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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：
MIIEpAIBAAKCAQEAv4pVuabfkk1NxEpIz4GYMpG69hyJDXAFJAIuUP3qCIhq081KRwrWW 0qQZp6MMTHHA/O rHHTR6vfGBOo6yxcs9c4QCbnt/RhQ bOmLizTJURiFrbgFU9q8dlpJ8OaoSBE3M2dY6wMhck vEGSr1w7Fm wH IPPyKfNynPDYs3rKzNyHJfre62Vf23tB/Zd 7UC0PAEing7uERZdrRfloy95v8o2kVBIk4v2YUjEpLaMDbytBo wMbyTHqsHtJKlCfxAZ sb7VKQx8JlNEMals4k8gwjCTtoum34jgscb7CQ1aleAskTrQO2zkQINssrN/sr3WlEZ4ZdNXXVb/JhQIDAQABAoIBAF5o4i47CXIEdnNtJgxZ1Vn/qMbMc VStMX16Tx0m1mPXBB/3L 9oMD42l4xtU66f2XeiOfanuDtYhQNKFXWtjRf72jcMtiRe6V5dsrFmQMJbq6OpHQ5ZdadpBjmpSKLKIxEiNdKl/UUDUW/7Q12tmK524eXiNpXQ6LX40NmF3oHDwMb7ZGnynFBKdA4ZDZWcVpL1eGY9xTJnpAmLRsI4UXBVeSIKZYZAo4I4FhvWr/mkESiWhBGCGrFMQB75t1x6wTqHPBoWjo9HJrSW66tbEeIdwNbpxzlaYqcOMd Uk6P38lCE5J6rxRCMXjvehEqZmAYswfMNS5a5o2a/xEHElUCgYEA4NTyPS aQDP9Vu8fpsbCyfxiPLSam9JUJm2ON3/0C6uomYVHnL72AgM7srmmQB4cA6bbvscjB5oB504bQ73ppi56SFnvjhQckCAtU0VPTtOVSUYBOQGvhCY0Lr AJHCKYCVEZEWdGFObVTApA QXwHlpheSe fuMZkIjEiuZX2cCgYEA2hfoopk1b6RNbBvp9X1TfiZYW/x6Jrs9ebr3z08lawtLeSJAXPS37XqYgVUTMXxs7mcIP7AHmGuFlu9nOA6sVF1E2C1I3f6YMH8OaZCiH0/e3swqyTkYyiHBmCnh2lWGVyf8jK OF0Y9KI omGiyFiPTco6VS6Q16Ozd/NJK DMCgYEAtjB5V9GiSpKWoYLGgEwifrFRHeYwP0LSRA2VKC48odRpnHYfUMqB6aGbF7pPGTgM9XyaJ1 RaFCJaFmnyF413x9cohKXB gOOVCJyiepG7RjDex3gy11gD3BHXy7J0w3JbAtWp/6rELb5c1P/0IvaR45v3FCzknkPN0tNEU2VNMCgYEAtlOIm 6jurrMMxY/CImGtI7QDc7MO/cLFOqW44xSRuRBa3qT/mJkJbf5KR57lkJkOwaN4diC8QzquN1aGIZD0Z/Lv0JUiaqfhuOho VTdAPs2awsFN T9uAzncdd1o7raY 3VdIqYxDIblFzbD8Squm2iy3iaENXAmyLxSH1pPsCgYAXZincMY50iTmF9qYaS9xs44d3riKRQpty97W igW5MqFMmmajfy8QShVliG1cU10Hsvz0hAZ6SK5gl Zp6CHrveuEr69 aee6Xjp3hiJKCEiId9ahCpr8EBPWYTi22azBzgGiXseqMEI2UR9SS6K7OZ2TRNwWOERuBsabERZQhQ==
rsa.ExportPrivateKey(RSAKeyType.Pkcs1,true);
rsa.ExportPublicKey(RSAKeyType.Pkcs1,true);Private Key Output：
-----BEGIN RSA PRIVATE KEY-----
MIIEpAIBAAKCAQEAtffhsp2hu1b0isDlYZ2UHd5NPLGHJYwDzWFM29EiXZq3pHDY
CFNF5jJ h8U4e10e9XDvVF6X02OLQVjVCZVlikRe5VmKGOU azL5ojg1MbLOqEJr
fd3f/vxcZ4sCIxdWNgHefPixneNldIULBor9n4IlB5so54YdPZLXxLwSXJczTbeG
LuMRw2plKZpp8hLZTLeR42g0aIBUbBanDZuoP2ztjFthUTf E7PbI4hmFhL4nszO
/9KuJEvlnLtQF9shHZ5ERvgHXFbHpM9e1nz4Yr eaTWxVF6vNBicKFrTgMNtYtS/
6x004yVmpXdeHUBDwerIJwS7AJLXX0BC4mlDGQIDAQABAoIBADxo75 5nyCvjH2n
7j7K7oo/68pTcXdwlS6Qt9BeDJegrojEAaQ56QG0D7eJLOgfkRCQjpOm16aQ7IEk
OY118IDHk 12HVeIe4FhKejF2jsGjn7jlgXyK9Pd dtSFcKKk89YLYG1mlm9TUgy
hueEKxDSRvLQevLp3jk7z6/7c kSpPUrsreWyq6qP lwfmPa6k6uAwEpHKfGKmCC
Sj3vnC2jBfG89RZFhvB9VUXqDs1Yppi1anFlymB7eJMOu33SG9hqHK/AwJpv1qM3
ONebjyZ2rrrCxhMuR3luDdgACHpINOyeb8zkR0v 24aqHGLs3V31bGkYqITJXSkm
udNHM2UCgYEA8cpokD3GMolB8npIDw7DcwoAW9J3rD44EDHpak H wNbUxHzcrwc
ylEcIkbM5hiIyEsmkWVwsqM/UQ9v Fl/h6AlqPE4ai4D/pbfWnlPxPuTGzm/wpWR
sXcZJ EAWn6MR 6fm1KeAsCRs8rBL5OKhFRXOzwdmulVg8jNGq4ijycCgYEAwKl7
gmSj7zlY0ATesawZVM3cSmV3rp5uCN61jZkY1zzOw4uiD0dDyCIhzYJc9fp2pUSf
plNYv58 StdoI gJ8fd9Cp9afW7kTHXM8 SjOEwsECQKmiJZ re biXYJ60T9moJ
iDGcdNvS/s/F8rSqdd31gzdNALRqYWIvZSFVA78CgYBotForfFTDtaSVOFbUDnSc
8IvPN4kTUa49dR 7Jc2g6Yc2peNioAtnoVApl7dLPPyen8yH0gHHmeHlXGYEid0s
AjHMwwjHEj4wlW0LZNUiXD8L3yonPVXmH8kI9 qLRZnB3JfJTzGVx4ZQ8VBPJfkp
7MwJnrLDTp/1fZM0JoxYqQKBgQCrweykMIidqqhsuwq1ptHmcqhjgtYRzJgYPEPq
oPUzxcd6YwOxt 8ugEcr42klSfU6rrRkxhZrOPh4Ouspx7GonbNU4der8/EAnk3
Lav9cpsNwLPa ajyBYE1vXNY28oiMiJRUrlCzP7rv9ufJkWZUsmfs1tot27nZpsO
M4sRDQKBgQDvnddTAbTX GAfkGS4t7iYPuwk2U1YplnT75fgvmgbm7Ett4PbeCBb
FLNeGxKodTChqO50 q82qasO00He5XGo aSiwVigxjtI/5QZGjl9WxcWUwLrSTS4
lABg9PGeOzUZSgAVxYzXhJ2kkMtj8NhVqRvAEegjKc/tML6SDJ4coQ==
-----END RSA PRIVATE KEY-----
rsa.ExportPrivateKey(RSAKeyType.Pkcs8);
rsa.ExportPublicKey(RSAKeyType.Pkcs8);Private Key Output：
MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDLGWghUU/jAMivM53r6M01dtHIQwtDlDhfNLot5keKXRA0PD/yZ3ZZoi7W1ffvyfcuw2Db8nTGGIThFfESi7eyQdrLWqC7x8MppRtL6pYyercyApC4UhFBLTF4oUX/vecK9bHw/SuQGJtDfilZIxIfNZWpVrYpzEyAWpI6ix pUlCA5LM9q3C6JbLsiMEvX3ypafoYUeOwx4ydEn3NwoR8EpeLzi3OHfcvo m4yOUrLZXlMhDnMgPwyew4TOW/NsqaBvJJ 9r5hF/dcEQmpA8uvO6HJU7pClbwm0QjjjKdC/r//MHuiOFdv5b5bU0MJQGJ09tEWkEfUr/TqI2wZm/hAgMBAAECggEBAMVXX32YI3ZfqZ/LGLRD1TkQxc /jS9R0uB3PDwjF/pSaM9Ih54Cd9WqJ7bp2upspLgUcYXldR SbXLDviUWCxyyrmSPH8S12mUZn4dJXj2YTW7TXUkrvMZGol4i3gAbxmY4y3hslqqBrkOLT6Pj1tTqXQxYS9IbR24kExe9XLtIm/ 3VcXRlW7AT2TZk1TRSjYB5OPmlYoPdQEZYk4ZL0NUNj1 HvQoeHX b1iXJ08bP KuTnJ zxe6WG0x8x1cCpwOwGvEqMQ2SSyJihxw0969hPwwyeDDEWxkjaZdQt4I aYE4KvLR75ixfkk6u5cknidmZjY0OCR2iLHbR40D/0CgYEA46 zjaa2cJEo1 7c8JSZHf 8/NAWAbo388caBIHlQ3tWDGVKbD0V PsJPU3ZCZfIM0K1vBY0G/Ss/Pdn2CLVQwHHaVRMSAlpOdwzQdiao8dkT1B3zcVlzbInKbsc06C/3NCQZ NKi1P2rlJ8u7tBq2Phbltwzu/KEfNe4vD2n7cCgYEA5Fr8WylpAF4o0LoOX1nZy4swvyOpG9a9yM9qilHeUVveIC7hEgNNe6kuasvmunPdF/8jOlcit2pBdg85Xu76h3g AWK5cwnWwojeI3msAXpnej/VI5NkNGeTbJB64sX6PpmPvhMwApS6RRqpGttQ qcO6lx6Vn5FF jP8NxmvScCgYBC0nQd5Imyq8eS6BWLvfDaLw4mHGP5CdAWCZ8HJ6BDl9T/OlMHRT5HnlVt2oUSHaux76gqlVGhysNiUrH1avOwALunnAfvNGPfiVK5xnpMCt7TsEgY6hAguGJqCvJA4fKtOcDH3JsqHPBO5QKajjCNvniQzOFkuldRwV1duV6ILQKBgHrngZVrJ0l8ZElbKmslh/RmWPk3L0h9fq36/OOvhpGReW8m7BpuzqA1AXeXgPpva9sDhilbRqMjPFJXhVBUHWEWVYEXaqrA6 bOFYlQbkRpZhJFEulP5gnSiWVQKeOuHK7epZ/u4dMxy0NwQv3idqZBjeSTm4C7 2IP wMvDNjXAoGBANM9wm6iiZOqZTCdMh/bnRDkChFTr8uLmbu5dtG8iXkGDhq0gX73GRrg4YL3R9oGSG/95zp5KThD94eAxZR1jrIChze77V6Y1urOMruUiluFIokoI94xUb7oh988yG2RSHzWQ3YzOGV1KqIf05j9JJvXZYcjUmB5yFWzPZVmDiwi
rsa.ExportPrivateKey(RSAKeyType.Pkcs8, true);
rsa.ExportPublicKey(RSAKeyType.Pkcs8, true);Private Key Output：
-----BEGIN PRIVATE KEY-----
MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDXuqAQz MyeKuC
335rPshsHUFxLpZcBj97EiHq9qhvxMhLsMoa3YFvKlwktBoQWzZzgETls1N0H5E/
yhV pljN4TIubfsOQ68TUfJkr9b S1/25KwOwUmMndqaFb/vcYj1QtWTl65OXOWL
l3oKl7j2kwjmwtW8Smm97cEw15ijmRALP3qGvYyzL/YRIOHv PmDpoMG0dedZRNz
u7hdhkU/UrlaRLvDLHyUJPkM 4SJHVUa2epYFMB7OX/b4ZQR0unxIBea2HAo8byG
qctOB41cXa6 t8dvRj2DhCXhMHGXKNU8DL9aALLmCbl2UTsJQyvNQ3FaT7TzQYsw
gOevjFttAgMBAAECggEBALltxOAukM91QZdAm917HbMwgmvS65M2G6Kht13LnoRT
1Qaac14cP4FaG9HArRaaEHe/LXlzZqxN5f 6qDcwrOxqQUP/bOiZ7QbiTUOWkWoL
R/VkITCdm6aumJQRVeVu5ZZLWGGA42agGv6duV0ZhPcM833GwwkRvUpv7rsY1i7n
ccUObhkv3ql8XjnCcz1rSSkf6W40 dp0pW2mCH6NPeT8kdtBH7mA/ZSK7ZMQbMGg
LNdCx069o91POKP/nZ9V9Ex2Bviic2TqpilC6Z/9EryxA0HszknUMX7Lnuhr7Fsb
n8wkvYLplebolTOrCy/athEZkGdwCrgdGFk7by/XsdECgYEA9BX0vnhr1d1A9rxz
YYt/Xt3DqqtnQ8ETe4CldI3/XIJ3CcMI4f52dAk Jl9V4vHu4HRKODWjJ67FDExQ
Bu FWUjk01rFSMmbsVJRenRyuGL4X5XTRwMCtcIcxfvYgttLVVpqCsDK2CredAxc
u RZ5eI0/Y4gc BKzDIbSy1LQ2sCgYEA4kJUQ4BlIQHD2CEj49ORL/WzWk01Wi9A
2ilQcVf/xbLeBJd04SemftHLF4ulKM6VZ4KyrTzewwM6rEw31fWo7dgxShwTdnMI
Hn3esTdZYK6O6zQ8PuEi/q4hTx4QYXDq63pKoDRTrkQAVZdTe0ujyczPXjdAKwYF
obd3sk606ocCgYA7tpdedZVkB7HZ6vaLOZZafgRdX3tu3vBGOY3AuvBrEFvQ3o7w
wtD1yEEVICOh1rAq5yg1IiIdFiuMu6qkV7qWwjeA4Wb8TJ4zPkFCpPRf2Y6Ly9qZ
N8pU7v0dDmTEdqOyaOEialH1ml87or6ZFN9NVw7BrSCRWKDT3bpBpP4RqwKBgQC/
i5u kaILsWzVOikiJOgTDBTMa/Sw5rQmfTdm3TLhca3XgUknm OuFXmz8zrdMxb0
zIbrdk64FbHET7otXo2m3ZHMxbwMWRIUjkbLDKqT2PORV2VxbjOsHEqCqlb/xxJ6
S8uFmQcGzvbhfvzjsoN0wfkEMA4Y3j5CTAn/X/Z1XQKBgGG4qDagG1unSkpNfHfu
qwjEjAkSR/pla4vJIaEaA94/gJ21upZfwjUUdRXJbk6W03OfSOlmy2zIeCguV H/
UkMOcmBqVX/tbCQy7weCQwwHU4Dluy7xJIzrgYRXIuV 3zk2D63 LAK84 ksbL61
zCnaG86YfYxcClOZ/revxrnd
-----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>);