diff --git a/library/x509_crt.c b/library/x509_crt.c
index f1f5473..6bec4d0 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -228,35 +228,6 @@
 }
 
 /*
- * Like memcmp, but case-insensitive and always returns -1 if different
- */
-static int x509_memcasecmp( const void *s1, const void *s2, size_t len )
-{
-    size_t i;
-    unsigned char diff;
-    const unsigned char *n1 = s1, *n2 = s2;
-
-    for( i = 0; i < len; i++ )
-    {
-        diff = n1[i] ^ n2[i];
-
-        if( diff == 0 )
-            continue;
-
-        if( diff == 32 &&
-            ( ( n1[i] >= 'a' && n1[i] <= 'z' ) ||
-              ( n1[i] >= 'A' && n1[i] <= 'Z' ) ) )
-        {
-            continue;
-        }
-
-        return( -1 );
-    }
-
-    return( 0 );
-}
-
-/*
  * Return 0 if name matches wildcard, -1 otherwise
  */
 static int x509_check_wildcard( const char *cn, const mbedtls_x509_buf *name )
@@ -281,7 +252,7 @@
         return( -1 );
 
     if( cn_len - cn_idx == name->len - 1 &&
-        x509_memcasecmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 )
+        mbedtls_x509_memcasecmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 )
     {
         return( 0 );
     }
@@ -290,74 +261,6 @@
 }
 
 /*
- * Compare two X.509 strings, case-insensitive, and allowing for some encoding
- * variations (but not all).
- *
- * Return 0 if equal, -1 otherwise.
- */
-static int x509_string_cmp( const mbedtls_x509_buf *a, const mbedtls_x509_buf *b )
-{
-    if( a->tag == b->tag &&
-        a->len == b->len &&
-        memcmp( a->p, b->p, b->len ) == 0 )
-    {
-        return( 0 );
-    }
-
-    if( ( a->tag == MBEDTLS_ASN1_UTF8_STRING || a->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
-        ( b->tag == MBEDTLS_ASN1_UTF8_STRING || b->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
-        a->len == b->len &&
-        x509_memcasecmp( a->p, b->p, b->len ) == 0 )
-    {
-        return( 0 );
-    }
-
-    return( -1 );
-}
-
-/*
- * Compare two X.509 Names (aka rdnSequence).
- *
- * See RFC 5280 section 7.1, though we don't implement the whole algorithm:
- * we sometimes return unequal when the full algorithm would return equal,
- * but never the other way. (In particular, we don't do Unicode normalisation
- * or space folding.)
- *
- * Return 0 if equal, -1 otherwise.
- */
-static int x509_name_cmp( const mbedtls_x509_name *a, const mbedtls_x509_name *b )
-{
-    /* Avoid recursion, it might not be optimised by the compiler */
-    while( a != NULL || b != NULL )
-    {
-        if( a == NULL || b == NULL )
-            return( -1 );
-
-        /* type */
-        if( a->oid.tag != b->oid.tag ||
-            a->oid.len != b->oid.len ||
-            memcmp( a->oid.p, b->oid.p, b->oid.len ) != 0 )
-        {
-            return( -1 );
-        }
-
-        /* value */
-        if( x509_string_cmp( &a->val, &b->val ) != 0 )
-            return( -1 );
-
-        /* structure of the list of sets */
-        if( a->next_merged != b->next_merged )
-            return( -1 );
-
-        a = a->next;
-        b = b->next;
-    }
-
-    /* a == NULL == b */
-    return( 0 );
-}
-
-/*
  * Reset (init or clear) a verify_chain
  */
 static void x509_crt_verify_chain_reset(
@@ -1838,7 +1741,7 @@
     while( crl_list != NULL )
     {
         if( crl_list->version == 0 ||
-            x509_name_cmp( &crl_list->issuer, &ca->subject ) != 0 )
+            mbedtls_x509_name_cmp( &crl_list->issuer, &ca->subject ) != 0 )
         {
             crl_list = crl_list->next;
             continue;
@@ -1959,7 +1862,7 @@
     int need_ca_bit;
 
     /* Parent must be the issuer */
-    if( x509_name_cmp( &child->issuer, &parent->subject ) != 0 )
+    if( mbedtls_x509_name_cmp( &child->issuer, &parent->subject ) != 0 )
         return( -1 );
 
     /* Parent must have the basicConstraints CA bit set as a general rule */
@@ -2225,7 +2128,7 @@
     mbedtls_x509_crt *cur;
 
     /* must be self-issued */
-    if( x509_name_cmp( &crt->issuer, &crt->subject ) != 0 )
+    if( mbedtls_x509_name_cmp( &crt->issuer, &crt->subject ) != 0 )
         return( -1 );
 
     /* look for an exact match with trusted cert */
@@ -2390,7 +2293,7 @@
          * These can occur with some strategies for key rollover, see [SIRO],
          * and should be excluded from max_pathlen checks. */
         if( ver_chain->len != 1 &&
-            x509_name_cmp( &child->issuer, &child->subject ) == 0 )
+            mbedtls_x509_name_cmp( &child->issuer, &child->subject ) == 0 )
         {
             self_cnt++;
         }
@@ -2435,7 +2338,7 @@
 {
     /* try exact match */
     if( name->len == cn_len &&
-        x509_memcasecmp( cn, name->p, cn_len ) == 0 )
+        mbedtls_x509_memcasecmp( cn, name->p, cn_len ) == 0 )
     {
         return( 0 );
     }