Great video Erik, thank you. I wish you could make a new one explaining de differences between Debug&Publish no debug&no publish... and so on... also on attaching to session or the brand new way to debug production. Thanks!

@Hougaard

3 жыл бұрын

Great suggestion!

Thanks for sharing knowledge. For symmetric Encryption I found enough functions in Business Central but can you share if there is some support available for Asymmetric Encryption in Business Central.

Nice one.

Hi Erik, I wanted to ask you is maybe possible to sign data with RSASignaturePadding like in RSA dotnet (SignData method - SignData(Stream,HashAlgorithmName,RSASignaturePadding)), but without dotnet? I tried to find into Cryptography Management codeunit but there only have SignData methods without RSASignaturePadding. Thank you.

@Hougaard

2 жыл бұрын

Sorry, no :(

Great Erik. And why not sending only the base64 hasted text instead the file with your accounts and the watermark? As you can decrypt it. Can't you?

@Hougaard

3 жыл бұрын

Base64 is not encryption, just a data packing format.

3 жыл бұрын

@@Hougaard No. I meant encripted + base64 so the text is sorter.

More crypto videos please. Encrypt/decrypt/digital signature/hash. Thank you for sharing

Another video on this please!

@Hougaard

3 жыл бұрын

What specifically do you want to do?

@jackpeterson480

3 жыл бұрын

@@Hougaard you mentioned if we want to go deeper into cryptography and hashing to let you know in this one

want to encrypt data. any ideas? please can you do video on encryption with ex.

@Hougaard

Жыл бұрын

There's also a encryption codeunit...

@dividuttnamboodiri3283

Жыл бұрын

@@Hougaard Hey Thanks for replying but can you suggest which will be the proper method.

You have inspired me to reverse engineer ROT13

@Hougaard

3 жыл бұрын

Go for it!

Please… more crypto

I have an issue with cryptography management in BC. Scenario: I got an instream data with the pdf of an invoice. Nice. the code is something like this: SalesInvoiceHeader2.get(SalesInvoiceHeader."No."); RecRef.GetTable(SalesInvoiceHeader2); RecRef.SetRecFilter(); TempBlob.CreateOutStream(OutStream); REPORT.SaveAs(gRecSelection."Report ID", '', ReportFormat::Pdf, OutStream, RecRef); TempBlob.CreateInStream(InStream); HashValue := CU_CryptographyMgmt.GenerateHash(Instream, Algorithm::SHA256); I don't understand why, every time i execute the code (generating the Instream every time with the same sales invoice header No.) i got a different hash value. If I dowload the stream as file and i check the hash with an online tool, I got the correct hash, and I never get that hash using AL.

@Hougaard

Жыл бұрын

I believe there is a time stamp in the pdf, so you're generating a new pdf every time with report.saveas

Hi Erik, thanks for your videos. I'm trying to generate a signature for AWS Signing 4 auth api. For AWS you creating a signing key via the following (HMAC function param. is (Key, Value): kSecret = your secret access key kDate = HMAC(“AWS4” + kSecret, Date) kRegion = HMAC(kDate, Region) kService = HMAC(kRegion, Service) kSigning = HMAC(kService, “aws4_request”) Translated to AL: KDate := CryptographyManagement.GenerateHash(SignDate, Secret, HashAlgorithmType::HMACSHA256); KRegion := CryptographyManagement.GenerateHash(Region, KDate, HashAlgorithmType::HMACSHA256); KService := CryptographyManagement.GenerateHash(Service, KRegion, HashAlgorithmType::HMACSHA256); KSigning := CryptographyManagement.GenerateHash(Signing, KService, HashAlgorithmType::HMACSHA256); KDates gets the right return result, but this has been converted into a string rather than the Byte array required in the next call. When I call the next function to get “KRegion”, I get the incorrect result. I've tried using GenerateBase64KeyedHashAsBase64String instead of GenerateHash but get the same signature mismatch error. A NAV2018 version using DotNet works ok: HmacSHA256(Encoding.UTF8.GetBytes('AWS4' + secretKey), Date,kDate); HmacSHA256(dateKey, awsRegion,kRegion); HmacSHA256(dateRegionKey, awsServiceName,kService); HmacSHA256(dateRegionServiceKey, 'aws4_request',kSigning); Is there a way to obtain the result of GenerateHash as Byte array? Perhaps the only way would be using an Azure Function? Any help would be appreciated, I'm a bit frustrated with this... Thanks

@Hougaard

9 ай бұрын

Check this kzread.info/dash/bejne/hmqj3NmplJbXmco.html plus this kzread.info/dash/bejne/f5yusq6OXcLdZZc.html I would try to build a stream with the binary data, you can pass streams to generatehash.