30 lines
759 B
Go
30 lines
759 B
Go
package handshake
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import "encoding/binary"
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func decodeCipherSuiteIDs(buf []byte) ([]uint16, error) {
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if len(buf) < 2 {
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return nil, errBufferTooSmall
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}
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cipherSuitesCount := int(binary.BigEndian.Uint16(buf[0:])) / 2
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rtrn := make([]uint16, cipherSuitesCount)
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for i := 0; i < cipherSuitesCount; i++ {
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if len(buf) < (i*2 + 4) {
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return nil, errBufferTooSmall
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}
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rtrn[i] = binary.BigEndian.Uint16(buf[(i*2)+2:])
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}
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return rtrn, nil
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}
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func encodeCipherSuiteIDs(cipherSuiteIDs []uint16) []byte {
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out := []byte{0x00, 0x00}
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binary.BigEndian.PutUint16(out[len(out)-2:], uint16(len(cipherSuiteIDs)*2))
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for _, id := range cipherSuiteIDs {
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out = append(out, []byte{0x00, 0x00}...)
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binary.BigEndian.PutUint16(out[len(out)-2:], id)
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}
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return out
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}
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