#include "curl_setup.h"
#if defined(USE_WINDOWS_SSPI) && defined(USE_NTLM)
#include <curl/curl.h>
#include "vauth/vauth.h"
#include "urldata.h"
#include "curl_base64.h"
#include "curl_ntlm_core.h"
#include "warnless.h"
#include "curl_multibyte.h"
#include "sendf.h"
#include "curl_memory.h"
#include "memdebug.h"
bool Curl_auth_is_ntlm_supported(void)
{
PSecPkgInfo SecurityPackage;
SECURITY_STATUS status;
status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT(SP_NAME_NTLM),
&SecurityPackage);
return (status == SEC_E_OK ? TRUE : FALSE);
}
CURLcode Curl_auth_create_ntlm_type1_message(struct Curl_easy *data,
const char *userp,
const char *passwdp,
const char *service,
const char *host,
struct ntlmdata *ntlm,
char **outptr, size_t *outlen)
{
PSecPkgInfo SecurityPackage;
SecBuffer type_1_buf;
SecBufferDesc type_1_desc;
SECURITY_STATUS status;
unsigned long attrs;
TimeStamp expiry;
Curl_auth_ntlm_cleanup(ntlm);
status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT(SP_NAME_NTLM),
&SecurityPackage);
if(status != SEC_E_OK)
return CURLE_NOT_BUILT_IN;
ntlm->token_max = SecurityPackage->cbMaxToken;
s_pSecFn->FreeContextBuffer(SecurityPackage);
ntlm->output_token = malloc(ntlm->token_max);
if(!ntlm->output_token)
return CURLE_OUT_OF_MEMORY;
if(userp && *userp) {
CURLcode result;
result = Curl_create_sspi_identity(userp, passwdp, &ntlm->identity);
if(result)
return result;
ntlm->p_identity = &ntlm->identity;
}
else
ntlm->p_identity = NULL;
ntlm->credentials = calloc(1, sizeof(CredHandle));
if(!ntlm->credentials)
return CURLE_OUT_OF_MEMORY;
status = s_pSecFn->AcquireCredentialsHandle(NULL,
(TCHAR *) TEXT(SP_NAME_NTLM),
SECPKG_CRED_OUTBOUND, NULL,
ntlm->p_identity, NULL, NULL,
ntlm->credentials, &expiry);
if(status != SEC_E_OK)
return CURLE_LOGIN_DENIED;
ntlm->context = calloc(1, sizeof(CtxtHandle));
if(!ntlm->context)
return CURLE_OUT_OF_MEMORY;
ntlm->spn = Curl_auth_build_spn(service, host, NULL);
if(!ntlm->spn)
return CURLE_OUT_OF_MEMORY;
type_1_desc.ulVersion = SECBUFFER_VERSION;
type_1_desc.cBuffers = 1;
type_1_desc.pBuffers = &type_1_buf;
type_1_buf.BufferType = SECBUFFER_TOKEN;
type_1_buf.pvBuffer = ntlm->output_token;
type_1_buf.cbBuffer = curlx_uztoul(ntlm->token_max);
status = s_pSecFn->InitializeSecurityContext(ntlm->credentials, NULL,
ntlm->spn,
0, 0, SECURITY_NETWORK_DREP,
NULL, 0,
ntlm->context, &type_1_desc,
&attrs, &expiry);
if(status == SEC_I_COMPLETE_NEEDED ||
status == SEC_I_COMPLETE_AND_CONTINUE)
s_pSecFn->CompleteAuthToken(ntlm->context, &type_1_desc);
else if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED)
return CURLE_RECV_ERROR;
return Curl_base64_encode(data, (char *) ntlm->output_token,
type_1_buf.cbBuffer, outptr, outlen);
}
CURLcode Curl_auth_decode_ntlm_type2_message(struct Curl_easy *data,
const char *type2msg,
struct ntlmdata *ntlm)
{
CURLcode result = CURLE_OK;
unsigned char *type2 = NULL;
size_t type2_len = 0;
#if defined(CURL_DISABLE_VERBOSE_STRINGS)
(void) data;
#endif
if(strlen(type2msg) && *type2msg != '=') {
result = Curl_base64_decode(type2msg, &type2, &type2_len);
if(result)
return result;
}
if(!type2) {
infof(data, "NTLM handshake failure (empty type-2 message)\n");
return CURLE_BAD_CONTENT_ENCODING;
}
ntlm->input_token = type2;
ntlm->input_token_len = type2_len;
return result;
}
CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
const char *userp,
const char *passwdp,
struct ntlmdata *ntlm,
char **outptr, size_t *outlen)
{
CURLcode result = CURLE_OK;
SecBuffer type_2_bufs[2];
SecBuffer type_3_buf;
SecBufferDesc type_2_desc;
SecBufferDesc type_3_desc;
SECURITY_STATUS status;
unsigned long attrs;
TimeStamp expiry;
(void) passwdp;
(void) userp;
type_2_desc.ulVersion = SECBUFFER_VERSION;
type_2_desc.cBuffers = 1;
type_2_desc.pBuffers = &type_2_bufs[0];
type_2_bufs[0].BufferType = SECBUFFER_TOKEN;
type_2_bufs[0].pvBuffer = ntlm->input_token;
type_2_bufs[0].cbBuffer = curlx_uztoul(ntlm->input_token_len);
#ifdef SECPKG_ATTR_ENDPOINT_BINDINGS
if(ntlm->sslContext) {
SEC_CHANNEL_BINDINGS channelBindings;
SecPkgContext_Bindings pkgBindings;
pkgBindings.Bindings = &channelBindings;
status = s_pSecFn->QueryContextAttributes(
ntlm->sslContext,
SECPKG_ATTR_ENDPOINT_BINDINGS,
&pkgBindings
);
if(status == SEC_E_OK) {
type_2_desc.cBuffers++;
type_2_bufs[1].BufferType = SECBUFFER_CHANNEL_BINDINGS;
type_2_bufs[1].cbBuffer = pkgBindings.BindingsLength;
type_2_bufs[1].pvBuffer = pkgBindings.Bindings;
}
}
#endif
type_3_desc.ulVersion = SECBUFFER_VERSION;
type_3_desc.cBuffers = 1;
type_3_desc.pBuffers = &type_3_buf;
type_3_buf.BufferType = SECBUFFER_TOKEN;
type_3_buf.pvBuffer = ntlm->output_token;
type_3_buf.cbBuffer = curlx_uztoul(ntlm->token_max);
status = s_pSecFn->InitializeSecurityContext(ntlm->credentials,
ntlm->context,
ntlm->spn,
0, 0, SECURITY_NETWORK_DREP,
&type_2_desc,
0, ntlm->context,
&type_3_desc,
&attrs, &expiry);
if(status != SEC_E_OK) {
infof(data, "NTLM handshake failure (type-3 message): Status=%x\n",
status);
return CURLE_RECV_ERROR;
}
result = Curl_base64_encode(data, (char *) ntlm->output_token,
type_3_buf.cbBuffer, outptr, outlen);
Curl_auth_ntlm_cleanup(ntlm);
return result;
}
void Curl_auth_ntlm_cleanup(struct ntlmdata *ntlm)
{
if(ntlm->context) {
s_pSecFn->DeleteSecurityContext(ntlm->context);
free(ntlm->context);
ntlm->context = NULL;
}
if(ntlm->credentials) {
s_pSecFn->FreeCredentialsHandle(ntlm->credentials);
free(ntlm->credentials);
ntlm->credentials = NULL;
}
Curl_sspi_free_identity(ntlm->p_identity);
ntlm->p_identity = NULL;
Curl_safefree(ntlm->input_token);
Curl_safefree(ntlm->output_token);
ntlm->token_max = 0;
Curl_safefree(ntlm->spn);
}
#endif