Add support for building sim AE

Fix psw/ae/buildenv.mk so that it uses the sim runtime libraries when
$(SGX_MODE) is not set to "HW". This allows the PCE and QE code paths
to be tested on platforms that do not support flexible launch control.

Add a rule to automatically sign the sim PCE with a test key.

Signed-off-by: Seth Moore <sethmo@google.com>

Author: sethmoo

psw/ae/buildenv.mk

@@ -31,6 +31,8 @@
 
 ENV := $(strip $(wildcard $(TOP_DIR)/buildenv.mk))
 
+SGX_MODE ?= HW
+
 ifeq ($(ENV),)
     $(error "Can't find $(TOP_DIR)/buildenv.mk")
 endif
@@ -49,8 +51,13 @@ EDLFILE  := $(wildcard *.edl)
 
 EPID_SDK_DIR := $(LINUX_EXTERNAL_DIR)/epid-sdk
 
-URTSLIB := -lsgx_urts
-TRTSLIB := -lsgx_trts
+ifneq ($(SGX_MODE), HW)
+	URTSLIB := -lsgx_urts_sim
+	TRTSLIB := -lsgx_trts_sim
+else
+	URTSLIB := -lsgx_urts
+	TRTSLIB := -lsgx_trts
+endif
 EXTERNAL_LIB := -lsgx_tservice
 
 EXTERNAL_LIB += -lsgx_tstdc -lsgx_tcrypto -lsgx_tcxx

psw/ae/pce/Makefile

@@ -50,8 +50,12 @@ OBJ := $(SRC:.cpp=.o)
 OBJS := $(sort $(OBJ) version.o)
 
 .PHONY: all
-all: $(SONAME) 
+all: $(SONAME)
 
+ifneq ($(SGX_MODE), HW)
+all: pce_sim_private_key.pem
+	$(SGXSIGN) sign -key pce_sim_private_key.pem -enclave $(SONAME) -out libsgx_$(AENAME).signed.so -config $(CONFIG)
+endif
 
 $(SONAME): $(OBJS)
 	$(CXX) $(CXXFLAGS) -o $@  $(OBJS)  -nostdlib -nodefaultlibs -nostartfiles $(LDTFLAGS)

psw/ae/pce/pce_sim_private_key.pem

@@ -0,0 +1,39 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIG4wIBAAKCAYEAzJFHU/1zCXY9zxdowcU81tLWs2t5NK2Yu7tnjzfRGWFkkit0
+UEuYA20xyZj6cIfJ9XdiL2wdLv0My54mEmWqrwc/5PuzrRssFGF8C/j1gqdz6T/y
+YPHVlsXtF4barkUh8mZqQgUw1HBBj/Wm/lqkVocYsUOHlqyX1ioFYcjHIhUAbolr
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+pdOCAKbgtmQRY4r4y+QFtkkQTd0VUJgc12jnls7s/YpIryhKxS5/
+-----END RSA PRIVATE KEY-----

psw/ae/pce/pce_sim_public_key.pem

@@ -0,0 +1,11 @@
+-----BEGIN PUBLIC KEY-----
+MIIBoDANBgkqhkiG9w0BAQEFAAOCAY0AMIIBiAKCAYEAzJFHU/1zCXY9zxdowcU8
+1tLWs2t5NK2Yu7tnjzfRGWFkkit0UEuYA20xyZj6cIfJ9XdiL2wdLv0My54mEmWq
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+l+R+/pn5kGwDKpnmfW6rwnVYu+yZ49TzD/OuLwq6lC7pAgED
+-----END PUBLIC KEY-----