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legacy-code/deb2/ntru_nino/EES593/URG_encrypt.c

@@ -0,0 +1,94 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include "ntru_crypto.h"
+#include <time.h>
+
+uint32_t get_rand(uint8_t *out, uint32_t num_bytes)
+{
+	int rng = 50;
+	int urnd = open("/dev/random", O_RDONLY);
+	read(urnd, &rng, sizeof(int));
+	*out = urnd;
+	close(urnd);
+	return 0;
+}
+
+double main(char user_input[], char *i )
+{
+    	uint8_t public_key[821];          /* sized for EES401EP2 */
+    	uint16_t public_key_len;          /* no. of octets in public key */
+    	uint8_t private_key[891];         /* sized for EES401EP2 */
+    	uint16_t private_key_len;         /* no. of octets in private key */
+    	uint16_t expected_private_key_len;
+    	uint16_t expected_encoded_public_key_len;
+    	uint8_t encoded_public_key[855];  /* sized for EES401EP2 */
+    	uint16_t encoded_public_key_len;  /* no. of octets in encoded public key */
+    	uint8_t ciphertext[816];          /* sized fof EES401EP2 */
+    	uint16_t ciphertext_len;          /* no. of octets in ciphertext */
+    	uint8_t plainrtext[86];          /* sized fof EES401EP2 */
+    	uint16_t plaintext_len;          /* no. of octets in ciphertext */
+    	char *ret_str = ciphertext;
+    	uint8_t *next = NULL;             /* points to next cert field to parse */
+    	uint32_t next_len;                /* no. of octets it next */
+    	DRBG_HANDLE drbg;                 /* handle for instantiated DRBG */
+    	uint32_t rc;                      /* return code */
+    	bool error = FALSE;               /* records if error occurred */
+    	FILE *Handle=NULL;                /* File Handle for writing NTRU key to file */
+	char *filename[33];
+	char **ptr = filename;
+	char buffer[821];
+	char *c;
+	char *f_name = "/tmp/cipher_EES593_";
+	char *f_ext = ".dat";
+	char f_spec[strlen(f_name)+strlen(f_ext)+5];
+	int r;
+	double cpu_time_used;
+	clock_t time_s, time_e;
+
+	FILE *f = fopen("EES593/EES593-ntru-pub.raw", "rb");
+	r = fread(buffer, 1, 821, f);
+	fclose(f);
+
+	rc = ntru_crypto_drbg_external_instantiate(&get_rand, &drbg);
+	if (rc != DRBG_OK)
+    {
+        printf("Error 1");
+        goto error;
+    }
+
+	rc = ntru_crypto_ntru_encrypt(drbg, r, buffer, 16, user_input, &ciphertext_len,  NULL);
+	if (rc != DRBG_OK)
+    {
+        printf("Error 1");
+        goto error;
+    }
+
+	time_s = clock();
+	rc = ntru_crypto_ntru_encrypt(drbg, r, buffer, 16, user_input, &ciphertext_len,  ciphertext);
+	time_e = clock();
+	if (rc != DRBG_OK)
+    {
+        printf("Error 1");
+        goto error;
+    }
+	cpu_time_used = (float)(time_e - time_s) / CLOCKS_PER_SEC;
+	if (rc != DRBG_OK)
+    {
+        printf("Error 1");
+        goto error;
+    }
+	snprintf(f_spec, sizeof(f_spec), "%s%s%s", f_name, i, f_ext);
+    
+	Handle=fopen(f_spec, "wb");
+	fwrite(ciphertext, ciphertext_len, 1, Handle);
+	fclose(Handle);
+	return cpu_time_used;
+
+error: 
+	printf("ERROR %x\n", rc);
+	return 0;
+}
+