Constify SXNET_add_id_*

Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1300)

crypto/x509v3/v3_sxnet.c

@@ -101,7 +101,7 @@ static SXNET *sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 
 /* Add an id given the zone as an ASCII number */
 
-int SXNET_add_id_asc(SXNET **psx, char *zone, char *user, int userlen)
+int SXNET_add_id_asc(SXNET **psx, const char *zone, const char *user, int userlen)
 {
     ASN1_INTEGER *izone;
 
@@ -114,7 +114,7 @@ int SXNET_add_id_asc(SXNET **psx, char *zone, char *user, int userlen)
 
 /* Add an id given the zone as an unsigned long */
 
-int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, char *user,
+int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, const char *user,
                        int userlen)
 {
     ASN1_INTEGER *izone;
@@ -134,7 +134,7 @@ int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, char *user,
  * passed integer and doesn't make a copy so don't free it up afterwards.
  */
 
-int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, char *user,
+int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, const char *user,
                          int userlen)
 {
     SXNET *sx = NULL;
@@ -168,7 +168,7 @@ int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, char *user,
     if (userlen == -1)
         userlen = strlen(user);
 
-    if (!ASN1_OCTET_STRING_set(id->user, (unsigned char *)user, userlen))
+    if (!ASN1_OCTET_STRING_set(id->user, (const unsigned char *)user, userlen))
         goto err;
     if (!sk_SXNETID_push(sx->ids, id))
         goto err;
@@ -183,7 +183,7 @@ int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, char *user,
     return 0;
 }
 
-ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, char *zone)
+ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, const char *zone)
 {
     ASN1_INTEGER *izone;
     ASN1_OCTET_STRING *oct;

include/openssl/x509v3.h

@@ -449,13 +449,13 @@ DECLARE_ASN1_FUNCTIONS(BASIC_CONSTRAINTS)
 DECLARE_ASN1_FUNCTIONS(SXNET)
 DECLARE_ASN1_FUNCTIONS(SXNETID)
 
-int SXNET_add_id_asc(SXNET **psx, char *zone, char *user, int userlen);
-int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, char *user,
+int SXNET_add_id_asc(SXNET **psx, const char *zone, const char *user, int userlen);
+int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, const char *user,
                        int userlen);
-int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *izone, char *user,
+int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *izone, const char *user,
                          int userlen);
 
-ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, char *zone);
+ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, const char *zone);
 ASN1_OCTET_STRING *SXNET_get_id_ulong(SXNET *sx, unsigned long lzone);
 ASN1_OCTET_STRING *SXNET_get_id_INTEGER(SXNET *sx, ASN1_INTEGER *zone);