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/*
 * Copyright 2008 Hans Leidekker for CodeWeavers
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 * Copyright 2013 Jacek Caban for CodeWeavers
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 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include "wine/port.h"

#include <stdarg.h>
#include <stdio.h>
#include <errno.h>
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#include <assert.h>
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#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
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#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
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#ifdef HAVE_POLL_H
# include <poll.h>
#endif

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#define NONAMELESSUNION

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#include "wine/debug.h"
#include "wine/library.h"

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#include "windef.h"
#include "winbase.h"
#include "winhttp.h"
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#include "wincrypt.h"
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#include "schannel.h"
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#include "winhttp_private.h"

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/* to avoid conflicts with the Unix socket headers */
#define USE_WS_PREFIX
#include "winsock2.h"

WINE_DEFAULT_DEBUG_CHANNEL(winhttp);

#ifndef HAVE_GETADDRINFO

/* critical section to protect non-reentrant gethostbyname() */
static CRITICAL_SECTION cs_gethostbyname;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
    0, 0, &cs_gethostbyname,
    { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
      0, 0, { (DWORD_PTR)(__FILE__ ": cs_gethostbyname") }
};
static CRITICAL_SECTION cs_gethostbyname = { &critsect_debug, -1, 0, 0, 0, 0 };

#endif

/* translate a unix error code into a winsock error code */
static int sock_get_error( int err )
{
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#if !defined(__MINGW32__) && !defined (_MSC_VER)
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    switch (err)
    {
        case EINTR:             return WSAEINTR;
        case EBADF:             return WSAEBADF;
        case EPERM:
        case EACCES:            return WSAEACCES;
        case EFAULT:            return WSAEFAULT;
        case EINVAL:            return WSAEINVAL;
        case EMFILE:            return WSAEMFILE;
        case EWOULDBLOCK:       return WSAEWOULDBLOCK;
        case EINPROGRESS:       return WSAEINPROGRESS;
        case EALREADY:          return WSAEALREADY;
        case ENOTSOCK:          return WSAENOTSOCK;
        case EDESTADDRREQ:      return WSAEDESTADDRREQ;
        case EMSGSIZE:          return WSAEMSGSIZE;
        case EPROTOTYPE:        return WSAEPROTOTYPE;
        case ENOPROTOOPT:       return WSAENOPROTOOPT;
        case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
        case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
        case EOPNOTSUPP:        return WSAEOPNOTSUPP;
        case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
        case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
        case EADDRINUSE:        return WSAEADDRINUSE;
        case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
        case ENETDOWN:          return WSAENETDOWN;
        case ENETUNREACH:       return WSAENETUNREACH;
        case ENETRESET:         return WSAENETRESET;
        case ECONNABORTED:      return WSAECONNABORTED;
        case EPIPE:
        case ECONNRESET:        return WSAECONNRESET;
        case ENOBUFS:           return WSAENOBUFS;
        case EISCONN:           return WSAEISCONN;
        case ENOTCONN:          return WSAENOTCONN;
        case ESHUTDOWN:         return WSAESHUTDOWN;
        case ETOOMANYREFS:      return WSAETOOMANYREFS;
        case ETIMEDOUT:         return WSAETIMEDOUT;
        case ECONNREFUSED:      return WSAECONNREFUSED;
        case ELOOP:             return WSAELOOP;
        case ENAMETOOLONG:      return WSAENAMETOOLONG;
        case EHOSTDOWN:         return WSAEHOSTDOWN;
        case EHOSTUNREACH:      return WSAEHOSTUNREACH;
        case ENOTEMPTY:         return WSAENOTEMPTY;
#ifdef EPROCLIM
        case EPROCLIM:          return WSAEPROCLIM;
#endif
#ifdef EUSERS
        case EUSERS:            return WSAEUSERS;
#endif
#ifdef EDQUOT
        case EDQUOT:            return WSAEDQUOT;
#endif
#ifdef ESTALE
        case ESTALE:            return WSAESTALE;
#endif
#ifdef EREMOTE
        case EREMOTE:           return WSAEREMOTE;
#endif
    default: errno = err; perror( "sock_set_error" ); return WSAEFAULT;
    }
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#endif
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    return err;
}

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static int sock_send(int fd, const void *msg, size_t len, int flags)
{
    int ret;
    do
    {
        ret = send(fd, msg, len, flags);
    }
    while(ret == -1 && errno == EINTR);
    return ret;
}

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static int sock_recv(int fd, void *msg, size_t len, int flags)
{
    int ret;
    do
    {
        ret = recv(fd, msg, len, flags);
    }
    while(ret == -1 && errno == EINTR);
    return ret;
}

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static DWORD netconn_verify_cert( PCCERT_CONTEXT cert, WCHAR *server, DWORD security_flags )
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{
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    HCERTSTORE store = cert->hCertStore;
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    BOOL ret;
    CERT_CHAIN_PARA chainPara = { sizeof(chainPara), { 0 } };
    PCCERT_CHAIN_CONTEXT chain;
    char oid_server_auth[] = szOID_PKIX_KP_SERVER_AUTH;
    char *server_auth[] = { oid_server_auth };
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    DWORD err = ERROR_SUCCESS;
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    TRACE("verifying %s\n", debugstr_w( server ));
    chainPara.RequestedUsage.Usage.cUsageIdentifier = 1;
    chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = server_auth;
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    if ((ret = CertGetCertificateChain( NULL, cert, NULL, store, &chainPara,
                                        CERT_CHAIN_REVOCATION_CHECK_CHAIN_EXCLUDE_ROOT,
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                                        NULL, &chain )))
    {
        if (chain->TrustStatus.dwErrorStatus)
        {
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            static const DWORD supportedErrors =
                CERT_TRUST_IS_NOT_TIME_VALID |
                CERT_TRUST_IS_UNTRUSTED_ROOT |
                CERT_TRUST_IS_NOT_VALID_FOR_USAGE;

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            if (chain->TrustStatus.dwErrorStatus & CERT_TRUST_IS_NOT_TIME_VALID)
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            {
                if (!(security_flags & SECURITY_FLAG_IGNORE_CERT_DATE_INVALID))
                    err = ERROR_WINHTTP_SECURE_CERT_DATE_INVALID;
            }
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            else if (chain->TrustStatus.dwErrorStatus &
                     CERT_TRUST_IS_UNTRUSTED_ROOT)
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            {
                if (!(security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA))
                    err = ERROR_WINHTTP_SECURE_INVALID_CA;
            }
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            else if ((chain->TrustStatus.dwErrorStatus &
                      CERT_TRUST_IS_OFFLINE_REVOCATION) ||
                     (chain->TrustStatus.dwErrorStatus &
                      CERT_TRUST_REVOCATION_STATUS_UNKNOWN))
                err = ERROR_WINHTTP_SECURE_CERT_REV_FAILED;
            else if (chain->TrustStatus.dwErrorStatus & CERT_TRUST_IS_REVOKED)
                err = ERROR_WINHTTP_SECURE_CERT_REVOKED;
            else if (chain->TrustStatus.dwErrorStatus &
                CERT_TRUST_IS_NOT_VALID_FOR_USAGE)
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            {
                if (!(security_flags & SECURITY_FLAG_IGNORE_CERT_WRONG_USAGE))
                    err = ERROR_WINHTTP_SECURE_CERT_WRONG_USAGE;
            }
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            else if (chain->TrustStatus.dwErrorStatus & ~supportedErrors)
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                err = ERROR_WINHTTP_SECURE_INVALID_CERT;
        }
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        if (!err)
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        {
            CERT_CHAIN_POLICY_PARA policyPara;
            SSL_EXTRA_CERT_CHAIN_POLICY_PARA sslExtraPolicyPara;
            CERT_CHAIN_POLICY_STATUS policyStatus;
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            CERT_CHAIN_CONTEXT chainCopy;
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            /* Clear chain->TrustStatus.dwErrorStatus so
             * CertVerifyCertificateChainPolicy will verify additional checks
             * rather than stopping with an existing, ignored error.
             */
            memcpy(&chainCopy, chain, sizeof(chainCopy));
            chainCopy.TrustStatus.dwErrorStatus = 0;
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            sslExtraPolicyPara.u.cbSize = sizeof(sslExtraPolicyPara);
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            sslExtraPolicyPara.dwAuthType = AUTHTYPE_SERVER;
            sslExtraPolicyPara.pwszServerName = server;
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            sslExtraPolicyPara.fdwChecks = security_flags;
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            policyPara.cbSize = sizeof(policyPara);
            policyPara.dwFlags = 0;
            policyPara.pvExtraPolicyPara = &sslExtraPolicyPara;
            ret = CertVerifyCertificateChainPolicy( CERT_CHAIN_POLICY_SSL,
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                                                    &chainCopy, &policyPara,
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                                                    &policyStatus );
            /* Any error in the policy status indicates that the
             * policy couldn't be verified.
             */
            if (ret && policyStatus.dwError)
            {
                if (policyStatus.dwError == CERT_E_CN_NO_MATCH)
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                    err = ERROR_WINHTTP_SECURE_CERT_CN_INVALID;
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                else
                    err = ERROR_WINHTTP_SECURE_INVALID_CERT;
            }
        }
        CertFreeCertificateChain( chain );
    }
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    else
        err = ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
    TRACE("returning %08x\n", err);
    return err;
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}

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static SecHandle cred_handle;
static BOOL cred_handle_initialized;

static CRITICAL_SECTION init_sechandle_cs;
static CRITICAL_SECTION_DEBUG init_sechandle_cs_debug = {
    0, 0, &init_sechandle_cs,
    { &init_sechandle_cs_debug.ProcessLocksList,
      &init_sechandle_cs_debug.ProcessLocksList },
    0, 0, { (DWORD_PTR)(__FILE__ ": init_sechandle_cs") }
};
static CRITICAL_SECTION init_sechandle_cs = { &init_sechandle_cs_debug, -1, 0, 0, 0, 0 };

static BOOL ensure_cred_handle(void)
{
    BOOL ret = TRUE;

    EnterCriticalSection(&init_sechandle_cs);

    if(!cred_handle_initialized) {
        SECURITY_STATUS res;

        res = AcquireCredentialsHandleW(NULL, (WCHAR*)UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL, NULL,
                NULL, NULL, &cred_handle, NULL);
        if(res == SEC_E_OK) {
            cred_handle_initialized = TRUE;
        }else {
            WARN("AcquireCredentialsHandleW failed: %u\n", res);
            ret = FALSE;
        }
    }

    LeaveCriticalSection(&init_sechandle_cs);
    return ret;
}

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BOOL netconn_init( netconn_t *conn )
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{
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    memset(conn, 0, sizeof(*conn));
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    conn->socket = -1;
    return TRUE;
}

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void netconn_unload( void )
{
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    if(cred_handle_initialized)
        FreeCredentialsHandle(&cred_handle);
    DeleteCriticalSection(&init_sechandle_cs);
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#ifndef HAVE_GETADDRINFO
    DeleteCriticalSection(&cs_gethostbyname);
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#endif
}

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BOOL netconn_connected( netconn_t *conn )
{
    return (conn->socket != -1);
}

BOOL netconn_create( netconn_t *conn, int domain, int type, int protocol )
{
    if ((conn->socket = socket( domain, type, protocol )) == -1)
    {
        WARN("unable to create socket (%s)\n", strerror(errno));
        set_last_error( sock_get_error( errno ) );
        return FALSE;
    }
    return TRUE;
}

BOOL netconn_close( netconn_t *conn )
{
    int res;

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    if (conn->secure)
    {
        heap_free( conn->peek_msg_mem );
        conn->peek_msg_mem = NULL;
        conn->peek_msg = NULL;
        conn->peek_len = 0;
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        heap_free(conn->ssl_buf);
        conn->ssl_buf = NULL;
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        heap_free(conn->extra_buf);
        conn->extra_buf = NULL;
        conn->extra_len = 0;
        DeleteSecurityContext(&conn->ssl_ctx);
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        conn->secure = FALSE;
    }
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    res = closesocket( conn->socket );
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    conn->socket = -1;
    if (res == -1)
    {
        set_last_error( sock_get_error( errno ) );
        return FALSE;
    }
    return TRUE;
}

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BOOL netconn_connect( netconn_t *conn, const struct sockaddr *sockaddr, unsigned int addr_len, int timeout )
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{
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    BOOL ret = FALSE;
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    int res;
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    ULONG state;
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    if (timeout > 0)
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    {
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        state = 1;
        ioctlsocket( conn->socket, FIONBIO, &state );
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    }
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    for (;;)
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    {
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        res = 0;
        if (connect( conn->socket, sockaddr, addr_len ) < 0)
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        {
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            res = sock_get_error( errno );
            if (res == WSAEWOULDBLOCK || res == WSAEINPROGRESS)
            {
                struct pollfd pfd;

                pfd.fd = conn->socket;
                pfd.events = POLLOUT;
                for (;;)
                {
                    res = 0;
                    if (poll( &pfd, 1, timeout ) > 0)
                    {
                        ret = TRUE;
                        break;
                    }
                    else
                    {
                        res = sock_get_error( errno );
                        if (res != WSAEINTR) break;
                    }
                }
            }
            if (res != WSAEINTR) break;
        }
        else
        {
            ret = TRUE;
            break;
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        }
    }
    if (timeout > 0)
    {
        state = 0;
        ioctlsocket( conn->socket, FIONBIO, &state );
    }
    if (!ret)
    {
        WARN("unable to connect to host (%d)\n", res);
        set_last_error( res );
    }
    return ret;
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}

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BOOL netconn_secure_connect( netconn_t *conn, WCHAR *hostname )
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{
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    SecBuffer out_buf = {0, SECBUFFER_TOKEN, NULL}, in_bufs[2] = {{0, SECBUFFER_TOKEN}, {0, SECBUFFER_EMPTY}};
    SecBufferDesc out_desc = {SECBUFFER_VERSION, 1, &out_buf}, in_desc = {SECBUFFER_VERSION, 2, in_bufs};
    BYTE *read_buf;
    SIZE_T read_buf_size = 2048;
    ULONG attrs = 0;
    CtxtHandle ctx;
    SSIZE_T size;
    const CERT_CONTEXT *cert;
    SECURITY_STATUS status;
    DWORD res = ERROR_SUCCESS;

    const DWORD isc_req_flags = ISC_REQ_ALLOCATE_MEMORY|ISC_REQ_USE_SESSION_KEY|ISC_REQ_CONFIDENTIALITY
        |ISC_REQ_SEQUENCE_DETECT|ISC_REQ_REPLAY_DETECT|ISC_REQ_MANUAL_CRED_VALIDATION;

    if(!ensure_cred_handle())
        return FALSE;

    read_buf = heap_alloc(read_buf_size);
    if(!read_buf)
        return FALSE;

    status = InitializeSecurityContextW(&cred_handle, NULL, hostname, isc_req_flags, 0, 0, NULL, 0,
            &ctx, &out_desc, &attrs, NULL);

    assert(status != SEC_E_OK);

    while(status == SEC_I_CONTINUE_NEEDED || status == SEC_E_INCOMPLETE_MESSAGE) {
        if(out_buf.cbBuffer) {
            assert(status == SEC_I_CONTINUE_NEEDED);

            TRACE("sending %u bytes\n", out_buf.cbBuffer);

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            size = sock_send(conn->socket, out_buf.pvBuffer, out_buf.cbBuffer, 0);
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            if(size != out_buf.cbBuffer) {
                ERR("send failed\n");
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                res = ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
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                break;
            }

            FreeContextBuffer(out_buf.pvBuffer);
            out_buf.pvBuffer = NULL;
            out_buf.cbBuffer = 0;
        }

        if(status == SEC_I_CONTINUE_NEEDED) {
            assert(in_bufs[1].cbBuffer < read_buf_size);

            memmove(read_buf, (BYTE*)in_bufs[0].pvBuffer+in_bufs[0].cbBuffer-in_bufs[1].cbBuffer, in_bufs[1].cbBuffer);
            in_bufs[0].cbBuffer = in_bufs[1].cbBuffer;

            in_bufs[1].BufferType = SECBUFFER_EMPTY;
            in_bufs[1].cbBuffer = 0;
            in_bufs[1].pvBuffer = NULL;
        }

        assert(in_bufs[0].BufferType == SECBUFFER_TOKEN);
        assert(in_bufs[1].BufferType == SECBUFFER_EMPTY);

        if(in_bufs[0].cbBuffer + 1024 > read_buf_size) {
            BYTE *new_read_buf;

            new_read_buf = heap_realloc(read_buf, read_buf_size + 1024);
            if(!new_read_buf) {
                status = E_OUTOFMEMORY;
                break;
            }

            in_bufs[0].pvBuffer = read_buf = new_read_buf;
            read_buf_size += 1024;
        }

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        size = sock_recv(conn->socket, read_buf+in_bufs[0].cbBuffer, read_buf_size-in_bufs[0].cbBuffer, 0);
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        if(size < 1) {
            WARN("recv error\n");
            status = ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
            break;
        }

        TRACE("recv %lu bytes\n", size);

        in_bufs[0].cbBuffer += size;
        in_bufs[0].pvBuffer = read_buf;
        status = InitializeSecurityContextW(&cred_handle, &ctx, hostname,  isc_req_flags, 0, 0, &in_desc,
                0, NULL, &out_desc, &attrs, NULL);
        TRACE("InitializeSecurityContext ret %08x\n", status);

        if(status == SEC_E_OK) {
            if(in_bufs[1].BufferType == SECBUFFER_EXTRA)
                FIXME("SECBUFFER_EXTRA not supported\n");

            status = QueryContextAttributesW(&ctx, SECPKG_ATTR_STREAM_SIZES, &conn->ssl_sizes);
            if(status != SEC_E_OK) {
                WARN("Could not get sizes\n");
                break;
            }

            status = QueryContextAttributesW(&ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&cert);
            if(status == SEC_E_OK) {
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                res = netconn_verify_cert(cert, hostname, conn->security_flags);
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                CertFreeCertificateContext(cert);
                if(res != ERROR_SUCCESS) {
                    WARN("cert verify failed: %u\n", res);
                    break;
                }
            }else {
                WARN("Could not get cert\n");
                break;
            }
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            conn->ssl_buf = heap_alloc(conn->ssl_sizes.cbHeader + conn->ssl_sizes.cbMaximumMessage + conn->ssl_sizes.cbTrailer);
            if(!conn->ssl_buf) {
                res = GetLastError();
                break;
            }
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        }
    }

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    heap_free(read_buf);
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    if(status != SEC_E_OK || res != ERROR_SUCCESS) {
        WARN("Failed to initialize security context failed: %08x\n", status);
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        heap_free(conn->ssl_buf);
        conn->ssl_buf = NULL;
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        DeleteSecurityContext(&ctx);
        set_last_error(res ? res : ERROR_WINHTTP_SECURE_CHANNEL_ERROR);
        return FALSE;
    }


    TRACE("established SSL connection\n");
    conn->secure = TRUE;
    conn->ssl_ctx = ctx;
    return TRUE;
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}

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static BOOL send_ssl_chunk(netconn_t *conn, const void *msg, size_t size)
{
    SecBuffer bufs[4] = {
        {conn->ssl_sizes.cbHeader, SECBUFFER_STREAM_HEADER, conn->ssl_buf},
        {size,  SECBUFFER_DATA, conn->ssl_buf+conn->ssl_sizes.cbHeader},
        {conn->ssl_sizes.cbTrailer, SECBUFFER_STREAM_TRAILER, conn->ssl_buf+conn->ssl_sizes.cbHeader+size},
        {0, SECBUFFER_EMPTY, NULL}
    };
    SecBufferDesc buf_desc = {SECBUFFER_VERSION, sizeof(bufs)/sizeof(*bufs), bufs};
    SECURITY_STATUS res;

    memcpy(bufs[1].pvBuffer, msg, size);
    res = EncryptMessage(&conn->ssl_ctx, 0, &buf_desc, 0);
    if(res != SEC_E_OK) {
        WARN("EncryptMessage failed\n");
        return FALSE;
    }

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    if(sock_send(conn->socket, conn->ssl_buf, bufs[0].cbBuffer+bufs[1].cbBuffer+bufs[2].cbBuffer, 0) < 1) {
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        WARN("send failed\n");
        return FALSE;
    }

    return TRUE;
}

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BOOL netconn_send( netconn_t *conn, const void *msg, size_t len, int *sent )
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{
    if (!netconn_connected( conn )) return FALSE;
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    if (conn->secure)
    {
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        const BYTE *ptr = msg;
        size_t chunk_size;

        *sent = 0;

        while(len) {
            chunk_size = min(len, conn->ssl_sizes.cbMaximumMessage);
            if(!send_ssl_chunk(conn, ptr, chunk_size))
                return FALSE;

            *sent += chunk_size;
            ptr += chunk_size;
            len -= chunk_size;
        }

        return TRUE;
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    }
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    if ((*sent = sock_send( conn->socket, msg, len, 0 )) == -1)
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    {
        set_last_error( sock_get_error( errno ) );
        return FALSE;
    }
    return TRUE;
}

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static BOOL read_ssl_chunk(netconn_t *conn, void *buf, SIZE_T buf_size, SIZE_T *ret_size, BOOL *eof)
{
    const SIZE_T ssl_buf_size = conn->ssl_sizes.cbHeader+conn->ssl_sizes.cbMaximumMessage+conn->ssl_sizes.cbTrailer;
    SecBuffer bufs[4];
    SecBufferDesc buf_desc = {SECBUFFER_VERSION, sizeof(bufs)/sizeof(*bufs), bufs};
    SSIZE_T size, buf_len;
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    unsigned int i;
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    SECURITY_STATUS res;

    assert(conn->extra_len < ssl_buf_size);

    if(conn->extra_len) {
        memcpy(conn->ssl_buf, conn->extra_buf, conn->extra_len);
        buf_len = conn->extra_len;
        conn->extra_len = 0;
        heap_free(conn->extra_buf);
        conn->extra_buf = NULL;
    }else {
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        buf_len = sock_recv(conn->socket, conn->ssl_buf+conn->extra_len, ssl_buf_size-conn->extra_len, 0);
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        if(buf_len < 0) {
            WARN("recv failed\n");
            return FALSE;
        }

        if(!buf_len) {
            *eof = TRUE;
            return TRUE;
        }
    }

    *ret_size = 0;
    *eof = FALSE;

    do {
        memset(bufs, 0, sizeof(bufs));
        bufs[0].BufferType = SECBUFFER_DATA;
        bufs[0].cbBuffer = buf_len;
        bufs[0].pvBuffer = conn->ssl_buf;

        res = DecryptMessage(&conn->ssl_ctx, &buf_desc, 0, NULL);
        switch(res) {
        case SEC_E_OK:
            break;
        case SEC_I_CONTEXT_EXPIRED:
            TRACE("context expired\n");
            *eof = TRUE;
            return TRUE;
        case SEC_E_INCOMPLETE_MESSAGE:
            assert(buf_len < ssl_buf_size);

656
            size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698
            if(size < 1)
                return FALSE;

            buf_len += size;
            continue;
        default:
            WARN("failed: %08x\n", res);
            return FALSE;
        }
    } while(res != SEC_E_OK);

    for(i=0; i < sizeof(bufs)/sizeof(*bufs); i++) {
        if(bufs[i].BufferType == SECBUFFER_DATA) {
            size = min(buf_size, bufs[i].cbBuffer);
            memcpy(buf, bufs[i].pvBuffer, size);
            if(size < bufs[i].cbBuffer) {
                assert(!conn->peek_len);
                conn->peek_msg_mem = conn->peek_msg = heap_alloc(bufs[i].cbBuffer - size);
                if(!conn->peek_msg)
                    return FALSE;
                conn->peek_len = bufs[i].cbBuffer-size;
                memcpy(conn->peek_msg, (char*)bufs[i].pvBuffer+size, conn->peek_len);
            }

            *ret_size = size;
        }
    }

    for(i=0; i < sizeof(bufs)/sizeof(*bufs); i++) {
        if(bufs[i].BufferType == SECBUFFER_EXTRA) {
            conn->extra_buf = heap_alloc(bufs[i].cbBuffer);
            if(!conn->extra_buf)
                return FALSE;

            conn->extra_len = bufs[i].cbBuffer;
            memcpy(conn->extra_buf, bufs[i].pvBuffer, conn->extra_len);
        }
    }

    return TRUE;
}

699 700 701 702 703
BOOL netconn_recv( netconn_t *conn, void *buf, size_t len, int flags, int *recvd )
{
    *recvd = 0;
    if (!netconn_connected( conn )) return FALSE;
    if (!len) return TRUE;
704 705 706

    if (conn->secure)
    {
707 708
        SIZE_T size, cread;
        BOOL res, eof;
709

710
        if (conn->peek_msg)
711 712 713 714 715 716 717 718 719 720 721 722 723
        {
            *recvd = min( len, conn->peek_len );
            memcpy( buf, conn->peek_msg, *recvd );
            conn->peek_len -= *recvd;
            conn->peek_msg += *recvd;

            if (conn->peek_len == 0)
            {
                heap_free( conn->peek_msg_mem );
                conn->peek_msg_mem = NULL;
                conn->peek_msg = NULL;
            }
            /* check if we have enough data from the peek buffer */
724
            if (!(flags & MSG_WAITALL) || *recvd == len) return TRUE;
725
        }
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
        size = *recvd;

        do {
            res = read_ssl_chunk(conn, (BYTE*)buf+size, len-size, &cread, &eof);
            if(!res) {
                WARN("read_ssl_chunk failed\n");
                if(!size)
                    return FALSE;
                break;
            }

            if(eof) {
                TRACE("EOF\n");
                break;
            }

            size += cread;
        }while(!size || ((flags & MSG_WAITALL) && size < len));

        TRACE("received %ld bytes\n", size);
        *recvd = size;
        return TRUE;
748
    }
749
    if ((*recvd = sock_recv( conn->socket, buf, len, flags )) == -1)
750 751 752 753 754 755 756
    {
        set_last_error( sock_get_error( errno ) );
        return FALSE;
    }
    return TRUE;
}

757
ULONG netconn_query_data_available( netconn_t *conn )
758
{
759 760
    if(!netconn_connected(conn))
        return 0;
761

762
    if(conn->secure)
763 764 765
        return conn->peek_len;

    return 0;
766 767 768 769 770 771 772 773 774 775
}

DWORD netconn_set_timeout( netconn_t *netconn, BOOL send, int value )
{
    struct timeval tv;

    /* value is in milliseconds, convert to struct timeval */
    tv.tv_sec = value / 1000;
    tv.tv_usec = (value % 1000) * 1000;

776
    if (setsockopt( netconn->socket, SOL_SOCKET, send ? SO_SNDTIMEO : SO_RCVTIMEO, (void*)&tv, sizeof(tv) ) == -1)
777 778 779 780 781 782 783
    {
        WARN("setsockopt failed (%s)\n", strerror( errno ));
        return sock_get_error( errno );
    }
    return ERROR_SUCCESS;
}

784
static DWORD resolve_hostname( const WCHAR *hostnameW, INTERNET_PORT port, struct sockaddr *sa, socklen_t *sa_len )
785 786 787 788 789 790 791
{
    char *hostname;
#ifdef HAVE_GETADDRINFO
    struct addrinfo *res, hints;
    int ret;
#else
    struct hostent *he;
792
    struct sockaddr_in *sin = (struct sockaddr_in *)sa;
793 794
#endif

795
    if (!(hostname = strdupWA( hostnameW ))) return ERROR_OUTOFMEMORY;
796 797 798

#ifdef HAVE_GETADDRINFO
    memset( &hints, 0, sizeof(struct addrinfo) );
799 800 801
    /* Prefer IPv4 to IPv6 addresses, since some web servers do not listen on
     * their IPv6 addresses even though they have IPv6 addresses in the DNS.
     */
802 803 804 805 806
    hints.ai_family = AF_INET;

    ret = getaddrinfo( hostname, NULL, &hints, &res );
    if (ret != 0)
    {
807 808 809 810 811 812 813
        TRACE("failed to get IPv4 address of %s (%s), retrying with IPv6\n", debugstr_w(hostnameW), gai_strerror(ret));
        hints.ai_family = AF_INET6;
        ret = getaddrinfo( hostname, NULL, &hints, &res );
        if (ret != 0)
        {
            TRACE("failed to get address of %s (%s)\n", debugstr_w(hostnameW), gai_strerror(ret));
            heap_free( hostname );
814
            return ERROR_WINHTTP_NAME_NOT_RESOLVED;
815
        }
816
    }
817
    heap_free( hostname );
818
    if (*sa_len < res->ai_addrlen)
819 820 821
    {
        WARN("address too small\n");
        freeaddrinfo( res );
822
        return ERROR_WINHTTP_NAME_NOT_RESOLVED;
823
    }
824 825 826 827 828 829 830 831
    *sa_len = res->ai_addrlen;
    memcpy( sa, res->ai_addr, res->ai_addrlen );
    /* Copy port */
    switch (res->ai_family)
    {
    case AF_INET:
        ((struct sockaddr_in *)sa)->sin_port = htons( port );
        break;
832 833 834
    case AF_INET6:
        ((struct sockaddr_in6 *)sa)->sin6_port = htons( port );
        break;
835
    }
836 837

    freeaddrinfo( res );
838
    return ERROR_SUCCESS;
839 840 841 842 843 844 845
#else
    EnterCriticalSection( &cs_gethostbyname );

    he = gethostbyname( hostname );
    heap_free( hostname );
    if (!he)
    {
846
        TRACE("failed to get address of %s (%d)\n", debugstr_w(hostnameW), h_errno);
847
        LeaveCriticalSection( &cs_gethostbyname );
848
        return ERROR_WINHTTP_NAME_NOT_RESOLVED;
849
    }
850 851 852 853
    if (*sa_len < sizeof(struct sockaddr_in))
    {
        WARN("address too small\n");
        LeaveCriticalSection( &cs_gethostbyname );
854
        return ERROR_WINHTTP_NAME_NOT_RESOLVED;
855 856
    }
    *sa_len = sizeof(struct sockaddr_in);
857
    memset( sa, 0, sizeof(struct sockaddr_in) );
858 859 860
    memcpy( &sin->sin_addr, he->h_addr, he->h_length );
    sin->sin_family = he->h_addrtype;
    sin->sin_port = htons( port );
861 862

    LeaveCriticalSection( &cs_gethostbyname );
863
    return ERROR_SUCCESS;
864
#endif
865
}
866

867 868
struct resolve_args
{
869
    const WCHAR     *hostname;
870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913
    INTERNET_PORT    port;
    struct sockaddr *sa;
    socklen_t       *sa_len;
};

static DWORD CALLBACK resolve_proc( LPVOID arg )
{
    struct resolve_args *ra = arg;
    return resolve_hostname( ra->hostname, ra->port, ra->sa, ra->sa_len );
}

BOOL netconn_resolve( WCHAR *hostname, INTERNET_PORT port, struct sockaddr *sa, socklen_t *sa_len, int timeout )
{
    DWORD ret;

    if (timeout)
    {
        DWORD status;
        HANDLE thread;
        struct resolve_args ra;

        ra.hostname = hostname;
        ra.port     = port;
        ra.sa       = sa;
        ra.sa_len   = sa_len;

        thread = CreateThread( NULL, 0, resolve_proc, &ra, 0, NULL );
        if (!thread) return FALSE;

        status = WaitForSingleObject( thread, timeout );
        if (status == WAIT_OBJECT_0) GetExitCodeThread( thread, &ret );
        else ret = ERROR_WINHTTP_TIMEOUT;
        CloseHandle( thread );
    }
    else ret = resolve_hostname( hostname, port, sa, sa_len );

    if (ret)
    {
        set_last_error( ret );
        return FALSE;
    }
    return TRUE;
}

914 915
const void *netconn_get_certificate( netconn_t *conn )
{
916 917 918 919 920 921
    const CERT_CONTEXT *ret;
    SECURITY_STATUS res;

    if (!conn->secure) return NULL;
    res = QueryContextAttributesW(&conn->ssl_ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&ret);
    return res == SEC_E_OK ? ret : NULL;
922
}
923 924 925

int netconn_get_cipher_strength( netconn_t *conn )
{
926 927 928 929 930 931 932 933
    SecPkgContext_ConnectionInfo conn_info;
    SECURITY_STATUS res;

    if (!conn->secure) return 0;
    res = QueryContextAttributesW(&conn->ssl_ctx, SECPKG_ATTR_CONNECTION_INFO, (void*)&conn_info);
    if(res != SEC_E_OK)
        WARN("QueryContextAttributesW failed: %08x\n", res);
    return res == SEC_E_OK ? conn_info.dwCipherStrength : 0;
934
}