Added week6

week6/commands5.txt

+---> Generate private key
+openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:2048 -out private-key2048.pem 
+
+---> Print info about private key
+openssl pkey -in private-key.pem -text
+
+---> Generate Public key
+openssl pkey -in private-key.pem -out public-key.pem -pubout
+
+---> Print public key info
+openssl pkey -in public-key.pem -pubin -text
+
+---> using genrsa
+openssl genrsa -out key.pem 1024
+
+openssl rsa -in key.pem -text -noout
+
+openssl rsa -in key.pem -pubout -out pub-key.pem
+
+to encrypt key
+openssl rsa -in key.pem -des3 -out enc-key.pem
+
+------ encrypt and decrypt using rsa
+
+openssl rsautl -encrypt -in <input_file> -inkey <llave> \
+        -out <output_file>  -pubin (if only public key file)
+        
+openssl rsautl -decrypt -in <input_file> -inkey <llave> \
+        -out <output_file>
+ 
\ No newline at end of file

week6/decoded_message.txt

+Hello world. Thi
\ No newline at end of file

week6/enc-key.pem

+-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: DES-EDE3-CBC,07582C3DBF330094
+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+-----END RSA PRIVATE KEY-----

week6/key.pem

+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

week6/message.txt

+Hello world. Thi
\ No newline at end of file

week6/message_decoded.txt

+Hello world. Thi
\ No newline at end of file

week6/message_enc.txt

+~/:Fqlt}{rf
]ΠQ
S6Jx=]U*r0&v'rhJzx?8lĮU-J4H9N	h[L̷ w=
\ No newline at end of file

week6/msg.txt

+hello world

week6/msg_dec.txt

+hello world

week6/msg_enc.txt

+70M
+p`F$VC)ۏu%yrgSH0A{Cަvq'փQZ	L)	MQ9:M-:*ݺ{i/309c#Oa
\ No newline at end of file

week6/passfile

+hello world

week6/private-key.pem_

+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----

week6/private-key2048.pem_

+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----

week6/programmingExercises/making faster/reference.txt

+Exercise 4
+encrypt -
+	- Read the symmmetric key from file (See fread(..))
+	- Encrypt the symmetric key using public key encryption and write it into a file named "C1" (You can use the public_encrypt(..) function of Exercise 2)
+	- Set the encryption key (See AES_set_encrypt_key())
+	- Generate random IV of 16 bytes (See RAND_bytes(..) ) and write it into a file named "IV"
+	- Encrypt the message using AES encryption (See AES_cfb128_encrypt(..)) 
+	- While encryption, take care that you encrypt the message in chunks of AES_BLOCK_SIZE and write it into a file named "C2"
+
+
+decrypt -
+	- Read the cipher C1 from file (See fread(..))
+	- Decrypt the C1 using private key decryption to get the symmetric key (You can use the private_decrypt(..) function of Exercise 2)
+	- Set the encryption key (See AES_set_encrypt_key())
+	- Read the IV from file (See fread(..))
+	- Decrypt the message using AES decryption (See AES_cfb128_encrypt(..) and you may use the parameter AES_DECRYPT for decryption) 
+	- While decryption, take care that you decrypt the cipher in chunks of AES_BLOCK_SIZE and write it into a file with name given in the parameter (char* decrypted_file)
+
+
+General Guidance - 
+	- While reading/writing a file take care that it may have special characters (like '\0', '\n' etc.) which may cause partial read/write. 
+	To avoid these you may use fread() and fwrite() to read/write all the bytes.
+	- Close all the files that you open

week6/programmingExercises/making faster/test_decrypt/Makefile

+testhybriddecrypt : hybrid_test_decrypt.c
+	gcc -o $@ hybrid_test_decrypt.c -L. -l_modelencrypt -lcrypto
+
+test :
+	./testhybriddecrypt message.txt private.pem public.pem symmetric_key.txt
\ No newline at end of file

week6/programmingExercises/making faster/test_decrypt/README

+1. Write your private_decrypt function in hybrid_test_decrypt.c file
+2. build executable using
+	make
+3. run test using
+	make test
+
+	if output is 1 then your code is correct else it is wrong.
+

week6/programmingExercises/making faster/test_decrypt/hybrid_test_decrypt.c

+#include <openssl/aes.h>
+#include <openssl/rand.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <openssl/pem.h>
+#include <openssl/ssl.h>
+#include <openssl/rsa.h>
+#include <openssl/evp.h>
+#include <openssl/bio.h>
+#include <openssl/err.h>
+#include "modelEncrypt.h"
+
+
+
+void hybrid_decrypt(char* private_key_file, char* decrypted_file) {
+/* your code goes here */
+
+ 
+}
+
+
+int main(int argc, char *argv[]) {
+
+	if(argc < 4){
+		printf("Usage : \narg1:message_file \narg2:private_key_file \narg3:public_key_file \narg4:symmetric_key\n");
+    	exit(1);
+    }
+
+    encrypt(argv[4],argv[1], argv[3]);
+    hybrid_decrypt(argv[2], "decrypted_message.txt");
+    
+    printf("output : %d\n",compare_files("message.txt","decrypted_message.txt"));
+	return 0;
+
+}

week6/programmingExercises/making faster/test_decrypt/message.txt

+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
\ No newline at end of file

week6/programmingExercises/making faster/test_decrypt/modelEncrypt.h

+#ifndef __HYBRIDENCRYPT_H__
+#define __HYBRIDENCRYPT_H__
+int compare_files(char*f1, char*f2);
+void encrypt(char * symmetric_key_file, char* message_file, char* public_key_file);
+#endif
\ No newline at end of file

week6/programmingExercises/making faster/test_decrypt/private.pem

+-----BEGIN RSA PRIVATE KEY-----
+MIIEpAIBAAKCAQEAunbfRz2Mfp/Bd3Wa2W6exB10RbQQ/CjdYCAfxCPaCRG0u9vZ
+7qncUZXguNrEYqcb4avXZp214C/PGya4zR81p9lDI6jf6Sm2DKd5mY5J9Gcw3c2c
+0fFee0Ggz6iVjcZfXXlmwUS8bQkMSBEGJ/CvOcBqHXEGN/ser1tAMxx7levsbj1B
+YbqdkZ5hcnRpBbS/bDU4VXiDozjTdM/7hrF74JklwqfUsCy85lQEyNOxTCfVeVrW
+eoKqLvQzFfj5OUiB7J5jCXpkupny2M8Q41da8VgyJtY/Vtz0nFnp5Orithqt1CFK
+2ngFaeNHB9DE2UCmevorYPub3Du0NZDZxhSskQIDAQABAoIBAQCT71mnsKo1j9Oz
+Tifjl8L4fxHPd1P+awFvkS0CtRr4FQcaAAwAMN1uEQXwQwiJ6GDTgz1q2XcBfYzH
+0snNW5R7LYD52rKCzyfzFDACZwQ/llsLrmRboC7AhUnrVqoIiDkC9R1T+o+vxfzr
+dC45I9gxbnoCD7jKUz5+C1x88H0QbHlCpJfIRURyM+O+U66opudutQSOOIyxTPdu
+6LE43UR5y8mUl1XER/qSs/Nt0QW8NBqFboz2qy9iglGXV6cJPU1ydD5ZW96yn6YM
+XNth1qAtWlreL0F6mGBm7bNW9VyQnHrYtPgtq/LK8TbN1inb23BiJprkzeOVeF9s
+m0UesmH9AoGBANqM0BroeJifVVUmp/jX9Oc1NhhKgtPCafGCGz0nZKikBxoaZx0t
+6Z71vFzPwA59Mcd+45faXosrUUs8iLa3TN/1B0tGY8B9cpMcsBvcHfhIuIqEycF5
+btpFtVT43XlaboJjZWfG+svhCW0k0EUJl8BFPgsEBSUroxwPl/XGqN1bAoGBANpq
+jEehKHjwIxPvthmhglbUrQ2fZPbwxFy/OEfTQJGZtoHrRwq1eSiXTR4sfHcqPBaq
+cqntpt2iyWH5izWeUPlgSoDHRv2URjn+61C2DfHgAYx2UneBJM5WRy4/f4lwqVJV
+4wARWMdBLITOuhgP4ExAo/2vPwZmzVdBi62CS+WDAoGBAMRJhjs0oeOJ7008G87+
+vwHNo9krStdAHIEBds91Cw3/zDUgk438h3/yewvstzUMMmJXz7e6NAHQlQH6y1s3
+xD69RqDQBpWC1h3UvUM4bl5pif03CDHRi8NUqmk330q38tr+xLvxVZ05b4rsbnYj
+CH1ycyfXo3tf9u4j/zqKA25TAoGADnQ4nlDi7cXufFZDtcSDbJ2caidfNhxO0lhx
+MAeh4UDL3CMmy2WhA/enSdTl07j+yv0yo14vycEJFKu/86drcmVV6NnHL+bNEu90
+wR2bJKOPVq1J3dC1D9aT1VKsbPsAqYs3f3ymZGFCwfMwS4FZdZJdh98+C31oH1se
+FDhoL2MCgYAd6lwkJHAH1tKMqDSnP6CYKMSfrNqJkOwZV4juArn3g5MzFjwTY024
+iHPamOpgg/2STsV9s50gwKtOdZHlxWvWI9nWxRF5/oXPNcguV8FJXGV18w+/Yse9
+Vd8YME3l+yTuAuNwQUFEpeuUOfmRdLQ8iEA51Z6cp0C/hm2nHAcsyw==
+-----END RSA PRIVATE KEY-----

week6/programmingExercises/making faster/test_decrypt/public.pem

+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAunbfRz2Mfp/Bd3Wa2W6e
+xB10RbQQ/CjdYCAfxCPaCRG0u9vZ7qncUZXguNrEYqcb4avXZp214C/PGya4zR81
+p9lDI6jf6Sm2DKd5mY5J9Gcw3c2c0fFee0Ggz6iVjcZfXXlmwUS8bQkMSBEGJ/Cv
+OcBqHXEGN/ser1tAMxx7levsbj1BYbqdkZ5hcnRpBbS/bDU4VXiDozjTdM/7hrF7
+4JklwqfUsCy85lQEyNOxTCfVeVrWeoKqLvQzFfj5OUiB7J5jCXpkupny2M8Q41da
+8VgyJtY/Vtz0nFnp5Orithqt1CFK2ngFaeNHB9DE2UCmevorYPub3Du0NZDZxhSs
+kQIDAQAB
+-----END PUBLIC KEY-----

week6/programmingExercises/making faster/test_decrypt/symmetric_key.txt

+aaaabbbbccccdddd
\ No newline at end of file

week6/programmingExercises/making faster/test_encrypt/Makefile

+testhybridencrypt : hybrid_test_encrypt.c
+	gcc -o $@ hybrid_test_encrypt.c -L. -l_modeldecrypt -lcrypto
+
+test :
+	./testhybridencrypt message.txt private.pem public.pem symmetric_key.txt

week6/programmingExercises/making faster/test_encrypt/README

+1. Write your encrypt function in hybrid_test_encrypt.c file
+2. build executable using
+	make
+3. run test using
+	make test
+
+	if output is 1 then your code is correct else it is wrong.
+

week6/programmingExercises/making faster/test_encrypt/hybrid_test_encrypt.c

+#include <openssl/aes.h>
+#include <openssl/rand.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <openssl/pem.h>
+#include <openssl/ssl.h>
+#include <openssl/rsa.h>
+#include <openssl/evp.h>
+#include <openssl/bio.h>
+#include <openssl/err.h>
+#include "modelDecrypt.h"
+
+int padding = RSA_PKCS1_OAEP_PADDING;
+
+RSA * createRSAWithFilename(char * filename,int public)
+{
+    FILE * fp = fopen(filename,"rb");
+ 
+    if(fp == NULL)
+    {
+        printf("Unable to open file %s \n",filename);
+        return NULL;    
+    }
+    RSA *rsa= RSA_new() ;
+ 
+    if(public)
+    {
+        rsa = PEM_read_RSA_PUBKEY(fp, &rsa,NULL, NULL);
+    }
+    else
+    {
+        rsa = PEM_read_RSAPrivateKey(fp, &rsa,NULL, NULL);
+    }
+ 
+    return rsa;
+}
+
+// int private_decrypt(unsigned char * enc_data,int data_len,char * fname, unsigned char *decrypted)
+// {
+//     int  result = 0;
+//     RSA *rsa = createRSAWithFilename(fname,1);
+//     result = RSA_public_decrypt(data_len,enc_data,decrypted,rsa,padding);
+// 	/* your code goes here */
+//     return result;
+// }
+
+void hybrid_encrypt(char * symmetric_key_file, char* message_file, char* public_key_file) {
+    puts("in hybrid file");
+    int  result = 0;
+    RSA *rsa = createRSAWithFilename(public_key_file,0);
+    char symmKey[2048]; 
+    char encKey[2048]; 
+    FILE *fp = fopen(symmetric_key_file, "r");
+    puts("reading file");
+    fseek(fp, 0, SEEK_END); 
+    size_t keyLen = ftell(fp); 
+    rewind(fp);
+    fread(symmKey, keyLen, 1, fp); 
+    puts(symmKey);
+    printf("%ld",keyLen);
+    puts("fread");
+    result = RSA_public_encrypt(keyLen,symmKey,encKey,rsa,padding);
+    puts("result");
+    puts(encKey);
+    puts("enckey");
+
+}
+
+int main(int argc, char *argv[]) {
+
+	if(argc < 4){
+		printf("Usage : \narg1:message_file \narg2:private_key_file \narg3:public_key_file \narg4:symmetric_key\n");
+    	exit(1);
+    }
+    puts("calling hybrid encyrpt");
+    hybrid_encrypt(argv[4],argv[1], argv[3]);
+    decrypt(argv[2], "decrypted_message.txt");
+    
+    printf("output : %d\n",compare_files("message.txt","decrypted_message.txt"));
+	return 0;
+
+}

week6/programmingExercises/making faster/test_encrypt/message.txt

+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
\ No newline at end of file

week6/programmingExercises/making faster/test_encrypt/modelDecrypt.h

+#ifndef __model_hybrid_decrypt_h__
+#define __model_hybrid_decrypt_h__
+
+int compare_files(char*f1, char*f2);
+void decrypt(char* private_key_file, char* decrypted_file);
+
+#endif
\ No newline at end of file

week6/programmingExercises/making faster/test_encrypt/private.pem

+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

week6/programmingExercises/making faster/test_encrypt/public.pem

+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAunbfRz2Mfp/Bd3Wa2W6e
+xB10RbQQ/CjdYCAfxCPaCRG0u9vZ7qncUZXguNrEYqcb4avXZp214C/PGya4zR81
+p9lDI6jf6Sm2DKd5mY5J9Gcw3c2c0fFee0Ggz6iVjcZfXXlmwUS8bQkMSBEGJ/Cv
+OcBqHXEGN/ser1tAMxx7levsbj1BYbqdkZ5hcnRpBbS/bDU4VXiDozjTdM/7hrF7
+4JklwqfUsCy85lQEyNOxTCfVeVrWeoKqLvQzFfj5OUiB7J5jCXpkupny2M8Q41da
+8VgyJtY/Vtz0nFnp5Orithqt1CFK2ngFaeNHB9DE2UCmevorYPub3Du0NZDZxhSs
+kQIDAQAB
+-----END PUBLIC KEY-----

week6/programmingExercises/making faster/test_encrypt/symmetric_key.txt

+aaaabbbbccccdddd
\ No newline at end of file

week6/programmingExercises/reference.txt

+Exercise 2
+
+public_encrypt -
+	- Read the RSA public key into RSA structure (see PEM_read_RSA_PUBKEY(..) for guidance)
+	- encrypt the message (see RSA_public_encrypt)
+	- Use RSA_PKCS1_OAEP_PADDING for padding 
+
+private_decrypt -
+	- Read the RSA private key into RSA structure (see PEM_read_RSAPrivateKey(..) for guidance)
+	- decrypt the message (see RSA_private_decrypt)
+	- Use RSA_PKCS1_OAEP_PADDING for padding 
+

week6/programmingExercises/test_decrypt/Makefile

+rsatestdecrypt : rsa_test_decrypt.c
+	gcc -o $@ rsa_test_decrypt.c -L. -l_modelrsaencrypt -lcrypto
+
+test :
+	./rsatestdecrypt message.txt private.pem public.pem
\ No newline at end of file

week6/programmingExercises/test_decrypt/message.txt

+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
\ No newline at end of file

week6/programmingExercises/test_decrypt/model_encrypt_rsa.h

+#ifndef __modelENCRYPTRSA_H__
+#define __modelENCRYPTRSA_H__
+
+void printLastError(char *msg);
+int compare_files(char*f1, char*f2);
+int public_encrypt(unsigned char * data,int data_len,char * fname, unsigned char *encrypted);
+
+#endif
\ No newline at end of file

week6/programmingExercises/test_decrypt/private.pem

+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

week6/programmingExercises/test_decrypt/public.pem

+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAunbfRz2Mfp/Bd3Wa2W6e
+xB10RbQQ/CjdYCAfxCPaCRG0u9vZ7qncUZXguNrEYqcb4avXZp214C/PGya4zR81
+p9lDI6jf6Sm2DKd5mY5J9Gcw3c2c0fFee0Ggz6iVjcZfXXlmwUS8bQkMSBEGJ/Cv
+OcBqHXEGN/ser1tAMxx7levsbj1BYbqdkZ5hcnRpBbS/bDU4VXiDozjTdM/7hrF7
+4JklwqfUsCy85lQEyNOxTCfVeVrWeoKqLvQzFfj5OUiB7J5jCXpkupny2M8Q41da
+8VgyJtY/Vtz0nFnp5Orithqt1CFK2ngFaeNHB9DE2UCmevorYPub3Du0NZDZxhSs
+kQIDAQAB
+-----END PUBLIC KEY-----

week6/programmingExercises/test_decrypt/rsa_test_decrypt.c

+#include <openssl/pem.h>
+#include <openssl/ssl.h>
+#include <openssl/rsa.h>
+#include <openssl/evp.h>
+#include <openssl/bio.h>
+#include <openssl/err.h>
+#include <stdio.h>
+#include <string.h>
+#include "model_encrypt_rsa.h"
+
+int padding = RSA_PKCS1_OAEP_PADDING;
+
+RSA * createRSAWithFilename(char * filename,int public)
+{
+    FILE * fp = fopen(filename,"rb");
+ 
+    if(fp == NULL)
+    {
+        printf("Unable to open file %s \n",filename);
+        return NULL;    
+    }
+    RSA *rsa= RSA_new() ;
+ 
+    if(public)
+    {
+        rsa = PEM_read_RSA_PUBKEY(fp, &rsa,NULL, NULL);
+    }
+    else
+    {
+        rsa = PEM_read_RSAPrivateKey(fp, &rsa,NULL, NULL);
+    }
+ 
+    return rsa;
+}
+
+int private_decrypt(unsigned char * enc_data,int data_len,char * fname, unsigned char *decrypted)
+{
+    int  result = 0;
+    RSA *rsa = createRSAWithFilename(fname,0);
+    result = RSA_public_decrypt(data_len,enc_data,decrypted,rsa,padding);
+	/* your code goes here */
+    return result;
+}
+
+int main(int argc, char *argv[]){
+
+
+    if(argc < 4){
+    	printf("Usage : arg1:message_file arg2:private_key_file arg3:public_key_file\n");
+    	exit(1);
+    }
+
+
+    char plainText[2048/8]; //key length : 2048
+
+    FILE *fp = fopen(argv[1], "r");
+    fseek(fp, 0, SEEK_END); 
+    size_t size = ftell(fp); 
+    rewind(fp);
+    fread(plainText, size, 1, fp); 
+
+        
+
+    unsigned char  encrypted[4098]={};
+    unsigned char decrypted[4098]={};
+
+
+    int encrypted_length= public_encrypt((unsigned char*) plainText,strlen(plainText),argv[3],encrypted);
+    if(encrypted_length == -1)
+    {
+        printLastError("Public Encrypt failed ");
+        exit(0);
+    }
+
+    int decrypted_length = private_decrypt(encrypted,encrypted_length,argv[2], decrypted);
+    if(decrypted_length == -1)
+    {
+        printLastError("Private Decrypt failed ");
+        exit(0);
+    }
+
+    FILE *file = fopen("decrypted_message.txt", "w");
+
+    int results = fputs((const char*) decrypted, file);
+    if (results == EOF) {
+        printf("Error in writing to file\n");
+        // Failed to write do error code here.
+    }
+    fclose(file);
+    
+    printf("output : %d\n",compare_files("message.txt","decrypted_message.txt"));
+
+}

week6/programmingExercises/test_encrypt/Makefile

+rsatestencrypt : rsa_test_encrypt.c
+	gcc -o $@ rsa_test_encrypt.c -L. -l_modelrsadecrypt -lcrypto
+
+test :
+	./rsatestencrypt message.txt private.pem public.pem
\ No newline at end of file

week6/programmingExercises/test_encrypt/decrypted_message.txt

+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
\ No newline at end of file

week6/programmingExercises/test_encrypt/message.txt

+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
\ No newline at end of file

week6/programmingExercises/test_encrypt/model_decrypt_rsa.h

+#ifndef __MODELDECRYPTRSA_H_
+#define _MODELDECRYPTRSA_H_
+
+void printLastError(char *msg);
+int compare_files(char*f1, char*f2);
+int private_decrypt(unsigned char * enc_data,int data_len,char * fname, unsigned char *decrypted);
+
+#endif
\ No newline at end of file

week6/programmingExercises/test_encrypt/private.pem

+-----BEGIN RSA PRIVATE KEY-----
+MIIEpAIBAAKCAQEAunbfRz2Mfp/Bd3Wa2W6exB10RbQQ/CjdYCAfxCPaCRG0u9vZ
+7qncUZXguNrEYqcb4avXZp214C/PGya4zR81p9lDI6jf6Sm2DKd5mY5J9Gcw3c2c
+0fFee0Ggz6iVjcZfXXlmwUS8bQkMSBEGJ/CvOcBqHXEGN/ser1tAMxx7levsbj1B
+YbqdkZ5hcnRpBbS/bDU4VXiDozjTdM/7hrF74JklwqfUsCy85lQEyNOxTCfVeVrW
+eoKqLvQzFfj5OUiB7J5jCXpkupny2M8Q41da8VgyJtY/Vtz0nFnp5Orithqt1CFK
+2ngFaeNHB9DE2UCmevorYPub3Du0NZDZxhSskQIDAQABAoIBAQCT71mnsKo1j9Oz
+Tifjl8L4fxHPd1P+awFvkS0CtRr4FQcaAAwAMN1uEQXwQwiJ6GDTgz1q2XcBfYzH
+0snNW5R7LYD52rKCzyfzFDACZwQ/llsLrmRboC7AhUnrVqoIiDkC9R1T+o+vxfzr
+dC45I9gxbnoCD7jKUz5+C1x88H0QbHlCpJfIRURyM+O+U66opudutQSOOIyxTPdu
+6LE43UR5y8mUl1XER/qSs/Nt0QW8NBqFboz2qy9iglGXV6cJPU1ydD5ZW96yn6YM
+XNth1qAtWlreL0F6mGBm7bNW9VyQnHrYtPgtq/LK8TbN1inb23BiJprkzeOVeF9s
+m0UesmH9AoGBANqM0BroeJifVVUmp/jX9Oc1NhhKgtPCafGCGz0nZKikBxoaZx0t
+6Z71vFzPwA59Mcd+45faXosrUUs8iLa3TN/1B0tGY8B9cpMcsBvcHfhIuIqEycF5
+btpFtVT43XlaboJjZWfG+svhCW0k0EUJl8BFPgsEBSUroxwPl/XGqN1bAoGBANpq
+jEehKHjwIxPvthmhglbUrQ2fZPbwxFy/OEfTQJGZtoHrRwq1eSiXTR4sfHcqPBaq
+cqntpt2iyWH5izWeUPlgSoDHRv2URjn+61C2DfHgAYx2UneBJM5WRy4/f4lwqVJV
+4wARWMdBLITOuhgP4ExAo/2vPwZmzVdBi62CS+WDAoGBAMRJhjs0oeOJ7008G87+
+vwHNo9krStdAHIEBds91Cw3/zDUgk438h3/yewvstzUMMmJXz7e6NAHQlQH6y1s3
+xD69RqDQBpWC1h3UvUM4bl5pif03CDHRi8NUqmk330q38tr+xLvxVZ05b4rsbnYj
+CH1ycyfXo3tf9u4j/zqKA25TAoGADnQ4nlDi7cXufFZDtcSDbJ2caidfNhxO0lhx
+MAeh4UDL3CMmy2WhA/enSdTl07j+yv0yo14vycEJFKu/86drcmVV6NnHL+bNEu90
+wR2bJKOPVq1J3dC1D9aT1VKsbPsAqYs3f3ymZGFCwfMwS4FZdZJdh98+C31oH1se
+FDhoL2MCgYAd6lwkJHAH1tKMqDSnP6CYKMSfrNqJkOwZV4juArn3g5MzFjwTY024
+iHPamOpgg/2STsV9s50gwKtOdZHlxWvWI9nWxRF5/oXPNcguV8FJXGV18w+/Yse9
+Vd8YME3l+yTuAuNwQUFEpeuUOfmRdLQ8iEA51Z6cp0C/hm2nHAcsyw==
+-----END RSA PRIVATE KEY-----

week6/programmingExercises/test_encrypt/public.pem

+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAunbfRz2Mfp/Bd3Wa2W6e
+xB10RbQQ/CjdYCAfxCPaCRG0u9vZ7qncUZXguNrEYqcb4avXZp214C/PGya4zR81
+p9lDI6jf6Sm2DKd5mY5J9Gcw3c2c0fFee0Ggz6iVjcZfXXlmwUS8bQkMSBEGJ/Cv
+OcBqHXEGN/ser1tAMxx7levsbj1BYbqdkZ5hcnRpBbS/bDU4VXiDozjTdM/7hrF7
+4JklwqfUsCy85lQEyNOxTCfVeVrWeoKqLvQzFfj5OUiB7J5jCXpkupny2M8Q41da
+8VgyJtY/Vtz0nFnp5Orithqt1CFK2ngFaeNHB9DE2UCmevorYPub3Du0NZDZxhSs
+kQIDAQAB
+-----END PUBLIC KEY-----

week6/programmingExercises/test_encrypt/rsa_test_encrypt.c

+#include <openssl/pem.h>
+#include <openssl/ssl.h>
+#include <openssl/rsa.h>
+#include <openssl/evp.h>
+#include <openssl/bio.h>
+#include <openssl/err.h>
+#include <stdio.h>
+#include<string.h>
+#include "model_decrypt_rsa.h"
+
+int padding = RSA_PKCS1_OAEP_PADDING;
+
+RSA * createRSAWithFilename(char * filename,int public)
+{
+    FILE * fp = fopen(filename,"rb");
+ 
+    if(fp == NULL)
+    {
+        printf("Unable to open file %s \n",filename);
+        return NULL;    
+    }
+    RSA *rsa= RSA_new() ;
+    if(public)
+    {
+        rsa = PEM_read_RSA_PUBKEY(fp, &rsa,NULL, NULL);
+    }
+    else
+    {
+        rsa = PEM_read_RSAPrivateKey(fp, &rsa,NULL, NULL);
+    }
+ 
+    return rsa;
+}
+
+int public_encrypt(unsigned char * data,int data_len,char * fname, unsigned char *encrypted)
+{
+    int result = 0;
+    RSA *rsa = createRSAWithFilename(fname,1);
+    result = RSA_public_encrypt(data_len,data,encrypted,rsa,padding);
+    return result;
+}
+int main(int argc, char *argv[]){
+
+
+    if(argc < 4){
+    	printf("Usage : arg1:message_file arg2:private_key_file arg3:public_key_file\n");
+    	exit(1);
+    }
+
+
+    char plainText[2048/8]; //key length : 2048
+
+    FILE *fp = fopen(argv[1], "r");
+    fseek(fp, 0, SEEK_END); 
+    size_t size = ftell(fp); 
+    rewind(fp);
+    fread(plainText, size, 1, fp); 
+
+        
+
+    unsigned char  encrypted[4098]={};
+    unsigned char decrypted[4098]={};
+
+
+    int encrypted_length= public_encrypt((unsigned char*) plainText,strlen(plainText),argv[3],encrypted);
+    if(encrypted_length == -1)
+    {
+        printLastError("Public Encrypt failed ");
+        exit(0);
+    }
+
+    int decrypted_length = private_decrypt(encrypted,encrypted_length,argv[2], decrypted);
+    if(decrypted_length == -1)
+    {
+        printLastError("Private Decrypt failed ");
+        exit(0);
+    }
+
+    FILE *file = fopen("decrypted_message.txt", "w");
+
+    int results = fputs((const char*) decrypted, file);
+    if (results == EOF) {
+        printf("Error in writing to file\n");
+        // Failed to write do error code here.
+    }
+    fclose(file);
+    
+    printf("output : %d ", compare_files("message.txt","decrypted_message.txt"));
+	return 0;
+
+}

week6/pub-key.pem

+-----BEGIN PUBLIC KEY-----
+MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDvDqoMOgIZ6q7Y+bG4AbTZOx8d
+bLIZhRrxCTmEnA3fhAA8of9DcoMoeDhqct9iBK2W0gmPnTRYqPzV9Zwt0GT1yirv
+oDbcbE+qzuwCQlH+DpfDry9KbYBUvIKQm5QMPTmfnK2N9zc8TTC7xZZ1BZOnkUW4
+qNduEpQVK5bm6An9uwIDAQAB
+-----END PUBLIC KEY-----

week6/public-key.pem

+-----BEGIN PUBLIC KEY-----
+MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCpKzVcchaIHvVAYK+TkA82Nhli
+wY4QbCfVyJ77nw/4U8wnN68QLuswujdjUl5KYBIS9f0a3wTaP8wdLMnQFseZSuYF
+P0ZGwBN0ftn4D+cbXKRYyXnn8Mm4qMrRPuh7BJbbtSi03RuND14urti+QcOsoU/7
+FwHl9Z5EgkN7AztGwwIDAQAB
+-----END PUBLIC KEY-----

week6/rsa.bin

+-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: AES-128-CBC,46A455A8E97BAFE41468DFC0029DD716
+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-----END RSA PRIVATE KEY-----

week6/speed.txt

+-->openssl speed
+1024 bits private rsa : 42517 in 9.92s 0.00023s
+1024 bits public rsa 856376 in 9.95s 0.000011s --slowest
+
+--> measured
+1024 bits rsa encrypt with script - 23 and 21 seconds (5000 times) 0.0044
+1024 bits rsa decrypt with script - 25 and 24.25 (5000 times) 0.005
+
+--->aes-128-cbc
+323406 in 3 seconds 0.00000927s
\ No newline at end of file

week6/speedTest.sh

+counter=1
+startTime=$(date +%s)
+while [ $counter -le 5000 ]
+do
+openssl rsautl -decrypt -in message_enc.txt -inkey key.pem -out message_decoded.txt
+((counter++))
+done
+endTime=$(date +%s)
+echo "Time taken : $(($endTime - $startTime))"
\ No newline at end of file