Modernise and fix (ancient) "maurice" demos.

demos/maurice/example1.c

@@ -130,7 +130,7 @@ void main_decrypt(void)
 	char ebuf[512];
 	unsigned int buflen;
         EVP_CIPHER_CTX ectx;
-        unsigned char iv[8];
+        unsigned char iv[EVP_MAX_IV_LENGTH];
 	unsigned char *encryptKey; 
 	unsigned int ekeylen; 
 	EVP_PKEY *privateKey;

demos/maurice/loadkeys.c

@@ -31,9 +31,7 @@ EVP_PKEY * ReadPublicKey(const char *certfile)
   if (!fp) 
      return NULL; 
 
-  x509 = (X509 *)PEM_ASN1_read ((char *(*)())d2i_X509,
-                                   PEM_STRING_X509,
-                                   fp, NULL, NULL);
+  x509 = PEM_read_X509(fp, NULL, 0, NULL);
 
   if (x509 == NULL) 
   {  
@@ -61,10 +59,7 @@ EVP_PKEY *ReadPrivateKey(const char *keyfile)
 	if (!fp)
 		return NULL;
 
-	pkey = (EVP_PKEY*)PEM_ASN1_read ((char *(*)())d2i_PrivateKey,
-                              PEM_STRING_EVP_PKEY,
-                              fp,
-                              NULL, NULL);
+	pkey = PEM_read_PrivateKey(fp, NULL, 0, NULL);
 
 	fclose (fp);