Wifi ascii to hex
Most devices (Modems/Routers) require you to enter WEP/WPA keys during Wireless security configuration. Unlike regular passwords, these keys have strict length requirements based on type of security mechanism (WEP, WPA, WPA2,WPA3 etc).
- WEP — 64-bit — 5 Characters
- WEP — 128-bit — 13 Characters
- WEP — 152-bit — 16 Characters
- WEP — 256-bit — 29 Characters
- WPA — 64-bit — 8 Characters
- WPA2 — 160-bit — 20 Characters
- WPA2 — 504-bit — 63 Characters
- WPA3 — 128-bit — 16 Characters
- WPA3 — 192-bit — 24 Characters
It generates Secure Wireless keys using combination of lowercase letters, uppercase letters, numbers and special symbols. Also the generated key is displayed in both ASCII and HEX format. So based on what your wireless device asks, you can copy the right form of key.
It is very easy to use this tool and any one can generate secure Wi-Fi key within seconds with few clicks.
‘Wi-Fi Password Key Generator’ is fully portable, does not require JAVA, .NET etc and works on both 32 bit & 64 bit platforms starting from Windows XP to new Windows 11 version.
Standard 64-bit WEP uses a 40 bit key and 24-bit initialization vector (IV) to form the 64-bit key. So 64-bit WEP key is also referred as 40-bit WEP key by some devices. Similarly WEP 128-bit, 152-bit, 256-bit keys are also referred as WEP-104, WEP-128, WEP-232 key respectively.
Here 64-bit WEP key requires you to enter 5 ASCII characters or 10 HEX characters. Similar WEP 128-bit, 152-bit, 256-bit keys need 13 ASCII (26 HEX), 16 ASCII (32 HEX), 29 ASCII (58 HEX) characters respectively.
Due to various weaknesses of WEP, later new wireless security standards WPA (Wi-Fi Protected Access), WPA 2, and WPA3 have been introduced. WPA supports 64-bit key (8 characters) where as WPA2 supports minimum 160-bit (20 ASCII characters) to maximum 504-bit (63 ASCII characters).
New WPA3 protocol supports 128-bit and 192-bit passphrase characters. You can use WiFi Password Key Generator to create passphrase for all these protocols including new WPA3
- Instantly generate Wireless WEP,WPA,WPA2,WPA3 Keys
- Supports all kind of length combinations based on Wi-Fi Security type
- Generates secure key using lowercase, uppercase, numbers & special symbols
- Displays key in HEX & ASCII format
- Copy button to quickly copy the key
- Auto copy the generated Hex key to clipboard
- Automatically Remember and Restore user settings
- Free and Easy to Use tool with simple & elegant GUI interface
- It does not require JAVA, .NET or any other components
- Includes Installer for local Installation & Uninstallation
- Supports all Windows platforms (Windows XP to Windows 11)
[Windows 32 bit] C:\Program Files\SecurityXploded\WiFiPasswordKeyGenerator [Windows 64 bit] C:\Program Files (x86)\SecurityXploded\WiFiPasswordKeyGenerator
License : Freeware
Platform : Windows 11,10,8,7,Vista,XP (32-bit/64-bit)
WPA key calculation
A wireless network with WPA-PSK encryption requires a passphrase (the pre-shared key) to be entered to get access to the network. Most wireless drivers accept the passphrase as a string of at most 63 characters, and internally convert the passphrase to a 256-bit key. However, some software also allows the key to be entered directly in the form of 64 hexadecimal digits. It is therefore occasionally useful to be able to calculate the 64-digit hexadecimal key that correspons to a given passphrase.
This page explains how WPA software computes the hexadecimal key from the passphrase and the network SSID. The form below demonstrates this calculation for any given input.
| Network SSID: |
| WPA passphrase: |
| Hexadecimal key: |
How to use the form
Enter the network SSID string (at most 32 alphanumeric characters) and the passphrase (at least 8 and at most 63 ASCII characters) in the form above and click Calculate . Make sure that you don’t accidentally type space characters before/after the string. The derived key will appear in the form as a sequence of 64 hexadecimal digits.
The Test button can be used to check that your web browser computes the correct result for a sample case. Testing is recommended, since a broken Javascript engine may compute incorrect key values. A number of popular web browsers have been tested, and all of them seem to work correctly.
A word about entering passwords on web forms
Of course, blindly entering your SSID and passphrase in a web form would be quite stupid indeed. However, this particular form is safe because it does not send any data over the network; all calculations are done in Javascript on your own computer.
Please don’t even take my word for it. Instead, download this webpage to your computer, look through the HTML code to make sure I don’t play any tricks, then open the downloaded page in your browser and use it.
Details of the calculation
For WPA-PSK encryption, the binary key is derived from the passphrase according to the following formula:
Key = PBKDF2(passphrase, ssid, 4096, 256)
The function PBKDF2 is a standardized method to derive a key from a passphrase. It is specified in RFC2898 with a clear explanation on how to compute it. The function needs an underlying pseudorandom function. In the case of WPA, the underlying function is HMAC-SHA1 .
SHA1 is a function that computes a 160-bit hash from an arbitrary amount of input data. It is clearly explained in RFC3174. HMAC is a standardized method to turn a cryptographic hash function into a keyed message authentication function. It is specified in RFC2104.
To summarize, the key derivation process involves iterating a HMAC-SHA1 function 4096 times, and then doing that again to produce more key bits.
Programming and Scripting :: Convert ascii wifi key to hex
On at least one wifi network I’ve tried that required an ascii WEP key, the s: prefix option for dsl’s iwconfig — signifying an ascii key — just would not work for me. After I used the hex equivalent instead, it connected immediately.
So I thought a converter from asci keys to hex keys might be handy.
Anyway it made a compact little homework exercise for myself, so thought I might share.
ASCIKEY=»»
echo «Type in ascii wifi key:»
while read -s -n 1 ASCHAR; do
[ «$ASCHAR» = «» ] && break
printf «%X» $(printf «%d» \'»$ASCHAR»\’)
ASCIKEY=$$
done
Also did it differently using perl, after googling for the gist:
my $asciichars = shift;
chomp $asciichars;
User should insert hyphens every four chars into the resulting hex key when using with iwconfig. Isn’t it a colon after every 2 characters? But I don’t use wifi.
Anyways, I thought it might be more handy to have the ascii phrase to be passed as an argument.
printf $1 |
while read -s -n 1 ASCHAR; do
if [ $FIRST -eq 0 ]; then
printf «:»
else
FIRST=0
fi
[ «$ASCHAR» = «» ] && break
printf «%X» $(printf «%d» \'»$ASCHAR»\’)
done
I believe roberts did use to post a perl link that would do this as well (not sure if included in DSL). Perhaps some kind of integration of this could be used in iwconfig?
EDIT:
— yes, I meant the gui tool in DSL instead of iwconfig
— added the reading of spaces (I think they can be used. ) Thx for interface variant.. The interesting point for me was using bash printf to convert to ordinal then to hex.
No colon in key string for me.
I posted the perl since I did that first — but the core came out of the web — no credit to me other than googling and making it cli. Haven’t seen Robert’s link.
| Quote |
| Perhaps some kind of integration of this could be used in iwconfig? |
I guess you mean in dsl’s wifi setup GUI. I never use that, but if there’s a bug in iwconfig on certain ascii keys with s: perhaps either there’s a fix or a ‘convert to hex’ button might be good.
Has anyone else had trouble with the s: option in iwconfig? Perhaps it was just the one network . So it’s just the ascii key number converted to hex? Thanks, I was wondering about that..
Could you also include a reverse function in that, if it’s going to DSL?
| Quote |
| include a reverse function |
In dsl or no, if you want one I’ll have a go.
Just wondering — why would you want to convert a hex key to ascii — to make it easier to remember perhaps? Next Page.
original here.
Programming and Scripting :: Convert ascii wifi key to hex
Yes. I can also think for situations where you would want to check if it’s still correct, without going to the browser, the router config page, logging in etc and then using this in asci2hex way.. Some programs give the key with the dash after every four characters, some with colon after every two. It doesn’t really matter, as they are just there to ease reading, and if you happen to give the «wrong» one, the program will just convert it to the form it likes better. That clarifies that. Curaga, here’s quick ‘n’ dirty reverse:
#
# hex2ascikey.sh
# Takes hex wifi key as argument and prints asci
#
Will ignore — or : in input.
These are for 13 char asci-equivalent keys. A Perl version, since I definitely need the practice:
#
# hex2ascikey.pl
# Takes hex wifi key as argument and prints asci
#
my $hexkey = shift;
chomp $hexkey;
$hexkey =~ s/^[+]+//; # or can’t cope with a leading +
$hexkey =~ s/[:-]//g;
# Insert space every 2 chars
$hexkey =~ s/([^\s])/$1 /gs;
foreach my $c (@A)my $dec = hex($c);
print chr($dec);
>
EDIT: Perl version as is can’t cope with $ as an illegal input hex char. Gives superior built-in error messaging and tells you that it is ignoring which illegal hex chars.
The bash script runs in around the same time or faster, despite the pipes (subshells), read and 2 sed invocations — not that speed matters here.
Equivalent functionality in bash to both flag and remove illegal hex chars is like:
#
# hex2ascikey.sh
# Takes hex wifi key as argument and prints asci
#
echo -n $1 | sed ‘s/[0-9A-Fa-f]//g
t message
:message s/^.\+$/Ignoring non-hex chars &\n/’
echo -n $1 | sed ‘s/[^0-9A-Fa-f]//g’ | while read -n 2 HEXCH; do
printf «%s\x$HEXCH» 2>/dev/null; done | sed ‘s/\\\x$//’
which is more sed than I usually care to learn and shows why I like Perl. No doubt this could be made better. To cope with $ as a non-hex input char, bash script argument needs to be put in single quotes.
A more readable alternative bash script might parse the input char by char instead. Next Page.
original here.