Successfully compile the libmeshlink library with autotools and compile the sample...

[meshlink] / src / libmeshlink.c

diff --git a/src/libmeshlink.c b/src/libmeshlink.c
index 04e3141561b4aa1d582562872de17278d82d69f9..c05d17813a3fbe6e63bee1062222e712f83c5c6d 100644 (file)
--- a/src/libmeshlink.c
+++ b/src/libmeshlink.c
@@ -18,7 +18,180 @@
 */
 
 #include "libmeshlink.h"
+#include "crypto.h"
+#include "ecdsagen.h"
+char *hosts_dir = NULL;
+static char *name = NULL;
 
+
+/*
+  Generate a public/private ECDSA keypair, and ask for a file to store
+  them in.
+*/
+bool ecdsa_keygen(bool ask) {
+       ecdsa_t *key;
+       FILE *f;
+       char *pubname, *privname;
+
+       fprintf(stderr, "Generating ECDSA keypair:\n");
+
+       if(!(key = ecdsa_generate())) {
+               fprintf(stderr, "Error during key generation!\n");
+               return false;
+       } else
+               fprintf(stderr, "Done.\n");
+
+       xasprintf(&privname, "%s" SLASH "ecdsa_key.priv", confbase);
+       //f = ask_and_open(privname, "private ECDSA key", "a", ask, 0600); //this function is not ported to lib because makes no sense
+       free(privname);
+
+       if(!f)
+               return false;
+
+       if(!ecdsa_write_pem_private_key(key, f)) {
+               fprintf(stderr, "Error writing private key!\n");
+               ecdsa_free(key);
+               fclose(f);
+               return false;
+       }
+
+       fclose(f);
+
+       if(name)
+               xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+       else
+               xasprintf(&pubname, "%s" SLASH "ecdsa_key.pub", confbase);
+
+       //f = ask_and_open(pubname, "public ECDSA key", "a", ask, 0666);
+       free(pubname);
+
+       if(!f)
+               return false;
+
+       char *pubkey = ecdsa_get_base64_public_key(key);
+       fprintf(f, "ECDSAPublicKey = %s\n", pubkey);
+       free(pubkey);
+
+       fclose(f);
+       ecdsa_free(key);
+
+       return true;
+}
+
+/*
+  Generate a public/private RSA keypair, and ask for a file to store
+  them in.
+*/
+bool rsa_keygen(int bits, bool ask) {
+       rsa_t *key;
+       FILE *f;
+       char *pubname, *privname;
+
+       fprintf(stderr, "Generating %d bits keys:\n", bits);
+
+       if(!(key = rsa_generate(bits, 0x10001))) {
+               fprintf(stderr, "Error during key generation!\n");
+               return false;
+       } else
+               fprintf(stderr, "Done.\n");
+
+       xasprintf(&privname, "%s" SLASH "rsa_key.priv", confbase);
+       //f = ask_and_open(privname, "private RSA key", "a", ask, 0600);
+       free(privname);
+
+       if(!f)
+               return false;
+
+       if(!rsa_write_pem_private_key(key, f)) {
+               fprintf(stderr, "Error writing private key!\n");
+               fclose(f);
+               rsa_free(key);
+               return false;
+       }
+
+       fclose(f);
+
+       if(name)
+               xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+       else
+               xasprintf(&pubname, "%s" SLASH "rsa_key.pub", confbase);
+
+       //f = ask_and_open(pubname, "public RSA key", "a", ask, 0666);
+       free(pubname);
+
+       if(!f)
+               return false;
+
+       if(!rsa_write_pem_public_key(key, f)) {
+               fprintf(stderr, "Error writing public key!\n");
+               fclose(f);
+               rsa_free(key);
+               return false;
+       }
+
+       fclose(f);
+       rsa_free(key);
+
+       return true;
+}
+
+static bool try_bind(int port) {
+       struct addrinfo *ai = NULL;
+       struct addrinfo hint = {
+               .ai_flags = AI_PASSIVE,
+               .ai_family = AF_UNSPEC,
+               .ai_socktype = SOCK_STREAM,
+               .ai_protocol = IPPROTO_TCP,
+       };
+
+       char portstr[16];
+       snprintf(portstr, sizeof portstr, "%d", port);
+
+       if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
+               return false;
+
+       while(ai) {
+               int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
+               if(!fd)
+                       return false;
+               int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
+               closesocket(fd);
+               if(result)
+                       return false;
+               ai = ai->ai_next;
+       }
+
+       return true;
+}
+
+int check_port(char *name) {
+       if(try_bind(655))
+               return 655;
+
+       fprintf(stderr, "Warning: could not bind to port 655. ");
+
+       for(int i = 0; i < 100; i++) {
+               int port = 0x1000 + (rand() & 0x7fff);
+               if(try_bind(port)) {
+                       char *filename;
+                       xasprintf(&filename, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+                       FILE *f = fopen(filename, "a");
+                       free(filename);
+                       if(!f) {
+                               fprintf(stderr, "Please change tinc's Port manually.\n");
+                               return 0;
+                       }
+
+                       fprintf(f, "Port = %d\n", port);
+                       fclose(f);
+                       fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
+                       return port;
+               }
+       }
+
+       fprintf(stderr, "Please change tinc's Port manually.\n");
+       return 0;
+}
 //tinc_setup() should basically do what cmd_init() from src/tincctl.c does, except it doesn't have to generate a tinc-up script.
 bool tinc_setup(const char* tinc_conf, const char* name) {
        if(!access(tinc_conf, F_OK)) {