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OpenSSL "req -x509 -set_serial" - Certificate Serial Number
Can I sign my own CSR with a given serial number using the OpenSSL "req -x509" command?
✍: FYIcenter.com
Yes, you can sign you own CSR (Certificate Sign Request) with a given serial number using the OpenSSL "req -x509 -set_serial" command as shown below. Without the "-set_serial" option, the resulting certificate will have random serial number. See the example below:
C:\Users\fyicenter>\local\openssl\openssl.exe OpenSSL> req -x509 -in rsa_test.csr -key rsa_test.key -out rsa_test.crt -set_serial 1024 Enter pass phrase for rsa_test.key:fyicenter OpenSSL> x509 -in rsa_test.crt -serial -noout serial=0400
As you can see the given serial number is stored as a binary integer format. In the above example, 0x0400 = 1024.
⇒ OpenSSL "req -x509 -md5" - MD5 Digest for Signing
⇐ OpenSSL "req -x509 -days" - Longer Self-Signed Certificate
2016-11-11, 18716🔥, 0💬
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