Mercurial > dropbear
annotate libtomcrypt/src/pk/ecc/ecc_test.c @ 1333:6fafb500de88
reduce buf->pos if shrinking
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sat, 13 May 2017 23:43:09 +0800 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
rev | line source |
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382
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
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2 * |
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3 * LibTomCrypt is a library that provides various cryptographic |
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4 * algorithms in a highly modular and flexible manner. |
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5 * |
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6 * The library is free for all purposes without any express |
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7 * guarantee it works. |
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8 * |
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9 * Tom St Denis, [email protected], http://libtomcrypt.com |
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10 */ |
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11 |
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12 /* Implements ECC over Z/pZ for curve y^2 = x^3 - 3x + b |
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13 * |
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14 * All curves taken from NIST recommendation paper of July 1999 |
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15 * Available at http://csrc.nist.gov/cryptval/dss.htm |
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16 */ |
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17 #include "tomcrypt.h" |
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18 |
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19 /** |
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20 @file ecc_test.c |
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21 ECC Crypto, Tom St Denis |
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22 */ |
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23 |
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24 #ifdef MECC |
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25 |
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26 /** |
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27 Perform on the ECC system |
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28 @return CRYPT_OK if successful |
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29 */ |
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30 int ecc_test(void) |
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31 { |
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32 void *modulus, *order; |
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33 ecc_point *G, *GG; |
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34 int i, err, primality; |
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35 |
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36 if ((err = mp_init_multi(&modulus, &order, NULL)) != CRYPT_OK) { |
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37 return err; |
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38 } |
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39 |
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40 G = ltc_ecc_new_point(); |
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41 GG = ltc_ecc_new_point(); |
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42 if (G == NULL || GG == NULL) { |
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43 mp_clear_multi(modulus, order, NULL); |
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44 ltc_ecc_del_point(G); |
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45 ltc_ecc_del_point(GG); |
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46 return CRYPT_MEM; |
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47 } |
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48 |
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49 for (i = 0; ltc_ecc_sets[i].size; i++) { |
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50 #if 0 |
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51 printf("Testing %d\n", ltc_ecc_sets[i].size); |
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52 #endif |
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53 if ((err = mp_read_radix(modulus, (char *)ltc_ecc_sets[i].prime, 16)) != CRYPT_OK) { goto done; } |
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54 if ((err = mp_read_radix(order, (char *)ltc_ecc_sets[i].order, 16)) != CRYPT_OK) { goto done; } |
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55 |
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56 /* is prime actually prime? */ |
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57 if ((err = mp_prime_is_prime(modulus, 8, &primality)) != CRYPT_OK) { goto done; } |
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58 if (primality == 0) { |
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59 err = CRYPT_FAIL_TESTVECTOR; |
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60 goto done; |
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61 } |
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62 |
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63 /* is order prime ? */ |
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64 if ((err = mp_prime_is_prime(order, 8, &primality)) != CRYPT_OK) { goto done; } |
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65 if (primality == 0) { |
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66 err = CRYPT_FAIL_TESTVECTOR; |
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67 goto done; |
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68 } |
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69 |
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70 if ((err = mp_read_radix(G->x, (char *)ltc_ecc_sets[i].Gx, 16)) != CRYPT_OK) { goto done; } |
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71 if ((err = mp_read_radix(G->y, (char *)ltc_ecc_sets[i].Gy, 16)) != CRYPT_OK) { goto done; } |
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72 mp_set(G->z, 1); |
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73 |
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74 /* then we should have G == (order + 1)G */ |
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75 if ((err = mp_add_d(order, 1, order)) != CRYPT_OK) { goto done; } |
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76 if ((err = ltc_mp.ecc_ptmul(order, G, GG, modulus, 1)) != CRYPT_OK) { goto done; } |
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77 if (mp_cmp(G->x, GG->x) != LTC_MP_EQ || mp_cmp(G->y, GG->y) != LTC_MP_EQ) { |
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78 err = CRYPT_FAIL_TESTVECTOR; |
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79 goto done; |
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80 } |
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parents:
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81 } |
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82 err = CRYPT_OK; |
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parents:
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83 done: |
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84 ltc_ecc_del_point(GG); |
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Matt Johnston <matt@ucc.asn.au>
parents:
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85 ltc_ecc_del_point(G); |
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Matt Johnston <matt@ucc.asn.au>
parents:
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86 mp_clear_multi(order, modulus, NULL); |
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Matt Johnston <matt@ucc.asn.au>
parents:
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87 return err; |
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parents:
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88 } |
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parents:
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89 |
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parents:
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90 #endif |
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parents:
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91 |
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parents:
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92 /* $Source: /cvs/libtom/libtomcrypt/src/pk/ecc/ecc_test.c,v $ */ |
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Matt Johnston <matt@ucc.asn.au>
parents:
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93 /* $Revision: 1.10 $ */ |
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Matt Johnston <matt@ucc.asn.au>
parents:
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94 /* $Date: 2006/12/04 02:19:48 $ */ |
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Matt Johnston <matt@ucc.asn.au>
parents:
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95 |