Complete

labs/lab5/program1.cpp

+// gcc program1.c -o program1 -lssl
+
+#include <stdio.h>
+#include <string.h>
+#include <openssl/md5.h>
+
+int main()
+{
+    unsigned char digest[MD5_DIGEST_LENGTH];
+    char string[] = "happy";
+    
+    MD5((unsigned char*)&string, strlen(string), (unsigned char*)&digest);    
+
+    char mdString[33];
+
+    for(int i = 0; i < 16; i++)
+         sprintf(&mdString[i*2], "%02x", (unsigned int)digest[i]);
+
+    printf("md5 digest: %s\n", mdString);
+
+    return 0;
+}
\ No newline at end of file

labs/lab5_prateek/doc1.txt

+Office Order
+
+Permission granted to Agent Z for procument of 100 desktop computers for the organization.
+
+- Gabbar

labs/lab5_prateek/doc2.txt

+hello how are you whats up dude Z to enter high security area

labs/lab5_prateek/strong.py

+import sys
+import hashlib as hashl
+f1 = open("doc1.txt", "r+", encoding = 'utf-8')
+f2 = open("doc2.txt", "r+", encoding = 'utf-8')
+L = str(f1.read())
+M = str(f2.read())
+Listofhashes = []
+for i in range(10):
+#hd1 = hashl.md5(L)
+    hd1 = hashl.md5(L.encode('utf-8'))
+    s = str(hd1.hexdigest())[:2]
+    Listofhashes.append(s)
+    L = L + " "
+d = 0
+print(Listofhashes)
+while True:
+    d+=1
+    hd2 = hashl.md5(M.encode('utf-8'))
+    z= str( hd2.hexdigest())[:2]
+    print(z)
+    if z in Listofhashes:
+        print(d)
+        break
+    M = M + " "
\ No newline at end of file

labs/lab5_prateek/weak.py

+import sys
+import hashlib as hashl
+f1 = open("doc1.txt", "r+", encoding = 'utf-8')
+f2 = open("doc2.txt", "r+", encoding = 'utf-8')
+L = str(f1.read())
+M = str(f2.read())
+hd1 = hashl.md5(L.encode('utf-8'))
+hd2 = hashl.md5(M.encode('utf-8'))
+d = 0
+test =str(hd1.hexdigest())[:2]
+print(test)
+while True:
+    L = L + " " 
+    hd2 = hashl.md5(L.encode('utf-8'))
+    d+=1
+    Y =  str(hd2.hexdigest())[:2] 
+    if Y == test:
+        print(d)
+        break

prateek_res/cheatallabs

+
+
+Prac 1 - freq analysis
+
+sed 's/old/new/g' file_name > outfile
+sed -i 's/old/new/g' file_name   //For updating in new file
+
+
+Prac 2- vigenere
+
+
+prac3- openssl
+
+AES encrytpion 
+
+openssl enc -aes-128-cbc -e -in plain.txt -out cipher.bin -K 00112233445566778889aabbccddeeff -iv 0102030405060708;
+
+
+Open Encrypted image file:
+
+head -c 54 plain.bmp > header" ; "tail -c +55 cipher.bmp > body" ; "cat header body > new.bmp"
+
+
+AES Decryption 
+
+openssl aes-128-cbc -d -in cipher.bin -out plain.txt -K 00112233445566778889aabbccddeeff -iv 0102030405060708;
+
+
+DES encryption
+
+ openssl enc -des-ecb -K e0e0e0e0f1f1f1f1 -in mesg.plain -out mesg.enc
+
+
+DES encryption
+
+ openssl des-ecb -d -K e0e0e0e0f1f1f1f1 -in mesg.plain -out mesg.enc
+
+
+
+
+prac4- 
+
+

prateek_res/freq_analysis.py

+import sys
+
+dict_char = {}
+
+with open(sys.argv[1], 'r') as f:
+	for line in f:
+		for c in line:
+			if c not in dict_char.keys():
+				dict_char[c] = 1
+			else:
+				dict_char[c] += 1
+
+
+l = sorted( dict_char.items(), key = lambda key_val : (key_val[1], key_val[0]) , reverse=True)
+for items in l:
+	print(str(items[0]) + '  '+str(items[1]))
+
+
+
+
+#print(dict_char)
+
+
+
+

prateek_res/lab5/doc1.txt

+Office Order
+
+Permission granted to Agent Z for procument of 100 desktop computers for the organization.
+
+- Gabbar

prateek_res/lab5/doc2.txt

+hello how are you whats up dude Z to enter high security area

prateek_res/lab5/strong.py

+import sys
+import hashlib as hashl
+f1 = open("doc1.txt", "r+", encoding = 'utf-8')
+f2 = open("doc2.txt", "r+", encoding = 'utf-8')
+L = str(f1.read())
+M = str(f2.read())
+Listofhashes = []
+for i in range(10):
+#hd1 = hashl.md5(L)
+    hd1 = hashl.md5(L.encode('utf-8'))
+    s = str(hd1.hexdigest())[:2]
+    Listofhashes.append(s)
+    L = L + " "
+d = 0
+print(Listofhashes)
+while True:
+    d+=1
+    hd2 = hashl.md5(M.encode('utf-8'))
+    z= str( hd2.hexdigest())[:2]
+    print(z)
+    if z in Listofhashes:
+        print(d)
+        break
+    M = M + " "
\ No newline at end of file

prateek_res/lab5/weak.py

+import sys
+import hashlib as hashl
+f1 = open("doc1.txt", "r+", encoding = 'utf-8')
+f2 = open("doc2.txt", "r+", encoding = 'utf-8')
+L = str(f1.read())
+M = str(f2.read())
+hd1 = hashl.md5(L.encode('utf-8'))
+hd2 = hashl.md5(M.encode('utf-8'))
+d = 0
+test =str(hd1.hexdigest())[:2]
+print(test)
+while True:
+    L = L + " " 
+    hd2 = hashl.md5(L.encode('utf-8'))
+    d+=1
+    Y =  str(hd2.hexdigest())[:2] 
+    if Y == test:
+        print(d)
+        break

prateek_res/opensslimp.txt

+      openssl command [ command_opts ] [ command_args ]
+
+       openssl [ list-standard-commands | list-message-digest-commands | list-
+       cipher-commands | list-cipher-algorithms | list-message-digest-
+       algorithms | list-public-key-algorithms]
+
+       openssl no-XXX [ arbitrary options ]
+
+       dgst      Message Digest Calculation.
+
+      dhparam   Generation and Management of Diffie-Hellman Parameters.
+                 Superseded by genpkey and pkeyparam
+
+       genpkey   Generation of Private Key or Parameters.
+
+      passwd    Generation of hashed passwords.
+
+       rand      Generate pseudo-random bytes.
+       x509      X.509 Certificate Data Management.
+
+   MESSAGE DIGEST COMMANDS
+       md2       MD2 Digest
+       md5       MD5 Digest
+       mdc2      MDC2 Digest
+       rmd160    RMD-160 Digest
+       sha       SHA Digest
+       sha1      SHA-1 Digest
+       sha224    SHA-224 Digest
+       sha256    SHA-256 Digest
+       sha384    SHA-384 Digest
+       sha512    SHA-512 Digest
+   ENCODING AND CIPHER COMMANDS
+       base64    Base64 Encoding
+       bf bf-cbc bf-cfb bf-ecb bf-ofb
+                 Blowfish Cipher
+       cast cast-cbc
+                 CAST Cipher
+
+       cast5-cbc cast5-cfb cast5-ecb cast5-ofb
+                 CAST5 Cipher
+
+       des des-cbc des-cfb des-ecb des-ede des-ede-cbc des-ede-cfb des-ede-ofb
+       des-ofb
+                 DES Cipher
+
+       des3 desx des-ede3 des-ede3-cbc des-ede3-cfb des-ede3-ofb
+                 Triple-DES Cipher
+
+       idea idea-cbc idea-cfb idea-ecb idea-ofb
+                 IDEA Cipher
+
+       rc2 rc2-cbc rc2-cfb rc2-ecb rc2-ofb
+                 RC2 Cipher
+
+       rc4       RC4 Cipher
+
+       rc5 rc5-cbc rc5-cfb rc5-ecb rc5-ofb
+                 RC5 Cipher