js/scrypt-genpass
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Add keyfile support. Not entirely working yet.

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This commit is contained in:
Chris Oei 2012-09-03 10:41:14 -07:00
parent 5a3a8506fc
commit 3dd81551c6
3 changed files with 52 additions and 9 deletions
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6
lib/genpass/genpass.c
View file

@ -152,18 +152,18 @@ bintohex(char* outstring, size_t nbytes, uint8_t* data)
}
int
sha256string(uint8_t hash[32], char* s)
sha256string(uint8_t hash[32], uint8_t* s, int n)
{
SHA256_CTX sha256_ctx;
SHA256_Init(&sha256_ctx);
SHA256_Update(&sha256_ctx, (void*) s, strlen(s));
SHA256_Update(&sha256_ctx, (void*) s, n);
SHA256_Final(hash, &sha256_ctx);
}
static int
getsalt(uint8_t salt[32], void* site)
{
sha256string(salt, site);
sha256string(salt, site, strlen(site));
char buf[65];
bintohex(buf, 32, salt);
printf("Site hex: %s\n", buf);

2
lib/genpass/genpass.h
View file

@ -73,7 +73,7 @@
*/
int bintohex(char* outstring, size_t nbytes, uint8_t* data);
int sha256string(uint8_t* hash, char* s);
int sha256string(uint8_t* hash, uint8_t* s, int n);
int genpass(uint8_t dk[64],
const uint8_t * passwd, size_t passwdlen, void* site,

53
main.c
View file

@ -41,7 +41,7 @@ usage(void)
{
fprintf(stderr,
"usage: scrypt-genpass [-m MAXMEM] [-o MAXOPS] [-p PASS] <site>\n");
"usage: scrypt-genpass [-m MAXMEM] [-o MAXOPS] [-k KEYFILE] [-p PASS] <site>\n");
exit(1);
}
@ -51,9 +51,11 @@ main(int argc, char *argv[])
FILE * infile = NULL;
FILE * outfile = stdout;
int dec = 0;
int passwdlen = 0;
uint32_t maxmem = 1000;
uint32_t megaops = 32;
char ch;
char * keyfile = NULL;
char * passwd = NULL;
int rc;
int i;
@ -66,8 +68,10 @@ main(int argc, char *argv[])
usage();
/* Parse arguments. */
while ((ch = getopt(argc, argv, "hm:o:p:")) != -1) {
while ((ch = getopt(argc, argv, "hk:m:o:p:")) != -1) {
switch (ch) {
case 'k':
keyfile = strdup(optarg);
case 'm':
maxmem = atoi(optarg);
break;
@ -94,19 +98,52 @@ main(int argc, char *argv[])
dec ? NULL : "Please confirm passphrase", 1))
exit(1);
}
passwdlen = strlen(passwd);
if (keyfile) {
FILE *fp;
size_t keyfilelen;
fp = fopen(keyfile, "rb");
if (fp) {
fseek(fp, 0, SEEK_END);
keyfilelen = ftell(fp);
fseek(fp, 0, SEEK_SET);
printf("DEBUG: keyfilelen = %d\n", keyfilelen);
uint8_t* combinedkey = malloc(passwdlen + keyfilelen + 1);
if (combinedkey) {
strcpy(combinedkey, passwd);
memset(passwd, 0, passwdlen);
free(passwd);
int n = fread(combinedkey + passwdlen, keyfilelen, 1, fp);
/* n == number of items read == 1 */
fclose(fp);
printf("DEBUG: n = %d\n", n);
passwd = combinedkey;
passwdlen += keyfilelen;
printf("DEBUG: combinedkey = %s\n", passwd);
} else {
rc = 15;
}
} else {
rc = 14;
}
}
uint8_t passhash[32];
sha256string(passhash, passwd);
sha256string(passhash, passwd, passwdlen);
char buf1[65];
bintohex(buf1, 32, passhash);
printf("Master hex: %s\n", buf1);
uint8_t dk[64];
rc = genpass(dk, (uint8_t *)passwd, strlen(passwd), (void*) *argv,
rc = genpass(dk, (uint8_t *)passwd, passwdlen, (void*) *argv,
maxmem, megaops);
/* Zero and free the password. */
memset(passwd, 0, strlen(passwd));
memset(passwd, 0, passwdlen);
free(passwd);
free(keyfile);
char buf[129];
bintohex(buf, 64, dk);
@ -155,6 +192,12 @@ main(int argc, char *argv[])
case 13:
warn("Error reading file: %s", argv[0]);
break;
case 14:
warn("Unable to open keyfile: %s", keyfile);
break;
case 15:
warn("Unable to allocate memory for combined key");
break;
}
exit(1);
}