76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
#include "ntru_crypto.h"
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#include <fcntl.h>
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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 <time.h>
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#include <unistd.h>
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uint32_t get_rand(uint8_t *out, uint32_t num_bytes) {
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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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char *main(char *user_input) {
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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[638]; /* 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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uint16_t ciphertext_len; /* no. of octets in ciphertext */
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uint8_t plaintext[16]; /* size of AES-128 key */
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uint16_t plaintext_len; /* no. of octets in plaintext */
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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[638];
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char *buffer2 = 0;
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char *c = malloc(16);
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int r;
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int s;
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double cpu_time_used;
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rc = ntru_crypto_drbg_uninstantiate(drbg);
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FILE *f = fopen("keys/key-401.priv", "rb");
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r = fread(buffer, 1, 638, f);
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fclose(f);
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// printf("C Log DEC: %d bytes Private Key\n", r);
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// printf("C Log DEC: user_input Len %d\n", sizeof(user_input));
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rc = ntru_crypto_ntru_decrypt(r, buffer, 552, user_input, &plaintext_len,
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NULL);
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if (rc != NTRU_OK)
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printf("ERROR 1\n");
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rc = ntru_crypto_ntru_decrypt(r, buffer, 552, user_input, &plaintext_len,
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plaintext);
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if (rc != NTRU_OK)
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printf("ERROR 2\n");
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// printf("C Log DEC : your plain: %s\n", plaintext);
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// printf("C Log DEC : your plain LEN: %d\n", plaintext_len);
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// printf("your time spent: %lf\n", cpu_time_used);
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// snprintf(c, sizeof(c), "%s", plaintext);
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strcpy(c, plaintext);
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return c;
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error:
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printf("PROBLEM BUDDY %d\n", rc);
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exit(EXIT_FAILURE);
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return 0;
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}
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