Hey hackers,
I'm seeing some behavior that confuses me a bit. I'm sure I'm doing
something wrong, but I can't tell.
Here's a minimal example:
/
| #include <stdio.h>
| #include <nettle/rsa.h>
|
| int main ( int argc, char ** argv ) {
| struct sha1_ctx hash_ctx;
| uint8_t headers[] = {
| 0xDE, 0xEA, 0xAD,
| 0xBE, 0xEF
| };
| sha1_update(&hash_ctx, 5, headers);
|
| for (int i = 0; i < 3; ++i) {
| uint8_t _fingerprint[SHA1_DIGEST_SIZE];
| sha1_digest(&hash_ctx, SHA1_DIGEST_SIZE, _fingerprint);
| for (int i = 0; i < SHA1_DIGEST_SIZE; ++i)
| printf("%02X ", _fingerprint[i]);
| printf("\n");
| }
| }
\
The output, when run is:
/
| 89 22 AA 95 F2 02 C9 BB 35 FC 2D A2 DE 22 BE 48 2B B6 6C 1D
| DA 39 A3 EE 5E 6B 4B 0D 32 55 BF EF 95 60 18 90 AF D8 07 09
| DA 39 A3 EE 5E 6B 4B 0D 32 55 BF EF 95 60 18 90 AF D8 07 09
\
(that last line is stable after the inital hash)
Does doing the sha1_digest alter state in some way? I can't image it is, but
then how does this behavior crop up?
Much love, thanks all!
Cheers,
Paul
--
#define sizeof(x) rand()
:wq
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