Generator Online SHA1

according to the specification: http://wiki.theory.org/BitTorrentSpecification

info_hash: urlencoded 20-byte SHA1 hash of the value of the info key from the Metainfo file. Note that the value will be a bencoded dictionary, given the definition of the info key above.

torrentMap is my dictionary, I get the info key which is another dictionary, I calculate the hash and I URLencode it.

But I always get an invalid info_hash message when I try to send it to the tracker.

This is my code:

    public String GetInfo_hash() {    String info_hash = "";    ByteArrayOutputStream bos = new ByteArrayOutputStream();    ObjectOutput out = null;    try {        out = new ObjectOutputStream(bos);        out.writeObject(torrentMap.get("info"));        byte[] bytes = bos.toByteArray();        //Map => byte[]        MessageDigest md = MessageDigest.getInstance("SHA1");        info_hash = urlencode(md.digest(bytes));  //Hashing and URLEncoding        out.close();        bos.close();    } catch (Exception ex) {        }    return info_hash;}private String urlencode(byte[] bs) {    StringBuffer sb = new StringBuffer(bs.length * 3);    for (int i = 0; i < bs.length; i++) {        int c = bs[i] & 0xFF;        sb.append('%');        if (c < 16) {            sb.append('0');        }        sb.append(Integer.toHexString(c));    }    return sb.toString();}

The following is my code. I have been trying to fix the code to perform dictionary attack on a hash (SHA-1) and I am getting the following result.P.S. I am a beginner to coding.

import hashlibimport random#plug in the hash that needs to be crackedhash_to_crack = "5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8"#direct the location of the dictionary filedict_file = "C:/Users/kiran/AppData/Local/Programs/Python/Python37/dictionary.txt"def main():    with open(dict_file) as fileobj:        for line in fileobj:            line = line.strip()            if hashlib.sha1(line.encode()).hexdigest() == hash_to_crack:                print ("The password is %s") % (line);                return ""    print ("Failed to crack the hash!")    return ""if __name__ == "__main__":    main()

The result:

RESTART: C:/Users/kiran/AppData/Local/Programs/Python/Python37/Codes/datest1.pyThe password is %sTraceback (most recent call last):  File "C:/Users/kiran/AppData/Local/Programs/Python/Python37/Codes/datest1.py", line 20, in <module>    main()  File "C:/Users/kiran/AppData/Local/Programs/Python/Python37/Codes/datest1.py", line 13, in main    print ("The password is %s") % (line);TypeError: unsupported operand type(s) for %: 'NoneType' and 'str'

I would like to count hash sha1 from word hello. I am using hashlib in python3 but the output is different in bash.Python output:

hashlib.sha1(b"hello").hexdigest()'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d'

Bash output:

echo "hello" | sha1sum f572d396fae9206628714fb2ce00f72e94f2258f  -

When I check sha1 online, I receive result:

aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d

So I assume, the right hash is from python but why I receive wrong hash from bash? Could anybody explain me this problem?

In objective-c it looks like this:

#include <sys/xattr.h>@implementation NSString (reverse)-(NSString*)sha1{    NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];    uint8_t digest[CC_SHA1_DIGEST_LENGTH];    CC_SHA1(data.bytes, (int)data.length, digest);    NSMutableString *output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];    for (int i = 0; i < CC_SHA1_DIGEST_LENGTH; i++)        [output appendFormat:@"%02x", digest[i]];    return output;}@end

I need something like this with Swift, is it possible?

Please, show work example.

Here's 3 example md5 hashes

$ md5 -s "1" && md5 -s "2" && md5 -s "3"MD5 ("1") = c4ca4238a0b923820dcc509a6f75849bMD5 ("2") = c81e728d9d4c2f636f067f89cc14862cMD5 ("3") = eccbc87e4b5ce2fe28308fd9f2a7baf3

Say I wanted to take 8 characters from any hash. Is the beginning part of the hash particularly more "random" than the end? middle? Or are all substrings equally "random"?