diff --git a/ChangeLog b/ChangeLog
index 8e2fc6f..d9a87f1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -10,8 +10,14 @@
      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 failures in MPI on Sparc(64) due to use of bad assembly code.
      Found by Kurt Danielson. #292
 
diff --git a/library/x509parse.c b/library/x509parse.c
index 11e7841..c9db3fa 100644
--- a/library/x509parse.c
+++ b/library/x509parse.c
@@ -3387,7 +3387,8 @@
 
 static int x509parse_verify_top(
                 x509_cert *child, x509_cert *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_cert *, int, int *),
                 void *p_vrfy )
 {
@@ -3428,8 +3429,9 @@
             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 )
         {
             trust_ca = trust_ca->next;
             continue;
@@ -3493,7 +3495,8 @@
 
 static int x509parse_verify_child(
                 x509_cert *child, x509_cert *parent, x509_cert *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_cert *, int, int *),
                 void *p_vrfy )
 {
@@ -3502,6 +3505,15 @@
     unsigned char hash[64];
     x509_cert *grandparent;
 
+    /* Counting intermediate self signed certificates */
+    if( path_cnt != 0 &&
+        child->issuer_raw.len == child->subject_raw.len &&
+        memcmp( child->issuer_raw.p, child->subject_raw.p,
+                child->issuer_raw.len ) == 0 )
+    {
+        self_cnt++;
+    }
+
     /* path_cnt is 0 for the first intermediate CA */
     if( 1 + path_cnt > POLARSSL_X509_MAX_INTERMEDIATE_CA )
     {
@@ -3539,6 +3551,17 @@
             grandparent = grandparent->next;
             continue;
         }
+
+        /* +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 )
+        {
+            grandparent = grandparent->next;
+            continue;
+        }
+
         break;
     }
 
@@ -3547,13 +3570,13 @@
         /*
          * Part of the chain
          */
-        ret = x509parse_verify_child( parent, grandparent, trust_ca, ca_crl, path_cnt + 1, &parent_flags, f_vrfy, p_vrfy );
+        ret = x509parse_verify_child( parent, grandparent, trust_ca, ca_crl, path_cnt + 1, self_cnt, &parent_flags, f_vrfy, p_vrfy );
         if( ret != 0 )
             return( ret );
     }
     else
     {
-        ret = x509parse_verify_top( parent, trust_ca, ca_crl, path_cnt + 1, &parent_flags, f_vrfy, p_vrfy );
+        ret = x509parse_verify_top( parent, trust_ca, ca_crl, path_cnt + 1, self_cnt, &parent_flags, f_vrfy, p_vrfy );
         if( ret != 0 )
             return( ret );
     }
@@ -3581,6 +3604,7 @@
     size_t cn_len;
     int ret;
     int pathlen = 0;
+    int selfsigned = 0;
     x509_cert *parent;
     x509_name *name;
     x509_sequence *cur = NULL;
@@ -3654,6 +3678,16 @@
             parent = parent->next;
             continue;
         }
+
+        /* +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 )
+        {
+            parent = parent->next;
+            continue;
+        }
+
         break;
     }
 
@@ -3662,13 +3696,13 @@
         /*
          * Part of the chain
          */
-        ret = x509parse_verify_child( crt, parent, trust_ca, ca_crl, pathlen, flags, f_vrfy, p_vrfy );
+        ret = x509parse_verify_child( crt, parent, trust_ca, ca_crl, pathlen, selfsigned, flags, f_vrfy, p_vrfy );
         if( ret != 0 )
             return( ret );
     } 
     else
     {
-        ret = x509parse_verify_top( crt, trust_ca, ca_crl, pathlen, flags, f_vrfy, p_vrfy );
+        ret = x509parse_verify_top( crt, trust_ca, ca_crl, 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 0000000..5732a64
--- /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 0000000..3077c3d
--- /dev/null
+++ b/tests/data_files/dir4/cert11.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
+MIIC9zCCAd+gAwIBAgIBATANBgkqhkiG9w0BAQsFADAWMRQwEgYDVQQDEwtUZXN0
+IHJvb3QgMjAeFw0wMTAxMDEwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMBYxFDASBgNV
+BAMTC1Rlc3Qgcm9vdCAyMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA
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+VT8JpeWYkhxaSIHjUW95jJLMVr17it8jHawI05tD26nqDjTq3C2rM4ExpAaK/Dgv
+83ZHe4IdvenkXckDMIjmSsK0GfomZmKvmnfxhg4FnQvZGI48JJUqPA2dHxRhUyr4
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+GfiA42UWN2dKNSqNhBOrP9g5yTcIWXh1Dwpd1Z9vhBCwmBegPqqM5IM1dQ==
+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert12.crt b/tests/data_files/dir4/cert12.crt
new file mode 100644
index 0000000..fd88c2d
--- /dev/null
+++ b/tests/data_files/dir4/cert12.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDCjCCAfKgAwIBAgIBATANBgkqhkiG9w0BAQsFADAWMRQwEgYDVQQDEwtUZXN0
+IHJvb3QgMjAeFw0wMTAxMDEwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMCYxJDAiBgNV
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+sYdYvIpbrFXowjMtBdac+vvhcem7dkCrCdsGylGINWhE2tC9hKmFkFXo4mu/AGDS
+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 0000000..ac01a22
--- /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 0000000..49e1cbb
--- /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 0000000..501c5d7
--- /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 0000000..5dcd65d
--- /dev/null
+++ b/tests/data_files/dir4/cert22.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDBzCCAe+gAwIBAgIBATANBgkqhkiG9w0BAQsFADAWMRQwEgYDVQQDEwtUZXN0
+IHJvb3QgMjAeFw0wMTAxMDEwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMCYxJDAiBgNV
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+j3zwng9liCsxurGMnuV0BPWv/IDYRu/syjee1Qv1VFeRto5D4Rldmi2p1f5iWJCk
+5m5YpRsknaICjYs=
+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert23.crt b/tests/data_files/dir4/cert23.crt
new file mode 100644
index 0000000..6c54725
--- /dev/null
+++ b/tests/data_files/dir4/cert23.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDDDCCAfSgAwIBAgIBATANBgkqhkiG9w0BAQsFADAmMSQwIgYDVQQDExtUZXN0
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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 0000000..8c2af4c
--- /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 0000000..5dcd65d
--- /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 0000000..8e5d192
--- /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 0000000..bebcb65
--- /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 0000000..7065c94
--- /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 0000000..c071318
--- /dev/null
+++ b/tests/data_files/dir4/cert42.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert43.crt b/tests/data_files/dir4/cert43.crt
new file mode 100644
index 0000000..8e5d192
--- /dev/null
+++ b/tests/data_files/dir4/cert43.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert44.crt b/tests/data_files/dir4/cert44.crt
new file mode 100644
index 0000000..084fb2d
--- /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 0000000..e5d5b3d
--- /dev/null
+++ b/tests/data_files/dir4/cert45.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert51.crt b/tests/data_files/dir4/cert51.crt
new file mode 100644
index 0000000..7065c94
--- /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 0000000..c071318
--- /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 0000000..8e5d192
--- /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 0000000..e42e14f
--- /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 0000000..8c2af4c
--- /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 0000000..5dcd65d
--- /dev/null
+++ b/tests/data_files/dir4/cert62.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert63.crt b/tests/data_files/dir4/cert63.crt
new file mode 100644
index 0000000..ffa90e4
--- /dev/null
+++ b/tests/data_files/dir4/cert63.crt
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
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diff --git a/tests/data_files/dir4/cert71.crt b/tests/data_files/dir4/cert71.crt
new file mode 100644
index 0000000..8c2af4c
--- /dev/null
+++ b/tests/data_files/dir4/cert71.crt
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
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+DgQWBBSOBd1fH00Y9r5S8cELj/9IT4BGlDAfBgNVHSMEGDAWgBSOBd1fH00Y9r5S
+8cELj/9IT4BGlDANBgkqhkiG9w0BAQsFAAOCAQEAB9nLaqxsBW0isDaBGNJyzH9O
+WqYY0hex9tm3UqygfE9b9aahykpkowQIzh4D9Xpbd0hZGVlK/sw2qsKj6gDOiMtL
+uWs4gaFNWIQqhVsTzL88c7XaW55n+TRQdVZyy38DZVWphte1Mumc9WB8N15rZTDh
+iXjwGl0mrV1egq4hJZLpy14f6ihqU7KGfmc9onxvgvWxYLi+5v8874c4ophSKsI2
+qVE8iZ6uq2oQ66Pd5S50cYk6MEW5lifAhLM5WFZmW7dRKmykBGZ9rFrJrIvhkmh9
+He7q6TEQP1Wcoc147nIg0BTkHGtdrEv3jIX6UKKUEwUUk9ARB1mSodZQHBhuww==
+-----END CERTIFICATE-----
diff --git a/tests/data_files/dir4/cert72.crt b/tests/data_files/dir4/cert72.crt
new file mode 100644
index 0000000..5dcd65d
--- /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 0000000..6854c74
--- /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 0000000..920c4c2
--- /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 69fb9b1..4e86c4b 100644
--- a/tests/suites/test_suite_x509parse.data
+++ b/tests/suites/test_suite_x509parse.data
@@ -358,6 +358,38 @@
 depends_on:POLARSSL_PEM_C:POLARSSL_FS_IO
 x509_verify:"data_files/cert_example_multi_nocn.crt":"data_files/test-ca.crt":"data_files/crl.pem":"www.example.net":POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_CN_MISMATCH + BADCERT_NOT_TRUSTED:NULL
 
++X509 CRT verify chain #1 (zero pathlen intermediate)
+depends_on:POLARSSL_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA2_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_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA2_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_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA2_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_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA2_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_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA2_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_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA2_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_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA2_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_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA2_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 Parse Selftest
 depends_on:POLARSSL_MD5_C:POLARSSL_PEM_C:POLARSSL_SELF_TEST
 x509_selftest:
diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index 637d13c..e2b8977 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -22,6 +22,35 @@
     return 0;
 }
 
+/* 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
@@ -275,6 +304,36 @@
 END_CASE
 
 BEGIN_CASE
+x509_crt_verify_chain:chain_paths_str:trusted_ca:flags_result
+{
+    char *act;
+    int flags;
+    int result, res;
+    x509_cert trusted, chain;
+    char *chain_paths;
+
+    memset( &chain, 0, sizeof( x509_cert ) );
+    memset( &trusted, 0, sizeof( x509_cert ) );
+    chain_paths = strdup( {chain_paths_str} );
+    TEST_ASSERT( chain_paths != NULL );
+
+    while( ( act = mystrsep( &chain_paths, " " ) ) != NULL )
+        TEST_ASSERT( x509parse_crtfile( &chain, act ) == 0 );
+    TEST_ASSERT( x509parse_crtfile( &trusted, {trusted_ca} ) == 0 );
+
+    res = x509parse_verify( &chain, &trusted, NULL, NULL, &flags, NULL, NULL );
+
+    x509_free( &trusted );
+    x509_free( &chain );
+
+    result = ( {flags_result} ) ? POLARSSL_ERR_X509_CERT_VERIFY_FAILED : 0;
+
+    TEST_ASSERT( res == result );
+    TEST_ASSERT( flags == ( {flags_result} ) );
+}
+END_CASE
+
+BEGIN_CASE
 x509_selftest:
 {
     TEST_ASSERT( x509_self_test( 0 ) == 0 );