#include "all.h"#include "globalvars.h"void usage(){	fprintf(stderr, "masterkeycfg 1.0\n\n");	fprintf(stderr, "usage:\n");	fprintf(stderr, "\tmasterkeycfg command\n\n");	fprintf(stderr, "where command may be:\n");	fprintf(stderr, "\tcreate - generate random masterkey and place "									"it in shared memory\n");	fprintf(stderr, "\tclean  - clean master key from shared memory\n");	fprintf(stderr, "\tshow   - if master key is in shared memory - "									"display it in hex\n");	fprintf(stderr, "\tset mk - set masterkey from mk hex string\n\n");	fprintf(stderr, "Warning! Remember to turn off shell history when using 'set' command.\n");	fprintf(stderr, "Otherwise, masterkey will be saved in history file!\n");	fprintf(stderr, "In bash you can achieve that by issuing:\n");	fprintf(stderr, "\texport HISTSIZE=0\n");	return;}/* FIXME: maybe create CLI as in crypto*cfg, to prevent security *        problems with 'set' command. */intmain(argc, argv)	int argc;	char** argv;{	int i, ret, shm;	char* command;	char* mkText;	u_int8_t* mk;	if (argc < 2)	{		usage();		exit(1);	}	command = argv[1];		if (0 == strcmp(command, "show"))	{		ret = getAuthdata(0);		if (ret == -1)		{			perror("Shared memory error");			exit(1);		}		printf("masterkey:");		for (i = 0; i < 128/8; i++)		{			if (i == 128/8/2)				printf(" ");			printf(" %.2x", authdata[i]);		}		printf("\n");				shmdt(authdata);		if (ret == -1)		{			perror("shmdt");			exit(1);		}	}	else if (0 == strcmp(command, "clean"))	{		shm = getAuthdata(0);		if (shm == -1)		{			perror("Shared memory error");			exit(1);		}			/* clean sensitive data */		memset((void*) authdata, 0, 128/8);		ret = shmdt(authdata);		if (ret == -1)		{			perror("shmdt");			exit(1);		}		ret = shmctl(shm, IPC_RMID, NULL);		if (ret == -1)		{			perror("shmctl");			exit(1);		}	}	else if (0 == strcmp(command, "create"))	{		ret = getAuthdata(1);		if (ret == -1)		{			perror("Shared memory error");			exit(1);		}		/* Generate 128 bits of random data */		ret = RAND_bytes(authdata, 128/8);		if (ret == 0)		{			fprintf(stderr, "Rand_bytes: %lu\n", ERR_get_error());			shmdt(authdata);			if (ret == -1)			{				perror("shmdt");				exit(1);			}			ret = shmctl(shm, IPC_RMID, NULL);			if (ret == -1)			{				perror("shmctl");				exit(1);			}			exit(1);		}		shmdt(authdata);		if (ret == -1)		{			perror("shmdt");			exit(1);		}	}	else if (0 == strcmp(command, "set"))	{		if (argc < 3)		{			fprintf(stderr,							"Command 'set' requires hex string as argument.\n");			exit(1);		}		mkText = strdup(argv[2]);				cleanWhiteSpace(&mkText);		if (128/8*2 < strlen(mkText))		{			fprintf(stderr, "Key too long.\n");			free(mkText);			exit(1);		}		else if (128/8*2 > strlen(mkText))		{			fprintf(stderr, "Key too short.\n");			free(mkText);			exit(1);		}				ret = hex2byte(&mk, mkText, 128/8);		free(mkText);		if (ret == -1)		{			fprintf(stderr, "Key contains illegal characters.\n");			exit(1);		}				/* The key is good - we can copy it to shared memory */		ret = getAuthdata(1);		if (ret == -1)		{			perror("Shared memory error");			exit(1);		}		memcpy(authdata, mk, 128/8);		shmdt(authdata);		if (ret == -1)		{			perror("shmdt");			exit(1);		}	}	else	{		usage();		fprintf(stderr, "\nUnrecognized command: %s\n", command);		exit(1);	}		return 0;}