meta-integrity: implement the system trusted cert and IMA trusted cert

Signed-off-by: Lans Zhang <jia.zhang@windriver.com>

meta-integrity/recipes-kernel/linux/linux-yocto-integrity.inc

@@ -7,14 +7,15 @@ DEPENDS += "${@'key-store openssl-native' if d.getVar('IMA_ENABLED', True) == '1
 # in initramfs only. So we don't add it to RDEPENDS_${PN} here.
 
 SRC_URI += "\
-    ${@'file://ima.scc file://ima.cfg file://integrity.scc file://integrity.cfg' if d.getVar('IMA_ENABLED', True) == '1' else ''} \
+    ${@'file://ima.scc file://ima.cfg file://integrity.scc file://integrity.cfg' \
+       if d.getVar('IMA_ENABLED', True) == '1' else ''} \
 "
 
-do_configure_append() {
-    cert="${STAGING_DIR_TARGET}${sysconfdir}/keys/system_trusted_key.der"
+do_configure_prepend() {
+    cert="${STAGING_DIR_TARGET}${sysconfdir}/keys/system_trusted_key.crt"
 
     if [ -f "$cert" ]; then
-        install -m 0644 "$cert" "${B}/system_trusted_cert.x509"
+        install -m 0644 "$cert" "${B}"
     else
         true
     fi

meta-integrity/recipes-kernel/linux/linux-yocto/integrity.cfg

@@ -5,3 +5,7 @@ CONFIG_INTEGRITY_AUDIT=y
 CONFIG_INTEGRITY_SIGNATURE=y
 CONFIG_INTEGRITY_ASYMMETRIC_KEYS=y
 CONFIG_SYSTEM_TRUSTED_KEYRING=y
+CONFIG_SYSTEM_TRUSTED_KEYS="system_trusted_key.crt"
+CONFIG_SYSTEM_EXTRA_CERTIFICATE=y
+CONFIG_SYSTEM_EXTRA_CERTIFICATE_SIZE=4096
+CONFIG_SECONDARY_TRUSTED_KEYRING=y

meta-signing-key/classes/user-key-store.bbclass

@@ -161,8 +161,8 @@ def check_system_trusted_keys(d):
         vprint("%s.key is unavailable" % _, d)
         return False
 
-    if not os.path.exists(dir + _ + '.der'):
-        vprint("%s.der is unavailable" % _, d)
+    if not os.path.exists(dir + _ + '.crt'):
+        vprint("%s.crt is unavailable" % _, d)
         return False
 
 # Convert the PEM to DER format.

meta-signing-key/files/ima_keys/x509_ima.key

@@ -1,28 +1,28 @@
 -----BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQC1zbVTvepaUFh4
-NA5xCGNJSmslWY+pIAOYkDdpRjvyaPoewwBYW3TJ/+9oGqRMfq/HPf3VUKQto2EX
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+V0o9jJM38My5DTfhVZNpejKk9g==
 -----END PRIVATE KEY-----

meta-signing-key/files/system_trusted_keys/system_trusted_key.crt

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDUzCCAjugAwIBAgIJAIBSPsg9GPovMA0GCSqGSIb3DQEBCwUAMEAxPjA8BgNV
+BAMMNVN5c3RlbSBUcnVzdGVkIENlcnRpZmljYXRlIGZvciBqemhhbmcwQHBlay1q
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+eGb25wL3YyovnOZ6oUu3pPMjjmIERi1NeIVMZgoPHuYuIu5eA+7e
+-----END CERTIFICATE-----

meta-signing-key/files/system_trusted_keys/system_trusted_key.key

@@ -1,28 +1,28 @@
 -----BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDIYw6V76JkHaSG
-1mswZ7g9Ed6TprtZpcSNrqvLnMHxs7C7peUfcrXhSu1Iz220B1kcHzw8QgsRdOCa
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+hGDKUC0HjCAGOTDqnDJpk2g=
 -----END PRIVATE KEY-----

meta-signing-key/recipes-support/key-store/key-store_0.1.bb

@@ -1,7 +1,8 @@
 DESCRIPTION = "Key store for key installation"
 LICENSE = "MIT"
-LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=4d92cd373abda3937c2bc47fbc49d690 \
-                    file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+LIC_FILES_CHKSUM = "\
+    file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420 \
+"
 
 inherit user-key-store
 
@@ -9,17 +10,17 @@ S = "${WORKDIR}"
 
 ALLOW_EMPTY_${PN} = "1"
 
-PACKAGES =+ " \
-             ${PN}-system-trusted-cert \
-             ${PN}-ima-cert \
-            "
+PACKAGES =+ "\
+    ${PN}-system-trusted-cert \
+    ${PN}-ima-cert \
+"
 
 # Note any private key is not available if user key signing model used.
-PACKAGES_DYNAMIC += " \
-                     ${PN}-ima-privkey \
-                     ${PN}-system-trusted-privkey \
-                     ${PN}-rpm-pubkey \
-                    "
+PACKAGES_DYNAMIC += "\
+    ${PN}-ima-privkey \
+    ${PN}-system-trusted-privkey \
+    ${PN}-rpm-pubkey \
+"
 
 KEY_DIR = "${sysconfdir}/keys"
 # For RPM verification
@@ -32,14 +33,10 @@ SYSTEM_PRIV_KEY = "${KEY_DIR}/system_trusted_key.key"
 IMA_PRIV_KEY = "${KEY_DIR}/privkey_evm.crt"
 
 # For ${PN}-system-trusted-cert
-SYSTEM_CERT = "${KEY_DIR}/system_trusted_key.der"
-FILES_${PN}-system-trusted-cert = "${SYSTEM_CERT}"
-CONFFILES_${PN}-system-trusted-cert = "${SYSTEM_CERT}"
+SYSTEM_CERT = "${KEY_DIR}/system_trusted_key.crt"
 
 # For ${PN}-ima-cert
 IMA_CERT = "${KEY_DIR}/x509_evm.der"
-FILES_${PN}-ima-cert = "${IMA_CERT}"
-CONFFILES_${PN}-ima-cert = "${IMA_CERT}"
 
 python () {
     if uks_signing_model(d) != "sample":
@@ -83,7 +80,7 @@ do_install() {
     install -d "${D}${KEY_DIR}"
 
     key_dir="${@uks_system_trusted_keys_dir(d)}"
-    install -m 0644 "$key_dir/system_trusted_key.der" "${D}${SYSTEM_CERT}"
+    install -m 0644 "$key_dir/system_trusted_key.crt" "${D}${SYSTEM_CERT}"
 
     if [ "${@uks_signing_model(d)}" = "sample" ]; then
         install -m 0400 "$key_dir/system_trusted_key.key" "${D}${SYSTEM_PRIV_KEY}"
@@ -120,3 +117,9 @@ pkg_postinst_${PN}-rpm-pubkey() {
         done
     fi
 }
+
+FILES_${PN}-system-trusted-cert = "${SYSTEM_CERT}"
+CONFFILES_${PN}-system-trusted-cert = "${SYSTEM_CERT}"
+
+FILES_${PN}-ima-cert = "${IMA_CERT}"
+CONFFILES_${PN}-ima-cert = "${IMA_CERT}"

meta-signing-key/scripts/create-user-key-store.sh

@@ -1,6 +1,10 @@
 #!/bin/bash
 
-KEYS_DIR="`pwd`/user-keys"
+_S="${BASH_SOURCE[0]}"
+_D=`dirname "$_S"`
+ROOT_DIR="`cd "$_D" && pwd`"
+
+KEYS_DIR="$ROOT_DIR/user-keys"
 
 function show_help()
 {
@@ -88,7 +92,7 @@ ca_sign() {
             -CAform "$ca_cert_form" \
             -CAkey "$ca_key_dir/$ca_key_name.key" \
             -set_serial 1 -days 3650 \
-            -extfile openssl.cnf -extensions v3_req \
+            -extfile "$ROOT_DIR/openssl.cnf" -extensions v3_req \
             -out "$key_dir/$key_name.crt"
 
         rm -f "$key_dir/$key_name.csr"
@@ -126,9 +130,6 @@ create_system_user_key() {
 
     ca_sign "$key_dir" system_trusted_key "$key_dir" system_trusted_key \
         "/CN=System Trusted Certificate for $USER@`hostname`/"
-
-    pem2der "$key_dir/system_trusted_key.crt"
-    rm -f "$key_dir/system_trusted_key.crt"
 }
 
 create_ima_user_key() {

meta-signing-key/scripts/openssl.cnf

@@ -1,2 +1,3 @@
 [v3_req]
+subjectKeyIdentifier=hash
 authorityKeyIdentifier=keyid:always