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#include "config.h"
#include <stdio.h>
#include <string.h>
/**
* crypto/sha256 - implementation of SHA-2 with 256 bit digest.
*
* This code is either a wrapper for openssl (if CCAN_CRYPTO_SHA256_USE_OPENSSL
* is defined) or an open-coded implementation based on Bitcoin's.
*
* License: BSD-MIT
* Maintainer: Rusty Russell <rusty@rustcorp.com.au>
*
* Example:
* #include <ccan/crypto/sha256/sha256.h>
* #include <err.h>
* #include <stdio.h>
* #include <string.h>
*
* // Simple demonstration: idential strings will have the same hash, but
* // two different strings will not.
* int main(int argc, char *argv[])
* {
* struct sha256 hash1, hash2;
*
* if (argc != 3)
* errx(1, "Usage: %s <string1> <string2>", argv[0]);
*
* sha256(&hash1, argv[1], strlen(argv[1]));
* sha256(&hash2, argv[2], strlen(argv[2]));
* printf("Hash is %s\n", memcmp(&hash1, &hash2, sizeof(hash1))
* ? "different" : "same");
* return 0;
* }
*/
int main(int argc, char *argv[])
{
/* Expect exactly one argument */
if (argc != 2)
return 1;
if (strcmp(argv[1], "depends") == 0) {
printf("ccan/endian\n");
return 0;
}
if (strcmp(argv[1], "libs") == 0) {
#ifdef CCAN_CRYPTO_SHA256_USE_OPENSSL
printf("crypto\n");
#endif
return 0;
}
return 1;
}
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