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Commit 7e895aff authored by winckel's avatar winckel
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Added a conversion function for USIM K parameter. 

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4904 818b1a75-f10b-46b9-bf7c-635c3b92a50f
parent bb045248
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Showing with 141 additions and 82 deletions
openair-cn/NAS/EURECOM-NAS/src/api/usim/usim_api.c
View file @ 7e895aff
......@@ -53,12 +53,14 @@ Description Implements the API used by the NAS layer to read/write
*/
#define USIM_API_K_SIZE 16
#define USIM_API_K_VALUE "8BAF473F2F8FD09487CCCBD7097C6862"
static UInt8_t _usim_api_k[USIM_API_K_SIZE];
/*
* List of last used Sequence Numbers SQN
*/
static struct {
static struct _usim_api_data_s {
/* Highest sequence number the USIM has ever accepted */
UInt32_t sqn_ms;
/* List of the last used sequence numbers */
......@@ -67,6 +69,8 @@ static struct {
UInt32_t sqn[USIM_API_SQN_LIST_SIZE];
} _usim_api_data;
static UInt8_t _usim_api_hex_char_to_hex_value (char c);
static void _usim_api_hex_string_to_hex_value (UInt8_t *hex_value, const char *hex_string, int size);
static int _usim_api_check_sqn(UInt32_t seq, UInt8_t ind);
/****************************************************************************/
......@@ -108,7 +112,7 @@ int usim_api_read(usim_data_t* data)
}
/* initialize the subscriber authentication security key */
memcpy(_usim_api_k, USIM_API_K_VALUE, USIM_API_K_SIZE);
_usim_api_hex_string_to_hex_value(_usim_api_k, USIM_API_K_VALUE, USIM_API_K_SIZE);
free(path);
LOG_FUNC_RETURN (RETURNok);
......@@ -176,9 +180,9 @@ int usim_api_write(const usim_data_t* data)
** **
** Outputs: auts: Re-synchronization token **
** res: Authentication response **
** ck: Cipherig key **
** ik: Integrity key **
**
** ck: Ciphering key **
** ik Integrity key **
** **
** Return: RETURNerror, RETURNok **
** Others: None **
** **
......@@ -265,6 +269,61 @@ int usim_api_authenticate(const OctetString* rand, const OctetString* autn,
/********************* L O C A L F U N C T I O N S *********************/
/****************************************************************************/
/****************************************************************************
** **
** Name: _usim_api_hex_char_to_hex_value() **
** **
** Description: Converts an hexadecimal ASCII coded digit into its value. **
** **
** Inputs: c: A char holding the ASCII coded value **
** Others: None **
** **
** Outputs: None **
** Return: Converted value **
** Others: None **
** **
***************************************************************************/
static UInt8_t _usim_api_hex_char_to_hex_value (char c)
{
if (c >= 'A')
{
/* Remove case bit */
c &= ~('a' ^ 'A');
return (c - 'A' + 10);
}
else
{
return (c - '0');
}
}
/****************************************************************************
** **
** Name: _usim_api_hex_string_to_hex_value() **
** **
** Description: Converts an hexadecimal ASCII coded string into its value.**
** **
** Inputs: hex_value: A pointer to the location to store the **
** conversion result **
** size: The size of hex_value in bytes **
** Others: None **
** **
** Outputs: hex_value: Converted value **
** Return: None **
** Others: None **
** **
***************************************************************************/
static void _usim_api_hex_string_to_hex_value (UInt8_t *hex_value, const char *hex_string, int size)
{
int i;
for (i=0; i < size; i++)
{
hex_value[i] = (_usim_api_hex_char_to_hex_value(hex_string[2 * i]) << 4) | _usim_api_hex_char_to_hex_value(hex_string[2 * i + 1]);
}
}
/****************************************************************************
** **
** Name: _usim_api_check_sqn() **
......
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