/* Add '1' bit to terminate, then all 0 bits, up to next block - 8. */
add(ctx, pad, 1 + ((119 - (ctx->bytes % 64)) % 64));
/* Add number of bits of data (big endian) */
/* Add '1' bit to terminate, then all 0 bits, up to next block - 8. */
add(ctx, pad, 1 + ((119 - (ctx->bytes % 64)) % 64));
/* Add number of bits of data (big endian) */