TungNT (Blue)

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====== 1. Tạo key RSA ======

**Một số lệnh tạo key file:**

<code bash>
openssl genrsa -des3 -out private_key.key 2048
openssl genrsa -out private_key.key 2048 # without password
openssl req -new -key private_key.key -out private_key.csr
openssl req -new -x509 -days 1001 -key private_key.key -sha256  -out public_key.cer
openssl req -new -x509 -nodes -sha256 -days 365 -key private_key.key -out public_key.cert
openssl pkcs12 -export -in public_key.cer -inkey private_key.key -out private_key.pfx
openssl pkcs12 -in private_key.pfx -nocerts -out private_key.pem
openssl pkcs12 -export -in public_key.cer -inkey private_key.key -out private_key.p12 
openssl x509 -in public_key.cer -out public_key.der -outform DER
openssl x509 -inform der -in public_key.der -out public_key.cer

keytool -importkeystore -srckeystore private_key.p12 -srcstoretype PKCS12 -destkeystore private_key.jks -deststoretype JKS 
keytool -importkeystore -srckeystore private_key.jks -destkeystore private_key.jks -deststoretype pkcs12
keytool -changealias -alias 1 -destalias custom-alias-name -keystore private_key.jks
</code>

**Tham khảo:**
  * [[https://www.scottbrady91.com/openssl/creating-rsa-keys-using-openssl|Creating RSA Keys using OpenSSL]]
  * [[https://8gwifi.org/RSAFunctionality?rsasignverifyfunctions=rsasignverifyfunctions&keysize=2048|Tool debug online]]
  * [[https://www.sslshopper.com/ssl-converter.html|SSL converter (to binary)]]
  * [[https://packagist.org/packages/phpseclib/phpseclib|Package phpseclib]]
  * [[https://phpseclib.sourceforge.net/rsa/2.0/examples.html|phpseclib: RSA Examples and Notes]]
  * [[https://docs.openssl.org/master/man1|OpenSSL commands]]

<code bash>
tungnt@MacBook-Pro-cua-Nguyen-2 2024 % openssl x509 -help                                         
Usage: x509 [options]

General options:
 -help                      Display this summary
 -in infile                 Certificate input, or CSR input file with -req (default stdin)
 -passin val                Private key and cert file pass-phrase source
 -new                       Generate a certificate from scratch
 -x509toreq                 Output a certification request (rather than a certificate)
 -req                       Input is a CSR file (rather than a certificate)
 -copy_extensions val       copy extensions when converting from CSR to x509 or vice versa
 -inform format             CSR input format to use (PEM or DER; by default try PEM first)
 -vfyopt val                CSR verification parameter in n:v form
 -key val                   Key for signing, and to include unless using -force_pubkey
 -signkey val               Same as -key
 -keyform PEM|DER|ENGINE    Key input format (ENGINE, other values ignored)
 -out outfile               Output file - default stdout
 -outform format            Output format (DER or PEM) - default PEM
 -nocert                    No cert output (except for requested printing)
 -noout                     No output (except for requested printing)

Certificate printing options:
 -text                      Print the certificate in text form
 -dateopt val               Datetime format used for printing. (rfc_822/iso_8601). Default is rfc_822.
 -certopt val               Various certificate text printing options
 -fingerprint               Print the certificate fingerprint
 -alias                     Print certificate alias
 -serial                    Print serial number value
 -startdate                 Print the notBefore field
 -enddate                   Print the notAfter field
 -dates                     Print both notBefore and notAfter fields
 -subject                   Print subject DN
 -issuer                    Print issuer DN
 -nameopt val               Certificate subject/issuer name printing options
 -email                     Print email address(es)
 -hash                      Synonym for -subject_hash (for backward compat)
 -subject_hash              Print subject hash value
 -subject_hash_old          Print old-style (MD5) subject hash value
 -issuer_hash               Print issuer hash value
 -issuer_hash_old           Print old-style (MD5) issuer hash value
 -ext val                   Restrict which X.509 extensions to print and/or copy
 -ocspid                    Print OCSP hash values for the subject name and public key
 -ocsp_uri                  Print OCSP Responder URL(s)
 -purpose                   Print out certificate purposes
 -pubkey                    Print the public key in PEM format
 -modulus                   Print the RSA key modulus

Certificate checking options:
 -checkend intmax           Check whether cert expires in the next arg seconds
                            Exit 1 (failure) if so, 0 if not
 -checkhost val             Check certificate matches host
 -checkemail val            Check certificate matches email
 -checkip val               Check certificate matches ipaddr

Certificate output options:
 -set_serial val            Serial number to use, overrides -CAserial
 -next_serial               Increment current certificate serial number
 -days int                  Number of days until newly generated certificate expires - default 30
 -preserve_dates            Preserve existing validity dates
 -set_issuer val            Set or override certificate issuer
 -set_subject val           Set or override certificate subject (and issuer)
 -subj val                  Alias for -set_subject
 -force_pubkey infile       Key to be placed in new certificate or certificate request
 -clrext                    Do not take over any extensions from the source certificate or request
 -extfile infile            Config file with X509V3 extensions to add
 -extensions val            Section of extfile to use - default: unnamed section
 -sigopt val                Signature parameter, in n:v form
 -badsig                    Corrupt last byte of certificate signature (for test)
 -*                         Any supported digest, used for signing and printing

Micro-CA options:
 -CA infile                 Use the given CA certificate, conflicts with -key
 -CAform PEM|DER            CA cert format (PEM/DER/P12); has no effect
 -CAkey val                 The corresponding CA key; default is -CA arg
 -CAkeyform PEM|DER|ENGINE  CA key format (ENGINE, other values ignored)
 -CAserial val              File that keeps track of CA-generated serial number
 -CAcreateserial            Create CA serial number file if it does not exist

Certificate trust output options:
 -trustout                  Mark certificate PEM output as trusted
 -setalias val              Set certificate alias (nickname)
 -clrtrust                  Clear all trusted purposes
 -addtrust val              Trust certificate for a given purpose
 -clrreject                 Clears all the prohibited or rejected uses of the certificate
 -addreject val             Reject certificate for a given purpose

Random state options:
 -rand val                  Load the given file(s) into the random number generator
 -writerand outfile         Write random data to the specified file
 -engine val                Use engine, possibly a hardware device

Provider options:
 -provider-path val         Provider load path (must be before 'provider' argument if required)
 -provider val              Provider to load (can be specified multiple times)
 -propquery val             Property query used when fetching algorithms
</code>
====== 2. Sử dụng RSA từ postman ======

**Cài đặt thư viện:** https://joolfe.github.io/postman-util-lib/dist/bundle.js

**Add đoạn code mẫu sau vào tab scripts của postman:**

<file javascript>
const uuid = require('uuid'); 
eval(pm.globals.get('pmlib_code'));
const requestId = uuid.v4();    
const partnerId = pm.environment.get("partner_id");
const amount = 20000;
const expires_time = 12;
// Merchant's Private Key
const merchantPrivateKey = pm.environment.get("merchant_private_key");
const sig = new pmlib.rs.crypto.Signature({"alg": "SHA1withRSA"}); // If use rsa sha1 algorithm
//const sig = new pmlib.rs.crypto.Signature({"alg": "SHA256withRSA"}); // If use rsa sha256 algorithm

const payload = requestId + "|" + partnerId + "|" + amount;
    
sig.init(merchantPrivateKey);
sig.updateString(payload);

var sigVal = sig.sign();
var sigStr = pmlib.rs.hextob64u(sigVal);

sigStr = sigStr.replace(/_/g,"/");
sigStr = sigStr.replace(/-/g,"+") + '==';

pm.environment.set("request_id", requestId);
pm.environment.set("partner_id", partnerId);
pm.environment.set("amount", amount);
pm.environment.set("expires_time", expires_time);
pm.environment.set("signature", sigStr);
</file>

====== 3. Tra cứu chứng thư số ======

<code bash>
% openssl x509 -in public_key.cer -text -noout

% openssl x509 -in public_key.cer -serial -noout 
serial=5401120DBEDE6BADB78DB6895AEA45AA

% openssl x509 -in public_key.cer -dates -noout  
notBefore=Aug 23 08:25:05 2023 GMT
notAfter=Aug 25 08:25:05 2026 GMT

% openssl rsa -noout -modulus -in tcb_refund.crt | openssl md5
MD5(stdin)= ae4a16924cebaccc1b7a8240507930d0

</code>

https://i-ca.vn/chung-thu-so/tra-cuu

====== 4. Tra cứu Remote Certificates ======

<code bash>
openssl s_client -connect www.example.com:443 < /dev/null | openssl x509 -noout -dates
</code>

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