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-rw-r--r--docs/x509/reference.rst17
1 files changed, 17 insertions, 0 deletions
diff --git a/docs/x509/reference.rst b/docs/x509/reference.rst
index baf8b1e5..dfa91fac 100644
--- a/docs/x509/reference.rst
+++ b/docs/x509/reference.rst
@@ -1181,6 +1181,23 @@ X.509 Extensions
The binary value of the identifier.
+ .. classmethod:: from_public_key(public_key)
+
+ .. versionadded:: 1.0
+
+ Creates a new SubjectKeyIdentifier instance using the public key
+ provided to generate the appropriate digest. This should be the public
+ key that is in the certificate. The generated digest is the SHA1 hash
+ of the ``subjectPublicKey`` ASN.1 bit string. This is the first
+ recommendation in :rfc:`5280` section 4.2.1.2.
+
+ :param public_key: One of
+ :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`
+ ,
+ :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey`
+ , or
+ :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey`.
+
.. class:: SubjectAlternativeName
.. versionadded:: 0.9