e-CryptIt Engine Xojo Plugin |

# HMAC_SHA1 Class (console safe)

Implements Keyed-Hashing using SHA1 for message authentication in compliance with RFC 2104 and 2202.
This algorithm has been tested against official test vectors.

Object
HMAC_SHA1

class HMAC_SHA1 implements

IHashAlgorithm

#### Constructors

HMAC_SHA1 (console safe) | The constructor for the HMAC_SHA1 takes a key as a parameter.

#### Methods

Final (console safe) | Use this function when you are done adding bytes to the HMAC_SHA1 class.
shared Hash | Convenience shared function to hash small data with just one line of code without creating instance of the class.
Update (console safe) | Use this method to add data with MemoryBlock to the HMAC_SHA1 stream.
Update (console safe) | Use this method to add data with string to the HMAC_SHA1 stream.

#### Constants

Version = 16.63 |

#### Test case for a known test vector

Dim key as String
Dim data as String
Dim hmac as HMAC_SHA1
Dim result as String
Dim hexResult as String
Dim i as Integer
key = "Jefe"
data = "what do ya want for nothing?"
// We do this in ASCII because the well known test vectors come in ASCII
key = ConvertEncoding(key,Encodings.ASCII)
data = ConvertEncoding(data,Encodings.ASCII)
hmac = new HMAC_SHA1(key)
hmac.Update(data)
result = hmac.Final()
// Convert to HEX
For i = 1 to 20
hexResult = hexResult + Right("0"+Hex(Asc(Mid(result,i,1))),2)
next
if hexResult = "effcdf6ae5eb2fa2d27416d5f184df9c259a7c79" then
return true
else
return false
end if

#### Supported Platforms:

- macOS Intel 64 bit
- macOS Apple Silicon
- Windows 32 bit
- Windows 64 bit
- Windows ARM 64 bit
- Linux 32 bit
- Linux 64 bit
- Linux ARM 32 bit
- Linux ARM 64 bit
- iOS