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authorUlrich Drepper <drepper@redhat.com>2001-12-14 06:33:57 +0000
committerUlrich Drepper <drepper@redhat.com>2001-12-14 06:33:57 +0000
commit0838e0b9265a9ec55d1a11fa3f32616ec7dbf74c (patch)
tree8ac383e28a651068af6baf20d618568ed6581081 /crypt/md5.c
parent7afc594790a145ba485198e76baa2e984f704f81 (diff)
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Update.
2001-12-13 Ulrich Drepper <drepper@redhat.com> * crypt/md5.c (md5_process_bytes): Correct handling of alignment. Patch by Eric Sharkey <sharkey@netrics.com>. * crypt/md5test.c (main): Add test for multiple calls to __md5_process_bytes to itererate over input string.
Diffstat (limited to 'crypt/md5.c')
-rw-r--r--crypt/md5.c34
1 files changed, 24 insertions, 10 deletions
diff --git a/crypt/md5.c b/crypt/md5.c
index d6b801307e..04bce5ab37 100644
--- a/crypt/md5.c
+++ b/crypt/md5.c
@@ -1,6 +1,6 @@
/* Functions to compute MD5 message digest of files or memory blocks.
according to the definition of MD5 in RFC 1321 from April 1992.
- Copyright (C) 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1995,1996,1997,1999,2000,2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -217,8 +217,6 @@ md5_process_bytes (buffer, len, ctx)
size_t len;
struct md5_ctx *ctx;
{
- //const void aligned_buffer = buffer;
-
/* When we already have some bits in our internal buffer concatenate
both inputs first. */
if (ctx->buflen != 0)
@@ -226,9 +224,6 @@ md5_process_bytes (buffer, len, ctx)
size_t left_over = ctx->buflen;
size_t add = 128 - left_over > len ? len : 128 - left_over;
- /* Only put full words in the buffer. */
- add -= add % __alignof__ (md5_uint32);
-
memcpy (&ctx->buffer[left_over], buffer, add);
ctx->buflen += add;
@@ -247,11 +242,30 @@ md5_process_bytes (buffer, len, ctx)
}
/* Process available complete blocks. */
- if (len > 64)
+ if (len >= 64)
{
- md5_process_block (buffer, len & ~63, ctx);
- buffer = (const char *) buffer + (len & ~63);
- len &= 63;
+#if !_STRING_ARCH_unaligned
+/* To check alignment gcc has an appropriate operator. Other
+ compilers don't. */
+# if __GNUC__ >= 2
+# define UNALIGNED_P(p) (((md5_uintptr) p) % __alignof__ (md5_uint32) != 0)
+# else
+# define UNALIGNED_P(p) (((md5_uintptr) p) % sizeof (md5_uint32) != 0)
+# endif
+ if (UNALIGNED_P (buffer))
+ while (len > 64)
+ {
+ md5_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx);
+ buffer = (const char *) buffer + 64;
+ len -= 64;
+ }
+ else
+#endif
+ {
+ md5_process_block (buffer, len & ~63, ctx);
+ buffer = (const char *) buffer + (len & ~63);
+ len &= 63;
+ }
}
/* Move remaining bytes in internal buffer. */