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author | Steve Ellcey <sje@cup.hp.com> | 2011-08-12 16:06:57 +0000 |
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committer | Steve Ellcey <sje@gcc.gnu.org> | 2011-08-12 16:06:57 +0000 |
commit | c49b1a299e4be73819e3f12394eeb2681057e8fc (patch) | |
tree | 8fa236a1f2f2f08b6de61f3772bd68a38b31f57f /libiberty/md5.c | |
parent | e02d979a34621de7e71c821fcf4cfb5cca511e72 (diff) | |
download | gcc-c49b1a299e4be73819e3f12394eeb2681057e8fc.zip gcc-c49b1a299e4be73819e3f12394eeb2681057e8fc.tar.gz gcc-c49b1a299e4be73819e3f12394eeb2681057e8fc.tar.bz2 |
md5.c (md5_read_ctx): Handle mis-aligned resbuf pointer.
2011-08-12 Steve Ellcey <sje@cup.hp.com>
* md5.c (md5_read_ctx): Handle mis-aligned resbuf pointer.
From-SVN: r177700
Diffstat (limited to 'libiberty/md5.c')
-rw-r--r-- | libiberty/md5.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/libiberty/md5.c b/libiberty/md5.c index 9de9d88..11920e1 100644 --- a/libiberty/md5.c +++ b/libiberty/md5.c @@ -76,15 +76,19 @@ md5_init_ctx (struct md5_ctx *ctx) /* Put result from CTX in first 16 bytes following RESBUF. The result must be in little endian byte order. - IMPORTANT: On some systems it is required that RESBUF is correctly - aligned for a 32 bits value. */ + IMPORTANT: RESBUF may not be aligned as strongly as MD5_UNIT32 so we + put things in a local (aligned) buffer first, then memcpy into RESBUF. */ void * md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) { - ((md5_uint32 *) resbuf)[0] = SWAP (ctx->A); - ((md5_uint32 *) resbuf)[1] = SWAP (ctx->B); - ((md5_uint32 *) resbuf)[2] = SWAP (ctx->C); - ((md5_uint32 *) resbuf)[3] = SWAP (ctx->D); + md5_uint32 buffer[4]; + + buffer[0] = SWAP (ctx->A); + buffer[1] = SWAP (ctx->B); + buffer[2] = SWAP (ctx->C); + buffer[3] = SWAP (ctx->D); + + memcpy (resbuf, buffer, 16); return resbuf; } |