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author | Felix Lange <fjl@twurst.com> | 2014-10-23 21:01:27 +0800 |
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committer | Felix Lange <fjl@twurst.com> | 2014-10-23 21:01:27 +0800 |
commit | 69baa465ea69ae60eed802445cf0132b9eb69934 (patch) | |
tree | b09da7582b5c4850d4db13aee808f2fef2f97de0 /ethutil/rand.go | |
parent | 50fd46924900869e7210217c6a07979b544991c8 (diff) | |
parent | feef194829b07570e91873ed5d1e8cc51e8fa430 (diff) | |
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Merge eth-go repository into go-ethereum
mist, etheruem have been moved to cmd/
Diffstat (limited to 'ethutil/rand.go')
-rw-r--r-- | ethutil/rand.go | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/ethutil/rand.go b/ethutil/rand.go new file mode 100644 index 000000000..91dafec7e --- /dev/null +++ b/ethutil/rand.go @@ -0,0 +1,24 @@ +package ethutil + +import ( + "crypto/rand" + "encoding/binary" + "io" +) + +func randomUint64(r io.Reader) (uint64, error) { + b := make([]byte, 8) + n, err := r.Read(b) + if n != len(b) { + return 0, io.ErrShortBuffer + } + if err != nil { + return 0, err + } + return binary.BigEndian.Uint64(b), nil +} + +// RandomUint64 returns a cryptographically random uint64 value. +func RandomUint64() (uint64, error) { + return randomUint64(rand.Reader) +} |