This is the second, larger part of the diff that was part of sthen's
i386 bulk and it had no fallout. It adds const like OpenSSL to most of
the public API exposed in asn1.h and needs some adjustments in internal
functions. I deliberately left BIO_f_asn1() for later.

Index: lib/libcrypto/asn1/a_bitstr.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/a_bitstr.c,v
retrieving revision 1.24
diff -u -p -r1.24 a_bitstr.c
--- lib/libcrypto/asn1/a_bitstr.c       29 Jan 2017 17:49:22 -0000      1.24
+++ lib/libcrypto/asn1/a_bitstr.c       25 Apr 2018 07:39:34 -0000
@@ -222,7 +222,7 @@ ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING 
 }
 
 int
-ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *a, int n)
+ASN1_BIT_STRING_get_bit(const ASN1_BIT_STRING *a, int n)
 {
        int w, v;
 
@@ -240,7 +240,8 @@ ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING 
  * 'len' is the length of 'flags'.
  */
 int
-ASN1_BIT_STRING_check(ASN1_BIT_STRING *a, unsigned char *flags, int flags_len)
+ASN1_BIT_STRING_check(const ASN1_BIT_STRING *a, const unsigned char *flags,
+    int flags_len)
 {
        int i, ok;
 
Index: lib/libcrypto/asn1/a_enum.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/a_enum.c,v
retrieving revision 1.18
diff -u -p -r1.18 a_enum.c
--- lib/libcrypto/asn1/a_enum.c 29 Jan 2017 17:49:22 -0000      1.18
+++ lib/libcrypto/asn1/a_enum.c 25 Apr 2018 07:39:34 -0000
@@ -104,7 +104,7 @@ ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, 
 }
 
 long
-ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
+ASN1_ENUMERATED_get(const ASN1_ENUMERATED *a)
 {
        int neg = 0, i;
        long r = 0;
@@ -134,7 +134,7 @@ ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
 }
 
 ASN1_ENUMERATED *
-BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
+BN_to_ASN1_ENUMERATED(const BIGNUM *bn, ASN1_ENUMERATED *ai)
 {
        ASN1_ENUMERATED *ret;
        int len, j;
@@ -177,7 +177,7 @@ err:
 }
 
 BIGNUM *
-ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn)
+ASN1_ENUMERATED_to_BN(const ASN1_ENUMERATED *ai, BIGNUM *bn)
 {
        BIGNUM *ret;
 
Index: lib/libcrypto/asn1/a_object.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/a_object.c,v
retrieving revision 1.30
diff -u -p -r1.30 a_object.c
--- lib/libcrypto/asn1/a_object.c       2 May 2017 03:59:44 -0000       1.30
+++ lib/libcrypto/asn1/a_object.c       25 Apr 2018 07:39:34 -0000
@@ -67,7 +67,7 @@
 #include <openssl/objects.h>
 
 int
-i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp)
+i2d_ASN1_OBJECT(const ASN1_OBJECT *a, unsigned char **pp)
 {
        unsigned char *p;
        int objsize;
@@ -213,13 +213,13 @@ err:
 }
 
 int
-i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a)
+i2t_ASN1_OBJECT(char *buf, int buf_len, const ASN1_OBJECT *a)
 {
        return OBJ_obj2txt(buf, buf_len, a, 0);
 }
 
 int
-i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
+i2a_ASN1_OBJECT(BIO *bp, const ASN1_OBJECT *a)
 {
        char *tmp = NULL;
        size_t tlen = 256;
Index: lib/libcrypto/asn1/a_strex.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/a_strex.c,v
retrieving revision 1.25
diff -u -p -r1.25 a_strex.c
--- lib/libcrypto/asn1/a_strex.c        7 Feb 2015 13:19:15 -0000       1.25
+++ lib/libcrypto/asn1/a_strex.c        25 Apr 2018 07:39:34 -0000
@@ -289,7 +289,7 @@ do_hex_dump(char_io *io_ch, void *arg, u
  */
 
 static int
-do_dump(unsigned long lflags, char_io *io_ch, void *arg, ASN1_STRING *str)
+do_dump(unsigned long lflags, char_io *io_ch, void *arg, const ASN1_STRING 
*str)
 {
        /* Placing the ASN1_STRING in a temp ASN1_TYPE allows
         * the DER encoding to readily obtained
@@ -346,7 +346,8 @@ static const signed char tag2nbyte[] = {
  */
 
 static int
-do_print_ex(char_io *io_ch, void *arg, unsigned long lflags, ASN1_STRING *str)
+do_print_ex(char_io *io_ch, void *arg, unsigned long lflags,
+    const ASN1_STRING *str)
 {
        int outlen, len;
        int type;
@@ -605,13 +606,13 @@ X509_NAME_print_ex_fp(FILE *fp, X509_NAM
 }
 
 int
-ASN1_STRING_print_ex(BIO *out, ASN1_STRING *str, unsigned long flags)
+ASN1_STRING_print_ex(BIO *out, const ASN1_STRING *str, unsigned long flags)
 {
        return do_print_ex(send_bio_chars, out, flags, str);
 }
 
 int
-ASN1_STRING_print_ex_fp(FILE *fp, ASN1_STRING *str, unsigned long flags)
+ASN1_STRING_print_ex_fp(FILE *fp, const ASN1_STRING *str, unsigned long flags)
 {
        return do_print_ex(send_fp_chars, fp, flags, str);
 }
Index: lib/libcrypto/asn1/a_time_tm.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/a_time_tm.c,v
retrieving revision 1.14
diff -u -p -r1.14 a_time_tm.c
--- lib/libcrypto/asn1/a_time_tm.c      28 Aug 2017 17:42:47 -0000      1.14
+++ lib/libcrypto/asn1/a_time_tm.c      25 Apr 2018 07:39:34 -0000
@@ -337,7 +337,7 @@ ASN1_TIME_adj(ASN1_TIME *s, time_t t, in
 }
 
 int
-ASN1_TIME_check(ASN1_TIME *t)
+ASN1_TIME_check(const ASN1_TIME *t)
 {
        if (t->type != V_ASN1_GENERALIZEDTIME && t->type != V_ASN1_UTCTIME)
                return (0);
@@ -345,7 +345,7 @@ ASN1_TIME_check(ASN1_TIME *t)
 }
 
 ASN1_GENERALIZEDTIME *
-ASN1_TIME_to_generalizedtime(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out)
+ASN1_TIME_to_generalizedtime(const ASN1_TIME *t, ASN1_GENERALIZEDTIME **out)
 {
        ASN1_GENERALIZEDTIME *tmp = NULL;
        struct tm tm;
@@ -386,7 +386,7 @@ ASN1_TIME_set_string(ASN1_TIME *s, const
  */
 
 int
-ASN1_UTCTIME_check(ASN1_UTCTIME *d)
+ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
 {
        if (d->type != V_ASN1_UTCTIME)
                return (0);
@@ -442,7 +442,7 @@ ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTI
  */
 
 int
-ASN1_GENERALIZEDTIME_check(ASN1_GENERALIZEDTIME *d)
+ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
 {
        if (d->type != V_ASN1_GENERALIZEDTIME)
                return (0);
Index: lib/libcrypto/asn1/a_type.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/a_type.c,v
retrieving revision 1.19
diff -u -p -r1.19 a_type.c
--- lib/libcrypto/asn1/a_type.c 4 May 2016 15:00:24 -0000       1.19
+++ lib/libcrypto/asn1/a_type.c 25 Apr 2018 07:39:34 -0000
@@ -62,7 +62,7 @@
 #include <openssl/objects.h>
 
 int
-ASN1_TYPE_get(ASN1_TYPE *a)
+ASN1_TYPE_get(const ASN1_TYPE *a)
 {
        if ((a->value.ptr != NULL) || (a->type == V_ASN1_NULL))
                return (a->type);
@@ -108,7 +108,7 @@ ASN1_TYPE_set1(ASN1_TYPE *a, int type, c
 
 /* Returns 0 if they are equal, != 0 otherwise. */
 int
-ASN1_TYPE_cmp(ASN1_TYPE *a, ASN1_TYPE *b)
+ASN1_TYPE_cmp(const ASN1_TYPE *a, const ASN1_TYPE *b)
 {
        int result = -1;
 
Index: lib/libcrypto/asn1/asn1.h
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/asn1.h,v
retrieving revision 1.45
diff -u -p -r1.45 asn1.h
--- lib/libcrypto/asn1/asn1.h   29 Mar 2018 02:29:24 -0000      1.45
+++ lib/libcrypto/asn1/asn1.h   25 Apr 2018 08:07:17 -0000
@@ -754,14 +754,14 @@ ASN1_TYPE *d2i_ASN1_TYPE(ASN1_TYPE **a, 
 int i2d_ASN1_TYPE(ASN1_TYPE *a, unsigned char **out);
 extern const ASN1_ITEM ASN1_ANY_it;
 
-int ASN1_TYPE_get(ASN1_TYPE *a);
+int ASN1_TYPE_get(const ASN1_TYPE *a);
 void ASN1_TYPE_set(ASN1_TYPE *a, int type, void *value);
 int ASN1_TYPE_set1(ASN1_TYPE *a, int type, const void *value);
-int ASN1_TYPE_cmp(ASN1_TYPE *a, ASN1_TYPE *b);
+int ASN1_TYPE_cmp(const ASN1_TYPE *a, const ASN1_TYPE *b);
 
 ASN1_OBJECT *ASN1_OBJECT_new(void );
 void ASN1_OBJECT_free(ASN1_OBJECT *a);
-int i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp);
+int i2d_ASN1_OBJECT(const ASN1_OBJECT *a, unsigned char **pp);
 ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
     long length);
 ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
@@ -783,7 +783,7 @@ int ASN1_STRING_set(ASN1_STRING *str, co
 void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len);
 int ASN1_STRING_length(const ASN1_STRING *x);
 void ASN1_STRING_length_set(ASN1_STRING *x, int n);
-int ASN1_STRING_type(ASN1_STRING *x);
+int ASN1_STRING_type(const ASN1_STRING *x);
 unsigned char *ASN1_STRING_data(ASN1_STRING *x);
 const unsigned char *ASN1_STRING_get0_data(const ASN1_STRING *x);
 
@@ -797,16 +797,16 @@ ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN
     const unsigned char **pp, long length);
 int ASN1_BIT_STRING_set(ASN1_BIT_STRING *a, unsigned char *d, int length );
 int ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING *a, int n, int value);
-int ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *a, int n);
-int ASN1_BIT_STRING_check(ASN1_BIT_STRING *a,
-    unsigned char *flags, int flags_len);
+int ASN1_BIT_STRING_get_bit(const ASN1_BIT_STRING *a, int n);
+int ASN1_BIT_STRING_check(const ASN1_BIT_STRING *a,
+    const unsigned char *flags, int flags_len);
 
 #ifndef OPENSSL_NO_BIO
 int ASN1_BIT_STRING_name_print(BIO *out, ASN1_BIT_STRING *bs,
     BIT_STRING_BITNAME *tbl, int indent);
 #endif
-int ASN1_BIT_STRING_num_asc(char *name, BIT_STRING_BITNAME *tbl);
-int ASN1_BIT_STRING_set_asc(ASN1_BIT_STRING *bs, char *name, int value,
+int ASN1_BIT_STRING_num_asc(const char *name, BIT_STRING_BITNAME *tbl);
+int ASN1_BIT_STRING_set_asc(ASN1_BIT_STRING *bs, const char *name, int value,
     BIT_STRING_BITNAME *tbl);
 
 int i2d_ASN1_BOOLEAN(int a, unsigned char **pp);
@@ -831,7 +831,7 @@ ASN1_ENUMERATED *d2i_ASN1_ENUMERATED(ASN
 int i2d_ASN1_ENUMERATED(ASN1_ENUMERATED *a, unsigned char **out);
 extern const ASN1_ITEM ASN1_ENUMERATED_it;
 
-int ASN1_UTCTIME_check(ASN1_UTCTIME *a);
+int ASN1_UTCTIME_check(const ASN1_UTCTIME *a);
 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t);
 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
     int offset_day, long offset_sec);
@@ -841,7 +841,7 @@ int ASN1_UTCTIME_set_string(ASN1_UTCTIME
 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t);
 #endif /* !LIBRESSL_INTERNAL */
 
-int ASN1_GENERALIZEDTIME_check(ASN1_GENERALIZEDTIME *a);
+int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *a);
 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
     time_t t);
 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
@@ -943,8 +943,8 @@ ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, t
 ASN1_TIME *ASN1_TIME_set_tm(ASN1_TIME *s, struct tm *tm);
 ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t, int offset_day,
     long offset_sec);
-int ASN1_TIME_check(ASN1_TIME *t);
-ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t,
+int ASN1_TIME_check(const ASN1_TIME *t);
+ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(const ASN1_TIME *t,
     ASN1_GENERALIZEDTIME **out);
 int ASN1_TIME_set_string(ASN1_TIME *s, const char *str);
 
@@ -955,15 +955,15 @@ STACK_OF(OPENSSL_BLOCK) *d2i_ASN1_SET(ST
     void (*free_func)(OPENSSL_BLOCK), int ex_tag, int ex_class);
 
 #ifndef OPENSSL_NO_BIO
-int i2a_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *a);
+int i2a_ASN1_INTEGER(BIO *bp, const ASN1_INTEGER *a);
 int a2i_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *bs, char *buf, int size);
-int i2a_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *a);
+int i2a_ASN1_ENUMERATED(BIO *bp, const ASN1_ENUMERATED *a);
 int a2i_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *bs, char *buf, int size);
-int i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a);
+int i2a_ASN1_OBJECT(BIO *bp, const ASN1_OBJECT *a);
 int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size);
-int i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type);
+int i2a_ASN1_STRING(BIO *bp, const ASN1_STRING *a, int type);
 #endif
-int i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a);
+int i2t_ASN1_OBJECT(char *buf, int buf_len, const 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,
@@ -975,9 +975,9 @@ ASN1_INTEGER *BN_to_ASN1_INTEGER(const B
 BIGNUM *ASN1_INTEGER_to_BN(const ASN1_INTEGER *ai, BIGNUM *bn);
 
 int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v);
-long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a);
-ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai);
-BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn);
+long ASN1_ENUMERATED_get(const ASN1_ENUMERATED *a);
+ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(const BIGNUM *bn, ASN1_ENUMERATED *ai);
+BIGNUM *ASN1_ENUMERATED_to_BN(const ASN1_ENUMERATED *ai, BIGNUM *bn);
 
 /* General */
 /* given a string, return the correct type, max is the maximum length */
@@ -1052,7 +1052,8 @@ int ASN1_i2d_fp(i2d_of_void *i2d, FILE *
                 CHECKED_PTR_OF(const type, x)))
 
 int ASN1_item_i2d_fp(const ASN1_ITEM *it, FILE *out, void *x);
-int ASN1_STRING_print_ex_fp(FILE *fp, ASN1_STRING *str, unsigned long flags);
+int ASN1_STRING_print_ex_fp(FILE *fp, const ASN1_STRING *str,
+    unsigned long flags);
 
 int ASN1_STRING_to_UTF8(unsigned char **out, ASN1_STRING *in);
 
@@ -1083,7 +1084,7 @@ int ASN1_UTCTIME_print(BIO *fp, const AS
 int ASN1_GENERALIZEDTIME_print(BIO *fp, const ASN1_GENERALIZEDTIME *a);
 int ASN1_TIME_print(BIO *fp, const ASN1_TIME *a);
 int ASN1_STRING_print(BIO *bp, const ASN1_STRING *v);
-int ASN1_STRING_print_ex(BIO *out, ASN1_STRING *str, unsigned long flags);
+int ASN1_STRING_print_ex(BIO *out, const ASN1_STRING *str, unsigned long 
flags);
 int ASN1_bn_print(BIO *bp, const char *number, const BIGNUM *num,
     unsigned char *buf, int off);
 int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent);
@@ -1102,18 +1103,19 @@ extern const ASN1_ITEM NETSCAPE_X509_it;
 int ASN1_UNIVERSALSTRING_to_string(ASN1_UNIVERSALSTRING *s);
 
 int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len);
-int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, int max_len);
+int ASN1_TYPE_get_octetstring(const ASN1_TYPE *a, unsigned char *data,
+    int max_len);
 int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,
     int len);
-int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data,
-    int max_len);
+int ASN1_TYPE_get_int_octetstring(const ASN1_TYPE *a, long *num,
+    unsigned char *data, int max_len);
 
 STACK_OF(OPENSSL_BLOCK) *ASN1_seq_unpack(const unsigned char *buf, int len,
     d2i_of_void *d2i, void (*free_func)(OPENSSL_BLOCK));
 unsigned char *ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d,
     unsigned char **buf, int *len );
 void *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i);
-void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it);
+void *ASN1_item_unpack(const ASN1_STRING *oct, const ASN1_ITEM *it);
 ASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d,
     ASN1_OCTET_STRING **oct);
 
@@ -1139,15 +1141,15 @@ void ASN1_STRING_TABLE_cleanup(void);
 /* Old API compatible functions */
 ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it);
 void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it);
-ASN1_VALUE * ASN1_item_d2i(ASN1_VALUE **val, const unsigned char **in,
+ASN1_VALUE *ASN1_item_d2i(ASN1_VALUE **val, const unsigned char **in,
     long len, const ASN1_ITEM *it);
 int ASN1_item_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it);
 int ASN1_item_ndef_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM 
*it);
 
 void ASN1_add_oid_module(void);
 
-ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf);
-ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf);
+ASN1_TYPE *ASN1_generate_nconf(const char *str, CONF *nconf);
+ASN1_TYPE *ASN1_generate_v3(const char *str, X509V3_CTX *cnf);
 
 /* ASN1 Print flags */
 
@@ -1174,15 +1176,15 @@ int ASN1_item_print(BIO *out, ASN1_VALUE
     const ASN1_ITEM *it, const ASN1_PCTX *pctx);
 ASN1_PCTX *ASN1_PCTX_new(void);
 void ASN1_PCTX_free(ASN1_PCTX *p);
-unsigned long ASN1_PCTX_get_flags(ASN1_PCTX *p);
+unsigned long ASN1_PCTX_get_flags(const ASN1_PCTX *p);
 void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags);
-unsigned long ASN1_PCTX_get_nm_flags(ASN1_PCTX *p);
+unsigned long ASN1_PCTX_get_nm_flags(const ASN1_PCTX *p);
 void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags);
-unsigned long ASN1_PCTX_get_cert_flags(ASN1_PCTX *p);
+unsigned long ASN1_PCTX_get_cert_flags(const ASN1_PCTX *p);
 void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags);
-unsigned long ASN1_PCTX_get_oid_flags(ASN1_PCTX *p);
+unsigned long ASN1_PCTX_get_oid_flags(const ASN1_PCTX *p);
 void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags);
-unsigned long ASN1_PCTX_get_str_flags(ASN1_PCTX *p);
+unsigned long ASN1_PCTX_get_str_flags(const ASN1_PCTX *p);
 void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags);
 
 BIO_METHOD *BIO_f_asn1(void);
Index: lib/libcrypto/asn1/asn1_gen.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/asn1_gen.c,v
retrieving revision 1.16
diff -u -p -r1.16 asn1_gen.c
--- lib/libcrypto/asn1/asn1_gen.c       29 Jan 2017 17:49:22 -0000      1.16
+++ lib/libcrypto/asn1/asn1_gen.c       25 Apr 2018 07:39:34 -0000
@@ -121,7 +121,7 @@ static ASN1_TYPE *asn1_str2type(const ch
 static int asn1_str2tag(const char *tagstr, int len);
 
 ASN1_TYPE *
-ASN1_generate_nconf(char *str, CONF *nconf)
+ASN1_generate_nconf(const char *str, CONF *nconf)
 {
        X509V3_CTX cnf;
 
@@ -133,7 +133,7 @@ ASN1_generate_nconf(char *str, CONF *nco
 }
 
 ASN1_TYPE *
-ASN1_generate_v3(char *str, X509V3_CTX *cnf)
+ASN1_generate_v3(const char *str, X509V3_CTX *cnf)
 {
        ASN1_TYPE *ret;
        tag_exp_arg asn1_tags;
Index: lib/libcrypto/asn1/asn1_lib.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/asn1_lib.c,v
retrieving revision 1.40
diff -u -p -r1.40 asn1_lib.c
--- lib/libcrypto/asn1/asn1_lib.c       14 Feb 2018 16:46:04 -0000      1.40
+++ lib/libcrypto/asn1/asn1_lib.c       25 Apr 2018 07:39:34 -0000
@@ -474,7 +474,7 @@ ASN1_STRING_length_set(ASN1_STRING *x, i
 }
 
 int
-ASN1_STRING_type(ASN1_STRING *x)
+ASN1_STRING_type(const ASN1_STRING *x)
 {
        return (x->type);
 }
Index: lib/libcrypto/asn1/asn_pack.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/asn_pack.c,v
retrieving revision 1.16
diff -u -p -r1.16 asn_pack.c
--- lib/libcrypto/asn1/asn_pack.c       29 Jan 2017 17:49:22 -0000      1.16
+++ lib/libcrypto/asn1/asn_pack.c       25 Apr 2018 07:39:34 -0000
@@ -203,7 +203,7 @@ err:
 /* Extract an ASN1 object from an ASN1_STRING */
 
 void *
-ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it)
+ASN1_item_unpack(const ASN1_STRING *oct, const ASN1_ITEM *it)
 {
        const unsigned char *p;
        void *ret;
Index: lib/libcrypto/asn1/evp_asn1.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/evp_asn1.c,v
retrieving revision 1.20
diff -u -p -r1.20 evp_asn1.c
--- lib/libcrypto/asn1/evp_asn1.c       28 Nov 2017 16:51:21 -0000      1.20
+++ lib/libcrypto/asn1/evp_asn1.c       25 Apr 2018 07:39:34 -0000
@@ -79,7 +79,7 @@ ASN1_TYPE_set_octetstring(ASN1_TYPE *a, 
 }
 
 int
-ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, int max_len)
+ASN1_TYPE_get_octetstring(const ASN1_TYPE *a, unsigned char *data, int max_len)
 {
        int ret, num;
        unsigned char *p;
@@ -162,7 +162,7 @@ ASN1_TYPE_set_int_octetstring(ASN1_TYPE 
 }
 
 int
-ASN1_TYPE_get_int_octetstring(ASN1_TYPE *at, long *num, unsigned char *data,
+ASN1_TYPE_get_int_octetstring(const ASN1_TYPE *at, long *num, unsigned char 
*data,
     int max_len)
 {
        ASN1_STRING *sp = at->value.sequence;
Index: lib/libcrypto/asn1/f_enum.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/f_enum.c,v
retrieving revision 1.15
diff -u -p -r1.15 f_enum.c
--- lib/libcrypto/asn1/f_enum.c 29 Jan 2017 17:49:22 -0000      1.15
+++ lib/libcrypto/asn1/f_enum.c 25 Apr 2018 07:39:34 -0000
@@ -65,7 +65,7 @@
 /* Based on a_int.c: equivalent ENUMERATED functions */
 
 int
-i2a_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *a)
+i2a_ASN1_ENUMERATED(BIO *bp, const ASN1_ENUMERATED *a)
 {
        int i, n = 0;
        static const char h[] = "0123456789ABCDEF";
Index: lib/libcrypto/asn1/f_int.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/f_int.c,v
retrieving revision 1.18
diff -u -p -r1.18 f_int.c
--- lib/libcrypto/asn1/f_int.c  29 Jan 2017 17:49:22 -0000      1.18
+++ lib/libcrypto/asn1/f_int.c  25 Apr 2018 07:39:34 -0000
@@ -63,7 +63,7 @@
 #include <openssl/err.h>
 
 int
-i2a_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *a)
+i2a_ASN1_INTEGER(BIO *bp, const ASN1_INTEGER *a)
 {
        int i, n = 0;
        static const char h[] = "0123456789ABCDEF";
Index: lib/libcrypto/asn1/f_string.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/f_string.c,v
retrieving revision 1.17
diff -u -p -r1.17 f_string.c
--- lib/libcrypto/asn1/f_string.c       29 Jan 2017 17:49:22 -0000      1.17
+++ lib/libcrypto/asn1/f_string.c       25 Apr 2018 07:39:34 -0000
@@ -63,7 +63,7 @@
 #include <openssl/err.h>
 
 int
-i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type)
+i2a_ASN1_STRING(BIO *bp, const ASN1_STRING *a, int type)
 {
        int i, n = 0;
        static const char h[] = "0123456789ABCDEF";
Index: lib/libcrypto/asn1/t_bitst.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/t_bitst.c,v
retrieving revision 1.7
diff -u -p -r1.7 t_bitst.c
--- lib/libcrypto/asn1/t_bitst.c        11 Jul 2014 08:44:47 -0000      1.7
+++ lib/libcrypto/asn1/t_bitst.c        25 Apr 2018 07:39:34 -0000
@@ -83,7 +83,7 @@ ASN1_BIT_STRING_name_print(BIO *out, ASN
 }
 
 int
-ASN1_BIT_STRING_set_asc(ASN1_BIT_STRING *bs, char *name, int value,
+ASN1_BIT_STRING_set_asc(ASN1_BIT_STRING *bs, const char *name, int value,
     BIT_STRING_BITNAME *tbl)
 {
        int bitnum;
@@ -99,7 +99,7 @@ ASN1_BIT_STRING_set_asc(ASN1_BIT_STRING 
 }
 
 int
-ASN1_BIT_STRING_num_asc(char *name, BIT_STRING_BITNAME *tbl)
+ASN1_BIT_STRING_num_asc(const char *name, BIT_STRING_BITNAME *tbl)
 {
        BIT_STRING_BITNAME *bnam;
 
Index: lib/libcrypto/asn1/tasn_prn.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/asn1/tasn_prn.c,v
retrieving revision 1.16
diff -u -p -r1.16 tasn_prn.c
--- lib/libcrypto/asn1/tasn_prn.c       29 Jan 2017 17:49:22 -0000      1.16
+++ lib/libcrypto/asn1/tasn_prn.c       25 Apr 2018 07:39:34 -0000
@@ -105,7 +105,7 @@ ASN1_PCTX_free(ASN1_PCTX *p)
 }
 
 unsigned long
-ASN1_PCTX_get_flags(ASN1_PCTX *p)
+ASN1_PCTX_get_flags(const ASN1_PCTX *p)
 {
        return p->flags;
 }
@@ -117,7 +117,7 @@ ASN1_PCTX_set_flags(ASN1_PCTX *p, unsign
 }
 
 unsigned long
-ASN1_PCTX_get_nm_flags(ASN1_PCTX *p)
+ASN1_PCTX_get_nm_flags(const ASN1_PCTX *p)
 {
        return p->nm_flags;
 }
@@ -129,7 +129,7 @@ ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, uns
 }
 
 unsigned long
-ASN1_PCTX_get_cert_flags(ASN1_PCTX *p)
+ASN1_PCTX_get_cert_flags(const ASN1_PCTX *p)
 {
        return p->cert_flags;
 }
@@ -141,7 +141,7 @@ ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, u
 }
 
 unsigned long
-ASN1_PCTX_get_oid_flags(ASN1_PCTX *p)
+ASN1_PCTX_get_oid_flags(const ASN1_PCTX *p)
 {
        return p->oid_flags;
 }
@@ -153,7 +153,7 @@ ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, un
 }
 
 unsigned long
-ASN1_PCTX_get_str_flags(ASN1_PCTX *p)
+ASN1_PCTX_get_str_flags(const ASN1_PCTX *p)
 {
        return p->str_flags;
 }
Index: lib/libcrypto/x509v3/v3_sxnet.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/x509v3/v3_sxnet.c,v
retrieving revision 1.19
diff -u -p -r1.19 v3_sxnet.c
--- lib/libcrypto/x509v3/v3_sxnet.c     29 Jan 2017 17:49:23 -0000      1.19
+++ lib/libcrypto/x509v3/v3_sxnet.c     25 Apr 2018 07:39:34 -0000
@@ -335,7 +335,7 @@ err:
 }
 
 ASN1_OCTET_STRING *
-SXNET_get_id_asc(SXNET *sx, char *zone)
+SXNET_get_id_asc(SXNET *sx, const char *zone)
 {
        ASN1_INTEGER *izone = NULL;
        ASN1_OCTET_STRING *oct;
Index: lib/libcrypto/x509v3/v3_utl.c
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/x509v3/v3_utl.c,v
retrieving revision 1.27
diff -u -p -r1.27 v3_utl.c
--- lib/libcrypto/x509v3/v3_utl.c       20 Mar 2018 16:16:59 -0000      1.27
+++ lib/libcrypto/x509v3/v3_utl.c       25 Apr 2018 07:39:34 -0000
@@ -180,7 +180,7 @@ i2s_ASN1_INTEGER(X509V3_EXT_METHOD *meth
 }
 
 ASN1_INTEGER *
-s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
+s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, const char *value)
 {
        BIGNUM *bn = NULL;
        ASN1_INTEGER *aint;
Index: lib/libcrypto/x509v3/x509v3.h
===================================================================
RCS file: /var/cvs/src/lib/libcrypto/x509v3/x509v3.h,v
retrieving revision 1.22
diff -u -p -r1.22 x509v3.h
--- lib/libcrypto/x509v3/x509v3.h       22 Jun 2017 17:28:00 -0000      1.22
+++ lib/libcrypto/x509v3/x509v3.h       25 Apr 2018 07:39:34 -0000
@@ -528,7 +528,7 @@ int SXNET_add_id_asc(SXNET **psx, char *
 int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, char *user, int 
userlen); 
 int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *izone, 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);
 
@@ -735,7 +735,7 @@ int X509V3_add_value_bool(const char *na
 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
                                                STACK_OF(CONF_VALUE) **extlist);
 char * i2s_ASN1_INTEGER(X509V3_EXT_METHOD *meth, ASN1_INTEGER *aint);
-ASN1_INTEGER * s2i_ASN1_INTEGER(X509V3_EXT_METHOD *meth, char *value);
+ASN1_INTEGER * s2i_ASN1_INTEGER(X509V3_EXT_METHOD *meth, const char *value);
 char * i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *meth, ASN1_ENUMERATED *aint);
 char * i2s_ASN1_ENUMERATED_TABLE(X509V3_EXT_METHOD *meth, ASN1_ENUMERATED 
*aint);
 int X509V3_EXT_add(X509V3_EXT_METHOD *ext);

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