crypt: code shrink

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

diff --git a/libbb/pw_encrypt_des.c b/libbb/pw_encrypt_des.c
index ab217d8e926891083af6f2ccd957f710d4eec6e5..66e6079558ccfa60b14751b95d58476655a75c29 100644 (file)
--- a/libbb/pw_encrypt_des.c
+++ b/libbb/pw_encrypt_des.c
@@ -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];

diff --git a/libbb/pw_encrypt_md5.c b/libbb/pw_encrypt_md5.c
index 6c94d2d292ded2a60e5084856f73fc8f132a1aa5..8d0a516cf945a8454b0482ae131f0dac1bc3d5d4 100644 (file)
--- a/libbb/pw_encrypt_md5.c
+++ b/libbb/pw_encrypt_md5.c
@@ -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. */