一、CSR证书转CRT
CSR（Certificate Signing Request）证书是用来申请数字证书的文件格式，由于数字证书需要通过权威机构进行颁发和验证，而权威机构只颁发CRT格式的证书，因此需要将CSR格式转化为CRT格式。下面是一个简单的Python代码示例，用于CSR证书转换为CRT证书。
from OpenSSL.crypto import load_certificate, FILETYPE_PEM, load_csr, sign, dump_privatekey, PKey
def csr_to_crt(csr_file_path, ca_crt_file_path, ca_key_file_path):
csr_file = open(csr_file_path, 'rb').read()
csr = load_csr(FILETYPE_PEM, csr_file)
ca_crt_file = open(ca_crt_file_path, 'rb').read()
ca_crt = load_certificate(FILETYPE_PEM, ca_crt_file)
ca_key_file = open(ca_key_file_path, 'rb').read()
ca_key = dump_privatekey(FILETYPE_PEM, PKey._from_raw_private_key(ca_key_file))
signed_crt = sign(ca_key, ca_crt, csr, days=365)
return signed_crt
csr_file_path = "path_to_csr_file"
ca_crt_file_path = "path_to_ca_certificate_file"
ca_key_file_path = "path_to_ca_private_key_file"
crt_file_path = "path_to_new_certificate_file"
crt = csr_to_crt(csr_file_path, ca_crt_file_path, ca_key_file_path)
open(crt_file_path, 'wb').write(crt)
二、船舶证书CSR是什么
船舶证书CSR与其他领域的CSR并无区别，都是用于申请数字证书的文件格式。不过由于船舶证书涉及到的信息与普通证书不同，所需的CSR文件格式也有所不同。船舶的CSR格式如下：
Company Name: The name of the company or organization. Department: The department of the company or organization (optional). Address: The address of the company or organization. City/Locality: The city of the organization. State/Province: The state or province of the organization. Country: The country of the organization. Domain Name: The fully-qualified domain name that the certificate will be issued to. Email: An email address to contact the organization with. Public Key: The public key generated by the organization’s server
三、CSR证书文件
CSR证书文件是用于申请数字证书的文件格式，它包含了申请证书所需的信息，如公钥、组织名称、组织地址等。下面是一个示例CSR文件：
-----BEGIN CERTIFICATE REQUEST----- MIIC6TCCAdECAQAwezELMAkGA1UEBhMCVUsxEDAOBgNVBAgMB1NlbGZpbmchMRQw EgYDVQQHDAtQaGlsYXJvbm1hbjERMA8GA1UECgwIaG9tZXBhZG1pbi5jb20xETAP BgNVBAMTCHNlcnZlci5jb20xHTAbBgkqhkiG9w0BCQEWDnNlcnZlckBjbG91ZC5j b20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDO50kR8iyt3LvzyKee ZZzYkFkYEjD7TyKry/WXbK5lqWcWzUt6RiwvJQ2RSa9g613IVdf/cxsKv4/KcjFN xySR4cx5dU/4FftuNd6Ttar/PJuug47Bl0B/l7v5SYwQrIuzIs4FrI68KzgRITvG k6wGyOdeKA0gT0Ivjw0exgU7IgW1ghNAvW3/1WTaWX/6o/UHF5r0qL3kls9N34uA JfTgcA+YcwtfKOR5tDZe41+2k8LZId3S5QYrCkpnztQ1DWN2hzSzdDllU662y1+D /n1gIZaL6UBGxRIo3Jowee9wiTXlg7qywBrPpuavAtVvfwjL+/Gdu0vMLKvnAQOj HtGxAgMBAAGgADA2BgkqhkiG9w0BCQ4xKjAoMB4GA1UdEQQXMBWCEXNlcnZlci5j b20wDQYJKoZIhvcNAQELBQADggEBAJ6yHzQuaTQs5QrJzDx4JqWPRNHTMUPAExDK Mvf5sRd8Mv++as7t7qgA6O4NdJZo5gxeon9FdJ83xEmDDDFq//mKbA9aAO5LivJy DTMS69JZrvm4FJdc2E+YJ0sFy1cK8Vdg8+VjxsHGW9gzmZBhJzQqQDSOcy/zLsdN NITp75WkkD6ejw9C+pK/ZKv10oa+9KX4b4U9JidEajF9LYXmvLiXokzrT44yaglS LXfXjvjh7GH8pb0SwloCMzZgRHeIE60ChzGd1yI5JyJCyNalYqmklz0+l1945v26 8BgDxy1x9yMCZSuPJFMeYEQ9BccvpaadOwYSW1nO4mU= -----END CERTIFICATE REQUEST-----
四、CSL证书
CSL（Certificate Servicer List）证书是用来撤销数字证书的文件格式，它包含了所有被撤销的证书序列号。在进行数字证书验证时，颁发机构会检查该序列号是否被包含在CSL列表中，如果是则证书无法通过验证。
五、CSR证书是什么
CSR证书是用于申请数字证书的文件格式，它包含了组织、域名、公钥等信息，是数字证书颁发机构生成证书的起点。CSR证书可以通过openssl命令生成：
openssl req -new -newkey rsa:4096 -nodes -out mycsr.csr -keyout mykey.key
六、CSR证书信息
CSR证书信息包含了组织、域名、公钥等信息，在申请数字证书时需要提供这些信息。下面是一个CSR证书信息的例子：
Country = CN State = Shanghai Locality = Shanghai Organization = GitHub, Inc. Organizational Unit = IT Department Common Name = example.com Email = info@example.com
七、CSR证书有用吗
CSR证书对于申请数字证书来说是非常重要的，因为它包含了组织、域名、公钥等信息，是数字证书颁发机构生成证书的起点。没有CSR证书，就无法申请数字证书。
八、CSR证书请求文件
CSR证书请求文件就是指带有CSR信息的文件，用于向数字证书颁发机构申请证书。在申请数字证书时，通常需要提供CSR证书请求文件和合法的认证信息。下面是一个CSR证书请求文件的例子：
-----BEGIN CERTIFICATE REQUEST----- MIIC0jCCAbICAQAwgZMxCzAJBgNVBAYTAkNOMQ0wCwYDVQQIDAREZWxhd2VyMTc wNQYDVQQDDC5leGFtcGxlLmNvbSBsb2NhbGhvc3QgQ0EgMDAxIENBIDIwMTmCEQD 0WEdzDrS6xEfbL0qR33m+LWilLmMANBgkqhkiG9w0BAQsFADB7MQswCQYDVQQGEw JDTjENMAsGA1UECAwERGVsYXdlcjEUMBIGA1UEBwwLU2hhaGxhbmQxEzARBgNVBAo MCkdvdmVybm1lbnQgSW5jMSQwIgYDVQQLDBtIVE1MIENlcnRpZmljYXRlIEF1dGhv cml0eTEbMBkGA1UEAwwSd3d3Lm15c2NyaXB0Lm9yZzEeMBwGCSqGSIb3DQEJARYP aW5mb0BteXNjcmlwdC5vcmcwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMTb gjAt+a0Ed9bC+TczAdxTQSkKdDwgSD/vrM5AlaKV9M6Fg4wpiu2EYsH9JyLfzqVO LJPxEO4HczET80U8VfzQxgnOxrWLi7nHSKbAvoDJduOxMcEF1fn/9bukfJ/XNb/9 8hwzqwstwL3HwSmlC8fe9LvENAdk+CvBnfWxAguvAgMBAAGgADANBgkqhkiG9w0B AQsFAAOBgQDwoGQizfTbJoK+wimlyweLjOXfYcRfyrZEEiKtm1stsbNGDskcNQ7/ w2Mg5S8+W7soJ/d2R/L+fA/4VObHBzv+DKu6NWHRNRUqkuUDRDq4p5BVJYnpVOWz 0KnQb2Z+gcso+IujwjGqBWzid5fdYeeXwJYs8oWME8y+M2YRf4WdlA== -----END CERTIFICATE REQUEST-----
九、CSR证书签发系统
CSR证书签发系统是一套软件系统，用于针对CSR证书进行颁发。CSR证书签发系统主要有两个部分，一个是客户端，用于生成CSR证书和发送申请请求；另一个是服务端，用于验证申请信息、签发证书、生成证书链等操作。下面是一个简单的CSR证书签发系统的Python代码示例：
from OpenSSL.crypto import load_certificate, FILETYPE_PEM, load_csr, sign, dump_privatekey, PKey
def csr_to_crt(csr_file_path, ca_crt_file_path, ca_key_file_path):
csr_file = open(csr_file_path, 'rb').read()
csr = load_csr(FILETYPE_PEM, csr_file)
ca_crt_file = open(ca_crt_file_path, 'rb').read()
ca_crt = load_certificate(FILETYPE_PEM, ca_crt_file)
ca_key_file = open(ca_key_file_path, 'rb').read()
ca_key = dump_privatekey(FILETYPE_PEM, PKey._from_raw_private_key(ca_key_file))
signed_crt = sign(ca_key, ca_crt, csr, days=365)
return signed_crt
def verify_csr(csr_file_path):
csr_file = open(csr_file_path, 'rb').read()
csr = load_csr(FILETYPE_PEM, csr_file)
# 验证证书的各种信息是否正确，如组织名、域名等
pass
csr_file_path = "path_to_csr_file"
ca_crt_file_path = "path_to_ca_certificate_file"
ca_key_file_path = "path_to_ca_private_key_file"
crt_file_path = "path_to_new_certificate_file"
# 验证CSR证书
verify_csr(csr_file_path)
# 将CSR证书转换成CRT证书
crt = csr_to_crt(csr_file_path, ca_crt_file_path, ca_key_file_path)
open(crt_file_path, 'wb').write(crt)
