mirror of
https://github.com/jedisct1/libsodium.git
synced 2026-08-25 08:37:13 +09:00
Move the legacy edwards25519sha512batch code to the attic
This commit is contained in:
Frank Denis
@@ -240,15 +240,6 @@ libsodium_la_SOURCES += \
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crypto_core/salsa208/ref/core_salsa208.c \
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crypto_core/salsa208/core_salsa208_api.c \
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crypto_core/salsa208/ref/api.h \
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crypto_sign/edwards25519sha512batch/sign_edwards25519sha512batch_api.c \
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crypto_sign/edwards25519sha512batch/ref/api.h \
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crypto_sign/edwards25519sha512batch/ref/fe25519.h \
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crypto_sign/edwards25519sha512batch/ref/fe25519_edwards25519sha512batch.c \
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crypto_sign/edwards25519sha512batch/ref/ge25519.h \
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crypto_sign/edwards25519sha512batch/ref/ge25519_edwards25519sha512batch.c \
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crypto_sign/edwards25519sha512batch/ref/sc25519.h \
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crypto_sign/edwards25519sha512batch/ref/sc25519_edwards25519sha512batch.c \
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crypto_sign/edwards25519sha512batch/ref/sign_edwards25519sha512batch.c \
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crypto_stream/aes128ctr/portable/afternm_aes128ctr.c \
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crypto_stream/aes128ctr/stream_aes128ctr_api.c \
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crypto_stream/aes128ctr/portable/api.h \
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@@ -1,12 +0,0 @@
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#include "crypto_sign_edwards25519sha512batch.h"
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#define crypto_sign crypto_sign_edwards25519sha512batch
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#define crypto_sign_open crypto_sign_edwards25519sha512batch_open
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#define crypto_sign_keypair crypto_sign_edwards25519sha512batch_keypair
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#define crypto_sign_BYTES crypto_sign_edwards25519sha512batch_BYTES
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#define crypto_sign_PUBLICKEYBYTES crypto_sign_edwards25519sha512batch_PUBLICKEYBYTES
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#define crypto_sign_SECRETKEYBYTES crypto_sign_edwards25519sha512batch_SECRETKEYBYTES
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#define crypto_sign_IMPLEMENTATION crypto_sign_edwards25519sha512batch_IMPLEMENTATION
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#define crypto_sign_VERSION crypto_sign_edwards25519sha512batch_VERSION
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@@ -1,54 +0,0 @@
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#ifndef FE25519_H
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#define FE25519_H
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#define fe25519 crypto_sign_edwards25519sha512batch_fe25519
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#define fe25519_unpack crypto_sign_edwards25519sha512batch_fe25519_unpack
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#define fe25519_pack crypto_sign_edwards25519sha512batch_fe25519_pack
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#define fe25519_cmov crypto_sign_edwards25519sha512batch_fe25519_cmov
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#define fe25519_setone crypto_sign_edwards25519sha512batch_fe25519_setone
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#define fe25519_setzero crypto_sign_edwards25519sha512batch_fe25519_setzero
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#define fe25519_neg crypto_sign_edwards25519sha512batch_fe25519_neg
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#define fe25519_getparity crypto_sign_edwards25519sha512batch_fe25519_getparity
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#define fe25519_add crypto_sign_edwards25519sha512batch_fe25519_add
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#define fe25519_sub crypto_sign_edwards25519sha512batch_fe25519_sub
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#define fe25519_mul crypto_sign_edwards25519sha512batch_fe25519_mul
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#define fe25519_square crypto_sign_edwards25519sha512batch_fe25519_square
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#define fe25519_pow crypto_sign_edwards25519sha512batch_fe25519_pow
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#define fe25519_sqrt_vartime crypto_sign_edwards25519sha512batch_fe25519_sqrt_vartime
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#define fe25519_invert crypto_sign_edwards25519sha512batch_fe25519_invert
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#include "crypto_uint32.h"
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typedef struct {
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crypto_uint32 v[32];
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} fe25519;
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void fe25519_unpack(fe25519 *r, const unsigned char x[32]);
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void fe25519_pack(unsigned char r[32], const fe25519 *x);
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void fe25519_cmov(fe25519 *r, const fe25519 *x, unsigned char b);
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void fe25519_setone(fe25519 *r);
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void fe25519_setzero(fe25519 *r);
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void fe25519_neg(fe25519 *r, const fe25519 *x);
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unsigned char fe25519_getparity(const fe25519 *x);
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void fe25519_add(fe25519 *r, const fe25519 *x, const fe25519 *y);
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void fe25519_sub(fe25519 *r, const fe25519 *x, const fe25519 *y);
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void fe25519_mul(fe25519 *r, const fe25519 *x, const fe25519 *y);
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void fe25519_square(fe25519 *r, const fe25519 *x);
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void fe25519_pow(fe25519 *r, const fe25519 *x, const unsigned char *e);
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int fe25519_sqrt_vartime(fe25519 *r, const fe25519 *x, unsigned char parity);
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void fe25519_invert(fe25519 *r, const fe25519 *x);
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#endif
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-348
@@ -1,348 +0,0 @@
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#include "fe25519.h"
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#define WINDOWSIZE 4 /* Should be 1,2, or 4 */
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#define WINDOWMASK ((1<<WINDOWSIZE)-1)
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static void reduce_add_sub(fe25519 *r)
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{
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crypto_uint32 t;
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int i,rep;
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for(rep=0;rep<4;rep++)
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{
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t = r->v[31] >> 7;
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r->v[31] &= 127;
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t *= 19;
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r->v[0] += t;
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for(i=0;i<31;i++)
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{
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t = r->v[i] >> 8;
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r->v[i+1] += t;
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r->v[i] &= 255;
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}
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}
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}
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static void reduce_mul(fe25519 *r)
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{
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crypto_uint32 t;
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int i,rep;
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for(rep=0;rep<2;rep++)
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{
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t = r->v[31] >> 7;
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r->v[31] &= 127;
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t *= 19;
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r->v[0] += t;
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for(i=0;i<31;i++)
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{
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t = r->v[i] >> 8;
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r->v[i+1] += t;
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r->v[i] &= 255;
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}
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}
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}
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/* reduction modulo 2^255-19 */
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static void freeze(fe25519 *r)
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{
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int i;
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unsigned int m = (r->v[31] == 127);
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for(i=30;i>1;i--)
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m *= (r->v[i] == 255);
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m *= (r->v[0] >= 237);
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r->v[31] -= m*127;
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for(i=30;i>0;i--)
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r->v[i] -= m*255;
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r->v[0] -= m*237;
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}
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/*freeze input before calling isone*/
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static int isone(const fe25519 *x)
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{
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int i;
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int r = (x->v[0] == 1);
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for(i=1;i<32;i++)
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r *= (x->v[i] == 0);
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return r;
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}
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/*freeze input before calling iszero*/
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static int iszero(const fe25519 *x)
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{
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int i;
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int r = (x->v[0] == 0);
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for(i=1;i<32;i++)
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r *= (x->v[i] == 0);
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return r;
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}
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static int issquare(const fe25519 *x)
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{
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unsigned char e[32] = {0xf6,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x3f}; /* (p-1)/2 */
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fe25519 t;
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fe25519_pow(&t,x,e);
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freeze(&t);
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return isone(&t) || iszero(&t);
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}
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void fe25519_unpack(fe25519 *r, const unsigned char x[32])
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{
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int i;
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for(i=0;i<32;i++) r->v[i] = x[i];
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r->v[31] &= 127;
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}
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/* Assumes input x being reduced mod 2^255 */
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void fe25519_pack(unsigned char r[32], const fe25519 *x)
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{
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int i;
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unsigned int m;
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for(i=0;i<32;i++)
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r[i] = x->v[i];
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/* freeze byte array */
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m = (r[31] == 127); /* XXX: some compilers might use branches; fix */
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for(i=30;i>1;i--)
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m *= (r[i] == 255);
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m *= (r[0] >= 237);
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r[31] -= m*127;
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for(i=30;i>0;i--)
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r[i] -= m*255;
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r[0] -= m*237;
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}
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void fe25519_cmov(fe25519 *r, const fe25519 *x, unsigned char b)
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{
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unsigned char nb = 1-b;
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int i;
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for(i=0;i<32;i++) r->v[i] = nb * r->v[i] + b * x->v[i];
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}
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unsigned char fe25519_getparity(const fe25519 *x)
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{
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fe25519 t;
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int i;
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for(i=0;i<32;i++) t.v[i] = x->v[i];
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freeze(&t);
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return t.v[0] & 1;
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}
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void fe25519_setone(fe25519 *r)
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{
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int i;
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r->v[0] = 1;
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for(i=1;i<32;i++) r->v[i]=0;
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}
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void fe25519_setzero(fe25519 *r)
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{
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int i;
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for(i=0;i<32;i++) r->v[i]=0;
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}
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void fe25519_neg(fe25519 *r, const fe25519 *x)
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{
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fe25519 t;
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int i;
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for(i=0;i<32;i++) t.v[i]=x->v[i];
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fe25519_setzero(r);
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fe25519_sub(r, r, &t);
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}
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void fe25519_add(fe25519 *r, const fe25519 *x, const fe25519 *y)
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{
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int i;
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for(i=0;i<32;i++) r->v[i] = x->v[i] + y->v[i];
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reduce_add_sub(r);
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}
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void fe25519_sub(fe25519 *r, const fe25519 *x, const fe25519 *y)
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{
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int i;
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crypto_uint32 t[32];
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t[0] = x->v[0] + 0x1da;
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t[31] = x->v[31] + 0xfe;
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for(i=1;i<31;i++) t[i] = x->v[i] + 0x1fe;
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for(i=0;i<32;i++) r->v[i] = t[i] - y->v[i];
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reduce_add_sub(r);
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}
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void fe25519_mul(fe25519 *r, const fe25519 *x, const fe25519 *y)
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{
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int i,j;
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crypto_uint32 t[63];
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for(i=0;i<63;i++)t[i] = 0;
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for(i=0;i<32;i++)
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for(j=0;j<32;j++)
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t[i+j] += x->v[i] * y->v[j];
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for(i=32;i<63;i++)
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r->v[i-32] = t[i-32] + 38*t[i];
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r->v[31] = t[31]; /* result now in r[0]...r[31] */
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reduce_mul(r);
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}
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void fe25519_square(fe25519 *r, const fe25519 *x)
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{
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fe25519_mul(r, x, x);
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}
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/*XXX: Make constant time! */
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void fe25519_pow(fe25519 *r, const fe25519 *x, const unsigned char *e)
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{
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/*
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fe25519 g;
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fe25519_setone(&g);
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int i;
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unsigned char j;
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for(i=32;i>0;i--)
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{
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for(j=128;j>0;j>>=1)
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{
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fe25519_square(&g,&g);
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if(e[i-1] & j)
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fe25519_mul(&g,&g,x);
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}
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}
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for(i=0;i<32;i++) r->v[i] = g.v[i];
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*/
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fe25519 g;
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int i,j,k;
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fe25519 t;
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unsigned char w;
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fe25519 pre[(1 << WINDOWSIZE)];
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fe25519_setone(&g);
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// Precomputation
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fe25519_setone(pre);
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pre[1] = *x;
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for(i=2;i<(1<<WINDOWSIZE);i+=2)
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{
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fe25519_square(pre+i, pre+i/2);
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fe25519_mul(pre+i+1, pre+i, pre+1);
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}
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// Fixed-window scalar multiplication
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for(i=32;i>0;i--)
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{
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for(j=8-WINDOWSIZE;j>=0;j-=WINDOWSIZE)
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{
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for(k=0;k<WINDOWSIZE;k++)
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fe25519_square(&g, &g);
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// Cache-timing resistant loading of precomputed value:
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w = (e[i-1]>>j) & WINDOWMASK;
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t = pre[0];
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for(k=1;k<(1<<WINDOWSIZE);k++)
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fe25519_cmov(&t, &pre[k], k==w);
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fe25519_mul(&g, &g, &t);
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}
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}
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*r = g;
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}
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/* Return 0 on success, 1 otherwise */
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int fe25519_sqrt_vartime(fe25519 *r, const fe25519 *x, unsigned char parity)
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{
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unsigned char e[32] = {0xfb,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x1f}; /* (p-1)/4 */
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unsigned char e2[32] = {0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x0f}; /* (p+3)/8 */
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unsigned char e3[32] = {0xfd,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x0f}; /* (p-5)/8 */
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fe25519 p = {{0}};
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fe25519 d;
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int i;
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/* See HAC, Alg. 3.37 */
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if (!issquare(x)) return -1;
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fe25519_pow(&d,x,e);
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freeze(&d);
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if(isone(&d))
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fe25519_pow(r,x,e2);
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else
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{
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for(i=0;i<32;i++)
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d.v[i] = 4*x->v[i];
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fe25519_pow(&d,&d,e3);
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for(i=0;i<32;i++)
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r->v[i] = 2*x->v[i];
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fe25519_mul(r,r,&d);
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}
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freeze(r);
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if((r->v[0] & 1) != (parity & 1))
|
||||
{
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fe25519_sub(r,&p,r);
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}
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return 0;
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}
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void fe25519_invert(fe25519 *r, const fe25519 *x)
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{
|
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fe25519 z2;
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fe25519 z9;
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fe25519 z11;
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fe25519 z2_5_0;
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fe25519 z2_10_0;
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fe25519 z2_20_0;
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fe25519 z2_50_0;
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fe25519 z2_100_0;
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fe25519 t0;
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fe25519 t1;
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int i;
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/* 2 */ fe25519_square(&z2,x);
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/* 4 */ fe25519_square(&t1,&z2);
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/* 8 */ fe25519_square(&t0,&t1);
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/* 9 */ fe25519_mul(&z9,&t0,x);
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/* 11 */ fe25519_mul(&z11,&z9,&z2);
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/* 22 */ fe25519_square(&t0,&z11);
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/* 2^5 - 2^0 = 31 */ fe25519_mul(&z2_5_0,&t0,&z9);
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||||
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/* 2^6 - 2^1 */ fe25519_square(&t0,&z2_5_0);
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/* 2^7 - 2^2 */ fe25519_square(&t1,&t0);
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/* 2^8 - 2^3 */ fe25519_square(&t0,&t1);
|
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/* 2^9 - 2^4 */ fe25519_square(&t1,&t0);
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/* 2^10 - 2^5 */ fe25519_square(&t0,&t1);
|
||||
/* 2^10 - 2^0 */ fe25519_mul(&z2_10_0,&t0,&z2_5_0);
|
||||
|
||||
/* 2^11 - 2^1 */ fe25519_square(&t0,&z2_10_0);
|
||||
/* 2^12 - 2^2 */ fe25519_square(&t1,&t0);
|
||||
/* 2^20 - 2^10 */ for (i = 2;i < 10;i += 2) { fe25519_square(&t0,&t1); fe25519_square(&t1,&t0); }
|
||||
/* 2^20 - 2^0 */ fe25519_mul(&z2_20_0,&t1,&z2_10_0);
|
||||
|
||||
/* 2^21 - 2^1 */ fe25519_square(&t0,&z2_20_0);
|
||||
/* 2^22 - 2^2 */ fe25519_square(&t1,&t0);
|
||||
/* 2^40 - 2^20 */ for (i = 2;i < 20;i += 2) { fe25519_square(&t0,&t1); fe25519_square(&t1,&t0); }
|
||||
/* 2^40 - 2^0 */ fe25519_mul(&t0,&t1,&z2_20_0);
|
||||
|
||||
/* 2^41 - 2^1 */ fe25519_square(&t1,&t0);
|
||||
/* 2^42 - 2^2 */ fe25519_square(&t0,&t1);
|
||||
/* 2^50 - 2^10 */ for (i = 2;i < 10;i += 2) { fe25519_square(&t1,&t0); fe25519_square(&t0,&t1); }
|
||||
/* 2^50 - 2^0 */ fe25519_mul(&z2_50_0,&t0,&z2_10_0);
|
||||
|
||||
/* 2^51 - 2^1 */ fe25519_square(&t0,&z2_50_0);
|
||||
/* 2^52 - 2^2 */ fe25519_square(&t1,&t0);
|
||||
/* 2^100 - 2^50 */ for (i = 2;i < 50;i += 2) { fe25519_square(&t0,&t1); fe25519_square(&t1,&t0); }
|
||||
/* 2^100 - 2^0 */ fe25519_mul(&z2_100_0,&t1,&z2_50_0);
|
||||
|
||||
/* 2^101 - 2^1 */ fe25519_square(&t1,&z2_100_0);
|
||||
/* 2^102 - 2^2 */ fe25519_square(&t0,&t1);
|
||||
/* 2^200 - 2^100 */ for (i = 2;i < 100;i += 2) { fe25519_square(&t1,&t0); fe25519_square(&t0,&t1); }
|
||||
/* 2^200 - 2^0 */ fe25519_mul(&t1,&t0,&z2_100_0);
|
||||
|
||||
/* 2^201 - 2^1 */ fe25519_square(&t0,&t1);
|
||||
/* 2^202 - 2^2 */ fe25519_square(&t1,&t0);
|
||||
/* 2^250 - 2^50 */ for (i = 2;i < 50;i += 2) { fe25519_square(&t0,&t1); fe25519_square(&t1,&t0); }
|
||||
/* 2^250 - 2^0 */ fe25519_mul(&t0,&t1,&z2_50_0);
|
||||
|
||||
/* 2^251 - 2^1 */ fe25519_square(&t1,&t0);
|
||||
/* 2^252 - 2^2 */ fe25519_square(&t0,&t1);
|
||||
/* 2^253 - 2^3 */ fe25519_square(&t1,&t0);
|
||||
/* 2^254 - 2^4 */ fe25519_square(&t0,&t1);
|
||||
/* 2^255 - 2^5 */ fe25519_square(&t1,&t0);
|
||||
/* 2^255 - 21 */ fe25519_mul(r,&t1,&z11);
|
||||
}
|
||||
@@ -1,34 +0,0 @@
|
||||
#ifndef GE25519_H
|
||||
#define GE25519_H
|
||||
|
||||
#include "fe25519.h"
|
||||
#include "sc25519.h"
|
||||
|
||||
#define ge25519 crypto_sign_edwards25519sha512batch_ge25519
|
||||
#define ge25519_unpack_vartime crypto_sign_edwards25519sha512batch_ge25519_unpack_vartime
|
||||
#define ge25519_pack crypto_sign_edwards25519sha512batch_ge25519_pack
|
||||
#define ge25519_add crypto_sign_edwards25519sha512batch_ge25519_add
|
||||
#define ge25519_double crypto_sign_edwards25519sha512batch_ge25519_double
|
||||
#define ge25519_scalarmult crypto_sign_edwards25519sha512batch_ge25519_scalarmult
|
||||
#define ge25519_scalarmult_base crypto_sign_edwards25519sha512batch_ge25519_scalarmult_base
|
||||
|
||||
typedef struct {
|
||||
fe25519 x;
|
||||
fe25519 y;
|
||||
fe25519 z;
|
||||
fe25519 t;
|
||||
} ge25519;
|
||||
|
||||
int ge25519_unpack_vartime(ge25519 *r, const unsigned char p[32]);
|
||||
|
||||
void ge25519_pack(unsigned char r[32], const ge25519 *p);
|
||||
|
||||
void ge25519_add(ge25519 *r, const ge25519 *p, const ge25519 *q);
|
||||
|
||||
void ge25519_double(ge25519 *r, const ge25519 *p);
|
||||
|
||||
void ge25519_scalarmult(ge25519 *r, const ge25519 *p, const sc25519 *s);
|
||||
|
||||
void ge25519_scalarmult_base(ge25519 *r, const sc25519 *s);
|
||||
|
||||
#endif
|
||||
-230
@@ -1,230 +0,0 @@
|
||||
#include "fe25519.h"
|
||||
#include "sc25519.h"
|
||||
#include "ge25519.h"
|
||||
|
||||
/*
|
||||
* Arithmetic on the twisted Edwards curve -x^2 + y^2 = 1 + dx^2y^2
|
||||
* with d = -(121665/121666) = 37095705934669439343138083508754565189542113879843219016388785533085940283555
|
||||
* Base point: (15112221349535400772501151409588531511454012693041857206046113283949847762202,46316835694926478169428394003475163141307993866256225615783033603165251855960);
|
||||
*/
|
||||
|
||||
typedef struct
|
||||
{
|
||||
fe25519 x;
|
||||
fe25519 z;
|
||||
fe25519 y;
|
||||
fe25519 t;
|
||||
} ge25519_p1p1;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
fe25519 x;
|
||||
fe25519 y;
|
||||
fe25519 z;
|
||||
} ge25519_p2;
|
||||
|
||||
#define ge25519_p3 ge25519
|
||||
|
||||
/* Windowsize for fixed-window scalar multiplication */
|
||||
#define WINDOWSIZE 2 /* Should be 1,2, or 4 */
|
||||
#define WINDOWMASK ((1<<WINDOWSIZE)-1)
|
||||
|
||||
/* packed parameter d in the Edwards curve equation */
|
||||
static const unsigned char ecd[32] = {0xA3, 0x78, 0x59, 0x13, 0xCA, 0x4D, 0xEB, 0x75, 0xAB, 0xD8, 0x41, 0x41, 0x4D, 0x0A, 0x70, 0x00,
|
||||
0x98, 0xE8, 0x79, 0x77, 0x79, 0x40, 0xC7, 0x8C, 0x73, 0xFE, 0x6F, 0x2B, 0xEE, 0x6C, 0x03, 0x52};
|
||||
|
||||
/* Packed coordinates of the base point */
|
||||
static const unsigned char ge25519_base_x[32] = {0x1A, 0xD5, 0x25, 0x8F, 0x60, 0x2D, 0x56, 0xC9, 0xB2, 0xA7, 0x25, 0x95, 0x60, 0xC7, 0x2C, 0x69,
|
||||
0x5C, 0xDC, 0xD6, 0xFD, 0x31, 0xE2, 0xA4, 0xC0, 0xFE, 0x53, 0x6E, 0xCD, 0xD3, 0x36, 0x69, 0x21};
|
||||
static const unsigned char ge25519_base_y[32] = {0x58, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
|
||||
0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66};
|
||||
static const unsigned char ge25519_base_z[32] = {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
|
||||
static const unsigned char ge25519_base_t[32] = {0xA3, 0xDD, 0xB7, 0xA5, 0xB3, 0x8A, 0xDE, 0x6D, 0xF5, 0x52, 0x51, 0x77, 0x80, 0x9F, 0xF0, 0x20,
|
||||
0x7D, 0xE3, 0xAB, 0x64, 0x8E, 0x4E, 0xEA, 0x66, 0x65, 0x76, 0x8B, 0xD7, 0x0F, 0x5F, 0x87, 0x67};
|
||||
|
||||
/* Packed coordinates of the neutral element */
|
||||
static const unsigned char ge25519_neutral_x[32] = {0};
|
||||
static const unsigned char ge25519_neutral_y[32] = {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
|
||||
static const unsigned char ge25519_neutral_z[32] = {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
|
||||
static const unsigned char ge25519_neutral_t[32] = {0};
|
||||
|
||||
static void p1p1_to_p2(ge25519_p2 *r, const ge25519_p1p1 *p)
|
||||
{
|
||||
fe25519_mul(&r->x, &p->x, &p->t);
|
||||
fe25519_mul(&r->y, &p->y, &p->z);
|
||||
fe25519_mul(&r->z, &p->z, &p->t);
|
||||
}
|
||||
|
||||
static void p1p1_to_p3(ge25519_p3 *r, const ge25519_p1p1 *p)
|
||||
{
|
||||
p1p1_to_p2((ge25519_p2 *)r, p);
|
||||
fe25519_mul(&r->t, &p->x, &p->y);
|
||||
}
|
||||
|
||||
/* Constant-time version of: if(b) r = p */
|
||||
static void cmov_p3(ge25519_p3 *r, const ge25519_p3 *p, unsigned char b)
|
||||
{
|
||||
fe25519_cmov(&r->x, &p->x, b);
|
||||
fe25519_cmov(&r->y, &p->y, b);
|
||||
fe25519_cmov(&r->z, &p->z, b);
|
||||
fe25519_cmov(&r->t, &p->t, b);
|
||||
}
|
||||
|
||||
/* See http://www.hyperelliptic.org/EFD/g1p/auto-twisted-extended-1.html#doubling-dbl-2008-hwcd */
|
||||
static void dbl_p1p1(ge25519_p1p1 *r, const ge25519_p2 *p)
|
||||
{
|
||||
fe25519 a,b,c,d;
|
||||
fe25519_square(&a, &p->x);
|
||||
fe25519_square(&b, &p->y);
|
||||
fe25519_square(&c, &p->z);
|
||||
fe25519_add(&c, &c, &c);
|
||||
fe25519_neg(&d, &a);
|
||||
|
||||
fe25519_add(&r->x, &p->x, &p->y);
|
||||
fe25519_square(&r->x, &r->x);
|
||||
fe25519_sub(&r->x, &r->x, &a);
|
||||
fe25519_sub(&r->x, &r->x, &b);
|
||||
fe25519_add(&r->z, &d, &b);
|
||||
fe25519_sub(&r->t, &r->z, &c);
|
||||
fe25519_sub(&r->y, &d, &b);
|
||||
}
|
||||
|
||||
static void add_p1p1(ge25519_p1p1 *r, const ge25519_p3 *p, const ge25519_p3 *q)
|
||||
{
|
||||
fe25519 a, b, c, d, t, fd;
|
||||
fe25519_unpack(&fd, ecd);
|
||||
|
||||
fe25519_sub(&a, &p->y, &p->x); // A = (Y1-X1)*(Y2-X2)
|
||||
fe25519_sub(&t, &q->y, &q->x);
|
||||
fe25519_mul(&a, &a, &t);
|
||||
fe25519_add(&b, &p->x, &p->y); // B = (Y1+X1)*(Y2+X2)
|
||||
fe25519_add(&t, &q->x, &q->y);
|
||||
fe25519_mul(&b, &b, &t);
|
||||
fe25519_mul(&c, &p->t, &q->t); //C = T1*k*T2
|
||||
fe25519_mul(&c, &c, &fd);
|
||||
fe25519_add(&c, &c, &c); //XXX: Can save this addition by precomputing 2*ecd
|
||||
fe25519_mul(&d, &p->z, &q->z); //D = Z1*2*Z2
|
||||
fe25519_add(&d, &d, &d);
|
||||
fe25519_sub(&r->x, &b, &a); // E = B-A
|
||||
fe25519_sub(&r->t, &d, &c); // F = D-C
|
||||
fe25519_add(&r->z, &d, &c); // G = D+C
|
||||
fe25519_add(&r->y, &b, &a); // H = B+A
|
||||
}
|
||||
|
||||
/* ********************************************************************
|
||||
* EXPORTED FUNCTIONS
|
||||
******************************************************************** */
|
||||
|
||||
/* return 0 on success, -1 otherwise */
|
||||
int ge25519_unpack_vartime(ge25519_p3 *r, const unsigned char p[32])
|
||||
{
|
||||
int ret;
|
||||
fe25519 t, fd;
|
||||
unsigned char par;
|
||||
|
||||
fe25519_setone(&r->z);
|
||||
fe25519_unpack(&fd, ecd);
|
||||
par = p[31] >> 7;
|
||||
fe25519_unpack(&r->y, p);
|
||||
fe25519_square(&r->x, &r->y);
|
||||
fe25519_mul(&t, &r->x, &fd);
|
||||
fe25519_sub(&r->x, &r->x, &r->z);
|
||||
fe25519_add(&t, &r->z, &t);
|
||||
fe25519_invert(&t, &t);
|
||||
fe25519_mul(&r->x, &r->x, &t);
|
||||
ret = fe25519_sqrt_vartime(&r->x, &r->x, par);
|
||||
fe25519_mul(&r->t, &r->x, &r->y);
|
||||
return ret;
|
||||
}
|
||||
|
||||
void ge25519_pack(unsigned char r[32], const ge25519_p3 *p)
|
||||
{
|
||||
fe25519 tx, ty, zi;
|
||||
fe25519_invert(&zi, &p->z);
|
||||
fe25519_mul(&tx, &p->x, &zi);
|
||||
fe25519_mul(&ty, &p->y, &zi);
|
||||
fe25519_pack(r, &ty);
|
||||
r[31] ^= fe25519_getparity(&tx) << 7;
|
||||
}
|
||||
|
||||
void ge25519_add(ge25519_p3 *r, const ge25519_p3 *p, const ge25519_p3 *q)
|
||||
{
|
||||
ge25519_p1p1 grp1p1;
|
||||
add_p1p1(&grp1p1, p, q);
|
||||
p1p1_to_p3(r, &grp1p1);
|
||||
}
|
||||
|
||||
void ge25519_double(ge25519_p3 *r, const ge25519_p3 *p)
|
||||
{
|
||||
ge25519_p1p1 grp1p1;
|
||||
dbl_p1p1(&grp1p1, (const ge25519_p2 *)p);
|
||||
p1p1_to_p3(r, &grp1p1);
|
||||
}
|
||||
|
||||
void ge25519_scalarmult(ge25519_p3 *r, const ge25519_p3 *p, const sc25519 *s)
|
||||
{
|
||||
int i,j,k;
|
||||
ge25519_p3 g;
|
||||
ge25519_p3 pre[(1 << WINDOWSIZE)];
|
||||
ge25519_p3 t;
|
||||
ge25519_p1p1 tp1p1;
|
||||
unsigned char w;
|
||||
unsigned char sb[32];
|
||||
|
||||
fe25519_unpack(&g.x, ge25519_neutral_x);
|
||||
fe25519_unpack(&g.y, ge25519_neutral_y);
|
||||
fe25519_unpack(&g.z, ge25519_neutral_z);
|
||||
fe25519_unpack(&g.t, ge25519_neutral_t);
|
||||
|
||||
sc25519_to32bytes(sb, s);
|
||||
|
||||
// Precomputation
|
||||
pre[0] = g;
|
||||
pre[1] = *p;
|
||||
for(i=2;i<(1<<WINDOWSIZE);i+=2)
|
||||
{
|
||||
dbl_p1p1(&tp1p1, (ge25519_p2 *)(pre+i/2));
|
||||
p1p1_to_p3(pre+i, &tp1p1);
|
||||
add_p1p1(&tp1p1, pre+i, pre+1);
|
||||
p1p1_to_p3(pre+i+1, &tp1p1);
|
||||
}
|
||||
|
||||
// Fixed-window scalar multiplication
|
||||
for(i=32;i>0;i--)
|
||||
{
|
||||
for(j=8-WINDOWSIZE;j>=0;j-=WINDOWSIZE)
|
||||
{
|
||||
for(k=0;k<WINDOWSIZE-1;k++)
|
||||
{
|
||||
dbl_p1p1(&tp1p1, (ge25519_p2 *)&g);
|
||||
p1p1_to_p2((ge25519_p2 *)&g, &tp1p1);
|
||||
}
|
||||
dbl_p1p1(&tp1p1, (ge25519_p2 *)&g);
|
||||
p1p1_to_p3(&g, &tp1p1);
|
||||
// Cache-timing resistant loading of precomputed value:
|
||||
w = (sb[i-1]>>j) & WINDOWMASK;
|
||||
t = pre[0];
|
||||
for(k=1;k<(1<<WINDOWSIZE);k++)
|
||||
cmov_p3(&t, &pre[k], k==w);
|
||||
|
||||
add_p1p1(&tp1p1, &g, &t);
|
||||
if(j != 0) p1p1_to_p2((ge25519_p2 *)&g, &tp1p1);
|
||||
else p1p1_to_p3(&g, &tp1p1); /* convert to p3 representation at the end */
|
||||
}
|
||||
}
|
||||
r->x = g.x;
|
||||
r->y = g.y;
|
||||
r->z = g.z;
|
||||
r->t = g.t;
|
||||
}
|
||||
|
||||
void ge25519_scalarmult_base(ge25519_p3 *r, const sc25519 *s)
|
||||
{
|
||||
/* XXX: Better algorithm for known-base-point scalar multiplication */
|
||||
ge25519_p3 t;
|
||||
fe25519_unpack(&t.x, ge25519_base_x);
|
||||
fe25519_unpack(&t.y, ge25519_base_y);
|
||||
fe25519_unpack(&t.z, ge25519_base_z);
|
||||
fe25519_unpack(&t.t, ge25519_base_t);
|
||||
ge25519_scalarmult(r, &t, s);
|
||||
}
|
||||
@@ -1,51 +0,0 @@
|
||||
#ifndef SC25519_H
|
||||
#define SC25519_H
|
||||
|
||||
#define sc25519 crypto_sign_edwards25519sha512batch_sc25519
|
||||
#define sc25519_from32bytes crypto_sign_edwards25519sha512batch_sc25519_from32bytes
|
||||
#define sc25519_from64bytes crypto_sign_edwards25519sha512batch_sc25519_from64bytes
|
||||
#define sc25519_to32bytes crypto_sign_edwards25519sha512batch_sc25519_to32bytes
|
||||
#define sc25519_pack crypto_sign_edwards25519sha512batch_sc25519_pack
|
||||
#define sc25519_getparity crypto_sign_edwards25519sha512batch_sc25519_getparity
|
||||
#define sc25519_setone crypto_sign_edwards25519sha512batch_sc25519_setone
|
||||
#define sc25519_setzero crypto_sign_edwards25519sha512batch_sc25519_setzero
|
||||
#define sc25519_neg crypto_sign_edwards25519sha512batch_sc25519_neg
|
||||
#define sc25519_add crypto_sign_edwards25519sha512batch_sc25519_add
|
||||
#define sc25519_sub crypto_sign_edwards25519sha512batch_sc25519_sub
|
||||
#define sc25519_mul crypto_sign_edwards25519sha512batch_sc25519_mul
|
||||
#define sc25519_square crypto_sign_edwards25519sha512batch_sc25519_square
|
||||
#define sc25519_invert crypto_sign_edwards25519sha512batch_sc25519_invert
|
||||
|
||||
#include "crypto_uint32.h"
|
||||
|
||||
typedef struct {
|
||||
crypto_uint32 v[32];
|
||||
} sc25519;
|
||||
|
||||
void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]);
|
||||
|
||||
void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]);
|
||||
|
||||
void sc25519_to32bytes(unsigned char r[32], const sc25519 *x);
|
||||
|
||||
void sc25519_pack(unsigned char r[32], const sc25519 *x);
|
||||
|
||||
unsigned char sc25519_getparity(const sc25519 *x);
|
||||
|
||||
void sc25519_setone(sc25519 *r);
|
||||
|
||||
void sc25519_setzero(sc25519 *r);
|
||||
|
||||
void sc25519_neg(sc25519 *r, const sc25519 *x);
|
||||
|
||||
void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y);
|
||||
|
||||
void sc25519_sub(sc25519 *r, const sc25519 *x, const sc25519 *y);
|
||||
|
||||
void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y);
|
||||
|
||||
void sc25519_square(sc25519 *r, const sc25519 *x);
|
||||
|
||||
void sc25519_invert(sc25519 *r, const sc25519 *x);
|
||||
|
||||
#endif
|
||||
-150
@@ -1,150 +0,0 @@
|
||||
#include "sc25519.h"
|
||||
|
||||
/*Arithmetic modulo the group order n = 2^252 + 27742317777372353535851937790883648493 = 7237005577332262213973186563042994240857116359379907606001950938285454250989 */
|
||||
|
||||
static const crypto_uint32 m[32] = {0xED, 0xD3, 0xF5, 0x5C, 0x1A, 0x63, 0x12, 0x58, 0xD6, 0x9C, 0xF7, 0xA2, 0xDE, 0xF9, 0xDE, 0x14,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10};
|
||||
|
||||
static const crypto_uint32 mu[33] = {0x1B, 0x13, 0x2C, 0x0A, 0xA3, 0xE5, 0x9C, 0xED, 0xA7, 0x29, 0x63, 0x08, 0x5D, 0x21, 0x06, 0x21,
|
||||
0xEB, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0F};
|
||||
|
||||
/* Reduce coefficients of r before calling reduce_add_sub */
|
||||
static void reduce_add_sub(sc25519 *r)
|
||||
{
|
||||
int i, b, pb=0, nb;
|
||||
unsigned char t[32];
|
||||
|
||||
for(i=0;i<32;i++)
|
||||
{
|
||||
b = (r->v[i]<pb+m[i]);
|
||||
t[i] = r->v[i]-pb-m[i]+b*256;
|
||||
pb = b;
|
||||
}
|
||||
nb = 1-b;
|
||||
for(i=0;i<32;i++)
|
||||
r->v[i] = r->v[i]*b + t[i]*nb;
|
||||
}
|
||||
|
||||
/* Reduce coefficients of x before calling barrett_reduce */
|
||||
static void barrett_reduce(sc25519 *r, const crypto_uint32 x[64])
|
||||
{
|
||||
/* See HAC, Alg. 14.42 */
|
||||
int i,j;
|
||||
crypto_uint32 q2[66] = {0};
|
||||
crypto_uint32 *q3 = q2 + 33;
|
||||
crypto_uint32 r1[33];
|
||||
crypto_uint32 r2[33] = {0};
|
||||
crypto_uint32 carry;
|
||||
int b, pb=0;
|
||||
|
||||
for(i=0;i<33;i++)
|
||||
for(j=0;j<33;j++)
|
||||
if(i+j >= 31) q2[i+j] += mu[i]*x[j+31];
|
||||
carry = q2[31] >> 8;
|
||||
q2[32] += carry;
|
||||
carry = q2[32] >> 8;
|
||||
q2[33] += carry;
|
||||
|
||||
for(i=0;i<33;i++)r1[i] = x[i];
|
||||
for(i=0;i<32;i++) {
|
||||
for(j=0;j<33;j++) {
|
||||
if(i+j < 33) {
|
||||
/* coverity[overrun-local] */
|
||||
r2[i+j] += m[i]*q3[j];
|
||||
}
|
||||
}
|
||||
}
|
||||
for(i=0;i<32;i++)
|
||||
{
|
||||
carry = r2[i] >> 8;
|
||||
r2[i+1] += carry;
|
||||
r2[i] &= 0xff;
|
||||
}
|
||||
|
||||
for(i=0;i<32;i++)
|
||||
{
|
||||
b = (r1[i]<pb+r2[i]);
|
||||
r->v[i] = r1[i]-pb-r2[i]+b*256;
|
||||
pb = b;
|
||||
}
|
||||
|
||||
/* XXX: Can it really happen that r<0?, See HAC, Alg 14.42, Step 3
|
||||
* If so: Handle it here!
|
||||
*/
|
||||
|
||||
reduce_add_sub(r);
|
||||
reduce_add_sub(r);
|
||||
}
|
||||
|
||||
/*
|
||||
static int iszero(const sc25519 *x)
|
||||
{
|
||||
// Implement
|
||||
return 0;
|
||||
}
|
||||
*/
|
||||
|
||||
void sc25519_from32bytes(sc25519 *r, const unsigned char x[32])
|
||||
{
|
||||
int i;
|
||||
crypto_uint32 t[64] = {0};
|
||||
for(i=0;i<32;i++) t[i] = x[i];
|
||||
barrett_reduce(r, t);
|
||||
}
|
||||
|
||||
void sc25519_from64bytes(sc25519 *r, const unsigned char x[64])
|
||||
{
|
||||
int i;
|
||||
crypto_uint32 t[64] = {0};
|
||||
for(i=0;i<64;i++) t[i] = x[i];
|
||||
barrett_reduce(r, t);
|
||||
}
|
||||
|
||||
/* XXX: What we actually want for crypto_group is probably just something like
|
||||
* void sc25519_frombytes(sc25519 *r, const unsigned char *x, size_t xlen)
|
||||
*/
|
||||
|
||||
void sc25519_to32bytes(unsigned char r[32], const sc25519 *x)
|
||||
{
|
||||
int i;
|
||||
for(i=0;i<32;i++) r[i] = x->v[i];
|
||||
}
|
||||
|
||||
void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y)
|
||||
{
|
||||
int i, carry;
|
||||
for(i=0;i<32;i++) r->v[i] = x->v[i] + y->v[i];
|
||||
for(i=0;i<31;i++)
|
||||
{
|
||||
carry = r->v[i] >> 8;
|
||||
r->v[i+1] += carry;
|
||||
r->v[i] &= 0xff;
|
||||
}
|
||||
reduce_add_sub(r);
|
||||
}
|
||||
|
||||
void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y)
|
||||
{
|
||||
int i,j,carry;
|
||||
crypto_uint32 t[64];
|
||||
for(i=0;i<64;i++)t[i] = 0;
|
||||
|
||||
for(i=0;i<32;i++)
|
||||
for(j=0;j<32;j++)
|
||||
t[i+j] += x->v[i] * y->v[j];
|
||||
|
||||
/* Reduce coefficients */
|
||||
for(i=0;i<63;i++)
|
||||
{
|
||||
carry = t[i] >> 8;
|
||||
t[i+1] += carry;
|
||||
t[i] &= 0xff;
|
||||
}
|
||||
|
||||
barrett_reduce(r, t);
|
||||
}
|
||||
|
||||
void sc25519_square(sc25519 *r, const sc25519 *x)
|
||||
{
|
||||
sc25519_mul(r, x, x);
|
||||
}
|
||||
@@ -1,106 +0,0 @@
|
||||
#include "api.h"
|
||||
#include "crypto_hash_sha512.h"
|
||||
#include "randombytes.h"
|
||||
#include "crypto_verify_32.h"
|
||||
|
||||
#include "ge25519.h"
|
||||
|
||||
int crypto_sign_keypair(
|
||||
unsigned char *pk,
|
||||
unsigned char *sk
|
||||
)
|
||||
{
|
||||
sc25519 scsk;
|
||||
ge25519 gepk;
|
||||
|
||||
randombytes_buf(sk, 32);
|
||||
crypto_hash_sha512(sk, sk, 32);
|
||||
sk[0] &= 248;
|
||||
sk[31] &= 127;
|
||||
sk[31] |= 64;
|
||||
|
||||
sc25519_from32bytes(&scsk,sk);
|
||||
|
||||
ge25519_scalarmult_base(&gepk, &scsk);
|
||||
ge25519_pack(pk, &gepk);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int crypto_sign(
|
||||
unsigned char *sm,unsigned long long *smlen_p,
|
||||
const unsigned char *m,unsigned long long mlen,
|
||||
const unsigned char *sk
|
||||
)
|
||||
{
|
||||
sc25519 sck, scs, scsk;
|
||||
ge25519 ger;
|
||||
unsigned char r[32];
|
||||
unsigned char s[32];
|
||||
unsigned long long i;
|
||||
unsigned char hmg[crypto_hash_sha512_BYTES];
|
||||
unsigned char hmr[crypto_hash_sha512_BYTES];
|
||||
|
||||
if (smlen_p != NULL) {
|
||||
*smlen_p = mlen+64;
|
||||
}
|
||||
for(i=0;i<mlen;i++)
|
||||
sm[32 + i] = m[i];
|
||||
for(i=0;i<32;i++)
|
||||
sm[i] = sk[32+i];
|
||||
crypto_hash_sha512(hmg, sm, mlen+32); /* Generate k as h(m,sk[32],...,sk[63]) */
|
||||
|
||||
sc25519_from64bytes(&sck, hmg);
|
||||
ge25519_scalarmult_base(&ger, &sck);
|
||||
ge25519_pack(r, &ger);
|
||||
|
||||
for(i=0;i<32;i++)
|
||||
sm[i] = r[i];
|
||||
|
||||
crypto_hash_sha512(hmr, sm, mlen+32); /* Compute h(m,r) */
|
||||
sc25519_from64bytes(&scs, hmr);
|
||||
sc25519_mul(&scs, &scs, &sck);
|
||||
|
||||
sc25519_from32bytes(&scsk, sk);
|
||||
sc25519_add(&scs, &scs, &scsk);
|
||||
|
||||
sc25519_to32bytes(s,&scs); /* cat s */
|
||||
for(i=0;i<32;i++)
|
||||
sm[mlen+32+i] = s[i];
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int crypto_sign_open(
|
||||
unsigned char *m,unsigned long long *mlen_p,
|
||||
const unsigned char *sm,unsigned long long smlen,
|
||||
const unsigned char *pk
|
||||
)
|
||||
{
|
||||
unsigned long long i;
|
||||
unsigned char t1[32], t2[32];
|
||||
ge25519 get1, get2, gepk;
|
||||
sc25519 schmr, scs;
|
||||
unsigned char hmr[crypto_hash_sha512_BYTES];
|
||||
|
||||
if (ge25519_unpack_vartime(&get1, sm)) return -1;
|
||||
if (ge25519_unpack_vartime(&gepk, pk)) return -1;
|
||||
|
||||
crypto_hash_sha512(hmr,sm,smlen-32);
|
||||
|
||||
sc25519_from64bytes(&schmr, hmr);
|
||||
ge25519_scalarmult(&get1, &get1, &schmr);
|
||||
ge25519_add(&get1, &get1, &gepk);
|
||||
ge25519_pack(t1, &get1);
|
||||
|
||||
sc25519_from32bytes(&scs, &sm[smlen-32]);
|
||||
ge25519_scalarmult_base(&get2, &scs);
|
||||
ge25519_pack(t2, &get2);
|
||||
|
||||
for(i=0;i<smlen-64;i++) {
|
||||
m[i] = sm[i + 32];
|
||||
}
|
||||
if (mlen_p != NULL) {
|
||||
*mlen_p = smlen-64;
|
||||
}
|
||||
return crypto_verify_32(t1, t2);
|
||||
}
|
||||
@@ -1,16 +0,0 @@
|
||||
#include "crypto_sign_edwards25519sha512batch.h"
|
||||
|
||||
size_t
|
||||
crypto_sign_edwards25519sha512batch_bytes(void) {
|
||||
return crypto_sign_edwards25519sha512batch_BYTES;
|
||||
}
|
||||
|
||||
size_t
|
||||
crypto_sign_edwards25519sha512batch_publickeybytes(void) {
|
||||
return crypto_sign_edwards25519sha512batch_PUBLICKEYBYTES;
|
||||
}
|
||||
|
||||
size_t
|
||||
crypto_sign_edwards25519sha512batch_secretkeybytes(void) {
|
||||
return crypto_sign_edwards25519sha512batch_SECRETKEYBYTES;
|
||||
}
|
||||
Reference in New Issue
Block a user