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Adding XKEK Key Domain creation.

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It validates the membership and creates a XKEK Key Domain. XKEK Key Domains can only be created based on memberships for THAT device. A device can only create XKEK Key Domains with memberships issued for itself.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2022-08-12 19:36:10 +02:00
parent 46cb0a455d
commit 7208d01547
2 changed files with 43 additions and 16 deletions
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1
src/hsm/files.h
View File

@@ -24,6 +24,7 @@
#define EF_DEVOPS 0x100E
#define EF_MKEK 0x100A
#define EF_MKEK_SO 0x100B
#define EF_XKEK 0x1080
#define EF_DKEK 0x1090
#define EF_KEY_DOMAIN 0x10A0
#define EF_PUKAUT 0x10C0

58
src/hsm/sc_hsm.c
View File

@@ -946,12 +946,10 @@ static int cmd_key_domain() {
low_flash_available();
}
else {
//file_t *tf = search_dynamic_file(EF_DKEK+p2);
//if (!tf)
// return SW_INCORRECT_P1P2();
file_t *tf = search_dynamic_file(EF_XKEK+p2);
if (2*p2 >= tf_kd_size)
return SW_INCORRECT_P1P2();
if (current_dkeks == 0xff)
if (current_dkeks == 0xff && !tf) //XKEK have always 0xff)
return SW_REFERENCE_NOT_FOUND();
}
}
@@ -987,7 +985,42 @@ static int cmd_key_domain() {
return SW_OK();
}
else if (p1 == 0x2) {
if (apdu.nc > 0) {
size_t pub_len = 0;
const uint8_t *pub = cvc_get_pub(termca+2, (termca[1] << 8 | termca[0]), &pub_len);
if (!pub)
return SW_EXEC_ERROR();
size_t t86_len = 0;
const uint8_t *t86 = cvc_get_field(pub, pub_len, &t86_len, 0x86);
if (!t86 || t86[0] != 0x4)
return SW_EXEC_ERROR();
size_t t54_len = 0;
const uint8_t *t54 = cvc_get_field(apdu.data, apdu.nc, &t54_len, 0x54);
if (!t54)
return SW_WRONG_DATA();
uint8_t hash[32], *input = (uint8_t *)calloc(1, (t86_len-1)/2+1);
input[0] = 0x54;
memcpy(input+1, t86+1, (t86_len-1)/2);
hash256(input, (t86_len-1)/2+1, hash);
free(input);
int r = puk_verify(t54, t54_len, hash, 32, apdu.data, apdu.nc);
if (r != 0)
return SW_CONDITIONS_NOT_SATISFIED();
file_t *tf = file_new(EF_XKEK+p2);
if (!tf)
return SW_MEMORY_FAILURE();
//All checks done. Get Key Domain UID
pub = cvc_get_pub(apdu.data, apdu.nc, &pub_len);
if (pub) {
size_t t86_len = 0;
const uint8_t *t86 = cvc_get_field(pub, pub_len, &t86_len, 0x86);
if (t86) {
flash_write_data_to_file(tf, t86+1, t86_len-1);
low_flash_available();
}
}
}
}
else
return SW_INCORRECT_P1P2();
@@ -996,17 +1029,10 @@ static int cmd_key_domain() {
res_APDU[1] = dkeks > current_dkeks ? dkeks-current_dkeks : 0;
dkek_kcv(p2, res_APDU+2);
res_APDU_size = 2+8;
if (p1 == 0x2) {
size_t pub_len = 0;
const uint8_t *pub = cvc_get_pub(apdu.data, apdu.nc, &pub_len);
if (pub) {
size_t t86_len = 0;
const uint8_t *t86 = cvc_get_field(pub, pub_len, &t86_len, 0x86);
if (t86) {
memcpy(res_APDU+10, t86+1, t86_len-1);
res_APDU_size += t86_len-1;
}
}
file_t *tf = search_dynamic_file(EF_XKEK+p2);
if (tf) {
memcpy(res_APDU+10, file_get_data(tf), file_get_size(tf));
res_APDU_size += file_get_size(tf);
}
return SW_OK();
}