Fix FTBFS causes by invalid casts. This resolves issue #13

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit cf9fd197a3)

kftpgrabber/src/misc/libs/ssh/dh.c

@@ -128,7 +128,7 @@ void dh_generate_e(SSH_SESSION *session){
 }
 
 
-STRING *make_bignum_string(bignum num){
+STRING *make_bignum_string(const bignum num){
     STRING *ptr;
     int pad=0;
     int len=bignum_num_bytes(num);
@@ -142,14 +142,14 @@ STRING *make_bignum_string(bignum num){
     ptr->size=htonl(len+pad);
     if(pad)
         ptr->string[0]=0;
-    finallen=bignum_bn2bin(num,ptr->string+pad);
+    finallen=bignum_bn2bin(num,(unsigned char*)(ptr->string+pad));
     return ptr;
 }
 
 bignum make_string_bn(STRING *string){
 	int len=ntohl(string->size);
 	ssh_say(3,"Importing a %d bits,%d bytes object ...\n",len*8,len);
-	return bignum_bin2bn(string->string,len,NULL);
+	return bignum_bin2bn((unsigned char*)(string->string),len,NULL);
 }
 
 STRING *dh_get_e(SSH_SESSION *session){

kftpgrabber/src/misc/libs/ssh/keys.c

@@ -173,8 +173,8 @@ STRING *signature_to_string(SIGNATURE *sign){
     free(tmp);
     switch(sign->type){
         case TYPE_DSS: {
-            BIGNUM *bn_r = 0L;
+            const BIGNUM *bn_r = 0L;
-            BIGNUM *bn_s = 0L;
+            const BIGNUM *bn_s = 0L;
 #if OPENSSL_VERSION_NUMBER < 0x10100000L
             bn_r = sign->dsa_sign->r;
             bn_s = sign->dsa_sign->s;

kftpgrabber/src/misc/libs/ssh/priv.h

@@ -288,7 +288,7 @@ void generate_session_keys(SSH_SESSION *session);
 /* returns 1 if server signature ok, 0 otherwise. The NEXT crypto is checked, not the current one */
 int signature_verify(SSH_SESSION *session,STRING *signature);
 bignum make_string_bn(STRING *string);
-STRING *make_bignum_string(bignum num);
+STRING *make_bignum_string(const bignum num);
 
 /* in crypt.c */
 u32 packet_decrypt_len(SSH_SESSION *session,char *crypted);