js/scrypt-genpass
Archived
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Create salt using SHA256 of site name

Browse source
This commit is contained in:
Chris Oei 2012-09-02 22:08:52 -07:00
parent 87ba1c22e9
commit d8d6735872
3 changed files with 12 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

26
lib/genpass/genpass.c
View file

@ -49,7 +49,7 @@
static int pickparams(uint32_t, uint32_t,
int *, uint32_t *, uint32_t *);
static int checkparams(uint32_t, uint32_t, int, uint32_t, uint32_t);
static int getsalt(uint8_t[32]);
static int getsalt(uint8_t[32], void* site);
static int
pickparams(uint32_t maxmem, uint32_t megaops,
@ -142,26 +142,18 @@ checkparams(uint32_t maxmem, uint32_t megaops,
}
static int
getsalt(uint8_t salt[32])
getsalt(uint8_t salt[32], void* site)
{
uint8_t randomdata[32] = {
0x67, 0x18, 0x53, 0x16 , 0xdc, 0x1e, 0x95, 0xd2,
0x78, 0x49, 0xc3, 0x99, 0xe6, 0x6f, 0x07, 0xc1,
0xa7, 0x0d, 0x02, 0x07, 0x0f, 0x24, 0xbb, 0xfa,
0xf5, 0xb5, 0x42, 0x72, 0x94, 0x9b, 0x35, 0xa6
};
int i;
for (i = 0; i < 32; i++)
salt[i] = randomdata[i];
/* Success! */
SHA256_CTX sha256_ctx;
SHA256_Init(&sha256_ctx);
SHA256_Update(&sha256_ctx, site, strlen(site));
SHA256_Final(salt, &sha256_ctx);
return (0);
}
int
genpass(uint8_t dk[64],
const uint8_t * passwd, size_t passwdlen,
const uint8_t * passwd, size_t passwdlen, void* site,
uint32_t maxmem, uint32_t megaops)
{
uint8_t salt[32];
@ -181,8 +173,8 @@ genpass(uint8_t dk[64],
return (rc);
N = (uint64_t)(1) << logN;
/* Get some salt. */
if ((rc = getsalt(salt)) != 0)
/* Get some salt using the site. */
if ((rc = getsalt(salt, site)) != 0)
return (rc);
/* Generate the derived keys. */

2
lib/genpass/genpass.h
View file

@ -73,7 +73,7 @@
*/
int genpass(uint8_t dk[64],
const uint8_t * passwd, size_t passwdlen,
const uint8_t * passwd, size_t passwdlen, void* site,
uint32_t maxmem, uint32_t megaops);
#endif /* !_GENPASS_H_ */