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OpenSSL "genpkey rsa_keygen_bits:256" - RSA Short Keys
How to generate a new RSA key pair with a shorter key size using OpenSSL "genpkey" command?
✍: FYIcenter.com
If you need a new RSA key pair with a shorter key size for testing purpose, you can use the OpenSSL "genpkey -pkeyopt rsa_keygen_bits:nnn" command. The "-pkeyopt rsa_keygen_bits:nnn" option specifies the size of the RSA key to be generated in number of bits. The default is 1024 bits.
C:\Users\fyicenter>\local\openssl\openssl.exe OpenSSL> genpkey -algorithm rsa -out rsa_test.key -pkeyopt rsa_keygen_bits:256 ......+++++++++++++++++++++++++++ ....+++++++++++++++++++++++++++ OpenSSL> pkey -in rsa_test.key -text -noout Private-Key: (256 bit) modulus: 00:c6:bf:35:af:5e:96:42:5e:04:96:f1:ec:ad:86: d1:a9:91:87:7b:78:78:63:6d:b2:91:de:86:47:48: 95:cc:4b publicExponent: 65537 (0x10001) privateExponent: 00:be:db:f0:da:30:a3:6b:a8:8e:0f:c6:d3:da:f0: 95:75:e8:31:4e:a0:17:ab:fb:f9:3e:1b:62:35:26: 61:fd:c1 prime1: 00:ec:43:b4:25:41:29:98:61:5e:06:10:ee:3d:37: 96:07 prime2: 00:d7:59:3a:5a:0e:67:25:e6:64:ff:04:a7:fc:88: 66:9d exponent1: 63:0b:96:ef:af:3b:92:c7:ee:b4:b8:50:47:95:8f: ed exponent2: 00:d4:2c:a2:d4:76:1a:64:fa:22:8a:2c:d1:42:7c: 35:f5 coefficient: 00:80:a5:54:43:0f:18:97:bb:5f:72:20:24:7e:79: 9b:6b
What this test tells us:
⇒ OpenSSL "genpkey rsa_keygen_bits:10240" - RSA Long Keys
⇐ OpenSSL "pkey -pubin" - View RSA Public Key
2018-01-13, 3212🔥, 0💬
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