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git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5483 818b1a75-f10b-46b9-bf7c-635c3b92a50f
This commit is contained in:
Lionel Gauthier
2014-07-09 16:20:33 +00:00
parent 679df08249
commit 5c0ece4d23
1 changed files with 40 additions and 3 deletions
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openair-cn/NAS/EURECOM-NAS/src/emm/Authentication.c
+40 -3
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@@ -46,6 +46,7 @@ Description Defines the authentication EMM procedure executed by the
#ifdef NAS_UE
#include "usim_api.h"
#include "secu_defs.h"
#endif
#ifdef NAS_MME
@@ -1151,26 +1152,62 @@ static int _authentication_kasme(const OctetString *autn,
memcpy(key + ck->length, ik->value, ik->length);
/* Compute the KDF input parameter
* S = FC(0x10) || SNid || 0x00 0x03 || SQN ⊕ AK || 0x00 0x06
* S = FC(0x10) || SNid(MCC, MNC) || 0x00 0x03 || SQN ⊕ AK || 0x00 0x06
*/
UInt8_t input[kasme->length];
UInt16_t length;
int offset = 0;
int size_of_length = sizeof(length);
// FC
input[offset] = 0x10;
offset += 1;
length = AUTH_SNID_SIZE;
offset += 1;
// P0=SN id
length = AUTH_SNID_SIZE;
memcpy(input + offset, plmn, length);
LOG_TRACE(INFO,"EMM-PROC _authentication_kasme P0 MCC,MNC %02X %02X %02X",
input[offset],
input[offset+1],
input[offset+2]);
offset += length;
// L0=SN id length
memcpy(input + offset, &length, size_of_length);
offset += size_of_length;
// P1=Authentication token
length = AUTH_SQN_SIZE;
memcpy(input + offset, autn, length);
offset += length;
// L1
memcpy(input + offset, &length, size_of_length);
offset += size_of_length;
/* TODO !!! Compute the Kasme key */
// todo_hmac_256(key, input, kasme->value);
kdf(input,
offset,
key,
ck->length + ik->length , /*key_length*/
&kasme->value,
kasme->length);
LOG_TRACE(INFO,"EMM-PROC CK (l=%d)", ck->length);
LOG_TRACE(INFO,"EMM-PROC IK (l=%d)", ik->length);
LOG_TRACE(INFO,"EMM-PROC KASME (l=%d)%02X%02X%02X%02X%02X%02X%02X%02X",
"%02X%02X%02X%02X%02X%02X%02X%02X",
"%02X%02X%02X%02X%02X%02X%02X%02X",
"%02X%02X%02X%02X%02X%02X%02X%02X",
kasme->length,
kasme->value[0],kasme->value[1],kasme->value[2],kasme->value[3],
kasme->value[4],kasme->value[5],kasme->value[6],kasme->value[7],
kasme->value[8],kasme->value[9],kasme->value[10],kasme->value[11],
kasme->value[12],kasme->value[13],kasme->value[14],kasme->value[15],
kasme->value[16],kasme->value[17],kasme->value[18],kasme->value[19],
kasme->value[20],kasme->value[21],kasme->value[22],kasme->value[23],
kasme->value[24],kasme->value[25],kasme->value[26],kasme->value[27],
kasme->value[28],kasme->value[29],kasme->value[30],kasme->value[31]);
LOG_FUNC_RETURN (RETURNok);
}