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dropbear/dropbearkey.c  view on Meta::CPAN

		fprintf(stderr, "Failed reading '%s'\n", filename);
		goto out;
	}

	key = new_sign_key();
	keytype = DROPBEAR_SIGNKEY_ANY;

	buf_setpos(buf, 0);
	ret = buf_get_priv_key(buf, key, &keytype);
	if (ret == DROPBEAR_FAILURE) {
		fprintf(stderr, "Bad key in '%s'\n", filename);
		goto out;
	}

	printpubkey(key, keytype);

	err = DROPBEAR_SUCCESS;

out:
	buf_burn_free(buf);
	buf = NULL;
	if (key) {
		sign_key_free(key);
		key = NULL;
	}
	return err;
}

static void printpubkey(sign_key * key, int keytype) {

	buffer * buf = NULL;
	unsigned char base64key[MAX_PUBKEY_SIZE*2];
	unsigned long base64len;
	int err;
	const char * typestring = NULL;
	char *fp = NULL;
	int len;
	struct passwd * pw = NULL;
	char * username = NULL;
	char hostname[100];

	buf = buf_new(MAX_PUBKEY_SIZE);
	buf_put_pub_key(buf, key, keytype);
	buf_setpos(buf, 4);

	len = buf->len - buf->pos;

	base64len = sizeof(base64key);
	err = base64_encode(buf_getptr(buf, len), len, base64key, &base64len);

	if (err != CRYPT_OK) {
		dropbear_exit("base64 failed");
	}

	typestring = signkey_name_from_type(keytype, NULL);

	fp = sign_key_fingerprint(buf_getptr(buf, len), len);

	/* a user@host comment is informative */
	username = "";
	pw = getpwuid(getuid());
	if (pw) {
		username = pw->pw_name;
	}

	gethostname(hostname, sizeof(hostname));
	hostname[sizeof(hostname)-1] = '\0';

	printf("Public key portion is:\n%s %s %s@%s\nFingerprint: %s\n",
			typestring, base64key, username, hostname, fp);

	m_free(fp);
	buf_free(buf);
}