# Functions
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*sm2密文转asn.1编码格式
*sm2密文结构如下:
* x
* y
* hash
* CipherText
*/.
sm2密文asn.1编码格式转C1|C3|C2拼接格式
*/.
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sm2解密，解析asn.1编码格式的密文内容
*/.
* sm2密文结构如下:
* x
* y
* hash
* CipherText
*/.
sm2加密，返回asn.1编码格式的密文内容
*/.
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KeyExchangeA 协商第二部，用户A调用，返回共享密钥k.
**************************Key agreement algorithm**************************// KeyExchangeB 协商第二部，用户B调用， 返回共享密钥k.
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****************************************************************************//.
*
* 将 Asn1的常见签名结果转换成big.Int输出格式
**/.
*
* 将 big.Int的签名结果转换成Asn1的常见输出格式
**/.
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za, err := ZA(pub, uid)
if err != nil {
return
}
e, err := msgHash(za, msg)
hash=e.getBytes()
*/.
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ZA = H256(ENTLA || IDA || a || b || xG || yG || xA || yA).