add cipher bindings for CommonCrypto

2 files changed, 132 insertions, 0 deletions

diff --git a/cryptography/hazmat/bindings/commoncrypto/binding.py b/cryptography/hazmat/bindings/commoncrypto/binding.py
index 9c1af40a..a5a0dca8 100644
--- a/cryptography/hazmat/bindings/commoncrypto/binding.py
+++ b/cryptography/hazmat/bindings/commoncrypto/binding.py
@@ -26,6 +26,7 @@ class Binding(object):
     _modules = [
         "common_digest",
         "common_hmac",
+        "common_cryptor",
     ]
 
     ffi = None
diff --git a/cryptography/hazmat/bindings/commoncrypto/common_cryptor.py b/cryptography/hazmat/bindings/commoncrypto/common_cryptor.py
new file mode 100644
index 00000000..69edf1e7
--- /dev/null
+++ b/cryptography/hazmat/bindings/commoncrypto/common_cryptor.py
@@ -0,0 +1,131 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+INCLUDES = """
+#include <CommonCrypto/CommonCryptor.h>
+"""
+
+TYPES = """
+enum {
+    kCCAlgorithmAES128 = 0,
+    kCCAlgorithmDES,
+    kCCAlgorithm3DES,
+    kCCAlgorithmCAST,
+    kCCAlgorithmRC4,
+    kCCAlgorithmRC2,
+    kCCAlgorithmBlowfish
+};
+typedef uint32_t CCAlgorithm;
+enum {
+    kCCSuccess  = 0,
+    kCCParamError       = -4300,
+    kCCBufferTooSmall   = -4301,
+    kCCMemoryFailure    = -4302,
+    kCCAlignmentError   = -4303,
+    kCCDecodeError      = -4304,
+    kCCUnimplemented    = -4305
+};
+typedef int32_t CCCryptorStatus;
+typedef uint32_t CCOptions;
+enum {
+    kCCEncrypt = 0,
+    kCCDecrypt,
+};
+typedef uint32_t CCOperation;
+typedef ... *CCCryptorRef;
+
+enum {
+    kCCModeOptionCTR_LE = 0x0001,
+    kCCModeOptionCTR_BE = 0x0002
+};
+
+typedef uint32_t CCModeOptions;
+
+enum {
+    kCCModeECB      = 1,
+    kCCModeCBC      = 2,
+    kCCModeCFB      = 3,
+    kCCModeCTR      = 4,
+    kCCModeF8       = 5, // Unimplemented for now (not included)
+    kCCModeLRW      = 6, // Unimplemented for now (not included)
+    kCCModeOFB      = 7,
+    kCCModeXTS      = 8,
+    kCCModeRC4      = 9,
+    kCCModeCFB8     = 10,
+};
+typedef uint32_t CCMode;
+enum {
+    ccNoPadding         = 0,
+    ccPKCS7Padding      = 1,
+};
+typedef uint32_t CCPadding;
+"""
+
+FUNCTIONS = """
+CCCryptorStatus CCCryptorCreateWithMode(
+    CCOperation,             /* kCCEncrypt, kCCEncrypt */
+    CCMode,
+    CCAlgorithm,
+    CCPadding,
+    const void *,            /* optional initialization vector */
+    const void *,           /* raw key material */
+    size_t,
+    const void *,         /* raw tweak material */
+    size_t,
+    int,      /* number of rounds. 0 == default */
+    CCModeOptions,
+    CCCryptorRef *);   /* RETURNED */
+
+CCCryptorStatus CCCryptorCreate(
+    CCOperation,             /* kCCEncrypt, etc. */
+    CCAlgorithm,            /* kCCAlgorithmDES, etc. */
+    CCOptions,          /* kCCOptionPKCS7Padding, etc. */
+    const void *,            /* raw key material */
+    size_t,
+    const void *,             /* optional initialization vector */
+    CCCryptorRef *);  /* RETURNED */
+CCCryptorStatus CCCryptorUpdate(
+    CCCryptorRef,
+    const void *,
+    size_t,
+    void *,              /* data RETURNED here */
+    size_t,
+    size_t *);      /* number of bytes written */
+CCCryptorStatus CCCryptorFinal(
+    CCCryptorRef,
+    void *,
+    size_t,
+    size_t *);      /* number of bytes written */
+CCCryptorStatus CCCryptorRelease(CCCryptorRef);
+
+/* GCM functions, 10.8+ iOS 5+ */
+enum {
+    kCCModeGCM     = 11
+};
+CCCryptorStatus CCCryptorGCMAddIV(CCCryptorRef, const void *, size_t);
+CCCryptorStatus CCCryptorGCMAddAAD(CCCryptorRef, const void *, size_t);
+CCCryptorStatus CCCryptorGCMEncrypt(CCCryptorRef, const void *, size_t,
+                                    void *);
+CCCryptorStatus CCCryptorGCMDecrypt(CCCryptorRef, const void *, size_t,
+                                    void *);
+CCCryptorStatus CCCryptorGCMFinal(CCCryptorRef, const void *, size_t *);
+CCCryptorStatus CCCryptorGCMReset(CCCryptorRef);
+"""
+
+MACROS = """
+"""
+
+CUSTOMIZATIONS = """
+"""
+
+CONDITIONAL_NAMES = {}