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authorDenys Vlasenko <vda.linux@googlemail.com>2017-01-15 20:59:32 +0100
committerDenys Vlasenko <vda.linux@googlemail.com>2017-01-15 20:59:32 +0100
commit16e7f697f8064a4e5fc2f8e181fe6a7b9602b1b3 (patch)
treee9bf4f43c76904ffa299915541eec40e9a5ce8e4
parentb8935d00b0a60be24ee9073349c2a185cebbacd4 (diff)
downloadbusybox-16e7f697f8064a4e5fc2f8e181fe6a7b9602b1b3.tar.gz
libbb: eliminate redundant variable in sha_crypt
function old new delta sha_crypt 1136 1130 -6 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--libbb/pw_encrypt_sha.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/libbb/pw_encrypt_sha.c b/libbb/pw_encrypt_sha.c
index 8aeaacad6..72e37e485 100644
--- a/libbb/pw_encrypt_sha.c
+++ b/libbb/pw_encrypt_sha.c
@@ -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;