Constification of the data of a hash table. This means the callback

functions need to be constified, and therefore meant a number of easy
changes a little everywhere.

Now, if someone could explain to me why OBJ_dup() cheats...

12 files changed, 88 insertions, 83 deletions

diff --git a/crypto/asn1/a_object.c b/crypto/asn1/a_object.c
index 20caa2d3bd..71ce7c3896 100644
--- a/crypto/asn1/a_object.c
+++ b/crypto/asn1/a_object.c
@@ -302,7 +302,7 @@ void ASN1_OBJECT_free(ASN1_OBJECT *a)
 	}
 
 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
-	     char *sn, char *ln)
+	     const char *sn, const char *ln)
 	{
 	ASN1_OBJECT o;
 
diff --git a/crypto/asn1/asn1.h b/crypto/asn1/asn1.h
index a068035947..060395a9ec 100644
--- a/crypto/asn1/asn1.h
+++ b/crypto/asn1/asn1.h
@@ -758,7 +758,7 @@ int i2t_ASN1_OBJECT(char *buf,int buf_len,ASN1_OBJECT *a);
 
 int a2d_ASN1_OBJECT(unsigned char *out,int olen, const char *buf, int num);
 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data,int len,
-	char *sn, char *ln);
+	const char *sn, const char *ln);
 
 int ASN1_INTEGER_set(ASN1_INTEGER *a, long v);
 long ASN1_INTEGER_get(ASN1_INTEGER *a);
diff --git a/crypto/conf/conf_api.c b/crypto/conf/conf_api.c
index 8216e64525..bf84cecc1e 100644
--- a/crypto/conf/conf_api.c
+++ b/crypto/conf/conf_api.c
@@ -73,9 +73,9 @@ static void value_free_stack(CONF_VALUE *a,LHASH *conf);
 /* We don't use function pointer casting or wrapper functions - but cast each
  * callback parameter inside the callback functions. */
 /* static unsigned long hash(CONF_VALUE *v); */
-static unsigned long hash(void *v_void);
+static unsigned long hash(const void *v_void);
 /* static int cmp_conf(CONF_VALUE *a,CONF_VALUE *b); */
-static int cmp_conf(void *a_void,void *b_void);
+static int cmp_conf(const void *a_void,const void *b_void);
 
 /* Up until OpenSSL 0.9.5a, this was get_section */
 CONF_VALUE *_CONF_get_section(CONF *conf, char *section)
@@ -239,14 +239,14 @@ static void value_free_stack(CONF_VALUE *a, LHASH *conf)
 	}
 
 /* static unsigned long hash(CONF_VALUE *v) */
-static unsigned long hash(void *v_void)
+static unsigned long hash(const void *v_void)
 	{
 	CONF_VALUE *v = (CONF_VALUE *)v_void;
 	return((lh_strhash(v->section)<<2)^lh_strhash(v->name));
 	}
 
 /* static int cmp_conf(CONF_VALUE *a, CONF_VALUE *b) */
-static int cmp_conf(void *a_void, void *b_void)
+static int cmp_conf(const void *a_void,const  void *b_void)
 	{
 	int i;
 	CONF_VALUE *a = (CONF_VALUE *)a_void;
diff --git a/crypto/err/err.c b/crypto/err/err.c
index 48eed688a6..1f517cb5f4 100644
--- a/crypto/err/err.c
+++ b/crypto/err/err.c
@@ -124,13 +124,13 @@ static LHASH *error_hash=NULL;
 static LHASH *thread_hash=NULL;
 
 /* static unsigned long err_hash(ERR_STRING_DATA *a); */
-static unsigned long err_hash(void *a_void);
+static unsigned long err_hash(const void *a_void);
 /* static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b); */
-static int err_cmp(void *a_void, void *b_void);
+static int err_cmp(const void *a_void, const void *b_void);
 /* static unsigned long pid_hash(ERR_STATE *pid); */
-static unsigned long pid_hash(void *pid_void);
+static unsigned long pid_hash(const void *pid_void);
 /* static int pid_cmp(ERR_STATE *a,ERR_STATE *pid); */
-static int pid_cmp(void *a_void,void *pid_void);
+static int pid_cmp(const void *a_void,const void *pid_void);
 static unsigned long get_error_values(int inc,const char **file,int *line,
 				      const char **data,int *flags);
 
@@ -626,7 +626,7 @@ const char *ERR_reason_error_string(unsigned long e)
 	}
 
 /* static unsigned long err_hash(ERR_STRING_DATA *a) */
-static unsigned long err_hash(void *a_void)
+static unsigned long err_hash(const void *a_void)
 	{
 	unsigned long ret,l;
 
@@ -636,20 +636,20 @@ static unsigned long err_hash(void *a_void)
 	}
 
 /* static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b) */
-static int err_cmp(void *a_void, void *b_void)
+static int err_cmp(const void *a_void, const void *b_void)
 	{
 	return((int)(((ERR_STRING_DATA *)a_void)->error -
 			((ERR_STRING_DATA *)b_void)->error));
 	}
 
 /* static unsigned long pid_hash(ERR_STATE *a) */
-static unsigned long pid_hash(void *a_void)
+static unsigned long pid_hash(const void *a_void)
 	{
 	return(((ERR_STATE *)a_void)->pid*13);
 	}
 
 /* static int pid_cmp(ERR_STATE *a, ERR_STATE *b) */
-static int pid_cmp(void *a_void, void *b_void)
+static int pid_cmp(const void *a_void, const void *b_void)
 	{
 	return((int)((long)((ERR_STATE *)a_void)->pid -
 			(long)((ERR_STATE *)b_void)->pid));
diff --git a/crypto/lhash/lhash.c b/crypto/lhash/lhash.c
index 60699f45cc..874647af6b 100644
--- a/crypto/lhash/lhash.c
+++ b/crypto/lhash/lhash.c
@@ -109,7 +109,7 @@ const char *lh_version="lhash" OPENSSL_VERSION_PTEXT;
 
 static void expand(LHASH *lh);
 static void contract(LHASH *lh);
-static LHASH_NODE **getrn(LHASH *lh, void *data, unsigned long *rhash);
+static LHASH_NODE **getrn(LHASH *lh, const void *data, unsigned long *rhash);
 
 LHASH *lh_new(LHASH_HASH_FN_TYPE h, LHASH_COMP_FN_TYPE c)
 	{
@@ -176,11 +176,11 @@ void lh_free(LHASH *lh)
 	OPENSSL_free(lh);
 	}
 
-void *lh_insert(LHASH *lh, void *data)
+void *lh_insert(LHASH *lh, const void *data)
 	{
 	unsigned long hash;
 	LHASH_NODE *nn,**rn;
-	void *ret;
+	const void *ret;
 
 	lh->error=0;
 	if (lh->up_load <= (lh->num_items*LH_LOAD_MULT/lh->num_nodes))
@@ -211,14 +211,14 @@ void *lh_insert(LHASH *lh, void *data)
 		(*rn)->data=data;
 		lh->num_replace++;
 		}
-	return(ret);
+	return((void *)ret);
 	}
 
-void *lh_delete(LHASH *lh, void *data)
+void *lh_delete(LHASH *lh, const void *data)
 	{
 	unsigned long hash;
 	LHASH_NODE *nn,**rn;
-	void *ret;
+	const void *ret;
 
 	lh->error=0;
 	rn=getrn(lh,data,&hash);
@@ -242,14 +242,14 @@ void *lh_delete(LHASH *lh, void *data)
 		(lh->down_load >= (lh->num_items*LH_LOAD_MULT/lh->num_nodes)))
 		contract(lh);
 
-	return(ret);
+	return((void *)ret);
 	}
 
-void *lh_retrieve(LHASH *lh, void *data)
+void *lh_retrieve(LHASH *lh, const void *data)
 	{
 	unsigned long hash;
 	LHASH_NODE **rn;
-	void *ret;
+	const void *ret;
 
 	lh->error=0;
 	rn=getrn(lh,data,&hash);
@@ -264,7 +264,7 @@ void *lh_retrieve(LHASH *lh, void *data)
 		ret= (*rn)->data;
 		lh->num_retrieve++;
 		}
-	return(ret);
+	return((void *)ret);
 	}
 
 void lh_doall(LHASH *lh, LHASH_DOALL_FN_TYPE func)
@@ -279,7 +279,7 @@ void lh_doall(LHASH *lh, LHASH_DOALL_FN_TYPE func)
 	lh_doall_arg(lh, (LHASH_DOALL_ARG_FN_TYPE)func, NULL);
 	}
 
-void lh_doall_arg(LHASH *lh, LHASH_DOALL_ARG_FN_TYPE func, void *arg)
+void lh_doall_arg(LHASH *lh, LHASH_DOALL_ARG_FN_TYPE func, const void *arg)
 	{
 	int i;
 	LHASH_NODE *a,*n;
@@ -395,7 +395,7 @@ static void contract(LHASH *lh)
 		}
 	}
 
-static LHASH_NODE **getrn(LHASH *lh, void *data, unsigned long *rhash)
+static LHASH_NODE **getrn(LHASH *lh, const void *data, unsigned long *rhash)
 	{
 	LHASH_NODE **ret,*n1;
 	unsigned long hash,nn;
diff --git a/crypto/lhash/lhash.h b/crypto/lhash/lhash.h
index 6420512079..3c5355885f 100644
--- a/crypto/lhash/lhash.h
+++ b/crypto/lhash/lhash.h
@@ -77,17 +77,17 @@ extern "C" {
 
 typedef struct lhash_node_st
 	{
-	void *data;
+	const void *data;
 	struct lhash_node_st *next;
 #ifndef NO_HASH_COMP
 	unsigned long hash;
 #endif
 	} LHASH_NODE;
 
-typedef int (*LHASH_COMP_FN_TYPE)(void *, void *);
-typedef unsigned long (*LHASH_HASH_FN_TYPE)(void *);
-typedef void (*LHASH_DOALL_FN_TYPE)(void *);
-typedef void (*LHASH_DOALL_ARG_FN_TYPE)(void *, void *);
+typedef int (*LHASH_COMP_FN_TYPE)(const void *, const void *);
+typedef unsigned long (*LHASH_HASH_FN_TYPE)(const void *);
+typedef void (*LHASH_DOALL_FN_TYPE)(const void *);
+typedef void (*LHASH_DOALL_ARG_FN_TYPE)(const void *, const void *);
 
 /* Macros for declaring and implementing type-safe wrappers for LHASH callbacks.
  * This way, callbacks can be provided to LHASH structures without function
@@ -98,18 +98,18 @@ typedef void (*LHASH_DOALL_ARG_FN_TYPE)(void *, void *);
 
 /* First: "hash" functions */
 #define DECLARE_LHASH_HASH_FN(f_name,o_type) \
-	unsigned long f_name##_LHASH_HASH(void *);
+	unsigned long f_name##_LHASH_HASH(const void *);
 #define IMPLEMENT_LHASH_HASH_FN(f_name,o_type) \
-	unsigned long f_name##_LHASH_HASH(void *arg) { \
+	unsigned long f_name##_LHASH_HASH(const void *arg) { \
 		o_type a = (o_type)arg; \
 		return f_name(a); }
 #define LHASH_HASH_FN(f_name) f_name##_LHASH_HASH
 
 /* Second: "compare" functions */
 #define DECLARE_LHASH_COMP_FN(f_name,o_type) \
-	int f_name##_LHASH_COMP(void *, void *);
+	int f_name##_LHASH_COMP(const void *, const void *);
 #define IMPLEMENT_LHASH_COMP_FN(f_name,o_type) \
-	int f_name##_LHASH_COMP(void *arg1, void *arg2) { \
+	int f_name##_LHASH_COMP(const void *arg1, const void *arg2) { \
 		o_type a = (o_type)arg1; \
 		o_type b = (o_type)arg2; \
 		return f_name(a,b); }
@@ -153,11 +153,11 @@ typedef struct lhash_st
 
 LHASH *lh_new(LHASH_HASH_FN_TYPE h, LHASH_COMP_FN_TYPE c);
 void lh_free(LHASH *lh);
-void *lh_insert(LHASH *lh, void *data);
-void *lh_delete(LHASH *lh, void *data);
-void *lh_retrieve(LHASH *lh, void *data);
+void *lh_insert(LHASH *lh, const void *data);
+void *lh_delete(LHASH *lh, const void *data);
+void *lh_retrieve(LHASH *lh, const void *data);
 void lh_doall(LHASH *lh, LHASH_DOALL_FN_TYPE func);
-void lh_doall_arg(LHASH *lh, LHASH_DOALL_ARG_FN_TYPE func, void *arg);
+void lh_doall_arg(LHASH *lh, LHASH_DOALL_ARG_FN_TYPE func, const void *arg);
 unsigned long lh_strhash(const char *c);
 unsigned long lh_num_items(const LHASH *lh);
 
diff --git a/crypto/mem.c b/crypto/mem.c
index 3b5b2bbc68..4e4b894ab7 100644
--- a/crypto/mem.c
+++ b/crypto/mem.c
@@ -181,8 +181,8 @@ void *CRYPTO_malloc_locked(int num, const char *file, int line)
 		malloc_debug_func(NULL, num, file, line, 0);
 		}
 	ret = malloc_locked_func(num);
-#ifdef LEVITTE_DEBUG
-	fprintf(stderr, "LEVITTE_DEBUG:         > 0x%p (%d)\n", ret, num);
+#ifdef LEVITTE_DEBUG_MEM
+	fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);
 #endif
 	if (malloc_debug_func != NULL)
 		malloc_debug_func(ret, num, file, line, 1);
@@ -194,8 +194,8 @@ void CRYPTO_free_locked(void *str)
 	{
 	if (free_debug_func != NULL)
 		free_debug_func(str, 0);
-#ifdef LEVITTE_DEBUG
-	fprintf(stderr, "LEVITTE_DEBUG:         < 0x%p\n", str);
+#ifdef LEVITTE_DEBUG_MEM
+	fprintf(stderr, "LEVITTE_DEBUG_MEM:         < 0x%p\n", str);
 #endif
 	free_locked_func(str);
 	if (free_debug_func != NULL)
@@ -213,8 +213,8 @@ void *CRYPTO_malloc(int num, const char *file, int line)
 		malloc_debug_func(NULL, num, file, line, 0);
 		}
 	ret = malloc_func(num);
-#ifdef LEVITTE_DEBUG
-	fprintf(stderr, "LEVITTE_DEBUG:         > 0x%p (%d)\n", ret, num);
+#ifdef LEVITTE_DEBUG_MEM
+	fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);
 #endif
 	if (malloc_debug_func != NULL)
 		malloc_debug_func(ret, num, file, line, 1);
@@ -229,8 +229,8 @@ void *CRYPTO_realloc(void *str, int num, const char *file, int line)
 	if (realloc_debug_func != NULL)
 		realloc_debug_func(str, NULL, num, file, line, 0);
 	ret = realloc_func(str,num);
-#ifdef LEVITTE_DEBUG
-	fprintf(stderr, "LEVITTE_DEBUG:         | 0x%p -> 0x%p (%d)\n", str, ret, num);
+#ifdef LEVITTE_DEBUG_MEM
+	fprintf(stderr, "LEVITTE_DEBUG_MEM:         | 0x%p -> 0x%p (%d)\n", str, ret, num);
 #endif
 	if (realloc_debug_func != NULL)
 		realloc_debug_func(str, ret, num, file, line, 1);
@@ -242,8 +242,8 @@ void CRYPTO_free(void *str)
 	{
 	if (free_debug_func != NULL)
 		free_debug_func(str, 0);
-#ifdef LEVITTE_DEBUG
-	fprintf(stderr, "LEVITTE_DEBUG:         < 0x%p\n", str);
+#ifdef LEVITTE_DEBUG_MEM
+	fprintf(stderr, "LEVITTE_DEBUG_MEM:         < 0x%p\n", str);
 #endif
 	free_func(str);
 	if (free_debug_func != NULL)
diff --git a/crypto/mem_dbg.c b/crypto/mem_dbg.c
index 8e48e25fbd..9ed8184e45 100644
--- a/crypto/mem_dbg.c
+++ b/crypto/mem_dbg.c
@@ -220,34 +220,36 @@ long CRYPTO_dbg_get_options(void)
 	}
 
 /* static int mem_cmp(MEM *a, MEM *b) */
-static int mem_cmp(void *a_void, void *b_void)
+static int mem_cmp(const void *a_void, const void *b_void)
 	{
-	return((char *)((MEM *)a_void)->addr - (char *)((MEM *)b_void)->addr);
+	return((const char *)((MEM *)a_void)->addr
+		- (const char *)((MEM *)b_void)->addr);
 	}
 
 /* static unsigned long mem_hash(MEM *a) */
-static unsigned long mem_hash(void *a_void)
+static unsigned long mem_hash(const void *a_void)
 	{
 	unsigned long ret;
 
-	ret=(unsigned long)((MEM *)a_void)->addr;
+	ret=(unsigned long)((const MEM *)a_void)->addr;
 
 	ret=ret*17851+(ret>>14)*7+(ret>>4)*251;
 	return(ret);
 	}
 
 /* static int app_info_cmp(APP_INFO *a, APP_INFO *b) */
-static int app_info_cmp(void *a_void, void *b_void)
+static int app_info_cmp(const void *a_void, const void *b_void)
 	{
-	return(((APP_INFO *)a_void)->thread != ((APP_INFO *)b_void)->thread);
+	return(((const APP_INFO *)a_void)->thread
+		!= ((const APP_INFO *)b_void)->thread);
 	}
 
 /* static unsigned long app_info_hash(APP_INFO *a) */
-static unsigned long app_info_hash(void *a_void)
+static unsigned long app_info_hash(const void *a_void)
 	{
 	unsigned long ret;
 
-	ret=(unsigned long)((APP_INFO *)a_void)->thread;
+	ret=(unsigned long)((const APP_INFO *)a_void)->thread;
 
 	ret=ret*17851+(ret>>14)*7+(ret>>4)*251;
 	return(ret);
diff --git a/crypto/objects/o_names.c b/crypto/objects/o_names.c
index a5b1aacd66..367ee2bdef 100644
--- a/crypto/objects/o_names.c
+++ b/crypto/objects/o_names.c
@@ -29,9 +29,9 @@ static STACK_OF(NAME_FUNCS) *name_funcs_stack;
  * need for macro-generated wrapper functions. */
 
 /* static unsigned long obj_name_hash(OBJ_NAME *a); */
-static unsigned long obj_name_hash(void *a_void);
+static unsigned long obj_name_hash(const void *a_void);
 /* static int obj_name_cmp(OBJ_NAME *a,OBJ_NAME *b); */
-static int obj_name_cmp(void *a_void,void *b_void);
+static int obj_name_cmp(const void *a_void,const void *b_void);
 
 int OBJ_NAME_init(void)
 	{
@@ -88,7 +88,7 @@ int OBJ_NAME_new_index(unsigned long (*hash_func)(const char *),
 	}
 
 /* static int obj_name_cmp(OBJ_NAME *a, OBJ_NAME *b) */
-static int obj_name_cmp(void *a_void, void *b_void)
+static int obj_name_cmp(const void *a_void, const void *b_void)
 	{
 	int ret;
 	OBJ_NAME *a = (OBJ_NAME *)a_void;
@@ -110,7 +110,7 @@ static int obj_name_cmp(void *a_void, void *b_void)
 	}
 
 /* static unsigned long obj_name_hash(OBJ_NAME *a) */
-static unsigned long obj_name_hash(void *a_void)
+static unsigned long obj_name_hash(const void *a_void)
 	{
 	unsigned long ret;
 	OBJ_NAME *a = (OBJ_NAME *)a_void;
diff --git a/crypto/objects/obj_dat.c b/crypto/objects/obj_dat.c
index 0057da29bd..9d47c8fb8d 100644
--- a/crypto/objects/obj_dat.c
+++ b/crypto/objects/obj_dat.c
@@ -109,9 +109,9 @@ static int ln_cmp(const void *a, const void *b)
 	}
 
 /* static unsigned long add_hash(ADDED_OBJ *ca) */
-static unsigned long add_hash(void *ca_void)
+static unsigned long add_hash(const void *ca_void)
 	{
-	ASN1_OBJECT *a;
+	const ASN1_OBJECT *a;
 	int i;
 	unsigned long ret=0;
 	unsigned char *p;
@@ -145,7 +145,7 @@ static unsigned long add_hash(void *ca_void)
 	}
 
 /* static int add_cmp(ADDED_OBJ *ca, ADDED_OBJ *cb) */
-static int add_cmp(void *ca_void, void *cb_void)
+static int add_cmp(const void *ca_void, const void *cb_void)
 	{
 	ASN1_OBJECT *a,*b;
 	int i;
@@ -224,7 +224,7 @@ int OBJ_new_nid(int num)
 	return(i);
 	}
 
-int OBJ_add_object(ASN1_OBJECT *obj)
+int OBJ_add_object(const ASN1_OBJECT *obj)
 	{
 	ASN1_OBJECT *o;
 	ADDED_OBJ *ao[4]={NULL,NULL,NULL,NULL},*aop;
@@ -360,7 +360,7 @@ const char *OBJ_nid2ln(int n)
 		}
 	}
 
-int OBJ_obj2nid(ASN1_OBJECT *a)
+int OBJ_obj2nid(const ASN1_OBJECT *a)
 	{
 	ASN1_OBJECT **op;
 	ADDED_OBJ ad,*adp;
@@ -373,7 +373,7 @@ int OBJ_obj2nid(ASN1_OBJECT *a)
 	if (added != NULL)
 		{
 		ad.type=ADDED_DATA;
-		ad.obj=a;
+		ad.obj=(ASN1_OBJECT *)a; /* XXX: ugly but harmless */
 		adp=(ADDED_OBJ *)lh_retrieve(added,&ad);
 		if (adp != NULL) return (adp->obj->nid);
 		}
@@ -427,7 +427,7 @@ ASN1_OBJECT *OBJ_txt2obj(const char *s, int no_name)
 	return op;
 	}
 
-int OBJ_obj2txt(char *buf, int buf_len, ASN1_OBJECT *a, int no_name)
+int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name)
 {
 	int i,idx=0,n=0,len,nid;
 	unsigned long l;
@@ -493,7 +493,7 @@ int OBJ_obj2txt(char *buf, int buf_len, ASN1_OBJECT *a, int no_name)
 	return(n);
 }
 
-int OBJ_txt2nid(char *s)
+int OBJ_txt2nid(const char *s)
 {
 	ASN1_OBJECT *obj;
 	int nid;
@@ -552,10 +552,11 @@ static int obj_cmp(const void *ap, const void *bp)
 	return(memcmp(a->data,b->data,a->length));
         }
 
-char *OBJ_bsearch(char *key, char *base, int num, int size, int (*cmp)(const void *, const void *))
+const char *OBJ_bsearch(const char *key, const char *base, int num, int size,
+	int (*cmp)(const void *, const void *))
 	{
 	int l,h,i,c;
-	char *p;
+	const char *p;
 
 	if (num == 0) return(NULL);
 	l=0;
@@ -634,7 +635,7 @@ int OBJ_create_objects(BIO *in)
 	/* return(num); */
 	}
 
-int OBJ_create(char *oid, char *sn, char *ln)
+int OBJ_create(const char *oid, const char *sn, const char *ln)
 	{
 	int ok=0;
 	ASN1_OBJECT *op=NULL;
diff --git a/crypto/objects/obj_lib.c b/crypto/objects/obj_lib.c
index 0c71639eba..b0b0f2ff24 100644
--- a/crypto/objects/obj_lib.c
+++ b/crypto/objects/obj_lib.c
@@ -62,7 +62,7 @@
 #include <openssl/objects.h>
 #include <openssl/buffer.h>
 
-ASN1_OBJECT *OBJ_dup(ASN1_OBJECT *o)
+ASN1_OBJECT *OBJ_dup(const ASN1_OBJECT *o)
 	{
 	ASN1_OBJECT *r;
 	int i;
@@ -70,7 +70,8 @@ ASN1_OBJECT *OBJ_dup(ASN1_OBJECT *o)
 
 	if (o == NULL) return(NULL);
 	if (!(o->flags & ASN1_OBJECT_FLAG_DYNAMIC))
-		return(o);
+		return((ASN1_OBJECT *)o); /* XXX: ugh! Why? What kind of
+					     duplication is this??? */
 
 	r=ASN1_OBJECT_new();
 	if (r == NULL)
@@ -116,7 +117,7 @@ err:
 	return(NULL);
 	}
 
-int OBJ_cmp(ASN1_OBJECT *a, ASN1_OBJECT *b)
+int OBJ_cmp(const ASN1_OBJECT *a, const ASN1_OBJECT *b)
 	{
 	int ret;
 
diff --git a/crypto/objects/objects.h b/crypto/objects/objects.h
index 8918683aab..e98e92e993 100644
--- a/crypto/objects/objects.h
+++ b/crypto/objects/objects.h
@@ -997,24 +997,25 @@ void OBJ_NAME_do_all(int type,void (*fn)(const OBJ_NAME *,void *arg),
 void OBJ_NAME_do_all_sorted(int type,void (*fn)(const OBJ_NAME *,void *arg),
 			    void *arg);
 
-ASN1_OBJECT *	OBJ_dup(ASN1_OBJECT *o);
+ASN1_OBJECT *	OBJ_dup(const ASN1_OBJECT *o);
 ASN1_OBJECT *	OBJ_nid2obj(int n);
 const char *	OBJ_nid2ln(int n);
 const char *	OBJ_nid2sn(int n);
-int		OBJ_obj2nid(ASN1_OBJECT *o);
+int		OBJ_obj2nid(const ASN1_OBJECT *o);
 ASN1_OBJECT *	OBJ_txt2obj(const char *s, int no_name);
-int	OBJ_obj2txt(char *buf, int buf_len, ASN1_OBJECT *a, int no_name);
-int		OBJ_txt2nid(char *s);
+int	OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name);
+int		OBJ_txt2nid(const char *s);
 int		OBJ_ln2nid(const char *s);
 int		OBJ_sn2nid(const char *s);
-int		OBJ_cmp(ASN1_OBJECT *a,ASN1_OBJECT *b);
-char *		OBJ_bsearch(char *key,char *base,int num,int size,int (*cmp)(const void *, const void *));
+int		OBJ_cmp(const ASN1_OBJECT *a,const ASN1_OBJECT *b);
+const char *	OBJ_bsearch(const char *key,const char *base,int num,int size,
+	int (*cmp)(const void *, const void *));
 
 void		ERR_load_OBJ_strings(void );
 
 int		OBJ_new_nid(int num);
-int		OBJ_add_object(ASN1_OBJECT *obj);
-int		OBJ_create(char *oid,char *sn,char *ln);
+int		OBJ_add_object(const ASN1_OBJECT *obj);
+int		OBJ_create(const char *oid,const char *sn,const char *ln);
 void		OBJ_cleanup(void );
 int		OBJ_create_objects(BIO *in);