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4 Commits
Author SHA1 Message Date
Jungho Ahn 81bf7719a6 x/crypto/poly1305: fix memory alignment fault in ARM 
The current ARM implementation assumes that the input message
  is memory aligned and so it can cause alignment fault when it
  is not enabled. Also it may generate incorrect outputs in ARMv5.

  This change fixes this issue by temporarily copying the input
  to a local aligned space. Although there may be a better way
  to handle unaligned access, this would be a safe way in all
  ARM versions.

  This change also added a test and benchmarks with unaligned
  data. The benchmark result on RasberryPI 2 is

  Benchmark64  2000000         812 ns/op    78.81 MB/s
  Benchmark1K   200000        7809 ns/op   131.12 MB/s
  Benchmark64Unaligned   2000000         967 ns/op    66.13 MB/s
  Benchmark1KUnaligned    200000       10316 ns/op    99.26 MB/s

Change-Id: I189cc1b7bb6c67a04c9877271fb27326f2896e82
Reviewed-on: https://go-review.googlesource.com/12797
Reviewed-by: Adam Langley <agl@golang.org>
 2015-08-19 00:13:40 +00:00
Alexander Neumann f6a608df62 poly1305/arm: allow building with Go 1.3 
This is the same as https://golang.org/cl/154120043

Since the file textflag.h is not available on Go 1.3, the macros defined
in textflag.h are replaced with their respective value.

Fixes golang/go#11448

Change-Id: I0d4aed67b7afe50d8e4e88915edd2cefeac4cc96
Reviewed-on: https://go-review.googlesource.com/12033
Reviewed-by: Ian Lance Taylor <iant@golang.org>
 2015-07-11 23:27:05 +00:00
Joel Sing 644910e6da poly1305: fix compilation on arm with go tip 
Fix compilation of poly1305 using go tip - it currently fails with:

./poly1305_arm.s:124: cannot reference SP without a symbol
./poly1305_arm.s:161: cannot reference SP without a symbol
./poly1305_arm.s:162: cannot reference SP without a symbol
asm: asm: assembly of ./poly1305_arm.s failed

Change-Id: I797dcf3641cc881b6cc192034b693ccf58317987
Reviewed-on: https://go-review.googlesource.com/10307
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
 2015-05-21 15:47:07 +00:00
Jungho Ahn 4d48e5fa3d x/crypto/poly1305: add ARM assembly 
This change adds ARMv6 assembly implementation. The referenced assembly code was
  the public domain source by Andrew Moon in https://github.com/floodyberry/poly1305-opt/blob/master/app/extensions/poly1305/poly1305_armv6-32.inc.
  The author has confirmed that it's ok to put it under the Go license.

  Benchmark results on Raspberry Pi (ARMv6-compatible processor rev 7),
   o Without ARMv6 assembly
     Benchmark1K      5000      287177 ns/op     3.57 MB/s
     Benchmark64     50000       38880 ns/op     1.65 MB/s

   o With ARMv6 assembly
     Benchmark1K    100000       15964 ns/op    64.14 MB/s
     Benchmark64   1000000        1472 ns/op    43.46 MB/s

Change-Id: Iea5b0b831ac097cc6d477a8fccbf0ddb4819724c
Reviewed-on: https://go-review.googlesource.com/9765
Reviewed-by: Adam Langley <agl@golang.org>
Run-TryBot: Adam Langley <agl@golang.org>
 2015-05-14 21:10:51 +00:00