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Code Issues Releases Wiki Activity

vauth: Moved the Negotiate authentication code to the new vauth directory

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Part 1 of 2 - Moved the SSPI based Negotiate authentication code.
This commit is contained in:
Steve Holme 2016-03-13 16:02:42 +00:00
parent 65f972b2e8
commit ad5e9bfd5d
8 changed files with 350 additions and 190 deletions
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4
lib/Makefile.inc
View File

@ -22,7 +22,9 @@
LIB_VAUTH_CFILES = vauth/vauth.c vauth/cleartext.c vauth/cram.c \
vauth/digest.c vauth/digest_sspi.c vauth/krb5_gssapi.c \
vauth/krb5_sspi.c vauth/ntlm.c vauth/ntlm_sspi.c vauth/oauth2.c
vauth/krb5_sspi.c vauth/ntlm.c vauth/ntlm_sspi.c vauth/oauth2.c \
vauth/spnego_sspi.c
LIB_VAUTH_HFILES = vauth/vauth.h vauth/digest.h vauth/ntlm.h

1
lib/Makefile.vc6
View File

@ -627,6 +627,7 @@ X_OBJS= \
$(DIROBJ)\ntlm.obj \
$(DIROBJ)\ntlm_sspi.obj \
$(DIROBJ)\oauth2.obj \
$(DIROBJ)\spnego_sspi.obj \
$(DIROBJ)\vtls.obj \
$(DIROBJ)\openssl.obj \
$(DIROBJ)\strdup.obj \

1
lib/http.c
View File

@ -54,6 +54,7 @@
#include "curl_base64.h"
#include "cookie.h"
#include "strequal.h"
#include "vauth/vauth.h"
#include "vtls/vtls.h"
#include "http_digest.h"
#include "curl_ntlm.h"

4
lib/http_negotiate.h
View File

@ -33,10 +33,6 @@ CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy);
void Curl_cleanup_negotiate(struct SessionHandle *data);
#ifdef USE_WINDOWS_SSPI
#define GSS_ERROR(status) (status & 0x80000000)
#endif
#endif /* USE_SPNEGO */
#endif /* HEADER_CURL_HTTP_NEGOTIATE_H */

201
lib/http_negotiate_sspi.c
View File

@ -29,11 +29,8 @@
#include "urldata.h"
#include "sendf.h"
#include "rawstr.h"
#include "warnless.h"
#include "curl_base64.h"
#include "vauth/vauth.h"
#include "http_negotiate.h"
#include "curl_multibyte.h"
#include "curl_printf.h"
/* The last #include files should be: */
@ -44,20 +41,13 @@ CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
const char *header)
{
struct SessionHandle *data = conn->data;
BYTE *input_token = NULL;
SecBufferDesc out_buff_desc;
SecBuffer out_sec_buff;
SecBufferDesc in_buff_desc;
SecBuffer in_sec_buff;
SECURITY_STATUS status;
unsigned long attrs;
TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */
size_t len = 0, input_token_len = 0;
CURLcode result;
size_t len;
/* Point to the username and password */
/* Point to the username, password, service and host */
const char *userp;
const char *passwdp;
const char *service;
const char *host;
/* Point to the correct struct with this */
struct negotiatedata *neg_ctx;
@ -65,11 +55,15 @@ CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
if(proxy) {
userp = conn->proxyuser;
passwdp = conn->proxypasswd;
service = data->set.str[STRING_PROXY_SERVICE_NAME];
host = conn->host.name;
neg_ctx = &data->state.proxyneg;
}
else {
userp = conn->user;
passwdp = conn->passwd;
service = data->set.str[STRING_SERVICE_NAME];
host = conn->proxy.name;
neg_ctx = &data->state.negotiate;
}
@ -80,43 +74,6 @@ CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
if(!passwdp)
passwdp = "";
if(neg_ctx->context && neg_ctx->status == SEC_E_OK) {
/* We finished successfully our part of authentication, but server
* rejected it (since we're again here). Exit with an error since we
* can't invent anything better */
Curl_cleanup_negotiate(data);
return CURLE_LOGIN_DENIED;
}
if(!neg_ctx->server_name) {
/* Check proxy auth requested but no given proxy name */
if(proxy && !conn->proxy.name)
return CURLE_BAD_FUNCTION_ARGUMENT;
/* Generate our SPN */
neg_ctx->server_name = Curl_auth_build_spn(
proxy ? data->set.str[STRING_PROXY_SERVICE_NAME] :
data->set.str[STRING_SERVICE_NAME],
proxy ? conn->proxy.name : conn->host.name);
if(!neg_ctx->server_name)
return CURLE_OUT_OF_MEMORY;
}
if(!neg_ctx->output_token) {
PSecPkgInfo SecurityPackage;
status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *)
TEXT(SP_NAME_NEGOTIATE),
&SecurityPackage);
if(status != SEC_E_OK)
return CURLE_NOT_BUILT_IN;
/* Allocate input and output buffers according to the max token size
as indicated by the security package */
neg_ctx->token_max = SecurityPackage->cbMaxToken;
neg_ctx->output_token = malloc(neg_ctx->token_max);
s_pSecFn->FreeContextBuffer(SecurityPackage);
}
/* Obtain the input token, if any */
header += strlen("Negotiate");
while(*header && ISSPACE(*header))
@ -130,124 +87,28 @@ CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
negotiation mechanisms */
return CURLE_LOGIN_DENIED;
}
/* We have to acquire credentials and allocate memory for the context */
neg_ctx->credentials = malloc(sizeof(CredHandle));
neg_ctx->context = malloc(sizeof(CtxtHandle));
if(!neg_ctx->credentials || !neg_ctx->context)
return CURLE_OUT_OF_MEMORY;
if(userp && *userp) {
/* Populate our identity structure */
result = Curl_create_sspi_identity(userp, passwdp, &neg_ctx->identity);
if(result)
return result;
/* Allow proper cleanup of the identity structure */
neg_ctx->p_identity = &neg_ctx->identity;
}
else
/* Use the current Windows user */
neg_ctx->p_identity = NULL;
/* Acquire our credientials handle */
neg_ctx->status =
s_pSecFn->AcquireCredentialsHandle(NULL,
(TCHAR *) TEXT(SP_NAME_NEGOTIATE),
SECPKG_CRED_OUTBOUND, NULL,
neg_ctx->p_identity, NULL, NULL,
neg_ctx->credentials, &expiry);
if(neg_ctx->status != SEC_E_OK)
return CURLE_LOGIN_DENIED;
}
else {
result = Curl_base64_decode(header,
(unsigned char **)&input_token,
&input_token_len);
if(result)
return result;
if(!input_token_len) {
infof(data,
"Negotiate handshake failure (empty challenge message)\n");
return CURLE_BAD_CONTENT_ENCODING;
}
}
/* Setup the "output" security buffer */
out_buff_desc.ulVersion = SECBUFFER_VERSION;
out_buff_desc.cBuffers = 1;
out_buff_desc.pBuffers = &out_sec_buff;
out_sec_buff.BufferType = SECBUFFER_TOKEN;
out_sec_buff.pvBuffer = neg_ctx->output_token;
out_sec_buff.cbBuffer = curlx_uztoul(neg_ctx->token_max);
/* Setup the "input" security buffer if present */
if(input_token) {
in_buff_desc.ulVersion = SECBUFFER_VERSION;
in_buff_desc.cBuffers = 1;
in_buff_desc.pBuffers = &in_sec_buff;
in_sec_buff.BufferType = SECBUFFER_TOKEN;
in_sec_buff.pvBuffer = input_token;
in_sec_buff.cbBuffer = curlx_uztoul(input_token_len);
}
/* Generate our message */
neg_ctx->status = s_pSecFn->InitializeSecurityContext(
neg_ctx->credentials,
input_token ? neg_ctx->context : NULL,
neg_ctx->server_name,
ISC_REQ_CONFIDENTIALITY,
0,
SECURITY_NATIVE_DREP,
input_token ? &in_buff_desc : NULL,
0,
neg_ctx->context,
&out_buff_desc,
&attrs,
&expiry);
free(input_token);
if(GSS_ERROR(neg_ctx->status))
return CURLE_OUT_OF_MEMORY;
if(neg_ctx->status == SEC_I_COMPLETE_NEEDED ||
neg_ctx->status == SEC_I_COMPLETE_AND_CONTINUE) {
neg_ctx->status = s_pSecFn->CompleteAuthToken(neg_ctx->context,
&out_buff_desc);
if(GSS_ERROR(neg_ctx->status))
return CURLE_RECV_ERROR;
}
neg_ctx->output_token_length = out_sec_buff.cbBuffer;
return CURLE_OK;
/* Initilise the security context and decode our challenge */
return Curl_auth_decode_spnego_message(data, userp, passwdp, service, host,
header, neg_ctx);
}
CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
{
struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
&conn->data->state.negotiate;
char *encoded = NULL;
char *base64 = NULL;
size_t len = 0;
char *userp;
CURLcode result;
result = Curl_base64_encode(conn->data,
(const char*)neg_ctx->output_token,
neg_ctx->output_token_length,
&encoded, &len);
result = Curl_auth_create_spnego_message(conn->data, neg_ctx, &base64, &len);
if(result)
return result;
if(!len)
return CURLE_REMOTE_ACCESS_DENIED;
userp = aprintf("%sAuthorization: Negotiate %s\r\n", proxy ? "Proxy-" : "",
encoded);
base64);
if(proxy) {
Curl_safefree(conn->allocptr.proxyuserpwd);
@ -258,43 +119,15 @@ CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
conn->allocptr.userpwd = userp;
}
free(encoded);
free(base64);
return (userp == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
}
static void cleanup(struct negotiatedata *neg_ctx)
{
/* Free our security context */
if(neg_ctx->context) {
s_pSecFn->DeleteSecurityContext(neg_ctx->context);
free(neg_ctx->context);
neg_ctx->context = NULL;
}
/* Free our credentials handle */
if(neg_ctx->credentials) {
s_pSecFn->FreeCredentialsHandle(neg_ctx->credentials);
free(neg_ctx->credentials);
neg_ctx->credentials = NULL;
}
/* Free our identity */
Curl_sspi_free_identity(neg_ctx->p_identity);
neg_ctx->p_identity = NULL;
/* Free the SPN and output token */
Curl_safefree(neg_ctx->server_name);
Curl_safefree(neg_ctx->output_token);
/* Reset any variables */
neg_ctx->token_max = 0;
}
void Curl_cleanup_negotiate(struct SessionHandle *data)
{
cleanup(&data->state.negotiate);
cleanup(&data->state.proxyneg);
Curl_auth_spnego_cleanup(&data->state.negotiate);
Curl_auth_spnego_cleanup(&data->state.proxyneg);
}
#endif /* !CURL_DISABLE_HTTP && USE_SPNEGO */

297
lib/vauth/spnego_sspi.c Normal file
View File

@ -0,0 +1,297 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* RFC4178 Simple and Protected GSS-API Negotiation Mechanism
*
***************************************************************************/
#include "curl_setup.h"
#if defined(USE_WINDOWS_SSPI) && defined(USE_SPNEGO)
#include <curl/curl.h>
#include "vauth/vauth.h"
#include "urldata.h"
#include "curl_base64.h"
#include "warnless.h"
#include "curl_multibyte.h"
#include "sendf.h"
/* The last #include files should be: */
#include "curl_memory.h"
#include "memdebug.h"
/*
* Curl_auth_decode_spnego_message()
*
* This is used to decode an already encoded SPNEGO (Negotiate) challenge
* message.
*
* Parameters:
*
* data [in] - The session handle.
* userp [in] - The user name in the format User or Domain\User.
* passdwp [in] - The user's password.
* service [in] - The service type such as www, smtp, pop or imap.
* hostname [in] - The host name.
* chlg64 [in] - The optional base64 encoded challenge message.
* nego [in/out] - The Negotiate data struct being used and modified.
*
* Returns CURLE_OK on success.
*/
CURLcode Curl_auth_decode_spnego_message(struct SessionHandle *data,
const char *user,
const char *password,
const char *service,
const char *host,
const char *chlg64,
struct negotiatedata *nego)
{
CURLcode result = CURLE_OK;
size_t chlglen = 0;
unsigned char *chlg = NULL;
PSecPkgInfo SecurityPackage;
SecBuffer chlg_buf;
SecBuffer resp_buf;
SecBufferDesc chlg_desc;
SecBufferDesc resp_desc;
unsigned long attrs;
TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */
#if defined(CURL_DISABLE_VERBOSE_STRINGS)
(void) data;
#endif
if(nego->context && nego->status == SEC_E_OK) {
/* We finished successfully our part of authentication, but server
* rejected it (since we're again here). Exit with an error since we
* can't invent anything better */
Curl_auth_spnego_cleanup(nego);
return CURLE_LOGIN_DENIED;
}
/* Generate our SPN */
if(!nego->server_name) {
nego->server_name = Curl_auth_build_spn(service, host);
if(!nego->server_name)
return CURLE_OUT_OF_MEMORY;
}
if(!nego->output_token) {
/* Query the security package for Negotiate */
nego->status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *)
TEXT(SP_NAME_NEGOTIATE),
&SecurityPackage);
if(nego->status != SEC_E_OK)
return CURLE_NOT_BUILT_IN;
nego->token_max = SecurityPackage->cbMaxToken;
/* Release the package buffer as it is not required anymore */
s_pSecFn->FreeContextBuffer(SecurityPackage);
/* Allocate our output buffer */
nego->output_token = malloc(nego->token_max);
if(!nego->output_token)
return CURLE_OUT_OF_MEMORY;
}
if(!nego->credentials) {
if(user && *user) {
/* Populate our identity structure */
result = Curl_create_sspi_identity(user, password, &nego->identity);
if(result)
return result;
/* Allow proper cleanup of the identity structure */
nego->p_identity = &nego->identity;
}
else
/* Use the current Windows user */
nego->p_identity = NULL;
/* Allocate our credentials handle */
nego->credentials = malloc(sizeof(CredHandle));
if(!nego->credentials)
return CURLE_OUT_OF_MEMORY;
memset(nego->credentials, 0, sizeof(CredHandle));
/* Acquire our credentials handle */
nego->status =
s_pSecFn->AcquireCredentialsHandle(NULL,
(TCHAR *)TEXT(SP_NAME_NEGOTIATE),
SECPKG_CRED_OUTBOUND, NULL,
nego->p_identity, NULL, NULL,
nego->credentials, &expiry);
if(nego->status != SEC_E_OK)
return CURLE_LOGIN_DENIED;
/* Allocate our new context handle */
nego->context = malloc(sizeof(CtxtHandle));
if(!nego->context)
return CURLE_OUT_OF_MEMORY;
memset(nego->context, 0, sizeof(CtxtHandle));
}
if(chlg64 && strlen(chlg64)) {
/* Decode the base-64 encoded challenge message */
if(*chlg64 != '=') {
result = Curl_base64_decode(chlg64, &chlg, &chlglen);
if(result)
return result;
}
/* Ensure we have a valid challenge message */
if(!chlg) {
infof(data, "SPNEGO handshake failure (empty challenge message)\n");
return CURLE_BAD_CONTENT_ENCODING;
}
/* Setup the challenge "input" security buffer */
chlg_desc.ulVersion = SECBUFFER_VERSION;
chlg_desc.cBuffers = 1;
chlg_desc.pBuffers = &chlg_buf;
chlg_buf.BufferType = SECBUFFER_TOKEN;
chlg_buf.pvBuffer = chlg;
chlg_buf.cbBuffer = curlx_uztoul(chlglen);
}
/* Setup the response "output" security buffer */
resp_desc.ulVersion = SECBUFFER_VERSION;
resp_desc.cBuffers = 1;
resp_desc.pBuffers = &resp_buf;
resp_buf.BufferType = SECBUFFER_TOKEN;
resp_buf.pvBuffer = nego->output_token;
resp_buf.cbBuffer = curlx_uztoul(nego->token_max);
/* Generate our challenge-response message */
nego->status = s_pSecFn->InitializeSecurityContext(nego->credentials,
chlg ? nego->context :
NULL,
nego->server_name,
ISC_REQ_CONFIDENTIALITY,
0, SECURITY_NATIVE_DREP,
chlg ? &chlg_desc : NULL,
0, nego->context,
&resp_desc, &attrs,
&expiry);
if(GSS_ERROR(nego->status)) {
free(chlg);
return CURLE_OUT_OF_MEMORY;
}
if(nego->status == SEC_I_COMPLETE_NEEDED ||
nego->status == SEC_I_COMPLETE_AND_CONTINUE) {
nego->status = s_pSecFn->CompleteAuthToken(nego->context, &resp_desc);
if(GSS_ERROR(nego->status)) {
free(chlg);
return CURLE_RECV_ERROR;
}
}
nego->output_token_length = resp_buf.cbBuffer;
/* Free the decoded challenge */
free(chlg);
return result;
}
/*
* Curl_auth_create_spnego_message()
*
* This is used to generate an already encoded SPNEGO (Negotiate) response
* message ready for sending to the recipient.
*
* Parameters:
*
* data [in] - The session handle.
* nego [in/out] - The Negotiate data struct being used and modified.
* outptr [in/out] - The address where a pointer to newly allocated memory
* holding the result will be stored upon completion.
* outlen [out] - The length of the output message.
*
* Returns CURLE_OK on success.
*/
CURLcode Curl_auth_create_spnego_message(struct SessionHandle *data,
struct negotiatedata *nego,
char **outptr, size_t *outlen)
{
CURLcode result;
/* Base64 encode the already generated response */
result = Curl_base64_encode(data,
(const char*) nego->output_token,
nego->output_token_length,
outptr, outlen);
if(result)
return result;
if(!*outptr || !*outlen)
return CURLE_REMOTE_ACCESS_DENIED;
return CURLE_OK;
}
/*
* Curl_auth_spnego_cleanup()
*
* This is used to clean up the SPNEGO (Negotiate) specific data.
*
* Parameters:
*
* nego [in/out] - The Negotiate data struct being cleaned up.
*
*/
void Curl_auth_spnego_cleanup(struct negotiatedata* nego)
{
/* Free our security context */
if(nego->context) {
s_pSecFn->DeleteSecurityContext(nego->context);
free(nego->context);
nego->context = NULL;
}
/* Free our credentials handle */
if(nego->credentials) {
s_pSecFn->FreeCredentialsHandle(nego->credentials);
free(nego->credentials);
nego->credentials = NULL;
}
/* Free our identity */
Curl_sspi_free_identity(nego->p_identity);
nego->p_identity = NULL;
/* Free the SPN and output token */
Curl_safefree(nego->server_name);
Curl_safefree(nego->output_token);
/* Reset any variables */
nego->token_max = 0;
}
#endif /* USE_WINDOWS_SSPI && USE_SPNEGO */

30
lib/vauth/vauth.h
View File

@ -38,6 +38,14 @@ struct ntlmdata;
struct kerberos5data;
#endif
#if defined(USE_WINDOWS_SSPI) && defined(USE_SPNEGO)
struct negotiatedata;
#endif
#if defined(USE_WINDOWS_SSPI)
#define GSS_ERROR(status) (status & 0x80000000)
#endif
/* This is used to build a SPN string */
#if !defined(USE_WINDOWS_SSPI)
char *Curl_auth_build_spn(const char *service, const char *instance);
@ -157,4 +165,26 @@ CURLcode Curl_auth_create_gssapi_security_message(struct SessionHandle *data,
void Curl_auth_gssapi_cleanup(struct kerberos5data *krb5);
#endif /* USE_KERBEROS5 */
#if defined(USE_WINDOWS_SSPI) && defined(USE_SPNEGO)
/* This is used to decode a base64 encoded SPNEGO (Negotiate) challenge
message */
CURLcode Curl_auth_decode_spnego_message(struct SessionHandle *data,
const char *user,
const char *passwood,
const char *service,
const char *host,
const char *chlg64,
struct negotiatedata *nego);
/* This is used to generate a base64 encoded SPNEGO (Negotiate) response
message */
CURLcode Curl_auth_create_spnego_message(struct SessionHandle *data,
struct negotiatedata *nego,
char **outptr, size_t *outlen);
/* This is used to clean up the SPNEGO specifiec data */
void Curl_auth_spnego_cleanup(struct negotiatedata* nego);
#endif /* USE_WINDOWS_SSPI && USE_SPNEGO */
#endif /* HEADER_CURL_VAUTH_H */

2
packages/Symbian/group/libcurl.mmp
View File

@ -42,7 +42,7 @@ SOURCE \
curl_sasl_sspi.c smb.c curl_endian.c curl_des.c \
vauth/vauth.c vauth/cleartext.c vauth/cram.c vauth/digest.c \
vauth/digest_sspi.c vauth/krb5_gssapi.c vauth/krb5_sspi.c \
vauth/ntlm.c vauth/ntlm_sspi.c vauth/oauth2.c
vauth/ntlm.c vauth/ntlm_sspi.c vauth/oauth2.c vauth/spnego_sspi.c
USERINCLUDE ../../../lib ../../../include/curl
#ifdef ENABLE_SSL