Openssl Generate X509 Certificate From Private Key

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Openssl X509 To Pkcs12
C# Generate X509 Certificate
Openssl X509 Example

This topic tells you how to generate self-signed SSL certificate requests using the OpenSSL toolkit to enable HTTPS connections. Run the following OpenSSL command to generate your private key and public certificate. Answer the questions and enter the Common Name when prompted. Openssl x509 -text -noout -in certificate.pem. Az aks generate-ssh-keys. Combine your. Use the opensslx509certificate resource to generate signed or self-signed, PEM-formatted x509 certificates. If no existing key is specified, the resource will automatically generate a passwordless key with the certificate. If a CA private key and certificate are provided, the.

Common OpenSSL Commands with Keys and Certificates

Generate RSA private key with certificate in a single command

Generate Certificate Signing Request (CSR) from private key with passphrase

Generate RSA private key (2048 bit)

Generate a Certificate Signing Request (CSR)

Generate RSA private key (2048 bit) and a Certificate Signing Request (CSR) with a single command

Convert private key to PEM format

Openssl X509 To Pkcs12

Generate a self-signed certificate that is valid for a year with sha256 hash

C# Generate X509 Certificate

View details of a RSA private key

View details of a CSR

Openssl Generate X509 Certificate From Private Key

View details of a Certificate

View details of a Certificate in DER format

Convert a DER file (.crt .cer .der) to PEM

Convert a PEM file to DER

Use openssl to create an x509 self-signed certificate authority (CA), certificate signing request (CSR), and resulting private key with IP SAN and DNS SAN

Openssl X509 Example

create-certs.sh

# Define where to store the generated certs and metadata.

DIR='$(pwd)/tls'

# Optional: Ensure the target directory exists and is empty.

rm -rf '${DIR}'

mkdir -p '${DIR}'

# Create the openssl configuration file. This is used for both generating

# the certificate as well as for specifying the extensions. It aims in favor

# of automation, so the DN is encoding and not prompted.

cat >'${DIR}/openssl.cnf'<<EOF

[req]

default_bits = 2048

encrypt_key = no # Change to encrypt the private key using des3 or similar

default_md = sha256

prompt = no

utf8 = yes

# Speify the DN here so we aren't prompted (along with prompt = no above).

distinguished_name = req_distinguished_name

# Extensions for SAN IP and SAN DNS

req_extensions = v3_req

# Be sure to update the subject to match your organization.

[req_distinguished_name]

C = US

ST = California

L = The Cloud

O = Demo

CN = My Certificate

# Allow client and server auth. You may want to only allow server auth.

# Link to SAN names.

[v3_req]

basicConstraints = CA:FALSE

subjectKeyIdentifier = hash

keyUsage = digitalSignature, keyEncipherment

extendedKeyUsage = clientAuth, serverAuth

subjectAltName = @alt_names

# Alternative names are specified as IP.# and DNS.# for IP addresses and

# DNS accordingly.

[alt_names]

IP.1 = 1.2.3.4

DNS.1 = my.dns.name

EOF

# Create the certificate authority (CA). This will be a self-signed CA, and this

# command generates both the private key and the certificate. You may want to

# adjust the number of bits (4096 is a bit more secure, but not supported in all

# places at the time of this publication).

# To put a password on the key, remove the -nodes option.

# Be sure to update the subject to match your organization.

openssl req

-new

-newkey rsa:2048

-days 120

-nodes

-x509

-subj '/C=US/ST=California/L=The Cloud/O=My Company CA'

-keyout '${DIR}/ca.key'

-out '${DIR}/ca.crt'

# For each server/service you want to secure with your CA, repeat the

# following steps:

# Generate the private key for the service. Again, you may want to increase

# the bits to 4096.

openssl genrsa -out '${DIR}/my-service.key' 2048

# Generate a CSR using the configuration and the key just generated. We will

# give this CSR to our CA to sign.

openssl req

-new -key '${DIR}/my-service.key'

-out '${DIR}/my-service.csr'

-config '${DIR}/openssl.cnf'

# Sign the CSR with our CA. This will generate a new certificate that is signed

# by our CA.

openssl x509

-req

-days 120

-in '${DIR}/my-service.csr'

-CA '${DIR}/ca.crt'

-CAkey '${DIR}/ca.key'

-CAcreateserial

-extensions v3_req

-extfile '${DIR}/openssl.cnf'

-out '${DIR}/my-service.crt'

# (Optional) Verify the certificate.

openssl x509 -in '${DIR}/my-service.crt' -noout -text

# Here is a sample response (truncate):

# Certificate:

# Signature Algorithm: sha256WithRSAEncryption

# Issuer: C = US, ST = California, L = The Cloud, O = My Organization CA

# Subject: C = US, ST = California, L = The Cloud, O = Demo, CN = My Certificate

# # ..

# X509v3 extensions:

# X509v3 Basic Constraints:

# CA:FALSE

# X509v3 Subject Key Identifier:

# 36:7E:F0:3D:93:C6:ED:02:22:A9:3D:FF:18:B6:63:5F:20:52:6E:2E

# X509v3 Key Usage:

# Digital Signature, Key Encipherment

# X509v3 Extended Key Usage:

# TLS Web Client Authentication, TLS Web Server Authentication

# X509v3 Subject Alternative Name:

# IP Address:1.2.3.4, DNS:my.dns.name

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