Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_cryptkit / lib / feeDES.h

diff --git a/Security/libsecurity_cryptkit/lib/feeDES.h b/Security/libsecurity_cryptkit/lib/feeDES.h
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+++ b/Security/libsecurity_cryptkit/lib/feeDES.h
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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.
+ ***************************************************************************
+ *
+ * FeeDES.h - generic, portable DES encryption object
+ *
+ * Revision History
+ * ----------------
+ * 26 Aug 96 at NeXT
+ *     Created.
+ */
+
+#ifndef        _CK_FEEDES_H_
+#define _CK_FEEDES_H_
+
+#if    !defined(__MACH__)
+#include <ckconfig.h>
+#include <feeTypes.h>
+#else
+#include <security_cryptkit/ckconfig.h>
+#include <security_cryptkit/feeTypes.h>
+#endif
+
+#if    CRYPTKIT_SYMMETRIC_ENABLE
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FEE_DES_MIN_STATE_SIZE 8
+
+/*
+ * Opaque object handle.
+ */
+typedef void *feeDES;
+
+/*
+ * Alloc and init a feeDES object with specified initial state.
+ * State must be at least 8 bytes; only 8 bytes are used, ignoring
+ * MSB of each bytes.
+ */
+feeDES feeDESNewWithState(const unsigned char *state,
+       unsigned stateLen);
+
+void feeDESFree(feeDES des);
+
+/*
+ * Set new initial state.
+ */
+feeReturn feeDESSetState(feeDES des,
+       const unsigned char *state,
+       unsigned stateLen);
+
+/*
+ * Set block or chain (CBC) mode. CBC is default.
+ */
+void feeDESSetBlockMode(feeDES des);
+void feeDESSetChainMode(feeDES des);
+
+/*
+ * Plaintext block size.
+ */
+unsigned feeDESPlainBlockSize(feeDES des);
+
+/*
+ * Ciphertext block size used for decryption.
+ */
+unsigned feeDESCipherBlockSize(feeDES des);
+
+/*
+ * Required size of buffer for ciphertext, upon encrypting one
+ * block of plaintext.
+ */
+unsigned feeDESCipherBufSize(feeDES des);
+
+/*
+
+ * Return the size of ciphertext to hold specified size of plaintext.
+
+ */
+
+unsigned feeDESCipherTextSize(feeDES des, unsigned plainTextSize);
+
+
+/*
+ * Key size in bits.
+ */
+unsigned feeDESKeySize(feeDES des);
+
+/*
+ * Encrypt a block or less of data. Caller malloc's cipherText. Generates
+ * up to (2 * feeDESBlockSize) bytes of cipherText. If plainTextLen is
+ * less than feeDESBlockSize, finalBlock must be true.
+ */
+feeReturn feeDESEncryptBlock(feeDES des,
+       const unsigned char *plainText,
+       unsigned plainTextLen,
+       unsigned char *cipherText,
+       unsigned *cipherTextLen,                // RETURNED
+       int finalBlock);
+
+/*
+ * Decrypt (exactly) a block of data. Caller malloc's plainText. Always
+ * generates feeDESBlockSize bytes of plainText, unless 'finalBlock' is
+ * non-zero (in which case feeDESBlockSize or less bytes of plainText are
+ * generated).
+ */
+feeReturn feeDESDecryptBlock(feeDES des,
+       const unsigned char *cipherText,
+       unsigned cipherTextLen,
+       unsigned char *plainText,
+       unsigned *plainTextLen,                 // RETURNED
+       int finalBlock);
+
+/*
+ * Convenience routines to encrypt & decrypt multi-block data.
+ */
+feeReturn feeDESEncrypt(feeDES des,
+       const unsigned char *plainText,
+       unsigned plainTextLen,
+       unsigned char **cipherText,             // malloc'd and RETURNED
+       unsigned *cipherTextLen);               // RETURNED
+
+feeReturn feeDESDecrypt(feeDES des,
+       const unsigned char *cipherText,
+       unsigned cipherTextLen,
+       unsigned char **plainText,              // malloc'd and RETURNED
+       unsigned *plainTextLen);                // RETURNED
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CRYPTKIT_SYMMETRIC_ENABLE */
+#endif /*_CK_FEEDES_H_*/