<doc> <legacy_id></legacy_id> <name>decrypt using rsa</name> <type>command</type> <syntax> <example>decrypt <i>source</i> using rsa with {public | private} key <i>key</i> [and passphrase <i>passphrase </i>]</example> </syntax> <synonyms> </synonyms> <summary></summary> <examples><example>decrypt tMessage with public key tPublicKey</example><example>decrypt field 1 with private key tPrivateKey</example> </examples> <history> <introduced version="4.6">Added.</introduced> <deprecated version=""></deprecated> <removed version=""></removed> <experimental version=""></experimental> <nonexperimental version=""></nonexperimental> </history> <objects> </objects> <platforms> <mac/> <windows/> <linux/> <ios/> <android/> </platforms> <classes> <desktop/> <server/> <web/> <mobile/> </classes> <security> <network/> </security> <classification> </classification> <references> <command tag="encrypt">encrypt Command</command> <command tag="decrypt">decrypt Command</command> <command tag="encrypt using rsa">encrypt using rsa Command</command> </references> <description> <overview>Use the <b>decrypt using rsa</b> command to decrypt a message using RSA public key encryption.</overview> <parameters> <parameter>The <i>message</i> is the message to be decrypted</parameter> <parameter>The <i>key</i> is the key to be used for the decryption, in PEM format</parameter> <parameter>The <i>passphrase </i>is an optional passphrase</parameter> </parameters> <value></value> <comments>Use the form<p>&#9;decrypt <i>message</i> with private key <i>key</i></p><p>to decode a message that a sender has encrypted with its corresponding public key.</p><p></p><p>Use the form</p><p>&#9;decrypt <i>message</i> with public key <i>key</i></p><p>to verify that a message has been encoded with the corresponding private key, and there has come from one of its holders (this is a verify operation).</p><p></p><p><b>Generating key pairs</b></p><p>Public-private key pairs can be generated using the OpenSSL suite of command-line tools. For example:</p><p>&#9;openssl genrsa -out private_key.pem 512</p><p>&#9;openssl rsa -pubout -in private_key.pem -out public_key.pem</p><p>Will generate a key pair of size 512-bits, placing the private key in private_key.pem and the public key in public_key.pem.</p><p></p><p>For more information on these utilities see http://www.openssl.org/docs/apps/rsa.html and http://www.openssl.org/docs/apps/genrsa.html.</p></comments> </description></doc>