Object Digest

Information Digest Object

inheritance relationship

member attribute

size

Integer, query the number of digest bytes of the current message digest algorithm

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readonly Integer Digest.size;

member function

update

Update binary digest information

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Digest Digest.update(Buffer data);

Call parameters:

• data:Buffer, the binary data block

return result:

• Digest, returns the information summary object itself

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digest

Compute and return a summary

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Value Digest.digest(String codec = "buffer");

Call parameters:

• codec: String, specifies the encoding format, allowed values ​​are: "buffer", "hex", "base32", "base58", "base64", "utf8", oriconvCharacter sets supported by the module

return result:

• Value, returns a digest representation of the specified encoding

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sign

Sign and return digest

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Buffer Digest.sign(PKey key,
    Object opts = {}) async;

Call parameters:

• key:PKey, the private key to sign
• opts: Object, specifies signature options

return result:

• Buffer, returns the signed data

opts supports the following parameters:

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{
    alg: 0， 指定签名的 hash 算法， 仅在 RSA 时有效， 缺省为 0. 支持算法: 0 = NONE,
    1 = MD5,
    2 = SHA1,
    3 = SHA224,
    4 = SHA256,
    5 = SHA384,
    6 = SHA512,
    7 = RIPEMD160
    to: pk,
    指定验证方公钥， 仅在 ecsdsa 或 sm2 时有效
}

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verify

Verify that the signatures are consistent

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Boolean Digest.verify(PKey key,
    Buffer sign,
    Object opts = {}) async;

Call parameters:

• key:PKey, to verify the signed public key
• sign:Buffer, specifying the signature to verify
• opts: Object, specifies the authentication options

return result:

• Boolean, returns the verified result

opts supports the following parameters:

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{
    alg: 0， 指定签名的 hash 算法， 仅在 RSA 时有效， 缺省为 0. 支持算法: 0 = NONE,
    1 = MD5,
    2 = SHA1,
    3 = SHA224,
    4 = SHA256,
    5 = SHA384,
    6 = SHA512,
    7 = RIPEMD160
    to: pk,
    指定验证方公钥， 仅在 ecsdsa 或 sm2 时有效
}

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toString

Return the string representation of the object, generally return "[Native Object]", the object can be reimplemented according to its own characteristics

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String Digest.toString();

return result:

• String, returns a string representation of the object

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toJSON

Returns the JSON format representation of the object, generally returns a collection of readable properties defined by the object

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Value Digest.toJSON(String key = "");

Call parameters:

• key: String, not used

return result:

• Value, which returns a JSON-serializable value