prepared recipient list support

include/pcp/plist.h

@@ -0,0 +1,55 @@
+/*
+    This file is part of Pretty Curved Privacy (pcp1).
+
+    Copyright (C) 2013 T. von Dein.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+    You can contact me by mail: <tlinden AT cpan DOT org>.
+*/
+
+
+// used for recipient- or keyid lists
+
+#ifndef _HAVE_PCP_PLIST_H
+#define _HAVE_PCP_PLIST_H
+
+#include <stdlib.h>
+
+struct _plist_t {
+  char *value;
+  struct _plist_t *next;
+};
+
+typedef struct _plist_t plist_t;
+
+static inline void p_add(plist_t **lst, char *value) {
+  plist_t *newitem;
+  plist_t *lst_iter = *lst;
+
+  newitem = (plist_t *)malloc(sizeof(plist_t));
+  newitem->value = malloc(strlen(value) + 1);
+  strncpy(newitem->value, value, strlen(value) + 1);
+  newitem->next = NULL;
+  
+  if ( lst_iter != NULL ) {
+    while (lst_iter->next != NULL )
+      lst_iter = lst_iter->next;
+    lst_iter->next = newitem;
+  }
+  else
+    *lst = newitem;
+}
+
+#endif // _HAVE_PCP_PLIST_H

src/encryption.c

@@ -93,39 +93,62 @@ int pcpdecrypt(char *id, int useid, char *infile, char *outfile, char *passwd) {
 
 
 
-int pcpencrypt(char *id, char *infile, char *outfile, char *passwd, char *recipient) {
+int pcpencrypt(char *id, char *infile, char *outfile, char *passwd, plist_t *recipient) {
   FILE *in = NULL;
   FILE *out = NULL;
+  pcp_pubkey_t *pubhash = NULL; // FIXME: add free()
+  pcp_pubkey_t *tmp = NULL;
   pcp_pubkey_t *pub = NULL;
   pcp_key_t *secret = NULL;
   int self = 0;
 
-  // look if we've got that key
-  HASH_FIND_STR(pcppubkey_hash, id, pub);
-  if(pub == NULL) {
-    // FIXME: use recipient to lookup by name or email
-    // self-encryption: look if its a secret one
-    pcp_key_t *s = NULL;
-    HASH_FIND_STR(pcpkey_hash, id, s);
-    if(s != NULL) {
-      pub = pcpkey_pub_from_secret(s);
-      self = 1;
+  // FIXME: mk id a plist_t with loop as well
+  if(id != NULL) {
+    // lookup by id
+    HASH_FIND_STR(pcppubkey_hash, id, tmp);
+    if(tmp == NULL) {
+      // FIXME: use recipient to lookup by name or email
+      // self-encryption: look if its a secret one
+      pcp_key_t *s = NULL;
+      HASH_FIND_STR(pcpkey_hash, id, s);
+      if(s != NULL) {
+	tmp = pcpkey_pub_from_secret(s);
+	HASH_ADD_STR( pubhash, id, tmp);
+	self = 1;
+      }
+      else {
+	fatal("Could not find a public key with id 0x%s in vault %s!\n",
+	      id, vault->filename);
+	goto erren3;
+      }
     }
     else {
-      fatal("Could not find a public key with id 0x%s in vault %s!\n",
-	  id, vault->filename);
-      goto erren3;
+      // found one by id, copy into local hash
+      pcp_pubkey_t *pub = ucmalloc(sizeof(pcp_pubkey_t));
+      memcpy(pub, tmp, sizeof(pcp_pubkey_t));
+      HASH_ADD_STR( pubhash, id, tmp);
     }
   }
+  else if(recipient != NULL) {
+    // lookup by recipient list
+    // FIXME: implement, iterate through global hashlist
+    //        copy matches into temporary pubhash
+  }
+  else {
+    fatal("id or recipient list required!\n");
+    goto erren3;
+  }
 
-  secret = pcpkey_new(); // DEPRECATED: pcp_find_primary_secret();
+
+  // we're using a random secret keypair on our side
+  secret = pcpkey_new();
 
   if(infile == NULL)
     in = stdin;
   else {
     if((in = fopen(infile, "rb")) == NULL) {
       fatal("Could not open input file %s\n", infile);
-      goto erren3;
+      goto erren2;
     }
   }
 
@@ -134,24 +157,22 @@ int pcpencrypt(char *id, char *infile, char *outfile, char *passwd, char *recipi
   else {
     if((out = fopen(outfile, "wb+")) == NULL) {
       fatal("Could not open output file %s\n", outfile);
-      goto erren3;
+      goto erren2;
     }
   }
 
-  if(debug) {
-    fprintf(stderr, "Using secret key:\n");
-    pcp_dumpkey(secret);
-    fprintf(stderr, "Using publickey:\n");
-    pcp_dumppubkey(pub);
-  }
-
-  size_t clen = pcp_encrypt_file(in, out, secret, pub, self);
+  size_t clen = pcp_encrypt_file(in, out, secret, pubhash, self);
 
   if(clen > 0) {
     fprintf(stderr, "Encrypted %d bytes for 0x%s successfully\n", (int)clen, id);
     return 0;
   }
 
+ erren2:
+  free(pubhash);
+  free(tmp);
+  free(pub);
+
  erren3:
 
   return 1;

src/encryption.h

@@ -34,8 +34,9 @@
 #include "z85.h"
 #include "keyprint.h"
 #include "keyhash.h"
+#include "plist.h"
 
 int pcpdecrypt(char *id, int useid, char *infile, char *outfile, char *passwd);
-int pcpencrypt(char *id, char *infile, char *outfile, char *passwd, char *recipient);
+int pcpencrypt(char *id, char *infile, char *outfile, char *passwd, plist_t *recipient);
 
 #endif // _HAVE_ENCRYPTION_H

src/pcp.c

@@ -52,7 +52,7 @@ int main (int argc, char **argv)  {
   char *keyid = NULL;
   char *id = NULL;
   char *xpass = NULL;
-  char *recipient = NULL;
+  plist_t *recipient = NULL;
   FILE *in;
 
   PCP_EXIT = 0;
@@ -203,8 +203,7 @@ int main (int argc, char **argv)  {
 	strncpy(xpass, optarg, strlen(optarg)+1);
 	break;
       case 'r':
-	recipient = ucmalloc(strlen(optarg)+1);
-	strncpy(recipient, optarg, strlen(optarg)+1);
+	p_add(&recipient, optarg);
 	userec = 1;
 	break;
 
@@ -265,7 +264,10 @@ int main (int argc, char **argv)  {
 	  if(id == NULL)
 	    break;
 	}
-	pcp_exportpublic(id, recipient, xpass, outfile);
+	if (recipient != NULL)
+	  pcp_exportpublic(id, recipient->value, xpass, outfile);
+	else
+	  pcp_exportpublic(id, NULL, xpass, outfile);
 	if(xpass != NULL)
 	  free(xpass);
 	if(recipient != NULL)
@@ -325,28 +327,33 @@ int main (int argc, char **argv)  {
 	break;
 
       case PCP_MODE_ENCRYPT:
-	if(useid) {
+	if(useid == 1 && userec == 0) {
+	  // one dst, FIXME: make id a list as well
 	  id = pcp_normalize_id(keyid);
+	  pcpencrypt(id, infile, outfile, xpass, NULL);
 	}
-	if(useid == 0 && userec == 1) {
-	  id = pcp_find_id_byrec(recipient);
+	else if(useid == 0 && userec == 1) {
+	  // multiple dst
+	  pcpencrypt(id, infile, outfile, xpass, recipient);
 	}
-        if(useid == 0 && userec == 0) {
+        else if(useid == 0 && userec == 0) {
+	  // self mode
           pcp_key_t *k = pcp_find_primary_secret();
 	  id = ucmalloc(17);
           memcpy(id, k->id, 17);
+	  pcpencrypt(id, infile, outfile, xpass, NULL);
         }
-	if(id != NULL) {
-	  pcpencrypt(id, infile, outfile, xpass, recipient);
-	  free(id);
-	  if(xpass != NULL)
-	    free(xpass);
-	  if(recipient != NULL)
-	    free(recipient);
-	}
 	else {
-	  fatal("You need to specify a key id (--keyid) or a recipient (--recipient)!\n");
+	  // -i and -r specified
+	  fatal("You can't specify both -i and -r, use either -i or -r!\n");
 	}
+	if(id != NULL)
+	  free(id);
+	if(xpass != NULL)
+	    free(xpass);
+	if(recipient != NULL)
+	  free(recipient);
+
 	break;
 
       case PCP_MODE_DECRYPT:

src/pcp.h

@@ -46,6 +46,7 @@
 #include "encryption.h"
 #include "signature.h"
 #include "keyhash.h"
+#include "plist.h"
 
 // operation modi
 // perl -e '$x=0; while ($x<100000) { $x++; $x *= 1.7; printf "0x%08X: %d\n", $x, $x }'