53 lines
949 B
Go
53 lines
949 B
Go
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package sha1
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// llgo:skipall
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import (
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"hash"
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"unsafe"
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"github.com/goplus/llgo/c"
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"github.com/goplus/llgo/c/openssl"
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)
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// The blocksize of SHA-1 in bytes.
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const BlockSize = 64
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// The size of a SHA-1 checksum in bytes.
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const Size = 20
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type digest struct {
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ctx openssl.SHA_CTX
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}
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func (d *digest) Size() int { return Size }
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func (d *digest) BlockSize() int { return BlockSize }
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func (d *digest) Reset() {
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d.ctx.Init()
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}
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func (d *digest) Write(p []byte) (nn int, err error) {
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d.ctx.UpdateBytes(p)
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return len(p), nil
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}
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func (d *digest) Sum(in []byte) []byte {
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hash := (*[Size]byte)(c.Alloca(Size))
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d.ctx.Final((*byte)(unsafe.Pointer(hash)))
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return append(in, hash[:]...)
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}
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// New returns a new hash.Hash computing the SHA1 checksum.
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func New() hash.Hash {
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d := new(digest)
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d.ctx.Init()
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return d
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}
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// Sum returns the SHA-1 checksum of the data.
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func Sum(data []byte) (ret [Size]byte) {
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openssl.SHA1Bytes(data, &ret[0])
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return
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}
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