X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/5dd5f9ec28f304ca377c42fd7f711d6cf12b90e1..5c19dc3ae3bd8e40a9c028b0deddd50ff337692c:/Security/libsecurity_transform/lib/SecMaskGenerationFunctionTransform.c

diff --git a/Security/libsecurity_transform/lib/SecMaskGenerationFunctionTransform.c b/Security/libsecurity_transform/lib/SecMaskGenerationFunctionTransform.c
deleted file mode 100644
index 8cbb1197..00000000
--- a/Security/libsecurity_transform/lib/SecMaskGenerationFunctionTransform.c
+++ /dev/null
@@ -1,178 +0,0 @@
-/*
- * Copyright (c) 2011-2012,2014 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@
- */
-
-
-#include <stdio.h>
-#include <CoreFoundation/CoreFoundation.h>
-#include "SecMaskGenerationFunctionTransform.h"
-#include "SecCustomTransform.h"
-#include "SecDigestTransform.h"
-#include "misc.h"
-#include "Utilities.h"
-
-static const CFStringRef kMaskGenerationFunctionTransformName = CFSTR("com.apple.security.MGF1");
-static const CFStringRef kLengthName = CFSTR("Length");
-
-static SecTransformInstanceBlock MaskGenerationFunctionTransform(CFStringRef name, 
-                                                  SecTransformRef newTransform, 
-                                                  SecTransformImplementationRef ref)
-{
-    __block CFMutableDataRef accumulator = CFDataCreateMutable(NULL, 0);
-    __block int32_t outputLength = 0;
-    
-    SecTransformInstanceBlock instanceBlock = ^{
-        SecTransformSetTransformAction(ref, kSecTransformActionFinalize, ^{
-            CFRelease(accumulator);
-            
-            return (CFTypeRef)NULL;
-        });
-        
-        // XXX: be a good citizen, put a validator in for the types.
-        
-        SecTransformSetAttributeAction(ref, kSecTransformActionAttributeNotification, kLengthName, ^CFTypeRef(SecTransformAttributeRef attribute, CFTypeRef value) {
-            CFNumberGetValue((CFNumberRef)value, kCFNumberSInt32Type, &outputLength);
-            if (outputLength <= 0) {
-                SecTransformCustomSetAttribute(ref, kSecTransformAbortAttributeName, kSecTransformMetaAttributeValue, CreateSecTransformErrorRef(kSecTransformErrorInvalidLength, "MaskGenerationFunction Length must be one or more (not %@)", value));
-            }
-
-            return (CFTypeRef)NULL;
-        });
-        
-        SecTransformSetAttributeAction(ref, kSecTransformActionAttributeNotification, kSecTransformInputAttributeName, ^CFTypeRef(SecTransformAttributeRef attribute, CFTypeRef value) {
-            if (value) {
-                CFDataRef d = value;
-                CFDataAppendBytes(accumulator, CFDataGetBytePtr(d), CFDataGetLength(d));
-            } else {
-                int32_t i = 0, l = 0;
-                (void)transforms_assume(outputLength > 0);
-                CFStringRef digestType = SecTranformCustomGetAttribute(ref, kSecDigestTypeAttribute, kSecTransformMetaAttributeValue);
-                SecTransformRef digest0 = transforms_assume(SecDigestTransformCreate(digestType, 0, NULL));
-                int32_t digestLength = 0;
-                {
-                    CFNumberRef digestLengthAsCFNumber = SecTransformGetAttribute(digest0, kSecDigestLengthAttribute);
-                    CFNumberGetValue(transforms_assume(digestLengthAsCFNumber), kCFNumberSInt32Type, &digestLength);
-                }
-                (void)transforms_assume(digestLength >= 0);
-
-                UInt8 *buffer = malloc(outputLength + digestLength);
-                if (!buffer) {
-                    SecTransformCustomSetAttribute(ref, kSecTransformAbortAttributeName, kSecTransformMetaAttributeValue, GetNoMemoryErrorAndRetain());
-                    return (CFErrorRef)NULL;
-                }
-
-                dispatch_group_t all_hashed = dispatch_group_create();
-                dispatch_group_enter(all_hashed);
-                for(; l < outputLength; l += digestLength, i++) {
-                    dispatch_group_enter(all_hashed);
-                    CFErrorRef err = NULL;
-                    SecTransformRef digest = NULL;
-                    if (l == 0) {
-                        digest = digest0;
-                    } else {
-                        digest = SecDigestTransformCreate(digestType, 0, &err);
-                        if (digest == NULL) {
-                            SecTransformCustomSetAttribute(ref, kSecTransformAbortAttributeName, kSecTransformMetaAttributeValue, err);
-                            return (CFErrorRef)NULL;
-                        }
-                    }
-
-                    // NOTE: we shuld be able to do this without the copy, make a transform that takes an
-                    // array and outputs each item in the array followed by a NULL ought to be quicker.
-                    CFMutableDataRef accumulatorPlusCounter = CFDataCreateMutableCopy(NULL, CFDataGetLength(accumulator) + sizeof(uint32_t), accumulator);
-                    int32_t bigendian_i = htonl(i);
-                    CFDataAppendBytes(accumulatorPlusCounter, (UInt8*)&bigendian_i, sizeof(bigendian_i));
-                    SecTransformSetAttribute(digest, kSecTransformInputAttributeName, accumulatorPlusCounter, &err);
-                    CFRelease(accumulatorPlusCounter);
-                    
-                    UInt8 *buf = buffer + l;
-                    SecTransformExecuteAsync(digest, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(CFTypeRef message, CFErrorRef error, Boolean isFinal) {
-                        if (message) {
-                            CFIndex messageLen = CFDataGetLength(message);
-                            CFDataGetBytes(message, CFRangeMake(0, messageLen), buf);
-                        }
-                        if (error) {
-                            SecTransformCustomSetAttribute(ref, kSecTransformAbortAttributeName, kSecTransformMetaAttributeValue, error);
-                        }
-                        if (isFinal) {
-                            dispatch_group_leave(all_hashed);
-                        }
-                    });
-                    CFRelease(digest);
-                }
-                
-                dispatch_group_leave(all_hashed);
-                dispatch_group_wait(all_hashed, DISPATCH_TIME_FOREVER);
-                CFDataRef out = CFDataCreateWithBytesNoCopy(NULL, buffer, outputLength, kCFAllocatorMalloc);
-                SecTransformCustomSetAttribute(ref, kSecTransformOutputAttributeName, kSecTransformMetaAttributeValue, out);
-                CFRelease(out);
-                SecTransformCustomSetAttribute(ref, kSecTransformOutputAttributeName, kSecTransformMetaAttributeValue, NULL);
-            }
-            return (CFErrorRef)NULL;
-        });
-        
-        return (CFErrorRef)NULL;
-    };
-    
-    return Block_copy(instanceBlock);
-}
-
-SecTransformRef SecCreateMaskGenerationFunctionTransform(CFStringRef hashType, int length, CFErrorRef *error)
-{
-    static dispatch_once_t once;
-	__block Boolean ok = TRUE;
-    
-    if (length <= 0) {
-        if (error) {
-            *error = CreateSecTransformErrorRef(kSecTransformErrorInvalidLength, "MaskGenerationFunction Length must be one or more (not %d)", length);
-        }
-        return NULL;
-    }
-    
-    dispatch_once(&once, ^(void) {
-        ok = SecTransformRegister(kMaskGenerationFunctionTransformName, MaskGenerationFunctionTransform, error);
-    });
-        
-    if (!ok) {
-        return NULL;
-    }
-    
-    SecTransformRef ret = SecTransformCreate(kMaskGenerationFunctionTransformName, error);
-    if (!ret) {
-        return NULL;
-    }
-    
-    if (!SecTransformSetAttribute(ret, kSecDigestTypeAttribute, hashType ? hashType : kSecDigestSHA1, error)) {
-        CFRelease(ret);
-        return NULL;
-    }
-
-    CFNumberRef len = CFNumberCreate(NULL, kCFNumberIntType, &length);
-    ok = SecTransformSetAttribute(ret, kLengthName, len, error);
-    CFRelease(len);
-    if (!ok) {
-        CFRelease(ret);
-        return NULL;
-    }
-
-    return ret;
-}