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test/sm: implement f5

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This commit is contained in:
Matthias Ringwald 2016-05-06 14:15:53 +02:00
parent 587b3d906a
commit 2fde466246
1 changed files with 72 additions and 11 deletions
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83
test/security_manager/aes_cmac_test.c
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@ -4,6 +4,7 @@
#include <string.h>
typedef uint8_t sm_key_t[16];
typedef uint8_t sm_key56_t[7];
typedef uint8_t sm_key256_t[32];
static const char * key_string = "2b7e1516 28aed2a6 abf71588 09cf4f3c";
@ -27,6 +28,16 @@ static const char * f4_x_string = "d5cb8454 d177733e ffffb2ec 712baeab";
static const char * f4_z_string = "00";
static const char * f4_cmac_string = "f2c916f1 07a9bd1c f1eda1be a974872d";
// f5
const char * f5_w_string = "ec0234a3 57c8ad05 341010a6 0a397d9b 99796b13 b4f866f1 868d34f3 73bfa698";
const char * f5_t_string = "3c128f20 de883288 97624bdb 8dac6989";
const char * f5_n1_string = "d5cb8454 d177733e ffffb2ec 712baeab";
const char * f5_n2_string = "a6e8e7cc 25a75f6e 216583f7 ff3dc4cf";
const char * f5_a1_string = "00561237 37bfce";
const char * f5_a2_string = "00a71370 2dcfc1";
const char * f5_cmac_string = "2965f176 a1084a02 fd3f6a20 ce636e20 69867911 69d7cd23 980522b5 94750a38";
static int nibble_for_char(char c){
if (c >= '0' && c <= '9') return c - '0';
if (c >= 'a' && c <= 'f') return c - 'a' + 10;
@ -59,7 +70,7 @@ static void sm_shift_left_by_one_bit_inplace(int len, uint8_t * data){
}
}
void aes128_calc_cyphertext(uint8_t key[16], uint8_t plaintext[16], uint8_t cyphertext[16]){
void aes128_calc_cyphertext(const uint8_t key[16], const uint8_t plaintext[16], uint8_t cyphertext[16]){
uint32_t rk[RKLENGTH(KEYBITS)];
int nrounds = rijndaelSetupEncrypt(rk, &key[0], KEYBITS);
rijndaelEncrypt(rk, nrounds, plaintext, cyphertext);
@ -92,7 +103,7 @@ static void calc_subkeys(sm_key_t k0, sm_key_t k1, sm_key_t k2){
#define VALIDATE_KEY(NAME) { LOG_KEY(NAME); sm_key_t test; parse_hex(test, NAME##_string); if (memcmp(NAME, test, 16)){ printf("Error calculating key\n"); } }
#define VALIDATE_MESSAGE(NAME) validate_message(#NAME, NAME##_string, cmac_##NAME##_string)
static void aes_cmac(sm_key_t aes_cmac, sm_key_t key, uint8_t * data, int sm_cmac_message_len){
static void aes_cmac(sm_key_t aes_cmac, const sm_key_t key, const uint8_t * data, int sm_cmac_message_len){
sm_key_t k0, k1, k2, zero;
memset(zero, 0, 16);
@ -152,15 +163,6 @@ static void aes_cmac(sm_key_t aes_cmac, sm_key_t key, uint8_t * data, int sm_cma
aes128_calc_cyphertext(key, sm_cmac_y, aes_cmac);
}
static void f4(sm_key_t res, sm_key256_t u, sm_key256_t v, sm_key_t x, uint8_t z){
uint8_t buffer[65];
memcpy(buffer, u, 32);
memcpy(buffer+32, v, 32);
buffer[64] = z;
hexdump2(buffer, sizeof(buffer));
aes_cmac(res, x, buffer, sizeof(buffer));
}
static void validate_message(const char * name, const char * message_string, const char * cmac_string){
uint8_t m[128];
@ -186,6 +188,41 @@ static void validate_message(const char * name, const char * message_string, con
}
}
static void f4(sm_key_t res, const sm_key256_t u, const sm_key256_t v, const sm_key_t x, uint8_t z){
uint8_t buffer[65];
memcpy(buffer, u, 32);
memcpy(buffer+32, v, 32);
buffer[64] = z;
// hexdump2(buffer, sizeof(buffer));
aes_cmac(res, x, buffer, sizeof(buffer));
}
const sm_key_t f5_salt = { 0x6C ,0x88, 0x83, 0x91, 0xAA, 0xF5, 0xA5, 0x38, 0x60, 0x37, 0x0B, 0xDB, 0x5A, 0x60, 0x83, 0xBE};
const uint8_t f5_key_id[] = { 0x62, 0x74, 0x6c, 0x65 };
const uint8_t f5_length[] = { 0x01, 0x00};
static void f5(sm_key256_t res, const sm_key256_t w, const sm_key_t n1, const sm_key_t n2, const sm_key56_t a1, const sm_key56_t a2){
// T = AES-CMACSAL_T(W)
sm_key_t t;
aes_cmac(t, f5_salt, w, 32);
// f5(W, N1, N2, A1, A2) = AES-CMACT (Counter = 0 || keyID || N1 || N2|| A1|| A2 || Length = 256) -- this is the MacKey
uint8_t buffer[53];
buffer[0] = 0;
memcpy(buffer+01, f5_key_id, 4);
memcpy(buffer+05, n1, 16);
memcpy(buffer+21, n2, 16);
memcpy(buffer+37, a1, 7);
memcpy(buffer+44, a2, 7);
memcpy(buffer+51, f5_length, 2);
// hexdump2(buffer, sizeof(buffer));
aes_cmac(res, t, buffer, sizeof(buffer));
// hexdump2(res, 16);
// || AES-CMACT (Counter = 1 || keyID || N1 || N2|| A1|| A2 || Length = 256) -- this is the LTK
buffer[0] = 1;
// hexdump2(buffer, sizeof(buffer));
aes_cmac(res+16, t, buffer, sizeof(buffer));
// hexdump2(res+16, 16);
}
int main(void){
sm_key_t key, k0, k1, k2, zero;
memset(zero, 0, 16);
@ -220,4 +257,28 @@ int main(void){
} else {
printf("CMAC correct!\n");
}
// valdiate f5
printf("-- verify f5\n");
sm_key_t f5_cmac, f5_mackey, f5_n1, f5_n2;
sm_key56_t f5_a1, f5_a2;
sm_key256_t f5_w, f5_res;
uint8_t f5_z;
parse_hex(f5_w, f5_w_string);
parse_hex(f5_n1, f5_n1_string);
parse_hex(f5_n2, f5_n2_string);
parse_hex(f5_a1, f5_a1_string);
parse_hex(f5_a2, f5_a2_string);
f5(f5_res, f5_w, f5_n1, f5_n2, f5_a1, f5_a2);
printf("MacKey:");
hexdump2(f5_res, 16);
printf("LTK: ");
hexdump2(f5_res+16, 16);
parse_hex(f5_cmac, f5_cmac_string);
if (memcmp(f5_res, f5_cmac, 16)){
printf("CMAC incorrect!\n");
} else {
printf("CMAC correct!\n");
}
}