From: couturie <couturie@extinction>
Date: Thu, 17 Aug 2017 18:24:52 +0000 (+0200)
Subject: new
X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/Cipher_code.git/commitdiff_plain/48c6cd00416c7d3db8b6f9dc052903f61e040691?hp=fda7e703f6e7ddec74c5c6eb2e44cdc393804bc3

new
---

diff --git a/OneRoundIoT/openssl/openssl_evp_ebc.c b/OneRoundIoT/openssl/openssl_evp_ebc.c
new file mode 100644
index 0000000..c7b2425
--- /dev/null
+++ b/OneRoundIoT/openssl/openssl_evp_ebc.c
@@ -0,0 +1,258 @@
+//gcc pixmap_io.c  -c
+//gcc openssl_evp_ebc.c pixmap_io.o -o openssl_evp_ebc -I /usr/include/openssl/ -lcrypto -O3 -std=c99 
+
+
+#include <openssl/conf.h>
+#include <openssl/evp.h>
+#include <openssl/err.h>
+#include <openssl/ssl.h>
+#include <openssl/bio.h>
+#include <string.h>
+#include <sys/time.h>
+#include "pixmap_io.h"
+
+typedef unsigned char   uchar;
+
+
+double TimeStart()
+{
+  struct timeval tstart;
+  gettimeofday(&tstart,0);
+  return( (double) (tstart.tv_sec + tstart.tv_usec*1e-6) );
+}
+
+double TimeStop(double t)
+{
+  struct timeval tend;
+
+  gettimeofday(&tend,0);
+  t = (double) (tend.tv_sec + tend.tv_usec*1e-6) - t;
+  return (t);
+}
+
+
+void handleErrors(void)
+{
+  ERR_print_errors_fp(stderr);
+  abort();
+}
+
+
+int encrypt(unsigned char *plaintext, int plaintext_len, unsigned char *key,
+  unsigned char *iv, unsigned char *ciphertext)
+{
+  EVP_CIPHER_CTX *ctx;
+
+  int len;
+
+  int ciphertext_len;
+
+  /* Create and initialise the context */
+  if(!(ctx = EVP_CIPHER_CTX_new())) handleErrors();
+
+  /* Initialise the encryption operation. IMPORTANT - ensure you use a key
+   * and IV size appropriate for your cipher
+   * In this example we are using 256 bit AES (i.e. a 256 bit key). The
+   * IV size for *most* modes is the same as the block size. For AES this
+   * is 128 bits */
+
+  //256
+  //avant ecb
+  if(1 != EVP_EncryptInit_ex(ctx, EVP_aes_128_ecb(), NULL, key, iv))
+    handleErrors();
+
+//  int cipherBlockSize = EVP_CIPHER_CTX_block_size(ctx);  
+//  printf("INFO(evp_encrypt): block size: %d\n", cipherBlockSize);
+
+  
+  /* Provide the message to be encrypted, and obtain the encrypted output.
+   * EVP_EncryptUpdate can be called multiple times if necessary
+   */
+
+  if(1 != EVP_EncryptUpdate(ctx, ciphertext, &len, plaintext, plaintext_len))
+    handleErrors();
+  ciphertext_len = len;
+
+  
+
+
+
+
+  
+  /* Finalise the encryption. Further ciphertext bytes may be written at
+   * this stage.
+   */
+  if(1 != EVP_EncryptFinal_ex(ctx, ciphertext + len, &len)) handleErrors();
+  ciphertext_len += len;
+
+  /* Clean up */
+  EVP_CIPHER_CTX_free(ctx);
+
+  return ciphertext_len;
+}
+
+int decrypt(unsigned char *ciphertext, int ciphertext_len, unsigned char *key,
+  unsigned char *iv, unsigned char *plaintext)
+{
+  EVP_CIPHER_CTX *ctx;
+
+  int len;
+
+  int plaintext_len;
+
+  /* Create and initialise the context */
+  if(!(ctx = EVP_CIPHER_CTX_new())) handleErrors();
+
+  /* Initialise the decryption operation. IMPORTANT - ensure you use a key
+   * and IV size appropriate for your cipher
+   * In this example we are using 256 bit AES (i.e. a 256 bit key). The
+   * IV size for *most* modes is the same as the block size. For AES this
+   * is 128 bits */
+
+  //256
+
+  //avant => ecb
+  if(1 != EVP_DecryptInit_ex(ctx, EVP_aes_128_ecb(), NULL, key, iv))
+    handleErrors();
+
+  /* Provide the message to be decrypted, and obtain the plaintext output.
+   * EVP_DecryptUpdate can be called multiple times if necessary
+   */
+  
+ 
+  if(1 != EVP_DecryptUpdate(ctx, plaintext, &len, ciphertext, ciphertext_len))
+    handleErrors();
+  plaintext_len = len;
+
+  /* Finalise the decryption. Further plaintext bytes may be written at
+   * this stage.
+   */
+  if(1 != EVP_DecryptFinal_ex(ctx, plaintext + len, &len)) handleErrors();
+  plaintext_len += len;
+
+  /* Clean up */
+  EVP_CIPHER_CTX_free(ctx);
+
+  return plaintext_len;
+}
+
+
+int main (void)
+{
+  /* Set up the key and iv. Do I need to say to not hard code these in a
+   * real application? :-)
+   */
+
+  /* A 256 bit key */
+//  unsigned char *key = (unsigned char *)"01234567890123456789012345678901";
+  unsigned char *key = (unsigned char *)"0123456789012345";
+  
+  /* A 128 bit IV */
+  unsigned char *iv = (unsigned char *)"0123456789012345";
+
+  /* Message to be encrypted */
+
+
+
+
+  
+  /* Buffer for ciphertext. Ensure the buffer is long enough for the
+   * ciphertext which may be longer than the plaintext, dependant on the
+   * algorithm and mode
+   */
+
+  int width;
+  int height;
+  uchar *data_R, *data_G, *data_B;
+//  load_RGB_pixmap("lena.ppm", &width, &height, &data_R, &data_G, &data_B);
+
+
+//  load_RGB_pixmap("No_ecb_mode_picture.ppm", &width, &height, &data_R, &data_G, &data_B);
+  load_RGB_pixmap("4096.ppm", &width, &height, &data_R, &data_G, &data_B);
+  int size=width*height*3;
+
+  int oneD=width*height;
+  uchar *plaintext = malloc(size);
+
+  
+  for(int i=0;i<oneD;i++) {
+    plaintext[i]=data_R[i];
+    plaintext[oneD+i]=data_G[i];
+    plaintext[2*oneD+i]=data_B[i];
+  }
+
+  
+
+  uchar *ciphertext = malloc(size);
+
+  /* Buffer for the decrypted text */
+  uchar *decryptedtext = malloc(size);
+
+  int decryptedtext_len, ciphertext_len;
+
+  /* Initialise the library */
+  ERR_load_crypto_strings();
+  OpenSSL_add_all_algorithms();
+  OPENSSL_config(NULL);
+
+  int ss=0;
+   double time=0;
+  double t=TimeStart();
+
+  
+  /* Encrypt the plaintext */
+
+
+  int i;
+
+  for(i=0;i<100;i++)
+  {  
+    ciphertext_len = encrypt (plaintext, size, key, iv,
+			      ciphertext);
+    ss+=ciphertext[100];
+  }
+
+ time+=TimeStop(t);
+
+ printf("Time encrypt %f   ss %d\n",time,ss);
+
+
+ for(int i=0;i<oneD;i++) {
+    data_R[i]=ciphertext[i];
+    data_G[i]=ciphertext[oneD+i];
+    data_B[i]=ciphertext[2*oneD+i];
+  }
+  store_RGB_pixmap("lena2.ppm", data_R, data_G, data_B, width, height);		   
+ 
+  
+  time=0;
+  t=0;
+  t=TimeStart();
+
+  for(int i=0;i<100;i++)
+  {  
+    /* Decrypt the ciphertext */
+    decryptedtext_len = decrypt(ciphertext, ciphertext_len, key, iv,
+				decryptedtext);
+  }
+
+ time+=TimeStop(t);
+
+ printf("Time decrypt %f\n",time);
+
+
+  for(int i=0;i<oneD;i++) {
+    data_R[i]=decryptedtext[i];
+    data_G[i]=decryptedtext[oneD+i];
+    data_B[i]=decryptedtext[2*oneD+i];
+  }
+  store_RGB_pixmap("lena3.ppm", data_R, data_G, data_B, width, height);		    
+
+  
+
+  /* Clean up */
+  EVP_cleanup();
+  ERR_free_strings();
+
+  return 0;
+}