Difference between revisions of "OpenSSL"
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| + | [[Wikipedia:OpenSSL|OpenSSL]] (1988) is an open source implementation of the [[wikipedia:Transport Layer Security|TSL]] cryptographic protocol, and its now-deprecated predecessor, Secure Sockets Layer ([[SSL]]) protocol. | ||
| + | * <code>[[yum install openssl]]</code> | ||
| + | * [[rpmfind.net]]: https://rpmfind.net/linux/rpm2html/search.php?query=openssl | ||
| + | == CSR Examples == | ||
| + | * '''Generate a new '''self signed certificate''' instead of a [[Certificate Signing Request (CSR)]] ''' | ||
| + | : <code>openssl req -[[x509]] -nodes -days 3650 -newkey [[rsa]]:2048 -keyout private.key -out public.[[pem]]</code> | ||
| + | ::Output a self-signed certificate instead of a certificate request | ||
| + | :::<code>-nodes</code> (short for no DES) do not encrypt private key | ||
| + | :::<code>-x509</code> Output a self-signed certificate instead of a certificate request | ||
| + | |||
| + | * Generate a multi domain self signed certificate, read https://serverfault.com/questions/73689/how-to-create-a-multi-domain-self-signed-certificate-for-apache2 | ||
| + | |||
| + | |||
| + | * Read certificate ([[CRT]]) | ||
| + | :<code>openssl [[x509]] -text -noout -in root.crt</code> | ||
| + | |||
| + | * Read [[CSR]] | ||
| + | :<code>openssl req -text -noout -in root.csr</code> | ||
| + | |||
| + | |||
| + | == Public keys == | ||
| + | * Generate a [[public key]] from a [[PEM]] private key | ||
| + | :<code>openssl [[rsa]] -in mykey.pem -pubout > mykey.pub</code> | ||
== Activities == | == Activities == | ||
| − | * Generate a [[random]] number: <code>openssl rand -base64 32</code><ref>https://www.howtogeek.com/howto/30184/10-ways-to-generate-a-random-password-from-the-command-line/</ref> | + | * Generate a [[random]] number: <code>[[openssl rand]] -base64 32</code><ref>https://www.howtogeek.com/howto/30184/10-ways-to-generate-a-random-password-from-the-command-line/</ref> |
| + | * Save remote [[SSL]] cert as a file: | ||
| + | ** <code>[[openssl s_client]] -showcerts -connect YOUR_DOMAIN.COM:443</code><ref>https://superuser.com/questions/97201/how-to-save-a-remote-server-ssl-certificate-locally-as-a-file</ref> | ||
| + | ** <code>openssl s_client -showcerts -connect YOUR_DOMAIN.COM<:443 </dev/null 2>/dev/null | [[openssl x509]] -outform PEM > mycertfile.pem </code> | ||
| + | |||
| + | * [[Encrypt and decrypt files]] using <code>[[openssl enc]]</code> | ||
| + | |||
| + | == Related terms == | ||
| + | * <code>[[ansible-vault]] encrypt|decrypt|view</code> | ||
| + | * <code>[[ssh-keygen]]</code> | ||
| + | * [[Cypher]] | ||
| + | * [[Hash]] | ||
| + | * <code>[[openssl (command)]]</code> | ||
| + | * [[OpenSSL v3]] | ||
| + | |||
| + | == Vulnerabilities == | ||
| + | |||
| + | |||
| + | == Related == | ||
| + | * <code>[[pycrypto]]</code> python library | ||
== See also == | == See also == | ||
| − | * {{OpenSSH}} | + | * {{openssl}} |
| + | * {{openSSL}} | ||
| + | * {{OpenSSH}} | ||
| + | * {{HTTPS}} | ||
| + | * {{Encryption}} | ||
| + | * {{secrets}} | ||
| + | * {{RSA}} | ||
| + | * {{SSL}} | ||
| + | |||
| + | [[Category:IT Security]] | ||
| + | [[Category:Cryptography]] | ||
| − | + | {{CC license}} | |
| + | Source: https://en.wikiversity.org/wiki/OpenSSL | ||
Latest revision as of 10:32, 17 January 2024
OpenSSL (1988) is an open source implementation of the TSL cryptographic protocol, and its now-deprecated predecessor, Secure Sockets Layer (SSL) protocol.
Contents
CSR Examples[edit]
- Generate a new self signed certificate instead of a Certificate Signing Request (CSR)
openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout private.key -out public.pem- Output a self-signed certificate instead of a certificate request
-nodes(short for no DES) do not encrypt private key-x509Output a self-signed certificate instead of a certificate request
- Output a self-signed certificate instead of a certificate request
- Generate a multi domain self signed certificate, read https://serverfault.com/questions/73689/how-to-create-a-multi-domain-self-signed-certificate-for-apache2
- Read certificate (CRT)
openssl x509 -text -noout -in root.crt
- Read CSR
openssl req -text -noout -in root.csr
Public keys[edit]
- Generate a public key from a PEM private key
openssl rsa -in mykey.pem -pubout > mykey.pub
Activities[edit]
- Generate a random number:
openssl rand -base64 32[1] - Save remote SSL cert as a file:
openssl s_client -showcerts -connect YOUR_DOMAIN.COM:443[2]openssl s_client -showcerts -connect YOUR_DOMAIN.COM<:443 </dev/null 2>/dev/null | openssl x509 -outform PEM > mycertfile.pem
Related terms[edit]
ansible-vault encrypt|decrypt|viewssh-keygen- Cypher
- Hash
openssl (command)- OpenSSL v3
Vulnerabilities[edit]
Related[edit]
pycryptopython library
See also[edit]
openssl[rand | s_client | passwd|openssl req|openssl rsa|openssl genrsa|openssl x509|openssl ca|openssl verify|openssl ec|openssl dgst|openssl pkcs12|openssl asn1parse|openssl help|.cer to .pem, openssl version- OpenSSL: RSA, ECDSA, WolfSSL, AES, Diffie-Hellman (DH) key-exchange,
/etc/ssl/openssl.cnf, OpenSSL v3 - OpenSSH (changelog):
/etc/ssh/sshd_config|/etc/ssh/ssh_config|~/.ssh/|openSSL | sshd logs|sftp|scp|authorized_keys|ssh-keygen|ssh-keyscan|ssh-add|ssh-agent|ssh|Ssh -O stop|ssh-copy-id|CheckHostIP|UseKeychain, OpenSSF - HTTP, HTTP client, HTTP/1.1, HTTP/2, HTTP/3, HTTPS, HSTS CSR, TLS, SSL,
openSSL, WebSockets, WebRTC,ssl_certificateQUIC, HPKP, CT, List of HTTP status codes, URL redirection, Content-type:, Webhook, HTTP headers,--insecure, Axios HTTP client, HTTP cookies, HTTP ETag, Hypertext Transfer Protocol -- HTTP/1.1 - Encryption, openssl, ecryptfs, encfs, GPG, PGP, Symantec Encryption Desktop, VeraCrypt, CMEK, BitLocker, OAEP, Cypher
- Secrets: Kubernetes secrets,
ansible-vault, Hashicorp Vault, AWS Secrets Manager, Google Secret Manager,git-crypt, SOPS: Secrets OPerationS, Google Cloud Secret Manager, GitHub secret scanning alerts - Public-key cryptography: RSA, DSA, ECDSA, EdDSA (Ed25519), AES, RSA Conference, hash,
pkeyutl, Signature, key length, Easyrsa, OAEP, Ron Rivest, Adi Shamir, Leonard Adleman - SSL: OpenSSL, LibreSSL, wolfSSL, BoringSSL, SSL pinning,
/etc/ssl/certs/,ca-certificates,/etc/ssl/, sslscan2
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