#ifdef USE_WINDOWS_SSPI
-#if !defined(CURL_DISABLE_HTTP) && defined(USE_SPNEGO)
+#if !defined(CURL_DISABLE_HTTP) && defined(USE_HTTP_NEGOTIATE)
#include "urldata.h"
#include "sendf.h"
#include "rawstr.h"
#include "warnless.h"
#include "curl_base64.h"
-#include "curl_sasl.h"
#include "http_negotiate.h"
#include "curl_memory.h"
#include "curl_multibyte.h"
/* The last #include file should be: */
#include "memdebug.h"
+static int
+get_gss_name(struct connectdata *conn, bool proxy,
+ struct negotiatedata *neg_ctx)
+{
+ const char* service;
+ size_t length;
+
+ if(proxy && !conn->proxy.name)
+ /* proxy auth requested but no given proxy name, error out! */
+ return -1;
+
+ /* GSSAPI implementation by Globus (known as GSI) requires the name to be
+ of form "<service>/<fqdn>" instead of <service>@<fqdn> (ie. slash instead
+ of at-sign). Also GSI servers are often identified as 'host' not 'khttp'.
+ Change following lines if you want to use GSI */
+
+ /* IIS uses the <service>@<fqdn> form but uses 'http' as the service name,
+ and SSPI then generates an NTLM token. When using <service>/<fqdn> a
+ Kerberos token is generated. */
+
+ if(neg_ctx->gss)
+ service = "KHTTP";
+ else
+ service = "HTTP";
+
+ length = strlen(service) + 1 + strlen(proxy ? conn->proxy.name :
+ conn->host.name) + 1;
+ if(length + 1 > sizeof(neg_ctx->server_name))
+ return EMSGSIZE;
+
+ snprintf(neg_ctx->server_name, sizeof(neg_ctx->server_name), "%s/%s",
+ service, proxy ? conn->proxy.name : conn->host.name);
+
+ return 0;
+}
+
/* returning zero (0) means success, everything else is treated as "failure"
with no care exactly what the failure was */
int Curl_input_negotiate(struct connectdata *conn, bool proxy,
const char *header)
{
- BYTE *input_token = NULL;
+ struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
+ &conn->data->state.negotiate;
+ BYTE *input_token = 0;
SecBufferDesc out_buff_desc;
SecBuffer out_sec_buff;
SecBufferDesc in_buff_desc;
SecBuffer in_sec_buff;
unsigned long context_attributes;
- TimeStamp expiry;
+ TimeStamp lifetime;
+ TCHAR *sname;
int ret;
size_t len = 0, input_token_len = 0;
+ bool gss = FALSE;
+ const char* protocol;
CURLcode error;
- /* Point to the username and password */
- const char *userp;
- const char *passwdp;
-
- /* Point to the correct struct with this */
- struct negotiatedata *neg_ctx;
+ if(checkprefix("GSS-Negotiate", header)) {
+ protocol = "GSS-Negotiate";
+ gss = TRUE;
+ }
+ else if(checkprefix("Negotiate", header)) {
+ protocol = "Negotiate";
+ gss = FALSE;
+ }
+ else
+ return -1;
- if(proxy) {
- userp = conn->proxyuser;
- passwdp = conn->proxypasswd;
- neg_ctx = &conn->data->state.proxyneg;
+ if(neg_ctx->context) {
+ if(neg_ctx->gss != gss) {
+ return -1;
+ }
}
else {
- userp = conn->user;
- passwdp = conn->passwd;
- neg_ctx = &conn->data->state.negotiate;
+ neg_ctx->protocol = protocol;
+ neg_ctx->gss = gss;
}
- /* Not set means empty */
- if(!userp)
- userp = "";
-
- 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
return -1;
}
- if(!neg_ctx->server_name) {
- /* Check proxy auth requested but no given proxy name */
- if(proxy && !conn->proxy.name)
- return -1;
-
- /* Generate our SPN */
- neg_ctx->server_name = Curl_sasl_build_spn("HTTP",
- proxy ? conn->proxy.name :
- conn->host.name);
- if(!neg_ctx->server_name)
- return -1;
+ if(0 == strlen(neg_ctx->server_name)) {
+ ret = get_gss_name(conn, proxy, neg_ctx);
+ if(ret)
+ return ret;
}
if(!neg_ctx->output_token) {
PSecPkgInfo SecurityPackage;
- ret = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT(SP_NAME_NEGOTIATE),
+ ret = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT("Negotiate"),
&SecurityPackage);
if(ret != SEC_E_OK)
return -1;
/* 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);
+ neg_ctx->max_token_length = SecurityPackage->cbMaxToken;
+ neg_ctx->output_token = malloc(neg_ctx->max_token_length);
s_pSecFn->FreeContextBuffer(SecurityPackage);
}
/* Obtain the input token, if any */
- header += strlen("Negotiate");
+ header += strlen(neg_ctx->protocol);
while(*header && ISSPACE(*header))
header++;
len = strlen(header);
if(!len) {
- /* Is this the first call in a new negotiation? */
- if(neg_ctx->context) {
- /* The server rejected our authentication and hasn't suppled any more
- negotiation mechanisms */
- return -1;
- }
+ /* first call in a new negotation, we have to acquire credentials,
+ and allocate memory for the context */
- /* 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 -1;
- if(userp && *userp) {
- /* Populate our identity structure */
- error = Curl_create_sspi_identity(userp, passwdp, &neg_ctx->identity);
- if(error)
- return -1;
-
- /* 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);
+ (TCHAR *) TEXT("Negotiate"),
+ SECPKG_CRED_OUTBOUND, NULL, NULL,
+ NULL, NULL, neg_ctx->credentials,
+ &lifetime);
if(neg_ctx->status != SEC_E_OK)
return -1;
}
else {
+ input_token = malloc(neg_ctx->max_token_length);
+ if(!input_token)
+ return -1;
+
error = Curl_base64_decode(header,
(unsigned char **)&input_token,
&input_token_len);
- if(error || !input_token_len)
+ if(error || input_token_len == 0)
return -1;
}
- /* Setup the "output" security buffer */
- out_buff_desc.ulVersion = SECBUFFER_VERSION;
+ /* prepare the output buffers, and input buffers if present */
+ out_buff_desc.ulVersion = 0;
out_buff_desc.cBuffers = 1;
out_buff_desc.pBuffers = &out_sec_buff;
+
+ out_sec_buff.cbBuffer = curlx_uztoul(neg_ctx->max_token_length);
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.ulVersion = 0;
in_buff_desc.cBuffers = 1;
in_buff_desc.pBuffers = &in_sec_buff;
+
+ in_sec_buff.cbBuffer = curlx_uztoul(input_token_len);
in_sec_buff.BufferType = SECBUFFER_TOKEN;
in_sec_buff.pvBuffer = input_token;
- in_sec_buff.cbBuffer = curlx_uztoul(input_token_len);
}
- /* Generate our message */
+ sname = Curl_convert_UTF8_to_tchar(neg_ctx->server_name);
+ if(!sname)
+ return CURLE_OUT_OF_MEMORY;
+
neg_ctx->status = s_pSecFn->InitializeSecurityContext(
neg_ctx->credentials,
- input_token ? neg_ctx->context : NULL,
- neg_ctx->server_name,
+ input_token ? neg_ctx->context : 0,
+ sname,
ISC_REQ_CONFIDENTIALITY,
0,
SECURITY_NATIVE_DREP,
- input_token ? &in_buff_desc : NULL,
+ input_token ? &in_buff_desc : 0,
0,
neg_ctx->context,
&out_buff_desc,
&context_attributes,
- &expiry);
+ &lifetime);
- Curl_safefree(input_token);
+ Curl_unicodefree(sname);
if(GSS_ERROR(neg_ctx->status))
return -1;
if(error)
return error;
- if(!len)
+ if(len == 0)
return CURLE_REMOTE_ACCESS_DENIED;
- userp = aprintf("%sAuthorization: Negotiate %s\r\n", proxy ? "Proxy-" : "",
- encoded);
+ userp = aprintf("%sAuthorization: %s %s\r\n", proxy ? "Proxy-" : "",
+ neg_ctx->protocol, encoded);
- if(proxy) {
- Curl_safefree(conn->allocptr.proxyuserpwd);
+ if(proxy)
conn->allocptr.proxyuserpwd = userp;
- }
- else {
- Curl_safefree(conn->allocptr.userpwd);
+ else
conn->allocptr.userpwd = userp;
- }
free(encoded);
+ Curl_cleanup_negotiate (conn->data);
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;
+ neg_ctx->context = 0;
}
- /* Free our credentials handle */
if(neg_ctx->credentials) {
s_pSecFn->FreeCredentialsHandle(neg_ctx->credentials);
free(neg_ctx->credentials);
- neg_ctx->credentials = NULL;
+ neg_ctx->credentials = 0;
}
- /* 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);
+ if(neg_ctx->output_token) {
+ free(neg_ctx->output_token);
+ neg_ctx->output_token = 0;
+ }
- /* Reset any variables */
- neg_ctx->token_max = 0;
+ neg_ctx->max_token_length = 0;
}
void Curl_cleanup_negotiate(struct SessionHandle *data)
cleanup(&data->state.proxyneg);
}
-#endif /* !CURL_DISABLE_HTTP && USE_SPNEGO */
+#endif /* !CURL_DISABLE_HTTP && USE_HTTP_NEGOTIATE */
#endif /* USE_WINDOWS_SSPI */
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