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Resolved how to get string from sha256 algorithm string encrypted

  1. How-to
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  1. Alessandro Malaguti
    Alessandro Malaguti
  2. PowerBuilder
  3. Saturday, 6 July 2024 13:52 PM UTC 
Hello,
I don't understand why the string results from sha256 encrypted algorithm are different between pb and the sqlserver query

from the PB code non-printable data are returned :
Blob lblb_data
Blob lblb_sha1
string l_res

// here the data to convert
lblb_data = Blob("003806qxgMB&g4pWF$Y20240625160915", EncodingUTF8!) 

CrypterObject lnv_CrypterObject
lnv_CrypterObject = Create CrypterObject

// Encrypt with SHA
lblb_sha1= lnv_CrypterObject.SHA(SHA1!, lblb_data)

// get a string but here non-printable data are returned
l_res = String(lblb_sha1, EncodingUTF8!)

instead if I run the query (sql-server) I see the darta I expect return:
SELECT convert(char(96), HASHBYTES('SHA2_256', '003806qxgMB&g4pWF$Y20240625160915'),2)  ;

in this case the result is readble:
4991A0194A9F80D99E75FBA2D0020A1D17802E77D7CFB8773EEDD633FA9B0F47

maybe, do I need to somehow convert the string to pb to get the same result as the query?

thank you

alberto

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Responses (2)
Alessandro Malaguti
Alessandro Malaguti Accepted Answer Pending Moderation
  1. Tuesday, 9 July 2024 13:35 PM UTC
  2. PowerBuilder
  3. # 1

yes, works fine:

//
Blob lblb_data
Blob lblb_sha256
String ls_data
string l_res

CoderObject l_CoderObject

lblb_data = Blob("003806qxgMB&g4pWF$Y20240625160915", EncodingUTF8!)

CrypterObject lnv_CrypterObject
lnv_CrypterObject = Create CrypterObject

// Encrypt with SHA
lblb_sha256= lnv_CrypterObject.SHA(SHA256!, lblb_data)  <-- here I had done I had done copy+paste too quickly, fairly is SHA256! not SHA1 to get SHA 256 algorithm

l_res = String(lblb_sha256, EncodingUTF8!)

l_CoderObject = create CoderObject
l_res = l_CoderObject.HexEncode(lblb_sha256)     <--- OK! the result is the same to the sql server query

thank you!

alberto

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Arthur Hefti
Arthur Hefti Accepted Answer Pending Moderation
  1. Saturday, 6 July 2024 14:07 PM UTC
  2. PowerBuilder
  3. # 2

Hi Alberto

the string from SQL Server is Hex encoded.

Use:

CoderObject lnv_CoderObject
lnv_CoderObject = CREATE CoderObject

l_res = lnv_CoderObject.HexEncode(lblb_sha1)

Instead of: l_res = String(lblb_sha1, EncodingUTF8!)

In addition you use SHA-256 in SQL Server and simple SHA1 in PB, you need to set SHA256! instead of SHA1!, to get the same values.

Regards
Arthur

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