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[crypto] Expose shifted out bit from big integer shifts
Expose the bit shifted out as a result of shifting a big integer left or right. Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
@@ -78,18 +78,18 @@ int bigint_subtract_sample ( const bigint_element_t *subtrahend0,
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return bigint_subtract ( subtrahend, value );
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}
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void bigint_shl_sample ( bigint_element_t *value0, unsigned int size ) {
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int bigint_shl_sample ( bigint_element_t *value0, unsigned int size ) {
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bigint_t ( size ) *value __attribute__ (( may_alias ))
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= ( ( void * ) value0 );
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bigint_shl ( value );
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return bigint_shl ( value );
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}
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void bigint_shr_sample ( bigint_element_t *value0, unsigned int size ) {
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int bigint_shr_sample ( bigint_element_t *value0, unsigned int size ) {
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bigint_t ( size ) *value __attribute__ (( may_alias ))
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= ( ( void * ) value0 );
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bigint_shr ( value );
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return bigint_shr ( value );
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}
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int bigint_is_zero_sample ( const bigint_element_t *value0,
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@@ -321,25 +321,31 @@ void bigint_mod_exp_sample ( const bigint_element_t *base0,
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*
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* @v value Big integer
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* @v expected Big integer expected result
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* @v bit Expected bit shifted out
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*/
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#define bigint_shl_ok( value, expected ) do { \
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#define bigint_shl_ok( value, expected, bit ) do { \
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static const uint8_t value_raw[] = value; \
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static const uint8_t expected_raw[] = expected; \
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uint8_t result_raw[ sizeof ( expected_raw ) ]; \
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unsigned int size = \
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bigint_required_size ( sizeof ( value_raw ) ); \
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unsigned int msb = ( 8 * sizeof ( value_raw ) ); \
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bigint_t ( size ) value_temp; \
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int out; \
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{} /* Fix emacs alignment */ \
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\
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bigint_init ( &value_temp, value_raw, sizeof ( value_raw ) ); \
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DBG ( "Shift left:\n" ); \
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DBG_HDA ( 0, &value_temp, sizeof ( value_temp ) ); \
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bigint_shl ( &value_temp ); \
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out = bigint_shl ( &value_temp ); \
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DBG_HDA ( 0, &value_temp, sizeof ( value_temp ) ); \
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bigint_done ( &value_temp, result_raw, sizeof ( result_raw ) ); \
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\
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ok ( memcmp ( result_raw, expected_raw, \
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sizeof ( result_raw ) ) == 0 ); \
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if ( sizeof ( result_raw ) < sizeof ( value_temp ) ) \
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out += bigint_bit_is_set ( &value_temp, msb ); \
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ok ( out == bit ); \
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} while ( 0 )
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/**
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@@ -347,25 +353,28 @@ void bigint_mod_exp_sample ( const bigint_element_t *base0,
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*
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* @v value Big integer
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* @v expected Big integer expected result
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* @v bit Expected bit shifted out
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*/
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#define bigint_shr_ok( value, expected ) do { \
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#define bigint_shr_ok( value, expected, bit ) do { \
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static const uint8_t value_raw[] = value; \
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static const uint8_t expected_raw[] = expected; \
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uint8_t result_raw[ sizeof ( expected_raw ) ]; \
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unsigned int size = \
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bigint_required_size ( sizeof ( value_raw ) ); \
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bigint_t ( size ) value_temp; \
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int out; \
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{} /* Fix emacs alignment */ \
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\
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bigint_init ( &value_temp, value_raw, sizeof ( value_raw ) ); \
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DBG ( "Shift right:\n" ); \
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DBG_HDA ( 0, &value_temp, sizeof ( value_temp ) ); \
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bigint_shr ( &value_temp ); \
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out = bigint_shr ( &value_temp ); \
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DBG_HDA ( 0, &value_temp, sizeof ( value_temp ) ); \
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bigint_done ( &value_temp, result_raw, sizeof ( result_raw ) ); \
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\
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ok ( memcmp ( result_raw, expected_raw, \
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sizeof ( result_raw ) ) == 0 ); \
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ok ( out == bit ); \
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} while ( 0 )
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/**
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@@ -896,13 +905,13 @@ static void bigint_test_exec ( void ) {
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0x7f, 0xcb, 0x94, 0x31, 0x1d, 0xbc,
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0x44, 0x1a ), 0 );
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bigint_shl_ok ( BIGINT ( 0xe0 ),
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BIGINT ( 0xc0 ) );
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BIGINT ( 0xc0 ), 1 );
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bigint_shl_ok ( BIGINT ( 0x43, 0x1d ),
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BIGINT ( 0x86, 0x3a ) );
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BIGINT ( 0x86, 0x3a ), 0 );
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bigint_shl_ok ( BIGINT ( 0xac, 0xed, 0x9b ),
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BIGINT ( 0x59, 0xdb, 0x36 ) );
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BIGINT ( 0x59, 0xdb, 0x36 ), 1 );
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bigint_shl_ok ( BIGINT ( 0x2c, 0xe8, 0x3a, 0x22 ),
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BIGINT ( 0x59, 0xd0, 0x74, 0x44 ) );
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BIGINT ( 0x59, 0xd0, 0x74, 0x44 ), 0 );
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bigint_shl_ok ( BIGINT ( 0x4e, 0x88, 0x4a, 0x05, 0x5e, 0x10, 0xee,
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0x5b, 0xc6, 0x40, 0x0e, 0x03, 0xd7, 0x0d,
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0x28, 0xa5, 0x55, 0xb2, 0x50, 0xef, 0x69,
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@@ -910,7 +919,19 @@ static void bigint_test_exec ( void ) {
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BIGINT ( 0x9d, 0x10, 0x94, 0x0a, 0xbc, 0x21, 0xdc,
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0xb7, 0x8c, 0x80, 0x1c, 0x07, 0xae, 0x1a,
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0x51, 0x4a, 0xab, 0x64, 0xa1, 0xde, 0xd3,
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0xa2, 0x3a ) );
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0xa2, 0x3a ), 0 );
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bigint_shl_ok ( BIGINT ( 0x84, 0x56, 0xaa, 0xb4, 0x23, 0xd4, 0x4e,
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0xea, 0x92, 0x34, 0x61, 0x11, 0x3e, 0x38,
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0x31, 0x8b ),
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BIGINT ( 0x08, 0xad, 0x55, 0x68, 0x47, 0xa8, 0x9d,
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0xd5, 0x24, 0x68, 0xc2, 0x22, 0x7c, 0x70,
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0x63, 0x16 ), 1 );
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bigint_shl_ok ( BIGINT ( 0x4a, 0x2b, 0x6b, 0x7c, 0xbf, 0x8a, 0x43,
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0x71, 0x96, 0xd6, 0x2f, 0x14, 0xa0, 0x2a,
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0xf8, 0x15 ),
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BIGINT ( 0x94, 0x56, 0xd6, 0xf9, 0x7f, 0x14, 0x86,
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0xe3, 0x2d, 0xac, 0x5e, 0x29, 0x40, 0x55,
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0xf0, 0x2a ), 0 );
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bigint_shl_ok ( BIGINT ( 0x07, 0x62, 0x78, 0x70, 0x2e, 0xd4, 0x41,
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0xaa, 0x9b, 0x50, 0xb1, 0x9a, 0x71, 0xf5,
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0x1c, 0x2f, 0xe7, 0x0d, 0xf1, 0x46, 0x57,
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@@ -948,15 +969,15 @@ static void bigint_test_exec ( void ) {
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0x10, 0xee, 0x09, 0xea, 0x09, 0x9a, 0xd6,
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0x49, 0x7c, 0x1e, 0xdb, 0xc7, 0x65, 0xa6,
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0x0e, 0xd1, 0xd2, 0x00, 0xb3, 0x41, 0xc9,
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0x3c, 0xbc ) );
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0x3c, 0xbc ), 0 );
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bigint_shr_ok ( BIGINT ( 0x8f ),
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BIGINT ( 0x47 ) );
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BIGINT ( 0x47 ), 1 );
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bigint_shr_ok ( BIGINT ( 0xaa, 0x1d ),
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BIGINT ( 0x55, 0x0e ) );
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BIGINT ( 0x55, 0x0e ), 1 );
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bigint_shr_ok ( BIGINT ( 0xf0, 0xbd, 0x68 ),
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BIGINT ( 0x78, 0x5e, 0xb4 ) );
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BIGINT ( 0x78, 0x5e, 0xb4 ), 0 );
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bigint_shr_ok ( BIGINT ( 0x33, 0xa0, 0x3d, 0x95 ),
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BIGINT ( 0x19, 0xd0, 0x1e, 0xca ) );
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BIGINT ( 0x19, 0xd0, 0x1e, 0xca ), 1 );
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bigint_shr_ok ( BIGINT ( 0xa1, 0xf4, 0xb9, 0x64, 0x91, 0x99, 0xa1,
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0xf4, 0xae, 0xeb, 0x71, 0x97, 0x1b, 0x71,
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0x09, 0x38, 0x3f, 0x8f, 0xc5, 0x3a, 0xb9,
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@@ -964,7 +985,19 @@ static void bigint_test_exec ( void ) {
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BIGINT ( 0x50, 0xfa, 0x5c, 0xb2, 0x48, 0xcc, 0xd0,
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0xfa, 0x57, 0x75, 0xb8, 0xcb, 0x8d, 0xb8,
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0x84, 0x9c, 0x1f, 0xc7, 0xe2, 0x9d, 0x5c,
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0xba, 0xca ) );
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0xba, 0xca ), 0 );
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bigint_shr_ok ( BIGINT ( 0xa4, 0x19, 0xbb, 0x93, 0x0b, 0x3f, 0x47,
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0x5b, 0xb4, 0xb5, 0x7d, 0x75, 0x42, 0x22,
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0xcc, 0xdf ),
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BIGINT ( 0x52, 0x0c, 0xdd, 0xc9, 0x85, 0x9f, 0xa3,
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0xad, 0xda, 0x5a, 0xbe, 0xba, 0xa1, 0x11,
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0x66, 0x6f ), 1 );
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bigint_shr_ok ( BIGINT ( 0x27, 0x7e, 0x8f, 0x60, 0x40, 0x93, 0x43,
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0xd6, 0x89, 0x3e, 0x40, 0x61, 0x9a, 0x04,
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0x4c, 0x02 ),
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BIGINT ( 0x13, 0xbf, 0x47, 0xb0, 0x20, 0x49, 0xa1,
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0xeb, 0x44, 0x9f, 0x20, 0x30, 0xcd, 0x02,
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0x26, 0x01 ), 0 );
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bigint_shr_ok ( BIGINT ( 0xc0, 0xb3, 0x78, 0x46, 0x69, 0x6e, 0x35,
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0x94, 0xed, 0x28, 0xdc, 0xfd, 0xf6, 0xdb,
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0x2d, 0x24, 0xcb, 0xa4, 0x6f, 0x0e, 0x58,
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@@ -1002,7 +1035,7 @@ static void bigint_test_exec ( void ) {
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0x10, 0x64, 0x55, 0x07, 0xec, 0xa8, 0xc7,
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0x46, 0xa8, 0x94, 0xb0, 0xf7, 0xa4, 0x57,
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0x1f, 0x72, 0x88, 0x5f, 0xed, 0x4d, 0xc9,
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0x59, 0xbb ) );
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0x59, 0xbb ), 1 );
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bigint_is_zero_ok ( BIGINT ( 0x9b ),
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0 );
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bigint_is_zero_ok ( BIGINT ( 0x5a, 0x9d ),
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