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/* | ||
K12 based on the eXtended Keccak Code Package (XKCP) | ||
https://github.com/XKCP/XKCP | ||
KangarooTwelve, designed by Guido Bertoni, Joan Daemen, Michaël Peeters, Gilles Van Assche, Ronny Van Keer and Benoît | ||
Viguier. | ||
Implementation by Gilles Van Assche and Ronny Van Keer, hereby denoted as "the implementer". | ||
For more information, feedback or questions, please refer to the Keccak Team website: | ||
https://keccak.team/ | ||
To the extent possible under law, the implementer has waived all copyright | ||
and related or neighboring rights to the source code in this file. | ||
http://creativecommons.org/publicdomain/zero/1.0/ | ||
*/ | ||
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#ifndef _KangarooTwelve_h_ | ||
#define _KangarooTwelve_h_ | ||
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#include <stddef.h> | ||
#include <stdint.h> | ||
#ifdef ALIGN | ||
#undef ALIGN | ||
#endif | ||
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#if defined(__GNUC__) | ||
#define ALIGN(x) __attribute__((aligned(x))) | ||
#elif defined(_MSC_VER) | ||
#define ALIGN(x) __declspec(align(x)) | ||
#elif defined(__ARMCC_VERSION) | ||
#define ALIGN(x) __align(x) | ||
#else | ||
#define ALIGN(x) | ||
#endif | ||
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#define KeccakP1600_stateSizeInBytes 200 | ||
#define KeccakP1600_stateAlignment 8 | ||
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extern "C" { | ||
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typedef struct TurboSHAKE_InstanceStruct { | ||
uint8_t state[KeccakP1600_stateSizeInBytes]; | ||
unsigned int rate; | ||
uint8_t byteIOIndex; | ||
uint8_t squeezing; | ||
} TurboSHAKE_Instance; | ||
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typedef struct KangarooTwelve_InstanceStruct { | ||
ALIGN(KeccakP1600_stateAlignment) TurboSHAKE_Instance queueNode; | ||
ALIGN(KeccakP1600_stateAlignment) TurboSHAKE_Instance finalNode; | ||
size_t fixedOutputLength; | ||
size_t blockNumber; | ||
unsigned int queueAbsorbedLen; | ||
int phase; | ||
int securityLevel; | ||
} KangarooTwelve_Instance; | ||
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/** Extendable ouput function KangarooTwelve. | ||
* @param input Pointer to the input message (M). | ||
* @param inputByteLen The length of the input message in bytes. | ||
* @param output Pointer to the output buffer. | ||
* @param outputByteLen The desired number of output bytes. | ||
* @param customization Pointer to the customization string (C). | ||
* @param customByteLen The length of the customization string in bytes. | ||
* @param securityLevel The desired security strength level (128 bits or 256 bits). | ||
* @return 0 if successful, 1 otherwise. | ||
*/ | ||
int KangarooTwelve(int securityLevel, const unsigned char *input, size_t inputByteLen, unsigned char *output, | ||
size_t outputByteLen, const unsigned char *customization, size_t customByteLen); | ||
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/** | ||
* Wrapper around `KangarooTwelve` to use the 128-bit security level. | ||
*/ | ||
int KT128(const unsigned char *input, size_t inputByteLen, unsigned char *output, size_t outputByteLen, | ||
const unsigned char *customization, size_t customByteLen); | ||
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/** | ||
* Wrapper around `KangarooTwelve` to use the 256-bit security level. | ||
*/ | ||
int KT256(const unsigned char *input, size_t inputByteLen, unsigned char *output, size_t outputByteLen, | ||
const unsigned char *customization, size_t customByteLen); | ||
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/** | ||
* Function to initialize a KangarooTwelve instance. | ||
* @param ktInstance Pointer to the instance to be initialized. | ||
* @param securityLevel The desired security strength level (128 bits or 256 bits). | ||
* @param outputByteLen The desired number of output bytes, | ||
* or 0 for an arbitrarily-long output. | ||
* @return 0 if successful, 1 otherwise. | ||
*/ | ||
int KangarooTwelve_Initialize(KangarooTwelve_Instance *ktInstance, int securityLevel, size_t outputByteLen); | ||
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#define KT128_Initialize(instance, outputByteLen) KangarooTwelve_Initialize((instance), 128, (outputByteLen)); | ||
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#define KT256_Initialize(instance, outputByteLen) KangarooTwelve_Initialize((instance), 256, (outputByteLen)); | ||
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/** | ||
* Function to give input data to be absorbed. | ||
* @param ktInstance Pointer to the instance initialized by KangarooTwelve_Initialize(). | ||
* @param input Pointer to the input message data (M). | ||
* @param inputByteLen The number of bytes provided in the input message data. | ||
* @return 0 if successful, 1 otherwise. | ||
*/ | ||
int KangarooTwelve_Update(KangarooTwelve_Instance *ktInstance, const unsigned char *input, size_t inputByteLen); | ||
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/** | ||
* Function to call after all the input message has been input, and to get | ||
* output bytes if the length was specified when calling KangarooTwelve_Initialize(). | ||
* @param ktInstance Pointer to the hash instance initialized by KangarooTwelve_Initialize(). | ||
* If @a outputByteLen was not 0 in the call to KangarooTwelve_Initialize(), the number of | ||
* output bytes is equal to @a outputByteLen. | ||
* If @a outputByteLen was 0 in the call to KangarooTwelve_Initialize(), the output bytes | ||
* must be extracted using the KangarooTwelve_Squeeze() function. | ||
* @param output Pointer to the buffer where to store the output data. | ||
* @param customization Pointer to the customization string (C). | ||
* @param customByteLen The length of the customization string in bytes. | ||
* @return 0 if successful, 1 otherwise. | ||
*/ | ||
int KangarooTwelve_Final(KangarooTwelve_Instance *ktInstance, unsigned char *output, const unsigned char *customization, | ||
size_t customByteLen); | ||
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/** | ||
* Function to squeeze output data. | ||
* @param ktInstance Pointer to the hash instance initialized by KangarooTwelve_Initialize(). | ||
* @param data Pointer to the buffer where to store the output data. | ||
* @param outputByteLen The number of output bytes desired. | ||
* @pre KangarooTwelve_Final() must have been already called. | ||
* @return 0 if successful, 1 otherwise. | ||
*/ | ||
int KangarooTwelve_Squeeze(KangarooTwelve_Instance *ktInstance, unsigned char *output, size_t outputByteLen); | ||
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#if !defined(KeccakP1600_disableParallelism) && defined(KeccakP1600_enable_simd_options) | ||
/** | ||
* Functions to selectively disable the use of CPU features. Should be rarely | ||
* needed; if you're not sure this is what you want, don't worry about it. | ||
* | ||
* /!\ WARNING /!\: Calling these functions REQUIRES that there are no | ||
* KangarooTwelve instances in use. The effects are global and affect the code | ||
* paths taken by every call, as well as the details of the represented states. | ||
* Calling these functions in the middle of your program (as opposed to during | ||
* setup) is PROBABLY WRONG. | ||
* | ||
* These functions are at present only used to increase test suite coverage, | ||
* and demonstrate comparative performance between implementations in different | ||
* instruction sets. To enable them, the macro KeccakP1600_enable_simd_options | ||
* must be defined at compile time. | ||
* | ||
* They can potentially also be useful in an environment where it is | ||
* detrimental to online large vector units on the CPU, since doing so can lead | ||
* to downclocking, performance hits in other threads sharing the same CPU | ||
* core, and short delays while the CPU's power license is increased to online | ||
* the vector unit. | ||
* | ||
* In the majority of situations, however, this should rarely matter and it is | ||
* usually the case that the performance difference will be a wash or even an | ||
* overall improvement despite the downsides. | ||
* | ||
* @return 1 if the feature was enabled and available and has been turned off, | ||
* 0 if it was already disabled or unavailable. | ||
*/ | ||
int KangarooTwelve_DisableAVX512(void); | ||
int KangarooTwelve_DisableAVX2(void); | ||
int KangarooTwelve_DisableSSSE3(void); | ||
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/** | ||
* Function to reset all CPU features to enabled-if-available. Calling this | ||
* always has no effect if no CPU features have been explicitly disabled. | ||
*/ | ||
void KangarooTwelve_EnableAllCpuFeatures(void); | ||
#endif // !KeccakP1600_disableParallelism && KeccakP1600_enable_simd_options | ||
} | ||
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#endif |
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