imx8mprsb3720: Add capsule public key method

Add capsule public key getting method

Signed-off-by: Jun Nie <jun.nie@linaro.org>

2 files changed, 50 insertions, 0 deletions

diff --git a/board/freescale/imx8mp_rsb3720a1/Makefile b/board/freescale/imx8mp_rsb3720a1/Makefile
index c6710124c0..909b985966 100644
--- a/board/freescale/imx8mp_rsb3720a1/Makefile
+++ b/board/freescale/imx8mp_rsb3720a1/Makefile
@@ -22,3 +22,5 @@ obj-y += spl.o
 obj-$(CONFIG_IMX8M_LPDDR4) += lpddr4_timing_rsb3720a1_4G.o
 endif
 endif
+
+obj-$(CONFIG_EFI_CAPSULE_AUTHENTICATE) += capsule.o
diff --git a/board/freescale/imx8mp_rsb3720a1/capsule.c b/board/freescale/imx8mp_rsb3720a1/capsule.c
new file mode 100644
index 0000000000..f1d403501a
--- /dev/null
+++ b/board/freescale/imx8mp_rsb3720a1/capsule.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2020 Linaro Limited
+ */
+
+#include <common.h>
+#include <efi_api.h>
+#include <efi_loader.h>
+#include <env.h>
+#include <fdtdec.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int efi_get_public_key_data(void **pkey, efi_uintn_t *pkey_len)
+{
+	const void *fdt_blob = gd->fdt_blob;
+	const void *blob;
+	const char *cnode_name = "capsule-key";
+	const char *snode_name = "signature";
+	int sig_node;
+	int len;
+
+	sig_node = fdt_subnode_offset(fdt_blob, 0, snode_name);
+	if (sig_node < 0) {
+		EFI_PRINT("Unable to get signature node offset\n");
+		return -FDT_ERR_NOTFOUND;
+	}
+
+	blob = fdt_getprop(fdt_blob, sig_node, cnode_name, &len);
+
+	if (!blob || len < 0) {
+		EFI_PRINT("Unable to get capsule-key value\n");
+		*pkey = NULL;
+		*pkey_len = 0;
+		return -FDT_ERR_NOTFOUND;
+	}
+
+	*pkey = (void *)blob;
+	*pkey_len = len;
+
+	return 0;
+}
+
+bool efi_capsule_auth_enabled(void)
+{
+	return env_get("capsule_authentication_enabled") != NULL ?
+		true : false;
+}