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Simplify code handling iterations count: in boot mode, we'll set the correct iterations count inside derive_u_sha256 and derive_u_ripemd160 depending in the value of the iterations parameter. On normal mode, we use normal values of iterations count. Removes the special test parameter from RIPEMD160 functions.

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This commit is contained in:
Mounir IDRASSI
2014-10-26 00:57:44 +02:00
parent 714a2ce0ae
commit 3f2e20e339
6 changed files with 37 additions and 32 deletions
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47
src/Common/Pkcs5.c
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@@ -122,10 +122,17 @@ void derive_u_sha256 (char *pwd, int pwd_len, char *salt, int salt_len, int iter
uint32 c;
int i;
if (iterations == 2000)
#ifdef TC_WINDOWS_BOOT
/* In bootloader, iterations is a boolean : TRUE for boot derivation mode, FALSE otherwise
* This enables us to save code space needed for implementing other features.
*/
if (iterations)
c = 200000;
else
c = 500000;
#else
c = iterations;
#endif
/* iteration 1 */
memset (counter, 0, 4);
@@ -410,7 +417,7 @@ void hmac_ripemd160 (char *key, int keylen, char *input, int len, char *digest)
burn (&context, sizeof(context));
}
void derive_u_ripemd160 (BOOL bNotTest, char *pwd, int pwd_len, char *salt, int salt_len, int iterations, char *u, int b)
void derive_u_ripemd160 (char *pwd, int pwd_len, char *salt, int salt_len, int iterations, char *u, int b)
{
char j[RIPEMD160_DIGESTSIZE], k[RIPEMD160_DIGESTSIZE];
char init[128];
@@ -418,17 +425,17 @@ void derive_u_ripemd160 (BOOL bNotTest, char *pwd, int pwd_len, char *salt, int
uint32 c;
int i;
if (bNotTest)
{
if (iterations == 32767)
c = 655331;
else
c = 327661;
}
#ifdef TC_WINDOWS_BOOT
/* In bootloader, iterations is a boolean : TRUE for boot derivation mode, FALSE otherwise
* This enables us to save code space needed for implementing other features.
*/
if (iterations)
c = 327661;
else
{
c = iterations;
}
c = 655331;
#else
c = iterations;
#endif
/* iteration 1 */
memset (counter, 0, 4);
@@ -455,7 +462,7 @@ void derive_u_ripemd160 (BOOL bNotTest, char *pwd, int pwd_len, char *salt, int
burn (k, sizeof(k));
}
void derive_key_ripemd160 (BOOL bNotTest, char *pwd, int pwd_len, char *salt, int salt_len, int iterations, char *dk, int dklen)
void derive_key_ripemd160 (char *pwd, int pwd_len, char *salt, int salt_len, int iterations, char *dk, int dklen)
{
char u[RIPEMD160_DIGESTSIZE];
int b, l, r;
@@ -474,13 +481,13 @@ void derive_key_ripemd160 (BOOL bNotTest, char *pwd, int pwd_len, char *salt, in
/* first l - 1 blocks */
for (b = 1; b < l; b++)
{
derive_u_ripemd160 (bNotTest, pwd, pwd_len, salt, salt_len, iterations, u, b);
derive_u_ripemd160 (pwd, pwd_len, salt, salt_len, iterations, u, b);
memcpy (dk, u, RIPEMD160_DIGESTSIZE);
dk += RIPEMD160_DIGESTSIZE;
}
/* last block */
derive_u_ripemd160 (bNotTest, pwd, pwd_len, salt, salt_len, iterations, u, b);
derive_u_ripemd160 (pwd, pwd_len, salt, salt_len, iterations, u, b);
memcpy (dk, u, r);
@@ -656,7 +663,6 @@ char *get_pkcs5_prf_name (int pkcs5_prf_id)
}
}
#endif //!TC_WINDOWS_BOOT
int get_pkcs5_iteration_count (int pkcs5_prf_id, BOOL bBoot)
@@ -665,22 +671,21 @@ int get_pkcs5_iteration_count (int pkcs5_prf_id, BOOL bBoot)
{
case RIPEMD160:
return bBoot? 16384 : 32767; /* it will be changed to 327661 and 655331 respectively inside derive_u_ripemd160 */
#ifndef TC_WINDOWS_BOOT
return bBoot? 327661 : 655331;
case SHA512:
return 500000;
case WHIRLPOOL:
return 500000;
#endif
case SHA256:
return bBoot? 2000 : 5000; /* it will be changed to 200000 and 500000 respectively inside derive_u_sha256 */
return bBoot? 200000 : 500000;
default:
TC_THROW_FATAL_EXCEPTION; // Unknown/wrong ID
}
return 0;
}
#endif //!TC_WINDOWS_BOOT