Extends supported range for integer conversion,
diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
index c509ddb..70ed25d 100644
--- a/src/cryptography/hazmat/backends/openssl/backend.py
+++ b/src/cryptography/hazmat/backends/openssl/backend.py
@@ -64,8 +64,15 @@
discarded after use.
"""
- i = backend._lib.ASN1_INTEGER_new()
- backend._lib.ASN1_INTEGER_set(i, x)
+ # Convert Python integer to OpenSSL "bignum" in case value exceeds
+ # machine's native integer limits (note: `int_to_bn` doesn't automatically
+ # GC).
+ i = backend._int_to_bn(x)
+ i = backend._ffi.gc(i, backend._lib.BN_free)
+
+ # Wrap in a ASN.1 integer. Don't GC -- as documented.
+ i = backend._lib.BN_to_ASN1_INTEGER(i, backend._ffi.NULL)
+ assert i != backend._ffi.NULL
return i