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-rw-r--r--docs/exceptions.rst9
-rw-r--r--docs/hazmat/primitives/symmetric-encryption.rst9
-rw-r--r--docs/index.rst1
3 files changed, 19 insertions, 0 deletions
diff --git a/docs/exceptions.rst b/docs/exceptions.rst
new file mode 100644
index 00000000..b391e620
--- /dev/null
+++ b/docs/exceptions.rst
@@ -0,0 +1,9 @@
+Exceptions
+==========
+
+.. currentmodule:: cryptography.exceptions
+
+.. class:: NoSuchAlgorithm
+
+ This is raised when a backend doesn't support the requested algorithm (or
+ combination of algorithms).
diff --git a/docs/hazmat/primitives/symmetric-encryption.rst b/docs/hazmat/primitives/symmetric-encryption.rst
index b8b1c839..48bad928 100644
--- a/docs/hazmat/primitives/symmetric-encryption.rst
+++ b/docs/hazmat/primitives/symmetric-encryption.rst
@@ -42,12 +42,21 @@ where the encrypter and decrypter both use the same key.
:class:`~cryptography.hazmat.primitives.interfaces.CipherContext`
provider.
+ If the backend doesn't support the requested combination of ``cipher``
+ and ``mode`` a :class:`cryptography.exceptions.NoSuchAlgorithm` will
+ be raised.
+
.. method:: decryptor()
:return: A decrypting
:class:`~cryptography.hazmat.primitives.interfaces.CipherContext`
provider.
+ If the backend doesn't support the requested combination of ``cipher``
+ and ``mode`` a :class:`cryptography.exceptions.NoSuchAlgorithm` will
+ be raised.
+
+
.. currentmodule:: cryptography.hazmat.primitives.interfaces
.. class:: CipherContext
diff --git a/docs/index.rst b/docs/index.rst
index 4fd5d3be..eb30b5dd 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -31,6 +31,7 @@ Contents
:maxdepth: 2
architecture
+ exceptions
contributing
security
community