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annotate libtomcrypt/demos/constants.c @ 1505:55120acb9994

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Add Spectre v2 mitigations for GCC (#54)
author Loganaden Velvindron <logan@hackers.mu>
date Fri, 16 Feb 2018 19:35:32 +0400
parents 6dba84798cd5
children e9dba7abd939
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1471
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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 #include "tomcrypt.h"
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10
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11 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L
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12 #include <libgen.h>
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13 #else
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14 #define basename(x) x
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15 #endif
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16
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17 /**
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18 @file demo_crypt_constants.c
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19
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20 Demo how to get various constants to dynamic languages
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21 like Python
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22
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23 Larry Bugbee, February 2013
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24 */
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25
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26 static void _print_line(const char* cmd, const char* desc)
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27 {
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28 printf(" %-16s - %s\n", cmd, desc);
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29 }
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30
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31 int main(int argc, char **argv)
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32 {
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33 if (argc == 1) {
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34 /* given a specific constant name, get and print its value */
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35 char name[] = "CTR_COUNTER_BIG_ENDIAN";
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36 int value;
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37 char *names_list;
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38 unsigned int names_list_len;
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39
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40 if (crypt_get_constant(name, &value) != 0) exit(EXIT_FAILURE);
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41 printf("\n %s is %d \n\n", name, value);
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42
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43 /* get and print the length of the names (and values) list */
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44
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45 if (crypt_list_all_constants(NULL, &names_list_len) != 0) exit(EXIT_FAILURE);
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46 printf(" need to allocate %u bytes \n\n", names_list_len);
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47
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48 /* get and print the names (and values) list */
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49 if ((names_list = malloc(names_list_len)) == NULL) exit(EXIT_FAILURE);
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50 if (crypt_list_all_constants(names_list, &names_list_len) != 0) exit(EXIT_FAILURE);
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51 printf(" supported constants:\n\n%s\n\n", names_list);
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52 free(names_list);
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53 } else if (argc == 2) {
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54 if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) {
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55 char* base = strdup(basename(argv[0]));
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56 printf("Usage: %s [-a] [-s name]\n\n", base);
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57 _print_line("<no argument>", "The old behavior of the demo");
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58 _print_line("-a", "Only lists all constants");
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59 _print_line("-s name", "List a single constant given as argument");
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60 _print_line("-h", "The help you're looking at");
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61 free(base);
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62 } else if (strcmp(argv[1], "-a") == 0) {
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63 char *names_list;
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64 unsigned int names_list_len;
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65 /* get and print the length of the names (and values) list */
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66 if (crypt_list_all_constants(NULL, &names_list_len) != 0) exit(EXIT_FAILURE);
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67 /* get and print the names (and values) list */
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68 names_list = malloc(names_list_len);
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69 if (crypt_list_all_constants(names_list, &names_list_len) != 0) exit(EXIT_FAILURE);
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70 printf("%s\n", names_list);
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71 }
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72 } else if (argc == 3) {
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73 if (strcmp(argv[1], "-s") == 0) {
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74 int value;
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75 if (crypt_get_constant(argv[2], &value) != 0) exit(EXIT_FAILURE);
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76 printf("%s,%u\n", argv[2], value);
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77 }
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78 }
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79
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80 return 0;
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81 }
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82
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83
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84 /* ref: $Format:%D$ */
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85 /* git commit: $Format:%H$ */
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86 /* commit time: $Format:%ai$ */