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php-src/ext/openssl/xp_ssl.c
Jakub Zelenka c2e9c71e36 Fix tests and logic for TLS 1.3
2019-04-28 17:37:43 +01:00

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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 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 |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Wez Furlong <wez@thebrainroom.com> |
| Daniel Lowrey <rdlowrey@php.net> |
| Chris Wright <daverandom@php.net> |
| Jakub Zelenka <bukka@php.net> |
+----------------------------------------------------------------------+
*/
#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
/* 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)
#define STREAM_CRYPTO_METHOD_TLSv1_3 (1<<6)
#define HAVE_TLS11 1
#define HAVE_TLS12 1
#if OPENSSL_VERSION_NUMBER >= 0x10101000
#define HAVE_TLS13 1
#endif
#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
#ifndef OPENSSL_NO_SSL3
#define HAVE_SSL3 1
#define PHP_OPENSSL_MIN_PROTO_VERSION STREAM_CRYPTO_METHOD_SSLv3
#else
#define PHP_OPENSSL_MIN_PROTO_VERSION STREAM_CRYPTO_METHOD_TLSv1_0
#endif
#ifdef HAVE_TLS13
#define PHP_OPENSSL_MAX_PROTO_VERSION STREAM_CRYPTO_METHOD_TLSv1_3
#else
#define PHP_OPENSSL_MAX_PROTO_VERSION STREAM_CRYPTO_METHOD_TLSv1_2
#endif
/* 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 PHP_OPENSSL_API_VERSION < 0x10100
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_ex(fingerprint, 0);
}
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;
zval *peer_fingerprint;
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");
peer_fingerprint = val;
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(peer_fingerprint) == IS_STRING || Z_TYPE_P(peer_fingerprint) == IS_ARRAY) {
if (!php_openssl_x509_fingerprint_match(peer, peer_fingerprint)) {
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) {
char *err = php_win_err();
php_error_docref(NULL, E_WARNING, "Error creating certificate context: %s", err);
php_win_err_free(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)) {
char *err = php_win_err();
php_error_docref(NULL, E_WARNING, "Error getting certificate chain: %s", err);
php_win_err_free(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) {
char *err = php_win_err();
php_error_docref(NULL, E_WARNING, "Error verifying certificate chain policy: %s", err);
php_win_err_free(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;
}
/* }}} */
#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;
}
/* }}} */
#if PHP_OPENSSL_API_VERSION < 0x10100
static int php_openssl_get_crypto_method_ctx_flags(int method_flags) /* {{{ */
{
int ssl_ctx_options = SSL_OP_ALL;
#ifdef SSL_OP_NO_SSLv2
ssl_ctx_options |= SSL_OP_NO_SSLv2;
#endif
#ifdef HAVE_SSL3
if (!(method_flags & STREAM_CRYPTO_METHOD_SSLv3)) {
ssl_ctx_options |= SSL_OP_NO_SSLv3;
}
#endif
if (!(method_flags & STREAM_CRYPTO_METHOD_TLSv1_0)) {
ssl_ctx_options |= SSL_OP_NO_TLSv1;
}
#ifdef HAVE_TLS11
if (!(method_flags & STREAM_CRYPTO_METHOD_TLSv1_1)) {
ssl_ctx_options |= SSL_OP_NO_TLSv1_1;
}
#endif
#ifdef HAVE_TLS12
if (!(method_flags & STREAM_CRYPTO_METHOD_TLSv1_2)) {
ssl_ctx_options |= SSL_OP_NO_TLSv1_2;
}
#endif
#ifdef HAVE_TLS13
if (!(method_flags & STREAM_CRYPTO_METHOD_TLSv1_3)) {
ssl_ctx_options |= SSL_OP_NO_TLSv1_3;
}
#endif
return ssl_ctx_options;
}
/* }}} */
#endif
static inline int php_openssl_get_min_proto_version_flag(int flags) /* {{{ */
{
int ver;
for (ver = PHP_OPENSSL_MIN_PROTO_VERSION; ver <= PHP_OPENSSL_MAX_PROTO_VERSION; ver <<= 1) {
if (flags & ver) {
return ver;
}
}
return PHP_OPENSSL_MAX_PROTO_VERSION;
}
/* }}} */
static inline int php_openssl_get_max_proto_version_flag(int flags) /* {{{ */
{
int ver;
for (ver = PHP_OPENSSL_MAX_PROTO_VERSION; ver >= PHP_OPENSSL_MIN_PROTO_VERSION; ver >>= 1) {
if (flags & ver) {
return ver;
}
}
return STREAM_CRYPTO_METHOD_TLSv1_3;
}
/* }}} */
#if PHP_OPENSSL_API_VERSION >= 0x10100
static inline int php_openssl_map_proto_version(int flag) /* {{{ */
{
switch (flag) {
#ifdef HAVE_TLS13
case STREAM_CRYPTO_METHOD_TLSv1_3:
return TLS1_3_VERSION;
#endif
case STREAM_CRYPTO_METHOD_TLSv1_2:
return TLS1_2_VERSION;
case STREAM_CRYPTO_METHOD_TLSv1_1:
return TLS1_1_VERSION;
case STREAM_CRYPTO_METHOD_TLSv1_0:
return TLS1_VERSION;
#ifdef HAVE_SSL3
case STREAM_CRYPTO_METHOD_SSLv3:
return SSL3_VERSION;
#endif
default:
return TLS1_2_VERSION;
}
}
/* }}} */
static int php_openssl_get_min_proto_version(int flags) /* {{{ */
{
return php_openssl_map_proto_version(php_openssl_get_min_proto_version_flag(flags));
}
/* }}} */
static int php_openssl_get_max_proto_version(int flags) /* {{{ */
{
return php_openssl_map_proto_version(php_openssl_get_max_proto_version_flag(flags));
}
/* }}} */
#endif
static int php_openssl_get_proto_version_flags(int flags, int min, int max) /* {{{ */
{
int ver;
if (!min) {
min = php_openssl_get_min_proto_version_flag(flags);
}
if (!max) {
max = php_openssl_get_max_proto_version_flag(flags);
}
for (ver = PHP_OPENSSL_MIN_PROTO_VERSION; ver <= PHP_OPENSSL_MAX_PROTO_VERSION; ver <<= 1) {
if (ver >= min && ver <= max) {
if (!(flags & ver)) {
flags |= ver;
}
} else if (flags & ver) {
flags &= ~ver;
}
}
return flags;
}
/* }}} */
static void php_openssl_limit_handshake_reneg(const SSL *ssl) /* {{{ */
{
php_stream *stream;
php_openssl_netstream_data_t *sslsock;
struct timeval now;
zend_long elapsed_time;
stream = php_openssl_get_stream_from_ssl_handle(ssl);
sslsock = (php_openssl_netstream_data_t*)stream->abstract;
gettimeofday(&now, NULL);
/* The initial handshake is never rate-limited */
if (sslsock->reneg->prev_handshake == 0) {
sslsock->reneg->prev_handshake = now.tv_sec;
return;
}
elapsed_time = (now.tv_sec - sslsock->reneg->prev_handshake);
sslsock->reneg->prev_handshake = now.tv_sec;
sslsock->reneg->tokens -= (elapsed_time * (sslsock->reneg->limit / sslsock->reneg->window));
if (sslsock->reneg->tokens < 0) {
sslsock->reneg->tokens = 0;
}
++sslsock->reneg->tokens;
/* The token level exceeds our allowed limit */
if (sslsock->reneg->tokens > sslsock->reneg->limit) {
zval *val;
sslsock->reneg->should_close = 1;
if (PHP_STREAM_CONTEXT(stream) && (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream),
"ssl", "reneg_limit_callback")) != NULL
) {
zval param, retval;
php_stream_to_zval(stream, &param);
/* Closing the stream inside this callback would segfault! */
stream->flags |= PHP_STREAM_FLAG_NO_FCLOSE;
if (FAILURE == call_user_function_ex(NULL, NULL, val, &retval, 1, &param, 0, NULL)) {
php_error(E_WARNING, "SSL: failed invoking reneg limit notification callback");
}
stream->flags ^= PHP_STREAM_FLAG_NO_FCLOSE;
/* If the reneg_limit_callback returned true don't auto-close */
if (Z_TYPE(retval) == IS_TRUE) {
sslsock->reneg->should_close = 0;
}
zval_ptr_dtor(&retval);
} else {
php_error_docref(NULL, E_WARNING,
"SSL: client-initiated handshake rate limit exceeded by peer");
}
}
}
/* }}} */
static void php_openssl_info_callback(const SSL *ssl, int where, int ret) /* {{{ */
{
/* Rate-limit client-initiated handshake renegotiation to prevent DoS */
if (where & SSL_CB_HANDSHAKE_START) {
php_openssl_limit_handshake_reneg(ssl);
}
}
/* }}} */
static void php_openssl_init_server_reneg_limit(php_stream *stream, php_openssl_netstream_data_t *sslsock) /* {{{ */
{
zval *val;
zend_long limit = OPENSSL_DEFAULT_RENEG_LIMIT;
zend_long window = OPENSSL_DEFAULT_RENEG_WINDOW;
if (PHP_STREAM_CONTEXT(stream) &&
NULL != (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "reneg_limit"))
) {
limit = zval_get_long(val);
}
/* No renegotiation rate-limiting */
if (limit < 0) {
return;
}
if (PHP_STREAM_CONTEXT(stream) &&
NULL != (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "reneg_window"))
) {
window = zval_get_long(val);
}
sslsock->reneg = (void*)pemalloc(sizeof(php_openssl_handshake_bucket_t),
php_stream_is_persistent(stream)
);
sslsock->reneg->limit = limit;
sslsock->reneg->window = window;
sslsock->reneg->prev_handshake = 0;
sslsock->reneg->tokens = 0;
sslsock->reneg->should_close = 0;
SSL_set_info_callback(sslsock->ssl_handle, php_openssl_info_callback);
}
/* }}} */
#if PHP_OPENSSL_API_VERSION < 0x10100
static RSA *php_openssl_tmp_rsa_cb(SSL *s, int is_export, int keylength)
{
BIGNUM *bn = NULL;
static RSA *rsa_tmp = NULL;
if (!rsa_tmp && ((bn = BN_new()) == NULL)) {
php_error_docref(NULL, E_WARNING, "allocation error generating RSA key");
}
if (!rsa_tmp && bn) {
if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
!RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
if (rsa_tmp) {
RSA_free(rsa_tmp);
}
rsa_tmp = NULL;
}
BN_free(bn);
}
return (rsa_tmp);
}
#endif
static int php_openssl_set_server_dh_param(php_stream * stream, SSL_CTX *ctx) /* {{{ */
{
DH *dh;
BIO* bio;
zval *zdhpath;
zdhpath = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "dh_param");
if (zdhpath == NULL) {
#if 0
/* Coming in OpenSSL 1.1 ... eventually we'll want to enable this
* in the absence of an explicit dh_param.
*/
SSL_CTX_set_dh_auto(ctx, 1);
#endif
return SUCCESS;
}
convert_to_string_ex(zdhpath);
bio = BIO_new_file(Z_STRVAL_P(zdhpath), PHP_OPENSSL_BIO_MODE_R(PKCS7_BINARY));
if (bio == NULL) {
php_error_docref(NULL, E_WARNING, "invalid dh_param");
return FAILURE;
}
dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
BIO_free(bio);
if (dh == NULL) {
php_error_docref(NULL, E_WARNING, "failed reading DH params");
return FAILURE;
}
if (SSL_CTX_set_tmp_dh(ctx, dh) < 0) {
php_error_docref(NULL, E_WARNING, "failed assigning DH params");
DH_free(dh);
return FAILURE;
}
DH_free(dh);
return SUCCESS;
}
/* }}} */
#if defined(HAVE_ECDH) && PHP_OPENSSL_API_VERSION < 0x10100
static int php_openssl_set_server_ecdh_curve(php_stream *stream, SSL_CTX *ctx) /* {{{ */
{
zval *zvcurve;
int curve_nid;
EC_KEY *ecdh;
zvcurve = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "ecdh_curve");
if (zvcurve == NULL) {
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
SSL_CTX_set_ecdh_auto(ctx, 1);
return SUCCESS;
#else
curve_nid = NID_X9_62_prime256v1;
#endif
} else {
convert_to_string_ex(zvcurve);
curve_nid = OBJ_sn2nid(Z_STRVAL_P(zvcurve));
if (curve_nid == NID_undef) {
php_error_docref(NULL, E_WARNING, "invalid ecdh_curve specified");
return FAILURE;
}
}
ecdh = EC_KEY_new_by_curve_name(curve_nid);
if (ecdh == NULL) {
php_error_docref(NULL, E_WARNING, "failed generating ECDH curve");
return FAILURE;
}
SSL_CTX_set_tmp_ecdh(ctx, ecdh);
EC_KEY_free(ecdh);
return SUCCESS;
}
/* }}} */
#endif
static int php_openssl_set_server_specific_opts(php_stream *stream, SSL_CTX *ctx) /* {{{ */
{
zval *zv;
long ssl_ctx_options = SSL_CTX_get_options(ctx);
#if defined(HAVE_ECDH) && PHP_OPENSSL_API_VERSION < 0x10100
if (php_openssl_set_server_ecdh_curve(stream, ctx) == FAILURE) {
return FAILURE;
}
#endif
#if PHP_OPENSSL_API_VERSION < 0x10100
SSL_CTX_set_tmp_rsa_callback(ctx, php_openssl_tmp_rsa_cb);
#endif
/* We now use php_openssl_tmp_rsa_cb to generate a key of appropriate size whenever necessary */
if (php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "rsa_key_size") != NULL) {
php_error_docref(NULL, E_WARNING, "rsa_key_size context option has been removed");
}
php_openssl_set_server_dh_param(stream, ctx);
zv = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "single_dh_use");
if (zv == NULL || zend_is_true(zv)) {
ssl_ctx_options |= SSL_OP_SINGLE_DH_USE;
}
zv = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "honor_cipher_order");
if (zv == NULL || zend_is_true(zv)) {
ssl_ctx_options |= SSL_OP_CIPHER_SERVER_PREFERENCE;
}
SSL_CTX_set_options(ctx, ssl_ctx_options);
return SUCCESS;
}
/* }}} */
#ifdef HAVE_TLS_SNI
static int php_openssl_server_sni_callback(SSL *ssl_handle, int *al, void *arg) /* {{{ */
{
php_stream *stream;
php_openssl_netstream_data_t *sslsock;
unsigned i;
const char *server_name;
server_name = SSL_get_servername(ssl_handle, TLSEXT_NAMETYPE_host_name);
if (!server_name) {
return SSL_TLSEXT_ERR_NOACK;
}
stream = (php_stream*)SSL_get_ex_data(ssl_handle, php_openssl_get_ssl_stream_data_index());
sslsock = (php_openssl_netstream_data_t*)stream->abstract;
if (!(sslsock->sni_cert_count && sslsock->sni_certs)) {
return SSL_TLSEXT_ERR_NOACK;
}
for (i=0; i < sslsock->sni_cert_count; i++) {
if (php_openssl_matches_wildcard_name(server_name, sslsock->sni_certs[i].name)) {
SSL_set_SSL_CTX(ssl_handle, sslsock->sni_certs[i].ctx);
return SSL_TLSEXT_ERR_OK;
}
}
return SSL_TLSEXT_ERR_NOACK;
}
/* }}} */
static SSL_CTX *php_openssl_create_sni_server_ctx(char *cert_path, char *key_path) /* {{{ */
{
/* The hello method is not inherited by SSL structs when assigning a new context
* inside the SNI callback, so the just use SSLv23 */
SSL_CTX *ctx = SSL_CTX_new(SSLv23_server_method());
if (SSL_CTX_use_certificate_chain_file(ctx, cert_path) != 1) {
php_error_docref(NULL, E_WARNING,
"failed setting local cert chain file `%s'; " \
"check that your cafile/capath settings include " \
"details of your certificate and its issuer",
cert_path
);
SSL_CTX_free(ctx);
return NULL;
} else if (SSL_CTX_use_PrivateKey_file(ctx, key_path, SSL_FILETYPE_PEM) != 1) {
php_error_docref(NULL, E_WARNING,
"failed setting private key from file `%s'",
key_path
);
SSL_CTX_free(ctx);
return NULL;
}
return ctx;
}
/* }}} */
static int php_openssl_enable_server_sni(php_stream *stream, php_openssl_netstream_data_t *sslsock) /* {{{ */
{
zval *val;
zval *current;
zend_string *key;
zend_ulong key_index;
int i = 0;
char resolved_path_buff[MAXPATHLEN];
SSL_CTX *ctx;
/* If the stream ctx disables SNI we're finished here */
if (GET_VER_OPT("SNI_enabled") && !zend_is_true(val)) {
return SUCCESS;
}
/* If no SNI cert array is specified we're finished here */
if (!GET_VER_OPT("SNI_server_certs")) {
return SUCCESS;
}
if (Z_TYPE_P(val) != IS_ARRAY) {
php_error_docref(NULL, E_WARNING,
"SNI_server_certs requires an array mapping host names to cert paths"
);
return FAILURE;
}
sslsock->sni_cert_count = zend_hash_num_elements(Z_ARRVAL_P(val));
if (sslsock->sni_cert_count == 0) {
php_error_docref(NULL, E_WARNING,
"SNI_server_certs host cert array must not be empty"
);
return FAILURE;
}
sslsock->sni_certs = (php_openssl_sni_cert_t*)safe_pemalloc(sslsock->sni_cert_count,
sizeof(php_openssl_sni_cert_t), 0, php_stream_is_persistent(stream)
);
memset(sslsock->sni_certs, 0, sslsock->sni_cert_count * sizeof(php_openssl_sni_cert_t));
ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL_P(val), key_index, key, current) {
(void) key_index;
if (!key) {
php_error_docref(NULL, E_WARNING,
"SNI_server_certs array requires string host name keys"
);
return FAILURE;
}
if (Z_TYPE_P(current) == IS_ARRAY) {
zval *local_pk, *local_cert;
char resolved_cert_path_buff[MAXPATHLEN], resolved_pk_path_buff[MAXPATHLEN];
local_cert = zend_hash_str_find(Z_ARRVAL_P(current), "local_cert", sizeof("local_cert")-1);
if (local_cert == NULL) {
php_error_docref(NULL, E_WARNING,
"local_cert not present in the array"
);
return FAILURE;
}
convert_to_string_ex(local_cert);
if (!VCWD_REALPATH(Z_STRVAL_P(local_cert), resolved_cert_path_buff)) {
php_error_docref(NULL, E_WARNING,
"failed setting local cert chain file `%s'; file not found",
Z_STRVAL_P(local_cert)
);
return FAILURE;
}
local_pk = zend_hash_str_find(Z_ARRVAL_P(current), "local_pk", sizeof("local_pk")-1);
if (local_pk == NULL) {
php_error_docref(NULL, E_WARNING,
"local_pk not present in the array"
);
return FAILURE;
}
convert_to_string_ex(local_pk);
if (!VCWD_REALPATH(Z_STRVAL_P(local_pk), resolved_pk_path_buff)) {
php_error_docref(NULL, E_WARNING,
"failed setting local private key file `%s'; file not found",
Z_STRVAL_P(local_pk)
);
return FAILURE;
}
ctx = php_openssl_create_sni_server_ctx(resolved_cert_path_buff, resolved_pk_path_buff);
} else if (VCWD_REALPATH(Z_STRVAL_P(current), resolved_path_buff)) {
ctx = php_openssl_create_sni_server_ctx(resolved_path_buff, resolved_path_buff);
} else {
php_error_docref(NULL, E_WARNING,
"failed setting local cert chain file `%s'; file not found",
Z_STRVAL_P(current)
);
return FAILURE;
}
if (ctx == NULL) {
return FAILURE;
}
sslsock->sni_certs[i].name = pestrdup(ZSTR_VAL(key), php_stream_is_persistent(stream));
sslsock->sni_certs[i].ctx = ctx;
++i;
} ZEND_HASH_FOREACH_END();
SSL_CTX_set_tlsext_servername_callback(sslsock->ctx, php_openssl_server_sni_callback);
return SUCCESS;
}
/* }}} */
static void php_openssl_enable_client_sni(php_stream *stream, php_openssl_netstream_data_t *sslsock) /* {{{ */
{
zval *val;
char *sni_server_name;
/* If SNI is explicitly disabled we're finished here */
if (GET_VER_OPT("SNI_enabled") && !zend_is_true(val)) {
return;
}
sni_server_name = sslsock->url_name;
GET_VER_OPT_STRING("peer_name", sni_server_name);
if (sni_server_name) {
SSL_set_tlsext_host_name(sslsock->ssl_handle, sni_server_name);
}
}
/* }}} */
#endif
#ifdef HAVE_TLS_ALPN
/**
* Parses a comma-separated list of strings into a string suitable for SSL_CTX_set_next_protos_advertised
* outlen: (output) set to the length of the resulting buffer on success.
* err: (maybe NULL) on failure, an error message line is written to this BIO.
* in: a NULL terminated string like "abc,def,ghi"
*
* returns: an emalloced buffer or NULL on failure.
*/
static unsigned char *php_openssl_alpn_protos_parse(unsigned short *outlen, const char *in) /* {{{ */
{
size_t len;
unsigned char *out;
size_t i, start = 0;
len = strlen(in);
if (len >= 65535) {
return NULL;
}
out = emalloc(strlen(in) + 1);
for (i = 0; i <= len; ++i) {
if (i == len || in[i] == ',') {
if (i - start > 255) {
efree(out);
return NULL;
}
out[start] = i - start;
start = i + 1;
} else {
out[i + 1] = in[i];
}
}
*outlen = len + 1;
return out;
}
/* }}} */
static int php_openssl_server_alpn_callback(SSL *ssl_handle,
const unsigned char **out, unsigned char *outlen,
const unsigned char *in, unsigned int inlen, void *arg) /* {{{ */
{
php_openssl_netstream_data_t *sslsock = arg;
if (SSL_select_next_proto((unsigned char **)out, outlen, sslsock->alpn_ctx.data, sslsock->alpn_ctx.len, in, inlen) != OPENSSL_NPN_NEGOTIATED) {
return SSL_TLSEXT_ERR_NOACK;
}
return SSL_TLSEXT_ERR_OK;
}
/* }}} */
#endif
int php_openssl_setup_crypto(php_stream *stream,
php_openssl_netstream_data_t *sslsock,
php_stream_xport_crypto_param *cparam) /* {{{ */
{
const SSL_METHOD *method;
int ssl_ctx_options;
int method_flags;
zend_long min_version = 0;
zend_long max_version = 0;
char *cipherlist = NULL;
char *alpn_protocols = NULL;
zval *val;
if (sslsock->ssl_handle) {
if (sslsock->s.is_blocked) {
php_error_docref(NULL, E_WARNING, "SSL/TLS already set-up for this stream");
return FAILURE;
} else {
return SUCCESS;
}
}
ERR_clear_error();
/* We need to do slightly different things based on client/server method
* so lets remember which method was selected */
sslsock->is_client = cparam->inputs.method & STREAM_CRYPTO_IS_CLIENT;
method_flags = ((cparam->inputs.method >> 1) << 1);
method = sslsock->is_client ? SSLv23_client_method() : SSLv23_server_method();
sslsock->ctx = SSL_CTX_new(method);
GET_VER_OPT_LONG("min_proto_version", min_version);
GET_VER_OPT_LONG("max_proto_version", max_version);
method_flags = php_openssl_get_proto_version_flags(method_flags, min_version, max_version);
#if PHP_OPENSSL_API_VERSION < 0x10100
ssl_ctx_options = php_openssl_get_crypto_method_ctx_flags(method_flags);
#else
ssl_ctx_options = SSL_OP_ALL;
#endif
if (sslsock->ctx == NULL) {
php_error_docref(NULL, E_WARNING, "SSL context creation failure");
return FAILURE;
}
if (GET_VER_OPT("no_ticket") && zend_is_true(val)) {
ssl_ctx_options |= SSL_OP_NO_TICKET;
}
ssl_ctx_options &= ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
if (!GET_VER_OPT("disable_compression") || zend_is_true(val)) {
ssl_ctx_options |= SSL_OP_NO_COMPRESSION;
}
if (GET_VER_OPT("verify_peer") && !zend_is_true(val)) {
php_openssl_disable_peer_verification(sslsock->ctx, stream);
} else if (FAILURE == php_openssl_enable_peer_verification(sslsock->ctx, stream)) {
return FAILURE;
}
/* callback for the passphrase (for localcert) */
if (GET_VER_OPT("passphrase")) {
SSL_CTX_set_default_passwd_cb_userdata(sslsock->ctx, stream);
SSL_CTX_set_default_passwd_cb(sslsock->ctx, php_openssl_passwd_callback);
}
GET_VER_OPT_STRING("ciphers", cipherlist);
#ifndef USE_OPENSSL_SYSTEM_CIPHERS
if (!cipherlist) {
cipherlist = OPENSSL_DEFAULT_STREAM_CIPHERS;
}
#endif
if (cipherlist) {
if (SSL_CTX_set_cipher_list(sslsock->ctx, cipherlist) != 1) {
return FAILURE;
}
}
if (GET_VER_OPT("security_level")) {
#ifdef HAVE_SEC_LEVEL
zend_long lval = zval_get_long(val);
if (lval < 0 || lval > 5) {
php_error_docref(NULL, E_WARNING, "Security level must be between 0 and 5");
}
SSL_CTX_set_security_level(sslsock->ctx, lval);
#else
php_error_docref(NULL, E_WARNING,
"security_level is not supported by the linked OpenSSL library "
"- it is supported from version 1.1.0");
#endif
}
GET_VER_OPT_STRING("alpn_protocols", alpn_protocols);
if (alpn_protocols) {
#ifdef HAVE_TLS_ALPN
{
unsigned short alpn_len;
unsigned char *alpn = php_openssl_alpn_protos_parse(&alpn_len, alpn_protocols);
if (alpn == NULL) {
php_error_docref(NULL, E_WARNING, "Failed parsing comma-separated TLS ALPN protocol string");
SSL_CTX_free(sslsock->ctx);
sslsock->ctx = NULL;
return FAILURE;
}
if (sslsock->is_client) {
SSL_CTX_set_alpn_protos(sslsock->ctx, alpn, alpn_len);
} else {
sslsock->alpn_ctx.data = (unsigned char *) pestrndup((const char*)alpn, alpn_len, php_stream_is_persistent(stream));
sslsock->alpn_ctx.len = alpn_len;
SSL_CTX_set_alpn_select_cb(sslsock->ctx, php_openssl_server_alpn_callback, sslsock);
}
efree(alpn);
}
#else
php_error_docref(NULL, E_WARNING,
"alpn_protocols support is not compiled into the OpenSSL library against which PHP is linked");
#endif
}
if (FAILURE == php_openssl_set_local_cert(sslsock->ctx, stream)) {
return FAILURE;
}
SSL_CTX_set_options(sslsock->ctx, ssl_ctx_options);
#if PHP_OPENSSL_API_VERSION >= 0x10100
SSL_CTX_set_min_proto_version(sslsock->ctx, php_openssl_get_min_proto_version(method_flags));
SSL_CTX_set_max_proto_version(sslsock->ctx, php_openssl_get_max_proto_version(method_flags));
#endif
if (sslsock->is_client == 0 &&
PHP_STREAM_CONTEXT(stream) &&
FAILURE == php_openssl_set_server_specific_opts(stream, sslsock->ctx)
) {
return FAILURE;
}
sslsock->ssl_handle = SSL_new(sslsock->ctx);
if (sslsock->ssl_handle == NULL) {
php_error_docref(NULL, E_WARNING, "SSL handle creation failure");
SSL_CTX_free(sslsock->ctx);
sslsock->ctx = NULL;
#ifdef HAVE_TLS_ALPN
if (sslsock->alpn_ctx.data) {
pefree(sslsock->alpn_ctx.data, php_stream_is_persistent(stream));
sslsock->alpn_ctx.data = NULL;
}
#endif
return FAILURE;
} else {
SSL_set_ex_data(sslsock->ssl_handle, php_openssl_get_ssl_stream_data_index(), stream);
}
if (!SSL_set_fd(sslsock->ssl_handle, sslsock->s.socket)) {
php_openssl_handle_ssl_error(stream, 0, 1);
}
#ifdef HAVE_TLS_SNI
/* Enable server-side SNI */
if (!sslsock->is_client && php_openssl_enable_server_sni(stream, sslsock) == FAILURE) {
return FAILURE;
}
#endif
/* Enable server-side handshake renegotiation rate-limiting */
if (!sslsock->is_client) {
php_openssl_init_server_reneg_limit(stream, sslsock);
}
#ifdef SSL_MODE_RELEASE_BUFFERS
SSL_set_mode(sslsock->ssl_handle, SSL_get_mode(sslsock->ssl_handle) | SSL_MODE_RELEASE_BUFFERS);
#endif
if (cparam->inputs.session) {
if (cparam->inputs.session->ops != &php_openssl_socket_ops) {
php_error_docref(NULL, E_WARNING, "supplied session stream must be an SSL enabled stream");
} else if (((php_openssl_netstream_data_t*)cparam->inputs.session->abstract)->ssl_handle == NULL) {
php_error_docref(NULL, E_WARNING, "supplied SSL session stream is not initialized");
} else {
SSL_copy_session_id(sslsock->ssl_handle, ((php_openssl_netstream_data_t*)cparam->inputs.session->abstract)->ssl_handle);
}
}
return SUCCESS;
}
/* }}} */
static zend_array *php_openssl_capture_session_meta(SSL *ssl_handle) /* {{{ */
{
zval meta_arr;
char *proto_str;
long proto = SSL_version(ssl_handle);
const SSL_CIPHER *cipher = SSL_get_current_cipher(ssl_handle);
char version_str[PHP_SSL_MAX_VERSION_LEN];
switch (proto) {
#ifdef HAVE_TLS13
case TLS1_3_VERSION:
proto_str = "TLSv1.3";
break;
#endif
#ifdef HAVE_TLS12
case TLS1_2_VERSION:
proto_str = "TLSv1.2";
break;
#endif
#ifdef HAVE_TLS11
case TLS1_1_VERSION:
proto_str = "TLSv1.1";
break;
#endif
case TLS1_VERSION:
proto_str = "TLSv1";
break;
#ifdef HAVE_SSL3
case SSL3_VERSION:
proto_str = "SSLv3";
break;
#endif
default: proto_str = "UNKNOWN";
}
array_init(&meta_arr);
add_assoc_string(&meta_arr, "protocol", proto_str);
add_assoc_string(&meta_arr, "cipher_name", (char *) SSL_CIPHER_get_name(cipher));
add_assoc_long(&meta_arr, "cipher_bits", SSL_CIPHER_get_bits(cipher, NULL));
add_assoc_string(&meta_arr, "cipher_version",
php_openssl_cipher_get_version(cipher, version_str, PHP_SSL_MAX_VERSION_LEN));
return Z_ARR(meta_arr);
}
/* }}} */
static int php_openssl_capture_peer_certs(php_stream *stream,
php_openssl_netstream_data_t *sslsock, X509 *peer_cert) /* {{{ */
{
zval *val, zcert;
int cert_captured = 0;
if (NULL != (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream),
"ssl", "capture_peer_cert")) &&
zend_is_true(val)
) {
ZVAL_RES(&zcert, zend_register_resource(peer_cert, php_openssl_get_x509_list_id()));
php_stream_context_set_option(PHP_STREAM_CONTEXT(stream), "ssl", "peer_certificate", &zcert);
zval_ptr_dtor(&zcert);
cert_captured = 1;
}
if (NULL != (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream),
"ssl", "capture_peer_cert_chain")) &&
zend_is_true(val)
) {
zval arr;
STACK_OF(X509) *chain;
chain = SSL_get_peer_cert_chain(sslsock->ssl_handle);
if (chain && sk_X509_num(chain) > 0) {
int i;
array_init(&arr);
for (i = 0; i < sk_X509_num(chain); i++) {
X509 *mycert = X509_dup(sk_X509_value(chain, i));
ZVAL_RES(&zcert, zend_register_resource(mycert, php_openssl_get_x509_list_id()));
add_next_index_zval(&arr, &zcert);
}
} else {
ZVAL_NULL(&arr);
}
php_stream_context_set_option(PHP_STREAM_CONTEXT(stream), "ssl", "peer_certificate_chain", &arr);
zval_ptr_dtor(&arr);
}
return cert_captured;
}
/* }}} */
static int php_openssl_enable_crypto(php_stream *stream,
php_openssl_netstream_data_t *sslsock,
php_stream_xport_crypto_param *cparam) /* {{{ */
{
int n;
int retry = 1;
int cert_captured = 0;
X509 *peer_cert;
if (cparam->inputs.activate && !sslsock->ssl_active) {
struct timeval start_time, *timeout;
int blocked = sslsock->s.is_blocked, has_timeout = 0;
#ifdef HAVE_TLS_SNI
if (sslsock->is_client) {
php_openssl_enable_client_sni(stream, sslsock);
}
#endif
if (!sslsock->state_set) {
if (sslsock->is_client) {
SSL_set_connect_state(sslsock->ssl_handle);
} else {
SSL_set_accept_state(sslsock->ssl_handle);
}
sslsock->state_set = 1;
}
if (SUCCESS == php_set_sock_blocking(sslsock->s.socket, 0)) {
sslsock->s.is_blocked = 0;
/* The following mode are added only if we are able to change socket
* to non blocking mode which is also used for read and write */
SSL_set_mode(
sslsock->ssl_handle,
(
SSL_get_mode(sslsock->ssl_handle) |
SSL_MODE_ENABLE_PARTIAL_WRITE |
SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
)
);
}
timeout = sslsock->is_client ? &sslsock->connect_timeout : &sslsock->s.timeout;
has_timeout = !sslsock->s.is_blocked && (timeout->tv_sec || timeout->tv_usec);
/* gettimeofday is not monotonic; using it here is not strictly correct */
if (has_timeout) {
gettimeofday(&start_time, NULL);
}
do {
struct timeval cur_time, elapsed_time;
if (sslsock->is_client) {
n = SSL_connect(sslsock->ssl_handle);
} else {
n = SSL_accept(sslsock->ssl_handle);
}
if (has_timeout) {
gettimeofday(&cur_time, NULL);
elapsed_time = php_openssl_subtract_timeval(cur_time, start_time);
if (php_openssl_compare_timeval( elapsed_time, *timeout) > 0) {
php_error_docref(NULL, E_WARNING, "SSL: Handshake timed out");
return -1;
}
}
if (n <= 0) {
/* in case of SSL_ERROR_WANT_READ/WRITE, do not retry in non-blocking mode */
retry = php_openssl_handle_ssl_error(stream, n, blocked);
if (retry) {
/* wait until something interesting happens in the socket. It may be a
* timeout. Also consider the unlikely of possibility of a write block */
int err = SSL_get_error(sslsock->ssl_handle, n);
struct timeval left_time;
if (has_timeout) {
left_time = php_openssl_subtract_timeval(*timeout, elapsed_time);
}
php_pollfd_for(sslsock->s.socket, (err == SSL_ERROR_WANT_READ) ?
(POLLIN|POLLPRI) : POLLOUT, has_timeout ? &left_time : NULL);
}
} else {
retry = 0;
}
} while (retry);
if (sslsock->s.is_blocked != blocked && SUCCESS == php_set_sock_blocking(sslsock->s.socket, blocked)) {
sslsock->s.is_blocked = blocked;
}
if (n == 1) {
peer_cert = SSL_get_peer_certificate(sslsock->ssl_handle);
if (peer_cert && PHP_STREAM_CONTEXT(stream)) {
cert_captured = php_openssl_capture_peer_certs(stream, sslsock, peer_cert);
}
if (FAILURE == php_openssl_apply_peer_verification_policy(sslsock->ssl_handle, peer_cert, stream)) {
SSL_shutdown(sslsock->ssl_handle);
n = -1;
} else {
sslsock->ssl_active = 1;
if (PHP_STREAM_CONTEXT(stream)) {
zval *val;
if (NULL != (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream),
"ssl", "capture_session_meta"))
) {
php_error(E_DEPRECATED,
"capture_session_meta is deprecated; its information is now available via stream_get_meta_data()"
);
}
if (val && zend_is_true(val)) {
zval meta_arr;
ZVAL_ARR(&meta_arr, php_openssl_capture_session_meta(sslsock->ssl_handle));
php_stream_context_set_option(PHP_STREAM_CONTEXT(stream), "ssl", "session_meta", &meta_arr);
zval_ptr_dtor(&meta_arr);
}
}
}
} else if (errno == EAGAIN) {
n = 0;
} else {
n = -1;
/* We want to capture the peer cert even if verification fails*/
peer_cert = SSL_get_peer_certificate(sslsock->ssl_handle);
if (peer_cert && PHP_STREAM_CONTEXT(stream)) {
cert_captured = php_openssl_capture_peer_certs(stream, sslsock, peer_cert);
}
}
if (n && peer_cert && cert_captured == 0) {
X509_free(peer_cert);
}
return n;
} else if (!cparam->inputs.activate && sslsock->ssl_active) {
/* deactivate - common for server/client */
SSL_shutdown(sslsock->ssl_handle);
sslsock->ssl_active = 0;
}
return -1;
}
/* }}} */
static size_t php_openssl_sockop_read(php_stream *stream, char *buf, size_t count) /* {{{ */
{
return php_openssl_sockop_io( 1, stream, buf, count );
}
/* }}} */
static size_t php_openssl_sockop_write(php_stream *stream, const char *buf, size_t count) /* {{{ */
{
return php_openssl_sockop_io( 0, stream, (char*)buf, count );
}
/* }}} */
/**
* Factored out common functionality (blocking, timeout, loop management) for read and write.
* Perform IO (read or write) to an SSL socket. If we have a timeout, we switch to non-blocking mode
* for the duration of the operation, using select to do our waits. If we time out, or we have an error
* report that back to PHP
*/
static size_t php_openssl_sockop_io(int read, php_stream *stream, char *buf, size_t count) /* {{{ */
{
php_openssl_netstream_data_t *sslsock = (php_openssl_netstream_data_t*)stream->abstract;
/* Only do this if SSL is active. */
if (sslsock->ssl_active) {
int retry = 1;
struct timeval start_time;
struct timeval *timeout = NULL;
int began_blocked = sslsock->s.is_blocked;
int has_timeout = 0;
int nr_bytes = 0;
/* prevent overflow in openssl */
if (count > INT_MAX) {
count = INT_MAX;
}
/* never use a timeout with non-blocking sockets */
if (began_blocked) {
timeout = &sslsock->s.timeout;
}
if (timeout && php_set_sock_blocking(sslsock->s.socket, 0) == SUCCESS) {
sslsock->s.is_blocked = 0;
}
if (!sslsock->s.is_blocked && timeout && (timeout->tv_sec || timeout->tv_usec)) {
has_timeout = 1;
/* gettimeofday is not monotonic; using it here is not strictly correct */
gettimeofday(&start_time, NULL);
}
/* Main IO loop. */
do {
struct timeval cur_time, elapsed_time, left_time;
/* If we have a timeout to check, figure out how much time has elapsed since we started. */
if (has_timeout) {
gettimeofday(&cur_time, NULL);
/* Determine how much time we've taken so far. */
elapsed_time = php_openssl_subtract_timeval(cur_time, start_time);
/* and return an error if we've taken too long. */
if (php_openssl_compare_timeval(elapsed_time, *timeout) > 0 ) {
/* If the socket was originally blocking, set it back. */
if (began_blocked) {
php_set_sock_blocking(sslsock->s.socket, 1);
sslsock->s.is_blocked = 1;
}
sslsock->s.timeout_event = 1;
return -1;
}
}
/* Now, do the IO operation. Don't block if we can't complete... */
if (read) {
nr_bytes = SSL_read(sslsock->ssl_handle, buf, (int)count);
if (sslsock->reneg && sslsock->reneg->should_close) {
/* renegotiation rate limiting triggered */
php_stream_xport_shutdown(stream, (stream_shutdown_t)SHUT_RDWR);
nr_bytes = 0;
stream->eof = 1;
break;
}
} else {
nr_bytes = SSL_write(sslsock->ssl_handle, buf, (int)count);
}
/* Now, how much time until we time out? */
if (has_timeout) {
left_time = php_openssl_subtract_timeval( *timeout, elapsed_time );
}
/* If we didn't do anything on the last loop (or an error) check to see if we should retry or exit. */
if (nr_bytes <= 0) {
/* Get the error code from SSL, and check to see if it's an error or not. */
int err = SSL_get_error(sslsock->ssl_handle, nr_bytes );
retry = php_openssl_handle_ssl_error(stream, nr_bytes, 0);
/* If we get this (the above doesn't check) then we'll retry as well. */
if (errno == EAGAIN && err == SSL_ERROR_WANT_READ && read) {
retry = 1;
}
if (errno == EAGAIN && err == SSL_ERROR_WANT_WRITE && read == 0) {
retry = 1;
}
/* Also, on reads, we may get this condition on an EOF. We should check properly. */
if (read) {
stream->eof = (retry == 0 && errno != EAGAIN && !SSL_pending(sslsock->ssl_handle));
}
/* Don't loop indefinitely in non-blocking mode if no data is available */
if (began_blocked == 0) {
break;
}
/* Now, if we have to wait some time, and we're supposed to be blocking, wait for the socket to become
* available. Now, php_pollfd_for uses select to wait up to our time_left value only...
*/
if (retry) {
if (read) {
php_pollfd_for(sslsock->s.socket, (err == SSL_ERROR_WANT_WRITE) ?
(POLLOUT|POLLPRI) : (POLLIN|POLLPRI), has_timeout ? &left_time : NULL);
} else {
php_pollfd_for(sslsock->s.socket, (err == SSL_ERROR_WANT_READ) ?
(POLLIN|POLLPRI) : (POLLOUT|POLLPRI), has_timeout ? &left_time : NULL);
}
}
} else {
/* Else, if we got bytes back, check for possible errors. */
int err = SSL_get_error(sslsock->ssl_handle, nr_bytes);
/* If we didn't get any error, then let's return it to PHP. */
if (err == SSL_ERROR_NONE) {
break;
}
/* Otherwise, we need to wait again (up to time_left or we get an error) */
if (began_blocked) {
if (read) {
php_pollfd_for(sslsock->s.socket, (err == SSL_ERROR_WANT_WRITE) ?
(POLLOUT|POLLPRI) : (POLLIN|POLLPRI), has_timeout ? &left_time : NULL);
} else {
php_pollfd_for(sslsock->s.socket, (err == SSL_ERROR_WANT_READ) ?
(POLLIN|POLLPRI) : (POLLOUT|POLLPRI), has_timeout ? &left_time : NULL);
}
}
}
/* Finally, we keep going until we got data, and an SSL_ERROR_NONE, unless we had an error. */
} while (retry);
/* Tell PHP if we read / wrote bytes. */
if (nr_bytes > 0) {
php_stream_notify_progress_increment(PHP_STREAM_CONTEXT(stream), nr_bytes, 0);
}
/* And if we were originally supposed to be blocking, let's reset the socket to that. */
if (began_blocked && php_set_sock_blocking(sslsock->s.socket, 1) == SUCCESS) {
sslsock->s.is_blocked = 1;
}
return 0 > nr_bytes ? 0 : nr_bytes;
} else {
size_t nr_bytes = 0;
/* This block is if we had no timeout... We will just sit and wait forever on the IO operation. */
if (read) {
nr_bytes = php_stream_socket_ops.read(stream, buf, count);
} else {
nr_bytes = php_stream_socket_ops.write(stream, buf, count);
}
return nr_bytes;
}
}
/* }}} */
static struct timeval php_openssl_subtract_timeval(struct timeval a, struct timeval b) /* {{{ */
{
struct timeval difference;
difference.tv_sec = a.tv_sec - b.tv_sec;
difference.tv_usec = a.tv_usec - b.tv_usec;
if (a.tv_usec < b.tv_usec) {
b.tv_sec -= 1L;
b.tv_usec += 1000000L;
}
return difference;
}
/* }}} */
static int php_openssl_compare_timeval( struct timeval a, struct timeval b )
{
if (a.tv_sec > b.tv_sec || (a.tv_sec == b.tv_sec && a.tv_usec > b.tv_usec) ) {
return 1;
} else if( a.tv_sec == b.tv_sec && a.tv_usec == b.tv_usec ) {
return 0;
} else {
return -1;
}
}
static int php_openssl_sockop_close(php_stream *stream, int close_handle) /* {{{ */
{
php_openssl_netstream_data_t *sslsock = (php_openssl_netstream_data_t*)stream->abstract;
#ifdef PHP_WIN32
int n;
#endif
unsigned i;
if (close_handle) {
if (sslsock->ssl_active) {
SSL_shutdown(sslsock->ssl_handle);
sslsock->ssl_active = 0;
}
if (sslsock->ssl_handle) {
SSL_free(sslsock->ssl_handle);
sslsock->ssl_handle = NULL;
}
if (sslsock->ctx) {
SSL_CTX_free(sslsock->ctx);
sslsock->ctx = NULL;
}
#ifdef HAVE_TLS_ALPN
if (sslsock->alpn_ctx.data) {
pefree(sslsock->alpn_ctx.data, php_stream_is_persistent(stream));
}
#endif
#ifdef PHP_WIN32
if (sslsock->s.socket == -1)
sslsock->s.socket = SOCK_ERR;
#endif
if (sslsock->s.socket != SOCK_ERR) {
#ifdef PHP_WIN32
/* prevent more data from coming in */
shutdown(sslsock->s.socket, SHUT_RD);
/* try to make sure that the OS sends all data before we close the connection.
* Essentially, we are waiting for the socket to become writeable, which means
* that all pending data has been sent.
* We use a small timeout which should encourage the OS to send the data,
* but at the same time avoid hanging indefinitely.
* */
do {
n = php_pollfd_for_ms(sslsock->s.socket, POLLOUT, 500);
} while (n == -1 && php_socket_errno() == EINTR);
#endif
closesocket(sslsock->s.socket);
sslsock->s.socket = SOCK_ERR;
}
}
if (sslsock->sni_certs) {
for (i = 0; i < sslsock->sni_cert_count; i++) {
if (sslsock->sni_certs[i].ctx) {
SSL_CTX_free(sslsock->sni_certs[i].ctx);
pefree(sslsock->sni_certs[i].name, php_stream_is_persistent(stream));
}
}
pefree(sslsock->sni_certs, php_stream_is_persistent(stream));
sslsock->sni_certs = NULL;
}
if (sslsock->url_name) {
pefree(sslsock->url_name, php_stream_is_persistent(stream));
}
if (sslsock->reneg) {
pefree(sslsock->reneg, php_stream_is_persistent(stream));
}
pefree(sslsock, php_stream_is_persistent(stream));
return 0;
}
/* }}} */
static int php_openssl_sockop_flush(php_stream *stream) /* {{{ */
{
return php_stream_socket_ops.flush(stream);
}
/* }}} */
static int php_openssl_sockop_stat(php_stream *stream, php_stream_statbuf *ssb) /* {{{ */
{
return php_stream_socket_ops.stat(stream, ssb);
}
/* }}} */
static inline int php_openssl_tcp_sockop_accept(php_stream *stream, php_openssl_netstream_data_t *sock,
php_stream_xport_param *xparam STREAMS_DC) /* {{{ */
{
int clisock;
zend_bool nodelay = 0;
zval *tmpzval = NULL;
xparam->outputs.client = NULL;
if ((tmpzval = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "socket", "tcp_nodelay")) != NULL &&
zend_is_true(tmpzval)) {
nodelay = 1;
}
clisock = php_network_accept_incoming(sock->s.socket,
xparam->want_textaddr ? &xparam->outputs.textaddr : NULL,
xparam->want_addr ? &xparam->outputs.addr : NULL,
xparam->want_addr ? &xparam->outputs.addrlen : NULL,
xparam->inputs.timeout,
xparam->want_errortext ? &xparam->outputs.error_text : NULL,
&xparam->outputs.error_code,
nodelay);
if (clisock >= 0) {
php_openssl_netstream_data_t *clisockdata = (php_openssl_netstream_data_t*) emalloc(sizeof(*clisockdata));
/* copy underlying tcp fields */
memset(clisockdata, 0, sizeof(*clisockdata));
memcpy(clisockdata, sock, sizeof(clisockdata->s));
clisockdata->s.socket = clisock;
xparam->outputs.client = php_stream_alloc_rel(stream->ops, clisockdata, NULL, "r+");
if (xparam->outputs.client) {
xparam->outputs.client->ctx = stream->ctx;
if (stream->ctx) {
GC_ADDREF(stream->ctx);
}
}
if (xparam->outputs.client && sock->enable_on_connect) {
/* remove the client bit */
if (sock->method & STREAM_CRYPTO_IS_CLIENT) {
sock->method = ((sock->method >> 1) << 1);
}
clisockdata->method = sock->method;
if (php_stream_xport_crypto_setup(xparam->outputs.client, clisockdata->method,
NULL) < 0 || php_stream_xport_crypto_enable(
xparam->outputs.client, 1) < 0) {
php_error_docref(NULL, E_WARNING, "Failed to enable crypto");
php_stream_close(xparam->outputs.client);
xparam->outputs.client = NULL;
xparam->outputs.returncode = -1;
}
}
}
return xparam->outputs.client == NULL ? -1 : 0;
}
/* }}} */
static int php_openssl_sockop_set_option(php_stream *stream, int option, int value, void *ptrparam) /* {{{ */
{
php_openssl_netstream_data_t *sslsock = (php_openssl_netstream_data_t*)stream->abstract;
php_stream_xport_crypto_param *cparam = (php_stream_xport_crypto_param *)ptrparam;
php_stream_xport_param *xparam = (php_stream_xport_param *)ptrparam;
switch (option) {
case PHP_STREAM_OPTION_META_DATA_API:
if (sslsock->ssl_active) {
zval tmp;
char *proto_str;
char version_str[PHP_SSL_MAX_VERSION_LEN];
const SSL_CIPHER *cipher;
array_init(&tmp);
switch (SSL_version(sslsock->ssl_handle)) {
#ifdef HAVE_TLS13
case TLS1_3_VERSION: proto_str = "TLSv1.3"; break;
#endif
#ifdef HAVE_TLS12
case TLS1_2_VERSION: proto_str = "TLSv1.2"; break;
#endif
#ifdef HAVE_TLS11
case TLS1_1_VERSION: proto_str = "TLSv1.1"; break;
#endif
case TLS1_VERSION: proto_str = "TLSv1"; break;
#ifdef HAVE_SSL3
case SSL3_VERSION: proto_str = "SSLv3"; break;
#endif
default: proto_str = "UNKNOWN";
}
cipher = SSL_get_current_cipher(sslsock->ssl_handle);
add_assoc_string(&tmp, "protocol", proto_str);
add_assoc_string(&tmp, "cipher_name", (char *) SSL_CIPHER_get_name(cipher));
add_assoc_long(&tmp, "cipher_bits", SSL_CIPHER_get_bits(cipher, NULL));
add_assoc_string(&tmp, "cipher_version",
php_openssl_cipher_get_version(cipher, version_str, PHP_SSL_MAX_VERSION_LEN));
#ifdef HAVE_TLS_ALPN
{
const unsigned char *alpn_proto = NULL;
unsigned int alpn_proto_len = 0;
SSL_get0_alpn_selected(sslsock->ssl_handle, &alpn_proto, &alpn_proto_len);
if (alpn_proto) {
add_assoc_stringl(&tmp, "alpn_protocol", (char *)alpn_proto, alpn_proto_len);
}
}
#endif
add_assoc_zval((zval *)ptrparam, "crypto", &tmp);
}
add_assoc_bool((zval *)ptrparam, "timed_out", sslsock->s.timeout_event);
add_assoc_bool((zval *)ptrparam, "blocked", sslsock->s.is_blocked);
add_assoc_bool((zval *)ptrparam, "eof", stream->eof);
return PHP_STREAM_OPTION_RETURN_OK;
case PHP_STREAM_OPTION_CHECK_LIVENESS:
{
struct timeval tv;
char buf;
int alive = 1;
if (value == -1) {
if (sslsock->s.timeout.tv_sec == -1) {
#ifdef _WIN32
tv.tv_sec = (long)FG(default_socket_timeout);
#else
tv.tv_sec = (time_t)FG(default_socket_timeout);
#endif
tv.tv_usec = 0;
} else {
tv = sslsock->connect_timeout;
}
} else {
tv.tv_sec = value;
tv.tv_usec = 0;
}
if (sslsock->s.socket == -1) {
alive = 0;
} else if (php_pollfd_for(sslsock->s.socket, PHP_POLLREADABLE|POLLPRI, &tv) > 0) {
if (sslsock->ssl_active) {
int n = SSL_peek(sslsock->ssl_handle, &buf, sizeof(buf));
if (n <= 0) {
int err = SSL_get_error(sslsock->ssl_handle, n);
switch (err) {
case SSL_ERROR_SYSCALL:
alive = php_socket_errno() == EAGAIN;
break;
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE:
alive = 1;
break;
default:
/* any other problem is a fatal error */
alive = 0;
}
}
} else if (0 == recv(sslsock->s.socket, &buf, sizeof(buf), MSG_PEEK) && php_socket_errno() != EAGAIN) {
alive = 0;
}
}
return alive ? PHP_STREAM_OPTION_RETURN_OK : PHP_STREAM_OPTION_RETURN_ERR;
}
case PHP_STREAM_OPTION_CRYPTO_API:
switch(cparam->op) {
case STREAM_XPORT_CRYPTO_OP_SETUP:
cparam->outputs.returncode = php_openssl_setup_crypto(stream, sslsock, cparam);
return PHP_STREAM_OPTION_RETURN_OK;
break;
case STREAM_XPORT_CRYPTO_OP_ENABLE:
cparam->outputs.returncode = php_openssl_enable_crypto(stream, sslsock, cparam);
return PHP_STREAM_OPTION_RETURN_OK;
break;
default:
/* fall through */
break;
}
break;
case PHP_STREAM_OPTION_XPORT_API:
switch(xparam->op) {
case STREAM_XPORT_OP_CONNECT:
case STREAM_XPORT_OP_CONNECT_ASYNC:
/* TODO: Async connects need to check the enable_on_connect option when
* we notice that the connect has actually been established */
php_stream_socket_ops.set_option(stream, option, value, ptrparam);
if ((sslsock->enable_on_connect) &&
((xparam->outputs.returncode == 0) ||
(xparam->op == STREAM_XPORT_OP_CONNECT_ASYNC &&
xparam->outputs.returncode == 1 && xparam->outputs.error_code == EINPROGRESS)))
{
if (php_stream_xport_crypto_setup(stream, sslsock->method, NULL) < 0 ||
php_stream_xport_crypto_enable(stream, 1) < 0) {
php_error_docref(NULL, E_WARNING, "Failed to enable crypto");
xparam->outputs.returncode = -1;
}
}
return PHP_STREAM_OPTION_RETURN_OK;
case STREAM_XPORT_OP_ACCEPT:
/* we need to copy the additional fields that the underlying tcp transport
* doesn't know about */
xparam->outputs.returncode = php_openssl_tcp_sockop_accept(stream, sslsock, xparam STREAMS_CC);
return PHP_STREAM_OPTION_RETURN_OK;
default:
/* fall through */
break;
}
}
return php_stream_socket_ops.set_option(stream, option, value, ptrparam);
}
/* }}} */
static int php_openssl_sockop_cast(php_stream *stream, int castas, void **ret) /* {{{ */
{
php_openssl_netstream_data_t *sslsock = (php_openssl_netstream_data_t*)stream->abstract;
switch(castas) {
case PHP_STREAM_AS_STDIO:
if (sslsock->ssl_active) {
return FAILURE;
}
if (ret) {
*ret = fdopen(sslsock->s.socket, stream->mode);
if (*ret) {
return SUCCESS;
}
return FAILURE;
}
return SUCCESS;
case PHP_STREAM_AS_FD_FOR_SELECT:
if (ret) {
size_t pending;
if (stream->writepos == stream->readpos
&& sslsock->ssl_active
&& (pending = (size_t)SSL_pending(sslsock->ssl_handle)) > 0) {
php_stream_fill_read_buffer(stream, pending < stream->chunk_size
? pending
: stream->chunk_size);
}
*(php_socket_t *)ret = sslsock->s.socket;
}
return SUCCESS;
case PHP_STREAM_AS_FD:
case PHP_STREAM_AS_SOCKETD:
if (sslsock->ssl_active) {
return FAILURE;
}
if (ret) {
*(php_socket_t *)ret = sslsock->s.socket;
}
return SUCCESS;
default:
return FAILURE;
}
}
/* }}} */
const php_stream_ops php_openssl_socket_ops = {
php_openssl_sockop_write, php_openssl_sockop_read,
php_openssl_sockop_close, php_openssl_sockop_flush,
"tcp_socket/ssl",
NULL, /* seek */
php_openssl_sockop_cast,
php_openssl_sockop_stat,
php_openssl_sockop_set_option,
};
static zend_long php_openssl_get_crypto_method(
php_stream_context *ctx, zend_long crypto_method) /* {{{ */
{
zval *val;
if (ctx && (val = php_stream_context_get_option(ctx, "ssl", "crypto_method")) != NULL) {
crypto_method = zval_get_long(val);
crypto_method |= STREAM_CRYPTO_IS_CLIENT;
}
return crypto_method;
}
/* }}} */
static char *php_openssl_get_url_name(const char *resourcename,
size_t resourcenamelen, int is_persistent) /* {{{ */
{
php_url *url;
if (!resourcename) {
return NULL;
}
url = php_url_parse_ex(resourcename, resourcenamelen);
if (!url) {
return NULL;
}
if (url->host) {
const char * host = ZSTR_VAL(url->host);
char * url_name = NULL;
size_t len = ZSTR_LEN(url->host);
/* skip trailing dots */
while (len && host[len-1] == '.') {
--len;
}
if (len) {
url_name = pestrndup(host, len, is_persistent);
}
php_url_free(url);
return url_name;
}
php_url_free(url);
return NULL;
}
/* }}} */
php_stream *php_openssl_ssl_socket_factory(const char *proto, size_t protolen,
const char *resourcename, size_t resourcenamelen,
const char *persistent_id, int options, int flags,
struct timeval *timeout,
php_stream_context *context STREAMS_DC) /* {{{ */
{
php_stream *stream = NULL;
php_openssl_netstream_data_t *sslsock = NULL;
sslsock = pemalloc(sizeof(php_openssl_netstream_data_t), persistent_id ? 1 : 0);
memset(sslsock, 0, sizeof(*sslsock));
sslsock->s.is_blocked = 1;
/* this timeout is used by standard stream funcs, therefor it should use the default value */
#ifdef _WIN32
sslsock->s.timeout.tv_sec = (long)FG(default_socket_timeout);
#else
sslsock->s.timeout.tv_sec = (time_t)FG(default_socket_timeout);
#endif
sslsock->s.timeout.tv_usec = 0;
/* use separate timeout for our private funcs */
sslsock->connect_timeout.tv_sec = timeout->tv_sec;
sslsock->connect_timeout.tv_usec = timeout->tv_usec;
/* we don't know the socket until we have determined if we are binding or
* connecting */
sslsock->s.socket = -1;
/* Initialize context as NULL */
sslsock->ctx = NULL;
stream = php_stream_alloc_rel(&php_openssl_socket_ops, sslsock, persistent_id, "r+");
if (stream == NULL) {
pefree(sslsock, persistent_id ? 1 : 0);
return NULL;
}
if (strncmp(proto, "ssl", protolen) == 0) {
sslsock->enable_on_connect = 1;
sslsock->method = php_openssl_get_crypto_method(context, STREAM_CRYPTO_METHOD_TLS_ANY_CLIENT);
} else if (strncmp(proto, "sslv2", protolen) == 0) {
php_error_docref(NULL, E_WARNING, "SSLv2 unavailable in this PHP version");
php_stream_close(stream);
return NULL;
} else if (strncmp(proto, "sslv3", protolen) == 0) {
#ifdef HAVE_SSL3
sslsock->enable_on_connect = 1;
sslsock->method = STREAM_CRYPTO_METHOD_SSLv3_CLIENT;
#else
php_error_docref(NULL, E_WARNING,
"SSLv3 support is not compiled into the OpenSSL library against which PHP is linked");
php_stream_close(stream);
return NULL;
#endif
} else if (strncmp(proto, "tls", protolen) == 0) {
sslsock->enable_on_connect = 1;
sslsock->method = php_openssl_get_crypto_method(context, STREAM_CRYPTO_METHOD_TLS_ANY_CLIENT);
} else if (strncmp(proto, "tlsv1.0", protolen) == 0) {
sslsock->enable_on_connect = 1;
sslsock->method = STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT;
} else if (strncmp(proto, "tlsv1.1", protolen) == 0) {
#ifdef HAVE_TLS11
sslsock->enable_on_connect = 1;
sslsock->method = STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT;
#else
php_error_docref(NULL, E_WARNING,
"TLSv1.1 support is not compiled into the OpenSSL library against which PHP is linked");
php_stream_close(stream);
return NULL;
#endif
} else if (strncmp(proto, "tlsv1.2", protolen) == 0) {
#ifdef HAVE_TLS12
sslsock->enable_on_connect = 1;
sslsock->method = STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT;
#else
php_error_docref(NULL, E_WARNING,
"TLSv1.2 support is not compiled into the OpenSSL library against which PHP is linked");
php_stream_close(stream);
return NULL;
#endif
} else if (strncmp(proto, "tlsv1.3", protolen) == 0) {
#ifdef HAVE_TLS13
sslsock->enable_on_connect = 1;
sslsock->method = STREAM_CRYPTO_METHOD_TLSv1_3_CLIENT;
#else
php_error_docref(NULL, E_WARNING,
"TLSv1.3 support is not compiled into the OpenSSL library against which PHP is linked");
php_stream_close(stream);
return NULL;
#endif
}
sslsock->url_name = php_openssl_get_url_name(resourcename, resourcenamelen, !!persistent_id);
return stream;
}
/* }}} */
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