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comparison src/keypair.c @ 64:fa53d1c54886

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Use default RNG for key generation, added options to generate public key from private key, use bundled tweetnacl as fallback instead of nacl download
author Ivo Smits <Ivo@UFO-Net.nl>
date Sat, 07 Jan 2017 18:07:27 +0100
parents dfac56805c77
children
comparison
equal deleted inserted replaced
63:fa4983c5f7ea 64:fa53d1c54886
24 or implied, of Ivo Smits.*/ 24 or implied, of Ivo Smits.*/
25 25
26 #include "common.c" 26 #include "common.c"
27 #include "crypto_box_curve25519xsalsa20poly1305.h" 27 #include "crypto_box_curve25519xsalsa20poly1305.h"
28 #include "crypto_scalarmult_curve25519.h" 28 #include "crypto_scalarmult_curve25519.h"
29 #include <time.h>
30 #include <fcntl.h> 29 #include <fcntl.h>
30 #include <unistd.h>
31 31
32 int main() { 32 int main(int argc, char** argv) {
33 print_header(); 33 print_header();
34 34
35 unsigned char cpublickey[crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES]; 35 unsigned char cpublickey[crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES];
36 unsigned char csecretkey[crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES]; 36 unsigned char csecretkey[crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES];
37 int input_mode = 0; //0=generate random, 1=read from argument
38 int output_mode = 0; //0=human readable, 1=space separated, 2=concatenated binary
37 int i; 39 int i;
38 40
39 fprintf(stderr, "Please feed 32 bytes of random data to stdin.\n"); 41 for (i = 1; i < argc; i++) {
40 fprintf(stderr, "Example (slow but secure): quicktun.keypair < /dev/random\n"); 42 char* a = argv[i];
41 fprintf(stderr, "Example (fast but insecure): quicktun.keypair < /dev/urandom\n"); 43 if (!strcmp(a, "-h") || !strcmp(a, "--help")) {
44 printf("Please read the documentation at http://wiki.ucis.nl/QuickTun\n");
45 return 0;
46 } else if (!strcmp(a, "-v") || !strcmp(a, "--version")) {
47 printf("UCIS QuickTun "QT_VERSION"\n");
48 return 0;
49 } else if (!strcmp(a, "-i")) {
50 i++;
51 if (i >= argc) return errorexit("Missing argument for -i");
52 if (!hex2bin(csecretkey, argv[i], crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES)) return errorexit("Invalid secret key argument");
53 input_mode = 1;
54 } else if (!strcmp(a, "-f")) {
55 int len = fread(csecretkey, 1, crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES, stdin);
56 if (len < crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES) return errorexitp("Error or end of file on STDIN");
57 input_mode = 1;
58 } else if (!strcmp(a, "-o")) {
59 i++;
60 a = argv[i];
61 if (i >= argc) return errorexit("Missing argument for -o");
62 if (!strcmp(a, "human")) output_mode = 0;
63 else if (!strcmp(a, "space")) output_mode = 1;
64 else if (!strcmp(a, "bin")) output_mode = 2;
65 else return errorexit("Invalid argument specified for -o");
66 } else {
67 return errorexit("Unexpected command line argument");
68 }
69 }
42 70
43 int len = fread(csecretkey, 1, crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES, stdin); 71 if (input_mode == 0) {
44 if (len < crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES) return errorexitp("Error or end of file on STDIN"); 72 crypto_box_curve25519xsalsa20poly1305_keypair(cpublickey, csecretkey);
45 /* char* b; 73 } else {
46 srand(time(NULL)); 74 crypto_scalarmult_curve25519_base(cpublickey, csecretkey);
47 for (b = csecretkey; b < csecretkey + crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES; b++) *b = rand() % 255;*/ 75 }
48 76
49 crypto_scalarmult_curve25519_base(cpublickey, csecretkey); 77 if (output_mode == 2) {
78 fwrite(csecretkey, 1, crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES, stdout);
79 fwrite(cpublickey, 1, crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES, stdout);
80 } else if (output_mode == 1) {
81 for (i = 0; i < crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES; i++) printf("%02x", csecretkey[i]);
82 printf(" ");
83 for (i = 0; i < crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES; i++) printf("%02x", cpublickey[i]);
84 printf("\n");
85 } else {
86 printf("SECRET: ");
87 for (i = 0; i < crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES; i++) printf("%02x", csecretkey[i]);
88 printf("\n");
50 89
51 printf("SECRET: "); 90 printf("PUBLIC: ");
52 for (i = 0; i < crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES; i++) printf("%02x", csecretkey[i]); 91 for (i = 0; i < crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES; i++) printf("%02x", cpublickey[i]);
53 printf("\n"); 92 printf("\n");
54 93 }
55 printf("PUBLIC: ");
56 for (i = 0; i < crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES; i++) printf("%02x", cpublickey[i]);
57 printf("\n");
58 94
59 return 0; 95 return 0;
60 } 96 }