X-Git-Url: http://www.project-moonshot.org/gitweb/?a=blobdiff_plain;f=init_sec_context.c;h=119eb4f30b6a261a9be770d4335637d39ed5b747;hb=d4fe7ce93304facaf069792c347b01b25ab765ae;hp=cb20f208c6cd1d94ebcd7415a278ffe430b8c325;hpb=c11d67f46f001b7f0a664e3c995a8aa7a4eb960c;p=mech_eap.orig

diff --git a/init_sec_context.c b/init_sec_context.c
index cb20f20..119eb4f 100644
--- a/init_sec_context.c
+++ b/init_sec_context.c
@@ -70,6 +70,14 @@ policyVariableToFlag(enum eapol_bool_var variable)
     return flag;
 }
 
+static struct eap_peer_config *
+peerGetConfig(void *ctx)
+{
+    gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
+
+    return &gssCtx->initiatorCtx.eapPeerConfig;
+}
+
 static Boolean
 peerGetBool(void *data, enum eapol_bool_var variable)
 {
@@ -102,7 +110,7 @@ peerSetBool(void *data, enum eapol_bool_var variable,
         ctx->flags &= ~(flag);
 }
 
-static int
+static unsigned int
 peerGetInt(void *data, enum eapol_int_var variable)
 {
     gss_ctx_id_t ctx = data;
@@ -139,10 +147,310 @@ peerSetInt(void *data, enum eapol_int_var variable,
     }
 }
 
+static struct wpabuf *
+peerGetEapReqData(void *ctx)
+{
+    gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
+
+    return &gssCtx->initiatorCtx.reqData;
+}
+
+static void
+peerSetConfigBlob(void *ctx, struct wpa_config_blob *blob)
+{
+}
+
+static const struct wpa_config_blob *
+peerGetConfigBlob(void *ctx, const char *name)
+{
+    return NULL;
+}
+
+static void
+peerNotifyPending(void *ctx)
+{
+}
+
+static struct eapol_callbacks gssEapPolicyCallbacks = {
+    peerGetConfig,
+    peerGetBool,
+    peerSetBool,
+    peerGetInt,
+    peerSetInt,
+    peerGetEapReqData,
+    peerSetConfigBlob,
+    peerGetConfigBlob,
+    peerNotifyPending,
+};
+
+static OM_uint32
+peerConfigInit(OM_uint32 *minor,
+               gss_cred_id_t cred,
+               gss_ctx_id_t ctx,
+               int loadConfig)
+{
+    krb5_context krbContext;
+    struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
+    krb5_error_code code;
+    char *identity;
+
+    GSSEAP_KRB_INIT(&krbContext);
+
+    if (loadConfig) {
+    }
+
+    code = krb5_unparse_name(krbContext, cred->name->krbPrincipal, &identity);
+    if (code != 0) {
+        *minor = code;
+        return GSS_S_FAILURE;
+    }
+
+    eapPeerConfig->identity = (unsigned char *)identity;
+    eapPeerConfig->identity_len = strlen(identity);
+    eapPeerConfig->password = (unsigned char *)cred->password.value;
+    eapPeerConfig->password_len = cred->password.length;
+
+    return GSS_S_COMPLETE;
+}
+
+static OM_uint32
+peerConfigFree(OM_uint32 *minor,
+               gss_ctx_id_t ctx)
+{
+    krb5_context krbContext;
+    struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
+
+    GSSEAP_KRB_INIT(&krbContext);
+
+    krb5_free_unparsed_name(krbContext, (char *)eapPeerConfig->identity);
+
+    return GSS_S_COMPLETE;
+}
+
+static OM_uint32
+peerDeriveKey(OM_uint32 *minor,
+              gss_ctx_id_t ctx)
+{
+    OM_uint32 major;
+    const unsigned char *key;
+    size_t keyLength;
+    krb5_context krbContext;
+
+    GSSEAP_KRB_INIT(&krbContext);
+
+    /* Cache encryption type derived from selected mechanism OID */
+    major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
+    if (GSS_ERROR(major))
+        return major;
+
+    if (ctx->encryptionType != ENCTYPE_NULL &&
+        eap_key_available(ctx->initiatorCtx.eap)) {
+        key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
+
+        major = gssEapDeriveRFC3961Key(minor, key, keyLength,
+                                       ctx->encryptionType, &ctx->rfc3961Key);
+        if (GSS_ERROR(major))
+            return major;
+    } else {
+        /*
+         * draft-howlett-eap-gss says that integrity/confidentialty should
+         * always be advertised as available, but if we have no keying
+         * material it seems confusing to the caller to advertise this.
+         */
+        ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
+    }
+
+    return GSS_S_COMPLETE;
+}
+
+static OM_uint32
+eapGssSmInitAuthenticate(OM_uint32 *minor,
+                         gss_cred_id_t cred,
+                         gss_ctx_id_t ctx,
+                         gss_name_t target,
+                         gss_OID mech,
+                         OM_uint32 reqFlags,
+                         OM_uint32 timeReq,
+                         gss_channel_bindings_t chanBindings,
+                         gss_buffer_t inputToken,
+                         gss_buffer_t outputToken)
+{
+    OM_uint32 major, tmpMinor;
+    time_t now;
+    int initialContextToken = 0, code;
+
+    initialContextToken = (inputToken == GSS_C_NO_BUFFER ||
+                           inputToken->length == 0);
+
+    major = peerConfigInit(minor, cred, ctx, initialContextToken);
+    if (GSS_ERROR(major))
+        goto cleanup;
+
+    if (initialContextToken) {
+        ctx->flags |= CTX_FLAG_EAP_PORT_ENABLED;
+
+        ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
+                                                 &gssEapPolicyCallbacks,
+                                                 ctx,
+                                                 &ctx->initiatorCtx.eapConfig);
+
+        time(&now);
+        if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
+            ctx->expiryTime = 0;
+        else
+            ctx->expiryTime = now + timeReq;
+
+        major = gss_duplicate_name(minor, cred->name, &ctx->initiatorName);
+        if (GSS_ERROR(major))
+            goto cleanup;
+
+        major = gss_duplicate_name(minor, target, &ctx->acceptorName);
+        if (GSS_ERROR(major))
+            goto cleanup;
+
+        if (mech == GSS_C_NULL_OID || oidEqual(mech, GSS_EAP_MECHANISM)) {
+            major = gssEapDefaultMech(minor, &ctx->mechanismUsed);
+        } else if (gssEapIsConcreteMechanismOid(mech)) {
+            if (!gssEapInternalizeOid(mech, &ctx->mechanismUsed))
+                major = duplicateOid(minor, mech, &ctx->mechanismUsed);
+        } else {
+            major = GSS_S_BAD_MECH;
+        }
+        if (GSS_ERROR(major))
+            goto cleanup;
+    }
+
+    wpabuf_set(&ctx->initiatorCtx.reqData,
+               inputToken->value, inputToken->length);
+
+    code = eap_peer_sm_step(ctx->initiatorCtx.eap);
+
+    if (ctx->flags & CTX_FLAG_EAP_RESP) {
+        struct wpabuf *resp;
+        gss_buffer_desc buf;
+
+        ctx->flags &= ~(CTX_FLAG_EAP_RESP);
+
+        resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
+
+        if (resp != NULL) {
+            buf.length = wpabuf_len(resp);
+            buf.value = (void *)wpabuf_head(resp);
+
+            major = duplicateBuffer(minor, &buf, outputToken);
+            if (GSS_ERROR(major))
+                goto cleanup;
+
+            major = GSS_S_CONTINUE_NEEDED;
+        }
+    }
+
+    if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
+        major = peerDeriveKey(minor, ctx);
+        if (GSS_ERROR(major))
+            goto cleanup;
+
+        ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
+        ctx->state = EAP_STATE_ESTABLISHED;
+        major = GSS_S_COMPLETE;
+    } else if ((ctx->flags & CTX_FLAG_EAP_FAIL) || code == 0) {
+        major = GSS_S_FAILURE;
+    }
+
+cleanup:
+    wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
+    peerConfigFree(&tmpMinor, ctx);
+
+    return major;
+}
+
+static OM_uint32
+eapGssSmInitKeyTransport(OM_uint32 *minor,
+                         gss_cred_id_t cred,
+                         gss_ctx_id_t ctx,
+                         gss_name_t target,
+                         gss_OID mech,
+                         OM_uint32 reqFlags,
+                         OM_uint32 timeReq,
+                         gss_channel_bindings_t chanBindings,
+                         gss_buffer_t inputToken,
+                         gss_buffer_t outputToken)
+{
+    GSSEAP_NOT_IMPLEMENTED;
+}
+
+static OM_uint32
+eapGssSmInitSecureAssoc(OM_uint32 *minor,
+                        gss_cred_id_t cred,
+                        gss_ctx_id_t ctx,
+                        gss_name_t target,
+                        gss_OID mech,
+                        OM_uint32 reqFlags,
+                        OM_uint32 timeReq,
+                        gss_channel_bindings_t chanBindings,
+                        gss_buffer_t inputToken,
+                        gss_buffer_t outputToken)
+{
+    GSSEAP_NOT_IMPLEMENTED;
+}
+
+static OM_uint32
+eapGssSmInitGssChannelBindings(OM_uint32 *minor,
+                               gss_cred_id_t cred,
+                               gss_ctx_id_t ctx,
+                               gss_name_t target,
+                               gss_OID mech,
+                               OM_uint32 reqFlags,
+                               OM_uint32 timeReq,
+                               gss_channel_bindings_t chanBindings,
+                               gss_buffer_t inputToken,
+                               gss_buffer_t outputToken)
+{
+    GSSEAP_NOT_IMPLEMENTED;
+}
+
+static OM_uint32
+eapGssSmInitEstablished(OM_uint32 *minor,
+                        gss_cred_id_t cred,
+                        gss_ctx_id_t ctx,
+                        gss_name_t target,
+                        gss_OID mech,
+                        OM_uint32 reqFlags,
+                        OM_uint32 timeReq,
+                        gss_channel_bindings_t chanBindings,
+                        gss_buffer_t inputToken,
+                        gss_buffer_t outputToken)
+{
+    /* Called with already established context */
+    *minor = EINVAL;
+    return GSS_S_BAD_STATUS;
+}
+
+static struct eap_gss_initiator_sm {
+    enum gss_eap_token_type inputTokenType;
+    enum gss_eap_token_type outputTokenType;
+    OM_uint32 (*processToken)(OM_uint32 *,
+                              gss_cred_id_t,
+                              gss_ctx_id_t,
+                              gss_name_t,
+                              gss_OID,
+                              OM_uint32,
+                              OM_uint32,
+                              gss_channel_bindings_t,
+                              gss_buffer_t,
+                              gss_buffer_t);
+} eapGssInitiatorSm[] = {
+    { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP,  eapGssSmInitAuthenticate        },
+    { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP,  eapGssSmInitKeyTransport        },
+    { TOK_TYPE_EAP_REQ, TOK_TYPE_EAP_RESP,  eapGssSmInitSecureAssoc         },
+    { TOK_TYPE_GSS_CB,  TOK_TYPE_NONE,      eapGssSmInitGssChannelBindings  },
+    { TOK_TYPE_NONE,    TOK_TYPE_NONE,      eapGssSmInitEstablished         },
+};
+
 OM_uint32
 gss_init_sec_context(OM_uint32 *minor,
                      gss_cred_id_t cred,
-                     gss_ctx_id_t *pCtx,
+                     gss_ctx_id_t *context_handle,
                      gss_name_t target_name,
                      gss_OID mech_type,
                      OM_uint32 req_flags,
@@ -154,5 +462,94 @@ gss_init_sec_context(OM_uint32 *minor,
                      OM_uint32 *ret_flags,
                      OM_uint32 *time_rec)
 {
-    GSSEAP_NOT_IMPLEMENTED;
+    OM_uint32 major, tmpMinor;
+    gss_ctx_id_t ctx = *context_handle;
+    struct eap_gss_initiator_sm *sm = NULL;
+    gss_buffer_desc innerInputToken, innerOutputToken;
+
+    *minor = 0;
+
+    innerOutputToken.length = 0;
+    innerOutputToken.value = NULL;
+
+    output_token->length = 0;
+    output_token->value = NULL;
+
+    if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_INITIATE)) {
+        return GSS_S_NO_CRED;
+    }
+
+    if (ctx == GSS_C_NO_CONTEXT) {
+        if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
+            return GSS_S_DEFECTIVE_TOKEN;
+        }
+
+        major = gssEapAllocContext(minor, &ctx);
+        if (GSS_ERROR(major))
+            return major;
+
+        ctx->flags |= CTX_FLAG_INITIATOR;
+
+        *context_handle = ctx;
+    }
+
+    GSSEAP_MUTEX_LOCK(&ctx->mutex);
+
+    sm = &eapGssInitiatorSm[ctx->state];
+
+    if (input_token != GSS_C_NO_BUFFER) {
+        major = gssEapVerifyToken(minor, ctx, input_token,
+                                  sm->inputTokenType, &innerInputToken);
+        if (GSS_ERROR(major))
+            goto cleanup;
+    } else {
+        innerInputToken.length = 0;
+        innerInputToken.value = NULL;
+    }
+
+    /*
+     * Advance through state machine whilst empty tokens are emitted and
+     * the status is not GSS_S_COMPLETE or an error status.
+     */
+    do {
+        major = (sm->processToken)(minor,
+                                   cred,
+                                   ctx,
+                                   target_name,
+                                   mech_type,
+                                   req_flags,
+                                   time_req,
+                                   input_chan_bindings,
+                                   &innerInputToken,
+                                   &innerOutputToken);
+        if (GSS_ERROR(major))
+            goto cleanup;
+    } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
+
+    if (actual_mech_type != NULL) {
+        if (!gssEapInternalizeOid(ctx->mechanismUsed, actual_mech_type))
+            duplicateOid(&tmpMinor, ctx->mechanismUsed, actual_mech_type);
+    }
+    if (innerOutputToken.length != 0) {
+        major = gssEapMakeToken(minor, ctx, &innerOutputToken,
+                                sm->outputTokenType, output_token);
+        if (GSS_ERROR(major))
+            goto cleanup;
+    }
+    if (ret_flags != NULL)
+        *ret_flags = ctx->gssFlags;
+    if (time_rec != NULL)
+        gss_context_time(&tmpMinor, ctx, time_rec);
+
+    assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
+
+cleanup:
+    GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
+
+    if (GSS_ERROR(major))
+        gssEapReleaseContext(&tmpMinor, context_handle);
+
+    gss_release_buffer(&tmpMinor, &innerOutputToken);
+
+    return major;
 }