apps.c

openssl加密例子

	BUF_MEM_free(buf);
	EVP_PKEY_set1_RSA(pkey, rsa);
	return pkey;
error:
	BUF_MEM_free(buf);
	EVP_PKEY_free(pkey);
	return NULL;
}
#endif /* ndef OPENSSL_NO_RC4 */

STACK_OF(X509) *load_certs(BIO *err, const char *file, int format,
	const char *pass, ENGINE *e, const char *cert_descrip)
{
	BIO *certs;
	int i;
	STACK_OF(X509) *othercerts = NULL;
	STACK_OF(X509_INFO) *allcerts = NULL;
	X509_INFO *xi;
	PW_CB_DATA cb_data;

	cb_data.password = pass;
	cb_data.prompt_info = file;

	if((certs = BIO_new(BIO_s_file())) == NULL)
	{
		ERR_print_errors(err);
		goto end;
	}

	if (file == NULL)
		BIO_set_fp(certs,stdin,BIO_NOCLOSE);
	else
	{
		if (BIO_read_filename(certs,file) <= 0)
		{
			BIO_printf(err, "Error opening %s %s\n",
				cert_descrip, file);
			ERR_print_errors(err);
			goto end;
		}
	}

	if (format == FORMAT_PEM)
	{
		othercerts = sk_X509_new_null();
		if(!othercerts)
		{
			sk_X509_free(othercerts);
			othercerts = NULL;
			goto end;
		}
		allcerts = PEM_X509_INFO_read_bio(certs, NULL,
				(pem_password_cb *)password_callback, &cb_data);
		for(i = 0; i < sk_X509_INFO_num(allcerts); i++)
		{
			xi = sk_X509_INFO_value (allcerts, i);
			if (xi->x509)
			{
				sk_X509_push(othercerts, xi->x509);
				xi->x509 = NULL;
			}
		}
		goto end;
	}
	else {
		BIO_printf(err,"bad input format specified for %s\n",
			cert_descrip);
		goto end;
	}
end:
	if (othercerts == NULL)
	{
		BIO_printf(err,"unable to load certificates\n");
		ERR_print_errors(err);
	}
	if (allcerts) sk_X509_INFO_pop_free(allcerts, X509_INFO_free);
	if (certs != NULL) BIO_free(certs);
	return(othercerts);
}


#define X509V3_EXT_UNKNOWN_MASK		(0xfL << 16)
/* Return error for unknown extensions */
#define X509V3_EXT_DEFAULT		0
/* Print error for unknown extensions */
#define X509V3_EXT_ERROR_UNKNOWN	(1L << 16)
/* ASN1 parse unknown extensions */
#define X509V3_EXT_PARSE_UNKNOWN	(2L << 16)
/* BIO_dump unknown extensions */
#define X509V3_EXT_DUMP_UNKNOWN		(3L << 16)

#define X509_FLAG_CA (X509_FLAG_NO_ISSUER | X509_FLAG_NO_PUBKEY | \
			 X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION)

int set_cert_ex(unsigned long *flags, const char *arg)
{
	static const NAME_EX_TBL cert_tbl[] = {
		{ "compatible", X509_FLAG_COMPAT, 0xffffffffl},
		{ "ca_default", X509_FLAG_CA, 0xffffffffl},
		{ "no_header", X509_FLAG_NO_HEADER, 0},
		{ "no_version", X509_FLAG_NO_VERSION, 0},
		{ "no_serial", X509_FLAG_NO_SERIAL, 0},
		{ "no_signame", X509_FLAG_NO_SIGNAME, 0},
		{ "no_validity", X509_FLAG_NO_VALIDITY, 0},
		{ "no_subject", X509_FLAG_NO_SUBJECT, 0},
		{ "no_issuer", X509_FLAG_NO_ISSUER, 0},
		{ "no_pubkey", X509_FLAG_NO_PUBKEY, 0},
		{ "no_extensions", X509_FLAG_NO_EXTENSIONS, 0},
		{ "no_sigdump", X509_FLAG_NO_SIGDUMP, 0},
		{ "no_aux", X509_FLAG_NO_AUX, 0},
		{ "no_attributes", X509_FLAG_NO_ATTRIBUTES, 0},
		{ "ext_default", X509V3_EXT_DEFAULT, X509V3_EXT_UNKNOWN_MASK},
		{ "ext_error", X509V3_EXT_ERROR_UNKNOWN, X509V3_EXT_UNKNOWN_MASK},
		{ "ext_parse", X509V3_EXT_PARSE_UNKNOWN, X509V3_EXT_UNKNOWN_MASK},
		{ "ext_dump", X509V3_EXT_DUMP_UNKNOWN, X509V3_EXT_UNKNOWN_MASK},
		{ NULL, 0, 0}
	};
	return set_multi_opts(flags, arg, cert_tbl);
}

int set_name_ex(unsigned long *flags, const char *arg)
{
	static const NAME_EX_TBL ex_tbl[] = {
		{ "esc_2253", ASN1_STRFLGS_ESC_2253, 0},
		{ "esc_ctrl", ASN1_STRFLGS_ESC_CTRL, 0},
		{ "esc_msb", ASN1_STRFLGS_ESC_MSB, 0},
		{ "use_quote", ASN1_STRFLGS_ESC_QUOTE, 0},
		{ "utf8", ASN1_STRFLGS_UTF8_CONVERT, 0},
		{ "ignore_type", ASN1_STRFLGS_IGNORE_TYPE, 0},
		{ "show_type", ASN1_STRFLGS_SHOW_TYPE, 0},
		{ "dump_all", ASN1_STRFLGS_DUMP_ALL, 0},
		{ "dump_nostr", ASN1_STRFLGS_DUMP_UNKNOWN, 0},
		{ "dump_der", ASN1_STRFLGS_DUMP_DER, 0},
		{ "compat", XN_FLAG_COMPAT, 0xffffffffL},
		{ "sep_comma_plus", XN_FLAG_SEP_COMMA_PLUS, XN_FLAG_SEP_MASK},
		{ "sep_comma_plus_space", XN_FLAG_SEP_CPLUS_SPC, XN_FLAG_SEP_MASK},
		{ "sep_semi_plus_space", XN_FLAG_SEP_SPLUS_SPC, XN_FLAG_SEP_MASK},
		{ "sep_multiline", XN_FLAG_SEP_MULTILINE, XN_FLAG_SEP_MASK},
		{ "dn_rev", XN_FLAG_DN_REV, 0},
		{ "nofname", XN_FLAG_FN_NONE, XN_FLAG_FN_MASK},
		{ "sname", XN_FLAG_FN_SN, XN_FLAG_FN_MASK},
		{ "lname", XN_FLAG_FN_LN, XN_FLAG_FN_MASK},
		{ "align", XN_FLAG_FN_ALIGN, 0},
		{ "oid", XN_FLAG_FN_OID, XN_FLAG_FN_MASK},
		{ "space_eq", XN_FLAG_SPC_EQ, 0},
		{ "dump_unknown", XN_FLAG_DUMP_UNKNOWN_FIELDS, 0},
		{ "RFC2253", XN_FLAG_RFC2253, 0xffffffffL},
		{ "oneline", XN_FLAG_ONELINE, 0xffffffffL},
		{ "multiline", XN_FLAG_MULTILINE, 0xffffffffL},
		{ "ca_default", XN_FLAG_MULTILINE, 0xffffffffL},
		{ NULL, 0, 0}
	};
	return set_multi_opts(flags, arg, ex_tbl);
}

int set_ext_copy(int *copy_type, const char *arg)
{
	if (!strcasecmp(arg, "none"))
		*copy_type = EXT_COPY_NONE;
	else if (!strcasecmp(arg, "copy"))
		*copy_type = EXT_COPY_ADD;
	else if (!strcasecmp(arg, "copyall"))
		*copy_type = EXT_COPY_ALL;
	else
		return 0;
	return 1;
}

int copy_extensions(X509 *x, X509_REQ *req, int copy_type)
{
	STACK_OF(X509_EXTENSION) *exts = NULL;
	X509_EXTENSION *ext, *tmpext;
	ASN1_OBJECT *obj;
	int i, idx, ret = 0;
	if (!x || !req || (copy_type == EXT_COPY_NONE))
		return 1;
	exts = X509_REQ_get_extensions(req);

	for(i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
		ext = sk_X509_EXTENSION_value(exts, i);
		obj = X509_EXTENSION_get_object(ext);
		idx = X509_get_ext_by_OBJ(x, obj, -1);
		/* Does extension exist? */
		if (idx != -1) {
			/* If normal copy don't override existing extension */
			if (copy_type == EXT_COPY_ADD)
				continue;
			/* Delete all extensions of same type */
			do {
				tmpext = X509_get_ext(x, idx);
				X509_delete_ext(x, idx);
				X509_EXTENSION_free(tmpext);
				idx = X509_get_ext_by_OBJ(x, obj, -1);
			} while (idx != -1);
		}
		if (!X509_add_ext(x, ext, -1))
			goto end;
	}

	ret = 1;

	end:

	sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);

	return ret;
}
		
		
			

static int set_multi_opts(unsigned long *flags, const char *arg, const NAME_EX_TBL *in_tbl)
{
	STACK_OF(CONF_VALUE) *vals;
	CONF_VALUE *val;
	int i, ret = 1;
	if(!arg) return 0;
	vals = X509V3_parse_list(arg);
	for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
		val = sk_CONF_VALUE_value(vals, i);
		if (!set_table_opts(flags, val->name, in_tbl))
			ret = 0;
	}
	sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
	return ret;
}

static int set_table_opts(unsigned long *flags, const char *arg, const NAME_EX_TBL *in_tbl)
{
	char c;
	const NAME_EX_TBL *ptbl;
	c = arg[0];

	if(c == '-') {
		c = 0;
		arg++;
	} else if (c == '+') {
		c = 1;
		arg++;
	} else c = 1;

	for(ptbl = in_tbl; ptbl->name; ptbl++) {
		if(!strcasecmp(arg, ptbl->name)) {
			*flags &= ~ptbl->mask;
			if(c) *flags |= ptbl->flag;
			else *flags &= ~ptbl->flag;
			return 1;
		}
	}
	return 0;
}

void print_name(BIO *out, char *title, X509_NAME *nm, unsigned long lflags)
{
	char *buf;
	char mline = 0;
	int indent = 0;

	if(title) BIO_puts(out, title);
	if((lflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
		mline = 1;
		indent = 4;
	}
	if(lflags == XN_FLAG_COMPAT) {
		buf = X509_NAME_oneline(nm, 0, 0);
		BIO_puts(out, buf);
		BIO_puts(out, "\n");
		OPENSSL_free(buf);
	} else {
		if(mline) BIO_puts(out, "\n");
		X509_NAME_print_ex(out, nm, indent, lflags);
		BIO_puts(out, "\n");
	}
}

X509_STORE *setup_verify(BIO *bp, char *CAfile, char *CApath)
{
	X509_STORE *store;
	X509_LOOKUP *lookup;
	if(!(store = X509_STORE_new())) goto end;
	lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file());
	if (lookup == NULL) goto end;
	if (CAfile) {
		if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) {
			BIO_printf(bp, "Error loading file %s\n", CAfile);
			goto end;
		}
	} else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
		
	lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir());
	if (lookup == NULL) goto end;
	if (CApath) {
		if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) {
			BIO_printf(bp, "Error loading directory %s\n", CApath);
			goto end;
		}
	} else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);

	ERR_clear_error();
	return store;
	end:
	X509_STORE_free(store);
	return NULL;
}

#ifndef OPENSSL_NO_ENGINE
/* Try to load an engine in a shareable library */
static ENGINE *try_load_engine(BIO *err, const char *engine, int debug)
{
	ENGINE *e = ENGINE_by_id("dynamic");
	if (e)
	{
		if (!ENGINE_ctrl_cmd_string(e, "SO_PATH", engine, 0)
			|| !ENGINE_ctrl_cmd_string(e, "LOAD", NULL, 0))
		{
			ENGINE_free(e);
			e = NULL;
		}
	}
	return e;
}

ENGINE *setup_engine(BIO *err, const char *engine, int debug)
{
        ENGINE *e = NULL;

        if (engine)
        {
			if(strcmp(engine, "auto") == 0)
			{
				BIO_printf(err,"enabling auto ENGINE support\n");
				ENGINE_register_all_complete();
				return NULL;
			}
			if((e = ENGINE_by_id(engine)) == NULL
			&& (e = try_load_engine(err, engine, debug)) == NULL)
			{
				BIO_printf(err,"invalid engine \"%s\"\n", engine);
				ERR_print_errors(err);
				return NULL;
			}
			if (debug)
			{
				ENGINE_ctrl(e, ENGINE_CTRL_SET_LOGSTREAM,
					0, err, 0);
			}
            ENGINE_ctrl_cmd(e, "SET_USER_INTERFACE", 0, ui_method, 0, 1);
			if(!ENGINE_set_default(e, ENGINE_METHOD_ALL))
			{
				BIO_printf(err,"can't use that engine\n");
				ERR_print_errors(err);
				ENGINE_free(e);
				return NULL;
			}

			BIO_printf(err,"engine \"%s\" set.\n", ENGINE_get_id(e));

			/* Free our "structural" reference. */
			ENGINE_free(e);
		}
        return e;
}
#endif

int load_config(BIO *err, CONF *cnf)
{
	if (!cnf)
		cnf = config;
	if (!cnf)
		return 1;

	OPENSSL_load_builtin_modules();

	if (CONF_modules_load(cnf, NULL, 0) <= 0)
	{
		BIO_printf(err, "Error configuring OpenSSL\n");
		ERR_print_errors(err);
		return 0;
	}
	return 1;
}

char *make_config_name()
{
	const char *t=X509_get_default_cert_area();
	size_t len;
	char *p;

	len=strlen(t)+strlen(OPENSSL_CONF)+2;
	p=OPENSSL_malloc(len);
	BUF_strlcpy(p,t,len);
#ifndef OPENSSL_SYS_VMS
	BUF_strlcat(p,"/",len);
#endif
	BUF_strlcat(p,OPENSSL_CONF,len);

	return p;
}

static unsigned long index_serial_hash(const char **a)
{
	const char *n;

	n=a[DB_serial];
	while (*n == '0') n++;
	return(lh_strhash(n));
}

static int index_serial_cmp(const char **a, const char **b)
{
	const char *aa,*bb;

	for (aa=a[DB_serial]; *aa == '0'; aa++);
	for (bb=b[DB_serial]; *bb == '0'; bb++);
	return(strcmp(aa,bb));
}

static int index_name_qual(char **a)
	{ return(a[0][0] == 'V'); }

static unsigned long index_name_hash(const char **a)
{ return(lh_strhash(a[DB_name])); }

int index_name_cmp(const char **a, const char **b)
{ return(strcmp(a[DB_name],
	     b[DB_name])); 
}

static IMPLEMENT_LHASH_HASH_FN(index_serial_hash,const char **)
static IMPLEMENT_LHASH_COMP_FN(index_serial_cmp,const char **)
static IMPLEMENT_LHASH_HASH_FN(index_name_hash,const char **)
static IMPLEMENT_LHASH_COMP_FN(index_name_cmp,const char **)

#undef BSIZE
#define BSIZE 256

BIGNUM *load_serial(char *serialfile, int create, ASN1_INTEGER **retai)
{
	BIO *in=NULL;
	BIGNUM *ret=NULL;
	MS_STATIC char buf[1024];
	ASN1_INTEGER *ai=NULL;

	ai=ASN1_INTEGER_new();
	if (ai == NULL) goto err;

	if ((in=BIO_new(BIO_s_file())) == NULL)
	{
		ERR_print_errors(bio_err);
		goto err;
	}

	if (BIO_read_filename(in,serialfile) <= 0)
	{
		if (!create)
		{
			perror(serialfile);
			goto err;
		}
		else
		{
			ret=BN_new();
			if (ret == NULL || !rand_serial(ret, ai))
				BIO_printf(bio_err, "Out of memory\n");
		}
	}
	else
	{
		if (!a2i_ASN1_INTEGER(in,ai,buf,1024))
		{
			BIO_printf(bio_err,"unable to load number from %s\n",
				serialfile);
			goto err;
		}
		ret=ASN1_INTEGER_to_BN(ai,NULL);
		if (ret == NULL)
		{
			BIO_printf(bio_err,"error converting number from bin to BIGNUM\n");
			goto err;
		}
	}

	if (ret && retai)
	{
		*retai = ai;
		ai = NULL;
	}
 err:
	if (in != NULL) BIO_free(in);
	if (ai != NULL) ASN1_INTEGER_free(ai);
	return(ret);
}

int save_serial(char *serialfile, char *suffix, BIGNUM *serial, ASN1_INTEGER **retai)
{
	char buf[1][BSIZE];
	BIO *out = NULL;
	int ret=0;
	ASN1_INTEGER *ai=NULL;
	int j;

	if (suffix == NULL)
		j = strlen(serialfile);
	else
		j = strlen(serialfile) + strlen(suffix) + 1;
	if (j >= BSIZE)
	{
		BIO_printf(bio_err,"file name too long\n");
		goto err;