btool: mkeficapsule: Add a bintool for EFI capsule generation

Add a bintool for generating EFI capsules. This calls the mkeficapsule
tool which generates the capsules.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

tools/binman/btool/mkeficapsule.py

@@ -0,0 +1,101 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright 2023 Linaro Limited
+#
+"""Bintool implementation for mkeficapsule tool
+
+mkeficapsule is a tool used for generating EFI capsules.
+
+The following are the commandline options to be provided
+to the tool
+Usage: mkeficapsule [options] <image blob> <output file>
+Options:
+	-g, --guid <guid string>    guid for image blob type
+	-i, --index <index>         update image index
+	-I, --instance <instance>   update hardware instance
+	-v, --fw-version <version>  firmware version
+	-p, --private-key <privkey file>  private key file
+	-c, --certificate <cert file>     signer's certificate file
+	-m, --monotonic-count <count>     monotonic count
+	-d, --dump_sig              dump signature (*.p7)
+	-A, --fw-accept  firmware accept capsule, requires GUID, no image blob
+	-R, --fw-revert  firmware revert capsule, takes no GUID, no image blob
+	-o, --capoemflag Capsule OEM Flag, an integer between 0x0000 and 0xffff
+	-h, --help                  print a help message
+"""
+
+from binman import bintool
+
+class Bintoolmkeficapsule(bintool.Bintool):
+    """Handles the 'mkeficapsule' tool
+
+    This bintool is used for generating the EFI capsules. The
+    capsule generation parameters can either be specified through
+    commandline, or through a config file.
+    """
+    def __init__(self, name):
+        super().__init__(name, 'mkeficapsule tool for generating capsules')
+
+    def generate_capsule(self, image_index, image_guid, hardware_instance,
+                         payload, output_fname, priv_key, pub_key,
+                         monotonic_count=0, version=0, oemflags=0):
+        """Generate a capsule through commandline-provided parameters
+
+        Args:
+            image_index (int): Unique number for identifying payload image
+            image_guid (str): GUID used for identifying the image
+            hardware_instance (int): Optional unique hardware instance of
+            a device in the system. 0 if not being used
+            payload (str): Path to the input payload image
+            output_fname (str): Path to the output capsule file
+            priv_key (str): Path to the private key
+            pub_key(str): Path to the public key
+            monotonic_count (int): Count used when signing an image
+            version (int): Image version (Optional)
+            oemflags (int): Optional 16 bit OEM flags
+
+        Returns:
+            str: Tool output
+        """
+        args = [
+            f'--index={image_index}',
+            f'--guid={image_guid}',
+            f'--instance={hardware_instance}'
+        ]
+
+        if version:
+            args += [f'--fw-version={version}']
+        if oemflags:
+            args += [f'--capoemflag={oemflags}']
+        if priv_key and pub_key:
+            args += [
+                f'--monotonic-count={monotonic_count}',
+                f'--private-key={priv_key}',
+                f'--certificate={pub_key}'
+            ]
+
+        args += [
+            payload,
+            output_fname
+        ]
+
+        return self.run_cmd(*args)
+
+    def fetch(self, method):
+        """Fetch handler for mkeficapsule
+
+        This builds the tool from source
+
+        Returns:
+            tuple:
+                str: Filename of fetched file to copy to a suitable directory
+                str: Name of temp directory to remove, or None
+        """
+        if method != bintool.FETCH_BUILD:
+            return None
+
+        cmd = ['tools-only_defconfig', 'tools']
+        result = self.build_from_git(
+            'https://source.denx.de/u-boot/u-boot.git',
+            cmd,
+            'tools/mkeficapsule')
+        return result