X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/72a12576750f52947eb043106ba5c12c0d07decf..b1ab9ed8d0e0f1c3b66d7daa8fd5564444c56195:/libsecurity_codesigning/lib/reqmaker.cpp

diff --git a/libsecurity_codesigning/lib/reqmaker.cpp b/libsecurity_codesigning/lib/reqmaker.cpp
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+/*
+ * Copyright (c) 2006 Apple Computer, 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@
+ */
+
+//
+// reqmaker - Requirement assembler
+//
+#include "reqmaker.h"
+
+namespace Security {
+namespace CodeSigning {
+
+
+//
+// Requirement::Makers
+//
+Requirement::Maker::Maker(Kind k)
+	: mSize(1024)
+{
+	mBuffer = (Requirement *)malloc(mSize);
+	mBuffer->initialize();
+	mBuffer->kind(k);
+	mPC = sizeof(Requirement);
+}
+
+// need at least (size) bytes in the creation buffer
+void Requirement::Maker::require(size_t size)
+{
+	if (mPC + size > mSize) {
+		mSize *= 2;
+		if (mPC + size > mSize)
+			mSize = mPC + size;
+		if (!(mBuffer = (Requirement *)realloc(mBuffer, mSize)))
+			UnixError::throwMe(ENOMEM);
+	}
+}
+
+// allocate (size) bytes at end of buffer and return pointer to that
+void *Requirement::Maker::alloc(size_t size)
+{
+	// round size up to preserve alignment
+	size_t usedSize = LowLevelMemoryUtilities::alignUp(size, baseAlignment);
+	require(usedSize);
+	void *data = mBuffer->at<void>(mPC);
+	mPC += usedSize;
+	
+	// clear any padding (avoid random bytes in code image)
+	const uint32_t zero = 0;
+	memcpy(mBuffer->at<void>(mPC - usedSize + size), &zero, usedSize - size);
+	
+	// all done
+	return data;
+}
+
+// put contiguous data blob
+void Requirement::Maker::putData(const void *data, size_t length)
+{
+	put(uint32_t(length));
+	memcpy(alloc(length), data, length);
+}
+
+// Specialized Maker put operations
+void Requirement::Maker::anchor()
+{
+	put(opAppleAnchor);
+}
+
+void Requirement::Maker::anchorGeneric()
+{
+	put(opAppleGenericAnchor);
+}
+
+void Requirement::Maker::anchor(int slot, SHA1::Digest digest)
+{
+	put(opAnchorHash);
+	put(slot);
+	putData(digest, SHA1::digestLength);
+}
+
+void Requirement::Maker::anchor(int slot, const void *cert, size_t length)
+{
+	SHA1 hasher;
+	hasher(cert, length);
+	SHA1::Digest digest;
+	hasher.finish(digest);
+	anchor(slot, digest);
+}
+
+void Requirement::Maker::trustedAnchor()
+{
+	put(opTrustedCerts);
+}
+
+void Requirement::Maker::trustedAnchor(int slot)
+{
+	put(opTrustedCert);
+	put(slot);
+}
+
+void Requirement::Maker::infoKey(const string &key, const string &value)
+{
+	put(opInfoKeyValue);
+	put(key);
+	put(value);
+}
+
+void Requirement::Maker::ident(const string &identifier)
+{
+	put(opIdent);
+	put(identifier);
+}
+
+void Requirement::Maker::cdhash(SHA1::Digest digest)
+{
+	put(opCDHash);
+	putData(digest, SHA1::digestLength);
+}
+
+
+
+void Requirement::Maker::copy(const Requirement *req)
+{
+	assert(req);
+	if (req->kind() != exprForm)		// don't know how to embed this
+		MacOSError::throwMe(errSecCSReqUnsupported);
+	this->copy(req->at<const void>(sizeof(Requirement)), req->length() - sizeof(Requirement));
+}
+
+
+void *Requirement::Maker::insert(const Label &label, size_t length)
+{
+	require(length);
+	memmove(mBuffer->at<void>(label.pos + length),
+		mBuffer->at<void>(label.pos), mPC - label.pos);
+	mPC += length;
+	return mBuffer->at<void>(label.pos);
+}
+
+
+Requirement *Requirement::Maker::make()
+{
+	mBuffer->length(mPC);
+	Requirement *result = mBuffer;
+	mBuffer = NULL;
+	return result;
+}
+
+
+}	// CodeSigning
+}	// Security