}
static OM_uint32
+gssEapSupportedInitiatorExts[] = {
+};
+
+static struct gss_eap_itok_map
+gssEapAcceptorExtsFlagMap[] = {
+ { ITOK_TYPE_REAUTH_CREDS, CTX_FLAG_KRB_REAUTH_SUPPORTED },
+};
+
+static OM_uint32
+eapGssSmAcceptExts(OM_uint32 *minor,
+ gss_cred_id_t cred GSSEAP_UNUSED,
+ gss_ctx_id_t ctx GSSEAP_UNUSED,
+ gss_name_t target GSSEAP_UNUSED,
+ gss_OID mech GSSEAP_UNUSED,
+ OM_uint32 reqFlags GSSEAP_UNUSED,
+ OM_uint32 timeReq GSSEAP_UNUSED,
+ gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
+ gss_buffer_t inputToken,
+ gss_buffer_t outputToken,
+ OM_uint32 *smFlags GSSEAP_UNUSED)
+{
+ OM_uint32 major;
+
+ major = gssEapProcessSupportedExts(minor, inputToken,
+ gssEapAcceptorExtsFlagMap,
+ sizeof(gssEapAcceptorExtsFlagMap) /
+ sizeof(gssEapAcceptorExtsFlagMap[0]),
+ &ctx->flags);
+ if (GSS_ERROR(major))
+ return major;
+
+ major = gssEapEncodeSupportedExts(minor,
+ gssEapSupportedInitiatorExts,
+ sizeof(gssEapSupportedInitiatorExts) /
+ sizeof(gssEapSupportedInitiatorExts[0]),
+ outputToken);
+ if (GSS_ERROR(major))
+ return major;
+
+ return GSS_S_CONTINUE_NEEDED;
+}
+
+static OM_uint32
eapGssSmAcceptAcceptorName(OM_uint32 *minor,
gss_cred_id_t cred GSSEAP_UNUSED,
gss_ctx_id_t ctx,
GSSEAP_SM_TRANSITION_NEXT(ctx);
*minor = 0;
- *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
+ *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
return GSS_S_CONTINUE_NEEDED;
}
major = GSS_S_CONTINUE_NEEDED;
*minor = 0;
- *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
+ *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
cleanup:
if (request != NULL)
}
static OM_uint32
+eapGssSmAcceptGssFlags(OM_uint32 *minor,
+ gss_cred_id_t cred GSSEAP_UNUSED,
+ gss_ctx_id_t ctx,
+ gss_name_t target GSSEAP_UNUSED,
+ gss_OID mech GSSEAP_UNUSED,
+ OM_uint32 reqFlags GSSEAP_UNUSED,
+ OM_uint32 timeReq GSSEAP_UNUSED,
+ gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
+ gss_buffer_t inputToken,
+ gss_buffer_t outputToken GSSEAP_UNUSED,
+ OM_uint32 *smFlags GSSEAP_UNUSED)
+{
+ unsigned char *p;
+ OM_uint32 initiatorGssFlags;
+
+ assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
+
+ if (inputToken->length < 4) {
+ *minor = GSSEAP_TOK_TRUNC;
+ return GSS_S_DEFECTIVE_TOKEN;
+ }
+
+ /* allow flags to grow for future expansion */
+ p = (unsigned char *)inputToken->value + inputToken->length - 4;
+
+ initiatorGssFlags = load_uint32_be(p);
+ initiatorGssFlags &= GSSEAP_WIRE_FLAGS_MASK;
+
+ ctx->gssFlags |= initiatorGssFlags;
+
+ return GSS_S_CONTINUE_NEEDED;
+}
+
+static OM_uint32
eapGssSmAcceptGssChannelBindings(OM_uint32 *minor,
gss_cred_id_t cred GSSEAP_UNUSED,
gss_ctx_id_t ctx,
OM_uint32 major, tmpMinor;
gss_iov_buffer_desc iov[2];
+ assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
+
iov[0].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;
iov[0].buffer.length = 0;
iov[0].buffer.value = NULL;
* If we're built with fast reauthentication enabled, then
* fabricate a ticket from the initiator to ourselves.
*/
- major = gssEapMakeReauthCreds(minor, ctx, cred, outputToken);
+ if (ctx->flags & CTX_FLAG_KRB_REAUTH_SUPPORTED)
+ major = gssEapMakeReauthCreds(minor, ctx, cred, outputToken);
+ else
+ major = GSS_S_UNAVAILABLE;
+
if (major == GSS_S_UNAVAILABLE)
major = GSS_S_COMPLETE;
- if (major == GSS_S_COMPLETE)
- major = GSS_S_CONTINUE_NEEDED;
- return major;
+ return GSS_ERROR(major) ? major : GSS_S_CONTINUE_NEEDED;
}
#endif
static OM_uint32
-eapGssSmAcceptCompleteInitiatorExts(OM_uint32 *minor,
- gss_cred_id_t cred GSSEAP_UNUSED,
- gss_ctx_id_t ctx,
- gss_name_t target GSSEAP_UNUSED,
- gss_OID mech GSSEAP_UNUSED,
- OM_uint32 reqFlags GSSEAP_UNUSED,
- OM_uint32 timeReq GSSEAP_UNUSED,
- gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
- gss_buffer_t inputToken GSSEAP_UNUSED,
- gss_buffer_t outputToken GSSEAP_UNUSED,
- OM_uint32 *smFlags GSSEAP_UNUSED)
+eapGssSmAcceptInitiatorMIC(OM_uint32 *minor,
+ gss_cred_id_t cred GSSEAP_UNUSED,
+ gss_ctx_id_t ctx,
+ gss_name_t target GSSEAP_UNUSED,
+ gss_OID mech GSSEAP_UNUSED,
+ OM_uint32 reqFlags GSSEAP_UNUSED,
+ OM_uint32 timeReq GSSEAP_UNUSED,
+ gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
+ gss_buffer_t inputToken,
+ gss_buffer_t outputToken GSSEAP_UNUSED,
+ OM_uint32 *smFlags GSSEAP_UNUSED)
{
+ OM_uint32 major;
+
+ assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
+
+ major = gssEapVerifyConversationMIC(minor, ctx, inputToken);
+ if (GSS_ERROR(major))
+ return major;
+
GSSEAP_SM_TRANSITION_NEXT(ctx);
*minor = 0;
}
static OM_uint32
-eapGssSmAcceptCompleteAcceptorExts(OM_uint32 *minor,
- gss_cred_id_t cred GSSEAP_UNUSED,
- gss_ctx_id_t ctx,
- gss_name_t target GSSEAP_UNUSED,
- gss_OID mech GSSEAP_UNUSED,
- OM_uint32 reqFlags GSSEAP_UNUSED,
- OM_uint32 timeReq GSSEAP_UNUSED,
- gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
- gss_buffer_t inputToken GSSEAP_UNUSED,
- gss_buffer_t outputToken GSSEAP_UNUSED,
- OM_uint32 *smFlags)
+eapGssSmAcceptAcceptorMIC(OM_uint32 *minor,
+ gss_cred_id_t cred GSSEAP_UNUSED,
+ gss_ctx_id_t ctx,
+ gss_name_t target GSSEAP_UNUSED,
+ gss_OID mech GSSEAP_UNUSED,
+ OM_uint32 reqFlags GSSEAP_UNUSED,
+ OM_uint32 timeReq GSSEAP_UNUSED,
+ gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
+ gss_buffer_t inputToken GSSEAP_UNUSED,
+ gss_buffer_t outputToken,
+ OM_uint32 *smFlags)
{
+ OM_uint32 major;
+
+ major = gssEapGetConversationMIC(minor, ctx, outputToken);
+ if (GSS_ERROR(major))
+ return major;
+
GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
*minor = 0;
- *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
+ *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
return GSS_S_COMPLETE;
}
+/*
+ * Acceptor state machine.
+ */
static struct gss_eap_sm eapGssAcceptorSm[] = {
+#ifdef GSSEAP_ENABLE_REAUTH
+ {
+ ITOK_TYPE_REAUTH_REQ,
+ ITOK_TYPE_REAUTH_RESP,
+ GSSEAP_STATE_INITIAL | GSSEAP_STATE_REAUTHENTICATE,
+ 0,
+ eapGssSmAcceptGssReauth,
+ },
+#endif
{
ITOK_TYPE_ACCEPTOR_NAME_REQ,
ITOK_TYPE_ACCEPTOR_NAME_RESP,
0,
eapGssSmAcceptAcceptorName
},
-#ifdef GSSEAP_DEBUG
{
- ITOK_TYPE_VENDOR_INFO,
- ITOK_TYPE_NONE,
+ ITOK_TYPE_SUPPORTED_ACCEPTOR_EXTS,
+ ITOK_TYPE_SUPPORTED_INITIATOR_EXTS,
GSSEAP_STATE_INITIAL,
0,
- eapGssSmAcceptVendorInfo,
+ eapGssSmAcceptExts,
},
-#endif
-#ifdef GSSEAP_ENABLE_REAUTH
+#ifdef GSSEAP_DEBUG
{
- ITOK_TYPE_REAUTH_REQ,
- ITOK_TYPE_REAUTH_RESP,
+ ITOK_TYPE_VENDOR_INFO,
+ ITOK_TYPE_NONE,
GSSEAP_STATE_INITIAL,
0,
- eapGssSmAcceptGssReauth,
+ eapGssSmAcceptVendorInfo,
},
#endif
{
eapGssSmAcceptAuthenticate
},
{
+ ITOK_TYPE_GSS_FLAGS,
+ ITOK_TYPE_NONE,
+ GSSEAP_STATE_INITIATOR_EXTS,
+ 0,
+ eapGssSmAcceptGssFlags
+ },
+ {
ITOK_TYPE_GSS_CHANNEL_BINDINGS,
ITOK_TYPE_NONE,
GSSEAP_STATE_INITIATOR_EXTS,
- SM_ITOK_FLAG_REQUIRED,
+ 0,
eapGssSmAcceptGssChannelBindings,
},
{
- ITOK_TYPE_NONE,
+ ITOK_TYPE_INITIATOR_MIC,
ITOK_TYPE_NONE,
GSSEAP_STATE_INITIATOR_EXTS,
- 0,
- eapGssSmAcceptCompleteInitiatorExts,
+ SM_ITOK_FLAG_REQUIRED,
+ eapGssSmAcceptInitiatorMIC,
},
#ifdef GSSEAP_ENABLE_REAUTH
{
#endif
{
ITOK_TYPE_NONE,
- ITOK_TYPE_NONE,
+ ITOK_TYPE_ACCEPTOR_MIC,
GSSEAP_STATE_ACCEPTOR_EXTS,
0,
- eapGssSmAcceptCompleteAcceptorExts
+ eapGssSmAcceptAcceptorMIC
},
};
gss_OID mech,
OM_uint32 reqFlags GSSEAP_UNUSED,
OM_uint32 timeReq GSSEAP_UNUSED,
- gss_channel_bindings_t chanBindings,
+ gss_channel_bindings_t userChanBindings,
gss_buffer_t inputToken,
gss_buffer_t outputToken,
OM_uint32 *smFlags)
OM_uint32 major, tmpMinor;
gss_name_t krbInitiator = GSS_C_NO_NAME;
OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
+ struct gss_channel_bindings_struct wireChanBindings = { 0 };
/*
* If we're built with fast reauthentication support, it's valid
ctx->flags |= CTX_FLAG_KRB_REAUTH;
+ /*
+ * To avoid an additional round trip, we use GSS channel bindings
+ * to integrity protect the rest of the initiator exchange. This
+ * does have the disadvantage of making it impossible for the
+ * acceptor to ignore application channel bindings, behaviour
+ * which differs from normal Kerberos and GSS-EAP itself.
+ */
+ major = gssEapMakeTokenChannelBindings(minor, ctx,
+ userChanBindings,
+ inputToken,
+ &wireChanBindings);
+ if (GSS_ERROR(major))
+ return major;
+
major = gssAcceptSecContext(minor,
- &ctx->kerberosCtx,
+ &ctx->reauthCtx,
cred->krbCred,
inputToken,
- chanBindings,
+ &wireChanBindings,
&krbInitiator,
&mech,
outputToken,
major = acceptReadyKrb(minor, ctx, cred,
krbInitiator, mech, timeRec);
if (major == GSS_S_COMPLETE) {
- GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
+ /* Generate acceptor MIC */
+ GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ACCEPTOR_EXTS);
}
ctx->gssFlags = gssFlags;
} else if (GSS_ERROR(major) &&
(*smFlags & SM_FLAG_INPUT_TOKEN_CRITICAL) == 0) {
- /* pretend reauthentication attempt never happened */
+ /* Fall back to EAP */
- gssDeleteSecContext(&tmpMinor, &ctx->kerberosCtx, GSS_C_NO_BUFFER);
+ gssDeleteSecContext(&tmpMinor, &ctx->reauthCtx, GSS_C_NO_BUFFER);
ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
- major = GSS_S_CONTINUE_NEEDED;
+ } else {
+ GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
}
+ major = GSS_S_CONTINUE_NEEDED;
+
gssReleaseName(&tmpMinor, &krbInitiator);
+ gss_release_buffer(&tmpMinor, &wireChanBindings.application_data);
return major;
}
#define CTX_FLAG_INITIATOR 0x00000001
#define CTX_FLAG_KRB_REAUTH 0x00000002
+#define CTX_FLAG_KRB_REAUTH_SUPPORTED 0x00000004
#define CTX_IS_INITIATOR(ctx) (((ctx)->flags & CTX_FLAG_INITIATOR) != 0)
struct gss_eap_acceptor_ctx acceptor;
#define acceptorCtx ctxU.acceptor
#ifdef GSSEAP_ENABLE_REAUTH
- gss_ctx_id_t kerberos;
- #define kerberosCtx ctxU.kerberos
+ gss_ctx_id_t reauth;
+ #define reauthCtx ctxU.reauth
#endif
} ctxU;
+ gss_buffer_desc conversation;
};
#define TOK_FLAG_SENDER_IS_ACCEPTOR 0x01
assert(cred->name != GSS_C_NO_NAME);
- if ((cred->name->flags & (NAME_FLAG_NAI | NAME_FLAG_SERVICE)) == 0) {
+ /*
+ * draft-ietf-abfab-gss-eap-01: the host portion is empty
+ * for initiators.
+ */
+ if ((cred->name->flags & NAME_FLAG_NAI) == 0) {
*minor = GSSEAP_BAD_INITIATOR_NAME;
return GSS_S_BAD_NAME;
}
gss_OID mech GSSEAP_UNUSED,
OM_uint32 reqFlags,
OM_uint32 timeReq,
- gss_channel_bindings_t chanBindings,
+ gss_channel_bindings_t userChanBindings,
gss_buffer_t inputToken,
gss_buffer_t outputToken,
- OM_uint32 *smFlags GSSEAP_UNUSED)
+ OM_uint32 *smFlags)
{
OM_uint32 major, tmpMinor;
gss_name_t mechTarget = GSS_C_NO_NAME;
gss_OID actualMech = GSS_C_NO_OID;
OM_uint32 gssFlags, timeRec;
+ struct gss_channel_bindings_struct wireChanBindings = { 0 };
assert(cred != GSS_C_NO_CREDENTIAL);
if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL) {
- if (!gssEapCanReauthP(cred, target, timeReq))
- return GSS_S_CONTINUE_NEEDED;
+ if (!gssEapCanReauthP(cred, target, timeReq)) {
+ major = GSS_S_CONTINUE_NEEDED;
+ goto cleanup;
+ }
+
+ major = gssEapMakeTokenChannelBindings(minor, ctx,
+ userChanBindings,
+ GSS_C_NO_BUFFER,
+ &wireChanBindings);
+ if (GSS_ERROR(major))
+ goto cleanup;
ctx->flags |= CTX_FLAG_KRB_REAUTH;
} else if ((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0) {
major = gssInitSecContext(minor,
cred->krbCred,
- &ctx->kerberosCtx,
+ &ctx->reauthCtx,
mechTarget,
(gss_OID)gss_mech_krb5,
reqFlags | GSS_C_MUTUAL_FLAG,
timeReq,
- chanBindings,
+ &wireChanBindings,
inputToken,
&actualMech,
outputToken,
major = gssEapReauthComplete(minor, ctx, cred, actualMech, timeRec);
if (GSS_ERROR(major))
goto cleanup;
- GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
+
+ GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ACCEPTOR_EXTS);
} else {
GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
+ *smFlags |= SM_FLAG_SEND_TOKEN;
}
+ major = GSS_S_CONTINUE_NEEDED;
+
cleanup:
gssReleaseName(&tmpMinor, &mechTarget);
+ gss_release_buffer(&tmpMinor, &wireChanBindings.application_data);
return major;
}
}
static OM_uint32
+gssEapSupportedAcceptorExts[] = {
+ ITOK_TYPE_REAUTH_CREDS,
+};
+
+static struct gss_eap_itok_map
+gssEapInitiatorExtsFlagMap[] = {
+};
+
+static OM_uint32
+eapGssSmInitExts(OM_uint32 *minor,
+ gss_cred_id_t cred GSSEAP_UNUSED,
+ gss_ctx_id_t ctx GSSEAP_UNUSED,
+ gss_name_t target GSSEAP_UNUSED,
+ gss_OID mech GSSEAP_UNUSED,
+ OM_uint32 reqFlags GSSEAP_UNUSED,
+ OM_uint32 timeReq GSSEAP_UNUSED,
+ gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
+ gss_buffer_t inputToken,
+ gss_buffer_t outputToken,
+ OM_uint32 *smFlags GSSEAP_UNUSED)
+{
+ OM_uint32 major = GSS_S_COMPLETE;
+
+ if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL) {
+ major = gssEapEncodeSupportedExts(minor,
+ gssEapSupportedAcceptorExts,
+ sizeof(gssEapSupportedAcceptorExts) /
+ sizeof(gssEapSupportedAcceptorExts[0]),
+ outputToken);
+ } else if (inputToken != GSS_C_NO_BUFFER) {
+ major = gssEapProcessSupportedExts(minor, inputToken,
+ gssEapInitiatorExtsFlagMap,
+ sizeof(gssEapInitiatorExtsFlagMap) /
+ sizeof(gssEapInitiatorExtsFlagMap[0]),
+ &ctx->flags);
+ }
+
+ if (GSS_ERROR(major))
+ return major;
+
+ return GSS_S_CONTINUE_NEEDED;
+}
+
+static OM_uint32
eapGssSmInitIdentity(OM_uint32 *minor,
gss_cred_id_t cred GSSEAP_UNUSED,
gss_ctx_id_t ctx,
OM_uint32 tmpMinor;
/* server didn't support reauthentication, sent EAP request */
- gssDeleteSecContext(&tmpMinor, &ctx->kerberosCtx, GSS_C_NO_BUFFER);
+ gssDeleteSecContext(&tmpMinor, &ctx->reauthCtx, GSS_C_NO_BUFFER);
ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
} else
#endif
- *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
+ *smFlags |= SM_FLAG_SEND_TOKEN;
assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
assert(inputToken == GSS_C_NO_BUFFER);
*minor = tmpMinor;
}
- *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
+ *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
}
wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
}
static OM_uint32
+eapGssSmInitGssFlags(OM_uint32 *minor,
+ gss_cred_id_t cred GSSEAP_UNUSED,
+ gss_ctx_id_t ctx,
+ gss_name_t target GSSEAP_UNUSED,
+ gss_OID mech GSSEAP_UNUSED,
+ OM_uint32 reqFlags GSSEAP_UNUSED,
+ OM_uint32 timeReq GSSEAP_UNUSED,
+ gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
+ gss_buffer_t inputToken GSSEAP_UNUSED,
+ gss_buffer_t outputToken,
+ OM_uint32 *smFlags GSSEAP_UNUSED)
+{
+ unsigned char wireFlags[4];
+ gss_buffer_desc flagsBuf;
+
+ store_uint32_be(ctx->gssFlags & GSSEAP_WIRE_FLAGS_MASK, wireFlags);
+
+ flagsBuf.length = sizeof(wireFlags);
+ flagsBuf.value = wireFlags;
+
+ return duplicateBuffer(minor, &flagsBuf, outputToken);
+}
+
+static OM_uint32
eapGssSmInitGssChannelBindings(OM_uint32 *minor,
gss_cred_id_t cred GSSEAP_UNUSED,
gss_ctx_id_t ctx,
gss_channel_bindings_t chanBindings,
gss_buffer_t inputToken GSSEAP_UNUSED,
gss_buffer_t outputToken,
- OM_uint32 *smFlags)
+ OM_uint32 *smFlags GSSEAP_UNUSED)
{
OM_uint32 major;
- gss_buffer_desc buffer = GSS_C_EMPTY_BUFFER;
- if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
- buffer = chanBindings->application_data;
-
- major = gssEapWrap(minor, ctx, TRUE, GSS_C_QOP_DEFAULT,
- &buffer, NULL, outputToken);
- if (GSS_ERROR(major))
- return major;
-
- assert(outputToken->value != NULL);
+ if ((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0 &&
+ chanBindings != GSS_C_NO_CHANNEL_BINDINGS) {
+ major = gssEapWrap(minor, ctx, TRUE, GSS_C_QOP_DEFAULT,
+ &chanBindings->application_data, NULL, outputToken);
+ if (GSS_ERROR(major))
+ return major;
+ }
*minor = 0;
- *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
-
return GSS_S_CONTINUE_NEEDED;
}
#endif /* GSSEAP_ENABLE_REAUTH */
static OM_uint32
-eapGssSmInitCompleteInitiatorExts(OM_uint32 *minor,
- gss_cred_id_t cred GSSEAP_UNUSED,
- gss_ctx_id_t ctx,
- gss_name_t target GSSEAP_UNUSED,
- gss_OID mech GSSEAP_UNUSED,
- OM_uint32 reqFlags GSSEAP_UNUSED,
- OM_uint32 timeReq GSSEAP_UNUSED,
- gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
- gss_buffer_t inputToken GSSEAP_UNUSED,
- gss_buffer_t outputToken GSSEAP_UNUSED,
- OM_uint32 *smFlags)
+eapGssSmInitInitiatorMIC(OM_uint32 *minor,
+ gss_cred_id_t cred GSSEAP_UNUSED,
+ gss_ctx_id_t ctx,
+ gss_name_t target GSSEAP_UNUSED,
+ gss_OID mech GSSEAP_UNUSED,
+ OM_uint32 reqFlags GSSEAP_UNUSED,
+ OM_uint32 timeReq GSSEAP_UNUSED,
+ gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
+ gss_buffer_t inputToken GSSEAP_UNUSED,
+ gss_buffer_t outputToken,
+ OM_uint32 *smFlags)
{
+ OM_uint32 major;
+
+ major = gssEapGetConversationMIC(minor, ctx, outputToken);
+ if (GSS_ERROR(major))
+ return major;
+
GSSEAP_SM_TRANSITION_NEXT(ctx);
*minor = 0;
- *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
+ *smFlags |= SM_FLAG_SEND_TOKEN | SM_FLAG_OUTPUT_TOKEN_CRITICAL;
return GSS_S_CONTINUE_NEEDED;
}
static OM_uint32
-eapGssSmInitCompleteAcceptorExts(OM_uint32 *minor,
- gss_cred_id_t cred GSSEAP_UNUSED,
- gss_ctx_id_t ctx,
- gss_name_t target GSSEAP_UNUSED,
- gss_OID mech GSSEAP_UNUSED,
- OM_uint32 reqFlags GSSEAP_UNUSED,
- OM_uint32 timeReq GSSEAP_UNUSED,
- gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
- gss_buffer_t inputToken GSSEAP_UNUSED,
- gss_buffer_t outputToken GSSEAP_UNUSED,
- OM_uint32 *smFlags GSSEAP_UNUSED)
+eapGssSmInitAcceptorMIC(OM_uint32 *minor,
+ gss_cred_id_t cred GSSEAP_UNUSED,
+ gss_ctx_id_t ctx,
+ gss_name_t target GSSEAP_UNUSED,
+ gss_OID mech GSSEAP_UNUSED,
+ OM_uint32 reqFlags GSSEAP_UNUSED,
+ OM_uint32 timeReq GSSEAP_UNUSED,
+ gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
+ gss_buffer_t inputToken,
+ gss_buffer_t outputToken GSSEAP_UNUSED,
+ OM_uint32 *smFlags GSSEAP_UNUSED)
{
+ OM_uint32 major;
+
+ major = gssEapVerifyConversationMIC(minor, ctx, inputToken);
+ if (GSS_ERROR(major))
+ return major;
+
GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
*minor = 0;
return GSS_S_COMPLETE;
}
+/*
+ * Initiator state machine.
+ */
static struct gss_eap_sm eapGssInitiatorSm[] = {
{
ITOK_TYPE_CONTEXT_ERR,
0,
eapGssSmInitAcceptorName
},
+ {
+ ITOK_TYPE_SUPPORTED_INITIATOR_EXTS,
+ ITOK_TYPE_SUPPORTED_ACCEPTOR_EXTS,
+ GSSEAP_STATE_INITIAL | GSSEAP_STATE_AUTHENTICATE,
+ 0,
+ eapGssSmInitExts
+ },
#ifdef GSSEAP_DEBUG
{
ITOK_TYPE_NONE,
},
{
ITOK_TYPE_NONE,
+ ITOK_TYPE_GSS_FLAGS,
+ GSSEAP_STATE_INITIATOR_EXTS,
+ 0,
+ eapGssSmInitGssFlags
+ },
+ {
+ ITOK_TYPE_NONE,
ITOK_TYPE_GSS_CHANNEL_BINDINGS,
GSSEAP_STATE_INITIATOR_EXTS,
- SM_ITOK_FLAG_REQUIRED,
+ 0,
eapGssSmInitGssChannelBindings
},
{
ITOK_TYPE_NONE,
- ITOK_TYPE_NONE,
+ ITOK_TYPE_INITIATOR_MIC,
GSSEAP_STATE_INITIATOR_EXTS,
0,
- eapGssSmInitCompleteInitiatorExts
+ eapGssSmInitInitiatorMIC
},
#ifdef GSSEAP_ENABLE_REAUTH
{
#endif
/* other extensions go here */
{
- ITOK_TYPE_NONE,
+ ITOK_TYPE_ACCEPTOR_MIC,
ITOK_TYPE_NONE,
GSSEAP_STATE_ACCEPTOR_EXTS,
- 0,
- eapGssSmInitCompleteAcceptorExts
+ SM_ITOK_FLAG_REQUIRED,
+ eapGssSmInitAcceptorMIC
}
};
#ifdef GSSEAP_ENABLE_REAUTH
if (ctx->flags & CTX_FLAG_KRB_REAUTH) {
- gssDeleteSecContext(&tmpMinor, &ctx->kerberosCtx, GSS_C_NO_BUFFER);
+ gssDeleteSecContext(&tmpMinor, &ctx->reauthCtx, GSS_C_NO_BUFFER);
} else
#endif
if (CTX_IS_INITIATOR(ctx)) {
gssEapReleaseOid(&tmpMinor, &ctx->mechanismUsed);
sequenceFree(&tmpMinor, &ctx->seqState);
gssEapReleaseCred(&tmpMinor, &ctx->defaultCred);
+ gss_release_buffer(&tmpMinor, &ctx->conversation);
GSSEAP_MUTEX_DESTROY(&ctx->mutex);
}
OM_uint32
-gssEapMakeToken(OM_uint32 *minor,
- gss_ctx_id_t ctx,
- const gss_buffer_t innerToken,
- enum gss_eap_token_type tokenType,
- gss_buffer_t outputToken)
+gssEapContextTime(OM_uint32 *minor,
+ gss_ctx_id_t context_handle,
+ OM_uint32 *time_rec)
{
- unsigned char *p;
+ *minor = 0;
- outputToken->length = tokenSize(ctx->mechanismUsed, innerToken->length);
- outputToken->value = GSSEAP_MALLOC(outputToken->length);
- if (outputToken->value == NULL) {
- *minor = ENOMEM;
- return GSS_S_FAILURE;
- }
+ if (context_handle->expiryTime == 0) {
+ *time_rec = GSS_C_INDEFINITE;
+ } else {
+ time_t now, lifetime;
- p = (unsigned char *)outputToken->value;
- makeTokenHeader(ctx->mechanismUsed, innerToken->length, &p, tokenType);
- memcpy(p, innerToken->value, innerToken->length);
+ time(&now);
+ lifetime = context_handle->expiryTime - now;
+ if (lifetime <= 0) {
+ *time_rec = 0;
+ return GSS_S_CONTEXT_EXPIRED;
+ }
+ *time_rec = lifetime;
+ }
- *minor = 0;
return GSS_S_COMPLETE;
}
OM_uint32
-gssEapVerifyToken(OM_uint32 *minor,
- gss_ctx_id_t ctx,
- const gss_buffer_t inputToken,
- enum gss_eap_token_type *actualToken,
- gss_buffer_t innerInputToken)
+gssEapGetConversationMIC(OM_uint32 *minor,
+ gss_ctx_id_t ctx,
+ gss_buffer_t convMIC)
{
OM_uint32 major;
- size_t bodySize;
- unsigned char *p = (unsigned char *)inputToken->value;
- gss_OID_desc oidBuf;
- gss_OID oid;
+ gss_iov_buffer_desc iov[2];
- if (ctx->mechanismUsed != GSS_C_NO_OID) {
- oid = ctx->mechanismUsed;
- } else {
- oidBuf.elements = NULL;
- oidBuf.length = 0;
- oid = &oidBuf;
- }
+ iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;
+ iov[0].buffer = ctx->conversation;
- major = verifyTokenHeader(minor, oid, &bodySize, &p,
- inputToken->length, actualToken);
+ iov[1].type = GSS_IOV_BUFFER_TYPE_HEADER | GSS_IOV_BUFFER_FLAG_ALLOCATE;
+ iov[1].buffer.length = 0;
+ iov[1].buffer.value = NULL;
+
+ major = gssEapWrapOrGetMIC(minor, ctx, FALSE, NULL, iov, 2, TOK_TYPE_MIC);
if (GSS_ERROR(major))
return major;
- if (ctx->mechanismUsed == GSS_C_NO_OID) {
- major = gssEapCanonicalizeOid(minor, oid, 0, &ctx->mechanismUsed);
- if (GSS_ERROR(major))
- return major;
- }
-
- innerInputToken->length = bodySize;
- innerInputToken->value = p;
+ *convMIC = iov[1].buffer;
*minor = 0;
return GSS_S_COMPLETE;
}
OM_uint32
-gssEapContextTime(OM_uint32 *minor,
- gss_ctx_id_t context_handle,
- OM_uint32 *time_rec)
+gssEapVerifyConversationMIC(OM_uint32 *minor,
+ gss_ctx_id_t ctx,
+ const gss_buffer_t convMIC)
{
- *minor = 0;
+ OM_uint32 major;
+ gss_iov_buffer_desc iov[3];
+ int confState;
+ size_t tokenHeaderLength;
- if (context_handle->expiryTime == 0) {
- *time_rec = GSS_C_INDEFINITE;
- } else {
- time_t now, lifetime;
+ if (convMIC == GSS_C_NO_BUFFER || convMIC->length < 16) {
+ *minor = GSSEAP_TOK_TRUNC;
+ return GSS_S_BAD_SIG;
+ }
- time(&now);
- lifetime = context_handle->expiryTime - now;
- if (lifetime <= 0) {
- *time_rec = 0;
- return GSS_S_CONTEXT_EXPIRED;
- }
- *time_rec = lifetime;
+ iov[0].type = GSS_IOV_BUFFER_TYPE_DATA;
+ iov[0].buffer = ctx->conversation;
+
+ /*
+ * The conversation state already includes the MIC and its
+ * TLV header, as well as a header for emiting a subsequent
+ * token. These should not be included as input to verifyMIC.
+ */
+ tokenHeaderLength = ITOK_HEADER_LENGTH + convMIC->length
+ + 2 + ctx->mechanismUsed->length + 2;
+ assert(ctx->conversation.length >= tokenHeaderLength);
+ iov[0].buffer.length -= tokenHeaderLength;
+
+ iov[1].type = GSS_IOV_BUFFER_TYPE_HEADER;
+ iov[1].buffer.length = 16;
+ iov[1].buffer.value = convMIC->value;
+
+ iov[2].type = GSS_IOV_BUFFER_TYPE_TRAILER;
+ iov[2].buffer.length = convMIC->length - 16;
+ iov[2].buffer.value = (unsigned char *)convMIC->value + 16;
+
+ major = gssEapUnwrapOrVerifyMIC(minor, ctx, &confState, NULL,
+ iov, 3, TOK_TYPE_MIC);
+
+
+ return major;
+}
+
+OM_uint32
+gssEapMakeTokenChannelBindings(OM_uint32 *minor,
+ gss_ctx_id_t ctx,
+ gss_channel_bindings_t userChanBindings,
+ gss_buffer_t inputToken,
+ gss_channel_bindings_t wireChanBindings)
+{
+ gss_buffer_t wireData = &wireChanBindings->application_data;
+ unsigned char *p;
+ size_t tokenHeaderLength = 0;
+
+ memset(wireChanBindings, 0, sizeof(*wireChanBindings));
+
+ if (!CTX_IS_INITIATOR(ctx)) {
+ assert(inputToken != GSS_C_NO_BUFFER);
+
+ tokenHeaderLength = ITOK_HEADER_LENGTH + inputToken->length +
+ 2 + ctx->mechanismUsed->length + 2;
+ assert(ctx->conversation.length >= tokenHeaderLength);
}
+ wireData->length = ctx->conversation.length - tokenHeaderLength;
+
+ if (userChanBindings != GSS_C_NO_CHANNEL_BINDINGS)
+ wireData->length += userChanBindings->application_data.length;
+
+ wireData->value = GSSEAP_MALLOC(wireData->length);
+ if (wireData->value == NULL) {
+ *minor = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+
+ p = (unsigned char *)wireData->value;
+
+ memcpy(p, ctx->conversation.value, ctx->conversation.length - tokenHeaderLength);
+ p += ctx->conversation.length - tokenHeaderLength;
+
+ if (userChanBindings != GSS_C_NO_CHANNEL_BINDINGS) {
+ memcpy(p, userChanBindings->application_data.value,
+ userChanBindings->application_data.length);
+ p += userChanBindings->application_data.length;
+ }
+
+ *minor = 0;
return GSS_S_COMPLETE;
}
projects / moonshot.git / commitdiff