SHA256_Transform
#define HASH_TRANSFORM SHA256_Transform
void SHA256_Transform(SHA256_CTX *c, const unsigned char *data);
md_transform = (void(*)(void *ctx, const unsigned char *block)) SHA256_Transform;
md_transform = (void(*)(void *ctx, const unsigned char *block)) SHA256_Transform;
void SHA256_Transform(SHA256_CTX*, const sha2_word32*);
SHA256_Transform(context, (sha2_word32*)context->buffer);
SHA256_Transform(context, (const sha2_word32*)data);
SHA256_Transform(context, (sha2_word32*)context->buffer);
SHA256_Transform(context, (sha2_word32*)context->buffer);