diff --git a/ChangeLog b/ChangeLog
index 57592b410..52c1bcbdd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -13,8 +13,14 @@ Security
      Cannot be triggered remotely unless you create X.509 certificates based
      on untrusted input or write keys of untrusted origin. Found by Guido
      Vranken, Interlworks.
+   * The X509 max_pathlen constraint was not enforced on intermediate
+     certificates. Found by Nicholas Wilson, fix and tests provided by
+     Janos Follath. #280 and #319
 
 Bugfix
+   * Self-signed certificates were not excluded from pathlen counting,
+     resulting in some valid X.509 being incorrectly rejected. Found and fix
+     provided by Janos Follath. #319
    * Fix bug causing some handshakes to fail due to some non-fatal alerts not
      begin properly ignored. Found by mancha and Kasom Koht-arsa, #308
    * Fix build error with configurations where ECDHE-PSK is the only key
diff --git a/library/x509_crt.c b/library/x509_crt.c
index 200f6bbab..92a9b17d0 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -1766,7 +1766,8 @@ static int x509_crt_check_parent( const x509_crt *child,
 
 static int x509_crt_verify_top(
                 x509_crt *child, x509_crt *trust_ca,
-                x509_crl *ca_crl, int path_cnt, int *flags,
+                x509_crl *ca_crl,
+                int path_cnt, int self_cnt, int *flags,
                 int (*f_vrfy)(void *, x509_crt *, int, int *),
                 void *p_vrfy )
 {
@@ -1815,8 +1816,9 @@ static int x509_crt_verify_top(
             check_path_cnt--;
         }
 
+        /* Self signed certificates do not count towards the limit */
         if( trust_ca->max_pathlen > 0 &&
-            trust_ca->max_pathlen < check_path_cnt )
+            trust_ca->max_pathlen < check_path_cnt - self_cnt )
         {
             continue;
         }
@@ -1881,8 +1883,9 @@ static int x509_crt_verify_top(
 }
 
 static int x509_crt_verify_child(
-                x509_crt *child, x509_crt *parent, x509_crt *trust_ca,
-                x509_crl *ca_crl, int path_cnt, int *flags,
+                x509_crt *child, x509_crt *parent,
+                x509_crt *trust_ca, x509_crl *ca_crl,
+                int path_cnt, int self_cnt, int *flags,
                 int (*f_vrfy)(void *, x509_crt *, int, int *),
                 void *p_vrfy )
 {
@@ -1892,6 +1895,10 @@ static int x509_crt_verify_child(
     x509_crt *grandparent;
     const md_info_t *md_info;
 
+    /* Counting intermediate self signed certificates */
+    if( ( path_cnt != 0 ) && x509_name_cmp( &child->issuer, &child->subject ) == 0 ) 
+        self_cnt++;
+
     /* path_cnt is 0 for the first intermediate CA */
     if( 1 + path_cnt > POLARSSL_X509_MAX_INTERMEDIATE_CA )
     {
@@ -1943,7 +1950,7 @@ static int x509_crt_verify_child(
     if( grandparent != NULL )
     {
         ret = x509_crt_verify_top( parent, grandparent, ca_crl,
-                                path_cnt + 1, &parent_flags, f_vrfy, p_vrfy );
+                                path_cnt + 1, self_cnt, &parent_flags, f_vrfy, p_vrfy );
         if( ret != 0 )
             return( ret );
     }
@@ -1954,6 +1961,15 @@ static int x509_crt_verify_child(
              grandparent != NULL;
              grandparent = grandparent->next )
         {
+            /* +2 because the current step is not yet accounted for
+             * and because max_pathlen is one higher than it should be.
+             * Also self signed certificates do not count to the limit. */
+            if( grandparent->max_pathlen > 0 &&
+                grandparent->max_pathlen < 2 + path_cnt - self_cnt )
+            {
+                continue;
+            }
+
             if( x509_crt_check_parent( parent, grandparent,
                                        0, path_cnt == 0 ) == 0 )
                 break;
@@ -1963,7 +1979,7 @@ static int x509_crt_verify_child(
         if( grandparent != NULL )
         {
             ret = x509_crt_verify_child( parent, grandparent, trust_ca, ca_crl,
-                                         path_cnt + 1, &parent_flags,
+                                         path_cnt + 1, self_cnt, &parent_flags,
                                          f_vrfy, p_vrfy );
             if( ret != 0 )
                 return( ret );
@@ -1971,7 +1987,7 @@ static int x509_crt_verify_child(
         else
         {
             ret = x509_crt_verify_top( parent, trust_ca, ca_crl,
-                                       path_cnt + 1, &parent_flags,
+                                       path_cnt + 1, self_cnt, &parent_flags,
                                        f_vrfy, p_vrfy );
             if( ret != 0 )
                 return( ret );
@@ -2001,6 +2017,7 @@ int x509_crt_verify( x509_crt *crt,
     size_t cn_len;
     int ret;
     int pathlen = 0;
+    int selfsigned = 0;
     x509_crt *parent;
     x509_name *name;
     x509_sequence *cur = NULL;
@@ -2067,7 +2084,7 @@ int x509_crt_verify( x509_crt *crt,
     if( parent != NULL )
     {
         ret = x509_crt_verify_top( crt, parent, ca_crl,
-                                   pathlen, flags, f_vrfy, p_vrfy );
+                                   pathlen, selfsigned, flags, f_vrfy, p_vrfy );
         if( ret != 0 )
             return( ret );
     }
@@ -2076,6 +2093,14 @@ int x509_crt_verify( x509_crt *crt,
         /* Look for a parent upwards the chain */
         for( parent = crt->next; parent != NULL; parent = parent->next )
         {
+            /* +2 because the current step is not yet accounted for
+             * and because max_pathlen is one higher than it should be */
+            if( parent->max_pathlen > 0 &&
+                parent->max_pathlen < 2 + pathlen )
+            {
+                continue;
+            }
+
             if( x509_crt_check_parent( crt, parent, 0, pathlen == 0 ) == 0 )
                 break;
         }
@@ -2084,14 +2109,14 @@ int x509_crt_verify( x509_crt *crt,
         if( parent != NULL )
         {
             ret = x509_crt_verify_child( crt, parent, trust_ca, ca_crl,
-                                         pathlen, flags, f_vrfy, p_vrfy );
+                                         pathlen, selfsigned, flags, f_vrfy, p_vrfy );
             if( ret != 0 )
                 return( ret );
         }
         else
         {
             ret = x509_crt_verify_top( crt, trust_ca, ca_crl,
-                                       pathlen, flags, f_vrfy, p_vrfy );
+                                       pathlen, selfsigned, flags, f_vrfy, p_vrfy );
             if( ret != 0 )
                 return( ret );
         }
diff --git a/tests/data_files/dir4/Readme b/tests/data_files/dir4/Readme
new file mode 100644
index 000000000..5732a6463
--- /dev/null
+++ b/tests/data_files/dir4/Readme
@@ -0,0 +1,38 @@
+This directory contains the certificates for the tests targeting the enforcement of the policy indicated by the *pathLenConstraint* field. All leaf elements were generated with *is_ca* unset and all roots with the *selfsign=1* option. 
+
+1. zero pathlen constraint on an intermediate CA (invalid)
+```
+cert11.crt -> cert12.crt (max_pathlen=0) -> cert13.crt -> cert14.crt
+```
+
+2. zero pathlen constraint on the root CA (invalid)
+```
+cert21.crt (max_pathlen=0) -> cert22.crt -> cert23.crt
+```
+
+3. nonzero pathlen constraint on the root CA (invalid)
+```
+cert31.crt (max_pathlen=1) -> cert32.crt -> cert33.crt -> cert34.crt
+```
+
+4. nonzero pathlen constraint on an intermediate CA (invalid)
+```
+cert41.crt -> cert42.crt (max_pathlen=1) -> cert43.crt -> cert44.crt -> cert45.crt 
+```
+
+5. nonzero pathlen constraint on an intermediate CA with maximum number of elements in the chain (valid)
+```
+cert51.crt -> cert52.crt (max_pathlen=1) -> cert53.crt -> cert54.crt
+```
+
+6. nonzero pathlen constraint on the root CA with maximum number of elements in the chain (valid)
+```
+cert61.crt (max_pathlen=1) -> cert62.crt -> cert63.crt
+```
+
+7. pathlen constraint on the root CA with maximum number of elements and a self signed certificate in the chain (valid) 
+(This situation happens for example when a root of some hierarchy gets integrated into another hierarchy. In this case the certificates issued before the integration will have an intermadiate self signed certificate in their chain)
+```
+cert71.crt (max_pathlen=1) -> cert72.crt -> cert73.crt (self signed) -> cert74.crt -> cert74.crt
+```
+
diff --git a/tests/data_files/dir4/cert11.crt b/tests/data_files/dir4/cert11.crt
new file mode 100644
index 000000000..3077c3da4
--- /dev/null
+++ b/tests/data_files/dir4/cert11.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
+MIIC9zCCAd+gAwIBAgIBATANBgkqhkiG9w0BAQsFADAWMRQwEgYDVQQDEwtUZXN0
+IHJvb3QgMjAeFw0wMTAxMDEwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMBYxFDASBgNV
+BAMTC1Rlc3Qgcm9vdCAyMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA
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+jkkuFLONwe0vlxZFaabaFqSgkoS5eZ50D0dmuUkpJRNMnGK1B/ja5RewtAdxD6us
+VT8JpeWYkhxaSIHjUW95jJLMVr17it8jHawI05tD26nqDjTq3C2rM4ExpAaK/Dgv
+83ZHe4IdvenkXckDMIjmSsK0GfomZmKvmnfxhg4FnQvZGI48JJUqPA2dHxRhUyr4
+ohBmH5Xi5oLICd85GRi8YqD00agKL99EjGulaKNEdsQkrC4ZvY6QDV0EEnbu8b4R
+GfiA42UWN2dKNSqNhBOrP9g5yTcIWXh1Dwpd1Z9vhBCwmBegPqqM5IM1dQ==
+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert12.crt b/tests/data_files/dir4/cert12.crt
new file mode 100644
index 000000000..fd88c2d13
--- /dev/null
+++ b/tests/data_files/dir4/cert12.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDCjCCAfKgAwIBAgIBATANBgkqhkiG9w0BAQsFADAWMRQwEgYDVQQDEwtUZXN0
+IHJvb3QgMjAeFw0wMTAxMDEwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMCYxJDAiBgNV
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+M4/59TlMeK8X+WZ9zBs=
+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert13.crt b/tests/data_files/dir4/cert13.crt
new file mode 100644
index 000000000..ac01a22cd
--- /dev/null
+++ b/tests/data_files/dir4/cert13.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDFzCCAf+gAwIBAgIBATANBgkqhkiG9w0BAQsFADAmMSQwIgYDVQQDExtUZXN0
+IGludGVybWVkaWF0ZSBtYXhwYXRoIDEwHhcNMDEwMTAxMDAwMDAwWhcNMzAxMjMx
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+m8pqKNnRYGCtQwppBYVsoBisga2ymtNud7K+
+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert14.crt b/tests/data_files/dir4/cert14.crt
new file mode 100644
index 000000000..49e1cbb2e
--- /dev/null
+++ b/tests/data_files/dir4/cert14.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDDDCCAfSgAwIBAgIBATANBgkqhkiG9w0BAQsFADAmMSQwIgYDVQQDExtUZXN0
+IGludGVybWVkaWF0ZSBtYXhwYXRoIDIwHhcNMDEwMTAxMDAwMDAwWhcNMzAxMjMx
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+sZfh98BafcaFGjz605V36g==
+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert21.crt b/tests/data_files/dir4/cert21.crt
new file mode 100644
index 000000000..501c5d7f2
--- /dev/null
+++ b/tests/data_files/dir4/cert21.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
+MIIC+jCCAeKgAwIBAgIBATANBgkqhkiG9w0BAQsFADAWMRQwEgYDVQQDEwtUZXN0
+IHJvb3QgMjAeFw0wMTAxMDEwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMBYxFDASBgNV
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+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert22.crt b/tests/data_files/dir4/cert22.crt
new file mode 100644
index 000000000..5dcd65def
--- /dev/null
+++ b/tests/data_files/dir4/cert22.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDBzCCAe+gAwIBAgIBATANBgkqhkiG9w0BAQsFADAWMRQwEgYDVQQDEwtUZXN0
+IHJvb3QgMjAeFw0wMTAxMDEwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMCYxJDAiBgNV
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diff --git a/tests/data_files/dir4/cert23.crt b/tests/data_files/dir4/cert23.crt
new file mode 100644
index 000000000..6c5472549
--- /dev/null
+++ b/tests/data_files/dir4/cert23.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert31.crt b/tests/data_files/dir4/cert31.crt
new file mode 100644
index 000000000..8c2af4c45
--- /dev/null
+++ b/tests/data_files/dir4/cert31.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert32.crt b/tests/data_files/dir4/cert32.crt
new file mode 100644
index 000000000..5dcd65def
--- /dev/null
+++ b/tests/data_files/dir4/cert32.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert33.crt b/tests/data_files/dir4/cert33.crt
new file mode 100644
index 000000000..8e5d192b6
--- /dev/null
+++ b/tests/data_files/dir4/cert33.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert34.crt b/tests/data_files/dir4/cert34.crt
new file mode 100644
index 000000000..bebcb651d
--- /dev/null
+++ b/tests/data_files/dir4/cert34.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert41.crt b/tests/data_files/dir4/cert41.crt
new file mode 100644
index 000000000..7065c9426
--- /dev/null
+++ b/tests/data_files/dir4/cert41.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert42.crt b/tests/data_files/dir4/cert42.crt
new file mode 100644
index 000000000..c0713188a
--- /dev/null
+++ b/tests/data_files/dir4/cert42.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert43.crt b/tests/data_files/dir4/cert43.crt
new file mode 100644
index 000000000..8e5d192b6
--- /dev/null
+++ b/tests/data_files/dir4/cert43.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert44.crt b/tests/data_files/dir4/cert44.crt
new file mode 100644
index 000000000..084fb2d82
--- /dev/null
+++ b/tests/data_files/dir4/cert44.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert45.crt b/tests/data_files/dir4/cert45.crt
new file mode 100644
index 000000000..e5d5b3d89
--- /dev/null
+++ b/tests/data_files/dir4/cert45.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert51.crt b/tests/data_files/dir4/cert51.crt
new file mode 100644
index 000000000..7065c9426
--- /dev/null
+++ b/tests/data_files/dir4/cert51.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert52.crt b/tests/data_files/dir4/cert52.crt
new file mode 100644
index 000000000..c0713188a
--- /dev/null
+++ b/tests/data_files/dir4/cert52.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert53.crt b/tests/data_files/dir4/cert53.crt
new file mode 100644
index 000000000..8e5d192b6
--- /dev/null
+++ b/tests/data_files/dir4/cert53.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert54.crt b/tests/data_files/dir4/cert54.crt
new file mode 100644
index 000000000..e42e14f54
--- /dev/null
+++ b/tests/data_files/dir4/cert54.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert61.crt b/tests/data_files/dir4/cert61.crt
new file mode 100644
index 000000000..8c2af4c45
--- /dev/null
+++ b/tests/data_files/dir4/cert61.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert62.crt b/tests/data_files/dir4/cert62.crt
new file mode 100644
index 000000000..5dcd65def
--- /dev/null
+++ b/tests/data_files/dir4/cert62.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert63.crt b/tests/data_files/dir4/cert63.crt
new file mode 100644
index 000000000..ffa90e4fd
--- /dev/null
+++ b/tests/data_files/dir4/cert63.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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+VEyxyevfwivF4EQ70Jw=
+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert71.crt b/tests/data_files/dir4/cert71.crt
new file mode 100644
index 000000000..8c2af4c45
--- /dev/null
+++ b/tests/data_files/dir4/cert71.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----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==
+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert72.crt b/tests/data_files/dir4/cert72.crt
new file mode 100644
index 000000000..5dcd65def
--- /dev/null
+++ b/tests/data_files/dir4/cert72.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert73.crt b/tests/data_files/dir4/cert73.crt
new file mode 100644
index 000000000..6854c74a0
--- /dev/null
+++ b/tests/data_files/dir4/cert73.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert74.crt b/tests/data_files/dir4/cert74.crt
new file mode 100644
index 000000000..920c4c208
--- /dev/null
+++ b/tests/data_files/dir4/cert74.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/tests/suites/test_suite_x509parse.data b/tests/suites/test_suite_x509parse.data
index 3e7ea37e7..a540db256 100644
--- a/tests/suites/test_suite_x509parse.data
+++ b/tests/suites/test_suite_x509parse.data
@@ -1124,6 +1124,38 @@ X509 CRT parse path #4 (two certs, one non-cert)
 depends_on:POLARSSL_SHA1_C:POLARSSL_RSA_C:POLARSSL_SHA256_C:POLARSSL_ECDSA_C:POLARSSL_ECP_DP_SECP384R1_ENABLED
 x509_crt_parse_path:"data_files/dir3":1:2
 
+X509 CRT verify chain #1 (zero pathlen intermediate)
+depends_on:POLARSSL_SHA256_C:POLARSSL_RSA_C
+x509_crt_verify_chain:"data_files/dir4/cert14.crt data_files/dir4/cert13.crt data_files/dir4/cert12.crt":"data_files/dir4/cert11.crt":BADCERT_NOT_TRUSTED
+
+X509 CRT verify chain #2 (zero pathlen root)
+depends_on:POLARSSL_SHA256_C:POLARSSL_RSA_C
+x509_crt_verify_chain:"data_files/dir4/cert23.crt data_files/dir4/cert22.crt":"data_files/dir4/cert21.crt":BADCERT_NOT_TRUSTED
+
+X509 CRT verify chain #3 (nonzero pathlen root)
+depends_on:POLARSSL_SHA256_C:POLARSSL_RSA_C
+x509_crt_verify_chain:"data_files/dir4/cert34.crt data_files/dir4/cert33.crt data_files/dir4/cert32.crt":"data_files/dir4/cert31.crt":BADCERT_NOT_TRUSTED
+
+X509 CRT verify chain #4 (nonzero pathlen intermediate)
+depends_on:POLARSSL_SHA256_C:POLARSSL_RSA_C
+x509_crt_verify_chain:"data_files/dir4/cert45.crt data_files/dir4/cert44.crt data_files/dir4/cert43.crt data_files/dir4/cert42.crt":"data_files/dir4/cert41.crt":BADCERT_NOT_TRUSTED
+
+X509 CRT verify chain #5 (nonzero maxpathlen intermediate)
+depends_on:POLARSSL_SHA256_C:POLARSSL_RSA_C
+x509_crt_verify_chain:"data_files/dir4/cert54.crt data_files/dir4/cert53.crt data_files/dir4/cert52.crt":"data_files/dir4/cert51.crt":0
+
+X509 CRT verify chain #6 (nonzero maxpathlen root)
+depends_on:POLARSSL_SHA256_C:POLARSSL_RSA_C
+x509_crt_verify_chain:"data_files/dir4/cert63.crt data_files/dir4/cert62.crt":"data_files/dir4/cert61.crt":0
+
+X509 CRT verify chain #7 (maxpathlen root, self signed in path)
+depends_on:POLARSSL_SHA256_C:POLARSSL_RSA_C
+x509_crt_verify_chain:"data_files/dir4/cert74.crt data_files/dir4/cert73.crt data_files/dir4/cert72.crt":"data_files/dir4/cert71.crt":0
+
+X509 CRT verify chain #8 (self signed maxpathlen root)
+depends_on:POLARSSL_SHA256_C:POLARSSL_RSA_C
+x509_crt_verify_chain:"data_files/dir4/cert61.crt data_files/dir4/cert63.crt data_files/dir4/cert62.crt":"data_files/dir4/cert61.crt":0
+
 X509 OID description #1
 x509_oid_desc:"2B06010505070301":"TLS Web Server Authentication"
 
diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index adaff5135..18837c532 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -83,6 +83,36 @@ int verify_print( void *data, x509_crt *crt, int certificate_depth, int *flags )
     return( 0 );
 }
 #endif /* POLARSSL_X509_CRT_PARSE_C */
+
+/* strsep() not available on Windows */
+char *mystrsep(char **stringp, const char *delim)
+{
+    const char *p;
+    char *ret = *stringp;
+
+    if( *stringp == NULL )
+        return( NULL );
+
+    for( ; ; (*stringp)++ )
+    {
+        if( **stringp == '\0' )
+        {
+            *stringp = NULL;
+            goto done;
+        }
+
+        for( p = delim; *p != '\0'; p++ )
+            if( **stringp == *p )
+            {
+                **stringp = '\0';
+                (*stringp)++;
+                goto done;
+            }
+    }
+
+done:
+    return( ret );
+}
 /* END_HEADER */
 
 /* BEGIN_DEPENDENCIES
@@ -444,6 +474,34 @@ exit:
 }
 /* END_CASE */
 
+/* BEGIN_CASE depends_on:POLARSSL_FS_IO:POLARSSL_X509_CRT_PARSE_C */
+void x509_crt_verify_chain(  char *chain_paths, char *trusted_ca, int flags_result )
+{
+    char* act;
+    int flags;
+    int result, res;
+    x509_crt trusted, chain;
+
+    result = flags_result ? POLARSSL_ERR_X509_CERT_VERIFY_FAILED : 0;
+
+    x509_crt_init( &chain );
+    x509_crt_init( &trusted );
+
+    while( ( act = mystrsep( &chain_paths, " " ) ) != NULL )
+        TEST_ASSERT( x509_crt_parse_file( &chain, act ) == 0 );
+    TEST_ASSERT( x509_crt_parse_file( &trusted, trusted_ca ) == 0 );
+
+    res = x509_crt_verify( &chain, &trusted, NULL, NULL, &flags, NULL, NULL );
+
+    TEST_ASSERT( res == result );
+    TEST_ASSERT( flags == flags_result );
+
+exit:
+    x509_crt_free( &trusted );
+    x509_crt_free( &chain );
+}
+/* END_CASE */
+
 /* BEGIN_CASE depends_on:POLARSSL_X509_USE_C */
 void x509_oid_desc( char *oid_str, char *ref_desc )
 {