make changes that ben laurie suggested

(ben, was this what you had in mind?)


svn:r1415

src/common/crypto.c

@@ -674,16 +674,17 @@ int crypto_pk_asn1_encode(crypto_pk_env_t *pk, char *dest, int dest_len)
 crypto_pk_env_t *crypto_pk_asn1_decode(const char *str, int len)
 {
   RSA *rsa;
-  unsigned char *buf, *bufp;
-  bufp = buf = (unsigned char *)tor_malloc(len);
+  unsigned char *buf;
+  const unsigned char *bufp;
+  bufp = buf = tor_malloc(len);
   memcpy(buf,str,len);
   /* This ifdef suppresses a type warning.  Take out the first case once
    * everybody is using openssl 0.9.7 or later.
    */
 #if OPENSSL_VERSION_NUMBER < 0x00907000l
-  rsa = d2i_RSAPublicKey(NULL, &bufp, len);
+  rsa = d2i_RSAPublicKey(NULL, &buf, len);
 #else
-  rsa = d2i_RSAPublicKey(NULL, (const unsigned char **)&bufp, len);
+  rsa = d2i_RSAPublicKey(NULL, &bufp, len);
 #endif
   tor_free(buf);
   if (!rsa)