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62 lines
2.5 KiB
C
62 lines
2.5 KiB
C
#ifndef MBEDTLS_SHA256_H_
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#define MBEDTLS_SHA256_H_
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#include "third_party/mbedtls/config.h"
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#include "third_party/mbedtls/platform.h"
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COSMOPOLITAN_C_START_
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/* clang-format off */
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#define MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED -0x0037 /*< SHA-256 hardware accelerator failed */
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#define MBEDTLS_ERR_SHA256_BAD_INPUT_DATA -0x0074 /*< SHA-256 input data was malformed. */
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/**
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* \brief The SHA-256 context structure.
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*
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* The structure is used both for SHA-256 and for SHA-224
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* checksum calculations. The choice between these two is
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* made in the call to mbedtls_sha256_starts_ret().
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*/
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typedef struct mbedtls_sha256_context
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{
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uint32_t state[8]; /*!< The intermediate digest state. */
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uint32_t total[2]; /*!< The number of Bytes processed. */
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unsigned char buffer[64]; /*!< The data block being processed. */
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int is224; /*!< Determines which function to use:
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0: Use SHA-256, or 1: Use SHA-224. */
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}
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mbedtls_sha256_context;
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void mbedtls_sha256_clone( mbedtls_sha256_context *, const mbedtls_sha256_context * );
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int mbedtls_sha256_starts_ret( mbedtls_sha256_context *, int );
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int mbedtls_sha256_update_ret( mbedtls_sha256_context *, const unsigned char *, size_t );
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int mbedtls_sha256_finish_ret( mbedtls_sha256_context *, unsigned char[32] );
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int mbedtls_internal_sha256_process( mbedtls_sha256_context *, const unsigned char[64] );
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int mbedtls_sha256_ret( const void *, size_t, unsigned char[32], int );
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int mbedtls_sha256_ret_224( const void *, size_t , unsigned char * );
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int mbedtls_sha256_ret_256( const void *, size_t , unsigned char * );
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int mbedtls_sha256_self_test( int );
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/**
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* \brief This function initializes a SHA-256 context.
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*
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* \param ctx The SHA-256 context to initialize. This must not be \c NULL.
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*/
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static inline void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
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{
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mbedtls_platform_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
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}
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/**
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* \brief This function clears a SHA-256 context.
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*
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* \param ctx The SHA-256 context to clear. This may be \c NULL, in which
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* case this function returns immediately. If it is not \c NULL,
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* it must point to an initialized SHA-256 context.
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*/
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static inline void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
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{
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if( !ctx ) return;
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mbedtls_platform_zeroize( ctx, sizeof( mbedtls_sha256_context ) );
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}
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COSMOPOLITAN_C_END_
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#endif /* MBEDTLS_SHA256_H_ */
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