Hi,
I've been trying to use gcrypt to calculate a MAC using sha256.
It surprises me however, that everytime I run the script a different
value comes int even though I'm using the same key and plain text.
Is there somethigng i'm missing here?
err = gcry_md_open(&ctx,GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
gcry_md_setkey (ctx, key, 32);
gcry_md_write(ctx, &plain_text,sizeof plain_text);
unsigned char *digest = gcry_md_read (ctx, GCRY_MD_SHA256);
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