sha256.h

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#ifndef MBEDTLS_SHA256_H
#define MBEDTLS_SHA256_H

#if !defined(MBEDTLS_CONFIG_FILE)
#include "config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif

#include <stddef.h>
#include <stdint.h>

#if !defined(MBEDTLS_SHA256_ALT)
// Regular implementation
//

#ifdef __cplusplus
extern "C" {
#endif

typedef struct
{
    uint32_t total[2];          
    uint32_t state[8];          
    unsigned char buffer[64];   
    int is224;                  
}
mbedtls_sha256_context;

void mbedtls_sha256_init( mbedtls_sha256_context *ctx );

void mbedtls_sha256_free( mbedtls_sha256_context *ctx );

void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
                           const mbedtls_sha256_context *src );

void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 );

void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
                    size_t ilen );

void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] );

/* Internal use */
void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] );

#ifdef __cplusplus
}
#endif

#else  /* MBEDTLS_SHA256_ALT */
#include "sha256_alt.h"
#endif /* MBEDTLS_SHA256_ALT */

#ifdef __cplusplus
extern "C" {
#endif

void mbedtls_sha256( const unsigned char *input, size_t ilen,
           unsigned char output[32], int is224 );

int mbedtls_sha256_self_test( int verbose );

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_sha256.h */