SHA512_Transform
void SHA512_Transform(SHA512_CTX *c, const unsigned char *data);
md_transform = (void(*)(void *ctx, const unsigned char *block)) SHA512_Transform;
md_transform = (void(*)(void *ctx, const unsigned char *block)) SHA512_Transform;
void SHA512_Transform(SHA512_CTX*, const sha2_word64*);
SHA512_Transform(context, (sha2_word64*)context->buffer);
SHA512_Transform(context, (const sha2_word64*)data);
SHA512_Transform(context, (sha2_word64*)context->buffer);
SHA512_Transform(context, (sha2_word64*)context->buffer);