88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "ntru_crypto.h"
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#include <time.h>
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uint32_t get_rand(uint8_t *out, uint32_t num_bytes)
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{
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int rng = 50;
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int urnd = open("/dev/random", O_RDONLY);
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read(urnd, &rng, sizeof(int));
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*out = urnd;
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close(urnd);
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return 0;
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}
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double main(char *user_input, char *i )
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{
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uint8_t public_key[557]; /* sized for EES401EP2 */
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uint16_t public_key_len; /* no. of octets in public key */
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uint8_t private_key[607]; /* sized for EES401EP2 */
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uint16_t private_key_len; /* no. of octets in private key */
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uint16_t expected_private_key_len;
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uint16_t expected_encoded_public_key_len;
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uint8_t encoded_public_key[593]; /* sized for EES401EP2 */
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uint16_t encoded_public_key_len; /* no. of octets in encoded public key */
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uint8_t ciphertext[552]; /* sized fof EES401EP2 */
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char *ret_str = ciphertext;
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uint16_t ciphertext_len; /* no. of octets in ciphertext */
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uint8_t *next = NULL; /* points to next cert field to parse */
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uint32_t next_len; /* no. of octets it next */
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DRBG_HANDLE drbg; /* handle for instantiated DRBG */
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uint32_t rc; /* return code */
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bool error = FALSE; /* records if error occurred */
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FILE *Handle=NULL; /* File Handle for writing NTRU key to file */
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char *filename[33];
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char **ptr = filename;
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char buffer[557];
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char *c;
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char *f_name = "/tmp/cipher_EES401_";
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char *f_ext = ".dat";
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char *f_fin;
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char f_spec[strlen(f_name)+strlen(f_ext)+5];
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int r;
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double cpu_time_used;
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clock_t time_s, time_e;
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FILE *f = fopen("EES401/EES401-ntru-pub.raw", "r");
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r = fread(buffer, 1, 557, f);
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fclose(f);
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rc = ntru_crypto_drbg_external_instantiate(&get_rand, &drbg);
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if (rc != DRBG_OK)
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{
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printf("Error 1\n");
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goto error;
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}
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rc = ntru_crypto_ntru_encrypt(drbg, r, buffer, 32, user_input, &ciphertext_len, NULL);
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if (rc != DRBG_OK)
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{
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printf("Error 2\n");
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goto error;
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}
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time_s = clock();
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rc = ntru_crypto_ntru_encrypt(drbg, r, buffer, 32, user_input, &ciphertext_len, ciphertext);
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time_e = clock();
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cpu_time_used = (float)(time_e - time_s) / CLOCKS_PER_SEC;
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if (rc != DRBG_OK)
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{
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printf("Error 3\n");
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goto error;
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}
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snprintf(f_spec, sizeof(f_spec), "%s%s%s", f_name, i, f_ext);
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Handle=fopen(f_spec, "wb");
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fwrite(ciphertext, sizeof(ciphertext), 1, Handle);
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fclose(Handle);
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return cpu_time_used;
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error:
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printf("ERROR %x\n", rc);
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return 0;
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}
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