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tests: chacha20: Prepare to char* to data_t* type change

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In preparation of changing the type of some parameters of
test_chacha20() from `char *` to `data_t` to get rid of the
calls to mbedtls_test_unhexify():

- Reduce the size of output[] buffer to 375 as its content
  is "ASCII expended" into a buffer of 751 bytes.
- Align naming of variables to store and check the
  output of mbedtls_chacha20_crypt(). No *dst* variables
  anynore, only *output* variables.
- Use two different buffers to store the expected output
  of mbedtls_chacha20_crypt() (expected_output_str[]) and
  the ASCII string representation of the output of
  mbedtls_chacha20_crypt() (output_string[]). Both were
  stored in dst_str[] before.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2020-06-25 11:33:01 +02:00
parent 4030833bfe
commit 7e512718fe
1 changed files with 21 additions and 17 deletions
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38
tests/suites/test_suite_chacha20.function
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@ -12,31 +12,33 @@ void chacha20_crypt( char *hex_key_string,
char *hex_nonce_string,
int counter,
char *hex_src_string,
char *hex_dst_string )
char *hex_expected_output_string )
{
unsigned char key_str[32]; /* size set by the standard */
unsigned char nonce_str[12]; /* size set by the standard */
unsigned char src_str[375]; /* max size of binary input */
unsigned char dst_str[751]; /* hex expansion of the above */
unsigned char output[751];
unsigned char expected_output_str[375];
unsigned char output[375];
unsigned char output_string[751]; /* ASCII string representation of output */
size_t key_len;
size_t nonce_len;
size_t src_len;
size_t dst_len;
size_t expected_output_len;
mbedtls_chacha20_context ctx;
memset( key_str, 0x00, sizeof( key_str ) );
memset( nonce_str, 0x00, sizeof( nonce_str ) );
memset( src_str, 0x00, sizeof( src_str ) );
memset( dst_str, 0x00, sizeof( dst_str ) );
memset( output, 0x00, sizeof( output ) );
memset( key_str, 0x00, sizeof( key_str ) );
memset( nonce_str, 0x00, sizeof( nonce_str ) );
memset( src_str, 0x00, sizeof( src_str ) );
memset( output, 0x00, sizeof( output ) );
memset( output_string, 0x00, sizeof( output_string ) );
key_len = mbedtls_test_unhexify( key_str, hex_key_string );
nonce_len = mbedtls_test_unhexify( nonce_str, hex_nonce_string );
src_len = mbedtls_test_unhexify( src_str, hex_src_string );
dst_len = mbedtls_test_unhexify( dst_str, hex_dst_string );
expected_output_len = mbedtls_test_unhexify( expected_output_str,
hex_expected_output_string );
TEST_ASSERT( src_len == dst_len );
TEST_ASSERT( src_len == expected_output_len );
TEST_ASSERT( key_len == 32U );
TEST_ASSERT( nonce_len == 12U );
@ -45,8 +47,8 @@ void chacha20_crypt( char *hex_key_string,
*/
TEST_ASSERT( mbedtls_chacha20_crypt( key_str, nonce_str, counter, src_len, src_str, output ) == 0 );
mbedtls_test_hexify( dst_str, output, src_len );
TEST_ASSERT( strcmp( (char*) dst_str, hex_dst_string ) == 0 );
mbedtls_test_hexify( output_string, output, src_len );
TEST_ASSERT( strcmp( (char*) output_string, hex_expected_output_string ) == 0 );
/*
* Test the streaming API
@ -60,8 +62,9 @@ void chacha20_crypt( char *hex_key_string,
memset( output, 0x00, sizeof( output ) );
TEST_ASSERT( mbedtls_chacha20_update( &ctx, src_len, src_str, output ) == 0 );
mbedtls_test_hexify( dst_str, output, src_len );
TEST_ASSERT( strcmp( (char*) dst_str, hex_dst_string ) == 0 );
mbedtls_test_hexify( output_string, output, src_len );
TEST_ASSERT( strcmp( (char*) output_string,
hex_expected_output_string ) == 0 );
/*
* Test the streaming API again, piecewise
@ -75,8 +78,9 @@ void chacha20_crypt( char *hex_key_string,
TEST_ASSERT( mbedtls_chacha20_update( &ctx, 1, src_str, output ) == 0 );
TEST_ASSERT( mbedtls_chacha20_update( &ctx, src_len - 1, src_str + 1, output + 1 ) == 0 );
mbedtls_test_hexify( dst_str, output, src_len );
TEST_ASSERT( strcmp( (char*) dst_str, hex_dst_string ) == 0 );
mbedtls_test_hexify( output_string, output, src_len );
TEST_ASSERT( strcmp( (char*) output_string,
hex_expected_output_string ) == 0 );
mbedtls_chacha20_free( &ctx );
}