propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)

            to branch 'au.asn.ucc.matt.dropbear' (head 02c413252c90e9de8e03d91e9939dde3029f5c0a)

--HG--
extra : convert_revision : 52ccb0ad0587a62bc64aecb939adbb76546aac16

1 files changed, 38 insertions, 51 deletions

diff --git a/libtomcrypt/src/pk/rsa/rsa_make_key.c b/libtomcrypt/src/pk/rsa/rsa_make_key.c
index d874106..bd2a29b 100644
--- a/libtomcrypt/src/pk/rsa/rsa_make_key.c
+++ b/libtomcrypt/src/pk/rsa/rsa_make_key.c
@@ -6,7 +6,7 @@
  * The library is free for all purposes without any express
  * guarantee it works.
  *
- * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org
+ * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
  */
 #include "tomcrypt.h"
 
@@ -28,10 +28,11 @@
 */
 int rsa_make_key(prng_state *prng, int wprng, int size, long e, rsa_key *key)
 {
-   mp_int p, q, tmp1, tmp2, tmp3;
+   void *p, *q, *tmp1, *tmp2, *tmp3;
    int    err;
 
-   LTC_ARGCHK(key != NULL);
+   LTC_ARGCHK(ltc_mp.name != NULL);
+   LTC_ARGCHK(key         != NULL);
 
    if ((size < (MIN_RSA_SIZE/8)) || (size > (MAX_RSA_SIZE/8))) {
       return CRYPT_INVALID_KEYSIZE;
@@ -45,81 +46,67 @@ int rsa_make_key(prng_state *prng, int wprng, int size, long e, rsa_key *key)
       return err;
    }
 
-   if ((err = mp_init_multi(&p, &q, &tmp1, &tmp2, &tmp3, NULL)) != MP_OKAY) {
-      return mpi_to_ltc_error(err);
+   if ((err = mp_init_multi(&p, &q, &tmp1, &tmp2, &tmp3, NULL)) != CRYPT_OK) {
+      return err;
    }
 
    /* make primes p and q (optimization provided by Wayne Scott) */
-   if ((err = mp_set_int(&tmp3, e)) != MP_OKAY) { goto error; }            /* tmp3 = e */
+   if ((err = mp_set_int(tmp3, e)) != CRYPT_OK)                      { goto errkey; }  /* tmp3 = e */
 
    /* make prime "p" */
    do {
-       if ((err = rand_prime(&p, size*4, prng, wprng)) != CRYPT_OK) { goto done; }
-       if ((err = mp_sub_d(&p, 1, &tmp1)) != MP_OKAY)               { goto error; }  /* tmp1 = p-1 */
-       if ((err = mp_gcd(&tmp1, &tmp3, &tmp2)) != MP_OKAY)          { goto error; }  /* tmp2 = gcd(p-1, e) */
-   } while (mp_cmp_d(&tmp2, 1) != 0);                                                /* while e divides p-1 */
+       if ((err = rand_prime( p, size/2, prng, wprng)) != CRYPT_OK)  { goto errkey; }
+       if ((err = mp_sub_d( p, 1,  tmp1)) != CRYPT_OK)               { goto errkey; }  /* tmp1 = p-1 */
+       if ((err = mp_gcd( tmp1,  tmp3,  tmp2)) != CRYPT_OK)          { goto errkey; }  /* tmp2 = gcd(p-1, e) */
+   } while (mp_cmp_d( tmp2, 1) != 0);                                                  /* while e divides p-1 */
 
    /* make prime "q" */
    do {
-       if ((err = rand_prime(&q, size*4, prng, wprng)) != CRYPT_OK) { goto done; }
-       if ((err = mp_sub_d(&q, 1, &tmp1)) != MP_OKAY)               { goto error; } /* tmp1 = q-1 */
-       if ((err = mp_gcd(&tmp1, &tmp3, &tmp2)) != MP_OKAY)          { goto error; } /* tmp2 = gcd(q-1, e) */
-   } while (mp_cmp_d(&tmp2, 1) != 0);                                               /* while e divides q-1 */
+       if ((err = rand_prime( q, size/2, prng, wprng)) != CRYPT_OK)  { goto errkey; }
+       if ((err = mp_sub_d( q, 1,  tmp1)) != CRYPT_OK)               { goto errkey; } /* tmp1 = q-1 */
+       if ((err = mp_gcd( tmp1,  tmp3,  tmp2)) != CRYPT_OK)          { goto errkey; } /* tmp2 = gcd(q-1, e) */
+   } while (mp_cmp_d( tmp2, 1) != 0);                                                 /* while e divides q-1 */
 
    /* tmp1 = lcm(p-1, q-1) */
-   if ((err = mp_sub_d(&p, 1, &tmp2)) != MP_OKAY)                  { goto error; } /* tmp2 = p-1 */
-                                                                   /* tmp1 = q-1 (previous do/while loop) */
-   if ((err = mp_lcm(&tmp1, &tmp2, &tmp1)) != MP_OKAY)             { goto error; } /* tmp1 = lcm(p-1, q-1) */
+   if ((err = mp_sub_d( p, 1,  tmp2)) != CRYPT_OK)                   { goto errkey; } /* tmp2 = p-1 */
+                                                                                      /* tmp1 = q-1 (previous do/while loop) */
+   if ((err = mp_lcm( tmp1,  tmp2,  tmp1)) != CRYPT_OK)              { goto errkey; } /* tmp1 = lcm(p-1, q-1) */
 
    /* make key */
-   if ((err = mp_init_multi(&key->e, &key->d, &key->N, &key->dQ, &key->dP,
-                     &key->qP, &key->p, &key->q, NULL)) != MP_OKAY) {
-      goto error;
+   if ((err = mp_init_multi(&key->e, &key->d, &key->N, &key->dQ, &key->dP, &key->qP, &key->p, &key->q, NULL)) != CRYPT_OK) {
+      goto errkey;
    }
 
-   if ((err = mp_set_int(&key->e, e)) != MP_OKAY)                     { goto error2; } /* key->e =  e */
-   if ((err = mp_invmod(&key->e, &tmp1, &key->d)) != MP_OKAY)         { goto error2; } /* key->d = 1/e mod lcm(p-1,q-1) */
-   if ((err = mp_mul(&p, &q, &key->N)) != MP_OKAY)                    { goto error2; } /* key->N = pq */
+   if ((err = mp_set_int( key->e, e)) != CRYPT_OK)                     { goto errkey; } /* key->e =  e */
+   if ((err = mp_invmod( key->e,  tmp1,  key->d)) != CRYPT_OK)         { goto errkey; } /* key->d = 1/e mod lcm(p-1,q-1) */
+   if ((err = mp_mul( p,  q,  key->N)) != CRYPT_OK)                    { goto errkey; } /* key->N = pq */
 
    /* optimize for CRT now */
    /* find d mod q-1 and d mod p-1 */
-   if ((err = mp_sub_d(&p, 1, &tmp1)) != MP_OKAY)                     { goto error2; } /* tmp1 = q-1 */
-   if ((err = mp_sub_d(&q, 1, &tmp2)) != MP_OKAY)                     { goto error2; } /* tmp2 = p-1 */
-   if ((err = mp_mod(&key->d, &tmp1, &key->dP)) != MP_OKAY)           { goto error2; } /* dP = d mod p-1 */
-   if ((err = mp_mod(&key->d, &tmp2, &key->dQ)) != MP_OKAY)           { goto error2; } /* dQ = d mod q-1 */
-   if ((err = mp_invmod(&q, &p, &key->qP)) != MP_OKAY)                { goto error2; } /* qP = 1/q mod p */
-
-   if ((err = mp_copy(&p, &key->p)) != MP_OKAY)                       { goto error2; }
-   if ((err = mp_copy(&q, &key->q)) != MP_OKAY)                       { goto error2; }
-
-   /* shrink ram required  */
-   if ((err = mp_shrink(&key->e)) != MP_OKAY)                         { goto error2; }
-   if ((err = mp_shrink(&key->d)) != MP_OKAY)                         { goto error2; }
-   if ((err = mp_shrink(&key->N)) != MP_OKAY)                         { goto error2; }
-   if ((err = mp_shrink(&key->dQ)) != MP_OKAY)                        { goto error2; }
-   if ((err = mp_shrink(&key->dP)) != MP_OKAY)                        { goto error2; }
-   if ((err = mp_shrink(&key->qP)) != MP_OKAY)                        { goto error2; }
-   if ((err = mp_shrink(&key->p)) != MP_OKAY)                         { goto error2; }
-   if ((err = mp_shrink(&key->q)) != MP_OKAY)                         { goto error2; }
+   if ((err = mp_sub_d( p, 1,  tmp1)) != CRYPT_OK)                     { goto errkey; } /* tmp1 = q-1 */
+   if ((err = mp_sub_d( q, 1,  tmp2)) != CRYPT_OK)                     { goto errkey; } /* tmp2 = p-1 */
+   if ((err = mp_mod( key->d,  tmp1,  key->dP)) != CRYPT_OK)           { goto errkey; } /* dP = d mod p-1 */
+   if ((err = mp_mod( key->d,  tmp2,  key->dQ)) != CRYPT_OK)           { goto errkey; } /* dQ = d mod q-1 */
+   if ((err = mp_invmod( q,  p,  key->qP)) != CRYPT_OK)                { goto errkey; } /* qP = 1/q mod p */
+
+   if ((err = mp_copy( p,  key->p)) != CRYPT_OK)                       { goto errkey; }
+   if ((err = mp_copy( q,  key->q)) != CRYPT_OK)                       { goto errkey; }
 
    /* set key type (in this case it's CRT optimized) */
    key->type = PK_PRIVATE;
 
    /* return ok and free temps */
    err       = CRYPT_OK;
-   goto done;
-error2:
-   mp_clear_multi(&key->d, &key->e, &key->N, &key->dQ, &key->dP,
-                  &key->qP, &key->p, &key->q, NULL);
-error:
-   err = mpi_to_ltc_error(err);
-done:
-   mp_clear_multi(&tmp3, &tmp2, &tmp1, &p, &q, NULL);
+   goto cleanup;
+errkey:
+   mp_clear_multi(key->d, key->e, key->N, key->dQ, key->dP, key->qP, key->p, key->q, NULL);
+cleanup:
+   mp_clear_multi(tmp3, tmp2, tmp1, p, q, NULL);
    return err;
 }
 
 #endif
 
 /* $Source: /cvs/libtom/libtomcrypt/src/pk/rsa/rsa_make_key.c,v $ */
-/* $Revision: 1.3 $ */
-/* $Date: 2005/05/05 14:35:59 $ */
+/* $Revision: 1.14 $ */
+/* $Date: 2006/12/04 22:23:27 $ */