1. How To Generate Rsa Key Pair
2. Openssl Generate Rsa Key Pair Programmatically Free
3. Use Openssl To Generate Key Pair
4. Openssl Generate Rsa Key Pair Programmatically In C

Aug 29, 2019  Embed Embed this gist in your website. Share Copy sharable link for this gist. Clone via HTTPS Clone with Git or checkout with SVN using the repository’s web address. Generates a self-signed x509 certificate using OpenSSL. Jul 03, 2019  Demonstration of using OpenSSL to create RSA public/private key pair, sign and encrypt messages using those keys and then decrypt and verify the received messages. Commands used: openssl. I have produced an RSA private/public key pair with OpenSSL gave them the public key and have everything working. More recently, somebody pointed out that we are subject to a possible man-in-the-middle attack where the bad guys would accept my public key and pass their own public key. I'm thinking to generate the keypair at HSM. Extract out the public key from HSM and the private key remain store at HSM. Then, i will use the public key to generate the CSR and then let the HSM sign the CSR using the private key and then make the whole thing to conform to PKCS#10 standard. Getting the public key corresponding to a particular private key, through the methods provided for by OpenSSL, is a bit cumbersome. An easier way to do it is to use phpseclib, a pure PHP RSA.

[ aws . ec2 ]

Jul 20, 2012 create certificate request programmatically using OpenSSL API. How to create certificate request programmatically via OpenSSL API? This is the solution for command line utility: openssl. That generates a 2048-bit RSA key pair, encrypts them with a password you provide and writes them to a file. You need to next extract the public key file. You will use this, for instance, on your web server to encrypt content so that it can only be read with the private key. Battlefield 2 product key generator. Export the RSA Public Key to a File. This is a command that is. Openssl rsa -in private.pem -outform PEM -pubout -out public.pem.

Description¶

Creates a 2048-bit RSA key pair with the specified name. Amazon EC2 stores the public key and displays the private key for you to save to a file. The private key is returned as an unencrypted PEM encoded PKCS#1 private key. If a key with the specified name already exists, Amazon EC2 returns an error.

You can have up to five thousand key pairs per Region.

The key pair returned to you is available only in the Region in which you create it. If you prefer, you can create your own key pair using a third-party tool and upload it to any Region using ImportKeyPair .

For more information, see Key Pairs in the Amazon Elastic Compute Cloud User Guide .

See also: AWS API Documentation

See 'aws help' for descriptions of global parameters.

Synopsis¶

Options¶

--key-name (string)

A unique name for the key pair.

Constraints: Up to 255 ASCII characters

--dry-run--no-dry-run (boolean)

--tag-specifications (list)

Shorthand Syntax:

JSON Syntax:

--cli-input-json (string)Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string)Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See 'aws help' for descriptions of global parameters.

Examples¶

To create a key pair

This example creates a key pair named MyKeyPair.

Command:

The output is an ASCII version of the private key and key fingerprint. You need to save the key to a file.

For more information, see Using Key Pairs in the AWS Command Line Interface User Guide.

Output¶

KeyFingerprint -> (string)

KeyMaterial -> (string)

KeyName -> (string)

KeyPairId -> (string)

Tags -> (list)

Any tags applied to the key pair.

(structure)

Describes a tag.

Key -> (string)

The key of the tag.

Constraints: Tag keys are case-sensitive and accept a maximum of 127 Unicode characters. May not begin with aws: .

Value -> (string)

The value of the tag.

Constraints: Tag values are case-sensitive and accept a maximum of 255 Unicode characters.

I wrote this a while ago, but I think it was trivially modified from something I found online. I added a few comments, which perhaps is helpful.
#include <stdio.h>
#include <stdlib.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/evp.h>
// Fatal error; abort with message, including file and line number
//
void fatal_error(const char *file, int line, const char *msg)
{
fprintf(stderr, '**FATAL** %s:%i %sn', file, line, msg);
ERR_print_errors_fp(stderr);
exit(-1);
}
#define fatal(msg) fatal_error(__FILE__, __LINE__, msg)
// Parameter settings for this cert
//
#define RSA_KEY_SIZE (1024)
#define ENTRIES 6
#define REQ_FILE 'example.crt'
#define KEY_FILE 'example.key'
// declare array of entries to assign to cert
struct entry
{
char *key;
char *value;
};
struct entry entries[ENTRIES] =
{
{ 'countryName', 'US' },
{ 'stateOrProvinceName', 'NY' },
{ 'localityName', 'Albany' },
{ 'organizationName', 'example.com' },
{ 'organizationalUnitName', 'Development' },
{ 'commonName', 'Internal Project' },
};
// main ---
//
//
int main(int argc, char *argv[])
{
int i;
RSA *rsakey;
X509_REQ *req;
X509_NAME *subj;
EVP_PKEY *pkey;
EVP_MD *digest;
FILE *fp;
// standard set up for OpenSSL
//
OpenSSL_add_all_algorithms();
ERR_load_crypto_strings();
// seed openssl's prng
//
// commented out for now
/*
if (RAND_load_file('/dev/random', -1))
fatal('Could not seed prng');
*/
// Generate the RSA key; we don't assign a callback to monitor progress
// since generating keys is fast enough these days
//
rsakey = RSA_generate_key(RSA_KEY_SIZE, RSA_F4, NULL, NULL);
// Create evp obj to hold our rsakey
//
if (!(pkey = EVP_PKEY_new()))
fatal('Could not create EVP object');
if (!(EVP_PKEY_set1_RSA(pkey, rsakey)))
fatal('Could not assign RSA key to EVP object');
// create request object

How To Generate Rsa Key Pair

//
if (!(req = X509_REQ_new()))
fatal('Failed to create X509_REQ object');
X509_REQ_set_pubkey(req, pkey);
// create and fill in subject object
//
if (!(subj = X509_NAME_new()))
fatal('Failed to create X509_NAME object');
for (i = 0; i < ENTRIES; i++)
{
int nid; // ASN numeric identifier
X509_NAME_ENTRY *ent;
if ((nid = OBJ_txt2nid(entries[i].key)) NID_undef)
{
fprintf(stderr, 'Error finding NID for %sn', entries[i].key);
fatal('Error on lookup');
}
if (!(ent = X509_NAME_ENTRY_create_by_NID(NULL, nid, MBSTRING_ASC,
entries[i].value, - 1)))
fatal('Error creating Name entry from NID');
if (X509_NAME_add_entry(subj, ent, -1, 0) != 1)
fatal('Error adding entry to Name');
}
if (X509_REQ_set_subject_name(req, subj) != 1)
fatal('Error adding subject to request');
// request is filled in and contains our generated public key;
// now sign it
//
digest = (EVP_MD *)EVP_sha1();
if (!(X509_REQ_sign(req, pkey, digest)))
fatal('Error signing request');
// write output files
//
if (!(fp = fopen(REQ_FILE, 'w')))
fatal('Error writing to request file');
if (PEM_write_X509_REQ(fp, req) != 1)
fatal('Error while writing request');
fclose(fp);
if (!(fp = fopen(KEY_FILE, 'w')))

Openssl Generate Rsa Key Pair Programmatically Free

fatal('Error writing to private key file');
if (PEM_write_PrivateKey(fp, pkey, NULL, NULL, 0, 0, NULL) != 1)
fatal('Error while writing private key');
fclose(fp);
EVP_PKEY_free(pkey);
X509_REQ_free(req);
return 0;

Use Openssl To Generate Key Pair

}

Openssl Generate Rsa Key Pair Programmatically In C