[src/trunk]: src/crypto/external/bsd/netpgp/dist/src/netpgpverify Avoid undef...

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/cc60282393d5
branches:  trunk
changeset: 991688:cc60282393d5
user:      kamil <kamil%NetBSD.org@localhost>
date:      Thu Jul 26 00:26:45 2018 +0000

description:
Avoid undefined behavior in netpgpverify

Do not change the signedness bit with a left shift operation.
Cast to unsigned integer to prevent this.

pgpsum.c:187:18, left shift of 130 by 24 places cannot be represented in type 'int'

Detected with micro-UBSan in the user mode.

diffstat:

 crypto/external/bsd/netpgp/dist/src/netpgpverify/pgpsum.c |  4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diffs (21 lines):

diff -r 307827e77456 -r cc60282393d5 crypto/external/bsd/netpgp/dist/src/netpgpverify/pgpsum.c
--- a/crypto/external/bsd/netpgp/dist/src/netpgpverify/pgpsum.c Thu Jul 26 00:20:41 2018 +0000
+++ b/crypto/external/bsd/netpgp/dist/src/netpgpverify/pgpsum.c Thu Jul 26 00:26:45 2018 +0000
@@ -175,7 +175,7 @@
        u16     u;
 
        u.i16 = in;
-       return (u.i8[0] << 8) | u.i8[1];
+       return ((uint16_t)u.i8[0] << 8) | u.i8[1];
 }
 
 static inline uint32_t
@@ -184,7 +184,7 @@
        u32     u;
 
        u.i32 = in;
-       return (u.i8[0] << 24) | (u.i8[1] << 16) | (u.i8[2] << 8) | u.i8[3];
+       return ((uint32_t)u.i8[0] << 24) | (u.i8[1] << 16) | (u.i8[2] << 8) | u.i8[3];
 }
 
 static inline int