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xp_ssl.c
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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2017 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Wez Furlong <[email protected]> |
| Daniel Lowrey <[email protected]> |
| Chris Wright <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "ext/standard/file.h"
#include "ext/standard/url.h"
#include "streams/php_streams_int.h"
#include "zend_smart_str.h"
#include "php_openssl.h"
#include "php_network.h"
#include <openssl/ssl.h>
#include <openssl/rsa.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/err.h>
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
#include <openssl/bn.h>
#include <openssl/dh.h>
#endif
#ifdef PHP_WIN32
#include "win32/winutil.h"
#include "win32/time.h"
#include <Wincrypt.h>
/* These are from Wincrypt.h, they conflict with OpenSSL */
#undef X509_NAME
#undef X509_CERT_PAIR
#undef X509_EXTENSIONS
#endif
#ifndef OPENSSL_NO_SSL3
#define HAVE_SSL3 1
#endif
#define HAVE_TLS11 1
#define HAVE_TLS12 1
#ifndef OPENSSL_NO_ECDH
#define HAVE_ECDH 1
#endif
#ifndef OPENSSL_NO_TLSEXT
#define HAVE_TLS_SNI 1
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
#define HAVE_TLS_ALPN 1
#endif
#endif
#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
#define HAVE_SEC_LEVEL 1
#endif
/* Flags for determining allowed stream crypto methods */
#define STREAM_CRYPTO_IS_CLIENT (1<<0)
#define STREAM_CRYPTO_METHOD_SSLv2 (1<<1)
#define STREAM_CRYPTO_METHOD_SSLv3 (1<<2)
#define STREAM_CRYPTO_METHOD_TLSv1_0 (1<<3)
#define STREAM_CRYPTO_METHOD_TLSv1_1 (1<<4)
#define STREAM_CRYPTO_METHOD_TLSv1_2 (1<<5)
/* Simplify ssl context option retrieval */
#define GET_VER_OPT(name) \
(PHP_STREAM_CONTEXT(stream) && (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", name)) != NULL)
#define GET_VER_OPT_STRING(name, str) \
if (GET_VER_OPT(name)) { convert_to_string_ex(val); str = Z_STRVAL_P(val); }
#define GET_VER_OPT_LONG(name, num) \
if (GET_VER_OPT(name)) { num = zval_get_long(val); }
/* Used for peer verification in windows */
#define PHP_X509_NAME_ENTRY_TO_UTF8(ne, i, out) \
ASN1_STRING_to_UTF8(&out, X509_NAME_ENTRY_get_data(X509_NAME_get_entry(ne, i)))
#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined (LIBRESSL_VERSION_NUMBER)
static RSA *php_openssl_tmp_rsa_cb(SSL *s, int is_export, int keylength);
#endif
extern php_stream* php_openssl_get_stream_from_ssl_handle(const SSL *ssl);
extern zend_string* php_openssl_x509_fingerprint(X509 *peer, const char *method, zend_bool raw);
extern int php_openssl_get_ssl_stream_data_index();
extern int php_openssl_get_x509_list_id(void);
static struct timeval php_openssl_subtract_timeval(struct timeval a, struct timeval b);
static int php_openssl_compare_timeval(struct timeval a, struct timeval b);
static size_t php_openssl_sockop_io(int read, php_stream *stream, char *buf, size_t count);
const php_stream_ops php_openssl_socket_ops;
/* Certificate contexts used for server-side SNI selection */
typedef struct _php_openssl_sni_cert_t {
char *name;
SSL_CTX *ctx;
} php_openssl_sni_cert_t;
/* Provides leaky bucket handhsake renegotiation rate-limiting */
typedef struct _php_openssl_handshake_bucket_t {
zend_long prev_handshake;
zend_long limit;
zend_long window;
float tokens;
unsigned should_close;
} php_openssl_handshake_bucket_t;
#ifdef HAVE_TLS_ALPN
/* Holds the available server ALPN protocols for negotiation */
typedef struct _php_openssl_alpn_ctx_t {
unsigned char *data;
unsigned short len;
} php_openssl_alpn_ctx;
#endif
/* This implementation is very closely tied to the that of the native
* sockets implemented in the core.
* Don't try this technique in other extensions!
* */
typedef struct _php_openssl_netstream_data_t {
php_netstream_data_t s;
SSL *ssl_handle;
SSL_CTX *ctx;
struct timeval connect_timeout;
int enable_on_connect;
int is_client;
int ssl_active;
php_stream_xport_crypt_method_t method;
php_openssl_handshake_bucket_t *reneg;
php_openssl_sni_cert_t *sni_certs;
unsigned sni_cert_count;
#ifdef HAVE_TLS_ALPN
php_openssl_alpn_ctx alpn_ctx;
#endif
char *url_name;
unsigned state_set:1;
unsigned _spare:31;
} php_openssl_netstream_data_t;
/* it doesn't matter that we do some hash traversal here, since it is done only
* in an error condition arising from a network connection problem */
static int php_openssl_is_http_stream_talking_to_iis(php_stream *stream) /* {{{ */
{
if (Z_TYPE(stream->wrapperdata) == IS_ARRAY &&
stream->wrapper &&
strcasecmp(stream->wrapper->wops->label, "HTTP") == 0
) {
/* the wrapperdata is an array zval containing the headers */
zval *tmp;
#define SERVER_MICROSOFT_IIS "Server: Microsoft-IIS"
#define SERVER_GOOGLE "Server: GFE/"
ZEND_HASH_FOREACH_VAL(Z_ARRVAL(stream->wrapperdata), tmp) {
if (strncasecmp(Z_STRVAL_P(tmp), SERVER_MICROSOFT_IIS, sizeof(SERVER_MICROSOFT_IIS)-1) == 0) {
return 1;
} else if (strncasecmp(Z_STRVAL_P(tmp), SERVER_GOOGLE, sizeof(SERVER_GOOGLE)-1) == 0) {
return 1;
}
} ZEND_HASH_FOREACH_END();
}
return 0;
}
/* }}} */
static int php_openssl_handle_ssl_error(php_stream *stream, int nr_bytes, zend_bool is_init) /* {{{ */
{
php_openssl_netstream_data_t *sslsock = (php_openssl_netstream_data_t*)stream->abstract;
int err = SSL_get_error(sslsock->ssl_handle, nr_bytes);
char esbuf[512];
smart_str ebuf = {0};
unsigned long ecode;
int retry = 1;
switch(err) {
case SSL_ERROR_ZERO_RETURN:
/* SSL terminated (but socket may still be active) */
retry = 0;
break;
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE:
/* re-negotiation, or perhaps the SSL layer needs more
* packets: retry in next iteration */
errno = EAGAIN;
retry = is_init ? 1 : sslsock->s.is_blocked;
break;
case SSL_ERROR_SYSCALL:
if (ERR_peek_error() == 0) {
if (nr_bytes == 0) {
if (!php_openssl_is_http_stream_talking_to_iis(stream) && ERR_get_error() != 0) {
php_error_docref(NULL, E_WARNING, "SSL: fatal protocol error");
}
SSL_set_shutdown(sslsock->ssl_handle, SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
stream->eof = 1;
retry = 0;
} else {
char *estr = php_socket_strerror(php_socket_errno(), NULL, 0);
php_error_docref(NULL, E_WARNING,
"SSL: %s", estr);
efree(estr);
retry = 0;
}
break;
}
/* fall through */
default:
/* some other error */
ecode = ERR_get_error();
switch (ERR_GET_REASON(ecode)) {
case SSL_R_NO_SHARED_CIPHER:
php_error_docref(NULL, E_WARNING,
"SSL_R_NO_SHARED_CIPHER: no suitable shared cipher could be used. "
"This could be because the server is missing an SSL certificate "
"(local_cert context option)");
retry = 0;
break;
default:
do {
/* NULL is automatically added */
ERR_error_string_n(ecode, esbuf, sizeof(esbuf));
if (ebuf.s) {
smart_str_appendc(&ebuf, '\n');
}
smart_str_appends(&ebuf, esbuf);
} while ((ecode = ERR_get_error()) != 0);
smart_str_0(&ebuf);
php_error_docref(NULL, E_WARNING,
"SSL operation failed with code %d. %s%s",
err,
ebuf.s ? "OpenSSL Error messages:\n" : "",
ebuf.s ? ZSTR_VAL(ebuf.s) : "");
if (ebuf.s) {
smart_str_free(&ebuf);
}
}
retry = 0;
errno = 0;
}
return retry;
}
/* }}} */
static int verify_callback(int preverify_ok, X509_STORE_CTX *ctx) /* {{{ */
{
php_stream *stream;
SSL *ssl;
int err, depth, ret;
zval *val;
zend_ulong allowed_depth = OPENSSL_DEFAULT_STREAM_VERIFY_DEPTH;
ret = preverify_ok;
/* determine the status for the current cert */
err = X509_STORE_CTX_get_error(ctx);
depth = X509_STORE_CTX_get_error_depth(ctx);
/* conjure the stream & context to use */
ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
stream = (php_stream*)SSL_get_ex_data(ssl, php_openssl_get_ssl_stream_data_index());
/* if allow_self_signed is set, make sure that verification succeeds */
if (err == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT &&
GET_VER_OPT("allow_self_signed") &&
zend_is_true(val)
) {
ret = 1;
}
/* check the depth */
GET_VER_OPT_LONG("verify_depth", allowed_depth);
if ((zend_ulong)depth > allowed_depth) {
ret = 0;
X509_STORE_CTX_set_error(ctx, X509_V_ERR_CERT_CHAIN_TOO_LONG);
}
return ret;
}
/* }}} */
static int php_openssl_x509_fingerprint_cmp(X509 *peer, const char *method, const char *expected)
{
zend_string *fingerprint;
int result = -1;
fingerprint = php_openssl_x509_fingerprint(peer, method, 0);
if (fingerprint) {
result = strcasecmp(expected, ZSTR_VAL(fingerprint));
zend_string_release(fingerprint);
}
return result;
}
static zend_bool php_openssl_x509_fingerprint_match(X509 *peer, zval *val)
{
if (Z_TYPE_P(val) == IS_STRING) {
const char *method = NULL;
switch (Z_STRLEN_P(val)) {
case 32:
method = "md5";
break;
case 40:
method = "sha1";
break;
}
return method && php_openssl_x509_fingerprint_cmp(peer, method, Z_STRVAL_P(val)) == 0;
} else if (Z_TYPE_P(val) == IS_ARRAY) {
zval *current;
zend_string *key;
if (!zend_hash_num_elements(Z_ARRVAL_P(val))) {
php_error_docref(NULL, E_WARNING, "Invalid peer_fingerprint array; [algo => fingerprint] form required");
return 0;
}
ZEND_HASH_FOREACH_STR_KEY_VAL(Z_ARRVAL_P(val), key, current) {
if (key == NULL || Z_TYPE_P(current) != IS_STRING) {
php_error_docref(NULL, E_WARNING, "Invalid peer_fingerprint array; [algo => fingerprint] form required");
return 0;
}
if (php_openssl_x509_fingerprint_cmp(peer, ZSTR_VAL(key), Z_STRVAL_P(current)) != 0) {
return 0;
}
} ZEND_HASH_FOREACH_END();
return 1;
} else {
php_error_docref(NULL, E_WARNING,
"Invalid peer_fingerprint value; fingerprint string or array of the form [algo => fingerprint] required");
}
return 0;
}
static zend_bool php_openssl_matches_wildcard_name(const char *subjectname, const char *certname) /* {{{ */
{
char *wildcard = NULL;
ptrdiff_t prefix_len;
size_t suffix_len, subject_len;
if (strcasecmp(subjectname, certname) == 0) {
return 1;
}
/* wildcard, if present, must only be present in the left-most component */
if (!(wildcard = strchr(certname, '*')) || memchr(certname, '.', wildcard - certname)) {
return 0;
}
/* 1) prefix, if not empty, must match subject */
prefix_len = wildcard - certname;
if (prefix_len && strncasecmp(subjectname, certname, prefix_len) != 0) {
return 0;
}
suffix_len = strlen(wildcard + 1);
subject_len = strlen(subjectname);
if (suffix_len <= subject_len) {
/* 2) suffix must match
* 3) no . between prefix and suffix
**/
return strcasecmp(wildcard + 1, subjectname + subject_len - suffix_len) == 0 &&
memchr(subjectname + prefix_len, '.', subject_len - suffix_len - prefix_len) == NULL;
}
return 0;
}
/* }}} */
static zend_bool php_openssl_matches_san_list(X509 *peer, const char *subject_name) /* {{{ */
{
int i, len;
unsigned char *cert_name = NULL;
char ipbuffer[64];
GENERAL_NAMES *alt_names = X509_get_ext_d2i(peer, NID_subject_alt_name, 0, 0);
int alt_name_count = sk_GENERAL_NAME_num(alt_names);
for (i = 0; i < alt_name_count; i++) {
GENERAL_NAME *san = sk_GENERAL_NAME_value(alt_names, i);
if (san->type == GEN_DNS) {
ASN1_STRING_to_UTF8(&cert_name, san->d.dNSName);
if ((size_t)ASN1_STRING_length(san->d.dNSName) != strlen((const char*)cert_name)) {
OPENSSL_free(cert_name);
/* prevent null-byte poisoning*/
continue;
}
/* accommodate valid FQDN entries ending in "." */
len = strlen((const char*)cert_name);
if (len && strcmp((const char *)&cert_name[len-1], ".") == 0) {
cert_name[len-1] = '\0';
}
if (php_openssl_matches_wildcard_name(subject_name, (const char *)cert_name)) {
OPENSSL_free(cert_name);
return 1;
}
OPENSSL_free(cert_name);
} else if (san->type == GEN_IPADD) {
if (san->d.iPAddress->length == 4) {
sprintf(ipbuffer, "%d.%d.%d.%d",
san->d.iPAddress->data[0],
san->d.iPAddress->data[1],
san->d.iPAddress->data[2],
san->d.iPAddress->data[3]
);
if (strcasecmp(subject_name, (const char*)ipbuffer) == 0) {
return 1;
}
}
/* No, we aren't bothering to check IPv6 addresses. Why?
* Because IP SAN names are officially deprecated and are
* not allowed by CAs starting in 2015. Deal with it.
*/
}
}
return 0;
}
/* }}} */
static zend_bool php_openssl_matches_common_name(X509 *peer, const char *subject_name) /* {{{ */
{
char buf[1024];
X509_NAME *cert_name;
zend_bool is_match = 0;
int cert_name_len;
cert_name = X509_get_subject_name(peer);
cert_name_len = X509_NAME_get_text_by_NID(cert_name, NID_commonName, buf, sizeof(buf));
if (cert_name_len == -1) {
php_error_docref(NULL, E_WARNING, "Unable to locate peer certificate CN");
} else if ((size_t)cert_name_len != strlen(buf)) {
php_error_docref(NULL, E_WARNING, "Peer certificate CN=`%.*s' is malformed", cert_name_len, buf);
} else if (php_openssl_matches_wildcard_name(subject_name, buf)) {
is_match = 1;
} else {
php_error_docref(NULL, E_WARNING,
"Peer certificate CN=`%.*s' did not match expected CN=`%s'",
cert_name_len, buf, subject_name);
}
return is_match;
}
/* }}} */
static int php_openssl_apply_peer_verification_policy(SSL *ssl, X509 *peer, php_stream *stream) /* {{{ */
{
zval *val = NULL;
char *peer_name = NULL;
int err,
must_verify_peer,
must_verify_peer_name,
must_verify_fingerprint;
php_openssl_netstream_data_t *sslsock = (php_openssl_netstream_data_t*)stream->abstract;
must_verify_peer = GET_VER_OPT("verify_peer")
? zend_is_true(val)
: sslsock->is_client;
must_verify_peer_name = GET_VER_OPT("verify_peer_name")
? zend_is_true(val)
: sslsock->is_client;
must_verify_fingerprint = GET_VER_OPT("peer_fingerprint");
if ((must_verify_peer || must_verify_peer_name || must_verify_fingerprint) && peer == NULL) {
php_error_docref(NULL, E_WARNING, "Could not get peer certificate");
return FAILURE;
}
/* Verify the peer against using CA file/path settings */
if (must_verify_peer) {
err = SSL_get_verify_result(ssl);
switch (err) {
case X509_V_OK:
/* fine */
break;
case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
if (GET_VER_OPT("allow_self_signed") && zend_is_true(val)) {
/* allowed */
break;
}
/* not allowed, so fall through */
default:
php_error_docref(NULL, E_WARNING,
"Could not verify peer: code:%d %s",
err,
X509_verify_cert_error_string(err)
);
return FAILURE;
}
}
/* If a peer_fingerprint match is required this trumps peer and peer_name verification */
if (must_verify_fingerprint) {
if (Z_TYPE_P(val) == IS_STRING || Z_TYPE_P(val) == IS_ARRAY) {
if (!php_openssl_x509_fingerprint_match(peer, val)) {
php_error_docref(NULL, E_WARNING,
"peer_fingerprint match failure"
);
return FAILURE;
}
} else {
php_error_docref(NULL, E_WARNING,
"Expected peer fingerprint must be a string or an array"
);
return FAILURE;
}
}
/* verify the host name presented in the peer certificate */
if (must_verify_peer_name) {
GET_VER_OPT_STRING("peer_name", peer_name);
/* If no peer name was specified we use the autodetected url name in client environments */
if (peer_name == NULL && sslsock->is_client) {
peer_name = sslsock->url_name;
}
if (peer_name) {
if (php_openssl_matches_san_list(peer, peer_name)) {
return SUCCESS;
} else if (php_openssl_matches_common_name(peer, peer_name)) {
return SUCCESS;
} else {
return FAILURE;
}
} else {
return FAILURE;
}
}
return SUCCESS;
}
/* }}} */
static int php_openssl_passwd_callback(char *buf, int num, int verify, void *data) /* {{{ */
{
php_stream *stream = (php_stream *)data;
zval *val = NULL;
char *passphrase = NULL;
/* TODO: could expand this to make a callback into PHP user-space */
GET_VER_OPT_STRING("passphrase", passphrase);
if (passphrase) {
if (Z_STRLEN_P(val) < (size_t)num - 1) {
memcpy(buf, Z_STRVAL_P(val), Z_STRLEN_P(val)+1);
return (int)Z_STRLEN_P(val);
}
}
return 0;
}
/* }}} */
#ifdef PHP_WIN32
#define RETURN_CERT_VERIFY_FAILURE(code) X509_STORE_CTX_set_error(x509_store_ctx, code); return 0;
static int php_openssl_win_cert_verify_callback(X509_STORE_CTX *x509_store_ctx, void *arg) /* {{{ */
{
PCCERT_CONTEXT cert_ctx = NULL;
PCCERT_CHAIN_CONTEXT cert_chain_ctx = NULL;
#if OPENSSL_VERSION_NUMBER < 0x10100000L
X509 *cert = x509_store_ctx->cert;
#else
X509 *cert = X509_STORE_CTX_get0_cert(x509_store_ctx);
#endif
php_stream *stream;
php_openssl_netstream_data_t *sslsock;
zval *val;
zend_bool is_self_signed = 0;
stream = (php_stream*)arg;
sslsock = (php_openssl_netstream_data_t*)stream->abstract;
{ /* First convert the x509 struct back to a DER encoded buffer and let Windows decode it into a form it can work with */
unsigned char *der_buf = NULL;
int der_len;
der_len = i2d_X509(cert, &der_buf);
if (der_len < 0) {
unsigned long err_code, e;
char err_buf[512];
while ((e = ERR_get_error()) != 0) {
err_code = e;
}
php_error_docref(NULL, E_WARNING, "Error encoding X509 certificate: %d: %s", err_code, ERR_error_string(err_code, err_buf));
RETURN_CERT_VERIFY_FAILURE(SSL_R_CERTIFICATE_VERIFY_FAILED);
}
cert_ctx = CertCreateCertificateContext(X509_ASN_ENCODING, der_buf, der_len);
OPENSSL_free(der_buf);
if (cert_ctx == NULL) {
php_error_docref(NULL, E_WARNING, "Error creating certificate context: %s", php_win_err());
RETURN_CERT_VERIFY_FAILURE(SSL_R_CERTIFICATE_VERIFY_FAILED);
}
}
{ /* Next fetch the relevant cert chain from the store */
CERT_ENHKEY_USAGE enhkey_usage = {0};
CERT_USAGE_MATCH cert_usage = {0};
CERT_CHAIN_PARA chain_params = {sizeof(CERT_CHAIN_PARA)};
LPSTR usages[] = {szOID_PKIX_KP_SERVER_AUTH, szOID_SERVER_GATED_CRYPTO, szOID_SGC_NETSCAPE};
DWORD chain_flags = 0;
unsigned long allowed_depth = OPENSSL_DEFAULT_STREAM_VERIFY_DEPTH;
unsigned int i;
enhkey_usage.cUsageIdentifier = 3;
enhkey_usage.rgpszUsageIdentifier = usages;
cert_usage.dwType = USAGE_MATCH_TYPE_OR;
cert_usage.Usage = enhkey_usage;
chain_params.RequestedUsage = cert_usage;
chain_flags = CERT_CHAIN_CACHE_END_CERT | CERT_CHAIN_REVOCATION_CHECK_CHAIN_EXCLUDE_ROOT;
if (!CertGetCertificateChain(NULL, cert_ctx, NULL, NULL, &chain_params, chain_flags, NULL, &cert_chain_ctx)) {
php_error_docref(NULL, E_WARNING, "Error getting certificate chain: %s", php_win_err());
CertFreeCertificateContext(cert_ctx);
RETURN_CERT_VERIFY_FAILURE(SSL_R_CERTIFICATE_VERIFY_FAILED);
}
/* check if the cert is self-signed */
if (cert_chain_ctx->cChain > 0 && cert_chain_ctx->rgpChain[0]->cElement > 0
&& (cert_chain_ctx->rgpChain[0]->rgpElement[0]->TrustStatus.dwInfoStatus & CERT_TRUST_IS_SELF_SIGNED) != 0) {
is_self_signed = 1;
}
/* check the depth */
GET_VER_OPT_LONG("verify_depth", allowed_depth);
for (i = 0; i < cert_chain_ctx->cChain; i++) {
if (cert_chain_ctx->rgpChain[i]->cElement > allowed_depth) {
CertFreeCertificateChain(cert_chain_ctx);
CertFreeCertificateContext(cert_ctx);
RETURN_CERT_VERIFY_FAILURE(X509_V_ERR_CERT_CHAIN_TOO_LONG);
}
}
}
{ /* Then verify it against a policy */
SSL_EXTRA_CERT_CHAIN_POLICY_PARA ssl_policy_params = {sizeof(SSL_EXTRA_CERT_CHAIN_POLICY_PARA)};
CERT_CHAIN_POLICY_PARA chain_policy_params = {sizeof(CERT_CHAIN_POLICY_PARA)};
CERT_CHAIN_POLICY_STATUS chain_policy_status = {sizeof(CERT_CHAIN_POLICY_STATUS)};
LPWSTR server_name = NULL;
BOOL verify_result;
{ /* This looks ridiculous and it is - but we validate the name ourselves using the peer_name
ctx option, so just use the CN from the cert here */
X509_NAME *cert_name;
unsigned char *cert_name_utf8;
int index, cert_name_utf8_len;
DWORD num_wchars;
cert_name = X509_get_subject_name(cert);
index = X509_NAME_get_index_by_NID(cert_name, NID_commonName, -1);
if (index < 0) {
php_error_docref(NULL, E_WARNING, "Unable to locate certificate CN");
CertFreeCertificateChain(cert_chain_ctx);
CertFreeCertificateContext(cert_ctx);
RETURN_CERT_VERIFY_FAILURE(SSL_R_CERTIFICATE_VERIFY_FAILED);
}
cert_name_utf8_len = PHP_X509_NAME_ENTRY_TO_UTF8(cert_name, index, cert_name_utf8);
num_wchars = MultiByteToWideChar(CP_UTF8, 0, (char*)cert_name_utf8, -1, NULL, 0);
if (num_wchars == 0) {
php_error_docref(NULL, E_WARNING, "Unable to convert %s to wide character string", cert_name_utf8);
OPENSSL_free(cert_name_utf8);
CertFreeCertificateChain(cert_chain_ctx);
CertFreeCertificateContext(cert_ctx);
RETURN_CERT_VERIFY_FAILURE(SSL_R_CERTIFICATE_VERIFY_FAILED);
}
server_name = emalloc((num_wchars * sizeof(WCHAR)) + sizeof(WCHAR));
num_wchars = MultiByteToWideChar(CP_UTF8, 0, (char*)cert_name_utf8, -1, server_name, num_wchars);
if (num_wchars == 0) {
php_error_docref(NULL, E_WARNING, "Unable to convert %s to wide character string", cert_name_utf8);
efree(server_name);
OPENSSL_free(cert_name_utf8);
CertFreeCertificateChain(cert_chain_ctx);
CertFreeCertificateContext(cert_ctx);
RETURN_CERT_VERIFY_FAILURE(SSL_R_CERTIFICATE_VERIFY_FAILED);
}
OPENSSL_free(cert_name_utf8);
}
ssl_policy_params.dwAuthType = (sslsock->is_client) ? AUTHTYPE_SERVER : AUTHTYPE_CLIENT;
ssl_policy_params.pwszServerName = server_name;
chain_policy_params.pvExtraPolicyPara = &ssl_policy_params;
verify_result = CertVerifyCertificateChainPolicy(CERT_CHAIN_POLICY_SSL, cert_chain_ctx, &chain_policy_params, &chain_policy_status);
efree(server_name);
CertFreeCertificateChain(cert_chain_ctx);
CertFreeCertificateContext(cert_ctx);
if (!verify_result) {
php_error_docref(NULL, E_WARNING, "Error verifying certificate chain policy: %s", php_win_err());
RETURN_CERT_VERIFY_FAILURE(SSL_R_CERTIFICATE_VERIFY_FAILED);
}
if (chain_policy_status.dwError != 0) {
/* The chain does not match the policy */
if (is_self_signed && chain_policy_status.dwError == CERT_E_UNTRUSTEDROOT
&& GET_VER_OPT("allow_self_signed") && zend_is_true(val)) {
/* allow self-signed certs */
X509_STORE_CTX_set_error(x509_store_ctx, X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
} else {
RETURN_CERT_VERIFY_FAILURE(SSL_R_CERTIFICATE_VERIFY_FAILED);
}
}
}
return 1;
}
/* }}} */
#endif
static long php_openssl_load_stream_cafile(X509_STORE *cert_store, const char *cafile) /* {{{ */
{
php_stream *stream;
X509 *cert;
BIO *buffer;
int buffer_active = 0;
char *line = NULL;
size_t line_len;
long certs_added = 0;
stream = php_stream_open_wrapper(cafile, "rb", 0, NULL);
if (stream == NULL) {
php_error(E_WARNING, "failed loading cafile stream: `%s'", cafile);
return 0;
} else if (stream->wrapper->is_url) {
php_stream_close(stream);
php_error(E_WARNING, "remote cafile streams are disabled for security purposes");
return 0;
}
cert_start: {
line = php_stream_get_line(stream, NULL, 0, &line_len);
if (line == NULL) {
goto stream_complete;
} else if (!strcmp(line, "-----BEGIN CERTIFICATE-----\n") ||
!strcmp(line, "-----BEGIN CERTIFICATE-----\r\n")
) {
buffer = BIO_new(BIO_s_mem());
buffer_active = 1;
goto cert_line;
} else {
efree(line);
goto cert_start;
}
}
cert_line: {
BIO_puts(buffer, line);
efree(line);
line = php_stream_get_line(stream, NULL, 0, &line_len);
if (line == NULL) {
goto stream_complete;
} else if (!strcmp(line, "-----END CERTIFICATE-----") ||
!strcmp(line, "-----END CERTIFICATE-----\n") ||
!strcmp(line, "-----END CERTIFICATE-----\r\n")
) {
goto add_cert;
} else {
goto cert_line;
}
}
add_cert: {
BIO_puts(buffer, line);
efree(line);
cert = PEM_read_bio_X509(buffer, NULL, 0, NULL);
BIO_free(buffer);
buffer_active = 0;
if (cert && X509_STORE_add_cert(cert_store, cert)) {
++certs_added;
}
goto cert_start;
}
stream_complete: {
php_stream_close(stream);
if (buffer_active == 1) {
BIO_free(buffer);
}
}
if (certs_added == 0) {
php_error(E_WARNING, "no valid certs found cafile stream: `%s'", cafile);
}
return certs_added;
}
/* }}} */
static int php_openssl_enable_peer_verification(SSL_CTX *ctx, php_stream *stream) /* {{{ */
{
zval *val = NULL;
char *cafile = NULL;
char *capath = NULL;
php_openssl_netstream_data_t *sslsock = (php_openssl_netstream_data_t*)stream->abstract;
GET_VER_OPT_STRING("cafile", cafile);
GET_VER_OPT_STRING("capath", capath);
if (cafile == NULL) {
cafile = zend_ini_string("openssl.cafile", sizeof("openssl.cafile")-1, 0);
cafile = strlen(cafile) ? cafile : NULL;
} else if (!sslsock->is_client) {
/* Servers need to load and assign CA names from the cafile */
STACK_OF(X509_NAME) *cert_names = SSL_load_client_CA_file(cafile);
if (cert_names != NULL) {
SSL_CTX_set_client_CA_list(ctx, cert_names);
} else {
php_error(E_WARNING, "SSL: failed loading CA names from cafile");
return FAILURE;
}
}
if (capath == NULL) {
capath = zend_ini_string("openssl.capath", sizeof("openssl.capath")-1, 0);
capath = strlen(capath) ? capath : NULL;
}
if (cafile || capath) {
if (!SSL_CTX_load_verify_locations(ctx, cafile, capath)) {
if (cafile && !php_openssl_load_stream_cafile(SSL_CTX_get_cert_store(ctx), cafile)) {
return FAILURE;
}
}
} else {
#ifdef PHP_WIN32
SSL_CTX_set_cert_verify_callback(ctx, php_openssl_win_cert_verify_callback, (void *)stream);
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
#else
if (sslsock->is_client && !SSL_CTX_set_default_verify_paths(ctx)) {
php_error_docref(NULL, E_WARNING,
"Unable to set default verify locations and no CA settings specified");
return FAILURE;
}
#endif
}
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, verify_callback);
return SUCCESS;
}
/* }}} */
static void php_openssl_disable_peer_verification(SSL_CTX *ctx, php_stream *stream) /* {{{ */
{
SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, NULL);
}
/* }}} */
static int php_openssl_set_local_cert(SSL_CTX *ctx, php_stream *stream) /* {{{ */
{
zval *val = NULL;
char *certfile = NULL;
GET_VER_OPT_STRING("local_cert", certfile);
if (certfile) {
char resolved_path_buff[MAXPATHLEN];
const char *private_key = NULL;
if (VCWD_REALPATH(certfile, resolved_path_buff)) {
/* a certificate to use for authentication */
if (SSL_CTX_use_certificate_chain_file(ctx, resolved_path_buff) != 1) {
php_error_docref(NULL, E_WARNING,
"Unable to set local cert chain file `%s'; Check that your cafile/capath "
"settings include details of your certificate and its issuer",
certfile);
return FAILURE;
}
GET_VER_OPT_STRING("local_pk", private_key);
if (private_key) {
char resolved_path_buff_pk[MAXPATHLEN];
if (VCWD_REALPATH(private_key, resolved_path_buff_pk)) {
if (SSL_CTX_use_PrivateKey_file(ctx, resolved_path_buff_pk, SSL_FILETYPE_PEM) != 1) {
php_error_docref(NULL, E_WARNING, "Unable to set private key file `%s'", resolved_path_buff_pk);
return FAILURE;
}
}
} else {
if (SSL_CTX_use_PrivateKey_file(ctx, resolved_path_buff, SSL_FILETYPE_PEM) != 1) {
php_error_docref(NULL, E_WARNING, "Unable to set private key file `%s'", resolved_path_buff);
return FAILURE;
}
}
if (!SSL_CTX_check_private_key(ctx)) {
php_error_docref(NULL, E_WARNING, "Private key does not match certificate!");
}
}
}
return SUCCESS;
}
/* }}} */
static const SSL_METHOD *php_openssl_select_crypto_method(zend_long method_value, int is_client) /* {{{ */
{
if (method_value == STREAM_CRYPTO_METHOD_SSLv2) {
php_error_docref(NULL, E_WARNING,
"SSLv2 unavailable in this PHP version");
return NULL;
} else if (method_value == STREAM_CRYPTO_METHOD_SSLv3) {
#ifdef HAVE_SSL3
return is_client ? SSLv3_client_method() : SSLv3_server_method();
#else
php_error_docref(NULL, E_WARNING,
"SSLv3 unavailable in the OpenSSL library against which PHP is linked");
return NULL;
#endif
} else if (method_value == STREAM_CRYPTO_METHOD_TLSv1_0) {
return is_client ? TLSv1_client_method() : TLSv1_server_method();
} else if (method_value == STREAM_CRYPTO_METHOD_TLSv1_1) {
#ifdef HAVE_TLS11
return is_client ? TLSv1_1_client_method() : TLSv1_1_server_method();
#else
php_error_docref(NULL, E_WARNING,
"TLSv1.1 unavailable in the OpenSSL library against which PHP is linked");
return NULL;
#endif
} else if (method_value == STREAM_CRYPTO_METHOD_TLSv1_2) {
#ifdef HAVE_TLS12
return is_client ? TLSv1_2_client_method() : TLSv1_2_server_method();
#else
php_error_docref(NULL, E_WARNING,
"TLSv1.2 unavailable in the OpenSSL library against which PHP is linked");
return NULL;
#endif
} else {
php_error_docref(NULL, E_WARNING,
"Invalid crypto method");
return NULL;
}
}
/* }}} */
#define PHP_SSL_MAX_VERSION_LEN 32
static char *php_openssl_cipher_get_version(const SSL_CIPHER *c, char *buffer, size_t max_len) /* {{{ */
{
const char *version = SSL_CIPHER_get_version(c);
strncpy(buffer, version, max_len);
if (max_len <= strlen(version)) {
buffer[max_len - 1] = 0;
}
return buffer;
}