I have been successfully able to transform hand-written medical test results documents to HL7 ORU_R01 v2.x, then to SDA, which will be trasformed to FHIR or C-CDA.
However, I have a category of documents which contains reference range in multiple date formats, which are measured for each gestation period. 
For example, below is one of the documents.
 

Analyte: HCG, Value: 1968, Unit: mlU/mL 

Reference Range:
Week of gestation: 3, Range: 5.8-71.2
Week of gestation: 4, Range: 9.

I have a compactJWE that I want to decrypt using a key. I read the key from a .pem file and create a JWK with "RSA-OAEP" algorithm. I have the code below in a routine (.mac) file.

decryptJWE
    #include %msql
    s file = ##class(%Stream.FileBinary).%New()
    s file.Filename = "mycert.pem"
    s rsaKey = file.Read($$$MaxLocalLength)
    zw rsaKey
    s compactJWE = "en.cry.pted.jwe"
    s jwk = ##class(%Net.JSON.JWK).%New()
    s jwkStatus = jwk.Create("RSA-OAEP", rsaKey , .privJWK, .pubJWK)
    zw jwkStatus

    s jwks = ##class(%Net.JSON.JWKS).%New()
    s jwksStatus = jwks.

So I have a base string that I want to sign using RSA-SHA256. I have a .p12 file and passphrase to get the RSA Private key using NodeJS (pem.readPkcs12 library), which I don't know how to do that in intersystems as well. (would appreciate if you can include a solution for that too)
The main problem here is I am trying to sign a string and print the result to terminal, using the code below in a routine (.mac file).