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61 lines
2.1 KiB
61 lines
2.1 KiB
/*
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HTTP auth implementation. Only does basic authentication for now.
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*/
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/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain
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* this notice you can do whatever you want with this stuff. If we meet some day,
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* and you think this stuff is worth it, you can buy me a beer in return.
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* ----------------------------------------------------------------------------
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*/
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#include <esp8266.h>
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#include "auth.h"
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#include "base64.h"
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httpd_cgi_state authBasic(HttpdConnData *connData) {
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const char *forbidden="401 Forbidden.";
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int no=0;
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int r;
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char hdr[(AUTH_MAX_USER_LEN+AUTH_MAX_PASS_LEN+2)*10];
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char userpass[AUTH_MAX_USER_LEN+AUTH_MAX_PASS_LEN+2];
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char user[AUTH_MAX_USER_LEN];
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char pass[AUTH_MAX_PASS_LEN];
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if (connData->conn==NULL) {
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//Connection aborted. Clean up.
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return HTTPD_CGI_DONE;
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}
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r=httpdGetHeader(connData, "Authorization", hdr, sizeof(hdr));
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if (r && strncmp(hdr, "Basic", 5)==0) {
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r=base64_decode(strlen(hdr)-6, hdr+6, sizeof(userpass), (unsigned char *)userpass);
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if (r<0) r=0; //just clean out string on decode error
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userpass[r]=0; //zero-terminate user:pass string
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// printf("Auth: %s\n", userpass);
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while (((AuthGetUserPw)(connData->cgiArg))(connData, no,
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user, AUTH_MAX_USER_LEN, pass, AUTH_MAX_PASS_LEN)) {
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//Check user/pass against auth header
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if (strlen(userpass)==strlen(user)+strlen(pass)+1 &&
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strncmp(userpass, user, strlen(user))==0 &&
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userpass[strlen(user)]==':' &&
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strcmp(userpass+strlen(user)+1, pass)==0) {
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//Authenticated. Yay!
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return HTTPD_CGI_AUTHENTICATED;
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}
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no++; //Not authenticated with this user/pass. Check next user/pass combo.
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}
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}
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//Not authenticated. Go bug user with login screen.
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httpdStartResponse(connData, 401);
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httpdHeader(connData, "Content-Type", "text/plain");
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httpdHeader(connData, "WWW-Authenticate", "Basic realm=\""HTTP_AUTH_REALM"\"");
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httpdEndHeaders(connData);
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httpdSend(connData, forbidden, -1);
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//Okay, all done.
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return HTTPD_CGI_DONE;
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}
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