Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_cryptkit / lib / feeHash.c

diff --git a/Security/libsecurity_cryptkit/lib/feeHash.c b/Security/libsecurity_cryptkit/lib/feeHash.c
new file mode 100644 (file)
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+++ b/Security/libsecurity_cryptkit/lib/feeHash.c
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+/* Copyright (c) 1998,2011,2014 Apple Inc.  All Rights Reserved.
+ *
+ * NOTICE: USE OF THE MATERIALS ACCOMPANYING THIS NOTICE IS SUBJECT
+ * TO THE TERMS OF THE SIGNED "FAST ELLIPTIC ENCRYPTION (FEE) REFERENCE
+ * SOURCE CODE EVALUATION AGREEMENT" BETWEEN APPLE, INC. AND THE
+ * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE,
+ * INC.  ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL
+ * EXPOSE YOU TO LIABILITY.
+ ***************************************************************************
+ *
+ * FeeHash.c - generic, portable MD5 hash object
+ *
+ * Revision History
+ * ----------------
+ * 10/06/98            ap
+ *     Changed to compile with C++.
+ * 22 Aug 96 at NeXT
+ *     Created.
+ */
+
+#include "ckconfig.h"
+
+#if    CRYPTKIT_MD5_ENABLE
+
+#include "feeTypes.h"
+#include "feeHash.h"
+#include "ckMD5.h"
+#include "falloc.h"
+#include "platform.h"
+
+/*
+ * Private data for this object. A feeHash handle is cast to aa pointer
+ * to one of these.
+ */
+typedef struct {
+       MD5Context              context;
+       int                     isDone;
+       unsigned char   digest[MD5_DIGEST_SIZE];
+} hashInst;
+
+/*
+ * Alloc and init an empty hash object.
+ */
+feeHash feeHashAlloc(void)
+{
+       hashInst *hinst;
+
+       hinst = (hashInst *) fmalloc(sizeof(hashInst));
+       MD5Init(&hinst->context);
+       hinst->isDone = 0;
+       return hinst;
+}
+
+void feeHashReinit(feeHash hash)
+{
+       hashInst *hinst = (hashInst *) hash;
+
+       MD5Init(&hinst->context);
+       hinst->isDone = 0;
+}
+
+/*
+ * Free a hash object.
+ */
+void feeHashFree(feeHash hash)
+{
+       hashInst *hinst = (hashInst *) hash;
+
+       memset(hinst, 0, sizeof(hashInst));
+       ffree(hinst);
+}
+
+/*
+ * Add some data to the hash object.
+ */
+void feeHashAddData(feeHash hash,
+       const unsigned char *data,
+       unsigned dataLen)
+{
+       hashInst *hinst = (hashInst *) hash;
+
+       if(hinst->isDone) {
+               /*
+                * Log some kind of error here...
+                */
+               return;
+       }
+       MD5Update(&hinst->context, data, dataLen);
+}
+
+/*
+ * Obtain a pointer to completed message digest, and the length of the digest.
+ */
+unsigned char *feeHashDigest(feeHash hash)
+{
+       hashInst *hinst = (hashInst *) hash;
+
+       if(!hinst->isDone) {
+               MD5Final(&hinst->context, hinst->digest);
+               hinst->isDone = 1;
+       }
+       return hinst->digest;
+}
+
+unsigned feeHashDigestLen(void)
+{
+       return MD5_DIGEST_SIZE;
+}
+
+#endif /* CRYPTKIT_MD5_ENABLE*/