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clarify counter value

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This commit is contained in:
Peter Rounce 2023-09-16 15:26:22 +01:00
parent ae967cc011
commit 46a83398b4
3 changed files with 11 additions and 6 deletions
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10
cli/main.go
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@ -25,9 +25,9 @@ func check_cmac(uid []byte, ctr []byte, k2_cmac_key []byte, cmac []byte) (bool,
sv2[10] = uid[4]
sv2[11] = uid[5]
sv2[12] = uid[6]
sv2[13] = ctr[0]
sv2[13] = ctr[2]
sv2[14] = ctr[1]
sv2[15] = ctr[2]
sv2[15] = ctr[0]
cmac_verified, err := crypto.Aes_cmac(k2_cmac_key, sv2, cmac)
@ -108,7 +108,11 @@ func main() {
}
uid := dec_p[1:8]
ctr := dec_p[8:11]
ctr := make([]byte, 3)
ctr[0] = dec_p[10]
ctr[1] = dec_p[9]
ctr[2] = dec_p[8]
// set up uid & ctr for card record if needed