💾 Archived View for gmi.noulin.net › gitRepositories › sodiumTest › file › server.c.gmi captured on 2024-08-31 at 13:31:30. Gemini links have been rewritten to link to archived content
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server.c (3206B)
1 #! /usr/bin/env sheepy
2
3 #include "libsheepyObject.h"
4
5 #include <sys/socket.h>
6 #include <netinet/in.h>
7
8 #include "sel.h"
9
10 int main(int ac, char **av){
11
12 setLogMode(LOG_FUNC);
13
14 if (not selInit()) ret 1;
15
16 // generate keys
17 keyst serverKeys = init0Var;
18
19 newKeysBuf(&serverKeys);
20
21
22 // start event loop
23 int sock;
24 struct sockaddr_in server;
25 int mysock;
26 char buf[128*1024];
27 int rval;
28
29 sock = socket(AF_INET, SOCK_STREAM, 0);
30 if (sock < 0){
31 perror("Failed to create socket");
32 ret 1;
33 }
34
35 server.sin_family = AF_INET;
36 server.sin_addr.s_addr = INADDR_ANY;
37 server.sin_port = htons(5000);
38
39 if (bind(sock, (struct sockaddr *) &server, sizeof(server))){
40 perror("bind failed");
41 ret 1;
42 }
43
44 listen(sock, 5);
45
46 forever {
47 mysock = accept(sock, (struct sockaddr *)0, 0);
48 if (mysock == -1)
49 perror("accept failed");
50 else {
51
52 bool snd(void *buf, size_t sz) {
53 logVarG(sz);
54 if(send(mysock, buf, sz, 0) < 0){
55 perror("send failed");
56 close(mysock);
57 ret no;
58 }
59 ret yes;
60 }
61
62 bool rcv(void *buf, size_t sz) {
63 rval = recv(mysock, buf, sizeof(buf), 0);
64 if (rval < 0) {
65 perror("reading message");
66 ret no;
67 }
68 else if (rval == 0) {
69 logI("Ending connection");
70 close(mysock);
71 ret no;
72 }
73 logVarG(rval);
74 ret yes;
75 }
76
77 /* memset(buf, 0, sizeof(buf)); */
78 /* if ((rval = recv(mysock, buf, sizeof(buf), 0)) < 0) { */
79
80 // store remote public key
81 if ((rval = recv(mysock, &serverKeys.remotePublicKey, sizeof(serverKeys.remotePublicKey), MSG_WAITALL)) < 0) {
82 perror("reading message");
83 close(mysock);
84 continue;
85 }
86 else if (rval == 0) {
87 logI("Ending connection");
88 close(mysock);
89 continue;
90 }
91 if (rval != sizeof(serverKeys.remotePublicKey)) {
92 logW("Didn't get complete client public key");
93 }
94
95 logD("Remote public key");
96 loghex(serverKeys.remotePublicKey, sizeof(serverKeys.remotePublicKey));
97 put;
98
99 // send public key
100 if (!snd(&serverKeys.publicKey, sizeof(serverKeys.publicKey))) continue;
101
102 // get encrypted message
103 int len;
104 if (!rcv(&len, sizeof(len))) continue;
105 rval = recv(mysock, buf, len, MSG_WAITALL);
106 if (rval < 0) {
107 perror("reading message");
108 close(mysock);
109 continue;
110 }
111 else if (rval == 0) {
112 logI("Ending connection");
113 close(mysock);
114 continue;
115 }
116 logVarG(rval);
117
118 u8 decrypted[1000];
119 len = selPublicDecrypt(decrypted, sizeof(decrypted), buf, rval, &serverKeys);
120
121 if (!len) {
122 logE("failed to decrypt");
123 close(mysock);
124 continue;
125 }
126
127 decrypted[len] = 0;
128
129 logI("decrypted: %s", decrypted);
130
131 // send encrypted response
132 serverKeys.nonce[0] = 1;
133
134 char *msg = "OK";
135
136 len = selPublicEncrypt(buf, sizeof(buf), msg, strlen(msg), &serverKeys);
137
138 logVarG(len);
139
140 snd(&len, sizeof(len));
141 snd(buf, len);
142
143 close(mysock);
144 }
145 }
146 }
147 // vim: set expandtab ts=2 sw=2: