Hi Adam,
Wei calcualtes a HMAC in test.cpp. Take a quick look at function
HmacFile(...) at line 485. Since you are using a string ('Hi There'),
declare it as a std::string instead of a byte[]. Then use a
StringSource rather than a FileSource.
Jeff
On Thu, Jun 5, 2008 at 7:16 PM, Adam Harding <[EMAIL PROTECTED]> wrote:
>
> Hey there,
>
> I am trying to figure out how to use the message authentication code
> for cryptopp.
>
> Based on reading the FAQ I have come up with this code to try and
> produce a digest for this test vector:
>
> test_case = 1
> key = 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b
> key_len = 16
> data = "Hi There"
> data_len = 8
> digest = 0x9294727a3638bb1c13f48ef8158bfc9d
>
>
> However I have some errors.
>
> It looks simple enough to implement but my programming is pretty
> rubbish so if you could help me out with what needs to be done to get
> an output for a digest that would be great.
>
> Am confused that the digest is needed to be declared as I thought that
> was the result not an input.
>
> Thanks for any help!
>
>
> Here is my code implementing HMAC-SHA1 (similar to the code in the
> FAQ)
>
> #include "sha.h"
> #include "hmac.h"
>
>
> int main()
> {
>
>
> HMAC<SHA >(const byte* key = 0x0b, size_t length= 20)).CalculateDigest
> (byte *digest, const byte *input = "Hi there", size_t length= 64)
>
>
> }
>
> Here is my makefile:
>
> CC=g++
>
> authentication:auth.o hmac.o sha.o
>
> $(CC) auth.o hmac1.o sha.o -o authentication
>
> auth.o: auth.cpp hmac.h sha.h
>
> $(CC) -c auth.cpp
>
> sha.o: sha.cpp sha.h
>
> $(CC) -c sha.cpp
>
> hmac.o: hmac.cpp hmac.h
>
> $(CC) -c hmac.cpp
>
> And here is my error message:
>
> g++ -c auth.cpp
> In file included from sha.h:4,
> from auth.cpp:1:
> iterhash.h: In member function 'void
> CryptoPP::IteratedHashWithStaticTransform<T, B, S,
> M>::vTransform(const T*)':
> ...
> [SNIP]
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