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- #include <stddef.h>
- #include <stdint.h>
- #include <stdio.h>
- #include <string.h>
-
- #include "api.h"
- #include "randombytes.h"
-
- #define MAXMLEN 2048
-
- static void printbytes(const uint8_t *x, size_t xlen) {
- size_t i;
- for (i = 0; i < xlen; i++) {
- printf("%02x", x[i]);
- }
- printf("\n");
- }
-
- // https://stackoverflow.com/a/1489985/1711232
- #define PASTER(x, y) x##_##y
- #define EVALUATOR(x, y) PASTER(x, y)
- #define NAMESPACE(fun) EVALUATOR(PQCLEAN_NAMESPACE, fun)
-
- #define CRYPTO_PUBLICKEYBYTES NAMESPACE(CRYPTO_PUBLICKEYBYTES)
- #define CRYPTO_SECRETKEYBYTES NAMESPACE(CRYPTO_SECRETKEYBYTES)
- #define CRYPTO_BYTES NAMESPACE(CRYPTO_BYTES)
-
- #define crypto_sign_keypair NAMESPACE(crypto_sign_keypair)
- #define crypto_sign NAMESPACE(crypto_sign)
- #define crypto_sign_open NAMESPACE(crypto_sign_open)
- #define crypto_sign_signature NAMESPACE(crypto_sign_signature)
- #define crypto_sign_verify NAMESPACE(crypto_sign_verify)
-
- int main(void) {
- uint8_t sk[CRYPTO_SECRETKEYBYTES];
- uint8_t pk[CRYPTO_PUBLICKEYBYTES];
-
- uint8_t mi[MAXMLEN];
- uint8_t sm[MAXMLEN + CRYPTO_BYTES];
- uint8_t sig[CRYPTO_BYTES];
-
- size_t smlen;
- size_t siglen;
- size_t mlen;
-
- int r;
- size_t i, k;
-
- /* i = 0, 1, 4, 16, 64, 256, 1024 */
- for (i = 0; i < MAXMLEN; i = (i == 0) ? i + 1 : i << 2) {
- randombytes(mi, i);
-
- crypto_sign_keypair(pk, sk);
-
- printbytes(pk, CRYPTO_PUBLICKEYBYTES);
- printbytes(sk, CRYPTO_SECRETKEYBYTES);
-
- crypto_sign(sm, &smlen, mi, i, sk);
- crypto_sign_signature(sig, &siglen, mi, i, sk);
-
- printbytes(sm, smlen);
- printbytes(sig, siglen);
-
- // By relying on m == sm we prevent having to allocate CRYPTO_BYTES
- // twice
- r = crypto_sign_open(sm, &mlen, sm, smlen, pk);
- r |= crypto_sign_verify(sig, siglen, mi, i, pk);
-
- if (r) {
- printf("ERROR: signature verification failed\n");
- return -1;
- }
- for (k = 0; k < i; k++) {
- if (sm[k] != mi[k]) {
- printf("ERROR: message recovery failed\n");
- return -1;
- }
- }
- }
- return 0;
- }
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