143 lines
3.9 KiB
C
143 lines
3.9 KiB
C
/*
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==============================================================================
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Name : XTStest.c
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Author : polfosol
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Version : 2.3.1.0
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Copyright : copyright © 2022 - polfosol
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Description : illustrating how to validate NIST's vectors for AES-XTS mode
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==============================================================================
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*/
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#include <stdio.h>
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#include "../micro_aes.h"
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#define TESTFILEPATH "XTSGenAES128.rsp"
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static void str2bytes(const char* str, uint8_t* bytes)
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#define char2num(c) (c > '9' ? (c & 7) + 9 : c & 0xF)
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{
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size_t i, j;
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for (i = 0, j = ~0; str[i]; ++i)
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{
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if (str[i] < '0' || str[i] > 'f') continue;
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if (j++ & 1) bytes[j / 2] = char2num(str[i]) << 4;
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else bytes[j / 2] |= char2num(str[i]);
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}
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}
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static void bytes2str(const uint8_t* bytes, char* str, size_t len)
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#define num2char(x) ((x) > 9 ? 'a' - 10 + (x) : '0' + (x))
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{
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size_t i, j;
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for (i = 0, j = 0; i < len; ++i)
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{
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str[j++] = num2char(bytes[i] >> 4);
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str[j++] = num2char(bytes[i] & 15);
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}
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str[j] = 0;
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}
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static int ciphertest(uint8_t* key, uint8_t* iv, uint8_t* p, uint8_t* c, size_t n, char* r)
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{
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char sk[4*AES_KEY_SIZE + 1], si[33], sp[0x80], sc[0x80], msg[30];
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uint8_t tmp[0x80], t = 0;
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sprintf(msg, "%s", "passed the test");
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AES_XTS_encrypt(key, iv, p, n, tmp);
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if (memcmp(c, tmp, n))
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{
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sprintf(msg, "%s", "encrypt failure");
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t = 1;
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}
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memset(tmp, 0xcc , sizeof tmp);
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AES_XTS_decrypt(key, iv, c, n, tmp);
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if (memcmp(p, tmp, n))
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{
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sprintf(msg, "%sdecrypt failure", t ? "encrypt & " : "");
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t |= 2;
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}
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bytes2str(key, sk, 2*AES_KEY_SIZE);
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bytes2str(iv, si, 16);
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bytes2str(p, sp, n);
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bytes2str(c, sc, n);
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sprintf(r, "%s\nK: %s\ni: %s\nP: %s\nC: %s", msg, sk, si, sp, sc);
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return t;
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}
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int main()
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{
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const char *linehdr[] = { "Key = ", "i = ", "PT = ", "CT = ", "DataUnitLen = " };
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char buffer[0x800], *value = "";
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size_t i, n = 0, pass = 0, df = 0, ef = 0, s = 0, sk = 0;
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uint8_t key[2*AES_KEY_SIZE], iv[16], p[0x80], c[0x80], ul[2];
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FILE *fp, *fs, *ferr;
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fp = fopen(TESTFILEPATH, "r");
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fs = fopen("passed.log", "w");
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ferr = fopen("failed.log", "w");
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if (fp == NULL)
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{
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printf("File not found: %s\n", TESTFILEPATH);
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return 1;
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}
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if (!fs || !ferr) return 1;
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while (fgets(buffer, sizeof buffer, fp) != NULL)
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{
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buffer[strcspn(buffer, "\n")] = 0;
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if (strlen(buffer) < 4) continue;
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for (i = 0; i < 5; i++)
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{
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if (strncmp(buffer, linehdr[i], strlen(linehdr[i])) == 0)
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{
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value = strrchr(buffer, ' ') + 1;
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break;
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}
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}
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switch (i)
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{
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case 0:
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sk = strlen(value) / 2;
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if (sk == 2 * AES_KEY_SIZE) str2bytes(value, key);
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break;
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case 1:
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str2bytes(value, iv);
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break;
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case 2:
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str2bytes(value, p);
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++n;
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break;
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case 3:
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str2bytes(value, c);
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++n;
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break;
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case 4:
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str2bytes(value, ul);
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break;
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}
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if (n == 2)
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{
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s = (ul[0] >> 4) *100 + (ul[0] & 15) *10 + (ul[1] >> 4);
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if (sk == 2 * AES_KEY_SIZE && s % 8 == 0)
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{
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n = ciphertest(key, iv, p, c, s / 8, buffer);
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fprintf(n ? ferr : fs, "%s\n", buffer); /* save the log */
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if (n == 0) ++pass;
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if (n & 1) ++ef;
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if (n & 2) ++df;
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}
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n = 0;
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}
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}
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printf ("test cases: %d\nsuccessful: %d\nfailed encrypt: %d, failed decrypt: %d\n",
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pass + (ef > df ? ef : df), pass, ef, df);
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fclose(fp); fclose(fs); fclose(ferr);
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if (ef + df == 0)
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{
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remove("passed.log"); remove("failed.log");
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}
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return 0;
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}
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