void
_gssapi_encap_length (size_t data_len,
size_t *len,
size_t *total_len,
const gss_OID mech)
{
size_t len_len;
*len = 1 + 1 + mech->length + data_len;
len_len = der_length_len(*len);
*total_len = 1 + len_len + *len;
}
void *
_gssapi_make_mech_header(void *ptr,
size_t len,
const gss_OID mech)
{
u_char *p = ptr;
int e;
size_t len_len, foo;
*p++ = 0x60;
len_len = der_length_len(len);
e = der_put_length (p + len_len - 1, len_len, len, &foo);
if(e || foo != len_len)
abort ();
p += len_len;
*p++ = 0x06;
*p++ = mech->length;
memcpy (p, mech->elements, mech->length);
p += mech->length;
return p;
}
static OM_uint32
spnego_initial
(OM_uint32 * minor_status,
gssspnego_cred cred,
gss_ctx_id_t * context_handle,
const gss_name_t target_name,
const gss_OID mech_type,
OM_uint32 req_flags,
OM_uint32 time_req,
const gss_channel_bindings_t input_chan_bindings,
const gss_buffer_t input_token,
gss_OID * actual_mech_type,
gss_buffer_t output_token,
OM_uint32 * ret_flags,
OM_uint32 * time_rec
)
{
NegTokenInit ni;
int ret;
OM_uint32 sub, minor;
gss_buffer_desc mech_token;
u_char *buf;
size_t buf_size, buf_len;
gss_buffer_desc data;
size_t ni_len;
gss_ctx_id_t context;
gssspnego_ctx ctx;
spnego_name name = (spnego_name)target_name;
*minor_status = 0;
memset (&ni, 0, sizeof(ni));
*context_handle = GSS_C_NO_CONTEXT;
if (target_name == GSS_C_NO_NAME)
return GSS_S_BAD_NAME;
sub = _gss_spnego_alloc_sec_context(&minor, &context);
if (GSS_ERROR(sub)) {
*minor_status = minor;
return sub;
}
ctx = (gssspnego_ctx)context;
HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
ctx->local = 1;
sub = gss_import_name(&minor, &name->value, &name->type, &ctx->target_name);
if (GSS_ERROR(sub)) {
*minor_status = minor;
_gss_spnego_internal_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
return sub;
}
sub = _gss_spnego_indicate_mechtypelist(&minor,
ctx->target_name,
initiator_approved,
0,
cred,
&ni.mechTypes,
&ctx->preferred_mech_type);
if (GSS_ERROR(sub)) {
*minor_status = minor;
_gss_spnego_internal_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
return sub;
}
ni.reqFlags = NULL;
/*
* If we have a credential handle, use it to select the mechanism
* that we will use
*/
/* generate optimistic token */
sub = gss_init_sec_context(&minor,
(cred != NULL) ? cred->negotiated_cred_id :
GSS_C_NO_CREDENTIAL,
&ctx->negotiated_ctx_id,
ctx->target_name,
ctx->preferred_mech_type,
req_flags,
time_req,
input_chan_bindings,
input_token,
&ctx->negotiated_mech_type,
&mech_token,
&ctx->mech_flags,
&ctx->mech_time_rec);
if (GSS_ERROR(sub)) {
free_NegTokenInit(&ni);
*minor_status = minor;
gss_mg_collect_error(ctx->preferred_mech_type, sub, minor);
_gss_spnego_internal_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
return sub;
}
if (sub == GSS_S_COMPLETE)
ctx->maybe_open = 1;
if (mech_token.length != 0) {
ALLOC(ni.mechToken, 1);
if (ni.mechToken == NULL) {
free_NegTokenInit(&ni);
gss_release_buffer(&minor, &mech_token);
_gss_spnego_internal_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
ni.mechToken->length = mech_token.length;
ni.mechToken->data = malloc(mech_token.length);
if (ni.mechToken->data == NULL && mech_token.length != 0) {
free_NegTokenInit(&ni);
gss_release_buffer(&minor, &mech_token);
*minor_status = ENOMEM;
_gss_spnego_internal_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
return GSS_S_FAILURE;
}
memcpy(ni.mechToken->data, mech_token.value, mech_token.length);
gss_release_buffer(&minor, &mech_token);
} else
ni.mechToken = NULL;
ni.mechListMIC = NULL;
ni_len = length_NegTokenInit(&ni);
buf_size = 1 + der_length_len(ni_len) + ni_len;
buf = malloc(buf_size);
if (buf == NULL) {
free_NegTokenInit(&ni);
*minor_status = ENOMEM;
_gss_spnego_internal_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
return GSS_S_FAILURE;
}
ret = encode_NegTokenInit(buf + buf_size - 1,
ni_len,
&ni, &buf_len);
if (ret == 0 && ni_len != buf_len)
abort();
if (ret == 0) {
size_t tmp;
ret = der_put_length_and_tag(buf + buf_size - buf_len - 1,
buf_size - buf_len,
buf_len,
ASN1_C_CONTEXT,
CONS,
0,
&tmp);
if (ret == 0 && tmp + buf_len != buf_size)
abort();
}
if (ret) {
*minor_status = ret;
free(buf);
free_NegTokenInit(&ni);
_gss_spnego_internal_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
return GSS_S_FAILURE;
}
data.value = buf;
data.length = buf_size;
ctx->initiator_mech_types.len = ni.mechTypes.len;
ctx->initiator_mech_types.val = ni.mechTypes.val;
ni.mechTypes.len = 0;
ni.mechTypes.val = NULL;
free_NegTokenInit(&ni);
sub = gss_encapsulate_token(&data,
GSS_SPNEGO_MECHANISM,
output_token);
free (buf);
if (sub) {
_gss_spnego_internal_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
return sub;
}
if (actual_mech_type)
*actual_mech_type = ctx->negotiated_mech_type;
if (ret_flags)
*ret_flags = ctx->mech_flags;
if (time_rec)
*time_rec = ctx->mech_time_rec;
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
*context_handle = context;
return GSS_S_CONTINUE_NEEDED;
}
