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Rev Author Line No. Line
1 nishi 1 
/* $Id: util.c 29 2024-08-21 19:23:54Z nishi $ */
2 
 
3 
#include "rv_util.h"
4 
 
5 
#include "../config.h"
6 
 
7 
#include "rv_version.h"
5 nishi 8 
#include "rv_db.h"
1 nishi 9 
 
10 
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
15 nishi 13 
#include <unistd.h>
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#include <sys/wait.h>
1 nishi 15 
 
3 nishi 16 
char* rv_strcat(const char* a, const char* b) {
1 nishi 17 
	char* str = malloc(strlen(a) + strlen(b) + 1);
18 
	memcpy(str, a, strlen(a));
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	memcpy(str + strlen(a), b, strlen(b));
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	str[strlen(a) + strlen(b)] = 0;
21 
	return str;
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}
23 
 
3 nishi 24 
char* rv_strcat3(const char* a, const char* b, const char* c) {
1 nishi 25 
	char* tmp = rv_strcat(a, b);
26 
	char* str = rv_strcat(tmp, c);
27 
	free(tmp);
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	return str;
29 
}
30 
 
3 nishi 31 
char* rv_strdup(const char* str) { return rv_strcat(str, ""); }
1 nishi 32 
 
3 nishi 33 
void rv_error_http(void) {
1 nishi 34 
	printf("Content-Type: text/plain\r\n");
35 
	printf("Status: 500 Internal Server Error\r\n");
36 
	printf("\r\n");
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	printf("This is RepoView version %s, named `%s`.\n", rv_get_version(), INSTANCE_NAME);
38 
	printf("Unrecoverable error has occured.\n");
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	printf("Admin contact: %s\n", INSTANCE_ADMIN);
40 
	printf("Developer contact: Nishi <nishi@nishi.boats>\n");
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	printf("-----\n");
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}
43 
 
3 nishi 44 
int hex_to_num(char c) {
45 
	if('0' <= c && c <= '9') {
1 nishi 46 
		return c - '0';
3 nishi 47 
	} else if('a' <= c && c <= 'f') {
1 nishi 48 
		return c - 'a' + 10;
3 nishi 49 
	} else if('A' <= c && c <= 'F') {
1 nishi 50 
		return c - 'A' + 10;
51 
	}
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	return 0;
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}
54 
 
3 nishi 55 
char* rv_url_decode(const char* str) {
1 nishi 56 
	char* r = malloc(1);
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	r[0] = 0;
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	int i;
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	char cbuf[2];
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	cbuf[1] = 0;
3 nishi 61 
	for(i = 0; str[i] != 0; i++) {
62 
		if(str[i] == '%') {
1 nishi 63 
			if(str[i + 1] == 0) break;
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			if(str[i + 2] == 0) break;
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			cbuf[0] = (hex_to_num(str[i + 1]) << 4) | hex_to_num(str[i + 2]);
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			char* tmp = r;
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			r = rv_strcat(tmp, cbuf);
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			free(tmp);
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			i += 2;
15 nishi 70 
		} else if(str[i] == '+') {
71 
			char* tmp = r;
72 
			r = rv_strcat(tmp, " ");
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			free(tmp);
3 nishi 74 
		} else {
1 nishi 75 
			cbuf[0] = str[i];
76 
			char* tmp = r;
77 
			r = rv_strcat(tmp, cbuf);
78 
			free(tmp);
79 
		}
80 
	}
81 
	return r;
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}
5 nishi 83 
 
84 
char* rv_new_token(const char* username) {
85 
	const char tokenstr[] = "0123456789abcdefghijklmnopqrstuvwxyz";
86 
	char* token = malloc(17);
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	token[16] = 0;
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	int i;
29 nishi 89 
	unsigned char uc;
90 
	FILE* f = fopen("/dev/urandom", "rb");
5 nishi 91 
regenerate:
92 
	for(i = 0; i < 16; i++) {
29 nishi 93 
		fread(&uc, 1, 1, f);
94 
		token[i] = tokenstr[uc % strlen(tokenstr)];
5 nishi 95 
	}
29 nishi 96 
	fclose(f);
5 nishi 97 
	if(rv_has_token(token)) goto regenerate;
98 
	rv_save_token(username, token);
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	return token;
100 
}
15 nishi 101 
 
102 
void rv_add_auth(const char* username, const char* password) {
103 
	pid_t pid = fork();
104 
	if(pid == 0) {
105 
		char* cmd[] = {"htpasswd", "-b", APACHE_PASSWD, (char*)username, (char*)password, NULL};
106 
		execvp("htpasswd", cmd);
107 
		_exit(0);
108 
	} else {
109 
		waitpid(pid, 0, 0);
110 
	}
111 
}