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Add crypto_pwhash_scryptxsalsa208sha256_str()

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This commit is contained in:
Frank Denis 2014-05-07 15:14:12 -07:00
parent a234e505f9
commit 4ef1a332d1
3 changed files with 85 additions and 5 deletions
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8
src/libsodium/crypto_pwhash/scryptxsalsa208sha256/crypto_scrypt-common.c
View File

@ -29,8 +29,7 @@
#define BYTES2CHARS(bytes) \
((((bytes) * 8) + 5) / 6)
#define HASH_SIZE 32 /* bytes */
#define HASH_LEN BYTES2CHARS(HASH_SIZE) /* base-64 chars */
#define HASH_LEN BYTES2CHARS(crypto_pwhash_scryptxsalsa208sha256_STRHASHBYTES) /* base-64 chars */
static const char * const itoa64 =
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
@ -113,7 +112,7 @@ uint8_t *
escrypt_r(escrypt_local_t * local, const uint8_t * passwd, size_t passwdlen,
const uint8_t * setting, uint8_t * buf, size_t buflen)
{
uint8_t hash[HASH_SIZE];
uint8_t hash[crypto_pwhash_scryptxsalsa208sha256_STRHASHBYTES];
escrypt_kdf_t escrypt_kdf;
const uint8_t *src;
const uint8_t *salt;
@ -186,7 +185,8 @@ escrypt_gensalt_r(uint32_t N_log2, uint32_t r, uint32_t p,
uint8_t * buf, size_t buflen)
{
uint8_t *dst;
size_t prefixlen = 3 + 1 + 5 + 5;
size_t prefixlen =
(sizeof "$7$" - 1U) + (1U /* N_log2 */) + (5U /* r */) + (5U /* p */);
size_t saltlen = BYTES2CHARS(srclen);
size_t need;

62
src/libsodium/crypto_pwhash/scryptxsalsa208sha256/pwhash_scryptxsalsa208sha256.c
View File

@ -6,6 +6,12 @@
#include "crypto_pwhash_scryptxsalsa208sha256.h"
#include "crypto_scrypt.h"
#include "randombytes.h"
#define BYTES2CHARS(bytes) ((((bytes) * 8) + 5) / 6)
#define SETTING_SIZE(saltbytes) \
(sizeof "$7$" - 1U) + \
(1U /* N_log2 */) + (5U /* r */) + (5U /* p */) + BYTES2CHARS(saltbytes)
static int
pickparams(const size_t memlimit, unsigned long long opslimit,
@ -48,6 +54,12 @@ crypto_pwhash_scryptxsalsa208sha256_saltbytes(void)
return crypto_pwhash_scryptxsalsa208sha256_SALTBYTES;
}
size_t
crypto_pwhash_scryptxsalsa208sha256_strbytes(void)
{
return crypto_pwhash_scryptxsalsa208sha256_STRBYTES;
}
int
crypto_pwhash_scryptxsalsa208sha256(unsigned char * const out,
unsigned long long outlen,
@ -75,3 +87,53 @@ crypto_pwhash_scryptxsalsa208sha256(unsigned char * const out,
(uint64_t) (1) << N_log2, r, p,
out, (size_t) outlen);
}
int
crypto_pwhash_scryptxsalsa208sha256_str(char * const out,
const char * const passwd,
unsigned long long passwdlen,
size_t memlimit,
unsigned long long opslimit)
{
uint8_t salt[crypto_pwhash_scryptxsalsa208sha256_STRSALTBYTES];
char setting[crypto_pwhash_scryptxsalsa208sha256_STRSETTINGBYTES + 1U];
escrypt_local_t escrypt_local;
uint32_t N_log2;
uint32_t p;
uint32_t r;
if (passwdlen > SIZE_MAX) {
errno = EFBIG;
return -1;
}
if (pickparams(memlimit, opslimit, &N_log2, &p, &r) != 0) {
errno = EINVAL;
return -1;
}
randombytes_buf(salt, sizeof salt);
if (escrypt_gensalt_r(N_log2, r, p, salt, sizeof salt,
(uint8_t *) setting, sizeof setting) == NULL) {
errno = EINVAL;
return -1;
}
if (escrypt_init_local(&escrypt_local) != 0) {
return -1;
}
if (escrypt_r(&escrypt_local, (const uint8_t *) passwd, (size_t) passwdlen,
(const uint8_t *) setting, (uint8_t *) out,
crypto_pwhash_scryptxsalsa208sha256_STRBYTES) == NULL) {
errno = EINVAL;
return -1;
}
escrypt_free_local(&escrypt_local);
(void) sizeof
(int[SETTING_SIZE(crypto_pwhash_scryptxsalsa208sha256_STRSALTBYTES)
== crypto_pwhash_scryptxsalsa208sha256_STRSETTINGBYTES ? 1 : -1]);
(void) sizeof
(int[crypto_pwhash_scryptxsalsa208sha256_STRSETTINGBYTES + 1U +
crypto_pwhash_scryptxsalsa208sha256_STRHASHBYTES_ENCODED + 1U
== crypto_pwhash_scryptxsalsa208sha256_STRBYTES ? 1 : -1]);
return 0;
}

18
src/libsodium/include/sodium/crypto_pwhash_scryptxsalsa208sha256.h
View File

@ -7,6 +7,13 @@
#include "export.h"
#define crypto_pwhash_scryptxsalsa208sha256_SALTBYTES 32
#define crypto_pwhash_scryptxsalsa208sha256_STRBYTES 102
#define crypto_pwhash_scryptxsalsa208sha256_STRPREFIXBYTES 14
#define crypto_pwhash_scryptxsalsa208sha256_STRSETTINGBYTES 57
#define crypto_pwhash_scryptxsalsa208sha256_STRSALTBYTES 32
#define crypto_pwhash_scryptxsalsa208sha256_STRSALTBYTES_ENCODED 43
#define crypto_pwhash_scryptxsalsa208sha256_STRHASHBYTES 32
#define crypto_pwhash_scryptxsalsa208sha256_STRHASHBYTES_ENCODED 43
#ifdef __cplusplus
# if __GNUC__
@ -18,6 +25,9 @@ extern "C" {
SODIUM_EXPORT
size_t crypto_pwhash_scryptxsalsa208sha256_saltbytes(void);
SODIUM_EXPORT
size_t crypto_pwhash_scryptxsalsa208sha256_strbytes(void);
SODIUM_EXPORT
int crypto_pwhash_scryptxsalsa208sha256(unsigned char * const out,
unsigned long long outlen,
@ -27,6 +37,14 @@ int crypto_pwhash_scryptxsalsa208sha256(unsigned char * const out,
size_t memlimit,
unsigned long long opslimit);
SODIUM_EXPORT
int
crypto_pwhash_scryptxsalsa208sha256_str(char * const out,
const char * const passwd,
unsigned long long passwdlen,
size_t memlimit,
unsigned long long opslimit);
#ifdef __cplusplus
}
#endif