90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/* BEGIN_HEADER */
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#include "../library/common.h"
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void fill_arrays( unsigned char *a, unsigned char *b, unsigned char *r1, unsigned char *r2, size_t n )
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{
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for ( size_t i = 0; i < n; i++ )
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{
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a[i] = (unsigned char) i * 3;
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b[i] = (unsigned char) i * 3 + 1;
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r1[i] = (unsigned char) i * 3 + 2;
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r2[i] = r1[i];
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}
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}
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/* END_HEADER */
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/* BEGIN_CASE */
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void mbedtls_xor( int len )
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{
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size_t n = (size_t) len;
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unsigned char *a = NULL, *b = NULL, *r1 = NULL, *r2 = NULL;
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ASSERT_ALLOC( a, n + 1 );
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ASSERT_ALLOC( b, n + 1 );
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ASSERT_ALLOC( r1, n + 1 );
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ASSERT_ALLOC( r2, n + 1 );
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/* Test non-overlapping */
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fill_arrays( a, b, r1, r2, n );
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for ( size_t i = 0; i < n; i++ )
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{
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r1[i] = a[i] ^ b[i];
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}
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mbedtls_xor( r2, a, b, n );
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ASSERT_COMPARE( r1, n, r2, n );
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/* Test r == a */
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fill_arrays( a, b, r1, r2, n );
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for ( size_t i = 0; i < n; i++ )
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{
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r1[i] = r1[i] ^ b[i];
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}
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mbedtls_xor( r2, r2, b, n );
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ASSERT_COMPARE( r1, n, r2, n );
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/* Test r == b */
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fill_arrays( a, b, r1, r2, n );
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for ( size_t i = 0; i < n; i++ )
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{
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r1[i] = a[i] ^ r1[i];
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}
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mbedtls_xor( r2, a, r2, n );
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ASSERT_COMPARE( r1, n, r2, n );
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/* Test a == b */
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fill_arrays( a, b, r1, r2, n );
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for ( size_t i = 0; i < n; i++ )
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{
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r1[i] = a[i] ^ a[i];
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}
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mbedtls_xor( r2, a, a, n );
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ASSERT_COMPARE( r1, n, r2, n );
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/* Test a == b == r */
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fill_arrays( a, b, r1, r2, n );
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for ( size_t i = 0; i < n; i++ )
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{
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r1[i] = r1[i] ^ r1[i];
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}
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mbedtls_xor( r2, r2, r2, n );
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ASSERT_COMPARE( r1, n, r2, n );
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/* Test non-word-aligned buffers, for all combinations of alignedness */
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for ( int i = 0; i < 7; i++ )
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{
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int r_off = i & 1, a_off = (i & 2) >> 1, b_off = (i & 4) >> 2;
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fill_arrays( a, b, r1, r2, n + 1 );
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for ( size_t j = 0; j < n; j++ )
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{
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r1[j + r_off] = a[j + a_off] ^ b[j + b_off];
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}
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mbedtls_xor( r2 + r_off, a + a_off, b + b_off, n );
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ASSERT_COMPARE( r1 + r_off, n, r2 + r_off, n );
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}
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exit:
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mbedtls_free( a );
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mbedtls_free( b );
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mbedtls_free( r1 );
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mbedtls_free( r2 );
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}
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/* END_CASE */
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