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trivial crypt shrinkage

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function                                             old     new   delta
__md5_to64                                            27      29      +2
pw_encrypt                                          3631    3608     -23
This commit is contained in:
Denis Vlasenko 2008-06-13 15:13:41 +00:00
parent aa9cd89c67
commit 76f812803b
2 changed files with 8 additions and 9 deletions
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2
libbb/pw_encrypt_des.c
View File

@ -673,8 +673,6 @@ des_crypt(struct des_ctx *ctx, char output[21], const unsigned char *key, const
return output;
}
// des_setkey never fails
#undef C
#undef init_perm
#undef final_perm

15
libbb/pw_encrypt_md5.c
View File

@ -501,13 +501,14 @@ static void __md5_Transform(uint32_t state[4], const unsigned char block[64])
}
static void
__md5_to64(char *s, unsigned long v, int n)
static char*
__md5_to64(char *s, unsigned v, int n)
{
while (--n >= 0) {
*s++ = ascii64[v & 0x3f];
v >>= 6;
}
return s;
}
/*
@ -515,7 +516,7 @@ __md5_to64(char *s, unsigned long v, int n)
*
* Use MD5 for what it is best at...
*/
#define MD5_OUT_BUFSIZE 120
#define MD5_OUT_BUFSIZE 36
static char *
md5_crypt(char passwd[120], const unsigned char *pw, const unsigned char *salt)
@ -578,7 +579,6 @@ md5_crypt(char passwd[120], const unsigned char *pw, const unsigned char *salt)
passwd[2] = '$';
strncpy(passwd + 3, (char*)sp, sl);
passwd[sl + 3] = '$';
passwd[sl + 4] = '\0';
__md5_Final(final, &ctx);
@ -607,15 +607,16 @@ md5_crypt(char passwd[120], const unsigned char *pw, const unsigned char *salt)
__md5_Final(final, &ctx1);
}
p = passwd + sl + 4; /*strlen(passwd);*/
p = passwd + sl + 4; /* 12 bytes max (sl is up to 8 bytes) */
/* Add 5*4+2 = 22 bytes of hash, + NUL byte. */
final[16] = final[5];
for (i = 0; i < 5; i++) {
l = (final[i] << 16) | (final[i+6] << 8) | final[i+12];
__md5_to64(p, l, 4); p += 4;
p = __md5_to64(p, l, 4);
}
l = final[11];
__md5_to64(p, l, 2); p += 2;
p = __md5_to64(p, l, 2);
*p = '\0';
/* Don't leave anything around in vm they could use. */