else {
#endif
failf(data, "failed to get server cert");
return CURLE_PEER_FAILED_VERIFICATION;
#ifdef USE_TLS_SRP
}
#endif
}
infof(data, "\t common name: WARNING couldn't obtain\n");
}
if(data->set.ssl.certinfo && chainp) {
unsigned int i;
result = Curl_ssl_init_certinfo(data, cert_list_size);
if(result)
return result;
for(i = 0; i < cert_list_size; i++) {
const char *beg = (const char *) chainp[i].data;
const char *end = beg + chainp[i].size;
result = Curl_extract_certinfo(conn, i, beg, end);
if(result)
return result;
}
}
if(data->set.ssl.verifypeer) {
/* This function will try to verify the peer's certificate and return its
status (trusted, invalid etc.). The value of status should be one or
more of the gnutls_certificate_status_t enumerated elements bitwise
or'd. To avoid denial of service attacks some default upper limits
regarding the certificate key size and chain size are set. To override
them use gnutls_certificate_set_verify_limits(). */
rc = gnutls_certificate_verify_peers2(session, &verify_status);
if(rc < 0) {
failf(data, "server cert verify failed: %d", rc);
return CURLE_SSL_CONNECT_ERROR;
}
/* verify_status is a bitmask of gnutls_certificate_status bits */
if(verify_status & GNUTLS_CERT_INVALID) {
if(data->set.ssl.verifypeer) {
failf(data, "server certificate verification failed. CAfile: %s "
"CRLfile: %s", data->set.ssl.CAfile?data->set.ssl.CAfile:"none",
data->set.ssl.CRLfile?data->set.ssl.CRLfile:"none");
return CURLE_SSL_CACERT;
}
else
infof(data, "\t server certificate verification FAILED\n");
}
else
infof(data, "\t server certificate verification OK\n");
}
else
infof(data, "\t server certificate verification SKIPPED\n");
#ifdef HAS_OCSP
if(data->set.ssl.verifystatus) {
if(gnutls_ocsp_status_request_is_checked(session, 0) == 0) {
gnutls_datum_t status_request;
gnutls_ocsp_resp_t ocsp_resp;
gnutls_ocsp_cert_status_t status;
gnutls_x509_crl_reason_t reason;
rc = gnutls_ocsp_status_request_get(session, &status_request);
infof(data, "\t server certificate status verification FAILED\n");
if(rc == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
failf(data, "No OCSP response received");
return CURLE_SSL_INVALIDCERTSTATUS;
}
if(rc < 0) {
failf(data, "Invalid OCSP response received");
return CURLE_SSL_INVALIDCERTSTATUS;
}
gnutls_ocsp_resp_init(&ocsp_resp);
rc = gnutls_ocsp_resp_import(ocsp_resp, &status_request);
if(rc < 0) {
failf(data, "Invalid OCSP response received");
return CURLE_SSL_INVALIDCERTSTATUS;
}
rc = gnutls_ocsp_resp_get_single(ocsp_resp, 0, NULL, NULL, NULL, NULL,
&status, NULL, NULL, NULL, &reason);
switch(status) {
case GNUTLS_OCSP_CERT_GOOD:
break;
case GNUTLS_OCSP_CERT_REVOKED: {
const char *crl_reason;
switch(reason) {
default:
case GNUTLS_X509_CRLREASON_UNSPECIFIED:
crl_reason = "unspecified reason";
break;
case GNUTLS_X509_CRLREASON_KEYCOMPROMISE:
crl_reason = "private key compromised";
break;
case GNUTLS_X509_CRLREASON_CACOMPROMISE:
crl_reason = "CA compromised";
break;
case GNUTLS_X509_CRLREASON_AFFILIATIONCHANGED:
crl_reason = "affiliation has changed";
break;
case GNUTLS_X509_CRLREASON_SUPERSEDED:
crl_reason = "certificate superseded";
break;
case GNUTLS_X509_CRLREASON_CESSATIONOFOPERATION:
crl_reason = "operation has ceased";
break;
case GNUTLS_X509_CRLREASON_CERTIFICATEHOLD:
crl_reason = "certificate is on hold";
break;
case GNUTLS_X509_CRLREASON_REMOVEFROMCRL:
crl_reason = "will be removed from delta CRL";
break;
case GNUTLS_X509_CRLREASON_PRIVILEGEWITHDRAWN:
crl_reason = "privilege withdrawn";
break;
case GNUTLS_X509_CRLREASON_AACOMPROMISE:
crl_reason = "AA compromised";
break;
}
failf(data, "Server certificate was revoked: %s", crl_reason);
break;
}
default:
case GNUTLS_OCSP_CERT_UNKNOWN:
failf(data, "Server certificate status is unknown");
break;
}
gnutls_ocsp_resp_deinit(ocsp_resp);
return CURLE_SSL_INVALIDCERTSTATUS;
}
else
infof(data, "\t server certificate status verification OK\n");
}
else
infof(data, "\t server certificate status verification SKIPPED\n");
#endif
/* initialize an X.509 certificate structure. */
gnutls_x509_crt_init(&x509_cert);
if(chainp)
/* convert the given DER or PEM encoded Certificate to the native
gnutls_x509_crt_t format */
gnutls_x509_crt_import(x509_cert, chainp, GNUTLS_X509_FMT_DER);
if(data->set.ssl.issuercert) {
gnutls_x509_crt_init(&x509_issuer);
issuerp = load_file(data->set.ssl.issuercert);
gnutls_x509_crt_import(x509_issuer, &issuerp, GNUTLS_X509_FMT_PEM);
rc = gnutls_x509_crt_check_issuer(x509_cert, x509_issuer);
gnutls_x509_crt_deinit(x509_issuer);
unload_file(issuerp);
if(rc <= 0) {
failf(data, "server certificate issuer check failed (IssuerCert: %s)",
data->set.ssl.issuercert?data->set.ssl.issuercert:"none");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_SSL_ISSUER_ERROR;
}
infof(data, "\t server certificate issuer check OK (Issuer Cert: %s)\n",
data->set.ssl.issuercert?data->set.ssl.issuercert:"none");
}
size=sizeof(certbuf);
rc = gnutls_x509_crt_get_dn_by_oid(x509_cert, GNUTLS_OID_X520_COMMON_NAME,
0, /* the first and only one */
FALSE,
certbuf,
&size);
if(rc) {
infof(data, "error fetching CN from cert:%s\n",
gnutls_strerror(rc));
}
/* This function will check if the given certificate's subject matches the
given hostname. This is a basic implementation of the matching described
in RFC2818 (HTTPS), which takes into account wildcards, and the subject
alternative name PKIX extension. Returns non zero on success, and zero on
failure. */
rc = gnutls_x509_crt_check_hostname(x509_cert, conn->host.name);
#if GNUTLS_VERSION_NUMBER < 0x030306
/* Before 3.3.6, gnutls_x509_crt_check_hostname() didn't check IP
addresses. */
if(!rc) {
#ifdef ENABLE_IPV6
#define use_addr in6_addr
#else
#define use_addr in_addr
#endif
unsigned char addrbuf[sizeof(struct use_addr)];
unsigned char certaddr[sizeof(struct use_addr)];
size_t addrlen = 0, certaddrlen;
int i;
int ret = 0;
if(Curl_inet_pton(AF_INET, conn->host.name, addrbuf) > 0)
addrlen = 4;
#ifdef ENABLE_IPV6
else if(Curl_inet_pton(AF_INET6, conn->host.name, addrbuf) > 0)
addrlen = 16;
#endif
if(addrlen) {
for(i=0; ; i++) {
certaddrlen = sizeof(certaddr);
ret = gnutls_x509_crt_get_subject_alt_name(x509_cert, i, certaddr,
&certaddrlen, NULL);
/* If this happens, it wasn't an IP address. */
if(ret == GNUTLS_E_SHORT_MEMORY_BUFFER)
continue;
if(ret < 0)
break;
if(ret != GNUTLS_SAN_IPADDRESS)
continue;
if(certaddrlen == addrlen && !memcmp(addrbuf, certaddr, addrlen)) {
rc = 1;
break;
}
}
}
}
#endif
if(!rc) {
if(data->set.ssl.verifyhost) {
failf(data, "SSL: certificate subject name (%s) does not match "
"target host name '%s'", certbuf, conn->host.dispname);
gnutls_x509_crt_deinit(x509_cert);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t common name: %s (does not match '%s')\n",
certbuf, conn->host.dispname);
}
else
infof(data, "\t common name: %s (matched)\n", certbuf);
/* Check for time-based validity */
certclock = gnutls_x509_crt_get_expiration_time(x509_cert);
if(certclock == (time_t)-1) {
if(data->set.ssl.verifypeer) {
failf(data, "server cert expiration date verify failed");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_SSL_CONNECT_ERROR;
}
else
infof(data, "\t server certificate expiration date verify FAILED\n");
}
else {
if(certclock < time(NULL)) {
if(data->set.ssl.verifypeer) {
failf(data, "server certificate expiration date has passed.");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t server certificate expiration date FAILED\n");
}
else
infof(data, "\t server certificate expiration date OK\n");
}
certclock = gnutls_x509_crt_get_activation_time(x509_cert);
if(certclock == (time_t)-1) {
if(data->set.ssl.verifypeer) {
failf(data, "server cert activation date verify failed");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_SSL_CONNECT_ERROR;
}
else
infof(data, "\t server certificate activation date verify FAILED\n");
}
else {
if(certclock > time(NULL)) {
if(data->set.ssl.verifypeer) {
failf(data, "server certificate not activated yet.");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_PEER_FAILED_VERIFICATION;
}
else
infof(data, "\t server certificate activation date FAILED\n");
}
else
infof(data, "\t server certificate activation date OK\n");
}
ptr = data->set.str[STRING_SSL_PINNEDPUBLICKEY];
if(ptr) {
result = pkp_pin_peer_pubkey(data, x509_cert, ptr);
if(result != CURLE_OK) {
failf(data, "SSL: public key does not match pinned public key!");
gnutls_x509_crt_deinit(x509_cert);
return result;
}
}
/* Show:
- subject
- start date
- expire date
- common name
- issuer
*/
/* public key algorithm's parameters */
algo = gnutls_x509_crt_get_pk_algorithm(x509_cert, &bits);
infof(data, "\t certificate public key: %s\n",
gnutls_pk_algorithm_get_name(algo));
/* version of the X.509 certificate. */
infof(data, "\t certificate version: #%d\n",
gnutls_x509_crt_get_version(x509_cert));
size = sizeof(certbuf);
gnutls_x509_crt_get_dn(x509_cert, certbuf, &size);
infof(data, "\t subject: %s\n", certbuf);
certclock = gnutls_x509_crt_get_activation_time(x509_cert);
showtime(data, "start date", certclock);
certclock = gnutls_x509_crt_get_expiration_time(x509_cert);
showtime(data, "expire date", certclock);
size = sizeof(certbuf);
gnutls_x509_crt_get_issuer_dn(x509_cert, certbuf, &size);
infof(data, "\t issuer: %s\n", certbuf);
gnutls_x509_crt_deinit(x509_cert);
/* compression algorithm (if any) */
ptr = gnutls_compression_get_name(gnutls_compression_get(session));
/* the *_get_name() says "NULL" if GNUTLS_COMP_NULL is returned */
infof(data, "\t compression: %s\n", ptr);
#ifdef HAS_ALPN
if(data->set.ssl_enable_alpn) {
rc = gnutls_alpn_get_selected_protocol(session, &proto);
if(rc == 0) {
infof(data, "ALPN, server accepted to use %.*s\n", proto.size,
proto.data);
#ifdef USE_NGHTTP2
if(proto.size == NGHTTP2_PROTO_VERSION_ID_LEN &&
!memcmp(NGHTTP2_PROTO_VERSION_ID, proto.data,
NGHTTP2_PROTO_VERSION_ID_LEN)) {
conn->negnpn = CURL_HTTP_VERSION_2;
}
else
#endif
if(proto.size == ALPN_HTTP_1_1_LENGTH &&
!memcmp(ALPN_HTTP_1_1, proto.data, ALPN_HTTP_1_1_LENGTH)) {
conn->negnpn = CURL_HTTP_VERSION_1_1;
}
}
else
infof(data, "ALPN, server did not agree to a protocol\n");
}
#endif
conn->ssl[sockindex].state = ssl_connection_complete;
conn->recv[sockindex] = gtls_recv;
conn->send[sockindex] = gtls_send;
{
/* we always unconditionally get the session id here, as even if we
already got it from the cache and asked to use it in the connection, it
might've been rejected and then a new one is in use now and we need to
detect that. */
void *connect_sessionid;
size_t connect_idsize = 0;
/* get the session ID data size */
gnutls_session_get_data(session, NULL, &connect_idsize);
connect_sessionid = malloc(connect_idsize); /* get a buffer for it */
if(connect_sessionid) {
/* extract session ID to the allocated buffer */
gnutls_session_get_data(session, connect_sessionid, &connect_idsize);
incache = !(Curl_ssl_getsessionid(conn, &ssl_sessionid, NULL));
if(incache) {
/* there was one before in the cache, so instead of risking that the
previous one was rejected, we just kill that and store the new */
Curl_ssl_delsessionid(conn, ssl_sessionid);
}
/* store this session id */
result = Curl_ssl_addsessionid(conn, connect_sessionid, connect_idsize);
if(result) {
free(connect_sessionid);
result = CURLE_OUT_OF_MEMORY;
}
}
else
result = CURLE_OUT_OF_MEMORY;
}
return result;
}
/* Check certificate identity. Returns zero if identity matches; 1 if
* identity does not match, or <0 if the certificate had no identity.
* If 'identity' is non-NULL, store the malloc-allocated identity in
* *identity. If 'server' is non-NULL, it must be the network address
* of the server in use, and identity must be NULL. */
static int check_identity(const ne_uri *server, gnutls_x509_crt cert,
char **identity)
{
char name[255];
unsigned int critical;
int ret, seq = 0;
int match = 0, found = 0;
size_t len;
const char *hostname;
hostname = server ? server->host : "";
do {
len = sizeof name - 1;
ret = gnutls_x509_crt_get_subject_alt_name(cert, seq, name, &len,
&critical);
switch (ret) {
case GNUTLS_SAN_DNSNAME:
name[len] = '\0';
if (identity && !found) *identity = ne_strdup(name);
match = ne__ssl_match_hostname(name, len, hostname);
found = 1;
break;
case GNUTLS_SAN_IPADDRESS: {
ne_inet_addr *ia;
if (len == 4)
ia = ne_iaddr_make(ne_iaddr_ipv4, (unsigned char *)name);
else if (len == 16)
ia = ne_iaddr_make(ne_iaddr_ipv6, (unsigned char *)name);
else
ia = NULL;
if (ia) {
char buf[128];
match = strcmp(hostname,
ne_iaddr_print(ia, buf, sizeof buf)) == 0;
if (identity) *identity = ne_strdup(buf);
found = 1;
ne_iaddr_free(ia);
} else {
NE_DEBUG(NE_DBG_SSL, "iPAddress name with unsupported "
"address type (length %" NE_FMT_SIZE_T "), skipped.\n",
len);
}
} break;
case GNUTLS_SAN_URI: {
ne_uri uri;
name[len] = '\0';
if (ne_uri_parse(name, &uri) == 0 && uri.host && uri.scheme) {
ne_uri tmp;
if (identity && !found) *identity = ne_strdup(name);
found = 1;
if (server) {
/* For comparison purposes, all that matters is
* host, scheme and port; ignore the rest. */
memset(&tmp, 0, sizeof tmp);
tmp.host = uri.host;
tmp.scheme = uri.scheme;
tmp.port = uri.port;
match = ne_uri_cmp(server, &tmp) == 0;
}
}
ne_uri_free(&uri);
} break;
default:
break;
}
seq++;
} while (!match && ret != GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE);
/* Check against the commonName if no DNS alt. names were found,
* as per RFC3280. */
if (!found) {
seq = oid_find_highest_index(cert, 1, GNUTLS_OID_X520_COMMON_NAME);
if (seq >= 0) {
len = sizeof name;
name[0] = '\0';
ret = gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME,
seq, 0, name, &len);
if (ret == 0) {
if (identity) *identity = ne_strdup(name);
match = ne__ssl_match_hostname(name, len, hostname);
}
} else {
return -1;
}
}
if (*hostname)
NE_DEBUG(NE_DBG_SSL, "ssl: Identity match for '%s': %s\n", hostname,
match ? "good" : "bad");
return match ? 0 : 1;
}
void __certificate_properties_fill_cert_ext_SubjectAltName (GtkTreeStore *store,
GtkTreeIter *parent,
gnutls_x509_crt_t *certificate)
{
gint i;
for (i = 0; i < 1; i++)
{
gint result;
guint critical;
const gint BUFFER_SIZE_MAX = 1024;
gchar buffer[BUFFER_SIZE_MAX];
gsize buffer_size = BUFFER_SIZE_MAX;
gchar *hex_buffer;
GtkTreeIter l;
result = gnutls_x509_crt_get_subject_alt_name(*certificate, i, buffer, &buffer_size, &critical);
if (result == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
fprintf(stderr, "Error: (%s,%d): %s\n", __FILE__, __LINE__, gnutls_strerror(result));
break;
}
if (result == GNUTLS_E_SHORT_MEMORY_BUFFER) {
fprintf(stderr, "Error: (%s,%d): %s\n", __FILE__, __LINE__, gnutls_strerror(result));
break;
}
if (result < 0) {
fprintf(stderr, "Error: (%s,%d): %s\n", __FILE__, __LINE__, gnutls_strerror(result));
break;
}
switch (result) {
case GNUTLS_SAN_DNSNAME:
gtk_tree_store_append(store, &l, parent);
gtk_tree_store_set(store, &l, CERTIFICATE_PROPERTIES_COL_NAME, _("DNS Name"),
CERTIFICATE_PROPERTIES_COL_VALUE, buffer, -1);
break;
case GNUTLS_SAN_RFC822NAME:
gtk_tree_store_append(store, &l, parent);
gtk_tree_store_set(store, &l, CERTIFICATE_PROPERTIES_COL_NAME, _("RFC822 Name"),
CERTIFICATE_PROPERTIES_COL_VALUE, buffer, -1);
break;
case GNUTLS_SAN_URI:
gtk_tree_store_append(store, &l, parent);
gtk_tree_store_set(store, &l, CERTIFICATE_PROPERTIES_COL_NAME, _("URI"),
CERTIFICATE_PROPERTIES_COL_VALUE, buffer, -1);
break;
case GNUTLS_SAN_IPADDRESS:
hex_buffer = __certificate_properties_dump_raw_data ((guchar *) buffer, buffer_size);
gtk_tree_store_append(store, &l, parent);
gtk_tree_store_set(store, &l, CERTIFICATE_PROPERTIES_COL_NAME, _("IP"),
CERTIFICATE_PROPERTIES_COL_VALUE, hex_buffer, -1);
g_free(hex_buffer);
break;
case GNUTLS_SAN_DN:
hex_buffer = __certificate_properties_dump_RDNSequence (buffer, buffer_size);
gtk_tree_store_append(store, &l, parent);
gtk_tree_store_set(store, &l, CERTIFICATE_PROPERTIES_COL_NAME, _("Directory Name"),
CERTIFICATE_PROPERTIES_COL_VALUE, hex_buffer, -1);
g_free(hex_buffer);
break;
default:
hex_buffer = __certificate_properties_dump_raw_data((guchar *) buffer, buffer_size);
gtk_tree_store_append (store, &l, parent);
gtk_tree_store_set (store, &l, CERTIFICATE_PROPERTIES_COL_NAME, _("Value"),
CERTIFICATE_PROPERTIES_COL_VALUE, hex_buffer, -1);
g_free(hex_buffer);
break;
}
}
}
/* Check certificate identity. Returns zero if identity matches; 1 if
* identity does not match, or <0 if the certificate had no identity.
* If 'identity' is non-NULL, store the malloc-allocated identity in
* *identity. If 'server' is non-NULL, it must be the network address
* of the server in use, and identity must be NULL. */
static int check_identity(const char *hostname, gnutls_x509_crt cert,
char **identity)
{
char name[255];
unsigned int critical;
int ret, seq = 0;
int match = 0, found = 0;
size_t len;
do {
len = sizeof name;
ret = gnutls_x509_crt_get_subject_alt_name(cert, seq, name, &len,
&critical);
switch (ret) {
case GNUTLS_SAN_DNSNAME:
if (identity && !found) *identity = ne_strdup(name);
match = match_hostname(name, hostname);
found = 1;
break;
case GNUTLS_SAN_IPADDRESS: {
ne_inet_addr *ia;
if (len == 4)
ia = ne_iaddr_make(ne_iaddr_ipv4, (unsigned char *)name);
else if (len == 16)
ia = ne_iaddr_make(ne_iaddr_ipv6, (unsigned char *)name);
else
ia = NULL;
if (ia) {
char buf[128];
match = strcmp(hostname,
ne_iaddr_print(ia, buf, sizeof buf)) == 0;
if (identity) *identity = ne_strdup(buf);
found = 1;
ne_iaddr_free(ia);
} else {
NE_DEBUG(NE_DBG_SSL, "iPAddress name with unsupported "
"address type (length %" NE_FMT_SIZE_T "), skipped.\n",
len);
}
} break;
default:
break;
}
seq++;
} while (!match && ret != GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE);
/* Check against the commonName if no DNS alt. names were found,
* as per RFC3280. */
if (!found) {
seq = oid_find_highest_index(cert, 1, GNUTLS_OID_X520_COMMON_NAME);
if (seq >= 0) {
len = sizeof name;
name[0] = '\0';
ret = gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME,
seq, 0, name, &len);
if (ret == 0) {
if (identity) *identity = ne_strdup(name);
match = match_hostname(name, hostname);
}
} else {
return -1;
}
}
NE_DEBUG(NE_DBG_SSL, "Identity match: %s\n", match ? "good" : "bad");
return match ? 0 : 1;
}
