diff options
Diffstat (limited to 'libbb/pw_encrypt_md5.c')
| -rw-r--r-- | libbb/pw_encrypt_md5.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/libbb/pw_encrypt_md5.c b/libbb/pw_encrypt_md5.c index 42eb134..6c94d2d 100644 --- a/libbb/pw_encrypt_md5.c +++ b/libbb/pw_encrypt_md5.c @@ -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. */ |