Mercurial > dropbear

annotate libtomcrypt/testprof/dsa_test.c @ 1607:0bdbb9ecc403

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avoid leak of ecdh public key
author Matt Johnston <matt@ucc.asn.au>
date Thu, 08 Mar 2018 23:51:33 +0800
parents f849a5ca2efc
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include <tomcrypt_test.h>
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2
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f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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3 #ifdef LTC_MDSA
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4
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5 int dsa_test(void)
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6 {
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7 unsigned char msg[16], out[1024], out2[1024];
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8 unsigned long x, y;
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9 int stat1, stat2;
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10 dsa_key key, key2;
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11
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12 /* make a random key */
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13 DO(dsa_make_key(&yarrow_prng, find_prng("yarrow"), 20, 128, &key));
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15 /* verify it */
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16 DO(dsa_verify_key(&key, &stat1));
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17 if (stat1 == 0) { fprintf(stderr, "dsa_verify_key "); return 1; }
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19 /* encrypt a message */
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20 for (x = 0; x < 16; x++) { msg[x] = x; }
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21 x = sizeof(out);
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22 DO(dsa_encrypt_key(msg, 16, out, &x, &yarrow_prng, find_prng("yarrow"), find_hash("sha1"), &key));
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23
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24 /* decrypt */
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25 y = sizeof(out2);
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26 DO(dsa_decrypt_key(out, x, out2, &y, &key));
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27
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28 if (y != 16 || memcmp(out2, msg, 16)) {
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29 fprintf(stderr, "dsa_decrypt failed, y == %lu\n", y);
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30 return 1;
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31 }
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33 /* sign the message */
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34 x = sizeof(out);
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35 DO(dsa_sign_hash(msg, sizeof(msg), out, &x, &yarrow_prng, find_prng("yarrow"), &key));
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37 /* verify it once */
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38 DO(dsa_verify_hash(out, x, msg, sizeof(msg), &stat1, &key));
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39
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40 /* Modify and verify again */
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41 msg[0] ^= 1;
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42 DO(dsa_verify_hash(out, x, msg, sizeof(msg), &stat2, &key));
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43 msg[0] ^= 1;
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44 if (!(stat1 == 1 && stat2 == 0)) { fprintf(stderr, "dsa_verify %d %d", stat1, stat2); return 1; }
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45
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46 /* test exporting it */
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47 x = sizeof(out2);
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48 DO(dsa_export(out2, &x, PK_PRIVATE, &key));
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49 DO(dsa_import(out2, x, &key2));
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50
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51 /* verify a signature with it */
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52 DO(dsa_verify_hash(out, x, msg, sizeof(msg), &stat1, &key2));
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53 if (stat1 == 0) { fprintf(stderr, "dsa_verify (import private) %d ", stat1); return 1; }
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54 dsa_free(&key2);
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55
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56 /* export as public now */
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57 x = sizeof(out2);
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58 DO(dsa_export(out2, &x, PK_PUBLIC, &key));
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59
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60 DO(dsa_import(out2, x, &key2));
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61 /* verify a signature with it */
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62 DO(dsa_verify_hash(out, x, msg, sizeof(msg), &stat1, &key2));
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63 if (stat1 == 0) { fprintf(stderr, "dsa_verify (import public) %d ", stat1); return 1; }
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64 dsa_free(&key2);
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65 dsa_free(&key);
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66
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67 return 0;
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68 }
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69
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70 #else
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71
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72 int dsa_test(void)
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73 {
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74 fprintf(stderr, "NOP");
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75 return 0;
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76 }
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77
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78 #endif
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79
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80 /* $Source$ */
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81 /* $Revision$ */
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82 /* $Date$ */