* ext/digest/sha2/sha2.c (SHA256_Update, SHA512_Update): avoid Bus

Error caused by unalignment access on Sparc-Solaris (and possibly on
  other similar environment.) This patch just do memcpy always instead
  of checking architecture. I see no perf drop on my 64bit env. For
  more details, see #4320.

* test/digest/test_digest.rb: add test for unalignment access.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32546 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,13 @@
+Fri Jul 15 09:10:41 2011  Hiroshi Nakamura  <nahi@ruby-lang.org>
+
+	* ext/digest/sha2/sha2.c (SHA256_Update, SHA512_Update): avoid Bus
+	  Error caused by unalignment access on Sparc-Solaris (and possibly on
+	  other similar environment.) This patch just do memcpy always instead
+	  of checking architecture. I see no perf drop on my 64bit env. For
+	  more details, see #4320.
+
+	* test/digest/test_digest.rb: add test for unalignment access.
+
 Fri Jul 15 01:51:25 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* regint.h (PLATFORM_UNALIGNED_WORD_ACCESS): Power PC does not

ext/digest/sha2/sha2.c

@@ -559,7 +559,8 @@ void SHA256_Update(SHA256_CTX* context, const sha2_byte *data, size_t len) {
 	}
 	while (len >= SHA256_BLOCK_LENGTH) {
 		/* Process as many complete blocks as we can */
-		SHA256_Transform(context, (sha2_word32*)data);
+		MEMCPY_BCOPY(context->buffer, data, SHA256_BLOCK_LENGTH);
+		SHA256_Transform(context, (sha2_word32*)context->buffer);
 		context->bitcount += SHA256_BLOCK_LENGTH << 3;
 		len -= SHA256_BLOCK_LENGTH;
 		data += SHA256_BLOCK_LENGTH;
@@ -880,7 +881,8 @@ void SHA512_Update(SHA512_CTX* context, const sha2_byte *data, size_t len) {
 	}
 	while (len >= SHA512_BLOCK_LENGTH) {
 		/* Process as many complete blocks as we can */
-		SHA512_Transform(context, (sha2_word64*)data);
+		MEMCPY_BCOPY(context->buffer, data, SHA512_BLOCK_LENGTH);
+		SHA512_Transform(context, (sha2_word64*)context->buffer);
 		ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
 		len -= SHA512_BLOCK_LENGTH;
 		data += SHA512_BLOCK_LENGTH;

test/digest/test_digest.rb

@@ -78,6 +78,15 @@ module TestDigest
     }
   end
 
+  def test_alignment
+    md = self.class::ALGO.new
+    assert_nothing_raised('#4320') {
+      md.update('a' * 97)
+      md.update('a' * 97)
+      md.hexdigest
+    }
+  end
+
   class TestMD5 < Test::Unit::TestCase
     include TestDigest
     ALGO = Digest::MD5