binman: ti-secure: Add support for TI signing

Add support

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>

board/ti/keys/custMpk.pem

@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----

board/ti/keys/ti-degenerate-key.pem

@@ -0,0 +1,10 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIBWwIBAAKBgQDRfrnXQaP0k6vRK/gZ+bDflSU6y1JagGeQ/b+QYuiDz14japog
+8fRSu5WBsAxaSaySAUwS3L9Ppw+hGMecmyIJ494aMfZTtk1g49gU58joduiRnu7e
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+iCrL55cxEM146zMw3AnF
+-----END RSA PRIVATE KEY-----

tools/binman/btool/openssl.py

@@ -74,6 +74,23 @@ def x509_cert(self, cert_fname, input_fname, key_fname, cn, revision,
                 '-sha512']
         return self.run_cmd(*args)
 
+    def x509_cert_custom(self, cert_fname, key_fname, config_fname, sha):
+        """Create a custom certificate
+
+        Args:
+            cert_fname (str): Filename of certificate to create
+            key_fname (str): Filename of .pem file
+            config_fname (str): Filename to write fconfig into
+            sha (int): hash function to use
+
+        Returns:
+            str: Tool output
+        """
+        args = ['req', '-new', '-x509', '-key', key_fname, '-nodes',
+                '-outform', 'DER', '-out', cert_fname, '-config', config_fname,
+                f'-sha{sha}']
+        return self.run_cmd(*args)
+
     def fetch(self, method):
         """Fetch handler for openssl
 

tools/binman/etype/ti_secure.py

@@ -0,0 +1,121 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright 20
+# Written by Neha Malcom Francis <n-francis@ti.com>
+#
+
+# Support for generating x509 certificate to binary for K3 devices
+
+from collections import OrderedDict
+import os
+
+from binman.entry import EntryArg
+from binman.etype.x509_cert import Entry_x509_cert
+
+import hashlib
+
+from dtoc import fdt_util
+from u_boot_pylib  import tools
+
+class Entry_ti_secure(Entry_x509_cert):
+    def __init__(self, section, etype, node):
+        super().__init__(section, etype, node)
+        self.openssl = None
+
+    def ReadNode(self):
+        super().ReadNode()
+        self.key_fname = self.GetEntryArgsOrProps([
+            EntryArg('keyfile', str)], required=True)[0]
+        self.sha = fdt_util.GetInt(self._node, 'sha', 512)
+
+    def GetCertificate(self, required):
+        """Generate certificate for contents of this entry
+
+        Args:
+            required: True if the data must be present, False if it is OK to
+                return None
+
+        Returns:
+            bytes content of the entry, which is the certificate for the
+                provided data
+        """
+        # Join up the data files to be signed
+        input_data = self.GetContents(required)
+        if input_data is None:
+            return None
+
+        uniq = self.GetUniqueName()
+        output_fname = tools.get_output_filename('cert.%s' % uniq)
+        input_fname = tools.get_output_filename('input.%s' % uniq)
+        config_fname = tools.get_output_filename('config.%s' % uniq)
+        tools.write_file(input_fname, input_data)
+
+        indata = tools.read_file(input_fname)
+        hashval = hashlib.sha512(indata).hexdigest()
+        imagesize = len(indata)
+
+        swrev = 1
+
+        with open(config_fname, 'w', encoding='utf-8') as outf:
+            print(f'''
+[ req ]
+distinguished_name     = req_distinguished_name
+x509_extensions        = v3_ca
+prompt                 = no
+dirstring_type         = nobmp
+
+[ req_distinguished_name ]
+C                      = US
+ST                     = TX
+L                      = Dallas
+O                      = Texas Instruments Incorporated
+OU                     = Processors
+CN                     = TI Support
+emailAddress           = support@ti.com
+
+[ v3_ca ]
+basicConstraints       = CA:true
+1.3.6.1.4.1.294.1.3    = ASN1:SEQUENCE:swrv
+1.3.6.1.4.1.294.1.34   = ASN1:SEQUENCE:sysfw_image_integrity
+1.3.6.1.4.1.294.1.35   = ASN1:SEQUENCE:sysfw_image_load
+
+[ swrv ]
+swrv = INTEGER:{swrev}
+
+[ sysfw_image_integrity ]
+shaType                = OID:2.16.840.1.101.3.4.2.3
+shaValue               = FORMAT:HEX,OCT:{hashval}
+imageSize              = INTEGER:{imagesize}
+
+[ sysfw_image_load ]
+destAddr = FORMAT:HEX,OCT:00000000
+authInPlace = INTEGER:2
+
+''', file=outf)
+        stdout = self.openssl.x509_cert_custom(
+            cert_fname=output_fname,
+            key_fname=self.key_fname,
+            config_fname=config_fname,
+            sha=self.sha)
+        if stdout is not None:
+            data = tools.read_file(output_fname)
+        else:
+            # Bintool is missing; just use 4KB of zero data
+            self.record_missing_bintool(self.openssl)
+            data = tools.get_bytes(0, 4096)
+        return data
+
+    def ObtainContents(self):
+        data = self.GetCertificate(False)
+        if data is None:
+            return False
+        self.SetContents(data)
+        return True
+
+    def ProcessContents(self):
+        # The blob may have changed due to WriteSymbols()
+        data = self.GetCertificate(True)
+        return self.ProcessContentsUpdate(data)
+
+    def AddBintools(self, btools):
+        super().AddBintools(btools)
+        self.openssl = self.AddBintool(btools, 'openssl')