72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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#include "tomcrypt.h"
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#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L
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#include <libgen.h>
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#else
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#define basename(x) x
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#endif
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/**
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@file demo_crypt_sizes.c
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Demo how to get various sizes to dynamic languages
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like Python - Larry Bugbee, February 2013
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*/
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static void s_print_line(const char* cmd, const char* desc)
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{
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printf(" %-16s - %s\n", cmd, desc);
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}
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int main(int argc, char **argv)
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{
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if (argc == 1) {
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/* given a specific size name, get and print its size */
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char name[] = "ltc_hash_descriptor";
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unsigned int size;
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char *sizes_list;
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unsigned int sizes_list_len;
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if (crypt_get_size(name, &size) != 0) exit(EXIT_FAILURE);
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printf("\n size of '%s' is %u \n\n", name, size);
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/* get and print the length of the names (and sizes) list */
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if (crypt_list_all_sizes(NULL, &sizes_list_len) != 0) exit(EXIT_FAILURE);
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printf(" need to allocate %u bytes \n\n", sizes_list_len);
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/* get and print the names (and sizes) list */
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if ((sizes_list = malloc(sizes_list_len)) == NULL) exit(EXIT_FAILURE);
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if (crypt_list_all_sizes(sizes_list, &sizes_list_len) != 0) exit(EXIT_FAILURE);
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printf(" supported sizes:\n\n%s\n\n", sizes_list);
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free(sizes_list);
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} else if (argc == 2) {
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if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) {
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char* base = strdup(basename(argv[0]));
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printf("Usage: %s [-a] [-s name]\n\n", base);
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s_print_line("<no argument>", "The old behavior of the demo");
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s_print_line("-a", "Only lists all sizes");
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s_print_line("-s name", "List a single size given as argument");
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s_print_line("-h", "The help you're looking at");
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free(base);
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} else if (strcmp(argv[1], "-a") == 0) {
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char *sizes_list;
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unsigned int sizes_list_len;
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/* get and print the length of the names (and sizes) list */
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if (crypt_list_all_sizes(NULL, &sizes_list_len) != 0) exit(EXIT_FAILURE);
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/* get and print the names (and sizes) list */
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if ((sizes_list = malloc(sizes_list_len)) == NULL) exit(EXIT_FAILURE);
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if (crypt_list_all_sizes(sizes_list, &sizes_list_len) != 0) exit(EXIT_FAILURE);
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printf("%s\n", sizes_list);
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free(sizes_list);
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}
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} else if (argc == 3) {
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if (strcmp(argv[1], "-s") == 0) {
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unsigned int size;
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if (crypt_get_size(argv[2], &size) != 0) exit(EXIT_FAILURE);
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printf("%s,%u\n", argv[2], size);
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}
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}
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return 0;
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}
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