1 files changed, 94 insertions, 0 deletions
diff --git a/tools/binman/btool/openssl.py b/tools/binman/btool/openssl.py
new file mode 100644
index 00000000000..3a4dbdd6d73
--- /dev/null
+++ b/tools/binman/btool/openssl.py
@@ -0,0 +1,94 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright 2022 Google LLC
+#
+"""Bintool implementation for openssl
+
+openssl provides a number of features useful for signing images
+
+Documentation is at https://www.coreboot.org/CBFS
+
+Source code is at https://www.openssl.org/
+"""
+
+import hashlib
+
+from binman import bintool
+from u_boot_pylib import tools
+
+class Bintoolopenssl(bintool.Bintool):
+    """openssl tool
+
+    This bintool supports creating new openssl certificates.
+
+    It also supports fetching a binary openssl
+
+    Documentation about openssl is at https://www.openssl.org/
+    """
+    def __init__(self, name):
+        super().__init__(
+            name, 'openssl cryptography toolkit',
+            version_regex=r'OpenSSL (.*) \(', version_args='version')
+
+    def x509_cert(self, cert_fname, input_fname, key_fname, cn, revision,
+                  config_fname):
+        """Create a certificate
+
+        Args:
+            cert_fname (str): Filename of certificate to create
+            input_fname (str): Filename containing data to sign
+            key_fname (str): Filename of .pem file
+            cn (str): Common name
+            revision (int): Revision number
+            config_fname (str): Filename to write fconfig into
+
+        Returns:
+            str: Tool output
+        """
+        indata = tools.read_file(input_fname)
+        hashval = hashlib.sha512(indata).hexdigest()
+        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 ]
+CN                     = {cert_fname}
+
+[ 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
+
+[ swrv ]
+swrv = INTEGER:{revision}
+
+[ sysfw_image_integrity ]
+shaType                = OID:2.16.840.1.101.3.4.2.3
+shaValue               = FORMAT:HEX,OCT:{hashval}
+imageSize              = INTEGER:{len(indata)}
+''', file=outf)
+        args = ['req', '-new', '-x509', '-key', key_fname, '-nodes',
+                '-outform', 'DER', '-out', cert_fname, '-config', config_fname,
+                '-sha512']
+        return self.run_cmd(*args)
+
+    def fetch(self, method):
+        """Fetch handler for openssl
+
+        This installs the openssl package using the apt utility.
+
+        Args:
+            method (FETCH_...): Method to use
+
+        Returns:
+            True if the file was fetched and now installed, None if a method
+            other than FETCH_BIN was requested
+
+        Raises:
+            Valuerror: Fetching could not be completed
+        """
+        if method != bintool.FETCH_BIN:
+            return None
+        return self.apt_install('openssl')