X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/Security/libsecurity_cryptkit/lib/feeFEEDExp.h

diff --git a/Security/libsecurity_cryptkit/lib/feeFEEDExp.h b/Security/libsecurity_cryptkit/lib/feeFEEDExp.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.
+ ***************************************************************************
+ *
+ * feeFEEDExp.h - generic FEED encryption object using 2:1 expansion
+ *
+ * Revision History
+ * ----------------
+ * 28 Aug 96 at NeXT
+ *	Created.
+ */
+
+#ifndef	_CK_FEEFEEDEXP_H_
+#define _CK_FEEFEEDEXP_H_
+
+#if	!defined(__MACH__)
+#include <ckconfig.h>
+#include <feeTypes.h>
+#include <feePublicKey.h>
+#else
+#include <security_cryptkit/ckconfig.h>
+#include <security_cryptkit/feeTypes.h>
+#include <security_cryptkit/feePublicKey.h>
+#endif
+
+#if	CRYPTKIT_ASYMMETRIC_ENABLE
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Opaque object handle.
+ */
+typedef void *feeFEEDExp;
+
+/*
+ * Alloc and init a feeFEEDExp object associated with specified feePubKey.
+ */
+feeFEEDExp feeFEEDExpNewWithPubKey(
+	feePubKey pubKey,
+	feeRandFcn randFcn,		// optional 
+	void *randRef);
+
+void feeFEEDExpFree(feeFEEDExp feed);
+
+/*
+ * Plaintext block size.
+ */
+unsigned feeFEEDExpPlainBlockSize(feeFEEDExp feed);
+
+/*
+ * Ciphertext block size used for decryption.
+ */
+unsigned feeFEEDExpCipherBlockSize(feeFEEDExp feed);
+
+/*
+ * Required size of buffer for ciphertext, upon encrypting one
+ * block of plaintext.
+ */
+unsigned feeFEEDExpCipherBufSize(feeFEEDExp feed);
+
+/*
+ * Return the size of ciphertext to hold specified size of encrypted plaintext.
+ */
+unsigned feeFEEDExpCipherTextSize(feeFEEDExp feed, unsigned plainTextSize);
+
+/*
+ * Return the size of plaintext to hold specified size of decrypted ciphertext.
+ */
+unsigned feeFEEDExpPlainTextSize(feeFEEDExp feed, unsigned cipherTextSize);
+
+/*
+ * Encrypt a block or less of data. Caller malloc's cipherText. Generates
+ * feeFEEDExpCipherBlockSize() bytes of cipherText if finalBlock is false;
+ * if finalBlock is true it could produce twice as much ciphertext. 
+ * If plainTextLen is less than feeFEEDExpPlainBlockSize(), finalBlock must be true.
+ */
+feeReturn feeFEEDExpEncryptBlock(feeFEEDExp feed,
+	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 feeFEEDExpBlockSize bytes of plainText, unless 'finalBlock' is
+ * non-zero (in which case feeFEEDExpBlockSize or less bytes of plainText are
+ * generated).
+ */
+feeReturn feeFEEDExpDecryptBlock(feeFEEDExp feed,
+	const unsigned char *cipherText,
+	unsigned cipherTextLen,
+	unsigned char *plainText,
+	unsigned *plainTextLen,			// RETURNED
+	int finalBlock);
+
+/*
+ * Convenience routines to encrypt & decrypt multi-block data.
+ */
+feeReturn feeFEEDExpEncrypt(feeFEEDExp feed,
+	const unsigned char *plainText,
+	unsigned plainTextLen,
+	unsigned char **cipherText,		// malloc'd and RETURNED
+	unsigned *cipherTextLen);		// RETURNED
+
+feeReturn feeFEEDExpDecrypt(feeFEEDExp feed,
+	const unsigned char *cipherText,
+	unsigned cipherTextLen,
+	unsigned char **plainText,		// malloc'd and RETURNED
+	unsigned *plainTextLen);		// RETURNED
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* CRYPTKIT_ASYMMETRIC_ENABLE */
+
+#endif	/*_CK_FEEFEEDEXP_H_*/