X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/Security/libsecurity_transform/lib/EncryptTransformUtilities.cpp

diff --git a/Security/libsecurity_transform/lib/EncryptTransformUtilities.cpp b/Security/libsecurity_transform/lib/EncryptTransformUtilities.cpp
new file mode 100644
index 00000000..0ddeabcf
--- /dev/null
+++ b/Security/libsecurity_transform/lib/EncryptTransformUtilities.cpp
@@ -0,0 +1,189 @@
+/*
+ * Copyright (c) 2010-2011 Apple Inc. All Rights Reserved.
+ * 
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+/*!
+ @header EncryptTransformUtilities
+ Provides utilies for the SecEncryptTransform file.
+ 
+ */
+
+#include "EncryptTransformUtilities.h"
+#include "SecEncryptTransform.h"
+
+/* --------------------------------------------------------------------------
+ method: 		ConvertPaddingStringToEnum
+ description: 	Get the CSSM_PADDING value from a CFString
+ -------------------------------------------------------------------------- */
+uint32	ConvertPaddingStringToEnum(CFStringRef paddingStr)
+{
+	uint32 result = -1;		// Guilty until proven
+	if (NULL == paddingStr)
+	{
+		return result;
+	}
+	
+	if (CFEqual(paddingStr, kSecPaddingNoneKey))
+	{
+		result = CSSM_PADDING_NONE; 
+	}
+	else if (CFEqual(paddingStr, kSecPaddingPKCS1Key))
+	{
+		result = CSSM_PADDING_PKCS7; //CSSM_PADDING_PKCS1 ois not supported
+	}
+	else if (CFEqual(paddingStr, kSecPaddingPKCS5Key))
+	{
+		result = CSSM_PADDING_PKCS5;
+	}
+	else if (CFEqual(paddingStr, kSecPaddingPKCS7Key))
+	{
+		result = CSSM_PADDING_PKCS7;
+	}
+	return result;	
+}
+
+
+/* --------------------------------------------------------------------------
+ method: 		ConvertPaddingEnumToString
+ description: 	Get the corresponding CFStringRef for a CSSM_PADDING value
+ -------------------------------------------------------------------------- */
+CFStringRef ConvertPaddingEnumToString(CSSM_PADDING paddingEnum)
+{
+	CFStringRef result = NULL;
+	switch (paddingEnum)
+	{
+		case CSSM_PADDING_NONE:
+			result = kSecPaddingNoneKey;
+			break;
+			
+		case CSSM_PADDING_PKCS5:
+			result = kSecPaddingPKCS5Key;
+			break;
+			
+		case CSSM_PADDING_PKCS7:
+			result = kSecPaddingPKCS7Key;
+			break;
+			
+		case CSSM_PADDING_PKCS1:
+			result = kSecPaddingPKCS1Key;
+			break;
+			
+		default:
+			result = NULL;
+			break;
+	}
+	
+	return result;
+}
+
+
+
+/* --------------------------------------------------------------------------
+ method: 		ConvertEncryptModeStringToEnum
+ description: 	Given a string that represents an encryption mode return the
+ CSSM_ENCRYPT_MODE value
+ -------------------------------------------------------------------------- */
+uint32	ConvertEncryptModeStringToEnum(CFStringRef modeStr, Boolean hasPadding)
+{
+	uint32 result = -1;	// Guilty until proven
+	
+	if (NULL == modeStr)
+	{
+		return result;
+	}
+	
+	if (CFEqual(modeStr, kSecModeNoneKey))
+	{
+		result = (hasPadding) ? CSSM_ALGMODE_ECBPad : CSSM_ALGMODE_ECB;
+	}
+	else if (CFEqual(modeStr, kSecModeECBKey))
+	{
+		result = (hasPadding) ? CSSM_ALGMODE_ECBPad : CSSM_ALGMODE_ECB;
+	}
+	else if (CFEqual(modeStr, kSecModeCBCKey))
+	{
+        result = (hasPadding) ? CSSM_ALGMODE_CBCPadIV8 : CSSM_ALGMODE_CBC;
+	}
+	else if (CFEqual(modeStr, kSecModeCFBKey))
+	{
+		result = (hasPadding) ? CSSM_ALGMODE_CFBPadIV8 : CSSM_ALGMODE_CFB;
+	}
+	else if (CFEqual(modeStr, kSecModeOFBKey))
+	{
+		result = (hasPadding) ? CSSM_ALGMODE_OFBPadIV8 : CSSM_ALGMODE_OFB;
+	}
+    
+	return result;	
+}
+
+/* --------------------------------------------------------------------------
+ method: 		ConvertEncryptModeEnumToString
+ description: 	Given a CSSM_ENCRYPT_MODE value return the corresponding 
+ CFString representation.
+ -------------------------------------------------------------------------- */
+CFStringRef ConvertEncryptModeEnumToString(CSSM_ENCRYPT_MODE paddingEnum)
+{
+	CFStringRef result = NULL;
+	
+	switch (paddingEnum)
+	{
+		case CSSM_ALGMODE_NONE:
+		default:
+			result = kSecModeNoneKey;
+			break;	
+			
+		case CSSM_ALGMODE_ECB:
+		case CSSM_ALGMODE_ECBPad:
+		case CSSM_ALGMODE_ECB64:
+		case CSSM_ALGMODE_ECB128:
+		case CSSM_ALGMODE_ECB96:
+			result = kSecModeECBKey;
+			break;
+			
+		case CSSM_ALGMODE_CBC:
+		case CSSM_ALGMODE_CBC_IV8:
+		case CSSM_ALGMODE_CBCPadIV8:
+		case CSSM_ALGMODE_CBC64:
+		case CSSM_ALGMODE_CBC128:
+			result = kSecModeCBCKey;
+			break;
+			
+		case CSSM_ALGMODE_CFB:
+		case CSSM_ALGMODE_CFB_IV8:
+		case CSSM_ALGMODE_CFBPadIV8:
+		case CSSM_ALGMODE_CFB32:
+		case CSSM_ALGMODE_CFB16:
+		case CSSM_ALGMODE_CFB8:
+			result = kSecModeCFBKey;
+			break;
+			
+		case CSSM_ALGMODE_OFB:
+		case CSSM_ALGMODE_OFB_IV8:
+		case CSSM_ALGMODE_OFBPadIV8:
+		case CSSM_ALGMODE_OFB64:
+			result = kSecModeOFBKey;
+			break;		
+	}
+	
+	return result;	
+}
+