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annotate sqlickrypt.c @ 192:addc4e3456c4

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Begin adding systemd compatibility. The Makefile can be used to build and install rlgwebd. On systems with systemd, the unit file controls starting and stopping the service, and the shell script is not needed. The unit file uses KillMode=none because socat does not actually stop rlgwebd, it only asks it to stop and exits without waiting for a response. Until a better stopping method is introduced, this setting prevents systemd from killing all the rlgwebd processes as soon as socat exits.
author John "Elwin" Edwards
date Fri, 01 Jan 2016 16:11:34 -0500
parents bc69717ff386
children
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <string.h>
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4 #include <ctype.h>
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5 #include <sqlite3.h>
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6 #include <unistd.h>
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7 #include <crypt.h>
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8
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9 #define DATABASE "/dgldir/dgamelaunch.db"
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10 #define IBUFSIZE 200
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11 #define RANDOMSRC "/dev/urandom"
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13 /* General idea for return status:
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14 * 0: success
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15 * 1: password check failed
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16 * 2: username not found
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17 * 3: database error
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18 * 4: invalid input
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19 */
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20
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21 /* Opens the database and, less obviously, initializes a statement. */
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22 int opendb(sqlite3 **dbp, sqlite3_stmt **stmtp, char *query) {
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23 int status;
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24 status = sqlite3_open(DATABASE, dbp);
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25 if (status) {
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26 sqlite3_close(*dbp);
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27 exit(3);
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28 }
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29 sqlite3_prepare_v2(*dbp, query, -1, stmtp, NULL);
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30 if (*stmtp == NULL) {
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31 sqlite3_close(*dbp);
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32 exit(3);
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33 }
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34 return 0;
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35 }
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36
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37 void cleanup(sqlite3 *db, sqlite3_stmt *stmt, int status) {
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38 if (stmt)
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39 sqlite3_finalize(stmt);
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40 sqlite3_close(db);
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41 if (status)
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42 exit(status);
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43 return;
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44 }
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45
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46 char encode64(unsigned char c) {
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47 if (c < 26)
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48 return 'a' + c;
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49 else if (c < 52)
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50 return 'A' + c - 26;
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51 else if (c < 62)
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52 return '0' + c - 52;
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53 else if (c == 62)
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54 return '.';
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55 else
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56 return '/';
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57 }
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58
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59 /* Initializes a SHA-512 salt. salt must contain at least 20 bytes. */
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60 void setsalt(char *salt) {
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61 unsigned char rnbytes[3], rnvals[4];
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62 FILE *urandom;
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63 int loop;
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64 salt[0] = salt[2] = salt[19] = '$'; /* Delimiters */
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65 salt[1] = '6'; /* SHA-512 */
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66 urandom = fopen(RANDOMSRC, "r");
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67 for (loop = 0; loop < 4; loop++) {
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68 fread(rnbytes, 1, 3, urandom);
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69 rnvals[0] = rnbytes[0] >> 2;
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70 rnvals[1] = ((rnbytes[0] & 0x03) << 4) | ((rnbytes[1] & 0xf0) >> 4);
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71 rnvals[2] = ((rnbytes[1] & 0x0f) << 2) | ((rnbytes[2] & 0xc0) >> 6);
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72 rnvals[3] = rnbytes[2] & 0x3f;
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73 salt[loop * 4 + 3] = encode64(rnvals[0]);
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74 salt[loop * 4 + 4] = encode64(rnvals[1]);
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75 salt[loop * 4 + 5] = encode64(rnvals[2]);
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76 salt[loop * 4 + 6] = encode64(rnvals[3]);
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77 }
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78 fclose(urandom);
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79 }
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80
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81 int check(char *uname, char *pw) {
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82 char *pwhash, *comphash;
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83 char *query = "SELECT password FROM dglusers WHERE username=?;";
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