Header file for tea.cc.
More...
Go to the source code of this file.
|
#define | TEA_ADD_P_THRES 0.05 |
|
#define | TEA_ADD_MAX_PDDT_SIZE (1U << 25) |
|
#define | TEA_NCYCLES 32 |
|
#define | TEA_ADD_TRAILS_LOGFILE "tea-add-trails-nz.log" |
|
#define | TEA_GVIZ_DATFILE "tea-gviz-nz.dat" |
|
|
void | tea_encrypt (uint32_t *v, uint32_t *k, int nrounds) |
|
uint32_t | tea_f (uint32_t x, uint32_t k0, uint32_t k1, uint32_t delta, uint32_t lsh_const, uint32_t rsh_const) |
|
uint32_t | tea_f_i (const uint32_t mask_i, const uint32_t k0, const uint32_t k1, const uint32_t delta, const uint32_t lsh_const, const uint32_t rsh_const, const uint32_t x_in) |
|
void | tea_compute_delta_const (uint32_t D[TEA_NCYCLES]) |
|
double | tea_add_diff_adjust_to_key (const uint64_t npairs, const int round_idx, const uint32_t da, const uint32_t db, const uint32_t key[4]) |
|
double | tea_differential_thres_exper_fk (uint64_t npairs, int r, uint32_t key[4], uint32_t da[2], uint32_t db[2]) |
|
uint32_t | tea_add_verify_trail (uint32_t nrounds, uint32_t npairs, uint32_t key[4], differential_t trail[NROUNDS]) |
|
uint32_t | tea_add_verify_differential (uint32_t nrounds, uint32_t npairs, uint32_t key[4], differential_t trail[NROUNDS]) |
|
void | print_trail_latex (FILE *fp, uint32_t nrounds, uint32_t keys[4], differential_t trail[NROUNDS]) |
|
#define TEA_ADD_MAX_PDDT_SIZE (1U << 25) |
Maximum size of the pDDT for ADD differences.
Cycles in TEA: 1 cycle = 2 rounds.
void print_trail_latex |
( |
FILE * |
fp, |
|
|
uint32_t |
nrounds, |
|
|
uint32_t |
keys[4], |
|
|
differential_t |
trail[NROUNDS] |
|
) |
| |
Print a differential trail in LaTeX-formatted style, suitable to add in a LaTeX document.
- Parameters
-
fp | FILE pointer for writing; opened and closed by the calling function. |
nrounds | number of rounds covered by the trail (NROUNDS). |
keys | cryptographic key of TEA. |
trail | differential trail for nrounds . |
double tea_add_diff_adjust_to_key |
( |
const uint64_t |
npairs, |
|
|
const int |
round_idx, |
|
|
const uint32_t |
da, |
|
|
const uint32_t |
db, |
|
|
const uint32_t |
key[4] |
|
) |
| |
Experimentally adjust the probability of a differential for one round of TEA to a fixed key over a number of chosen plaintexts.
- Parameters
-
npairs | number of chosen plaintext pairs (NPAIRS). |
round_idx | index of the round. |
da | input difference to the TEA F function. |
db | output difference from the TEA F function. |
key | cryptographic key of TEA. |
uint32_t tea_add_verify_differential |
( |
uint32_t |
nrounds, |
|
|
uint32_t |
npairs, |
|
|
uint32_t |
key[4], |
|
|
differential_t |
trail[NROUNDS] |
|
) |
| |
Given an ADD trail for rounds of TEA, experimentally verify the probabilities of the corresponding differentials:
- Differential for 1 round: round 0.
- Differential for 2 rounds: rounds \form#316.
- Differential for 3 rounds: rounds \form#317.
- \form#318
- Differential for \form#315 rounds: rounds \form#319.
- Parameters
-
nrounds | number of rounds covered by the trail (NROUNDS). |
npairs | number of chosen plaintext pairs (NPAIRS). |
key | cryptographic key of TEA. |
trail | differential trail for nrounds . |
uint32_t tea_add_verify_trail |
( |
uint32_t |
nrounds, |
|
|
uint32_t |
npairs, |
|
|
uint32_t |
key[4], |
|
|
differential_t |
trail[NROUNDS] |
|
) |
| |
Experimentally verify the probability of all 1-round differentials from which an N round ADD trail for TEA is composed.
- Parameters
-
nrounds | number of rounds covered by the trail (NROUNDS). |
npairs | number of chosen plaintext pairs (NPAIRS). |
key | cryptographic key of TEA. |
trail | differential trail for nrounds . |
void tea_compute_delta_const |
( |
uint32_t |
D[TEA_NCYCLES] | ) |
|
Compute all round constants of block cipher TEA.
- Parameters
-
D | all round constants of TEA. |
double tea_differential_thres_exper_fk |
( |
uint64_t |
npairs, |
|
|
int |
r, |
|
|
uint32_t |
key[4], |
|
|
uint32_t |
da[2], |
|
|
uint32_t |
db[2] |
|
) |
| |
Experimentally verify the probability of an r
round differential for TEA, for a fixed key, over a number of chosen plaintexts.
- Parameters
-
npairs | number of chosen plaintext pairs (NPAIRS). |
r | number of rounds (1 nrounds 64). |
da | input state to round 1 . |
db | output state after round r . |
key | cryptographic key of TEA. |
void tea_encrypt |
( |
uint32_t * |
v, |
|
|
uint32_t * |
k, |
|
|
int |
nrounds |
|
) |
| |
uint32_t tea_f |
( |
uint32_t |
x, |
|
|
uint32_t |
k0, |
|
|
uint32_t |
k1, |
|
|
uint32_t |
delta, |
|
|
uint32_t |
lsh_const, |
|
|
uint32_t |
rsh_const |
|
) |
| |
uint32_t tea_f_i |
( |
const uint32_t |
mask_i, |
|
|
const uint32_t |
k0, |
|
|
const uint32_t |
k1, |
|
|
const uint32_t |
delta, |
|
|
const uint32_t |
lsh_const, |
|
|
const uint32_t |
rsh_const, |
|
|
const uint32_t |
x_in |
|
) |
| |
The F-function of block cipher TEA (tea_f) computed on the first i
least-significant (LS) bits.
- Parameters
-
mask_i | i bit LSB mask. |
k0 | first round key. |
k1 | second round key. |
delta | round constant. |
lsh_const | LSH constant (default is 4). |
rsh_const | RSH constant (default is 5). |
x_in | input to . |
- Returns
- Attention
- the initial value
x_in
must be minimum (rsh_const
+ 1) bits long so that it can be shifted right by rsh_const
positions.
- See Also
- xtea_f()