binman: ftest: Add test for u_boot_spl_pubkey_dtb

Add test for u_boot_spl_pubkey_dtb. The test adds a public key to the
dtb and checks if the required nodes will be added to the images dtb.

Signed-off-by: Lukas Funke <lukas.funke@weidmueller.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

tools/binman/ftest.py

@@ -653,6 +653,16 @@ class TestFunctional(unittest.TestCase):
         TestFunctional._MakeInputFile('vpl/u-boot-vpl',
             tools.read_file(cls.ElfTestFile(src_fname)))
 
+    @classmethod
+    def _SetupPmuFwlElf(cls, src_fname='bss_data'):
+        """Set up an ELF file with a '_dt_ucode_base_size' symbol
+
+        Args:
+            Filename of ELF file to use as VPL
+        """
+        TestFunctional._MakeInputFile('pmu-firmware.elf',
+            tools.read_file(cls.ElfTestFile(src_fname)))
+
     @classmethod
     def _SetupDescriptor(cls):
         with open(cls.TestFile('descriptor.bin'), 'rb') as fd:
@@ -7054,5 +7064,28 @@ fdt         fdtmap                Extract the devicetree blob from the fdtmap
         self.assertNotIn('key-source', node.props)
 
 
+    def testSplPubkeyDtb(self):
+         """Test u_boot_spl_pubkey_dtb etype"""
+         data = tools.read_file(self.TestFile("key.pem"))
+         self._MakeInputFile("key.crt", data)
+         self._DoReadFileRealDtb('306_spl_pubkey_dtb.dts')
+         image = control.images['image']
+         entries = image.GetEntries()
+         dtb_entry = entries['u-boot-spl-pubkey-dtb']
+         dtb_data = dtb_entry.GetData()
+         dtb = fdt.Fdt.FromData(dtb_data)
+         dtb.Scan()
+
+         signature_node = dtb.GetNode('/signature')
+         self.assertIsNotNone(signature_node)
+         key_node = signature_node.FindNode("key-key")
+         self.assertIsNotNone(key_node)
+         self.assertEqual(fdt_util.GetString(key_node, "required"),
+                          "conf")
+         self.assertEqual(fdt_util.GetString(key_node, "algo"),
+                          "sha384,rsa4096")
+         self.assertEqual(fdt_util.GetString(key_node, "key-name-hint"),
+                          "key")
+
 if __name__ == "__main__":
     unittest.main()

tools/binman/test/306_spl_pubkey_dtb.dts

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	binman {
+		u-boot-spl-pubkey-dtb {
+			algo = "sha384,rsa4096";
+			required = "conf";
+			key-name-hint = "key";
+		};
+	};
+};