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Código Questões Pedidos de integração Lançamentos Wiki Trabalho

move implementations of functions to .c files

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Este cometimento está contido em:
Leon 2019-06-11 22:50:33 +02:00
ascendente 9e3f973f56
cometimento 6811a40527
21 ficheiros modificados com 396 adições e 388 eliminações
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8
crypto_kem/ledakemlt12/clean/bf_decoding.c
Ver ficheiro

@ -18,13 +18,13 @@ int PQCLEAN_LEDAKEMLT12_CLEAN_bf_decoding(DIGIT err[],
int iteration = 0;
do {
gf2x_copy(currSyndrome, privateSyndrome);
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_copy(currSyndrome, privateSyndrome);
memset(unsatParityChecks, 0x00, N0 * P * sizeof(uint8_t));
for (int i = 0; i < N0; i++) {
for (int valueIdx = 0; valueIdx < P; valueIdx++) {
for (int HtrOneIdx = 0; HtrOneIdx < DV; HtrOneIdx++) {
POSITION_T tmp = (HtrPosOnes[i][HtrOneIdx] + valueIdx) >= P ? (HtrPosOnes[i][HtrOneIdx] + valueIdx) - P : (HtrPosOnes[i][HtrOneIdx] + valueIdx);
if (gf2x_get_coeff(currSyndrome, tmp)) {
if (PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_get_coeff(currSyndrome, tmp)) {
unsatParityChecks[i * P + valueIdx]++;
}
}
@ -54,13 +54,13 @@ int PQCLEAN_LEDAKEMLT12_CLEAN_bf_decoding(DIGIT err[],
}
/* Correlation based flipping */
if (correlation >= corrt_syndrome_based) {
gf2x_toggle_coeff(err + NUM_DIGITS_GF2X_ELEMENT * i, j);
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_toggle_coeff(err + NUM_DIGITS_GF2X_ELEMENT * i, j);
for (int v = 0; v < M; v++) {
unsigned syndromePosToFlip;
for (int HtrOneIdx = 0; HtrOneIdx < DV; HtrOneIdx++) {
syndromePosToFlip = (HtrPosOnes[currQBlkPos[v]][HtrOneIdx] + currQBitPos[v] );
syndromePosToFlip = syndromePosToFlip >= P ? syndromePosToFlip - P : syndromePosToFlip;
gf2x_toggle_coeff(privateSyndrome, syndromePosToFlip);
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_toggle_coeff(privateSyndrome, syndromePosToFlip);
}
} // end for v
} // end if

4
crypto_kem/ledakemlt12/clean/dfr_test.c
Ver ficheiro

@ -38,7 +38,7 @@ int PQCLEAN_LEDAKEMLT12_CLEAN_DFR_test(POSITION_T LSparse[N0][DV * M]) {
LSparse_loc[i][j] = (P - LSparse[i][j]);
}
}
quicksort_sparse(LSparse_loc[i]);
PQCLEAN_LEDAKEMLT12_CLEAN_quicksort_sparse(LSparse_loc[i]);
}
for (int i = 0; i < N0; i++ ) {
@ -48,7 +48,7 @@ int PQCLEAN_LEDAKEMLT12_CLEAN_DFR_test(POSITION_T LSparse[N0][DV * M]) {
for (int idxToRotate = 0; idxToRotate < (DV * M); idxToRotate++) {
rotated_column[idxToRotate] = (LSparse_loc[j][idxToRotate] + k) % P;
}
quicksort_sparse(rotated_column);
PQCLEAN_LEDAKEMLT12_CLEAN_quicksort_sparse(rotated_column);
/* compute the intersection amount */
firstidx = 0, secondidx = 0;
intersectionval = 0;

6
crypto_kem/ledakemlt12/clean/gf2x_arith.c
Ver ficheiro

@ -3,6 +3,12 @@
#include <assert.h>
#include <string.h> // memset(...)
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_add(DIGIT Res[], const DIGIT A[], const DIGIT B[], int nr) {
for (int i = 0; i < nr; i++) {
Res[i] = A[i] ^ B[i];
}
}
/* PRE: MAX ALLOWED ROTATION AMOUNT : DIGIT_SIZE_b */
void PQCLEAN_LEDAKEMLT12_CLEAN_right_bit_shift_n(int length, DIGIT in[], unsigned int amount) {
assert(amount < DIGIT_SIZE_b);

7
crypto_kem/ledakemlt12/clean/gf2x_arith.h
Ver ficheiro

@ -50,12 +50,7 @@ typedef uint64_t DIGIT;
#define GF2X_MUL PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mul_comb
static inline void gf2x_add(DIGIT Res[], const DIGIT A[], const DIGIT B[], int nr) {
for (int i = 0; i < nr; i++) {
Res[i] = A[i] ^ B[i];
}
}
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_add(DIGIT Res[], const DIGIT A[], const DIGIT B[], int nr);
void PQCLEAN_LEDAKEMLT12_CLEAN_right_bit_shift_n(int length, DIGIT in[], unsigned int amount);
void PQCLEAN_LEDAKEMLT12_CLEAN_left_bit_shift_n(int length, DIGIT in[], unsigned int amount);
void GF2X_MUL(int nr, DIGIT Res[], int na, const DIGIT A[], int nb, const DIGIT B[]);

125
crypto_kem/ledakemlt12/clean/gf2x_arith_mod_xPplusOne.c
Ver ficheiro

@ -4,6 +4,103 @@
#include <assert.h>
#include <string.h> // memcpy(...), memset(...)
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_copy(DIGIT dest[], const DIGIT in[]) {
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
dest[i] = in[i];
}
}
/* returns the coefficient of the x^exponent term as the LSB of a digit */
DIGIT PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_get_coeff(const DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
return (poly[digitIdx] >> (DIGIT_SIZE_b - 1 - inDigitIdx)) & ((DIGIT) 1) ;
}
/* sets the coefficient of the x^exponent term as the LSB of a digit */
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_set_coeff(DIGIT poly[], unsigned int exponent, DIGIT value) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ~( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] & mask;
poly[digitIdx] = poly[digitIdx] | (( value & ((DIGIT) 1)) << (DIGIT_SIZE_b - 1 - inDigitIdx));
}
/* toggles (flips) the coefficient of the x^exponent term as the LSB of a digit */
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_toggle_coeff(DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] ^ mask;
}
/* population count for an unsigned 64-bit integer
Source: Hacker's delight, p.66 */
static int popcount_uint64t(uint64_t x) {
x -= (x >> 1) & 0x5555555555555555;
x = (x & 0x3333333333333333) + ((x >> 2) & 0x3333333333333333);
x = (x + (x >> 4)) & 0x0f0f0f0f0f0f0f0f;
return (int)((x * 0x0101010101010101) >> 56);
}
/* population count for a single polynomial */
int PQCLEAN_LEDAKEMLT12_CLEAN_population_count(DIGIT *poly) {
int ret = 0;
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
ret += popcount_uint64t(poly[i]);
}
return ret;
}
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_add(DIGIT Res[], const DIGIT A[], const DIGIT B[]) {
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_add(Res, A, B, NUM_DIGITS_GF2X_ELEMENT);
}
static int partition(POSITION_T arr[], int lo, int hi) {
POSITION_T x = arr[hi];
POSITION_T tmp;
int i = (lo - 1);
for (int j = lo; j <= hi - 1; j++) {
if (arr[j] <= x) {
i++;
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
}
tmp = arr[i + 1];
arr[i + 1] = arr[hi];
arr[hi] = tmp;
return i + 1;
}
void PQCLEAN_LEDAKEMLT12_CLEAN_quicksort_sparse(POSITION_T Res[]) {
int stack[DV * M];
int hi, lo, pivot, tos = -1;
stack[++tos] = 0;
stack[++tos] = (DV * M) - 1;
while (tos >= 0 ) {
hi = stack[tos--];
lo = stack[tos--];
pivot = partition(Res, lo, hi);
if ( (pivot - 1) > lo) {
stack[++tos] = lo;
stack[++tos] = pivot - 1;
}
if ( (pivot + 1) < hi) {
stack[++tos] = pivot + 1;
stack[++tos] = hi;
}
}
}
static void gf2x_mod(DIGIT out[], const DIGIT in[]) {
@ -65,7 +162,7 @@ static void right_bit_shift(unsigned int length, DIGIT in[]) {
/* shifts by whole digits */
static inline void left_DIGIT_shift_n(unsigned int length, DIGIT in[], unsigned int amount) {
static void left_DIGIT_shift_n(unsigned int length, DIGIT in[], unsigned int amount) {
unsigned int j;
for (j = 0; (j + amount) < length; j++) {
in[j] = in[j + amount];
@ -75,7 +172,6 @@ static inline void left_DIGIT_shift_n(unsigned int length, DIGIT in[], unsigned
}
}
/* may shift by an arbitrary amount*/
static void left_bit_shift_wide_n(const int length, DIGIT in[], unsigned int amount) {
left_DIGIT_shift_n(length, in, amount / DIGIT_SIZE_b);
@ -115,7 +211,7 @@ void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_transpose_in_place(DIGIT A[]) {
A[NUM_DIGITS_GF2X_ELEMENT - 1 - i] = rev1;
}
A[NUM_DIGITS_GF2X_ELEMENT / 2] = reverse_digit(A[NUM_DIGITS_GF2X_ELEMENT / 2]); // reverse middle digit
A[NUM_DIGITS_GF2X_ELEMENT / 2] = reverse_digit(A[NUM_DIGITS_GF2X_ELEMENT / 2]);
if (slack_bits_amount) {
PQCLEAN_LEDAKEMLT12_CLEAN_right_bit_shift_n(NUM_DIGITS_GF2X_ELEMENT, A, slack_bits_amount);
@ -143,9 +239,7 @@ static void rotate_bit_right(DIGIT in[]) { /* x^{-1} * in(x) mod x^P+1 */
in[0] |= rotated_bit;
}
static void gf2x_swap(const int length,
DIGIT f[],
DIGIT s[]) {
static void gf2x_swap(const int length, DIGIT f[], DIGIT s[]) {
DIGIT t;
for (int i = length - 1; i >= 0; i--) {
t = f[i];
@ -174,7 +268,7 @@ static void gf2x_swap(const int length,
int PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_inverse(DIGIT out[], const DIGIT in[]) { /* in^{-1} mod x^P-1 */
int i;
long int delta = 0;
int delta = 0;
DIGIT u[NUM_DIGITS_GF2X_ELEMENT] = {0};
DIGIT v[NUM_DIGITS_GF2X_ELEMENT] = {0};
DIGIT s[NUM_DIGITS_GF2X_MODULUS] = {0};
@ -205,8 +299,8 @@ int PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_inverse(DIGIT out[], const DIGIT in[]) {
delta += 1;
} else {
if ( (s[0] & mask) != 0) {
gf2x_add(s, s, f, NUM_DIGITS_GF2X_MODULUS);
gf2x_mod_add(v, v, u);
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_add(s, s, f, NUM_DIGITS_GF2X_MODULUS);
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_add(v, v, u);
}
left_bit_shift(NUM_DIGITS_GF2X_MODULUS, s);
if ( delta == 0 ) {
@ -258,7 +352,7 @@ void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_mul_dense_to_sparse(
for (unsigned int i = 1; i < nPos; i++) {
if (sparse[i] != INVALID_POS_VALUE) {
left_bit_shift_wide_n(2 * NUM_DIGITS_GF2X_ELEMENT, aux, (sparse[i] - sparse[i - 1]) );
gf2x_add(resDouble, aux, resDouble, 2 * NUM_DIGITS_GF2X_ELEMENT);
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_add(resDouble, aux, resDouble, 2 * NUM_DIGITS_GF2X_ELEMENT);
}
}
}
@ -312,7 +406,7 @@ void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_mul_sparse(size_t sizeR, POSITION_T Res[
Res[lastFilledPos] = INVALID_POS_VALUE;
lastFilledPos++;
}
quicksort_sparse(Res);
PQCLEAN_LEDAKEMLT12_CLEAN_quicksort_sparse(Res);
/* eliminate duplicates */
POSITION_T lastReadPos = Res[0];
int duplicateCount;
@ -438,8 +532,9 @@ void PQCLEAN_LEDAKEMLT12_CLEAN_rand_circulant_sparse_block(POSITION_T *pos_ones,
}
/* Returns random weight-t circulant block */
void PQCLEAN_LEDAKEMLT12_CLEAN_rand_circulant_blocks_sequence(DIGIT sequence[N0 * NUM_DIGITS_GF2X_ELEMENT],
AES_XOF_struct *seed_expander_ctx) {
void PQCLEAN_LEDAKEMLT12_CLEAN_rand_circulant_blocks_sequence(
DIGIT sequence[N0 * NUM_DIGITS_GF2X_ELEMENT],
AES_XOF_struct *seed_expander_ctx) {
int rndPos[NUM_ERRORS_T], duplicated, counter = 0;
int p, polyIndex, exponent;
@ -463,8 +558,8 @@ void PQCLEAN_LEDAKEMLT12_CLEAN_rand_circulant_blocks_sequence(DIGIT sequence[N0
for (int j = 0; j < counter; j++) {
polyIndex = rndPos[j] / P;
exponent = rndPos[j] % P;
gf2x_set_coeff( sequence + NUM_DIGITS_GF2X_ELEMENT * polyIndex, exponent,
( (DIGIT) 1));
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_set_coeff( sequence + NUM_DIGITS_GF2X_ELEMENT * polyIndex, exponent,
( (DIGIT) 1));
}
}

107
crypto_kem/ledakemlt12/clean/gf2x_arith_mod_xPplusOne.h
Ver ficheiro

@ -15,105 +15,13 @@
#define INVALID_POS_VALUE (P)
#define P_BITS (16) // log_2(p) = 15.6703
static inline void gf2x_copy(DIGIT dest[], const DIGIT in[]) {
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
dest[i] = in[i];
}
}
/* returns the coefficient of the x^exponent term as the LSB of a digit */
static inline DIGIT gf2x_get_coeff(const DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
return (poly[digitIdx] >> (DIGIT_SIZE_b - 1 - inDigitIdx)) & ((DIGIT) 1) ;
}
/* sets the coefficient of the x^exponent term as the LSB of a digit */
static inline void gf2x_set_coeff(DIGIT poly[], unsigned int exponent, DIGIT value) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ~( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] & mask;
poly[digitIdx] = poly[digitIdx] | (( value & ((DIGIT) 1)) << (DIGIT_SIZE_b - 1 - inDigitIdx));
}
/* toggles (flips) the coefficient of the x^exponent term as the LSB of a digit */
static inline void gf2x_toggle_coeff(DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] ^ mask;
}
/* population count for an unsigned 64-bit integer
Source: Hacker's delight, p.66 */
static int popcount_uint64t(uint64_t x) {
x -= (x >> 1) & 0x5555555555555555;
x = (x & 0x3333333333333333) + ((x >> 2) & 0x3333333333333333);
x = (x + (x >> 4)) & 0x0f0f0f0f0f0f0f0f;
return (int)((x * 0x0101010101010101) >> 56);
}
/* population count for a single polynomial */
static inline int population_count(DIGIT *poly) {
int ret = 0;
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
ret += popcount_uint64t(poly[i]);
}
return ret;
}
static inline void gf2x_mod_add(DIGIT Res[], const DIGIT A[], const DIGIT B[]) {
gf2x_add(Res, A, B, NUM_DIGITS_GF2X_ELEMENT);
}
static inline int partition(POSITION_T arr[], int lo, int hi) {
POSITION_T x = arr[hi];
POSITION_T tmp;
int i = (lo - 1);
for (int j = lo; j <= hi - 1; j++) {
if (arr[j] <= x) {
i++;
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
}
tmp = arr[i + 1];
arr[i + 1] = arr[hi];
arr[hi] = tmp;
return i + 1;
}
static inline void quicksort_sparse(POSITION_T Res[]) {
int stack[DV * M];
int hi, lo, pivot, tos = -1;
stack[++tos] = 0;
stack[++tos] = (DV * M) - 1;
while (tos >= 0 ) {
hi = stack[tos--];
lo = stack[tos--];
pivot = partition(Res, lo, hi);
if ( (pivot - 1) > lo) {
stack[++tos] = lo;
stack[++tos] = pivot - 1;
}
if ( (pivot + 1) < hi) {
stack[++tos] = pivot + 1;
stack[++tos] = hi;
}
}
}
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_copy(DIGIT dest[], const DIGIT in[]);
DIGIT PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_get_coeff(const DIGIT poly[], unsigned int exponent);
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_set_coeff(DIGIT poly[], unsigned int exponent, DIGIT value);
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_toggle_coeff(DIGIT poly[], unsigned int exponent);
int PQCLEAN_LEDAKEMLT12_CLEAN_population_count(DIGIT *poly);
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_add(DIGIT Res[], const DIGIT A[], const DIGIT B[]);
void PQCLEAN_LEDAKEMLT12_CLEAN_quicksort_sparse(POSITION_T Res[]);
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_mul(DIGIT Res[], const DIGIT A[], const DIGIT B[]);
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_transpose_in_place(DIGIT A[]);
void PQCLEAN_LEDAKEMLT12_CLEAN_rand_circulant_sparse_block(POSITION_T *pos_ones, int countOnes, AES_XOF_struct *seed_expander_ctx);
@ -123,7 +31,6 @@ void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_transpose_in_place_sparse(int sizeA, POSITIO
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_mul_sparse(size_t sizeR, POSITION_T Res[], size_t sizeA, const POSITION_T A[], size_t sizeB, const POSITION_T B[]);
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_mul_dense_to_sparse(DIGIT Res[], const DIGIT dense[], POSITION_T sparse[], unsigned int nPos);
void PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_tobytes(uint8_t *bytes, const DIGIT *poly);
int PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_inverse(DIGIT out[], const DIGIT in[]);
#endif

8
crypto_kem/ledakemlt12/clean/niederreiter.c
Ver ficheiro

@ -58,7 +58,7 @@ void PQCLEAN_LEDAKEMLT12_CLEAN_niederreiter_keygen(publicKeyNiederreiter_t *pk,
memset(Ln0dense, 0x00, sizeof(Ln0dense));
for (int j = 0; j < DV * M; j++) {
if (LPosOnes[N0 - 1][j] != INVALID_POS_VALUE) {
gf2x_set_coeff(Ln0dense, LPosOnes[N0 - 1][j], 1);
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_set_coeff(Ln0dense, LPosOnes[N0 - 1][j], 1);
}
}
@ -86,9 +86,9 @@ void PQCLEAN_LEDAKEMLT12_CLEAN_niederreiter_encrypt(DIGIT *syndrome, const publi
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_mul(saux,
pk->Mtr + i * NUM_DIGITS_GF2X_ELEMENT,
err + i * NUM_DIGITS_GF2X_ELEMENT);
gf2x_mod_add(syndrome, syndrome, saux);
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_add(syndrome, syndrome, saux);
}
gf2x_mod_add(syndrome, syndrome, err + (N0 - 1)*NUM_DIGITS_GF2X_ELEMENT);
PQCLEAN_LEDAKEMLT12_CLEAN_gf2x_mod_add(syndrome, syndrome, err + (N0 - 1)*NUM_DIGITS_GF2X_ELEMENT);
}
@ -180,7 +180,7 @@ int PQCLEAN_LEDAKEMLT12_CLEAN_niederreiter_decrypt(DIGIT *err, const privateKeyN
err_weight = 0;
for (int i = 0 ; i < N0; i++) {
err_weight += population_count(err + (NUM_DIGITS_GF2X_ELEMENT * i));
err_weight += PQCLEAN_LEDAKEMLT12_CLEAN_population_count(err + (NUM_DIGITS_GF2X_ELEMENT * i));
}
decryptOk = decryptOk && (err_weight == NUM_ERRORS_T);

8
crypto_kem/ledakemlt32/clean/bf_decoding.c
Ver ficheiro

@ -18,13 +18,13 @@ int PQCLEAN_LEDAKEMLT32_CLEAN_bf_decoding(DIGIT err[],
int iteration = 0;
do {
gf2x_copy(currSyndrome, privateSyndrome);
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_copy(currSyndrome, privateSyndrome);
memset(unsatParityChecks, 0x00, N0 * P * sizeof(uint8_t));
for (int i = 0; i < N0; i++) {
for (int valueIdx = 0; valueIdx < P; valueIdx++) {
for (int HtrOneIdx = 0; HtrOneIdx < DV; HtrOneIdx++) {
POSITION_T tmp = (HtrPosOnes[i][HtrOneIdx] + valueIdx) >= P ? (HtrPosOnes[i][HtrOneIdx] + valueIdx) - P : (HtrPosOnes[i][HtrOneIdx] + valueIdx);
if (gf2x_get_coeff(currSyndrome, tmp)) {
if (PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_get_coeff(currSyndrome, tmp)) {
unsatParityChecks[i * P + valueIdx]++;
}
}
@ -54,13 +54,13 @@ int PQCLEAN_LEDAKEMLT32_CLEAN_bf_decoding(DIGIT err[],
}
/* Correlation based flipping */
if (correlation >= corrt_syndrome_based) {
gf2x_toggle_coeff(err + NUM_DIGITS_GF2X_ELEMENT * i, j);
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_toggle_coeff(err + NUM_DIGITS_GF2X_ELEMENT * i, j);
for (int v = 0; v < M; v++) {
unsigned syndromePosToFlip;
for (int HtrOneIdx = 0; HtrOneIdx < DV; HtrOneIdx++) {
syndromePosToFlip = (HtrPosOnes[currQBlkPos[v]][HtrOneIdx] + currQBitPos[v] );
syndromePosToFlip = syndromePosToFlip >= P ? syndromePosToFlip - P : syndromePosToFlip;
gf2x_toggle_coeff(privateSyndrome, syndromePosToFlip);
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_toggle_coeff(privateSyndrome, syndromePosToFlip);
}
} // end for v
} // end if

4
crypto_kem/ledakemlt32/clean/dfr_test.c
Ver ficheiro

@ -38,7 +38,7 @@ int PQCLEAN_LEDAKEMLT32_CLEAN_DFR_test(POSITION_T LSparse[N0][DV * M]) {
LSparse_loc[i][j] = (P - LSparse[i][j]);
}
}
quicksort_sparse(LSparse_loc[i]);
PQCLEAN_LEDAKEMLT32_CLEAN_quicksort_sparse(LSparse_loc[i]);
}
for (int i = 0; i < N0; i++ ) {
@ -48,7 +48,7 @@ int PQCLEAN_LEDAKEMLT32_CLEAN_DFR_test(POSITION_T LSparse[N0][DV * M]) {
for (int idxToRotate = 0; idxToRotate < (DV * M); idxToRotate++) {
rotated_column[idxToRotate] = (LSparse_loc[j][idxToRotate] + k) % P;
}
quicksort_sparse(rotated_column);
PQCLEAN_LEDAKEMLT32_CLEAN_quicksort_sparse(rotated_column);
/* compute the intersection amount */
firstidx = 0, secondidx = 0;
intersectionval = 0;

6
crypto_kem/ledakemlt32/clean/gf2x_arith.c
Ver ficheiro

@ -3,6 +3,12 @@
#include <assert.h>
#include <string.h> // memset(...)
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_add(DIGIT Res[], const DIGIT A[], const DIGIT B[], int nr) {
for (int i = 0; i < nr; i++) {
Res[i] = A[i] ^ B[i];
}
}
/* PRE: MAX ALLOWED ROTATION AMOUNT : DIGIT_SIZE_b */
void PQCLEAN_LEDAKEMLT32_CLEAN_right_bit_shift_n(int length, DIGIT in[], unsigned int amount) {
assert(amount < DIGIT_SIZE_b);

7
crypto_kem/ledakemlt32/clean/gf2x_arith.h
Ver ficheiro

@ -50,12 +50,7 @@ typedef uint64_t DIGIT;
#define GF2X_MUL PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mul_comb
static inline void gf2x_add(DIGIT Res[], const DIGIT A[], const DIGIT B[], int nr) {
for (int i = 0; i < nr; i++) {
Res[i] = A[i] ^ B[i];
}
}
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_add(DIGIT Res[], const DIGIT A[], const DIGIT B[], int nr);
void PQCLEAN_LEDAKEMLT32_CLEAN_right_bit_shift_n(int length, DIGIT in[], unsigned int amount);
void PQCLEAN_LEDAKEMLT32_CLEAN_left_bit_shift_n(int length, DIGIT in[], unsigned int amount);
void GF2X_MUL(int nr, DIGIT Res[], int na, const DIGIT A[], int nb, const DIGIT B[]);

120
crypto_kem/ledakemlt32/clean/gf2x_arith_mod_xPplusOne.c
Ver ficheiro

@ -4,6 +4,103 @@
#include <assert.h>
#include <string.h> // memcpy(...), memset(...)
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_copy(DIGIT dest[], const DIGIT in[]) {
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
dest[i] = in[i];
}
}
/* returns the coefficient of the x^exponent term as the LSB of a digit */
DIGIT PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_get_coeff(const DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
return (poly[digitIdx] >> (DIGIT_SIZE_b - 1 - inDigitIdx)) & ((DIGIT) 1) ;
}
/* sets the coefficient of the x^exponent term as the LSB of a digit */
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_set_coeff(DIGIT poly[], unsigned int exponent, DIGIT value) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ~( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] & mask;
poly[digitIdx] = poly[digitIdx] | (( value & ((DIGIT) 1)) << (DIGIT_SIZE_b - 1 - inDigitIdx));
}
/* toggles (flips) the coefficient of the x^exponent term as the LSB of a digit */
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_toggle_coeff(DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] ^ mask;
}
/* population count for an unsigned 64-bit integer
Source: Hacker's delight, p.66 */
static int popcount_uint64t(uint64_t x) {
x -= (x >> 1) & 0x5555555555555555;
x = (x & 0x3333333333333333) + ((x >> 2) & 0x3333333333333333);
x = (x + (x >> 4)) & 0x0f0f0f0f0f0f0f0f;
return (int)((x * 0x0101010101010101) >> 56);
}
/* population count for a single polynomial */
int PQCLEAN_LEDAKEMLT32_CLEAN_population_count(DIGIT *poly) {
int ret = 0;
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
ret += popcount_uint64t(poly[i]);
}
return ret;
}
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_add(DIGIT Res[], const DIGIT A[], const DIGIT B[]) {
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_add(Res, A, B, NUM_DIGITS_GF2X_ELEMENT);
}
static int partition(POSITION_T arr[], int lo, int hi) {
POSITION_T x = arr[hi];
POSITION_T tmp;
int i = (lo - 1);
for (int j = lo; j <= hi - 1; j++) {
if (arr[j] <= x) {
i++;
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
}
tmp = arr[i + 1];
arr[i + 1] = arr[hi];
arr[hi] = tmp;
return i + 1;
}
void PQCLEAN_LEDAKEMLT32_CLEAN_quicksort_sparse(POSITION_T Res[]) {
int stack[DV * M];
int hi, lo, pivot, tos = -1;
stack[++tos] = 0;
stack[++tos] = (DV * M) - 1;
while (tos >= 0 ) {
hi = stack[tos--];
lo = stack[tos--];
pivot = partition(Res, lo, hi);
if ( (pivot - 1) > lo) {
stack[++tos] = lo;
stack[++tos] = pivot - 1;
}
if ( (pivot + 1) < hi) {
stack[++tos] = pivot + 1;
stack[++tos] = hi;
}
}
}
static void gf2x_mod(DIGIT out[], const DIGIT in[]) {
@ -65,7 +162,7 @@ static void right_bit_shift(unsigned int length, DIGIT in[]) {
/* shifts by whole digits */
static inline void left_DIGIT_shift_n(unsigned int length, DIGIT in[], unsigned int amount) {
static void left_DIGIT_shift_n(unsigned int length, DIGIT in[], unsigned int amount) {
unsigned int j;
for (j = 0; (j + amount) < length; j++) {
in[j] = in[j + amount];
@ -75,7 +172,6 @@ static inline void left_DIGIT_shift_n(unsigned int length, DIGIT in[], unsigned
}
}
/* may shift by an arbitrary amount*/
static void left_bit_shift_wide_n(const int length, DIGIT in[], unsigned int amount) {
left_DIGIT_shift_n(length, in, amount / DIGIT_SIZE_b);
@ -115,7 +211,7 @@ void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_transpose_in_place(DIGIT A[]) {
A[NUM_DIGITS_GF2X_ELEMENT - 1 - i] = rev1;
}
// A[NUM_DIGITS_GF2X_ELEMENT / 2] = reverse_digit(A[NUM_DIGITS_GF2X_ELEMENT / 2]); // reverse middle digit
// A[NUM_DIGITS_GF2X_ELEMENT / 2] = reverse_digit(A[NUM_DIGITS_GF2X_ELEMENT / 2]); // no middle digit
if (slack_bits_amount) {
PQCLEAN_LEDAKEMLT32_CLEAN_right_bit_shift_n(NUM_DIGITS_GF2X_ELEMENT, A, slack_bits_amount);
@ -143,9 +239,7 @@ static void rotate_bit_right(DIGIT in[]) { /* x^{-1} * in(x) mod x^P+1 */
in[0] |= rotated_bit;
}
static void gf2x_swap(const int length,
DIGIT f[],
DIGIT s[]) {
static void gf2x_swap(const int length, DIGIT f[], DIGIT s[]) {
DIGIT t;
for (int i = length - 1; i >= 0; i--) {
t = f[i];
@ -174,7 +268,7 @@ static void gf2x_swap(const int length,
int PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_inverse(DIGIT out[], const DIGIT in[]) { /* in^{-1} mod x^P-1 */
int i;
long int delta = 0;
int delta = 0;
DIGIT u[NUM_DIGITS_GF2X_ELEMENT] = {0};
DIGIT v[NUM_DIGITS_GF2X_ELEMENT] = {0};
DIGIT s[NUM_DIGITS_GF2X_MODULUS] = {0};
@ -205,8 +299,8 @@ int PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_inverse(DIGIT out[], const DIGIT in[]) {
delta += 1;
} else {
if ( (s[0] & mask) != 0) {
gf2x_add(s, s, f, NUM_DIGITS_GF2X_MODULUS);
gf2x_mod_add(v, v, u);
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_add(s, s, f, NUM_DIGITS_GF2X_MODULUS);
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_add(v, v, u);
}
left_bit_shift(NUM_DIGITS_GF2X_MODULUS, s);
if ( delta == 0 ) {
@ -258,7 +352,7 @@ void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_mul_dense_to_sparse(
for (unsigned int i = 1; i < nPos; i++) {
if (sparse[i] != INVALID_POS_VALUE) {
left_bit_shift_wide_n(2 * NUM_DIGITS_GF2X_ELEMENT, aux, (sparse[i] - sparse[i - 1]) );
gf2x_add(resDouble, aux, resDouble, 2 * NUM_DIGITS_GF2X_ELEMENT);
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_add(resDouble, aux, resDouble, 2 * NUM_DIGITS_GF2X_ELEMENT);
}
}
}
@ -312,7 +406,7 @@ void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_mul_sparse(size_t sizeR, POSITION_T Res[
Res[lastFilledPos] = INVALID_POS_VALUE;
lastFilledPos++;
}
quicksort_sparse(Res);
PQCLEAN_LEDAKEMLT32_CLEAN_quicksort_sparse(Res);
/* eliminate duplicates */
POSITION_T lastReadPos = Res[0];
int duplicateCount;
@ -464,8 +558,8 @@ void PQCLEAN_LEDAKEMLT32_CLEAN_rand_circulant_blocks_sequence(
for (int j = 0; j < counter; j++) {
polyIndex = rndPos[j] / P;
exponent = rndPos[j] % P;
gf2x_set_coeff( sequence + NUM_DIGITS_GF2X_ELEMENT * polyIndex, exponent,
( (DIGIT) 1));
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_set_coeff( sequence + NUM_DIGITS_GF2X_ELEMENT * polyIndex, exponent,
( (DIGIT) 1));
}
}

107
crypto_kem/ledakemlt32/clean/gf2x_arith_mod_xPplusOne.h
Ver ficheiro

@ -15,105 +15,13 @@
#define INVALID_POS_VALUE (P)
#define P_BITS (17) // log_2(p) = 16.55406417
static inline void gf2x_copy(DIGIT dest[], const DIGIT in[]) {
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
dest[i] = in[i];
}
}
/* returns the coefficient of the x^exponent term as the LSB of a digit */
static inline DIGIT gf2x_get_coeff(const DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
return (poly[digitIdx] >> (DIGIT_SIZE_b - 1 - inDigitIdx)) & ((DIGIT) 1) ;
}
/* sets the coefficient of the x^exponent term as the LSB of a digit */
static inline void gf2x_set_coeff(DIGIT poly[], unsigned int exponent, DIGIT value) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ~( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] & mask;
poly[digitIdx] = poly[digitIdx] | (( value & ((DIGIT) 1)) << (DIGIT_SIZE_b - 1 - inDigitIdx));
}
/* toggles (flips) the coefficient of the x^exponent term as the LSB of a digit */
static inline void gf2x_toggle_coeff(DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] ^ mask;
}
/* population count for an unsigned 64-bit integer
Source: Hacker's delight, p.66 */
static int popcount_uint64t(uint64_t x) {
x -= (x >> 1) & 0x5555555555555555;
x = (x & 0x3333333333333333) + ((x >> 2) & 0x3333333333333333);
x = (x + (x >> 4)) & 0x0f0f0f0f0f0f0f0f;
return (int)((x * 0x0101010101010101) >> 56);
}
/* population count for a single polynomial */
static inline int population_count(DIGIT *poly) {
int ret = 0;
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
ret += popcount_uint64t(poly[i]);
}
return ret;
}
static inline void gf2x_mod_add(DIGIT Res[], const DIGIT A[], const DIGIT B[]) {
gf2x_add(Res, A, B, NUM_DIGITS_GF2X_ELEMENT);
}
static inline int partition(POSITION_T arr[], int lo, int hi) {
POSITION_T x = arr[hi];
POSITION_T tmp;
int i = (lo - 1);
for (int j = lo; j <= hi - 1; j++) {
if (arr[j] <= x) {
i++;
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
}
tmp = arr[i + 1];
arr[i + 1] = arr[hi];
arr[hi] = tmp;
return i + 1;
}
static inline void quicksort_sparse(POSITION_T Res[]) {
int stack[DV * M];
int hi, lo, pivot, tos = -1;
stack[++tos] = 0;
stack[++tos] = (DV * M) - 1;
while (tos >= 0 ) {
hi = stack[tos--];
lo = stack[tos--];
pivot = partition(Res, lo, hi);
if ( (pivot - 1) > lo) {
stack[++tos] = lo;
stack[++tos] = pivot - 1;
}
if ( (pivot + 1) < hi) {
stack[++tos] = pivot + 1;
stack[++tos] = hi;
}
}
}
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_copy(DIGIT dest[], const DIGIT in[]);
DIGIT PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_get_coeff(const DIGIT poly[], unsigned int exponent);
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_set_coeff(DIGIT poly[], unsigned int exponent, DIGIT value);
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_toggle_coeff(DIGIT poly[], unsigned int exponent);
int PQCLEAN_LEDAKEMLT32_CLEAN_population_count(DIGIT *poly);
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_add(DIGIT Res[], const DIGIT A[], const DIGIT B[]);
void PQCLEAN_LEDAKEMLT32_CLEAN_quicksort_sparse(POSITION_T Res[]);
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_mul(DIGIT Res[], const DIGIT A[], const DIGIT B[]);
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_transpose_in_place(DIGIT A[]);
void PQCLEAN_LEDAKEMLT32_CLEAN_rand_circulant_sparse_block(POSITION_T *pos_ones, int countOnes, AES_XOF_struct *seed_expander_ctx);
@ -123,7 +31,6 @@ void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_transpose_in_place_sparse(int sizeA, POSITIO
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_mul_sparse(size_t sizeR, POSITION_T Res[], size_t sizeA, const POSITION_T A[], size_t sizeB, const POSITION_T B[]);
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_mul_dense_to_sparse(DIGIT Res[], const DIGIT dense[], POSITION_T sparse[], unsigned int nPos);
void PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_tobytes(uint8_t *bytes, const DIGIT *poly);
int PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_inverse(DIGIT out[], const DIGIT in[]);
#endif

8
crypto_kem/ledakemlt32/clean/niederreiter.c
Ver ficheiro

@ -58,7 +58,7 @@ void PQCLEAN_LEDAKEMLT32_CLEAN_niederreiter_keygen(publicKeyNiederreiter_t *pk,
memset(Ln0dense, 0x00, sizeof(Ln0dense));
for (int j = 0; j < DV * M; j++) {
if (LPosOnes[N0 - 1][j] != INVALID_POS_VALUE) {
gf2x_set_coeff(Ln0dense, LPosOnes[N0 - 1][j], 1);
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_set_coeff(Ln0dense, LPosOnes[N0 - 1][j], 1);
}
}
@ -86,9 +86,9 @@ void PQCLEAN_LEDAKEMLT32_CLEAN_niederreiter_encrypt(DIGIT *syndrome, const publi
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_mul(saux,
pk->Mtr + i * NUM_DIGITS_GF2X_ELEMENT,
err + i * NUM_DIGITS_GF2X_ELEMENT);
gf2x_mod_add(syndrome, syndrome, saux);
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_add(syndrome, syndrome, saux);
}
gf2x_mod_add(syndrome, syndrome, err + (N0 - 1)*NUM_DIGITS_GF2X_ELEMENT);
PQCLEAN_LEDAKEMLT32_CLEAN_gf2x_mod_add(syndrome, syndrome, err + (N0 - 1)*NUM_DIGITS_GF2X_ELEMENT);
}
@ -180,7 +180,7 @@ int PQCLEAN_LEDAKEMLT32_CLEAN_niederreiter_decrypt(DIGIT *err, const privateKeyN
err_weight = 0;
for (int i = 0 ; i < N0; i++) {
err_weight += population_count(err + (NUM_DIGITS_GF2X_ELEMENT * i));
err_weight += PQCLEAN_LEDAKEMLT32_CLEAN_population_count(err + (NUM_DIGITS_GF2X_ELEMENT * i));
}
decryptOk = decryptOk && (err_weight == NUM_ERRORS_T);

8
crypto_kem/ledakemlt52/clean/bf_decoding.c
Ver ficheiro

@ -18,13 +18,13 @@ int PQCLEAN_LEDAKEMLT52_CLEAN_bf_decoding(DIGIT err[],
int iteration = 0;
do {
gf2x_copy(currSyndrome, privateSyndrome);
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_copy(currSyndrome, privateSyndrome);
memset(unsatParityChecks, 0x00, N0 * P * sizeof(uint8_t));
for (int i = 0; i < N0; i++) {
for (int valueIdx = 0; valueIdx < P; valueIdx++) {
for (int HtrOneIdx = 0; HtrOneIdx < DV; HtrOneIdx++) {
POSITION_T tmp = (HtrPosOnes[i][HtrOneIdx] + valueIdx) >= P ? (HtrPosOnes[i][HtrOneIdx] + valueIdx) - P : (HtrPosOnes[i][HtrOneIdx] + valueIdx);
if (gf2x_get_coeff(currSyndrome, tmp)) {
if (PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_get_coeff(currSyndrome, tmp)) {
unsatParityChecks[i * P + valueIdx]++;
}
}
@ -54,13 +54,13 @@ int PQCLEAN_LEDAKEMLT52_CLEAN_bf_decoding(DIGIT err[],
}
/* Correlation based flipping */
if (correlation >= corrt_syndrome_based) {
gf2x_toggle_coeff(err + NUM_DIGITS_GF2X_ELEMENT * i, j);
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_toggle_coeff(err + NUM_DIGITS_GF2X_ELEMENT * i, j);
for (int v = 0; v < M; v++) {
unsigned syndromePosToFlip;
for (int HtrOneIdx = 0; HtrOneIdx < DV; HtrOneIdx++) {
syndromePosToFlip = (HtrPosOnes[currQBlkPos[v]][HtrOneIdx] + currQBitPos[v] );
syndromePosToFlip = syndromePosToFlip >= P ? syndromePosToFlip - P : syndromePosToFlip;
gf2x_toggle_coeff(privateSyndrome, syndromePosToFlip);
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_toggle_coeff(privateSyndrome, syndromePosToFlip);
}
} // end for v
} // end if

4
crypto_kem/ledakemlt52/clean/dfr_test.c
Ver ficheiro

@ -38,7 +38,7 @@ int PQCLEAN_LEDAKEMLT52_CLEAN_DFR_test(POSITION_T LSparse[N0][DV * M]) {
LSparse_loc[i][j] = (P - LSparse[i][j]);
}
}
quicksort_sparse(LSparse_loc[i]);
PQCLEAN_LEDAKEMLT52_CLEAN_quicksort_sparse(LSparse_loc[i]);
}
for (int i = 0; i < N0; i++ ) {
@ -48,7 +48,7 @@ int PQCLEAN_LEDAKEMLT52_CLEAN_DFR_test(POSITION_T LSparse[N0][DV * M]) {
for (int idxToRotate = 0; idxToRotate < (DV * M); idxToRotate++) {
rotated_column[idxToRotate] = (LSparse_loc[j][idxToRotate] + k) % P;
}
quicksort_sparse(rotated_column);
PQCLEAN_LEDAKEMLT52_CLEAN_quicksort_sparse(rotated_column);
/* compute the intersection amount */
firstidx = 0, secondidx = 0;
intersectionval = 0;

6
crypto_kem/ledakemlt52/clean/gf2x_arith.c
Ver ficheiro

@ -3,6 +3,12 @@
#include <assert.h>
#include <string.h> // memset(...)
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_add(DIGIT Res[], const DIGIT A[], const DIGIT B[], int nr) {
for (int i = 0; i < nr; i++) {
Res[i] = A[i] ^ B[i];
}
}
/* PRE: MAX ALLOWED ROTATION AMOUNT : DIGIT_SIZE_b */
void PQCLEAN_LEDAKEMLT52_CLEAN_right_bit_shift_n(int length, DIGIT in[], unsigned int amount) {
assert(amount < DIGIT_SIZE_b);

7
crypto_kem/ledakemlt52/clean/gf2x_arith.h
Ver ficheiro

@ -50,12 +50,7 @@ typedef uint64_t DIGIT;
#define GF2X_MUL PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mul_comb
static inline void gf2x_add(DIGIT Res[], const DIGIT A[], const DIGIT B[], int nr) {
for (int i = 0; i < nr; i++) {
Res[i] = A[i] ^ B[i];
}
}
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_add(DIGIT Res[], const DIGIT A[], const DIGIT B[], int nr);
void PQCLEAN_LEDAKEMLT52_CLEAN_right_bit_shift_n(int length, DIGIT in[], unsigned int amount);
void PQCLEAN_LEDAKEMLT52_CLEAN_left_bit_shift_n(int length, DIGIT in[], unsigned int amount);
void GF2X_MUL(int nr, DIGIT Res[], int na, const DIGIT A[], int nb, const DIGIT B[]);

119
crypto_kem/ledakemlt52/clean/gf2x_arith_mod_xPplusOne.c
Ver ficheiro

@ -5,6 +5,104 @@
#include <string.h> // memcpy(...), memset(...)
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_copy(DIGIT dest[], const DIGIT in[]) {
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
dest[i] = in[i];
}
}
/* returns the coefficient of the x^exponent term as the LSB of a digit */
DIGIT PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_get_coeff(const DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
return (poly[digitIdx] >> (DIGIT_SIZE_b - 1 - inDigitIdx)) & ((DIGIT) 1) ;
}
/* sets the coefficient of the x^exponent term as the LSB of a digit */
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_set_coeff(DIGIT poly[], unsigned int exponent, DIGIT value) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ~( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] & mask;
poly[digitIdx] = poly[digitIdx] | (( value & ((DIGIT) 1)) << (DIGIT_SIZE_b - 1 - inDigitIdx));
}
/* toggles (flips) the coefficient of the x^exponent term as the LSB of a digit */
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_toggle_coeff(DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] ^ mask;
}
/* population count for an unsigned 64-bit integer
Source: Hacker's delight, p.66 */
static int popcount_uint64t(uint64_t x) {
x -= (x >> 1) & 0x5555555555555555;
x = (x & 0x3333333333333333) + ((x >> 2) & 0x3333333333333333);
x = (x + (x >> 4)) & 0x0f0f0f0f0f0f0f0f;
return (int)((x * 0x0101010101010101) >> 56);
}
/* population count for a single polynomial */
int PQCLEAN_LEDAKEMLT52_CLEAN_population_count(DIGIT *poly) {
int ret = 0;
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
ret += popcount_uint64t(poly[i]);
}
return ret;
}
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_add(DIGIT Res[], const DIGIT A[], const DIGIT B[]) {
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_add(Res, A, B, NUM_DIGITS_GF2X_ELEMENT);
}
static int partition(POSITION_T arr[], int lo, int hi) {
POSITION_T x = arr[hi];
POSITION_T tmp;
int i = (lo - 1);
for (int j = lo; j <= hi - 1; j++) {
if (arr[j] <= x) {
i++;
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
}
tmp = arr[i + 1];
arr[i + 1] = arr[hi];
arr[hi] = tmp;
return i + 1;
}
void PQCLEAN_LEDAKEMLT52_CLEAN_quicksort_sparse(POSITION_T Res[]) {
int stack[DV * M];
int hi, lo, pivot, tos = -1;
stack[++tos] = 0;
stack[++tos] = (DV * M) - 1;
while (tos >= 0 ) {
hi = stack[tos--];
lo = stack[tos--];
pivot = partition(Res, lo, hi);
if ( (pivot - 1) > lo) {
stack[++tos] = lo;
stack[++tos] = pivot - 1;
}
if ( (pivot + 1) < hi) {
stack[++tos] = pivot + 1;
stack[++tos] = hi;
}
}
}
static void gf2x_mod(DIGIT out[], const DIGIT in[]) {
int i, j, posTrailingBit, maskOffset;
@ -65,7 +163,7 @@ static void right_bit_shift(unsigned int length, DIGIT in[]) {
/* shifts by whole digits */
static inline void left_DIGIT_shift_n(unsigned int length, DIGIT in[], unsigned int amount) {
static void left_DIGIT_shift_n(unsigned int length, DIGIT in[], unsigned int amount) {
unsigned int j;
for (j = 0; (j + amount) < length; j++) {
in[j] = in[j + amount];
@ -75,7 +173,6 @@ static inline void left_DIGIT_shift_n(unsigned int length, DIGIT in[], unsigned
}
}
/* may shift by an arbitrary amount*/
static void left_bit_shift_wide_n(const int length, DIGIT in[], unsigned int amount) {
left_DIGIT_shift_n(length, in, amount / DIGIT_SIZE_b);
@ -143,9 +240,7 @@ static void rotate_bit_right(DIGIT in[]) { /* x^{-1} * in(x) mod x^P+1 */
in[0] |= rotated_bit;
}
static void gf2x_swap(const int length,
DIGIT f[],
DIGIT s[]) {
static void gf2x_swap(const int length, DIGIT f[], DIGIT s[]) {
DIGIT t;
for (int i = length - 1; i >= 0; i--) {
t = f[i];
@ -174,7 +269,7 @@ static void gf2x_swap(const int length,
int PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_inverse(DIGIT out[], const DIGIT in[]) { /* in^{-1} mod x^P-1 */
int i;
long int delta = 0;
int delta = 0;
DIGIT u[NUM_DIGITS_GF2X_ELEMENT] = {0};
DIGIT v[NUM_DIGITS_GF2X_ELEMENT] = {0};
DIGIT s[NUM_DIGITS_GF2X_MODULUS] = {0};
@ -205,8 +300,8 @@ int PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_inverse(DIGIT out[], const DIGIT in[]) {
delta += 1;
} else {
if ( (s[0] & mask) != 0) {
gf2x_add(s, s, f, NUM_DIGITS_GF2X_MODULUS);
gf2x_mod_add(v, v, u);
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_add(s, s, f, NUM_DIGITS_GF2X_MODULUS);
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_add(v, v, u);
}
left_bit_shift(NUM_DIGITS_GF2X_MODULUS, s);
if ( delta == 0 ) {
@ -258,7 +353,7 @@ void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_mul_dense_to_sparse(
for (unsigned int i = 1; i < nPos; i++) {
if (sparse[i] != INVALID_POS_VALUE) {
left_bit_shift_wide_n(2 * NUM_DIGITS_GF2X_ELEMENT, aux, (sparse[i] - sparse[i - 1]) );
gf2x_add(resDouble, aux, resDouble, 2 * NUM_DIGITS_GF2X_ELEMENT);
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_add(resDouble, aux, resDouble, 2 * NUM_DIGITS_GF2X_ELEMENT);
}
}
}
@ -312,7 +407,7 @@ void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_mul_sparse(size_t sizeR, POSITION_T Res[
Res[lastFilledPos] = INVALID_POS_VALUE;
lastFilledPos++;
}
quicksort_sparse(Res);
PQCLEAN_LEDAKEMLT52_CLEAN_quicksort_sparse(Res);
/* eliminate duplicates */
POSITION_T lastReadPos = Res[0];
int duplicateCount;
@ -464,8 +559,8 @@ void PQCLEAN_LEDAKEMLT52_CLEAN_rand_circulant_blocks_sequence(
for (int j = 0; j < counter; j++) {
polyIndex = rndPos[j] / P;
exponent = rndPos[j] % P;
gf2x_set_coeff( sequence + NUM_DIGITS_GF2X_ELEMENT * polyIndex, exponent,
( (DIGIT) 1));
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_set_coeff( sequence + NUM_DIGITS_GF2X_ELEMENT * polyIndex, exponent,
( (DIGIT) 1));
}
}

107
crypto_kem/ledakemlt52/clean/gf2x_arith_mod_xPplusOne.h
Ver ficheiro

@ -15,105 +15,13 @@
#define INVALID_POS_VALUE (P)
#define P_BITS (18) // log_2(p) = 17.216243783
static inline void gf2x_copy(DIGIT dest[], const DIGIT in[]) {
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
dest[i] = in[i];
}
}
/* returns the coefficient of the x^exponent term as the LSB of a digit */
static inline DIGIT gf2x_get_coeff(const DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
return (poly[digitIdx] >> (DIGIT_SIZE_b - 1 - inDigitIdx)) & ((DIGIT) 1) ;
}
/* sets the coefficient of the x^exponent term as the LSB of a digit */
static inline void gf2x_set_coeff(DIGIT poly[], unsigned int exponent, DIGIT value) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ~( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] & mask;
poly[digitIdx] = poly[digitIdx] | (( value & ((DIGIT) 1)) << (DIGIT_SIZE_b - 1 - inDigitIdx));
}
/* toggles (flips) the coefficient of the x^exponent term as the LSB of a digit */
static inline void gf2x_toggle_coeff(DIGIT poly[], unsigned int exponent) {
unsigned int straightIdx = (NUM_DIGITS_GF2X_ELEMENT * DIGIT_SIZE_b - 1) - exponent;
unsigned int digitIdx = straightIdx / DIGIT_SIZE_b;
unsigned int inDigitIdx = straightIdx % DIGIT_SIZE_b;
/* clear given coefficient */
DIGIT mask = ( ((DIGIT) 1) << (DIGIT_SIZE_b - 1 - inDigitIdx));
poly[digitIdx] = poly[digitIdx] ^ mask;
}
/* population count for an unsigned 64-bit integer
Source: Hacker's delight, p.66 */
static int popcount_uint64t(uint64_t x) {
x -= (x >> 1) & 0x5555555555555555;
x = (x & 0x3333333333333333) + ((x >> 2) & 0x3333333333333333);
x = (x + (x >> 4)) & 0x0f0f0f0f0f0f0f0f;
return (int)((x * 0x0101010101010101) >> 56);
}
/* population count for a single polynomial */
static inline int population_count(DIGIT *poly) {
int ret = 0;
for (int i = NUM_DIGITS_GF2X_ELEMENT - 1; i >= 0; i--) {
ret += popcount_uint64t(poly[i]);
}
return ret;
}
static inline void gf2x_mod_add(DIGIT Res[], const DIGIT A[], const DIGIT B[]) {
gf2x_add(Res, A, B, NUM_DIGITS_GF2X_ELEMENT);
}
static inline int partition(POSITION_T arr[], int lo, int hi) {
POSITION_T x = arr[hi];
POSITION_T tmp;
int i = (lo - 1);
for (int j = lo; j <= hi - 1; j++) {
if (arr[j] <= x) {
i++;
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
}
tmp = arr[i + 1];
arr[i + 1] = arr[hi];
arr[hi] = tmp;
return i + 1;
}
static inline void quicksort_sparse(POSITION_T Res[]) {
int stack[DV * M];
int hi, lo, pivot, tos = -1;
stack[++tos] = 0;
stack[++tos] = (DV * M) - 1;
while (tos >= 0 ) {
hi = stack[tos--];
lo = stack[tos--];
pivot = partition(Res, lo, hi);
if ( (pivot - 1) > lo) {
stack[++tos] = lo;
stack[++tos] = pivot - 1;
}
if ( (pivot + 1) < hi) {
stack[++tos] = pivot + 1;
stack[++tos] = hi;
}
}
}
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_copy(DIGIT dest[], const DIGIT in[]);
DIGIT PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_get_coeff(const DIGIT poly[], unsigned int exponent);
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_set_coeff(DIGIT poly[], unsigned int exponent, DIGIT value);
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_toggle_coeff(DIGIT poly[], unsigned int exponent);
int PQCLEAN_LEDAKEMLT52_CLEAN_population_count(DIGIT *poly);
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_add(DIGIT Res[], const DIGIT A[], const DIGIT B[]);
void PQCLEAN_LEDAKEMLT52_CLEAN_quicksort_sparse(POSITION_T Res[]);
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_mul(DIGIT Res[], const DIGIT A[], const DIGIT B[]);
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_transpose_in_place(DIGIT A[]);
void PQCLEAN_LEDAKEMLT52_CLEAN_rand_circulant_sparse_block(POSITION_T *pos_ones, int countOnes, AES_XOF_struct *seed_expander_ctx);
@ -123,7 +31,6 @@ void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_transpose_in_place_sparse(int sizeA, POSITIO
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_mul_sparse(size_t sizeR, POSITION_T Res[], size_t sizeA, const POSITION_T A[], size_t sizeB, const POSITION_T B[]);
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_mul_dense_to_sparse(DIGIT Res[], const DIGIT dense[], POSITION_T sparse[], unsigned int nPos);
void PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_tobytes(uint8_t *bytes, const DIGIT *poly);
int PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_inverse(DIGIT out[], const DIGIT in[]);
#endif

8
crypto_kem/ledakemlt52/clean/niederreiter.c
Ver ficheiro

@ -58,7 +58,7 @@ void PQCLEAN_LEDAKEMLT52_CLEAN_niederreiter_keygen(publicKeyNiederreiter_t *pk,
memset(Ln0dense, 0x00, sizeof(Ln0dense));
for (int j = 0; j < DV * M; j++) {
if (LPosOnes[N0 - 1][j] != INVALID_POS_VALUE) {
gf2x_set_coeff(Ln0dense, LPosOnes[N0 - 1][j], 1);
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_set_coeff(Ln0dense, LPosOnes[N0 - 1][j], 1);
}
}
@ -86,9 +86,9 @@ void PQCLEAN_LEDAKEMLT52_CLEAN_niederreiter_encrypt(DIGIT *syndrome, const publi
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_mul(saux,
pk->Mtr + i * NUM_DIGITS_GF2X_ELEMENT,
err + i * NUM_DIGITS_GF2X_ELEMENT);
gf2x_mod_add(syndrome, syndrome, saux);
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_add(syndrome, syndrome, saux);
}
gf2x_mod_add(syndrome, syndrome, err + (N0 - 1)*NUM_DIGITS_GF2X_ELEMENT);
PQCLEAN_LEDAKEMLT52_CLEAN_gf2x_mod_add(syndrome, syndrome, err + (N0 - 1)*NUM_DIGITS_GF2X_ELEMENT);
}
@ -180,7 +180,7 @@ int PQCLEAN_LEDAKEMLT52_CLEAN_niederreiter_decrypt(DIGIT *err, const privateKeyN
err_weight = 0;
for (int i = 0 ; i < N0; i++) {
err_weight += population_count(err + (NUM_DIGITS_GF2X_ELEMENT * i));
err_weight += PQCLEAN_LEDAKEMLT52_CLEAN_population_count(err + (NUM_DIGITS_GF2X_ELEMENT * i));
}
decryptOk = decryptOk && (err_weight == NUM_ERRORS_T);