IOS RSA encryption decryption and signature verification

1. To download OpenSSL first, this needless to say, download directly from the official website or download with the brew install OpenSSL

2. Terminal generates private key key

2.1 Generating the private key

OpenSSL Genrsa-out1024x768

2.2 Generate key

OpenSSL RSA- in Rsa_private_key.pem-pubout- out Rsa_public_key.pem

2.3 Convert the RSA private key to PKCS8 format

OpenSSL pkcs8-topk8-inform PEM- in Rsa_private_key.pem-outform pem-nocrypt- out Rsa_private_key.pem

Private key and key address in root directory file Rsa_private_key.pem Rsa_public_key.pem

Ask price can be opened by right-click File Editor View

You can also view the private key string by using the terminal commands Cat Rsa_private_key.pem and Cat Rsa_pubilic_key.pem

3. Import OpenSSL, import the Hbrsahandler folder

Tip: Drag it in: Librarysearchpath: Automatically set, then copy the path to Headsearchpath, and add/include behind it.

4. Use:

Two ways to import the key and then call the appropriate method.

nsstring* private_key_string =@"miicdqibadanbgkqhkig9w0baqefaascal8wggjbageaaogbalgv/syfh337kzc29kvr0p6cp+glrqjdyaqno5ifafxzjgf1ehbjzblkv+ hilaznbolyu1pnluookzj6pg1a5huzlpsbya5mwr1buhaljxlab3thcpzx51/b5l14ergo52jv/j/63yljetmm8almky8s+3fpxfey7ya+ 2vxmetplagmbaaecgyaguvauzwgpq37zuy+7clfa061plyau8tkyw+ qabqonupdqtq4vf3s2lqbwhzikvcxvovb70nm0onsisjfb1xjbpyfdbfug7d+y2f8yr6atoezoy5dbyef3svg9kp9ra+vvayx/7fh+ thcu0hovp0z8ikzirswzaq+3a2gicijrwqjbapkvji89hgamewljjfzapilbqzuwr2w/ rp7ely5ddkfjcoshhgghfob71bnrmom0h4s85gx6a87n9r2to0c51q0cqqdcx6yydt/ 9jgorynsxfzmfszyvormpio77r0ywka3uowwla56l2lc4ayo10/lyayzckse2/5d9zzub7xoyemgzakb8mejvpuoy/ bsc3rqenrjetersawzaobjcx4oac3agtxmhwv1fmqfbfktodbddze+ijedm/zlzmhhtbtstkjgvakbkma/ Dghrtuscit90qhbjb3f3fhjb4pbpcyzkscqmxxmy73/lg0ktxqnujlyy4zm6jnim0ozgroq6chgkubfezakbmcgf2tpfejh8xodovlw5adnuiq +QE/ABCPKOWKIT9ZP+RYT9XJAX7QXCHJDWTZB6AHNJY1+NY1EMEHUOS2FM8"; NSString* Public_key_string =@"migfma0gcsqgsib3dqebaquaa4gnadcbiqkbgqc4l/7mhr99+yswtvsr0dkend/ojuaow2aej6oyn2n12y4h9riqy2w5sr/ h4iwmzqtpwfnt5y7jjpgy+qynqor1gs6bg2gutmk9w1bwc41y2gd0xwqwv+df2+s9ehqxqodib/4/+ T2jyxltjvac5pgpevt3z8rxmo8mvtlvzblazqidaqab"; NSString*publickeyfilepath = [[NSBundle mainbundle] Pathforresource:@"Rsa_public_key.pem"Oftype:nil]; NSString*privatekeyfilepath = [[NSBundle mainbundle] Pathforresource:@"Rsa_private_key.pem"Oftype:nil]; Hbrsahandler* Handler = [HbrsahandlerNew];//two ways of importing//[Handler Importkeywithtype:keytypepublic Andpath:publickeyfilepath]; //[Handler Importkeywithtype:keytypeprivate Andpath:privatekeyfilepath];[Handler Importkeywithtype:keytypeprivate andkeystring:private_key_string];   [Handler Importkeywithtype:keytypepublic andkeystring:public_key_string]; NSString* sig = [Handler signstring:@"Signature String"]; NSString* SigMd5 = [Handler signmd5string:@"Signature String"]; NSLog (@"%@      %@", SIG,SIGMD5); BOOL IsMatch= [Handler verifystring:@"Signature String"Withsign:sig]; BOOL IsMatchMd5= [Handler verifymd5string:@"Signature String NSLog (@"%d%d", ISMATCH,ISMATCHMD5);NSString* Enstring = [Handler Encryptwithpublickey:@"Encrypt string"]; NSString* Destring =[Handler decryptwithprivateckey:enstring]; NSLog (@"%@", destring);

4 Result Verification (note: Public key encryption, the result of each encryption will be different, but the result of the private key signature is the same every time)

Iosrsahandler-master.zip

IOS RSA encryption decryption and signature verification