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| author | Denys Vlasenko | 2011-05-13 03:19:01 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2011-05-13 03:19:01 +0200 |
| commit | 12a432715f066cf9d677316a39c9e0ebc6d72404 (patch) | |
| tree | 14a33cdedbd6ba7739449cc3dec968b55a01efad /libbb | |
| parent | 0806e401d6747c391fa0427e0ccba9951f9a1c3d (diff) | |
| download | busybox-12a432715f066cf9d677316a39c9e0ebc6d72404.zip busybox-12a432715f066cf9d677316a39c9e0ebc6d72404.tar.gz | |
adduser: safe username passing to passwd/addgroup
passwd: support creating SHA passwords
random code shrink
function old new delta
crypt_make_pw_salt - 87 +87
adduser_main 883 904 +21
...
crypt_make_salt 99 89 -10
chpasswd_main 329 312 -17
packed_usage 28731 28691 -40
passwd_main 1070 1000 -70
cryptpw_main 310 224 -86
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/12 up/down: 154/-288) Total: -134 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/pw_encrypt.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/libbb/pw_encrypt.c b/libbb/pw_encrypt.c index c6c04d4..39ffa08 100644 --- a/libbb/pw_encrypt.c +++ b/libbb/pw_encrypt.c @@ -27,9 +27,10 @@ static int i64c(int i) return ('a' - 38 + i); } -int FAST_FUNC crypt_make_salt(char *p, int cnt, int x) +int FAST_FUNC crypt_make_salt(char *p, int cnt /*, int x */) { - x += getpid() + time(NULL); + /* was: x += ... */ + int x = getpid() + monotonic_us(); do { /* x = (x*1664525 + 1013904223) % 2^32 generator is lame * (low-order bit is not "random", etc...), @@ -47,6 +48,26 @@ int FAST_FUNC crypt_make_salt(char *p, int cnt, int x) return x; } +char* FAST_FUNC crypt_make_pw_salt(char salt[MAX_PW_SALT_LEN], const char *algo) +{ + int len = 2/2; + char *salt_ptr = salt; + if (algo[0] != 'd') { /* not des */ + len = 8/2; /* so far assuming md5 */ + *salt_ptr++ = '$'; + *salt_ptr++ = '1'; + *salt_ptr++ = '$'; +#if !ENABLE_USE_BB_CRYPT || ENABLE_USE_BB_CRYPT_SHA + if (algo[0] == 's') { /* sha */ + salt[1] = '5' + (strcmp(algo, "sha512") == 0); + len = 16/2; + } +#endif + } + crypt_make_salt(salt_ptr, len); + return salt_ptr; +} + #if ENABLE_USE_BB_CRYPT static char* |