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tea-encrypt.c ora cicla tutta la stringa

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This commit is contained in:
Giulio De Pasquale 2017-05-25 16:59:28 +02:00
parent a6475f3500
commit 2bc3b17123
1 changed files with 5 additions and 4 deletions
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9
test/tea-encrypt.c
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@ -6,7 +6,7 @@
void encrypt(uint16_t *v) { void encrypt(uint16_t *v) {
uint16_t v0 = v[0], v1 = v[1], sum = 0, i; /* set up */ uint16_t v0 = v[0], v1 = v[1], sum = 0, i; /* set up */
uint16_t delta= 0x626f; uint16_t delta = 0x626f;
uint16_t k0 = 0x7065; // "pe" uint16_t k0 = 0x7065; // "pe"
uint16_t k1 = 0x7065; // "pe" uint16_t k1 = 0x7065; // "pe"
uint16_t k2 = 0x7275; // "ru" uint16_t k2 = 0x7275; // "ru"
@ -16,7 +16,7 @@ void encrypt(uint16_t *v) {
sum += delta; sum += delta;
v0 += ((v1 << 4) + k0) ^ (v1 + sum) ^ ((v1 >> 5) + k1); v0 += ((v1 << 4) + k0) ^ (v1 + sum) ^ ((v1 >> 5) + k1);
v1 += ((v0 << 4) + k2) ^ (v0 + sum) ^ ((v0 >> 5) + k3); v1 += ((v0 << 4) + k2) ^ (v0 + sum) ^ ((v0 >> 5) + k3);
printf("Intermediate v0: 0x%x | v1: 0x%x\n", v0, v1); //printf("Intermediate v0: 0x%x | v1: 0x%x\n", v0, v1);
} }
printf("SUM: 0x%x\n", sum); printf("SUM: 0x%x\n", sum);
printf("v0: 0x%x, v1: 0x%x\n", v0, v1); printf("v0: 0x%x, v1: 0x%x\n", v0, v1);
@ -27,7 +27,6 @@ void encrypt(uint16_t *v) {
int main(int argc, char *argv[]) { int main(int argc, char *argv[]) {
uint8_t *buf; uint8_t *buf;
uint32_t buflen, i; uint32_t buflen, i;
if (argc != 2) { if (argc != 2) {
printf("Usage: %s text_to_encrypt", argv[0]); printf("Usage: %s text_to_encrypt", argv[0]);
exit(1); exit(1);
@ -35,7 +34,9 @@ int main(int argc, char *argv[]) {
buflen = strlen(argv[1]); buflen = strlen(argv[1]);
buf = (uint8_t *)malloc(buflen); buf = (uint8_t *)malloc(buflen);
memcpy(buf, argv[1], buflen); memcpy(buf, argv[1], buflen);
encrypt((uint16_t *)buf); for (i = 0; i < buflen; i+=2) {
encrypt((uint16_t *)&buf[i]);
}
printf("Result:\n"); printf("Result:\n");
for (i = 0; i < buflen; i++) { for (i = 0; i < buflen; i++) {
printf("%02x", buf[i]); printf("%02x", buf[i]);