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improve PEEK/POKE macros: better casts, don't multiply
 evaluate arguments; ok deraadt@

Upstream-ID: 9a1889e19647615ededbbabab89064843ba92d3e
This commit is contained in:
djm@openbsd.org 2015-11-11 04:56:39 +00:00 committed by Damien Miller
parent 7d4c7513a7
commit a7994b3f5a
1 changed files with 32 additions and 29 deletions
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61
sshbuf.h
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@ -1,4 +1,4 @@
/* $OpenBSD: sshbuf.h,v 1.4 2015/01/14 15:02:39 djm Exp $ */
/* $OpenBSD: sshbuf.h,v 1.5 2015/11/11 04:56:39 djm Exp $ */
/*
* Copyright (c) 2011 Damien Miller
*
@ -241,45 +241,48 @@ int sshbuf_b64tod(struct sshbuf *buf, const char *b64);
/* Macros for decoding/encoding integers */
#define PEEK_U64(p) \
(((u_int64_t)(((u_char *)(p))[0]) << 56) | \
((u_int64_t)(((u_char *)(p))[1]) << 48) | \
((u_int64_t)(((u_char *)(p))[2]) << 40) | \
((u_int64_t)(((u_char *)(p))[3]) << 32) | \
((u_int64_t)(((u_char *)(p))[4]) << 24) | \
((u_int64_t)(((u_char *)(p))[5]) << 16) | \
((u_int64_t)(((u_char *)(p))[6]) << 8) | \
(u_int64_t)(((u_char *)(p))[7]))
(((u_int64_t)(((const u_char *)(p))[0]) << 56) | \
((u_int64_t)(((const u_char *)(p))[1]) << 48) | \
((u_int64_t)(((const u_char *)(p))[2]) << 40) | \
((u_int64_t)(((const u_char *)(p))[3]) << 32) | \
((u_int64_t)(((const u_char *)(p))[4]) << 24) | \
((u_int64_t)(((const u_char *)(p))[5]) << 16) | \
((u_int64_t)(((const u_char *)(p))[6]) << 8) | \
(u_int64_t)(((const u_char *)(p))[7]))
#define PEEK_U32(p) \
(((u_int32_t)(((u_char *)(p))[0]) << 24) | \
((u_int32_t)(((u_char *)(p))[1]) << 16) | \
((u_int32_t)(((u_char *)(p))[2]) << 8) | \
(u_int32_t)(((u_char *)(p))[3]))
(((u_int32_t)(((const u_char *)(p))[0]) << 24) | \
((u_int32_t)(((const u_char *)(p))[1]) << 16) | \
((u_int32_t)(((const u_char *)(p))[2]) << 8) | \
(u_int32_t)(((const u_char *)(p))[3]))
#define PEEK_U16(p) \
(((u_int16_t)(((u_char *)(p))[0]) << 8) | \
(u_int16_t)(((u_char *)(p))[1]))
(((u_int16_t)(((const u_char *)(p))[0]) << 8) | \
(u_int16_t)(((const u_char *)(p))[1]))
#define POKE_U64(p, v) \
do { \
((u_char *)(p))[0] = (((u_int64_t)(v)) >> 56) & 0xff; \
((u_char *)(p))[1] = (((u_int64_t)(v)) >> 48) & 0xff; \
((u_char *)(p))[2] = (((u_int64_t)(v)) >> 40) & 0xff; \
((u_char *)(p))[3] = (((u_int64_t)(v)) >> 32) & 0xff; \
((u_char *)(p))[4] = (((u_int64_t)(v)) >> 24) & 0xff; \
((u_char *)(p))[5] = (((u_int64_t)(v)) >> 16) & 0xff; \
((u_char *)(p))[6] = (((u_int64_t)(v)) >> 8) & 0xff; \
((u_char *)(p))[7] = ((u_int64_t)(v)) & 0xff; \
const u_int64_t __v = (v); \
((u_char *)(p))[0] = (__v >> 56) & 0xff; \
((u_char *)(p))[1] = (__v >> 48) & 0xff; \
((u_char *)(p))[2] = (__v >> 40) & 0xff; \
((u_char *)(p))[3] = (__v >> 32) & 0xff; \
((u_char *)(p))[4] = (__v >> 24) & 0xff; \
((u_char *)(p))[5] = (__v >> 16) & 0xff; \
((u_char *)(p))[6] = (__v >> 8) & 0xff; \
((u_char *)(p))[7] = __v & 0xff; \
} while (0)
#define POKE_U32(p, v) \
do { \
((u_char *)(p))[0] = (((u_int64_t)(v)) >> 24) & 0xff; \
((u_char *)(p))[1] = (((u_int64_t)(v)) >> 16) & 0xff; \
((u_char *)(p))[2] = (((u_int64_t)(v)) >> 8) & 0xff; \
((u_char *)(p))[3] = ((u_int64_t)(v)) & 0xff; \
const u_int32_t __v = (v); \
((u_char *)(p))[0] = (__v >> 24) & 0xff; \
((u_char *)(p))[1] = (__v >> 16) & 0xff; \
((u_char *)(p))[2] = (__v >> 8) & 0xff; \
((u_char *)(p))[3] = __v & 0xff; \
} while (0)
#define POKE_U16(p, v) \
do { \
((u_char *)(p))[0] = (((u_int64_t)(v)) >> 8) & 0xff; \
((u_char *)(p))[1] = ((u_int64_t)(v)) & 0xff; \
const u_int16_t __v = (v); \
((u_char *)(p))[0] = (__v >> 8) & 0xff; \
((u_char *)(p))[1] = __v & 0xff; \
} while (0)
/* Internal definitions follow. Exposed for regress tests */