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

diff --git a/libsecurity_apple_csp/lib/AppleCSPKeys.cpp b/libsecurity_apple_csp/lib/AppleCSPKeys.cpp
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+/*
+ * Copyright (c) 2003 Apple Computer, Inc. All Rights Reserved.
+ * 
+ * The contents of this file constitute Original Code as defined in and are
+ * subject to the Apple Public Source License Version 1.2 (the 'License').
+ * You may not use this file except in compliance with the License. Please 
+ * obtain a copy of the License at http://www.apple.com/publicsource and 
+ * read it before using this file.
+ * 
+ * This 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.
+ */
+/*
+ * AppleCSPKeys.cpp - Key support
+ */
+ 
+#include "AppleCSPKeys.h"
+#include "AppleCSPUtils.h"
+/*
+ * CSPKeyInfoProvider for symmetric keys. 
+ */
+CSPKeyInfoProvider *SymmetricKeyInfoProvider::provider(
+		const CssmKey 	&cssmKey,
+		AppleCSPSession	&session)
+{
+	if(cssmKey.blobType() != CSSM_KEYBLOB_RAW) {
+		errorLog0("KeyInfoProvider deals only with RAW keys!\n");
+		CssmError::throwMe(CSSMERR_CSP_INTERNAL_ERROR);
+	}
+	if(cssmKey.keyClass() != CSSM_KEYCLASS_SESSION_KEY) {
+		/* that's all we need to know */
+		return NULL;
+	}
+	return new SymmetricKeyInfoProvider(cssmKey, session);
+}
+ 
+SymmetricKeyInfoProvider::SymmetricKeyInfoProvider(
+	const CssmKey 	&cssmKey,
+	AppleCSPSession	&session) :
+		CSPKeyInfoProvider(cssmKey, session)
+{
+}
+
+/* cook up a Binary key */
+void SymmetricKeyInfoProvider::CssmKeyToBinary(
+	CssmKey				*paramKey,	// ignored
+	CSSM_KEYATTR_FLAGS	&attrFlags,	// IN/OUT
+	BinaryKey 			**binKey)
+{
+	CASSERT(mKey.keyClass() == CSSM_KEYCLASS_SESSION_KEY);
+	SymmetricBinaryKey *symBinKey = new SymmetricBinaryKey(
+		mKey.KeyHeader.LogicalKeySizeInBits);
+	copyCssmData(mKey, 
+		symBinKey->mKeyData, 
+		symBinKey->mAllocator);
+	*binKey = symBinKey;
+}
+
+/* obtain key size in bits */
+void SymmetricKeyInfoProvider::QueryKeySizeInBits(
+	CSSM_KEY_SIZE &keySize)
+{
+	/* FIXME - do we ever need to calculate RC2 effective size here? */
+	keySize.LogicalKeySizeInBits = keySize.EffectiveKeySizeInBits =
+		mKey.length() * 8;
+}
+
+/* 
+ * Obtain blob suitable for hashing in CSSM_APPLECSP_KEYDIGEST 
+ * passthrough.
+ */
+bool SymmetricKeyInfoProvider::getHashableBlob(
+	Allocator 	&allocator,
+	CssmData		&blob)			// blob to hash goes here
+{
+	/*
+	 * This is trivial: the raw key is already in the "proper" format.
+	 */
+	assert(mKey.blobType() == CSSM_KEYBLOB_RAW);
+	const CssmData &keyBlob = CssmData::overlay(mKey.KeyData);
+	copyCssmData(keyBlob, blob, allocator);
+	return true;
+}
+