port-sparc/42273: SHA512_CTX struct not properly aligned

[jon%bullers.net@localhost]

>Number:         42273
>Category:       port-sparc
>Synopsis:       SHA512_CTX struct not properly aligned
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-sparc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   unknown
>Arrival-Date:   Fri Nov 06 02:00:00 +0000 2009
>Originator:     jon%bullers.net@localhost
>Release:        NetBSD current (as of Oct 30, 2009)
>Organization:
        
>Environment:
System: NetBSD sparc release built on amd64 system, kernel 5.99.15
        test code run in chroot area populated with a native built
        release from sources checked out on Oct 30, 2009.
Architecture: sparc
Machine: sparc
>Description:
        pkg_admin gets a bus error when downloading the vulnerabilities
        file.  gdb shows crash occured in SHA512_Final()  Small test
        case (near verbatim to example in man page) duplicates problem.

        martin@ tracked the test case down to an alignment problem in
        the SHA512_CTX struct allocation and usage.  pkg_admin code
        appears to allocate the struct exactly like the test case.
>How-To-Repeat:
        
#include <stdio.h>

#include <sys/types.h>
#include <sha1.h>

int main (int argc, char *argv[]) {
  SHA1_CTX ctx;
  uint8_t buf[27] = "abcdefghijklmnopqrstuvwxyz";
  uint8_t result[20];
  int i;

  SHA1Init (&ctx);
  SHA1Update (&ctx, buf, sizeof(buf));
  SHA1Final (result, &ctx);
  for (i = 0; i < 20; i++) {
    printf ("%2.2x", result[i]);
  }
  printf ("\n");
}

>Fix:
        martin@ said joerg@ has a fix for this ready, and to assign
        this PR to joerg (if pr-bug people don't do it for me first)