Security-55163.44.tar.gz

[apple/security.git] / libsecurity_apple_csp / lib / pbkdDigest.cpp

diff --git a/libsecurity_apple_csp/lib/pbkdDigest.cpp b/libsecurity_apple_csp/lib/pbkdDigest.cpp
new file mode 100644 (file)
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+++ b/libsecurity_apple_csp/lib/pbkdDigest.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.
+ */
+/*
+ * pbkdDigest.cpp - SHA1/MD5 digest object for HMAC and PBE routines
+ */
+
+#include "pbkdDigest.h"
+#include <Security/cssmerr.h>
+#include <string.h>
+
+/* the casts are necessary to cover the polymorphous context types */
+DigestOps Md2Ops = { 
+       (DigestInitFcn)CC_MD2_Init, 
+       (DigestUpdateFcn)CC_MD2_Update, 
+       (DigestFinalFcn)CC_MD2_Final
+};
+DigestOps Md5Ops = { 
+       (DigestInitFcn)CC_MD5_Init, 
+       (DigestUpdateFcn)CC_MD5_Update, 
+       (DigestFinalFcn)CC_MD5_Final
+};
+DigestOps Sha1Ops = { 
+       (DigestInitFcn)CC_SHA1_Init, 
+       (DigestUpdateFcn)CC_SHA1_Update, 
+       (DigestFinalFcn)CC_SHA1_Final
+};
+
+/* Ops on a DigestCtx - all return zero on error, like the underlying digests do */
+int DigestCtxInit(
+       DigestCtx       *ctx,
+       CSSM_ALGORITHMS hashAlg)
+{
+       switch(hashAlg) {
+               case CSSM_ALGID_SHA1:
+                       ctx->ops = &Sha1Ops;
+                       break;
+               case CSSM_ALGID_MD5:
+                       ctx->ops = &Md5Ops;
+                       break;
+               case CSSM_ALGID_MD2:
+                       ctx->ops = &Md2Ops;
+                       break;
+               default:
+                       return 0;
+       }
+       ctx->hashAlg = hashAlg;
+       return ctx->ops->init(&ctx->dig);
+}
+
+void DigestCtxFree(
+       DigestCtx       *ctx)
+{
+       memset(ctx, 0, sizeof(DigestCtx));
+}
+
+int DigestCtxUpdate(
+       DigestCtx       *ctx,
+       const void *textPtr,
+       uint32 textLen)
+{
+       return ctx->ops->update(&ctx->dig, textPtr, textLen);
+}
+
+int DigestCtxFinal(
+       DigestCtx       *ctx,
+       void            *digest)
+{
+       return ctx->ops->final(digest, &ctx->dig);
+}