diff -r 5db6178d8b58 -r 493128ef1b12 dav/main.c
--- a/dav/main.c	Tue Aug 13 11:19:22 2013 +0200
+++ b/dav/main.c	Tue Aug 13 12:44:23 2013 +0200
@@ -42,7 +42,9 @@
 #include "crypto.h"
 #include "main.h"
 
-void xmlerrorfnc(void * ctx, const char * msg, ... ) {
+static DavContext *ctx;
+
+void xmlerrorfnc(void * c, const char * msg, ... ) {
     // nothing
 }
 
@@ -50,6 +52,8 @@
     xmlGenericErrorFunc fnc = xmlerrorfnc;
     initGenericErrorDefaultFunc(&fnc);
     load_config();
+    ctx = dav_context_new();
+    dav_add_namespace(ctx, "U", "http://www.uap-core.de/");
     
     if(argc < 2) {
         fprintf(stderr, "Missing command\n");
@@ -134,8 +138,6 @@
         return -1;
     }
     
-    
-    DavContext *ctx = dav_context_new();
     DavSession *sn = NULL;
     char *url = a->argv[0];
     char *root = NULL;
@@ -170,8 +172,6 @@
         return -1;
     }
     
-    DavContext *ctx = dav_context_new();
-    dav_add_namespace(ctx, "U", "http://www.uap-core.de/");
     DavSession *sn = NULL;
     char *url = a->argv[0];
     char *root = NULL;
@@ -190,33 +190,69 @@
         fprintf(stderr, "error\n");
         return -1;
     }
-    FILE *out = fopen(res->name, "w");
+    
+    /*
+     * determine the output file
+     * use stdout if the output file is -
+     */
+    char *outfile = cmd_getoption(a, "output");
+    if(!outfile) {
+        outfile = res->name;
+    }
+    FILE *out = !strcmp(outfile, "-") ? stdout : fopen(outfile, "w");
     if(!out) {
         fprintf(stderr, "cannot open output file\n");
         return -1;
     }
     
+    
+    /*
+     * if the -p (plain) option is specified we don't decrypt files
+     * use a key specified with the -k (key) option, a key from the
+     * key property or the repository default key
+     */
+    void *out_stream = out;
+    dav_write_func write_func = (dav_write_func)fwrite;
     AESDecrypter *dec = NULL;
-    char *keyprop = dav_get_property_ns(res, "http://www.uap-core.de/", "crypto-key");
-    if(repo) {
-        Key *key = get_key(keyprop);
-        if(repo->encrypt && key) {
+    char *plain = cmd_getoption(a, "plain");
+    char *keyname = cmd_getoption(a, "key");
+    if(!plain) {
+        char *keyprop = dav_get_property_ns(
+                res,
+                "http://www.uap-core.de/",
+                "crypto-key");
+        Key *key = NULL;
+        char *kn = NULL;
+        if(keyname) {
+            kn = keyname;
+        } else if(keyprop) {
+            kn = keyprop;
+        } else if(repo && repo->decrypt) {
+            kn = repo->default_key;
+        }
+        if(kn) {
+            key = get_key(kn);
+            if(!key) {
+                fprintf(stderr, "Key %s not found!\nAbort.\n", kn);
+                // TODO: free
+                return -1;
+            }
+        }
+        
+        if(key) {
             dec = aes_decrypter_new(key, out, (dav_write_func)fwrite);
+            out_stream = dec;
+            write_func = (dav_write_func)aes_write;
         }
     }
     
-    int ret;
-    if(dec && keyprop) {
-        ret = dav_get_content(res, dec, (dav_write_func)aes_write);
-    } else {
-        ret = dav_get_content(res, out, (dav_write_func)fwrite);
-    }
+    int ret = dav_get_content(res, out_stream, write_func);
     if(dec) {
         aes_decrypter_close(dec);
     }
     fclose(out);
-    if(ret) {
-        unlink(res->name);
+    if(ret && strcmp(outfile, "-")) {
+        unlink(outfile);
     }
     
     return 0;
@@ -227,7 +263,6 @@
         return -1;
     }
     
-    DavContext *ctx = dav_context_new();
     DavSession *sn = NULL;
     char *url = a->argv[0];
     char *file = a->argv[1];
@@ -242,26 +277,40 @@
         sn = dav_session_new(ctx, root);
     }
     
+    /*
+     * use stdin if the input file is -
+     */
+    FILE *in = !strcmp(file, "-") ? in : fopen(file, "r");
+    if(!in) {
+        fprintf(stderr, "cannot open input file\n");
+        return -1;
+    }
+    
     DavResource *res = dav_resource_new(sn, path);
     if(!res) {
         fprintf(stderr, "error\n");
         return -1;
     }
-    FILE *in = fopen(file, "r");
-    if(!in) {
-        fprintf(stderr, "cannot open input file\n");
-        return -1;
-    }
+    
     AESEncrypter *enc = NULL;
-    if(repo) {
-        Key *key = get_key(repo->default_key);
-        if(repo->encrypt && key) {
+    char *keyname = cmd_getoption(a, "key");
+    char *kn = NULL;
+    char *plain = cmd_getoption(a, "plain");
+    if(!plain && (keyname || repo)) {
+        kn = keyname ? keyname : repo->default_key;
+        Key *key = get_key(kn);
+        if(!key) {
+            fprintf(stderr, "Key %s not found!\nAbort.\n", kn);
+            // TODO: free
+            return -1;
+        }
+        if(keyname || repo->encrypt) {
             enc = aes_encrypter_new(key, in, (dav_read_func)fread);
         }
     }
     if(enc) {
         dav_set_content(res, enc, (dav_read_func)aes_read);
-        dav_set_property_ns(res, "http://www.uap-core.de/", "crypto-key", repo->default_key);
+        dav_set_property_ns(res, "http://www.uap-core.de/", "crypto-key", kn);
     } else {
         dav_set_content(res, in, (dav_read_func)fread);
     }
@@ -271,6 +320,9 @@
         fclose(in);
         return -1;
     }
+    if(enc) {
+        aes_encrypter_close(enc);
+    }
     fclose(in);
     return 0;
 }