summaryrefslogtreecommitdiffhomepage
path: root/libtomcrypt/src/prngs/fortuna.c
diff options
context:
space:
mode:
Diffstat (limited to 'libtomcrypt/src/prngs/fortuna.c')
-rw-r--r--libtomcrypt/src/prngs/fortuna.c54
1 files changed, 27 insertions, 27 deletions
diff --git a/libtomcrypt/src/prngs/fortuna.c b/libtomcrypt/src/prngs/fortuna.c
index 159db52..d262a0b 100644
--- a/libtomcrypt/src/prngs/fortuna.c
+++ b/libtomcrypt/src/prngs/fortuna.c
@@ -6,7 +6,7 @@
* The library is free for all purposes without any express
* guarantee it works.
*
- * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
+ * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
*/
#include "tomcrypt.h"
@@ -19,22 +19,22 @@
We deviate slightly here for reasons of simplicity [and to fit in the API]. First all "sources"
in the AddEntropy function are fixed to 0. Second since no reliable timer is provided
-we reseed automatically when len(pool0) >= 64 or every FORTUNA_WD calls to the read function */
+we reseed automatically when len(pool0) >= 64 or every LTC_FORTUNA_WD calls to the read function */
-#ifdef FORTUNA
+#ifdef LTC_FORTUNA
-/* requries SHA256 and AES */
-#if !(defined(RIJNDAEL) && defined(SHA256))
- #error FORTUNA requires SHA256 and RIJNDAEL (AES)
+/* requries LTC_SHA256 and AES */
+#if !(defined(LTC_RIJNDAEL) && defined(LTC_SHA256))
+ #error LTC_FORTUNA requires LTC_SHA256 and LTC_RIJNDAEL (AES)
#endif
-#ifndef FORTUNA_POOLS
- #warning FORTUNA_POOLS was not previously defined (old headers?)
- #define FORTUNA_POOLS 32
+#ifndef LTC_FORTUNA_POOLS
+ #warning LTC_FORTUNA_POOLS was not previously defined (old headers?)
+ #define LTC_FORTUNA_POOLS 32
#endif
-#if FORTUNA_POOLS < 4 || FORTUNA_POOLS > 32
- #error FORTUNA_POOLS must be in [4..32]
+#if LTC_FORTUNA_POOLS < 4 || LTC_FORTUNA_POOLS > 32
+ #error LTC_FORTUNA_POOLS must be in [4..32]
#endif
const struct ltc_prng_descriptor fortuna_desc = {
@@ -71,14 +71,14 @@ static int fortuna_reseed(prng_state *prng)
++prng->fortuna.reset_cnt;
- /* new K == SHA256(K || s) where s == SHA256(P0) || SHA256(P1) ... */
+ /* new K == LTC_SHA256(K || s) where s == LTC_SHA256(P0) || LTC_SHA256(P1) ... */
sha256_init(&md);
if ((err = sha256_process(&md, prng->fortuna.K, 32)) != CRYPT_OK) {
sha256_done(&md, tmp);
return err;
}
- for (x = 0; x < FORTUNA_POOLS; x++) {
+ for (x = 0; x < LTC_FORTUNA_POOLS; x++) {
if (x == 0 || ((prng->fortuna.reset_cnt >> (x-1)) & 1) == 0) {
/* terminate this hash */
if ((err = sha256_done(&prng->fortuna.pool[x], tmp)) != CRYPT_OK) {
@@ -135,7 +135,7 @@ int fortuna_start(prng_state *prng)
LTC_ARGCHK(prng != NULL);
/* initialize the pools */
- for (x = 0; x < FORTUNA_POOLS; x++) {
+ for (x = 0; x < LTC_FORTUNA_POOLS; x++) {
if ((err = sha256_init(&prng->fortuna.pool[x])) != CRYPT_OK) {
for (y = 0; y < x; y++) {
sha256_done(&prng->fortuna.pool[y], tmp);
@@ -149,7 +149,7 @@ int fortuna_start(prng_state *prng)
/* reset bufs */
zeromem(prng->fortuna.K, 32);
if ((err = rijndael_setup(prng->fortuna.K, 32, 0, &prng->fortuna.skey)) != CRYPT_OK) {
- for (x = 0; x < FORTUNA_POOLS; x++) {
+ for (x = 0; x < LTC_FORTUNA_POOLS; x++) {
sha256_done(&prng->fortuna.pool[x], tmp);
}
return err;
@@ -198,7 +198,7 @@ int fortuna_add_entropy(const unsigned char *in, unsigned long inlen, prng_state
if (prng->fortuna.pool_idx == 0) {
prng->fortuna.pool0_len += inlen;
}
- if (++(prng->fortuna.pool_idx) == FORTUNA_POOLS) {
+ if (++(prng->fortuna.pool_idx) == LTC_FORTUNA_POOLS) {
prng->fortuna.pool_idx = 0;
}
@@ -235,7 +235,7 @@ unsigned long fortuna_read(unsigned char *out, unsigned long outlen, prng_state
LTC_MUTEX_LOCK(&prng->fortuna.prng_lock);
/* do we have to reseed? */
- if (++prng->fortuna.wd == FORTUNA_WD || prng->fortuna.pool0_len >= 64) {
+ if (++prng->fortuna.wd == LTC_FORTUNA_WD || prng->fortuna.pool0_len >= 64) {
if ((err = fortuna_reseed(prng)) != CRYPT_OK) {
LTC_MUTEX_UNLOCK(&prng->fortuna.prng_lock);
return 0;
@@ -290,7 +290,7 @@ int fortuna_done(prng_state *prng)
LTC_MUTEX_LOCK(&prng->fortuna.prng_lock);
/* terminate all the hashes */
- for (x = 0; x < FORTUNA_POOLS; x++) {
+ for (x = 0; x < LTC_FORTUNA_POOLS; x++) {
if ((err = sha256_done(&(prng->fortuna.pool[x]), tmp)) != CRYPT_OK) {
LTC_MUTEX_UNLOCK(&prng->fortuna.prng_lock);
return err;
@@ -325,9 +325,9 @@ int fortuna_export(unsigned char *out, unsigned long *outlen, prng_state *prng)
LTC_MUTEX_LOCK(&prng->fortuna.prng_lock);
/* we'll write bytes for s&g's */
- if (*outlen < 32*FORTUNA_POOLS) {
+ if (*outlen < 32*LTC_FORTUNA_POOLS) {
LTC_MUTEX_UNLOCK(&prng->fortuna.prng_lock);
- *outlen = 32*FORTUNA_POOLS;
+ *outlen = 32*LTC_FORTUNA_POOLS;
return CRYPT_BUFFER_OVERFLOW;
}
@@ -340,7 +340,7 @@ int fortuna_export(unsigned char *out, unsigned long *outlen, prng_state *prng)
/* to emit the state we copy each pool, terminate it then hash it again so
* an attacker who sees the state can't determine the current state of the PRNG
*/
- for (x = 0; x < FORTUNA_POOLS; x++) {
+ for (x = 0; x < LTC_FORTUNA_POOLS; x++) {
/* copy the PRNG */
XMEMCPY(md, &(prng->fortuna.pool[x]), sizeof(*md));
@@ -360,7 +360,7 @@ int fortuna_export(unsigned char *out, unsigned long *outlen, prng_state *prng)
goto LBL_ERR;
}
}
- *outlen = 32*FORTUNA_POOLS;
+ *outlen = 32*LTC_FORTUNA_POOLS;
err = CRYPT_OK;
LBL_ERR:
@@ -386,14 +386,14 @@ int fortuna_import(const unsigned char *in, unsigned long inlen, prng_state *prn
LTC_ARGCHK(in != NULL);
LTC_ARGCHK(prng != NULL);
- if (inlen != 32*FORTUNA_POOLS) {
+ if (inlen != 32*LTC_FORTUNA_POOLS) {
return CRYPT_INVALID_ARG;
}
if ((err = fortuna_start(prng)) != CRYPT_OK) {
return err;
}
- for (x = 0; x < FORTUNA_POOLS; x++) {
+ for (x = 0; x < LTC_FORTUNA_POOLS; x++) {
if ((err = fortuna_add_entropy(in+x*32, 32, prng)) != CRYPT_OK) {
return err;
}
@@ -422,6 +422,6 @@ int fortuna_test(void)
#endif
-/* $Source: /cvs/libtom/libtomcrypt/src/prngs/fortuna.c,v $ */
-/* $Revision: 1.12 $ */
-/* $Date: 2006/12/04 21:34:03 $ */
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 19:12:31 +0000