Add test of sha256_clone function

Author: adustm

TESTS/mbedtls/multi/main.cpp

@@ -67,6 +67,8 @@ void test_case_sha256_split() {
 /* Tests that treating 2 sha256 objects in // does not impact the result */
 void test_case_sha256_multi() {
     const unsigned char test_buf[] = {"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopqabcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopqabcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"};
+    const unsigned char test_buf2[] = {"abcdefghijklmnopqrstuvwxyz012345678901234567890123456789"};
+
     // sha256_output_values for abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq
     const unsigned char test_sum1[] =
     { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
@@ -79,15 +81,23 @@ void test_case_sha256_multi() {
       0x9C, 0xA2, 0x9F, 0x1F, 0xEC, 0x51, 0x15, 0x93,
       0xE2, 0x81, 0xE4, 0x6A, 0x14, 0x0D, 0x81, 0xE0,
       0x00, 0x5F, 0x8F, 0x68, 0x86, 0x69, 0xA0, 0x6C};
-    unsigned char outsum1[32], outsum2[32];
+    // sha256_output_values for abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopqabcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopqabcdefghijklmnopqrstuvwxyz012345678901234567890123456789
+    const unsigned char test_sum3[] =
+    { 0x6D, 0x5D, 0xDB, 0x5F, 0x4A, 0x94, 0xAB, 0x7E,
+      0x5C, 0xF7, 0x9A, 0xD8, 0x3F, 0x58, 0xD3, 0x97,
+      0xFE, 0x79, 0xFB, 0x0D, 0x79, 0xB2, 0x0D, 0x22,
+      0xFF, 0x95, 0x9F, 0x04, 0xA2, 0xE4, 0x6C, 0x68};
+    unsigned char outsum1[32], outsum2[32], outsum3[32];
     int i;
 
     mbedtls_sha256_context ctx1;
     mbedtls_sha256_context ctx2;
+    mbedtls_sha256_context ctx3;
     printf("test sha256_multi\n");
     //Init both contexts
-    mbedtls_sha256_init( &ctx1 );
-    mbedtls_sha256_init( &ctx2 );
+    mbedtls_sha256_init( &ctx1);
+    mbedtls_sha256_init( &ctx2);
+    mbedtls_sha256_init( &ctx3);
     //Start both contexts
     mbedtls_sha256_starts( &ctx1, 0);
     mbedtls_sha256_starts( &ctx2, 0);
@@ -100,25 +110,36 @@ void test_case_sha256_multi() {
     mbedtls_sha256_finish( &ctx1, outsum1 );
     printf("upd ctx2\n");
     mbedtls_sha256_update( &ctx2, test_buf+66, 46 );
+    printf("clone ctx2 in ctx3\n");
+    mbedtls_sha256_clone(&ctx3, (const mbedtls_sha256_context *)&ctx2);
     printf("free ctx1\n");
     mbedtls_sha256_free( &ctx1 );
     printf("upd ctx2\n");
     mbedtls_sha256_update( &ctx2, test_buf+112, 56 );
+    printf("upd ctx3 with different values than ctx2\n");
+    mbedtls_sha256_update( &ctx3, test_buf2, 56 );
     printf("finish ctx2\n");
     mbedtls_sha256_finish( &ctx2, outsum2 );
+    printf("finish ctx3\n");
+    mbedtls_sha256_finish( &ctx3, outsum3 );
     printf("free ctx2\n");
     mbedtls_sha256_free( &ctx2 );
-  
+    printf("free ctx3\n");
+    mbedtls_sha256_free( &ctx3 );
+
     printf("\nreceived result ctx1 : ");
     for (i=0;i<32;i++) { printf("%02X",outsum1[i]);}
     printf("\nawaited result       : 248D6A61D20638B8E5C026930C3E6039A33CE45964FF216F6ECEDD19DB06C1\n"); // for  abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq
     printf("\nreceived result ctx2 : ");
     for (i=0;i<32;i++) { printf("%02X",outsum2[i]);}
     printf("\nawaited result       : 50EA825D9684F4229CA29F1FEC511593E281E46A140D81E0005F8F688669A06C\n"); // for  3*abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq
-  
+    printf("\nreceived result ctx3 : ");
+    for (i=0;i<32;i++) { printf("%02X",outsum3[i]);}
+    printf("\nawaited result       : 6D5DDB5F4A94AB7E5CF79AD83F58D397FE79FB0D79B20D22FF959F04A2E46C68\n"); // for 2*abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq+3*0123456789
     printf("\nend of test sha256\n");
     TEST_ASSERT_EQUAL_UINT8_ARRAY(outsum1, test_sum1,32);
     TEST_ASSERT_EQUAL_UINT8_ARRAY(outsum2, test_sum2,32);
+    TEST_ASSERT_EQUAL_UINT8_ARRAY(outsum3, test_sum3,32);
 }
 #endif //MBEDTLS_SHA256_C