remove dsa_signature_from_components since it's no longer needed
diff --git a/cryptography/hazmat/backends/interfaces.py b/cryptography/hazmat/backends/interfaces.py
index 3192789..66ee1e4 100644
--- a/cryptography/hazmat/backends/interfaces.py
+++ b/cryptography/hazmat/backends/interfaces.py
@@ -153,12 +153,6 @@
"""
@abc.abstractmethod
- def dsa_signature_from_components(self, r, s):
- """
- Convert a DSA signature pair r and s into a DER byte string.
- """
-
- @abc.abstractmethod
def dsa_hash_supported(self, algorithm):
"""
Return True if the hash algorithm is supported by the backend for DSA.
diff --git a/cryptography/hazmat/backends/openssl/backend.py b/cryptography/hazmat/backends/openssl/backend.py
index bd1ce02..b11fe9d 100644
--- a/cryptography/hazmat/backends/openssl/backend.py
+++ b/cryptography/hazmat/backends/openssl/backend.py
@@ -479,24 +479,6 @@
return _DSAVerificationContext(self, public_key, signature,
algorithm)
- def dsa_signature_from_components(self, r, s):
- dsa_sig = self._lib.DSA_SIG_new()
- assert dsa_sig != self._ffi.NULL
- dsa_sig = self._ffi.gc(dsa_sig, self._lib.DSA_SIG_free)
-
- dsa_sig.r = self._int_to_bn(r)
- dsa_sig.s = self._int_to_bn(s)
-
- sig_len = self._lib.i2d_DSA_SIG(dsa_sig, self._ffi.NULL)
- assert sig_len != 0
-
- sig_buf = self._ffi.new("unsigned char []", sig_len)
- sig_bufptr = self._ffi.new("unsigned char **", sig_buf)
-
- sig_len = self._lib.i2d_DSA_SIG(dsa_sig, sig_bufptr)
-
- return self._ffi.buffer(sig_buf)[:sig_len]
-
def _dsa_cdata_from_public_key(self, public_key):
# Does not GC the DSA cdata. You *must* make sure it's freed
# correctly yourself!
diff --git a/docs/hazmat/backends/interfaces.rst b/docs/hazmat/backends/interfaces.rst
index e0937f9..114b993 100644
--- a/docs/hazmat/backends/interfaces.rst
+++ b/docs/hazmat/backends/interfaces.rst
@@ -360,16 +360,8 @@
:returns:
:class:`~cryptography.hazmat.primitives.interfaces.AsymmetricVerificationContext`
- .. method:: dsa_signature_from_components(r, s)
-
- :param int r: The r value which is part of a DSA signature.
-
- :param int s: The s value which is part of a DSA signature.
-
- :returns: A DSA signature in DER format.
-
.. method:: dsa_hash_supported(algorithm):
-
+
:param algorithm: An instance of a
:class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm`
provider.