mediafire (download): fix recaptcha

Probably fixes mcrapet#80.

mediafire.sh

@@ -257,15 +257,15 @@ mediafire_download() {
 
     # handle captcha (reCaptcha or SolveMedia) if there is one
     if match '<form[^>]*form_captcha' "$PAGE"; then
-        local FORM_CAPTCHA PUBKEY CHALLENGE ID RESP CAPTCHA_DATA
+        local FORM_CAPTCHA PUBKEY CHALLENGE ID RESP CAPTCHA_DATA SECURITY_CODE
 
         FORM_CAPTCHA=$(grep_form_by_name "$PAGE" 'form_captcha') || return
 
-        if match 'recaptcha/api' "$FORM_CAPTCHA"; then
+        if match 'class="g-recaptcha"' "$FORM_CAPTCHA"; then
             log_debug 'reCaptcha found'
 
             local WORD
-            PUBKEY='6LextQUAAAAAALlQv0DSHOYxqF3DftRZxA5yebEe'
+            PUBKEY='6LeGuMUSAAAAACGl-wDE9NNLuUZygPg7iNvMGtXD'
             RESP=$(recaptcha_process $PUBKEY) || return
             { read WORD; read CHALLENGE; read ID; } <<< "$RESP"
 
@@ -287,8 +287,11 @@ mediafire_download() {
 
         log_debug "Captcha data: $CAPTCHA_DATA"
 
+        SECURITY_CODE=$(parse 'security' 'name="security" value="\([^"]*\)' \
+            <<< "$FORM_CAPTCHA") || return
+
         PAGE=$(curl --location -b "$COOKIE_FILE" --referer "$URL" \
-            $CAPTCHA_DATA "$BASE_URL/?$FILE_ID") || return
+            -d "security=$SECURITY_CODE" $CAPTCHA_DATA "$BASE_URL/?$FILE_ID") || return
 
         # Your entry was incorrect, please try again!
         if match 'Your entry was incorrect' "$PAGE"; then