cert_create: remove unneeded initializers

These variables store return values of functions.  Remove all of
meaningless initializers.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

tools/cert_create/src/cert.c

@@ -103,10 +103,10 @@ int cert_new(cert_t *cert, int days, int ca, STACK_OF(X509_EXTENSION) * sk)
 	cert_t *issuer_cert = &certs[cert->issuer];
 	EVP_PKEY *ikey = keys[issuer_cert->key].key;
 	X509 *issuer = issuer_cert->x;
-	X509 *x = NULL;
-	X509_EXTENSION *ex = NULL;
-	X509_NAME *name = NULL;
-	ASN1_INTEGER *sno = NULL;
+	X509 *x;
+	X509_EXTENSION *ex;
+	X509_NAME *name;
+	ASN1_INTEGER *sno;
 	int i, num;
 
 	/* Create the certificate structure */
@@ -202,7 +202,7 @@ int cert_init(void)
 
 cert_t *cert_get_by_opt(const char *opt)
 {
-	cert_t *cert = NULL;
+	cert_t *cert;
 	unsigned int i;
 
 	for (i = 0; i < num_certs; i++) {

tools/cert_create/src/ext.c

@@ -181,13 +181,13 @@ X509_EXTENSION *ext_new(int nid, int crit, unsigned char *data, int len)
 X509_EXTENSION *ext_new_hash(int nid, int crit, const EVP_MD *md,
 		unsigned char *buf, size_t len)
 {
-	X509_EXTENSION *ex = NULL;
-	ASN1_OCTET_STRING *octet = NULL;
-	HASH *hash = NULL;
-	ASN1_OBJECT *algorithm = NULL;
-	X509_ALGOR *x509_algor = NULL;
+	X509_EXTENSION *ex;
+	ASN1_OCTET_STRING *octet;
+	HASH *hash;
+	ASN1_OBJECT *algorithm;
+	X509_ALGOR *x509_algor;
 	unsigned char *p = NULL;
-	int sz = -1;
+	int sz;
 
 	/* OBJECT_IDENTIFIER with hash algorithm */
 	algorithm = OBJ_nid2obj(md->type);
@@ -254,10 +254,10 @@ X509_EXTENSION *ext_new_hash(int nid, int crit, const EVP_MD *md,
  */
 X509_EXTENSION *ext_new_nvcounter(int nid, int crit, int value)
 {
-	X509_EXTENSION *ex = NULL;
-	ASN1_INTEGER *counter = NULL;
+	X509_EXTENSION *ex;
+	ASN1_INTEGER *counter;
 	unsigned char *p = NULL;
-	int sz = -1;
+	int sz;
 
 	/* Encode counter */
 	counter = ASN1_INTEGER_new();
@@ -291,9 +291,9 @@ X509_EXTENSION *ext_new_nvcounter(int nid, int crit, int value)
  */
 X509_EXTENSION *ext_new_key(int nid, int crit, EVP_PKEY *k)
 {
-	X509_EXTENSION *ex = NULL;
-	unsigned char *p = NULL;
-	int sz = -1;
+	X509_EXTENSION *ex;
+	unsigned char *p;
+	int sz;
 
 	/* Encode key */
 	BIO *mem = BIO_new(BIO_s_mem());
@@ -315,7 +315,7 @@ X509_EXTENSION *ext_new_key(int nid, int crit, EVP_PKEY *k)
 
 ext_t *ext_get_by_opt(const char *opt)
 {
-	ext_t *ext = NULL;
+	ext_t *ext;
 	unsigned int i;
 
 	/* Sequential search. This is not a performance concern since the number

tools/cert_create/src/key.c

@@ -62,7 +62,7 @@ int key_new(key_t *key)
 
 static int key_create_rsa(key_t *key)
 {
-	RSA *rsa = NULL;
+	RSA *rsa;
 
 	rsa = RSA_generate_key(RSA_KEY_BITS, RSA_F4, NULL, NULL);
 	if (rsa == NULL) {
@@ -83,7 +83,7 @@ err:
 #ifndef OPENSSL_NO_EC
 static int key_create_ecdsa(key_t *key)
 {
-	EC_KEY *ec = NULL;
+	EC_KEY *ec;
 
 	ec = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
 	if (ec == NULL) {
@@ -132,8 +132,8 @@ int key_create(key_t *key, int type)
 
 int key_load(key_t *key, unsigned int *err_code)
 {
-	FILE *fp = NULL;
-	EVP_PKEY *k = NULL;
+	FILE *fp;
+	EVP_PKEY *k;
 
 	if (key->fn) {
 		/* Load key from file */
@@ -162,7 +162,7 @@ int key_load(key_t *key, unsigned int *err_code)
 
 int key_store(key_t *key)
 {
-	FILE *fp = NULL;
+	FILE *fp;
 
 	if (key->fn) {
 		fp = fopen(key->fn, "w");
@@ -185,7 +185,6 @@ int key_init(void)
 {
 	cmd_opt_t cmd_opt;
 	key_t *key;
-	int rc = 0;
 	unsigned int i;
 
 	for (i = 0; i < num_keys; i++) {
@@ -200,12 +199,12 @@ int key_init(void)
 		}
 	}
 
-	return rc;
+	return 0;
 }
 
 key_t *key_get_by_opt(const char *opt)
 {
-	key_t *key = NULL;
+	key_t *key;
 	unsigned int i;
 
 	/* Sequential search. This is not a performance concern since the number

tools/cert_create/src/main.c

@@ -134,7 +134,6 @@ static void print_help(const char *cmd, const struct option *long_opt)
 	printf("\t%s [OPTIONS]\n\n", cmd);
 
 	printf("Available options:\n");
-	i = 0;
 	opt = long_opt;
 	while (opt->name) {
 		p = line;
@@ -261,12 +260,12 @@ static const cmd_opt_t common_cmd_opt[] = {
 
 int main(int argc, char *argv[])
 {
-	STACK_OF(X509_EXTENSION) * sk = NULL;
-	X509_EXTENSION *cert_ext = NULL;
-	ext_t *ext = NULL;
-	key_t *key = NULL;
-	cert_t *cert = NULL;
-	FILE *file = NULL;
+	STACK_OF(X509_EXTENSION) * sk;
+	X509_EXTENSION *cert_ext;
+	ext_t *ext;
+	key_t *key;
+	cert_t *cert;
+	FILE *file;
 	int i, j, ext_nid, nvctr;
 	int c, opt_idx = 0;
 	const struct option *cmd_opt;