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Fix bug in mpi_set_bit

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Manuel Pégourié-Gonnard 2013-12-04 18:05:29 +01:00
parent a0179b8c4a
commit 9a4a5ac4de
3 changed files with 9 additions and 1 deletions
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1
ChangeLog
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@ -15,6 +15,7 @@ Changes
* Split off curves from ecp.c into ecp_curves.c
Bugfix
* Fixed bug in mpi_set_bit() on platforms where t_uint is wider than int
* Fixed X.509 hostname comparison (with non-regular characters)
* SSL now gracefully handles missing RNG
* Missing defines / cases for RSA_PSK key exchange

3
library/bignum.c
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@ -280,7 +280,8 @@ int mpi_set_bit( mpi *X, size_t pos, unsigned char val )
MPI_CHK( mpi_grow( X, off + 1 ) );
}
X->p[off] = ( X->p[off] & ~( 0x01 << idx ) ) | ( val << idx );
X->p[off] &= ~( (t_uint) 0x01 << idx );
X->p[off] |= (t_uint) val << idx;
cleanup:

6
tests/suites/test_suite_mpi.data
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@ -665,6 +665,12 @@ mpi_set_bit:10:"49979687":80:0:10:"49979687"
Test bit set (Add above existing limbs with a 1)
mpi_set_bit:10:"49979687":80:1:10:"1208925819614629224685863"
Test bit set (Bit index larger than 31 with a 0)
mpi_set_bit:16:"FFFFFFFFFFFFFFFF":32:0:16:"FFFFFFFEFFFFFFFF"
Test bit set (Bit index larger than 31 with a 1)
mpi_set_bit:16:"00":32:1:16:"0100000000"
MPI Selftest
depends_on:POLARSSL_SELF_TEST
mpi_selftest: