base32

问题 I need to check if a geohash string is valid, so I need to check if it's a base32 or not. 回答1: Base32 uses A-Z and 2-7 for the encoding, and adds a padding character = to get a multiple of 8 characters, so you can create a regex to see if the candidate string matches. Using regex.exec a matching string will return the match information, a non-matching string will return null , so you can use an if to test whether a match is true or false. Base32 encodings also must always be a length that is

问题 I need to check if a geohash string is valid, so I need to check if it's a base32 or not. 回答1: Base32 uses A-Z and 2-7 for the encoding, and adds a padding character = to get a multiple of 8 characters, so you can create a regex to see if the candidate string matches. Using regex.exec a matching string will return the match information, a non-matching string will return null , so you can use an if to test whether a match is true or false. Base32 encodings also must always be a length that is

问题 I took the Spentalkux challenge on https://2020.ractf.co.uk/. This is the first time I do a CTF challenge so I went through a solution on https://github.com/W3rni0/RACTF_2020/blob/master/readme.md#spentalkux When I receive this base64 string :

问题 Every TOTP implementation (even FreeOTP by RedHat) I find is using Base32 encoding/decoding for it's generated secret. Why is it not using Base64, since Base32 is using roughly 20% more space and it's (mainly) only advantage is, that it is better human-readable? It is not being shown to the user for generation anyways. While every comment within the implementation says, that its implementation follows RFC6238 / RFC4226, I cannot find anything being said about base32 within the RFC documents.

问题 Every TOTP implementation (even FreeOTP by RedHat) I find is using Base32 encoding/decoding for it's generated secret. Why is it not using Base64, since Base32 is using roughly 20% more space and it's (mainly) only advantage is, that it is better human-readable? It is not being shown to the user for generation anyways. While every comment within the implementation says, that its implementation follows RFC6238 / RFC4226, I cannot find anything being said about base32 within the RFC documents.

问题 I know I can use number_format, but is there a way to represent base32 numbers? For example, hex can be represented with 0x... and octal can be represented with a 0 in the front. Is there anything to represent base32 numbers in php? 回答1: Use the built-in function base_convert. For example: // To convert from base 10 to base 32: echo( base_convert( 12345, 10, 32 ) ); 回答2: I never seen a native notation for base32, but there is ofcourse Base_convert() . 回答3: number_format() cannot be used to

问题 The title of the question says it all. I have been researching SHA-1 and most places I see it being 40 Hex Characters long which to me is 640bit. Could it not be represented just as well with only 10 hex characters 160bit = 20byte. And one hex character can represent 2 byte right? Why is it twice as long as it needs to be? What am I missing in my understanding. And couldn't an SHA-1 be even just 5 or less characters if using Base32 or Base36 ? 回答1: One hex character can only represent 16

问题 i am looking to encode an INT to BASE32 string in SQL Server 2008. Any suggestions of built-in function or perhaps a custom function? Thanks 回答1: Here are a few implementations: http://dpatrickcaldwell.blogspot.com/2009/05/converting-decimal-to-hexadecimal-with.html http://snippets.dzone.com/posts/show/707 http://geekswithblogs.net/bbiales/archive/2009/05/04/131732.aspx 回答2: Pretty sure this will need some debugging but should be close. I translated from a c# function I found that converts

问题 I am working at making what 10 characters go into a text box in my vb project convert into Base32. Here is my code. I am getting an error Value of type 'String' cannot be converted to 'Byte()'. WindowsApplication2 Private Sub Ok_Click(sender As Object, e As EventArgs) Handles Ok.Click Dim DataToEncode As Byte() = txtbox.Text Dim Base32 As String Base32 = DataToEncode.ToBase32String() Auth.Text = Base32 End Sub 回答1: The value in txtbox.Text is a string which can't be automatically converted to

问题 I need custom implementation (library or set of classes/functions) of Base32 or Base64 in PHP Function should return URL safe strings. 回答1: Since you don't have access to base64 build in function I suggest you this : <?php echo bencode("Gabriel Malca"); // R2FicmllbCBNYWxjYQ== function bencode($string='') { $binval = convert_binary_str($string); $final = ""; $start = 0; while ($start < strlen($binval)) { if (strlen(substr($binval,$start)) < 6) $binval .= str_repeat("0",6-strlen(substr($binval