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/* BEGIN_HEADER */
#include "mbedtls/chacha20.h"
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:MBEDTLS_CHACHA20_C
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void chacha20_crypt( data_t *key_str,
data_t *nonce_str,
int counter,
data_t *src_str,
data_t *expected_output_str )
{
unsigned char output[375];
mbedtls_chacha20_context ctx;
memset( output, 0x00, sizeof( output ) );
TEST_ASSERT( src_str->len == expected_output_str->len );
TEST_ASSERT( key_str->len == 32U );
TEST_ASSERT( nonce_str->len == 12U );
/*
* Test the integrated API
*/
TEST_ASSERT( mbedtls_chacha20_crypt( key_str->x, nonce_str->x, counter, src_str->len, src_str->x, output ) == 0 );
ASSERT_COMPARE( output, expected_output_str->len,
expected_output_str->x, expected_output_str->len );
/*
* Test the streaming API
*/
mbedtls_chacha20_init( &ctx );
TEST_ASSERT( mbedtls_chacha20_setkey( &ctx, key_str->x ) == 0 );
TEST_ASSERT( mbedtls_chacha20_starts( &ctx, nonce_str->x, counter ) == 0 );
memset( output, 0x00, sizeof( output ) );
TEST_ASSERT( mbedtls_chacha20_update( &ctx, src_str->len, src_str->x, output ) == 0 );
ASSERT_COMPARE( output, expected_output_str->len,
expected_output_str->x, expected_output_str->len );
/*
* Test the streaming API again, piecewise
*/
/* Don't free/init the context nor set the key again,
* in order to test that starts() does the right thing. */
TEST_ASSERT( mbedtls_chacha20_starts( &ctx, nonce_str->x, counter ) == 0 );
memset( output, 0x00, sizeof( output ) );
TEST_ASSERT( mbedtls_chacha20_update( &ctx, 1, src_str->x, output ) == 0 );
TEST_ASSERT( mbedtls_chacha20_update( &ctx, src_str->len - 1,
src_str->x + 1, output + 1 ) == 0 );
ASSERT_COMPARE( output, expected_output_str->len,
expected_output_str->x, expected_output_str->len );
mbedtls_chacha20_free( &ctx );
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
void chacha20_self_test()
{
TEST_ASSERT( mbedtls_chacha20_self_test( 1 ) == 0 );
}
/* END_CASE */
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