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libbb: eliminate redundant variable in sha_crypt

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function                                             old     new   delta
sha_crypt                                           1136    1130      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-01-15 20:59:32 +01:00
parent b8935d00b0
commit 16e7f697f8
1 changed files with 7 additions and 8 deletions
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15
libbb/pw_encrypt_sha.c
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@ -47,16 +47,17 @@ sha_crypt(/*const*/ char *key_data, /*const*/ char *salt_data)
unsigned cnt;
unsigned rounds;
char *cp;
char is_sha512;
/* Analyze salt, construct already known part of result */
cnt = strlen(salt_data) + 1 + 43 + 1;
is_sha512 = salt_data[1];
if (is_sha512 == '6')
_32or64 = 32;
if (salt_data[1] == '6') { /* sha512 */
_32or64 *= 2; /*64*/
cnt += 43;
}
result = resptr = xzalloc(cnt); /* will provide NUL terminator */
*resptr++ = '$';
*resptr++ = is_sha512;
*resptr++ = salt_data[1];
*resptr++ = '$';
rounds = ROUNDS_DEFAULT;
salt_data += 3;
@ -93,12 +94,10 @@ sha_crypt(/*const*/ char *key_data, /*const*/ char *salt_data)
sha_begin = (void*)sha256_begin;
sha_hash = (void*)sha256_hash;
sha_end = (void*)sha256_end;
_32or64 = 32;
if (is_sha512 == '6') {
if (_32or64 != 32) {
sha_begin = (void*)sha512_begin;
sha_hash = (void*)sha512_hash;
sha_end = (void*)sha512_end;
_32or64 = 64;
}
/* Add KEY, SALT. */
@ -200,7 +199,7 @@ do { \
unsigned w = ((B2) << 16) | ((B1) << 8) | (B0); \
resptr = to64(resptr, w, N); \
} while (0)
if (is_sha512 == '5') {
if (_32or64 == 32) { /* sha256 */
unsigned i = 0;
while (1) {
unsigned j = i + 10;