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/[ttssh2]/trunk/ttssh2/ttxssh/ed25519_ge25519.c

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revision 5496 by yutakapon, Mon Mar 3 06:59:21 2014 UTC revision 5497 by yutakapon, Mon Mar 3 07:50:28 2014 UTC
# Line 6  Line 6 
6   * Copied from supercop-20130419/crypto_sign/ed25519/ref/ge25519.c   * Copied from supercop-20130419/crypto_sign/ed25519/ref/ge25519.c
7   */   */
8    
9  #include "includes.h"  //#include "includes.h"
10    
11  #include "fe25519.h"  #include "ed25519_fe25519.h"
12  #include "sc25519.h"  #include "ed25519_sc25519.h"
13  #include "ge25519.h"  #include "ed25519_ge25519.h"
14    
15  /*  /*
16   * Arithmetic on the twisted Edwards curve -x^2 + y^2 = 1 + dx^2y^2   * Arithmetic on the twisted Edwards curve -x^2 + y^2 = 1 + dx^2y^2
# Line 164  static unsigned char negative(signed cha Line 164  static unsigned char negative(signed cha
164  {  {
165    unsigned long long x = b; /* 18446744073709551361..18446744073709551615: yes; 0..255: no */    unsigned long long x = b; /* 18446744073709551361..18446744073709551615: yes; 0..255: no */
166    x >>= 63; /* 1: yes; 0: no */    x >>= 63; /* 1: yes; 0: no */
167    return x;    return (unsigned char)x;
168  }  }
169    
170  static void choose_t(ge25519_aff *t, unsigned long long pos, signed char b)  static void choose_t(ge25519_aff *t, unsigned long long pos, signed char b)
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