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#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
static const size_t SHA256_DIGEST_LENGTH = 32;
typedef int EVP_MD;
typedef void ENGINE;
typedef struct {
int type;
union {
struct PSHA2_256_Internal *psha_256;
};
} EVP_MD_CTX;
const EVP_MD *EVP_sha256(void);
int EVP_MD_get_size(const EVP_MD *);
size_t EVP_MD_size(const EVP_MD *);
EVP_MD_CTX *EVP_MD_CTX_new(void);
int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl);
int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *d, size_t cnt);
int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *s);
void EVP_MD_CTX_free(EVP_MD_CTX *ctx);
#ifdef __cplusplus
}
#endif
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