31 lines
514 B
Go
31 lines
514 B
Go
package signature
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import (
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"errors"
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"sync"
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)
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var bytesPool = sync.Pool{
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New: func() interface{} {
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b := make([]byte, 5<<20)
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return &b
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},
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}
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func dataForSignature(src DataSource) ([]byte, error) {
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if src == nil {
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return nil, errors.New("nil source")
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}
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buf := *bytesPool.Get().(*[]byte)
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if size := src.SignedDataSize(); size < 0 {
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return nil, errors.New("negative length")
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} else if size <= cap(buf) {
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buf = buf[:size]
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} else {
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buf = make([]byte, size)
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}
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return src.ReadSignedData(buf)
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}
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