Added a modified libtomcrypt with DSA and RSA algorithms.

1 files changed, 14 insertions, 14 deletions

diff --git a/libtomcrypt/pk/rsa/rsa_exptmod.c b/libtomcrypt/pk/rsa/rsa_exptmod.c
index 7237790..3c55e30 100644
--- a/libtomcrypt/pk/rsa/rsa_exptmod.c
+++ b/libtomcrypt/pk/rsa/rsa_exptmod.c
@@ -31,7 +31,7 @@ int rsa_exptmod(const unsigned char *in,   unsigned long inlen,
                       unsigned char *out,  unsigned long *outlen, int which,
                       rsa_key *key)
 {
-   void         *tmp, *tmpa, *tmpb;
+   mp_int        tmp, tmpa, tmpb;
    unsigned long x;
    int           err;
 
@@ -52,10 +52,10 @@ int rsa_exptmod(const unsigned char *in,   unsigned long inlen,
 
    /* init and copy into tmp */
    if ((err = mp_init_multi(&tmp, &tmpa, &tmpb, NULL)) != CRYPT_OK)                                    { return err; }
-   if ((err = mp_read_unsigned_bin(tmp, (unsigned char *)in, (int)inlen)) != CRYPT_OK)                 { goto error; }
+   if ((err = mp_read_unsigned_bin(&tmp, (unsigned char *)in, (int)inlen)) != CRYPT_OK)                 { goto error; }
 
    /* sanity check on the input */
-   if (mp_cmp(key->N, tmp) == LTC_MP_LT) {
+   if (mp_cmp(&key->N, &tmp) == LTC_MP_LT) {
       err = CRYPT_PK_INVALID_SIZE;
       goto error;
    }
@@ -63,25 +63,25 @@ int rsa_exptmod(const unsigned char *in,   unsigned long inlen,
    /* are we using the private exponent and is the key optimized? */
    if (which == PK_PRIVATE) {
       /* tmpa = tmp^dP mod p */
-      if ((err = mp_exptmod(tmp, key->dP, key->p, tmpa)) != CRYPT_OK)                               { goto error; }
+      if ((err = mp_exptmod(&tmp, &key->dP, &key->p, &tmpa)) != CRYPT_OK)                               { goto error; }
 
       /* tmpb = tmp^dQ mod q */
-      if ((err = mp_exptmod(tmp, key->dQ, key->q, tmpb)) != CRYPT_OK)                               { goto error; }
+      if ((err = mp_exptmod(&tmp, &key->dQ, &key->q, &tmpb)) != CRYPT_OK)                               { goto error; }
 
       /* tmp = (tmpa - tmpb) * qInv (mod p) */
-      if ((err = mp_sub(tmpa, tmpb, tmp)) != CRYPT_OK)                                              { goto error; }
-      if ((err = mp_mulmod(tmp, key->qP, key->p, tmp)) != CRYPT_OK)                                { goto error; }
+      if ((err = mp_sub(&tmpa, &tmpb, &tmp)) != CRYPT_OK)                                              { goto error; }
+      if ((err = mp_mulmod(&tmp, &key->qP, &key->p, &tmp)) != CRYPT_OK)                                { goto error; }
 
       /* tmp = tmpb + q * tmp */
-      if ((err = mp_mul(tmp, key->q, tmp)) != CRYPT_OK)                                             { goto error; }
-      if ((err = mp_add(tmp, tmpb, tmp)) != CRYPT_OK)                                               { goto error; }
+      if ((err = mp_mul(&tmp, &key->q, &tmp)) != CRYPT_OK)                                             { goto error; }
+      if ((err = mp_add(&tmp, &tmpb, &tmp)) != CRYPT_OK)                                               { goto error; }
    } else {
       /* exptmod it */
-      if ((err = mp_exptmod(tmp, key->e, key->N, tmp)) != CRYPT_OK)                                { goto error; }
+      if ((err = mp_exptmod(&tmp, &key->e, &key->N, &tmp)) != CRYPT_OK)                                { goto error; }
    }
 
    /* read it back */
-   x = (unsigned long)mp_unsigned_bin_size(key->N);
+   x = (unsigned long)mp_unsigned_bin_size(&key->N);
    if (x > *outlen) {
       *outlen = x;
       err = CRYPT_BUFFER_OVERFLOW;
@@ -89,7 +89,7 @@ int rsa_exptmod(const unsigned char *in,   unsigned long inlen,
    }
 
    /* this should never happen ... */
-   if (mp_unsigned_bin_size(tmp) > mp_unsigned_bin_size(key->N)) {
+   if (mp_unsigned_bin_size(&tmp) > mp_unsigned_bin_size(&key->N)) {
       err = CRYPT_ERROR;
       goto error;
    }
@@ -97,12 +97,12 @@ int rsa_exptmod(const unsigned char *in,   unsigned long inlen,
 
    /* convert it */
    zeromem(out, x);
-   if ((err = mp_to_unsigned_bin(tmp, out+(x-mp_unsigned_bin_size(tmp)))) != CRYPT_OK)               { goto error; }
+   if ((err = mp_to_unsigned_bin(&tmp, out+(x-mp_unsigned_bin_size(&tmp)))) != CRYPT_OK)               { goto error; }
 
    /* clean up and return */
    err = CRYPT_OK;
 error:
-   mp_clear_multi(tmp, tmpa, tmpb, NULL);
+   mp_clear_multi(&tmp, &tmpa, &tmpb, NULL);
    return err;
 }