PHP RSA encryption and decryption using _php tutorial

How to use PHP RSA encryption and decryption

　How to use PHP RSA encryption and decryption

This article mainly introduces the PHP RSA encryption and decryption using method, this article explains the generated public key, the private key and PHP use generated public key, private key to encrypt and decrypt instances, the need for friends can refer to the following

When the PHP server interacts with the client and provides an open API, it is often necessary to encrypt the sensitive part of the API data transfer, at which point RSA Asymmetric encryption can be used, and an example to illustrate how to use PHP to encrypt and decrypt data.

1, the first step of encryption and decryption is to generate a public key, a private key pair, the private key encrypted content can be decrypted by the public key (in turn, can also)

Download the open source RSA key generation tool OpenSSL (usually the Linux system comes with the program), unzip to a separate folder, enter the Bin directory, and execute the following command:

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OpenSSL genrsa-out Rsa_private_key.pem 1024 OpenSSL pkcs8-topk8-inform pem-in rsa_private_key.pem-outform pem-nocrypt-out Private_key.pem OpenSSL rsa-in rsa_private_key.pem-pubout-out Rsa_public_key.pem

The first command generates the original RSA private key file Rsa_private_key.pem, the second command converts the original RSA private key to the PKCS8 format, and the third generates the RSA public key Rsa_public_key.pem

From the above, we can generate the corresponding public key through the private key, so we use the private key Private_key.pem on the server side, the public key is issued to the Android and iOS and other front

2, PHP with the generated public key, the private key for encryption and decryption, directly on the code

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$private _key = '-----BEGIN RSA private Key----- Miicxqibaakbgqc3//sr2txw0wrc2dysx8vnglqt3y7ldu9+lbli6e1ks5lfc5jl tgf7kbtskchbm3ouehwqp1zj85ije59af5gib2klbd6h4wrbbha2xe1sq21ykja/ Gqx7/iria3zqfxgv/qekygox+xalvoolzqdwh76o2n1vp1d+td3amhsk7qidaqab Aogbakh14bmitesqd4pywodwmy7rrrvyfpenjjtecljvkb7ikrvxvdkp1xijngkh 2h5syhq5qslpsgyj1m/xkdnginwalvhvd3bokkgkg1bzn7ao5pxt+herqxavwws6 Ga63yvsic8jcodxiuvxjnumqrlaqof6aub/2vwc2t5mdmxlhakea3pwgpvxgliwl 3h7qlyzlrlrbfrurn4cyl4uyaakokkavzly04glle8ycgoc2dzl4eil4l/+x/gaq deju/chlrqjbanozy0meovkwhu4bscsdnfm6usqowybewhyyh/otv1a3sqcce1f+ qbaclcqenihajccdmgyj53lfigyv0wcs54kcqaxapkahclrkqladquv5iwyyj25f Oiq+y8sgccs73qixru1ypjy9yka/meg9smsl4oh9ioigi+zuygh9ydsmeq0cqqc2 4g3ip2g3lndrdzim5nz7pfnmyrabxk/ugvuwdk47iwtzhfkdhxkfc8qepuhbsahl Qjifgxy4ejkubm3fpdgjakafwuxyssijjvrhwnhfbg0rfkvvy63osmnrxil4x6ey yi9lblcsyfpl25l7l5zmjrahn45zaioobrwqpm5edu7c -----END RSA PRIVATE KEY-----'; $public _key = '-----BEGIN Public Key----- Migfma0gcsqgsib3dqebaquaa4gnadcbiqkbgqc3//sr2txw0wrc2dysx8vnglqt 3y7ldu9+lbli6e1ks5lfc5jltgf7kbtskchbm3ouehwqp1zj85ije59af5gib2kl bd6h4wrbbha2xe1sq21ykja/gqx7/iria3zqfxgv/qekygox+xalvoolzqdwh76o 2n1vp1d+td3amhsk7qidaqab -----END Public KEY-----'; echo $private _key; $pi _key = openssl_pkey_get_private ($private _key);//This function can be used to determine if the private key is available, return the resource ID Resource ID $pu _key = openssl_pkey_get_public ($public _key);//This function can be used to determine whether the public key is available Print_r ($pi _key); echo "\ n"; Print_r ($pu _key); echo "\ n"; $data = "AASSSSASSSDDD";//RAW data $encrypted = ""; $decrypted = ""; echo "Source data:", $data, "\ n"; echo "Private key encrypt:\n"; Openssl_private_encrypt ($data, $encrypted, $pi _key);//private key encryption $encrypted = Base64_encode ($encrypted);//The contents of the encryption usually contain special characters, need to encode the conversion, the transmission between the network through the URL to pay attention to base64 encoding is URL-safe echo $encrypted, "\ n"; echo "Public key decrypt:\n"; Openssl_public_decrypt (Base64_decode ($encrypted), $decrypted, $pu _key);//private key encrypted content can be decrypted by public key echo $decrypted, "\ n"; echo "---------------------------------------\ n"; echo "Public key encrypt:\n"; Openssl_public_encrypt ($data, $encrypted, $pu _key);//Public key encryption $encrypted = Base64_encode ($encrypted); echo $encrypted, "\ n"; echo "Private key decrypt:\n"; Openssl_private_decrypt (Base64_decode ($encrypted), $decrypted, $pi _key);//private key decryption echo $decrypted, "\ n";

　

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