Php Generate Sha Pem Key
If you're using openssl_pkey_new() in conjunction with openssl_csr_new() and want to change the CSR digest algorithm as well as specify a custom key size, the configuration override should be defined once and sent to both functions:
<?php
$config = array(
'digest_alg' => 'sha1',
'private_key_bits' => 2048,
'private_key_type' => OPENSSL_KEYTYPE_RSA,
);
$privkey = openssl_pkey_new($config);
$csr = openssl_csr_new($dn, $privkey, $config);
?>
Although openssl_pkey_new() will accept the 'digest_alg' argument it won't use it, and setting the value has no effect unless you also set this value for openssl_csr_new(). The reason for this is that the $config array is acting as a drop-in replacement for the values found in the openssl.cnf file, so it must contain all of the override values that you need even if the function they're being sent to won't use them.
Also, if you change the 'digest_alg' to something like 'sha256' and still get an MD5 signed CSR check your openssl.cnf file to see whether the digest algorithm you want to use is actually supported.While Encrypting a File with a Password from the Command Line using OpenSSL is very useful in its own right, the real power of the OpenSSL library is its ability to support the use of public key cryptograph for encrypting or validating data in an unattended manner (where the password is not required to encrypt) is done with public keys. The Commands to Run Generate a 2048 bit RSA Key. The first step creates a DSA parameter file, dsaparam.pem, which in this case instructs OpenSSL to create a 2048-bit key in Step 2. The dsaparam.pem file is not itself a key, and can be discarded after the public and private keys are created. The second step actually creates the private key in the file dsaprivkey.pem which should be kept secret. Note: For printing purposes, you can SHOW ALL or HIDE ALL Instructions. OpenSSL is a very powerful cryptography utility, perhaps a little too powerful for the average user. With all the different command line options, it can be a daunting task figuring out how to do exactly what you want to do. Here are several common tasks you may find useful. (Java) RSA SHA256 Signature using Private Key from Java Keystore. Signs plaintext using RSA SHA256 using a key from a Java keystore. Duplicatest this code. Generate private key with password from mmc.