always use lowercase version of emailadresses.

src/keymgmt.c

@@ -49,7 +49,7 @@ void pcp_keygen(char *passwd) {
   memcpy(k->owner, owner, strlen(owner) + 1);
 
   char *mail = pcp_getstdin("Enter the email address of the key owner");
-  memcpy(k->mail, mail, strlen(mail) + 1);
+  memcpy(k->mail, _lc(mail), strlen(mail) + 1);
 
   if(debug)
       pcp_dumpkey(k);
@@ -550,6 +550,7 @@ void pcpedit_key(char *keyid) {
 char *pcp_find_id_byrec(char *recipient) {
   pcp_pubkey_t *p;
   char *id = NULL;
+  _lc(recipient);
   for(p=pcppubkey_hash; p != NULL; p=(pcp_pubkey_t*)(p->hh.next)) {
     if(strncmp(p->owner, recipient, 255) == 0) {
       id = ucmalloc(17);
@@ -564,3 +565,11 @@ char *pcp_find_id_byrec(char *recipient) {
   }
   return id;
 }
+
+char *_lc(char *in) {
+  size_t len = strlen(in);
+  int i;
+  for(i=0; i<len; ++i)
+    in[i] = towlower(in[i]);
+  return in;
+}

src/keymgmt.h

@@ -5,6 +5,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
+#include <wctype.h>
 
 #include "randomart.h"
 #include "mac.h"
@@ -32,5 +33,6 @@ int pcp_importsecret (vault_t *vault, FILE *in);
 int pcp_sanitycheck_key(pcp_key_t *key);
 void pcpdelete_key(char *keyid);
 char *pcp_find_id_byrec(char *recipient);
+char *_lc(char *in);
 
 #endif // _HAVE_KEYMGMT_H