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RSAExtensions is an RSA algorithm enhancement extension for .NET Core. It adds some extension methods to RSA objects. The supported platforms are as follows:
| TargetFramework | Support version |
|---|---|
| .NET Core | >=3.0 |
| .NET Standard | >=2.1 |
Features：
- Provides key import and export in the XML format that .NET Frameworks have
- Provide support for PKCS # 1, PKCS # 8 PEM format import and export
- Provide unified import and export of PKCS # 1, PKCS # 8, XML format
- Provides support for big data encryption
Full range coverage test to ensure accuracy of each API.
Install from nuget
dotnet add package RSAExtensionsusing System.Security.Cryptography;
var rsa=RSA.Create();rsa.ExportPrivateKey(RSAKeyType.Pkcs1);
rsa.ExportPublicKey(RSAKeyType.Pkcs1);Private Key Output：
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
rsa.ExportPrivateKey(RSAKeyType.Pkcs1,true);
rsa.ExportPublicKey(RSAKeyType.Pkcs1,true);Private Key Output：
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
rsa.ExportPrivateKey(RSAKeyType.Pkcs8);
rsa.ExportPublicKey(RSAKeyType.Pkcs8);Private Key Output：
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
rsa.ExportPrivateKey(RSAKeyType.Pkcs8, true);
rsa.ExportPublicKey(RSAKeyType.Pkcs8, true);Private Key Output：
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
rsa.ExportPrivateKey(RSAKeyType.Xml);
rsa.ExportPublicKey(RSAKeyType.Xml);Private Key Output：
<RSAKeyValue>
<Modulus>09Hvw+dbHzi8x+9A1b2S0/128nA61ZyiaazJcDCUety4yHg0cdp5NOnyH35njYR4u2XO5l4GptwzJQfkEzCNoAniofBkb/WMQjvUhJ30eVpa7p/aq+4cgnMYuwYRCOLAB3jpldzIvii1+BOr3oLeT+1blK9f8u3T5liIxV3DBFxEWbnhQWHMgYXpDBIV9cjVhLYZLznefoWZ8N9bVdg1aucgYSWiPbURdfZusyS2fUJgiDLu63KQw8Bhc9cIMnUh6fq2UIBMk1mg/zuKyuMzCM8FX/VvleXJwS11LAgkEhtkOKQXo2xB65+zxPAUl0mKWGKSP9gY8p0+cav4nFCSLQ==</Modulus>
<Exponent>AQAB</Exponent>
<P>6ZEU55sugjc/qcPW0u0fSxy5tJYI+8tFsKfw/5AAm4pq2SVfDQHkRODlv5Zr8DnFQz7WN2L7FL6f11qdIjO4/dF9oo5YlD+jlmTOdaZovNLT0w0KGnN3ChFnnyxyNSG33sxlwgUrBppY2W4Sh0rzNQ4VIBhGes6dHxuMg0hWCKM=</P>
<Q>6ComYZkP5fJrT5tWNSTkb+UGyUwxquXWAgZB8GCkAzrc5t3QgPe+1W0bUSJOVddPX6mxx6yaM+ZMFc5pwdcyxYJ90+T/m2NNviMOC2fHB457OWr4HO0DloYHlWbniXfkOLGrWHshcbIEwbsYWnVYF3mOF2b/xDuDUB57B71Flu8=</Q>
<DP>k9guL1zfV7W5KrC4btOCF32bX2AJV7kX5/amal6ww8QeVk19mTI1WBQz2c5RjMJEx4gi+PRCkqMHcr388QVkd+X/bMJF97FAz5YHyhkH+15IjzOVzaCBHXJe8TalJFSvmuwvDV1QGuHgk+FFATbENDUx0hsLofjfJC3AB+nl65k=</DP>
<DQ>v80qvlDUuJUpILBlbSxYaTTeAWmoUtbkkfGXgj5k4aI8o6K3QgTrLKmh+sqLyxFBKvgnvp2TG7N0QkOwTYs7D795spgqr7Y/oQiW7sdCv7RviwUbi9Int7BtDXnhaUmaS1hFBalb/PEkSuUF/p2ZNHOg9yaJwRWlq4gy/jbZChM=</DQ>
<InverseQ>EydINmQ+aX8+2W7ZxU66P+0XSYsA2M/m7eF0cn5B+N3E2TOYgwunWqjPksyprEtNlP/puf7li/g8G5j3fQ0Xy/KrVwR2emcvCZMqpjzkYhSn9KcVHUVJg/LHb7BDVx/uSZwj9Ok2qDX73PSa91DEsIPiKPQjkVw1QJJ19wlJMiQ=</InverseQ>
<D>MzwYbp5LYCXtI78vQ4PzO+uXFdUnpfuZHU55+vUFNSKmX3cT2GYr4yyjMBL3ITflrA5YGUis+zdP96kM9cdMumUpuFnZMWuHXY3zPZCnTaMZU5a+4c9afgMw/CvfevK92BDbDzC0LarTOQopDE1DULns6O3ym2QDWTgY/QRM44StLMEaLjNdVhLS3lMZJPrMCtk1k044RStUkL/7yiLMUYtXV+Lpy/08dyHWdXfBcakusKw8EEZZ53skFeR6mkWT51wyKmBFf7D6rfUC+e282i8OGayu79zXvA0UutmUGa1Q9eAP8qsBrc/i++qa/X3JnfBrFyEwQBfQV3kiOM3T0Q==</D>
</RSAKeyValue>
rsa.ImportPrivateKey(RSAKeyType.Pkcs1, "<privateKey>");
rsa.ImportPublicKey(RSAKeyType.Pkcs1, "<publicKey>"); rsa.ImportPrivateKey(RSAKeyType.Pkcs1, "<privateKey>",true);
rsa.ImportPublicKey(RSAKeyType.Pkcs1, "<publicKey>",true); rsa.ImportPrivateKey(RSAKeyType.Pkcs8, "<privateKey>");
rsa.ImportPublicKey(RSAKeyType.Pkcs8, "<publicKey>"); rsa.ImportPrivateKey(RSAKeyType.Pkcs8, "<privateKey>",true);
rsa.ImportPublicKey(RSAKeyType.Pkcs8, "<publicKey>",true); rsa.ImportPrivateKey(RSAKeyType.Xml, "<privateKey>");
rsa.ImportPublicKey(RSAKeyType.Xml, "<publicKey>"); The "length" referred to below is the length in bytes.
The length of the encrypted data of the RSA algorithm is based on different padding algorithms. Generally, it supports data of equal Key modulus length. If the length exceeds this length, the data will be split and encrypted.
Key modulus length=KeySize/8
The following are the supported encrypted data lengths of the padding algorithms supported by .NET Core that I tested and sorted out:
| Padding | Minimum KeySize | Maximum encrypted data length |
|---|---|---|
| Pkcs1 | 512 | modulus length-11 |
| OaepSHA1 | 512 | modulus length-42 |
| OaepSHA256 | 1024 | modulus length-66 |
| OaepSHA384 | 1024 | modulus length-98 |
| OaepSHA512 | 2048 | modulus length-130 |
This component has been packaged with segmented encryption. You do not need to care about the relationship between the data length and the module length. The usage method is as follows:
var encrypt = rsa.EncryptBigData(data, <Padding>);
var decrypt = rsa.DecryptBigData(encrypt, <Padding>);