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crypt: code shrink

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function                                             old     new   delta
des_crypt                                              -    1682   +1682
md5_crypt                                              -     627    +627
pw_encrypt                                          3608    1036   -2572
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/1 up/down: 2309/-2572)       Total: -263 bytes
This commit is contained in:
Denis Vlasenko 2008-06-14 22:11:29 +00:00
parent 7a762f9dbf
commit e235285c3a
2 changed files with 11 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
libbb/pw_encrypt_des.c
View File

@ -400,7 +400,6 @@ des_init(struct des_ctx *ctx, const struct const_des_ctx *cctx)
static void
setup_salt(struct des_ctx *ctx, uint32_t salt)
{
// const struct const_des_ctx *cctx = const_ctx;
uint32_t obit, saltbit;
int i;
@ -422,7 +421,6 @@ setup_salt(struct des_ctx *ctx, uint32_t salt)
static void
des_setkey(struct des_ctx *ctx, const char *key)
{
// const struct const_des_ctx *cctx = const_ctx;
uint32_t k0, k1, rawkey0, rawkey1;
int shifts, round;
@ -498,7 +496,7 @@ des_setkey(struct des_ctx *ctx, const char *key)
}
static int
static void
do_des(struct des_ctx *ctx, uint32_t l_in, uint32_t r_in, uint32_t *l_out, uint32_t *r_out, int count)
{
const struct const_des_ctx *cctx = const_ctx;
@ -602,12 +600,12 @@ do_des(struct des_ctx *ctx, uint32_t l_in, uint32_t r_in, uint32_t *l_out, uint3
| fp_maskr[5][(r >> 16) & 0xff]
| fp_maskr[6][(r >> 8) & 0xff]
| fp_maskr[7][r & 0xff];
return 0;
}
#define DES_OUT_BUFSIZE 21
static char *
NOINLINE
des_crypt(struct des_ctx *ctx, char output[21], const unsigned char *key, const unsigned char *setting)
{
uint32_t salt, l, r0, r1, keybuf[2];
@ -618,10 +616,11 @@ des_crypt(struct des_ctx *ctx, char output[21], const unsigned char *key, const
* and padding with zeros.
*/
q = (uint8_t *)keybuf;
while (q - (uint8_t *)keybuf - 8) {
*q++ = *key << 1;
if (*(q - 1))
while (q - (uint8_t *)keybuf != 8) {
*q = *key << 1;
if (*q)
key++;
q++;
}
des_setkey(ctx, (char *)keybuf);
@ -658,7 +657,7 @@ des_crypt(struct des_ctx *ctx, char output[21], const unsigned char *key, const
*p++ = ascii64[(l >> 6) & 0x3f];
*p++ = ascii64[l & 0x3f];
l = (r0 << 16) | ((r1 >> 16) & 0xffff);
l = ((r0 << 16) | (r1 >> 16));
*p++ = ascii64[(l >> 18) & 0x3f];
*p++ = ascii64[(l >> 12) & 0x3f];
*p++ = ascii64[(l >> 6) & 0x3f];

17
libbb/pw_encrypt_md5.c
View File

@ -101,7 +101,6 @@ static const unsigned char __md5__magic[] = MD5_MAGIC_STR;
* __md5_Encodes input (uint32_t) into output (unsigned char). Assumes len is
* a multiple of 4.
*/
static void
__md5_Encode(unsigned char *output, uint32_t *input, unsigned int len)
{
@ -119,7 +118,6 @@ __md5_Encode(unsigned char *output, uint32_t *input, unsigned int len)
* __md5_Decodes input (unsigned char) into output (uint32_t). Assumes len is
* a multiple of 4.
*/
static void
__md5_Decode(uint32_t *output, const unsigned char *input, unsigned int len)
{
@ -166,7 +164,6 @@ __md5_Decode(uint32_t *output, const unsigned char *input, unsigned int len)
}
/* MD5 initialization. Begins an MD5 operation, writing a new context. */
static void __md5_Init(struct MD5Context *context)
{
context->count[0] = context->count[1] = 0;
@ -183,7 +180,6 @@ static void __md5_Init(struct MD5Context *context)
* operation, processing another message block, and updating the
* context.
*/
static void __md5_Update(struct MD5Context *context, const unsigned char *input, unsigned int inputLen)
{
unsigned int i, idx, partLen;
@ -218,7 +214,6 @@ static void __md5_Update(struct MD5Context *context, const unsigned char *input,
/*
* MD5 padding. Adds padding followed by original length.
*/
static void __md5_Pad(struct MD5Context *context)
{
unsigned char bits[8];
@ -244,7 +239,6 @@ static void __md5_Pad(struct MD5Context *context)
* MD5 finalization. Ends an MD5 message-digest operation, writing the
* the message digest and zeroizing the context.
*/
static void __md5_Final(unsigned char digest[16], struct MD5Context *context)
{
/* Do padding. */
@ -258,7 +252,6 @@ static void __md5_Final(unsigned char digest[16], struct MD5Context *context)
}
/* MD5 basic transformation. Transforms state based on block. */
static void __md5_Transform(uint32_t state[4], const unsigned char block[64])
{
uint32_t a, b, c, d, x[16];
@ -517,16 +510,15 @@ __md5_to64(char *s, unsigned v, int n)
* Use MD5 for what it is best at...
*/
#define MD5_OUT_BUFSIZE 36
static char *
md5_crypt(char passwd[120], const unsigned char *pw, const unsigned char *salt)
NOINLINE
md5_crypt(char passwd[MD5_OUT_BUFSIZE], const unsigned char *pw, const unsigned char *salt)
{
const unsigned char *sp, *ep;
char *p;
unsigned char final[17]; /* final[16] exists only to aid in looping */
int sl, pl, i, pw_len;
struct MD5Context ctx, ctx1;
unsigned long l;
/* Refine the Salt first */
sp = salt;
@ -612,11 +604,10 @@ md5_crypt(char passwd[120], const unsigned char *pw, const unsigned char *salt)
/* 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];
unsigned l = (final[i] << 16) | (final[i+6] << 8) | final[i+12];
p = __md5_to64(p, l, 4);
}
l = final[11];
p = __md5_to64(p, l, 2);
p = __md5_to64(p, final[11], 2);
*p = '\0';
/* Don't leave anything around in vm they could use. */