From 56e942e252f912f816f98982439e43bba80841ed Mon Sep 17 00:00:00 2001
From: Andres AG <andres.amayagarcia@arm.com>
Date: Wed, 1 Mar 2017 11:53:29 +0000
Subject: [PATCH] Add negative testing for mbedtls_pem_read_buffer()

---
 tests/suites/test_suite_pem.data     | 12 ++++++++++++
 tests/suites/test_suite_pem.function | 23 +++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/tests/suites/test_suite_pem.data b/tests/suites/test_suite_pem.data
index 973c92325..38018100c 100644
--- a/tests/suites/test_suite_pem.data
+++ b/tests/suites/test_suite_pem.data
@@ -15,3 +15,15 @@ mbedtls_pem_write_buffer:"-----START TEST-----\n":"-----END TEST-----\n":"000102
 
 PEM write (exactly two lines + 1)
 mbedtls_pem_write_buffer:"-----START TEST-----\n":"-----END TEST-----\n":"000102030405060708090A0B0C0D0E0F000102030405060708090A0B0C0D0E0F000102030405060708090A0B0C0D0E0F000102030405060708090A0B0C0D0E0F000102030405060708090A0B0C0D0E0F000102030405060708090A0B0C0D0E0F00":"-----START TEST-----\nAAECAwQFBgcICQoLDA0ODwABAgMEBQYHCAkKCwwNDg8AAQIDBAUGBwgJCgsMDQ4P\nAAECAwQFBgcICQoLDA0ODwABAgMEBQYHCAkKCwwNDg8AAQIDBAUGBwgJCgsMDQ4P\nAA==\n-----END TEST-----\n"
+
+PEM read (malformed PEM DES-CBC)
+depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC
+mbedtls_pem_read_buffer:"-----BEGIN EC PRIVATE KEY-----":"-----END EC PRIVATE KEY-----":"-----BEGIN EC PRIVATE KEY-----\nProc-Type\: 4,ENCRYPTED\nDEK-Info\: DES-CBC,AA94892A169FA426\n\nMAAA\n-----END EC PRIVATE KEY-----":"pwd":MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH
+
+PEM read (malformed PEM DES-EDE3-CBC)
+depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC
+mbedtls_pem_read_buffer:"-----BEGIN EC PRIVATE KEY-----":"-----END EC PRIVATE KEY-----":"-----BEGIN EC PRIVATE KEY-----\nProc-Type\: 4,ENCRYPTED\nDEK-Info\: DES-EDE3-CBC,AA94892A169FA426\n\nMAAA\n-----END EC PRIVATE KEY-----":"pwd":MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH
+
+PEM read (malformed PEM AES-128-CBC)
+depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
+mbedtls_pem_read_buffer:"-----BEGIN EC PRIVATE KEY-----":"-----END EC PRIVATE KEY-----":"-----BEGIN EC PRIVATE KEY-----\nProc-Type\: 4,ENCRYPTED\nDEK-Info\: AES-128-CBC,AA94892A169FA426AA94892A169FA426\n\nMAAA\n-----END EC PRIVATE KEY-----":"pwd":MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH
diff --git a/tests/suites/test_suite_pem.function b/tests/suites/test_suite_pem.function
index 6a62bfed9..330c457b9 100644
--- a/tests/suites/test_suite_pem.function
+++ b/tests/suites/test_suite_pem.function
@@ -1,6 +1,8 @@
 /* BEGIN_HEADER */
 #include "mbedtls/base64.h"
 #include "mbedtls/pem.h"
+#include "mbedtls/des.h"
+#include "mbedtls/aes.h"
 /* END_HEADER */
 
 /* BEGIN_DEPENDENCIES
@@ -38,3 +40,24 @@ exit:
     mbedtls_free( check_buf );
 }
 /* END_CASE */
+
+/* BEGIN_CASE */
+void mbedtls_pem_read_buffer( char *header, char *footer, char *data, char *pwd,
+            int res )
+{
+    mbedtls_pem_context ctx;
+    int ret;
+    size_t use_len = 0;
+    size_t pwd_len = strlen( pwd );
+
+    mbedtls_pem_init( &ctx );
+
+    ret = mbedtls_pem_read_buffer( &ctx, header, footer, (unsigned char *)data,
+                (unsigned char *)pwd, pwd_len, &use_len );
+    TEST_ASSERT( ret == res );
+
+exit:
+    mbedtls_pem_free( &ctx );
+
+}
+/* END_CASE */