mirror of
https://github.com/kdave/btrfs-progs
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bbf703bfd3
Change how sha256 implementation is selected. Instead of an if-else check in the block processing function select the best version and assign the function pointer. This is slightly faster. At this point the selection is not implemented properly in hash-speedtest so all results are from the fastest version. This will be fixed once all algorithms are converted. Signed-off-by: David Sterba <dsterba@suse.com>
215 lines
7.4 KiB
C
215 lines
7.4 KiB
C
/**************************** sha.h ****************************/
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/***************** See RFC 6234 for details. *******************/
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/*
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Copyright (c) 2011 IETF Trust and the persons identified as
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authors of the code. All rights reserved.
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Redistribution and use in source and binary forms, with or
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without modification, are permitted provided that the following
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conditions are met:
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- Redistributions of source code must retain the above
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copyright notice, this list of conditions and
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the following disclaimer.
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- Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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- Neither the name of Internet Society, IETF or IETF Trust, nor
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the names of specific contributors, may be used to endorse or
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promote products derived from this software without specific
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prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SHA_H_
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#define _SHA_H_
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/*
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* Description:
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* This file implements the Secure Hash Algorithms
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* as defined in the U.S. National Institute of Standards
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* and Technology Federal Information Processing Standards
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* Publication (FIPS PUB) 180-3 published in October 2008
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* and formerly defined in its predecessors, FIPS PUB 180-1
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* and FIP PUB 180-2.
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*
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* A combined document showing all algorithms is available at
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* http://csrc.nist.gov/publications/fips/
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* fips180-3/fips180-3_final.pdf
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*
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* The five hashes are defined in these sizes:
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* SHA-1 20 byte / 160 bit
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* SHA-224 28 byte / 224 bit
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* SHA-256 32 byte / 256 bit
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* SHA-384 48 byte / 384 bit
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* SHA-512 64 byte / 512 bit
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*
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* Compilation Note:
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* These files may be compiled with two options:
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* USE_32BIT_ONLY - use 32-bit arithmetic only, for systems
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* without 64-bit integers
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*
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* USE_MODIFIED_MACROS - use alternate form of the SHA_Ch()
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* and SHA_Maj() macros that are equivalent
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* and potentially faster on many systems
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*
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*/
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#include <stdint.h>
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/*
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* If you do not have the ISO standard stdint.h header file, then you
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* must typedef the following:
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* name meaning
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* uint64_t unsigned 64-bit integer
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* uint32_t unsigned 32-bit integer
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* uint8_t unsigned 8-bit integer (i.e., unsigned char)
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* int_least16_t integer of >= 16 bits
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*
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* See stdint-example.h
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*/
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#ifndef _SHA_enum_
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#define _SHA_enum_
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/*
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* All SHA functions return one of these values.
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*/
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enum {
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shaSuccess = 0,
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shaNull, /* Null pointer parameter */
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shaInputTooLong, /* input data too long */
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shaStateError, /* called Input after FinalBits or Result */
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shaBadParam /* passed a bad parameter */
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};
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#endif /* _SHA_enum_ */
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/*
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* These constants hold size information for each of the SHA
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* hashing operations
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*/
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enum {
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SHA224_Message_Block_Size = 64,
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SHA256_Message_Block_Size = 64,
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USHA_Max_Message_Block_Size = SHA256_Message_Block_Size,
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SHA224HashSize = 28, SHA256HashSize = 32,
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USHAMaxHashSize = SHA256HashSize,
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SHA224HashSizeBits = 224,
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SHA256HashSizeBits = 256,
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USHAMaxHashSizeBits = SHA256HashSizeBits
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};
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/*
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* These constants are used in the USHA (Unified SHA) functions.
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*/
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typedef enum SHAversion {
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SHA224, SHA256,
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} SHAversion;
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/*
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* This structure will hold context information for the SHA-256
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* hashing operation.
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*/
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typedef struct SHA256Context {
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uint32_t Intermediate_Hash[SHA256HashSize/4]; /* Message Digest */
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uint32_t Length_High; /* Message length in bits */
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uint32_t Length_Low; /* Message length in bits */
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int_least16_t Message_Block_Index; /* Message_Block array index */
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/* 512-bit message blocks */
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uint8_t Message_Block[SHA256_Message_Block_Size];
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int Computed; /* Is the hash computed? */
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int Corrupted; /* Cumulative corruption code */
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} SHA256Context;
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/*
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* This structure will hold context information for the SHA-224
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* hashing operation. It uses the SHA-256 structure for computation.
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*/
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typedef struct SHA256Context SHA224Context;
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/*
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* This structure holds context information for all SHA
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* hashing operations.
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*/
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typedef struct USHAContext {
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int whichSha; /* which SHA is being used */
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union {
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SHA224Context sha224Context; SHA256Context sha256Context;
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} ctx;
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} USHAContext;
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/*
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* This structure will hold context information for the HMAC
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* keyed-hashing operation.
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*/
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typedef struct HMACContext {
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int whichSha; /* which SHA is being used */
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int hashSize; /* hash size of SHA being used */
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int blockSize; /* block size of SHA being used */
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USHAContext shaContext; /* SHA context */
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unsigned char k_opad[USHA_Max_Message_Block_Size];
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/* outer padding - key XORd with opad */
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int Computed; /* Is the MAC computed? */
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int Corrupted; /* Cumulative corruption code */
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} HMACContext;
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/*
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* Function Prototypes
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*/
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/* SHA-224 */
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extern int SHA224Reset(SHA224Context *);
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extern int SHA224Input(SHA224Context *, const uint8_t *bytes,
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unsigned int bytecount);
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extern int SHA224FinalBits(SHA224Context *, uint8_t bits,
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unsigned int bit_count);
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extern int SHA224Result(SHA224Context *,
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uint8_t Message_Digest[SHA224HashSize]);
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/* SHA-256 */
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extern int SHA256Reset(SHA256Context *);
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extern int SHA256Input(SHA256Context *, const uint8_t *bytes,
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unsigned int bytecount);
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extern int SHA256FinalBits(SHA256Context *, uint8_t bits,
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unsigned int bit_count);
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extern int SHA256Result(SHA256Context *,
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uint8_t Message_Digest[SHA256HashSize]);
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/*
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* HMAC Keyed-Hashing for Message Authentication, RFC 2104,
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* for all SHAs.
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* This interface allows any length of text input to be used.
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*/
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extern int hmacReset(HMACContext *context, enum SHAversion whichSha,
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const unsigned char *key, int key_len);
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extern int hmacInput(HMACContext *context, const unsigned char *text,
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int text_len);
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extern int hmacFinalBits(HMACContext *context, uint8_t bits,
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unsigned int bit_count);
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extern int hmacResult(HMACContext *context,
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uint8_t digest[USHAMaxHashSize]);
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void sha256_init_accel(void);
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#endif /* _SHA_H_ */
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