diff options
Diffstat (limited to 'internal/stupidgcm/prefer.go')
| -rw-r--r-- | internal/stupidgcm/prefer.go | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/internal/stupidgcm/prefer.go b/internal/stupidgcm/prefer.go index bacd56a..ffbaf58 100644 --- a/internal/stupidgcm/prefer.go +++ b/internal/stupidgcm/prefer.go @@ -6,7 +6,8 @@ import ( "golang.org/x/sys/cpu" ) -// PreferOpenSSL tells us if OpenSSL is faster than Go GCM on this machine. +// PreferOpenSSLAES256GCM tells us if OpenSSL AES-256-GCM is faster than Go stdlib +// on this machine. // // Go GCM is only faster if the CPU either: // @@ -16,7 +17,7 @@ import ( // // See https://github.com/rfjakob/gocryptfs/wiki/CPU-Benchmarks // for benchmarks. -func PreferOpenSSL() bool { +func PreferOpenSSLAES256GCM() bool { if BuiltWithoutOpenssl { return false } @@ -33,3 +34,18 @@ func PreferOpenSSL() bool { // OpenSSL is probably faster return true } + +// PreferOpenSSLXchacha20poly1305 returns true if OpenSSL Xchacha20poly1305 is +// faster than Go stdlib on this machine. +func PreferOpenSSLXchacha20poly1305() bool { + if BuiltWithoutOpenssl { + return false + } + // Go x/crypto has optimized assembly for amd64: + // https://github.com/golang/crypto/blob/master/chacha20poly1305/chacha20poly1305_amd64.s + if runtime.GOARCH == "amd64" { + return false + } + // On arm64 and arm, OpenSSL is faster. Probably everwhere else too. + return true +} |