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-rw-r--r--docs/hazmat/primitives/key-derivation-functions.rst8
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/hazmat/primitives/key-derivation-functions.rst b/docs/hazmat/primitives/key-derivation-functions.rst
index 851dbb0b..174b68d2 100644
--- a/docs/hazmat/primitives/key-derivation-functions.rst
+++ b/docs/hazmat/primitives/key-derivation-functions.rst
@@ -84,6 +84,10 @@ Different KDFs are suitable for different tasks such as:
:class:`~cryptography.hazmat.backends.interfaces.PBKDF2HMACBackend`
provider.
+ :raises cryptography.exceptions.UnsupportedInterface: This is raised if the
+ provided ``backend`` does not implement
+ :class:`~cryptography.hazmat.backends.interfaces.PBKDF2HMACBackend`
+
.. method:: derive(key_material)
:param bytes key_material: The input key material. For PBKDF2 this
@@ -183,6 +187,10 @@ Different KDFs are suitable for different tasks such as:
:class:`~cryptography.hazmat.backends.interfaces.HMACBackend`
provider.
+ :raises cryptography.exceptions.UnsupportedInterface: This is raised if the
+ provided ``backend`` does not implement
+ :class:`~cryptography.hazmat.backends.interfaces.HMACBackend`
+
.. method:: derive(key_material)
:param bytes key_material: The input key material.