From 6196f93aaca970f23276407af0812179c51a29ea Mon Sep 17 00:00:00 2001
From: Luke Howard <lukeh@padl.com>
Date: Thu, 17 Nov 2011 20:34:12 +1100
Subject: [PATCH] Allow certificate/private key to contain binary data

---
 moonshot/mech_eap/gssapiP_eap.h      |  6 ++++++
 moonshot/mech_eap/init_sec_context.c | 36 +++++++++++++++++++++++++++++++-----
 2 files changed, 37 insertions(+), 5 deletions(-)

diff --git a/moonshot/mech_eap/gssapiP_eap.h b/moonshot/mech_eap/gssapiP_eap.h
index c763fbd..eb7e7db 100644
--- a/moonshot/mech_eap/gssapiP_eap.h
+++ b/moonshot/mech_eap/gssapiP_eap.h
@@ -151,6 +151,7 @@ struct gss_name_struct
 #define CRED_FLAG_RESOLVED                  0x00100000
 #define CRED_FLAG_TARGET                    0x00200000
 #define CRED_FLAG_CERTIFICATE               0x00400000
+#define CRED_FLAG_CONFIG_BLOB               0x00800000
 #define CRED_FLAG_PUBLIC_MASK               0x0000FFFF
 
 #ifdef HAVE_HEIMDAL_VERSION
@@ -198,11 +199,16 @@ struct gss_cred_id_struct
 #define CTX_FLAG_EAP_ALT_REJECT             0x01000000
 #define CTX_FLAG_EAP_MASK                   0xFFFF0000
 
+#define CONFIG_BLOB_CLIENT_CERT             0
+#define CONFIG_BLOB_PRIVATE_KEY             1
+#define CONFIG_BLOB_MAX                     2
+
 struct gss_eap_initiator_ctx {
     unsigned int idleWhile;
     struct eap_peer_config eapPeerConfig;
     struct eap_sm *eap;
     struct wpabuf reqData;
+    struct wpa_config_blob configBlobs[CONFIG_BLOB_MAX];
 };
 
 #ifdef GSSEAP_ENABLE_ACCEPTOR
diff --git a/moonshot/mech_eap/init_sec_context.c b/moonshot/mech_eap/init_sec_context.c
index 8a877fd..a67d381 100644
--- a/moonshot/mech_eap/init_sec_context.c
+++ b/moonshot/mech_eap/init_sec_context.c
@@ -167,10 +167,20 @@ peerSetConfigBlob(void *ctx GSSEAP_UNUSED,
 }
 
 static const struct wpa_config_blob *
-peerGetConfigBlob(void *ctx GSSEAP_UNUSED,
-                  const char *name GSSEAP_UNUSED)
+peerGetConfigBlob(void *ctx,
+                  const char *name)
 {
-    return NULL;
+    gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
+    size_t index;
+
+    if (strcmp(name, "client-cert") == 0)
+        index = CONFIG_BLOB_CLIENT_CERT;
+    else if (strcmp(name, "private-key") == 0)
+        index = CONFIG_BLOB_PRIVATE_KEY;
+    else
+        return NULL;
+
+    return &gssCtx->initiatorCtx.configBlobs[index];
 }
 
 static void
@@ -200,6 +210,7 @@ peerConfigInit(OM_uint32 *minor, gss_ctx_id_t ctx)
     OM_uint32 major;
     krb5_context krbContext;
     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
+    struct wpa_config_blob *configBlobs = ctx->initiatorCtx.configBlobs;
     gss_buffer_desc identity = GSS_C_EMPTY_BUFFER;
     gss_buffer_desc realm = GSS_C_EMPTY_BUFFER;
     gss_cred_id_t cred = ctx->cred;
@@ -261,8 +272,23 @@ peerConfigInit(OM_uint32 *minor, gss_ctx_id_t ctx)
     eapPeerConfig->altsubject_match = (unsigned char *)cred->subjectAltNameConstraint.value;
 
     if (cred->flags & CRED_FLAG_CERTIFICATE) {
-        eapPeerConfig->client_cert = (unsigned char *)cred->clientCertificate.value;
-        eapPeerConfig->private_key = (unsigned char *)cred->privateKey.value;
+        /*
+         * CRED_FLAG_CONFIG_BLOB is an internal flag which will be used in the
+         * future to directly pass certificate and private key data to the
+         * EAP implementation, rather than an indirected string pointer.
+         */
+        if (cred->flags & CRED_FLAG_CONFIG_BLOB) {
+            eapPeerConfig->client_cert = (unsigned char *)"blob://client-cert";
+            configBlobs[CONFIG_BLOB_CLIENT_CERT].data = cred->clientCertificate.value;
+            configBlobs[CONFIG_BLOB_CLIENT_CERT].len  = cred->clientCertificate.length;
+
+            eapPeerConfig->client_cert = (unsigned char *)"blob://private-key";
+            configBlobs[CONFIG_BLOB_PRIVATE_KEY].data = cred->clientCertificate.value;
+            configBlobs[CONFIG_BLOB_PRIVATE_KEY].len  = cred->privateKey.length;
+        } else {
+            eapPeerConfig->client_cert = (unsigned char *)cred->clientCertificate.value;
+            eapPeerConfig->private_key = (unsigned char *)cred->privateKey.value;
+        }
         eapPeerConfig->private_key_passwd = (unsigned char *)cred->password.value;
     }
 
-- 
2.1.4