static void auth_register(ne_session *sess, int isproxy,
const struct auth_class *ahc, const char *id,
ne_auth_creds creds, void *userdata)
{
auth_session *ahs = ne_calloc(sizeof *ahs);
ahs->creds = creds;
ahs->userdata = userdata;
ahs->sess = sess;
ahs->spec = ahc;
if (strcmp(ne_get_scheme(sess), "https") == 0) {
ahs->context = isproxy ? AUTH_CONNECT : AUTH_NOTCONNECT;
#ifdef HAVE_GSSAPI
{
get_gss_name(&ahs->gssname, (isproxy ? sess->proxy.hostname
: sess->server.hostname));
ahs->gssctx = GSS_C_NO_CONTEXT;
ahs->gssmech = GSS_C_NO_OID;
}
#endif
} else {
ahs->context = AUTH_ANY;
}
/* Register hooks */
ne_hook_create_request(sess, ah_create, ahs);
ne_hook_pre_send(sess, ah_pre_send, ahs);
ne_hook_post_send(sess, ah_post_send, ahs);
ne_hook_destroy_request(sess, ah_destroy, ahs);
ne_hook_destroy_session(sess, free_auth, ahs);
ne_set_session_private(sess, id, ahs);
}
int Curl_input_negotiate(struct connectdata *conn, char *header)
{
struct negotiatedata *neg_ctx = &conn->data->state.negotiate;
OM_uint32 major_status, minor_status, minor_status2;
gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
int ret;
size_t len;
bool gss;
const char* protocol;
while(*header && ISSPACE(*header))
header++;
if(checkprefix("GSS-Negotiate", header)) {
protocol = "GSS-Negotiate";
gss = TRUE;
}
else if (checkprefix("Negotiate", header)) {
protocol = "Negotiate";
gss = FALSE;
}
else
return -1;
if (neg_ctx->context) {
if (neg_ctx->gss != gss) {
return -1;
}
}
else {
neg_ctx->protocol = protocol;
neg_ctx->gss = gss;
}
if (neg_ctx->context && neg_ctx->status == GSS_S_COMPLETE) {
/* We finished succesfully 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(conn->data);
return -1;
}
if (neg_ctx->server_name == NULL &&
(ret = get_gss_name(conn, &neg_ctx->server_name)))
return ret;
header += strlen(neg_ctx->protocol);
while(*header && ISSPACE(*header))
header++;
len = strlen(header);
if (len > 0) {
int rawlen = Curl_base64_decode(header, (unsigned char **)&input_token.value);
if (rawlen < 0)
return -1;
input_token.length = rawlen;
#ifdef HAVE_SPNEGO /* Handle SPNEGO */
if (checkprefix("Negotiate", header)) {
ASN1_OBJECT * object = NULL;
int rc = 1;
unsigned char * spnegoToken = NULL;
size_t spnegoTokenLength = 0;
unsigned char * mechToken = NULL;
size_t mechTokenLength = 0;
spnegoToken = malloc(input_token.length);
if (input_token.value == NULL)
return ENOMEM;
spnegoTokenLength = input_token.length;
object = OBJ_txt2obj ("1.2.840.113554.1.2.2", 1);
if (!parseSpnegoTargetToken(spnegoToken,
spnegoTokenLength,
NULL,
NULL,
&mechToken,
&mechTokenLength,
NULL,
NULL)) {
free(spnegoToken);
spnegoToken = NULL;
infof(conn->data, "Parse SPNEGO Target Token failed\n");
}
else {
free(input_token.value);
input_token.value = NULL;
input_token.value = malloc(mechTokenLength);
memcpy(input_token.value, mechToken,mechTokenLength);
input_token.length = mechTokenLength;
free(mechToken);
mechToken = NULL;
infof(conn->data, "Parse SPNEGO Target Token succeeded\n");
}
}
#endif
}
major_status = gss_init_sec_context(&minor_status,
GSS_C_NO_CREDENTIAL,
&neg_ctx->context,
neg_ctx->server_name,
GSS_C_NO_OID,
GSS_C_DELEG_FLAG,
0,
GSS_C_NO_CHANNEL_BINDINGS,
&input_token,
NULL,
&output_token,
NULL,
NULL);
if (input_token.length > 0)
gss_release_buffer(&minor_status2, &input_token);
neg_ctx->status = major_status;
if (GSS_ERROR(major_status)) {
/* Curl_cleanup_negotiate(conn->data) ??? */
log_gss_error(conn, minor_status,
(char *)"gss_init_sec_context() failed: ");
return -1;
}
if (output_token.length == 0) {
return -1;
}
neg_ctx->output_token = output_token;
/* conn->bits.close = FALSE; */
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)
{
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 lifetime;
TCHAR *sname;
int ret;
size_t len = 0, input_token_len = 0;
bool gss = FALSE;
const char* protocol;
CURLcode error;
while(*header && ISSPACE(*header))
header++;
if(checkprefix("GSS-Negotiate", header)) {
protocol = "GSS-Negotiate";
gss = TRUE;
}
else if(checkprefix("Negotiate", header)) {
protocol = "Negotiate";
gss = FALSE;
}
else
return -1;
if(neg_ctx->context) {
if(neg_ctx->gss != gss) {
return -1;
}
}
else {
neg_ctx->protocol = protocol;
neg_ctx->gss = gss;
}
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(conn->data);
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("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->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(neg_ctx->protocol);
while(*header && ISSPACE(*header))
header++;
len = strlen(header);
if(!len) {
/* first call in a new negotation, 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;
neg_ctx->status =
s_pSecFn->AcquireCredentialsHandle(NULL,
(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 == 0)
return -1;
}
/* 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;
if(input_token) {
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;
}
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 : 0,
sname,
ISC_REQ_CONFIDENTIALITY,
0,
SECURITY_NATIVE_DREP,
input_token ? &in_buff_desc : 0,
0,
neg_ctx->context,
&out_buff_desc,
&context_attributes,
&lifetime);
Curl_unicodefree(sname);
if(GSS_ERROR(neg_ctx->status))
return -1;
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 -1;
}
neg_ctx->output_token_length = out_sec_buff.cbBuffer;
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)
{
struct SessionHandle *data = conn->data;
struct negotiatedata *neg_ctx = proxy?&data->state.proxyneg:
&data->state.negotiate;
OM_uint32 major_status, minor_status, discard_st, min_stat;
gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
int ret;
size_t len;
size_t rawlen = 0;
bool gss;
const char* protocol;
CURLcode error;
while(*header && ISSPACE(*header))
header++;
if(checkprefix("GSS-Negotiate", header)) {
protocol = "GSS-Negotiate";
gss = TRUE;
}
else if(checkprefix("Negotiate", header)) {
protocol = "Negotiate";
gss = FALSE;
}
else
return -1;
if(neg_ctx->context) {
if(neg_ctx->gss != gss) {
return -1;
}
}
else {
neg_ctx->protocol = protocol;
neg_ctx->gss = gss;
}
if(neg_ctx->context && neg_ctx->status == GSS_S_COMPLETE) {
/* 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 -1;
}
if(neg_ctx->server_name == NULL &&
(ret = get_gss_name(conn, proxy, &neg_ctx->server_name)))
return ret;
header += strlen(neg_ctx->protocol);
while(*header && ISSPACE(*header))
header++;
len = strlen(header);
if(len > 0) {
error = Curl_base64_decode(header,
(unsigned char **)&input_token.value, &rawlen);
if(error || rawlen == 0)
return -1;
input_token.length = rawlen;
DEBUGASSERT(input_token.value != NULL);
#ifdef HAVE_SPNEGO /* Handle SPNEGO */
if(checkprefix("Negotiate", header)) {
unsigned char *spnegoToken = NULL;
size_t spnegoTokenLength = 0;
gss_buffer_desc mechToken = GSS_C_EMPTY_BUFFER;
spnegoToken = malloc(input_token.length);
if(spnegoToken == NULL) {
Curl_safefree(input_token.value);
return CURLE_OUT_OF_MEMORY;
}
memcpy(spnegoToken, input_token.value, input_token.length);
spnegoTokenLength = input_token.length;
if(!parseSpnegoTargetToken(spnegoToken,
spnegoTokenLength,
NULL,
NULL,
(unsigned char**)&mechToken.value,
&mechToken.length,
NULL,
NULL)) {
Curl_safefree(spnegoToken);
infof(data, "Parse SPNEGO Target Token failed\n");
}
else if(!mechToken.value || !mechToken.length) {
Curl_safefree(spnegoToken);
if(mechToken.value)
gss_release_buffer(&discard_st, &mechToken);
infof(data, "Parse SPNEGO Target Token succeeded (NULL token)\n");
}
else {
Curl_safefree(spnegoToken);
Curl_safefree(input_token.value);
input_token.value = malloc(mechToken.length);
if(input_token.value == NULL) {
gss_release_buffer(&discard_st, &mechToken);
return CURLE_OUT_OF_MEMORY;
}
memcpy(input_token.value, mechToken.value, mechToken.length);
input_token.length = mechToken.length;
gss_release_buffer(&discard_st, &mechToken);
infof(data, "Parse SPNEGO Target Token succeeded\n");
}
}
#endif
}
major_status = Curl_gss_init_sec_context(conn,
&minor_status,
&neg_ctx->context,
neg_ctx->server_name,
GSS_C_NO_CHANNEL_BINDINGS,
&input_token,
&output_token,
NULL);
gss_release_cred(&min_stat, &conn->data->curl_gss_creds);
Curl_safefree(input_token.value);
/*To remove the memory leak issue*/
if(neg_ctx->server_name != GSS_C_NO_NAME)
gss_release_name(&min_stat, &neg_ctx->server_name);
neg_ctx->status = major_status;
if(GSS_ERROR(major_status)) {
if(output_token.value)
gss_release_buffer(&discard_st, &output_token);
log_gss_error(conn, minor_status, "KRB5_ERROR: gss_init_sec_context() failed: ");
printf("\n KRB5_ERROR: gss_init_sec_context() failed error code : %d", minor_status);
return -1;
}
if(!output_token.value || !output_token.length) {
if(output_token.value)
gss_release_buffer(&discard_st, &output_token);
return -1;
}
neg_ctx->output_token = output_token;
return 0;
}
