HMAC-SHA1 signature + hash

General
1

Hi folks,

because of an API service I need to use, I have to hash a string. Thought it was a simple task, but now I am only getting confused.
From an userID (say “12345”) I need to calculate the [quote]uid_signature that is the HMAC-SHA1 signature of the userID. The string is hex-encoded. The key is your user token[/quote]…etc. (quoted from service documentation)

I did some test, but got runtime errors like “Encountered invalid character.”
Maybe it is a noob question, but have mercy, it’s Monday…

2

What’s the code from your test that resulted in “Encountered invalid character.” ?

3

[code]Dim encryptedValue As String

encryptedValue = Crypto.Hash(“DataToEncrypt”, Crypto.Algorithm.SHA1)

outsha1.Text=encryptedValue[/code]

but this is only the last of n quick tests I did, following the documentation or some example. I really didn’t go into deep testing.

4

Are you really encrypting the string “DataToEncrypt”?
That’s likely where the problem is.

5

You might also need to EncodeHex the returned MemoryBlock before trying to display it in a TextArea. I only looked a a String variable in the debugger when testing.

6

I’m betting it’s that you have to encodeHex on the result, as Tim suggested.

7

[code]Dim encryptedValue As String
encryptedValue = Crypto.Hash(“DataToEncrypt”, Crypto.Algorithm.SHA1)

outsha1.Text=EncodeHex(encryptedValue)[/code]

Works. Thank you, so easy I still wonder what I tried for 1 hour today… :slight_smile: