From 30c4ef18e4bc8e8e0b374b97c52eaf71caf2ff9c Mon Sep 17 00:00:00 2001
From: Donald Stufft <donald.stufft@gmail.com>
Date: Fri, 22 Feb 2013 00:42:28 -0500
Subject: [PATCH] Add nacl.hash, a module for secure message digests
* Supports sha256 and sha512
---
nacl/__init__.py | 1 +
nacl/hash.py | 26 ++++++++++++++++++++++++++
2 files changed, 27 insertions(+)
create mode 100644 nacl/hash.py
diff --git a/nacl/__init__.py b/nacl/__init__.py
index e69de29b..eca463aa 100644
--- a/nacl/__init__.py
+++ b/nacl/__init__.py
@@ -0,0 +1 @@
+from . import hash
diff --git a/nacl/hash.py b/nacl/hash.py
new file mode 100644
index 00000000..9ebe0cfc
--- /dev/null
+++ b/nacl/hash.py
@@ -0,0 +1,26 @@
+import binascii
+
+from . import nacl
+from .exceptions import CryptoError
+
+
+def sha256(message, binary=False):
+ digest = nacl.ffi.new("unsigned char[]", nacl.lib.crypto_hash_sha256_BYTES)
+ if not nacl.lib.crypto_hash_sha256(digest, message, len(message)):
+ raise CryptoError("Hashing failed")
+ digest = nacl.ffi.string(digest)
+
+ if binary:
+ return digest
+ return binascii.hexlify(digest).decode("ascii")
+
+
+def sha512(message, binary=False):
+ digest = nacl.ffi.new("unsigned char[]", nacl.lib.crypto_hash_sha512_BYTES)
+ if not nacl.lib.crypto_hash_sha512(digest, message, len(message)):
+ raise CryptoError("Hashing failed")
+ digest = nacl.ffi.string(digest)
+
+ if binary:
+ return digest
+ return binascii.hexlify(digest).decode("ascii")
--
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