[PATCH libcacard 16/45] tests: Verify we can parse properties of PKI object

[Jakub Jelen <jjelen@xxxxxxxxxx>]

 * Also verify the key size inside matches expectation
 * This involves parsing SimpleTLV structures

Signed-off-by: Jakub Jelen <jjelen@xxxxxxxxxx>
Reviewed-by: Robert Relyea <rrelyea@xxxxxxxxxx>
---
 tests/libcacard.c | 61 +++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 56 insertions(+), 5 deletions(-)

diff --git a/tests/libcacard.c b/tests/libcacard.c
index fb2a8ca..38a5ae7 100644
--- a/tests/libcacard.c
+++ b/tests/libcacard.c
@@ -1,5 +1,6 @@
 #include <glib.h>
 #include "libcacard.h"
+#include "simpletlv.h"
 
 #define ARGS "db=\"sql:%s\" use_hw=no soft=(,Test,CAC,,cert1,cert2,cert3)"
 
@@ -9,6 +10,12 @@ static guint nreaders;
 static GMutex mutex;
 static GCond cond;
 
+enum {
+    TEST_PKI,
+    TEST_CCC,
+    TEST_ACA
+};
+
 static gpointer
 events_thread(gpointer arg)
 {
@@ -140,15 +147,16 @@ static void test_xfer(void)
     vreader_free(reader); /* get by id ref */
 }
 
-static void get_properties(VReader *reader)
+static void get_properties(VReader *reader, int object_type)
 {
     int dwRecvLength = APDUBufSize;
     VReaderStatus status;
-    uint8_t pbRecvBuffer[APDUBufSize];
+    uint8_t pbRecvBuffer[APDUBufSize], *p, *p_end;
     uint8_t get_properties[] = {
         /* Get properties */
         0x80, 0x56, 0x01, 0x00, 0x00
     };
+    int verified_pki_properties = 0;
 
     status = vreader_xfr_bytes(reader,
                                get_properties, sizeof(get_properties),
@@ -158,6 +166,49 @@ static void get_properties(VReader *reader)
     g_assert_cmpint(pbRecvBuffer[dwRecvLength-2], ==, VCARD7816_SW1_SUCCESS);
     g_assert_cmpint(pbRecvBuffer[dwRecvLength-1], ==, 0x00);
 
+    /* try to parse the response, if it makes sense */
+    p = pbRecvBuffer;
+    p_end = p + dwRecvLength - 2;
+    while (p < p_end) {
+        uint8_t tag;
+        size_t vlen;
+        if (simpletlv_read_tag(&p, p_end - p, &tag, &vlen) < 0) {
+            g_debug("The generated SimpleTLV can not be parsed");
+            g_assert_not_reached();
+        }
+        g_assert_cmpint(vlen, <=, p_end - p);
+        g_debug("Tag: 0x%02x, Len: %lu", tag, vlen);
+
+        if (tag == 0x51 /* PKI OBJECT */) {
+            /* recursive SimpleTLV structure */
+            uint8_t *p2 = p, *p2_end = p + vlen;
+            while (p2 < p2_end) {
+                uint8_t tag2;
+                size_t vlen2;
+                if (simpletlv_read_tag(&p2, p2_end - p2, &tag2, &vlen2) < 0) {
+                    g_debug("The generated SimpleTLV can not be parsed");
+                    g_assert_not_reached();
+                }
+                g_assert_cmpint(vlen2, <=, p2_end - p2);
+                g_debug("    Tag: 0x%02x, Len: %lu", tag2, vlen2);
+
+                if (tag2 == 0x43 /* PKI PROPERTIES */) {
+                    /* For now, expecting 2048 b RSA keys */
+                    g_assert_cmphex(p2[0], ==, 0x06);
+                    g_assert_cmphex(p2[1], ==, (2048 / 8 / 8));
+                    g_assert_cmphex(p2[2], ==, 0x01);
+                    g_assert_cmphex(p2[3], ==, 0x01);
+                    verified_pki_properties = 1;
+                }
+                p2 += vlen2;
+            }
+        }
+        p += vlen;
+    }
+
+    if (object_type == TEST_PKI) {
+        g_assert_cmpint(verified_pki_properties, ==, 1);
+    }
 }
 
 static void get_acr(VReader *reader)
@@ -397,7 +448,7 @@ static void test_cac_pki(void)
     g_assert_cmphex(pbRecvBuffer[1], ==, 0x00);
 
     /* get properties */
-    get_properties(reader);
+    get_properties(reader, TEST_PKI);
 
     /* get the TAG buffer length */
     read_buffer(reader, CAC_FILE_TAG);
@@ -428,7 +479,7 @@ static void test_cac_ccc(void)
     g_assert_cmphex(pbRecvBuffer[1], ==, 0x00);
 
     /* get properties */
-    get_properties(reader);
+    get_properties(reader, TEST_CCC);
 
     /* get the TAG buffer length */
     read_buffer(reader, CAC_FILE_TAG);
@@ -459,7 +510,7 @@ static void test_cac_aca(void)
     g_assert_cmphex(pbRecvBuffer[1], ==, 0x00);
 
     /* get properties */
-    get_properties(reader);
+    get_properties(reader, TEST_ACA);
 
     /* get ACR */
     get_acr(reader);
-- 
2.17.1

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