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authorLasse Collin <lasse.collin@tukaani.org>2007-12-09 00:42:33 +0200
committerLasse Collin <lasse.collin@tukaani.org>2007-12-09 00:42:33 +0200
commit5d018dc03549c1ee4958364712fb0c94e1bf2741 (patch)
tree1b211911fb33fddb3f04b77f99e81df23623ffc4 /src/liblzma/check/check.h
downloadxz-5d018dc03549c1ee4958364712fb0c94e1bf2741.tar.xz
Imported to git.
Diffstat (limited to 'src/liblzma/check/check.h')
-rw-r--r--src/liblzma/check/check.h102
1 files changed, 102 insertions, 0 deletions
diff --git a/src/liblzma/check/check.h b/src/liblzma/check/check.h
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+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file check.h
+/// \brief Prototypes for different check functions
+//
+// This code has been put into the public domain.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_CHECK_H
+#define LZMA_CHECK_H
+
+#include "common.h"
+
+
+typedef struct {
+ /// Internal state
+ uint32_t state[8];
+
+ /// Temporary 8-byte aligned buffer to hold incomplete chunk.
+ /// After lzma_check_finish(), the first 32 bytes will contain
+ /// the final digest in big endian byte order.
+ uint8_t buffer[64];
+
+ /// Size of the message excluding padding
+ uint64_t size;
+
+} lzma_sha256;
+
+
+/// \note This is not in the public API because this structure will
+/// change in future.
+typedef union {
+ uint32_t crc32;
+ uint64_t crc64;
+ lzma_sha256 sha256;
+} lzma_check;
+
+
+#ifdef HAVE_SMALL
+extern uint32_t lzma_crc32_table[8][256];
+extern uint64_t lzma_crc64_table[4][256];
+#else
+extern const uint32_t lzma_crc32_table[8][256];
+extern const uint64_t lzma_crc64_table[4][256];
+#endif
+
+// Generic
+
+/// \brief Initializes *check depending on type
+///
+/// \return LZMA_OK on success. LZMA_UNSUPPORTED_CHECK if the type is not
+/// supported by the current version or build of liblzma.
+/// LZMA_PROG_ERROR if type > LZMA_CHECK_ID_MAX.
+///
+extern lzma_ret lzma_check_init(lzma_check *check, lzma_check_type type);
+
+/// \brief Updates *check
+///
+extern void lzma_check_update(lzma_check *check, lzma_check_type type,
+ const uint8_t *buf, size_t size);
+
+/// \brief Finishes *check
+///
+extern void lzma_check_finish(lzma_check *check, lzma_check_type type);
+
+
+/*
+/// \brief Compare two checks
+///
+/// \return false if the checks are identical; true if they differ.
+///
+extern bool lzma_check_compare(
+ lzma_check *check1, lzma_check *check2, lzma_check_type type);
+*/
+
+
+// CRC32
+
+extern void lzma_crc32_init(void);
+
+
+// CRC64
+
+extern void lzma_crc64_init(void);
+
+
+// SHA256
+
+extern void lzma_sha256_init(lzma_sha256 *sha256);
+
+extern void lzma_sha256_update(
+ const uint8_t *buf, size_t size, lzma_sha256 *sha256);
+
+extern void lzma_sha256_finish(lzma_sha256 *sha256);
+
+
+#endif