diff --git a/meta-phosphor/recipes-phosphor/flash/phosphor-image-signing.bb b/meta-phosphor/recipes-phosphor/flash/phosphor-image-signing.bb
index cfacfbe..09080bc 100644
--- a/meta-phosphor/recipes-phosphor/flash/phosphor-image-signing.bb
+++ b/meta-phosphor/recipes-phosphor/flash/phosphor-image-signing.bb
@@ -6,6 +6,8 @@
 DEPENDS += "${@oe.utils.conditional('INSECURE_KEY', 'True', 'phosphor-insecure-signing-key-native', '', d)}"
 PR = "r1"
 
+SIGNING_PUBLIC_KEY ?= ""
+SIGNING_PUBLIC_KEY_TYPE = "${@os.path.splitext(os.path.basename('${SIGNING_PUBLIC_KEY}'))[0]}"
 SIGNING_KEY ?= "${STAGING_DIR_NATIVE}${datadir}/OpenBMC.priv"
 SIGNING_KEY_TYPE = "${@os.path.splitext(os.path.basename('${SIGNING_KEY}'))[0]}"
 SYSROOT_DIRS:append = " ${sysconfdir}"
@@ -13,9 +15,26 @@
 inherit allarch
 
 do_install() {
-        openssl pkey -in "${SIGNING_KEY}" -pubout -out ${WORKDIR}/publickey
+        signing_key="${SIGNING_KEY}"
+        if [ "${INSECURE_KEY}" == "True" ] && [ -n "${SIGNING_PUBLIC_KEY}" ]; then
+            echo "Using SIGNING_PUBLIC_KEY"
+            signing_key=""
+        fi
+        if [ -n "${signing_key}" ] && [ -n "${SIGNING_PUBLIC_KEY}" ]; then
+            echo "Both SIGNING_KEY and SIGNING_PUBLIC_KEY are defined, expecting only one"
+            exit 1
+        fi
+        if [ -n "${signing_key}" ]; then
+            openssl pkey -in "${signing_key}" -pubout -out ${WORKDIR}/publickey
+            idir="${D}${sysconfdir}/activationdata/${SIGNING_KEY_TYPE}"
+        elif [ -n "${SIGNING_PUBLIC_KEY}" ]; then
+            cp "${SIGNING_PUBLIC_KEY}" ${WORKDIR}/publickey
+            idir="${D}${sysconfdir}/activationdata/${SIGNING_PUBLIC_KEY_TYPE}"
+        else
+            echo "No SIGNING_KEY or SIGNING_PUBLIC_KEY defined, expecting one"
+            exit 1
+        fi
         echo HashType=RSA-SHA256 > "${WORKDIR}/hashfunc"
-        idir="${D}${sysconfdir}/activationdata/${SIGNING_KEY_TYPE}"
         install -d ${idir}
         install -m 644 ${WORKDIR}/publickey ${idir}
         install -m 644 ${WORKDIR}/hashfunc ${idir}