diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..07374ec
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+CMakeCache.txt
+CMakeFiles
+CTestTestfile.cmake
+cmake_install.cmake
+Testing
diff --git a/ChangeLog b/ChangeLog
index 6b2c969..63eb30f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -10,6 +10,8 @@
    * Moved mpi_inv_mod() outside POLARSSL_GENPRIME
    * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel
      Pégourié-Gonnard)
+   * Fixed possible segfault in mpi_shift_r() (found by Manuel
+     Pégourié-Gonnard)
    * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1
 
 = Version 1.2.0 released 2012-10-31
diff --git a/include/.gitignore b/include/.gitignore
new file mode 100644
index 0000000..f3c7a7c
--- /dev/null
+++ b/include/.gitignore
@@ -0,0 +1 @@
+Makefile
diff --git a/include/polarssl/ssl.h b/include/polarssl/ssl.h
index 5a1e7fc..2020d31 100644
--- a/include/polarssl/ssl.h
+++ b/include/polarssl/ssl.h
@@ -720,20 +720,22 @@
  * \brief          Set the data required to verify peer certificate
  *
  * \param ssl      SSL context
- * \param ca_chain trusted CA chain
+ * \param ca_chain trusted CA chain (meaning all fully trusted top-level CAs)
  * \param ca_crl   trusted CA CRLs
  * \param peer_cn  expected peer CommonName (or NULL)
- *
- * \note           TODO: add two more parameters: depth and crl
  */
 void ssl_set_ca_chain( ssl_context *ssl, x509_cert *ca_chain,
                        x509_crl *ca_crl, const char *peer_cn );
 
 /**
- * \brief          Set own certificate and private key
+ * \brief          Set own certificate chain and private key
+ *
+ *                 Note: own_cert should contain IN order from the bottom
+ *                 up your certificate chain. The top certificate (self-signed)
+ *                 can be omitted.
  *
  * \param ssl      SSL context
- * \param own_cert own public certificate
+ * \param own_cert own public certificate chain
  * \param rsa_key  own private RSA key
  */
 void ssl_set_own_cert( ssl_context *ssl, x509_cert *own_cert,
@@ -747,8 +749,12 @@
  *                 of the callback parameters, with the only change being
  *                 that the rsa_context * is a void * in the callbacks)
  *
+ *                 Note: own_cert should contain IN order from the bottom
+ *                 up your certificate chain. The top certificate (self-signed)
+ *                 can be omitted.
+ *
  * \param ssl      SSL context
- * \param own_cert own public certificate
+ * \param own_cert own public certificate chain
  * \param rsa_key  alternate implementation private RSA key
  * \param rsa_decrypt_func  alternate implementation of \c rsa_pkcs1_decrypt()
  * \param rsa_sign_func     alternate implementation of \c rsa_pkcs1_sign()
diff --git a/library/.gitignore b/library/.gitignore
new file mode 100644
index 0000000..9d80fa4
--- /dev/null
+++ b/library/.gitignore
@@ -0,0 +1,2 @@
+*.o
+libpolarssl*
diff --git a/library/bignum.c b/library/bignum.c
index 23feb6a..f2608c1 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -611,6 +611,9 @@
     v0 = count /  biL;
     v1 = count & (biL - 1);
 
+    if( v0 > X->n || ( v0 == X->n && v1 > 0 ) )
+        return mpi_lset( X, 0 );
+
     /*
      * shift by count / limb_size
      */
diff --git a/programs/.gitignore b/programs/.gitignore
new file mode 100644
index 0000000..d6d9efc
--- /dev/null
+++ b/programs/.gitignore
@@ -0,0 +1,39 @@
+*/Makefile
+aes/aescrypt2
+aes/crypt_and_hash
+hash/generic_sum
+hash/hello
+hash/md5sum
+hash/sha1sum
+hash/sha2sum
+pkey/dh_client
+pkey/dh_genprime
+pkey/dh_server
+pkey/key_app
+pkey/key_app_writer
+pkey/mpi_demo
+pkey/rsa_decrypt
+pkey/rsa_encrypt
+pkey/rsa_genkey
+pkey/rsa_sign
+pkey/rsa_sign_pss
+pkey/rsa_verify
+pkey/rsa_verify_pss
+random/gen_entropy
+random/gen_random_ctr_drbg
+random/gen_random_havege
+ssl/ssl_client1
+ssl/ssl_client2
+ssl/ssl_fork_server
+ssl/ssl_mail_client
+ssl/ssl_server
+ssl/ssl_server2
+test/benchmark
+test/o_p_test
+test/selftest
+test/ssl_cert_test
+test/ssl_test
+util/strerror
+x509/cert_app
+x509/cert_req
+x509/crl_app
diff --git a/programs/ssl/ssl_client1.c b/programs/ssl/ssl_client1.c
index 7631a22..78ad43e 100644
--- a/programs/ssl/ssl_client1.c
+++ b/programs/ssl/ssl_client1.c
@@ -37,6 +37,7 @@
 #include "polarssl/entropy.h"
 #include "polarssl/ctr_drbg.h"
 #include "polarssl/error.h"
+#include "polarssl/certs.h"
 
 #define SERVER_PORT 4433
 #define SERVER_NAME "localhost"
@@ -78,6 +79,7 @@
     entropy_context entropy;
     ctr_drbg_context ctr_drbg;
     ssl_context ssl;
+    x509_cert cacert;
 
     ((void) argc);
     ((void) argv);
@@ -86,6 +88,7 @@
      * 0. Initialize the RNG and the session data
      */
     memset( &ssl, 0, sizeof( ssl_context ) );
+    memset( &cacert, 0, sizeof( x509_cert ) );
 
     printf( "\n  . Seeding the random number generator..." );
     fflush( stdout );
@@ -101,6 +104,28 @@
     printf( " ok\n" );
 
     /*
+     * 0. Initialize certificates
+     */
+    printf( "  . Loading the CA root certificate ..." );
+    fflush( stdout );
+
+#if defined(POLARSSL_CERTS_C)
+    ret = x509parse_crt( &cacert, (unsigned char *) test_ca_crt,
+                         strlen( test_ca_crt ) );
+#else
+    ret = 1;
+    printf("POLARSSL_CERTS_C not defined.");
+#endif
+
+    if( ret < 0 )
+    {
+        printf( " failed\n  !  x509parse_crt returned -0x%x\n\n", -ret );
+        goto exit;
+    }
+
+    printf( " ok (%d skipped)\n", ret );
+
+    /*
      * 1. Start the connection
      */
     printf( "  . Connecting to tcp/%s/%4d...", SERVER_NAME,
@@ -131,7 +156,8 @@
     printf( " ok\n" );
 
     ssl_set_endpoint( &ssl, SSL_IS_CLIENT );
-    ssl_set_authmode( &ssl, SSL_VERIFY_NONE );
+    ssl_set_authmode( &ssl, SSL_VERIFY_OPTIONAL );
+    ssl_set_ca_chain( &ssl, &cacert, NULL, "PolarSSL Server 1" );
 
     ssl_set_rng( &ssl, ctr_drbg_random, &ctr_drbg );
     ssl_set_dbg( &ssl, my_debug, stdout );
@@ -139,6 +165,49 @@
                        net_send, &server_fd );
 
     /*
+     * 4. Handshake
+     */
+    printf( "  . Performing the SSL/TLS handshake..." );
+    fflush( stdout );
+
+    while( ( ret = ssl_handshake( &ssl ) ) != 0 )
+    {
+        if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
+        {
+            printf( " failed\n  ! ssl_handshake returned -0x%x\n\n", -ret );
+            goto exit;
+        }
+    }
+
+    printf( " ok\n" );
+
+    /*
+     * 5. Verify the server certificate
+     */
+    printf( "  . Verifying peer X.509 certificate..." );
+
+    if( ( ret = ssl_get_verify_result( &ssl ) ) != 0 )
+    {
+        printf( " failed\n" );
+
+        if( ( ret & BADCERT_EXPIRED ) != 0 )
+            printf( "  ! server certificate has expired\n" );
+
+        if( ( ret & BADCERT_REVOKED ) != 0 )
+            printf( "  ! server certificate has been revoked\n" );
+
+        if( ( ret & BADCERT_CN_MISMATCH ) != 0 )
+            printf( "  ! CN mismatch (expected CN=%s)\n", "PolarSSL Server 1" );
+
+        if( ( ret & BADCERT_NOT_TRUSTED ) != 0 )
+            printf( "  ! self-signed or not signed by a trusted CA\n" );
+
+        printf( "\n" );
+    }
+    else
+        printf( " ok\n" );
+
+    /*
      * 3. Write the GET request
      */
     printf( "  > Write to server:" );
@@ -206,6 +275,7 @@
     }
 #endif
 
+    x509_free( &cacert );
     net_close( server_fd );
     ssl_free( &ssl );
 
diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 6e047dc..0d7a418 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -127,9 +127,12 @@
 
 #if defined(POLARSSL_FS_IO)
 #define USAGE_IO \
-    "    ca_file=%%s          default: \"\" (pre-loaded)\n" \
-    "    ca_path=%%s          default: \"\" (pre-loaded) (overrides ca_file)\n" \
-    "    crt_file=%%s         default: \"\" (pre-loaded)\n" \
+    "    ca_file=%%s          The single file containing the top-level CA(s) you fully trust\n" \
+    "                        default: \"\" (pre-loaded)\n" \
+    "    ca_path=%%s          The path containing the top-level CA(s) you fully trust\n" \
+    "                        default: \"\" (pre-loaded) (overrides ca_file)\n" \
+    "    crt_file=%%s         Your own cert and chain (in bottom to top order, top may be omitted)\n" \
+    "                        default: \"\" (pre-loaded)\n" \
     "    key_file=%%s         default: \"\" (pre-loaded)\n"
 #else
 #define USAGE_IO \
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index f6cf487..cc94e5c 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -184,9 +184,12 @@
 
 #if defined(POLARSSL_FS_IO)
 #define USAGE_IO \
-    "    ca_file=%%s          default: \"\" (pre-loaded)\n" \
-    "    ca_path=%%s          default: \"\" (pre-loaded) (overrides ca_file)\n" \
-    "    crt_file=%%s         default: \"\" (pre-loaded)\n" \
+    "    ca_file=%%s          The single file containing the top-level CA(s) you fully trust\n" \
+    "                        default: \"\" (pre-loaded)\n" \
+    "    ca_path=%%s          The path containing the top-level CA(s) you fully trust\n" \
+    "                        default: \"\" (pre-loaded) (overrides ca_file)\n" \
+    "    crt_file=%%s         Your own cert and chain (in bottom to top order, top may be omitted)\n" \
+    "                        default: \"\" (pre-loaded)\n" \
     "    key_file=%%s         default: \"\" (pre-loaded)\n"
 #else
 #define USAGE_IO \
diff --git a/tests/.gitignore b/tests/.gitignore
new file mode 100644
index 0000000..084f664
--- /dev/null
+++ b/tests/.gitignore
@@ -0,0 +1,2 @@
+test_suite*
+data_files/mpi_write
diff --git a/tests/suites/test_suite_mpi.data b/tests/suites/test_suite_mpi.data
index 67fa9c3..7197b63 100644
--- a/tests/suites/test_suite_mpi.data
+++ b/tests/suites/test_suite_mpi.data
@@ -309,6 +309,18 @@
 Test mpi_shift_r #2
 mpi_shift_r:10:"120815570979701484704906977000760567182871429114712069861589084706550626575967516787438008593490722779337547394120718248995900363209947025063336882559539208430319216688889117222633155838468458047056355241515415159736436403445579777425189969":45:10:"3433785053053426415343295076376096153094051405637175942660777670498379921354157795219578264137985649407981651226029903483433269093721578004287291678324982297860947730012217028349628999378309630601971640587504883789518896817457"
 
+Test mpi_shift_r #4
+mpi_shift_r:16:"FFFFFFFFFFFFFFFF":63:16:"01"
+
+Test mpi_shift_r #4
+mpi_shift_r:16:"FFFFFFFFFFFFFFFF":64:16:"00"
+
+Test mpi_shift_r #6
+mpi_shift_r:16:"FFFFFFFFFFFFFFFF":65:16:"00"
+
+Test mpi_shift_r #7
+mpi_shift_r:16:"FFFFFFFFFFFFFFFF":128:16:"00"
+
 Base test mpi_mul_mpi #1
 mpi_mul_mpi:10:"5":10:"7":10:"35"
 
diff --git a/tests/suites/test_suite_mpi.function b/tests/suites/test_suite_mpi.function
index 6635392..70d9b4f 100644
--- a/tests/suites/test_suite_mpi.function
+++ b/tests/suites/test_suite_mpi.function
@@ -162,7 +162,7 @@
     TEST_ASSERT( mpi_set_bit( &X, {pos}, {val} ) == 0 );
     TEST_ASSERT( mpi_cmp_mpi( &X, &Y ) == 0 );
 
-    mpi_free( &X );
+    mpi_free( &X ); mpi_free( &Y );
 }
 END_CASE