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Add _legacy suffix to functions accessing points in compressed/coordinate representation

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This commit is contained in:
Matthias Schiffer 2015-10-17 04:31:01 +02:00
parent 256e972b36
commit 5f143b1c29
2 changed files with 63 additions and 9 deletions
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42
include/libuecc/ecc.h
View file

@ -99,7 +99,15 @@ DEPRECATED extern const ecc_25519_work_t ecc_25519_work_default_base;
/** Loads a point with given coordinates into its unpacked representation */ /** Loads a point with given coordinates into its unpacked representation */
int ecc_25519_load_xy(ecc_25519_work_t *out, const ecc_int256_t *x, const ecc_int256_t *y); int ecc_25519_load_xy_legacy(ecc_25519_work_t *out, const ecc_int256_t *x, const ecc_int256_t *y);
/**
* Loads a point with given coordinates into its unpacked representation
*
* \deprecated Use \ref ecc_25519_load_xy_legacy
*/
DEPRECATED int ecc_25519_load_xy(ecc_25519_work_t *out, const ecc_int256_t *x, const ecc_int256_t *y);
/** /**
* Stores a point's x and y coordinates * Stores a point's x and y coordinates
@ -108,14 +116,40 @@ int ecc_25519_load_xy(ecc_25519_work_t *out, const ecc_int256_t *x, const ecc_in
* \param y Returns the y coordinate of the point. May be NULL. * \param y Returns the y coordinate of the point. May be NULL.
* \param in The unpacked point to store. * \param in The unpacked point to store.
*/ */
void ecc_25519_store_xy(ecc_int256_t *x, ecc_int256_t *y, const ecc_25519_work_t *in); void ecc_25519_store_xy_legacy(ecc_int256_t *x, ecc_int256_t *y, const ecc_25519_work_t *in);
/**
* Stores a point's x and y coordinates
*
* \param x Returns the x coordinate of the point. May be NULL.
* \param y Returns the y coordinate of the point. May be NULL.
* \param in The unpacked point to store.
*
* \deprecated Use \ref ecc_25519_store_xy_legacy
*/
DEPRECATED void ecc_25519_store_xy(ecc_int256_t *x, ecc_int256_t *y, const ecc_25519_work_t *in);
/** Loads a packed point into its unpacked representation */ /** Loads a packed point into its unpacked representation */
int ecc_25519_load_packed(ecc_25519_work_t *out, const ecc_int256_t *in); int ecc_25519_load_packed_legacy(ecc_25519_work_t *out, const ecc_int256_t *in);
/**
* Loads a packed point into its unpacked representation
*
* \deprecated Use \ref ecc_25519_load_packed_legacy
*/
DEPRECATED int ecc_25519_load_packed(ecc_25519_work_t *out, const ecc_int256_t *in);
/** Stores a point into its packed representation */ /** Stores a point into its packed representation */
void ecc_25519_store_packed(ecc_int256_t *out, const ecc_25519_work_t *in); void ecc_25519_store_packed_legacy(ecc_int256_t *out, const ecc_25519_work_t *in);
/**
* Stores a point into its packed representation
*
* \deprecated Use \ref ecc_25519_store_packed_legacy
*/
DEPRECATED void ecc_25519_store_packed(ecc_int256_t *out, const ecc_25519_work_t *in);
/** Checks if a point is the identity element of the Elliptic Curve group */ /** Checks if a point is the identity element of the Elliptic Curve group */

30
src/ec25519.c
View file

@ -524,7 +524,7 @@ static void recip(uint32_t out[32], const uint32_t z[32]) {
/* 2^255 - 21 */ mult(out, t1, z11); /* 2^255 - 21 */ mult(out, t1, z11);
} }
int ecc_25519_load_xy(ecc_25519_work_t *out, const ecc_int256_t *x, const ecc_int256_t *y) { int ecc_25519_load_xy_legacy(ecc_25519_work_t *out, const ecc_int256_t *x, const ecc_int256_t *y) {
int i; int i;
uint32_t X2[32], Y2[32], aX2[32], dX2[32], dX2Y2[32], aX2_Y2[32], _1_dX2Y2[32], r[32]; uint32_t X2[32], Y2[32], aX2[32], dX2[32], dX2Y2[32], aX2_Y2[32], _1_dX2Y2[32], r[32];
@ -553,7 +553,12 @@ int ecc_25519_load_xy(ecc_25519_work_t *out, const ecc_int256_t *x, const ecc_in
return 1; return 1;
} }
void ecc_25519_store_xy(ecc_int256_t *x, ecc_int256_t *y, const ecc_25519_work_t *in) { int ecc_25519_load_xy(ecc_25519_work_t *out, const ecc_int256_t *x, const ecc_int256_t *y) {
return ecc_25519_load_xy_legacy(out, x, y);
}
void ecc_25519_store_xy_legacy(ecc_int256_t *x, ecc_int256_t *y, const ecc_25519_work_t *in) {
uint32_t X[32], Y[32], Z[32]; uint32_t X[32], Y[32], Z[32];
int i; int i;
@ -574,7 +579,12 @@ void ecc_25519_store_xy(ecc_int256_t *x, ecc_int256_t *y, const ecc_25519_work_t
} }
} }
int ecc_25519_load_packed(ecc_25519_work_t *out, const ecc_int256_t *in) { void ecc_25519_store_xy(ecc_int256_t *x, ecc_int256_t *y, const ecc_25519_work_t *in) {
ecc_25519_store_xy_legacy(x, y, in);
}
int ecc_25519_load_packed_legacy(ecc_25519_work_t *out, const ecc_int256_t *in) {
int i; int i;
uint32_t X2[32] /* X^2 */, aX2[32] /* aX^2 */, dX2[32] /* dX^2 */, _1_aX2[32] /* 1-aX^2 */, _1_dX2[32] /* 1-aX^2 */; uint32_t X2[32] /* X^2 */, aX2[32] /* aX^2 */, dX2[32] /* dX^2 */, _1_aX2[32] /* 1-aX^2 */, _1_dX2[32] /* 1-aX^2 */;
uint32_t _1_1_dX2[32] /* 1/(1-aX^2) */, Y2[32] /* Y^2 */, Y[32], Yt[32]; uint32_t _1_1_dX2[32] /* 1/(1-aX^2) */, Y2[32] /* Y^2 */, Y[32], Yt[32];
@ -607,13 +617,23 @@ int ecc_25519_load_packed(ecc_25519_work_t *out, const ecc_int256_t *in) {
return 1; return 1;
} }
void ecc_25519_store_packed(ecc_int256_t *out, const ecc_25519_work_t *in) { int ecc_25519_load_packed(ecc_25519_work_t *out, const ecc_int256_t *in) {
return ecc_25519_load_packed_legacy(out, in);
}
void ecc_25519_store_packed_legacy(ecc_int256_t *out, const ecc_25519_work_t *in) {
ecc_int256_t y; ecc_int256_t y;
ecc_25519_store_xy(out, &y, in); ecc_25519_store_xy_legacy(out, &y, in);
out->p[31] |= (y.p[0] << 7); out->p[31] |= (y.p[0] << 7);
} }
void ecc_25519_store_packed(ecc_int256_t *out, const ecc_25519_work_t *in) {
ecc_25519_store_packed_legacy(out, in);
}
int ecc_25519_is_identity(const ecc_25519_work_t *in) { int ecc_25519_is_identity(const ecc_25519_work_t *in) {
uint32_t Y_Z[32]; uint32_t Y_Z[32];