RSA数据加密解密（各种语言）
2024-04-19 23:33:34
RSA数据加密解密文档
增强数据传输与本地日志的数据安全数据加密方式
使用rsa加密算法，客户端公钥加密，服务端私钥解密
(若单次传输数据量过大，之后可引入aes rsa只加密iv部分)
数据加密步骤
示例代码为python
1.使用zlib压缩目标数据
eg:
import zlib
m = zlib.compress(message)2.rsa 私钥为1024bit，需将被密数据做分割处理
eg:
def format_str(string, width):format_list = [string[x:x+width] for x in range(0,len(string),width)]return format_liststr_list = format_str(m,117)3.使用私钥加密,base64 encode数据并将\n替换为约定字符串(#dmp#),最后将list按约定分隔符(#fp#)合并为字符串
eg:
data_list = []
for _str in str_list:data_list.append(base64.encodestring(rsa.encrypt(_str, pubkey)).replace('\n','#dmp#'))encrypt_str = "#fp#".join(data_list)数据解密步骤
示例代码为python
1.将加密的最终结果按照约定分隔符(#xxd#)拆解为list,将约定字符串(#dmp#)还原为\n,base64 decode数据,最后使用私钥解密
eg:
data_list = encrypt_str.split("#fp#")
for data in data_list:_data_list.append(rsa.decrypt(base64.decodestring(data.replace('#dmp#','\n')), privkey))
2.合并list，使用zlib解压数据
eg:
d = zlib.decompress("".join(_rsa_list))
print d
跨平台方案
使用预先生成各平台key的方式，规避跨平台问题
生成模长为1024bit的私钥文件private_key.pem
openssl genrsa -out private_key.pem 1024生成IOS证书
生成证书请求文件rsaCertReq.csr
openssl req -new -key private_key.pem -out rsaCerReq.csr生成证书rsaCert.crt，并设置有效时间为10年
openssl x509 -req -days 36500 -in rsaCerReq.csr -signkey private_key.pem -out rsaCert.crt生成供iOS使用的公钥文件public_key.der
openssl x509 -outform der -in rsaCert.crt -out public_key.der生成供iOS使用的私钥文件private_key.p12
openssl pkcs12 -export -out private_key.p12 -inkey private_key.pem -in rsaCert.crt生成供Java使用的私钥pkcs8_private_key.pem
openssl pkcs8 -topk8 -in private_key.pem -out pkcs8_private_key.pem -nocrypt生成通用公钥rsa_public_key.pem
openssl rsa -in private_key.pem -out rsa_public_key.pem -pubout生成rsa公钥 供python等使用 py_public_key.pem
openssl rsa -in private_key.pem -RSAPublicKey_out -out py_public_key.pem IOS RSA代码
#import <Foundation/Foundation.h>@interface RSAEncryptor : NSObject
/*** 加密方法** @param str 需要加密的字符串* @param path '.der'格式的公钥文件路径*/
+ (NSString *)encryptString:(NSString *)str publicKeyWithContentsOfFile:(NSString *)path;/*** 解密方法** @param str 需要解密的字符串* @param path '.p12'格式的私钥文件路径* @param password 私钥文件密码*/
+ (NSString *)decryptString:(NSString *)str privateKeyWithContentsOfFile:(NSString *)path password:(NSString *)password;/*** 加密方法** @param str 需要加密的字符串* @param pubKey 公钥字符串*/
+ (NSString *)encryptString:(NSString *)str publicKey:(NSString *)pubKey;/*** 解密方法** @param str 需要解密的字符串* @param privKey 私钥字符串*/
+ (NSString *)decryptString:(NSString *)str privateKey:(NSString *)privKey;
@end#import "RSAEncryptor.h"
#import <Security/Security.h>static NSString *base64_encode_data(NSData *data){data = [data base64EncodedDataWithOptions:0];NSString *ret = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];return ret;
}static NSData *base64_decode(NSString *str){NSData *data = [[NSData alloc] initWithBase64EncodedString:str options:NSDataBase64DecodingIgnoreUnknownCharacters];return data;
}@implementation RSAEncryptor//加密
+ (NSString *)encryptString:(NSString *)str publicKeyWithContentsOfFile:(NSString *)path{if (!str || !path) return nil;return [self encryptString:str publicKeyRef:[self getPublicKeyRefWithContentsOfFile:path]];
}//获取公钥
+ (SecKeyRef)getPublicKeyRefWithContentsOfFile:(NSString *)filePath{NSData *certData = [NSData dataWithContentsOfFile:filePath];if (!certData) {return nil;}SecCertificateRef cert = SecCertificateCreateWithData(NULL, (CFDataRef)certData);SecKeyRef key = NULL;SecTrustRef trust = NULL;SecPolicyRef policy = NULL;if (cert != NULL) {policy = SecPolicyCreateBasicX509();if (policy) {if (SecTrustCreateWithCertificates((CFTypeRef)cert, policy, &trust) == noErr) {SecTrustResultType result;if (SecTrustEvaluate(trust, &result) == noErr) {key = SecTrustCopyPublicKey(trust);}}}}if (policy) CFRelease(policy);if (trust) CFRelease(trust);if (cert) CFRelease(cert);return key;
}+ (NSString *)encryptString:(NSString *)str publicKeyRef:(SecKeyRef)publicKeyRef{if(![str dataUsingEncoding:NSUTF8StringEncoding]){return nil;}if(!publicKeyRef){return nil;}NSData *data = [self encryptData:[str dataUsingEncoding:NSUTF8StringEncoding] withKeyRef:publicKeyRef];NSString *ret = base64_encode_data(data);return ret;
}#pragma mark - 使用'.12'私钥文件解密//解密
+ (NSString *)decryptString:(NSString *)str privateKeyWithContentsOfFile:(NSString *)path password:(NSString *)password{if (!str || !path) return nil;if (!password) password = @"";return [self decryptString:str privateKeyRef:[self getPrivateKeyRefWithContentsOfFile:path password:password]];
}//获取私钥
+ (SecKeyRef)getPrivateKeyRefWithContentsOfFile:(NSString *)filePath password:(NSString*)password{NSData *p12Data = [NSData dataWithContentsOfFile:filePath];if (!p12Data) {return nil;}SecKeyRef privateKeyRef = NULL;NSMutableDictionary * options = [[NSMutableDictionary alloc] init];[options setObject: password forKey:(__bridge id)kSecImportExportPassphrase];CFArrayRef items = CFArrayCreate(NULL, 0, 0, NULL);OSStatus securityError = SecPKCS12Import((__bridge CFDataRef) p12Data, (__bridge CFDictionaryRef)options, &items);if (securityError == noErr && CFArrayGetCount(items) > 0) {CFDictionaryRef identityDict = CFArrayGetValueAtIndex(items, 0);SecIdentityRef identityApp = (SecIdentityRef)CFDictionaryGetValue(identityDict, kSecImportItemIdentity);securityError = SecIdentityCopyPrivateKey(identityApp, &privateKeyRef);if (securityError != noErr) {privateKeyRef = NULL;}}CFRelease(items);return privateKeyRef;
}+ (NSString *)decryptString:(NSString *)str privateKeyRef:(SecKeyRef)privKeyRef{NSData *data = [[NSData alloc] initWithBase64EncodedString:str options:NSDataBase64DecodingIgnoreUnknownCharacters];if (!privKeyRef) {return nil;}data = [self decryptData:data withKeyRef:privKeyRef];NSString *ret = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];return ret;
}#pragma mark - 使用公钥字符串加密/* START: Encryption with RSA public key *///使用公钥字符串加密
+ (NSString *)encryptString:(NSString *)str publicKey:(NSString *)pubKey{NSData *data = [self encryptData:[str dataUsingEncoding:NSUTF8StringEncoding] publicKey:pubKey];NSString *ret = base64_encode_data(data);return ret;
}+ (NSData *)encryptData:(NSData *)data publicKey:(NSString *)pubKey{if(!data || !pubKey){return nil;}SecKeyRef keyRef = [self addPublicKey:pubKey];if(!keyRef){return nil;}return [self encryptData:data withKeyRef:keyRef];
}+ (SecKeyRef)addPublicKey:(NSString *)key{NSRange spos = [key rangeOfString:@"-----BEGIN PUBLIC KEY-----"];NSRange epos = [key rangeOfString:@"-----END PUBLIC KEY-----"];if(spos.location != NSNotFound && epos.location != NSNotFound){NSUInteger s = spos.location + spos.length;NSUInteger e = epos.location;NSRange range = NSMakeRange(s, e-s);key = [key substringWithRange:range];}key = [key stringByReplacingOccurrencesOfString:@"\r" withString:@""];key = [key stringByReplacingOccurrencesOfString:@"\n" withString:@""];key = [key stringByReplacingOccurrencesOfString:@"\t" withString:@""];key = [key stringByReplacingOccurrencesOfString:@" " withString:@""];// This will be base64 encoded, decode it.NSData *data = base64_decode(key);data = [self stripPublicKeyHeader:data];if(!data){return nil;}//a tag to read/write keychain storageNSString *tag = @"RSAUtil_PubKey";NSData *d_tag = [NSData dataWithBytes:[tag UTF8String] length:[tag length]];// Delete any old lingering key with the same tagNSMutableDictionary *publicKey = [[NSMutableDictionary alloc] init];[publicKey setObject:(__bridge id) kSecClassKey forKey:(__bridge id)kSecClass];[publicKey setObject:(__bridge id) kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];[publicKey setObject:d_tag forKey:(__bridge id)kSecAttrApplicationTag];SecItemDelete((__bridge CFDictionaryRef)publicKey);// Add persistent version of the key to system keychain[publicKey setObject:data forKey:(__bridge id)kSecValueData];[publicKey setObject:(__bridge id) kSecAttrKeyClassPublic forKey:(__bridge id)kSecAttrKeyClass];[publicKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnPersistentRef];CFTypeRef persistKey = nil;OSStatus status = SecItemAdd((__bridge CFDictionaryRef)publicKey, &persistKey);if (persistKey != nil){CFRelease(persistKey);}if ((status != noErr) && (status != errSecDuplicateItem)) {return nil;}[publicKey removeObjectForKey:(__bridge id)kSecValueData];[publicKey removeObjectForKey:(__bridge id)kSecReturnPersistentRef];[publicKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef];[publicKey setObject:(__bridge id) kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];// Now fetch the SecKeyRef version of the keySecKeyRef keyRef = nil;status = SecItemCopyMatching((__bridge CFDictionaryRef)publicKey, (CFTypeRef *)&keyRef);if(status != noErr){return nil;}return keyRef;
}+ (NSData *)stripPublicKeyHeader:(NSData *)d_key{// Skip ASN.1 public key headerif (d_key == nil) return(nil);unsigned long len = [d_key length];if (!len) return(nil);unsigned char *c_key = (unsigned char *)[d_key bytes];unsigned int idx = 0;if (c_key[idx++] != 0x30) return(nil);if (c_key[idx] > 0x80) idx += c_key[idx] - 0x80 + 1;else idx++;// PKCS #1 rsaEncryption szOID_RSA_RSAstatic unsigned char seqiod[] ={ 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01,0x01, 0x05, 0x00 };if (memcmp(&c_key[idx], seqiod, 15)) return(nil);idx += 15;if (c_key[idx++] != 0x03) return(nil);if (c_key[idx] > 0x80) idx += c_key[idx] - 0x80 + 1;else idx++;if (c_key[idx++] != '\0') return(nil);// Now make a new NSData from this bufferreturn ([NSData dataWithBytes:&c_key[idx] length:len - idx]);
}+ (NSData *)encryptData:(NSData *)data withKeyRef:(SecKeyRef) keyRef{const uint8_t *srcbuf = (const uint8_t *)[data bytes];size_t srclen = (size_t)data.length;size_t block_size = SecKeyGetBlockSize(keyRef) * sizeof(uint8_t);void *outbuf = malloc(block_size);size_t src_block_size = block_size - 11;NSMutableData *ret = [[NSMutableData alloc] init];for(int idx=0; idx<srclen; idx+=src_block_size){//NSLog(@"%d/%d block_size: %d", idx, (int)srclen, (int)block_size);size_t data_len = srclen - idx;if(data_len > src_block_size){data_len = src_block_size;}size_t outlen = block_size;OSStatus status = noErr;status = SecKeyEncrypt(keyRef,kSecPaddingPKCS1,srcbuf + idx,data_len,outbuf,&outlen);if (status != 0) {NSLog(@"SecKeyEncrypt fail. Error Code: %d", status);ret = nil;break;}else{[ret appendBytes:outbuf length:outlen];}}free(outbuf);CFRelease(keyRef);return ret;
}/* END: Encryption with RSA public key */#pragma mark - 使用私钥字符串解密/* START: Decryption with RSA private key *///使用私钥字符串解密
+ (NSString *)decryptString:(NSString *)str privateKey:(NSString *)privKey{if (!str) return nil;NSData *data = [[NSData alloc] initWithBase64EncodedString:str options:NSDataBase64DecodingIgnoreUnknownCharacters];data = [self decryptData:data privateKey:privKey];NSString *ret = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];return ret;
}+ (NSData *)decryptData:(NSData *)data privateKey:(NSString *)privKey{if(!data || !privKey){return nil;}SecKeyRef keyRef = [self addPrivateKey:privKey];if(!keyRef){return nil;}return [self decryptData:data withKeyRef:keyRef];
}+ (SecKeyRef)addPrivateKey:(NSString *)key{NSRange spos = [key rangeOfString:@"-----BEGIN RSA PRIVATE KEY-----"];NSRange epos = [key rangeOfString:@"-----END RSA PRIVATE KEY-----"];if(spos.location != NSNotFound && epos.location != NSNotFound){NSUInteger s = spos.location + spos.length;NSUInteger e = epos.location;NSRange range = NSMakeRange(s, e-s);key = [key substringWithRange:range];}key = [key stringByReplacingOccurrencesOfString:@"\r" withString:@""];key = [key stringByReplacingOccurrencesOfString:@"\n" withString:@""];key = [key stringByReplacingOccurrencesOfString:@"\t" withString:@""];key = [key stringByReplacingOccurrencesOfString:@" " withString:@""];// This will be base64 encoded, decode it.NSData *data = base64_decode(key);data = [self stripPrivateKeyHeader:data];if(!data){return nil;}//a tag to read/write keychain storageNSString *tag = @"RSAUtil_PrivKey";NSData *d_tag = [NSData dataWithBytes:[tag UTF8String] length:[tag length]];// Delete any old lingering key with the same tagNSMutableDictionary *privateKey = [[NSMutableDictionary alloc] init];[privateKey setObject:(__bridge id) kSecClassKey forKey:(__bridge id)kSecClass];[privateKey setObject:(__bridge id) kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];[privateKey setObject:d_tag forKey:(__bridge id)kSecAttrApplicationTag];SecItemDelete((__bridge CFDictionaryRef)privateKey);// Add persistent version of the key to system keychain[privateKey setObject:data forKey:(__bridge id)kSecValueData];[privateKey setObject:(__bridge id) kSecAttrKeyClassPrivate forKey:(__bridge id)kSecAttrKeyClass];[privateKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnPersistentRef];CFTypeRef persistKey = nil;OSStatus status = SecItemAdd((__bridge CFDictionaryRef)privateKey, &persistKey);if (persistKey != nil){CFRelease(persistKey);}if ((status != noErr) && (status != errSecDuplicateItem)) {return nil;}[privateKey removeObjectForKey:(__bridge id)kSecValueData];[privateKey removeObjectForKey:(__bridge id)kSecReturnPersistentRef];[privateKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef];[privateKey setObject:(__bridge id) kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];// Now fetch the SecKeyRef version of the keySecKeyRef keyRef = nil;status = SecItemCopyMatching((__bridge CFDictionaryRef)privateKey, (CFTypeRef *)&keyRef);if(status != noErr){return nil;}return keyRef;
}+ (NSData *)stripPrivateKeyHeader:(NSData *)d_key{// Skip ASN.1 private key headerif (d_key == nil) return(nil);unsigned long len = [d_key length];if (!len) return(nil);unsigned char *c_key = (unsigned char *)[d_key bytes];unsigned int idx = 22; //magic byte at offset 22if (0x04 != c_key[idx++]) return nil;//calculate length of the keyunsigned int c_len = c_key[idx++];int det = c_len & 0x80;if (!det) {c_len = c_len & 0x7f;} else {int byteCount = c_len & 0x7f;if (byteCount + idx > len) {//rsa length field longer than bufferreturn nil;}unsigned int accum = 0;unsigned char *ptr = &c_key[idx];idx += byteCount;while (byteCount) {accum = (accum << 8) + *ptr;ptr++;byteCount--;}c_len = accum;}// Now make a new NSData from this bufferreturn [d_key subdataWithRange:NSMakeRange(idx, c_len)];
}+ (NSData *)decryptData:(NSData *)data withKeyRef:(SecKeyRef) keyRef{const uint8_t *srcbuf = (const uint8_t *)[data bytes];size_t srclen = (size_t)data.length;size_t block_size = SecKeyGetBlockSize(keyRef) * sizeof(uint8_t);UInt8 *outbuf = malloc(block_size);size_t src_block_size = block_size;NSMutableData *ret = [[NSMutableData alloc] init];for(int idx=0; idx<srclen; idx+=src_block_size){//NSLog(@"%d/%d block_size: %d", idx, (int)srclen, (int)block_size);size_t data_len = srclen - idx;if(data_len > src_block_size){data_len = src_block_size;}size_t outlen = block_size;OSStatus status = noErr;status = SecKeyDecrypt(keyRef,kSecPaddingNone,srcbuf + idx,data_len,outbuf,&outlen);if (status != 0) {NSLog(@"SecKeyEncrypt fail. Error Code: %d", status);ret = nil;break;}else{//the actual decrypted data is in the middle, locate it!int idxFirstZero = -1;int idxNextZero = (int)outlen;for ( int i = 0; i < outlen; i++ ) {if ( outbuf[i] == 0 ) {if ( idxFirstZero < 0 ) {idxFirstZero = i;} else {idxNextZero = i;break;}}}[ret appendBytes:&outbuf[idxFirstZero+1] length:idxNextZero-idxFirstZero-1];}}free(outbuf);CFRelease(keyRef);return ret;
}Python RSA代码
import rsa
import base64# 导入key
with open('py_public_key.pem') as publickfile:p = publickfile.read()pubkey = rsa.PublicKey.load_pkcs1(p)with open('private_key.pem') as privatefile:p = privatefile.read()privkey = rsa.PrivateKey.load_pkcs1(p)bob_pub = pubkey
bob_priv = privkeymessage = """{"id": "49187f817657ecd9d472562b16c0ec7c","ip": "180.168.161.194","user-agent": "iOS8.1 iPhone 5s","ts": "1478879016008","channel": "iOS"}"""# 数据分割函数
def format_str(string, width):format_list = [string[x:x+width] for x in range(0,len(string),width)]return format_list# 按大小分割数据
str_list = format_str(message,117)# 加密
data_list = []
for _str in str_list:data_list.append(base64.encodestring(rsa.encrypt(_str, bob_pub)))# 解密
_data_list = []
for data in data_list.append:_data_list.append(rsa.decrypt(base64.decodestring(data), bob_priv))_message = "".join(_data_list.append)
print _messageJAVA RSA代码
RSA数据加密解密文档
增强数据传输与本地日志的数据安全数据加密方式
使用rsa加密算法，客户端公钥加密，服务端私钥解密
(若单次传输数据量过大，之后可引入aes rsa只加密iv部分)
数据加密步骤
示例代码为python
1.使用zlib压缩目标数据
eg:
import zlib
m = zlib.compress(message)2.rsa 私钥为1024bit，需将被密数据做分割处理
eg:
def format_str(string, width):format_list = [string[x:x+width] for x in range(0,len(string),width)]return format_liststr_list = format_str(m,117)3.使用私钥加密,base64 encode数据并将\n替换为约定字符串(#dmp#),最后将list按约定分隔符(#fp#)合并为字符串
eg:
data_list = []
for _str in str_list:data_list.append(base64.encodestring(rsa.encrypt(_str, pubkey)).replace('\n','#dmp#'))encrypt_str = "#fp#".join(data_list)数据解密步骤
示例代码为python
1.将加密的最终结果按照约定分隔符(#xxd#)拆解为list,将约定字符串(#dmp#)还原为\n,base64 decode数据,最后使用私钥解密
eg:
data_list = encrypt_str.split("#fp#")
for data in data_list:_data_list.append(rsa.decrypt(base64.decodestring(data.replace('#dmp#','\n')), privkey))
2.合并list，使用zlib解压数据
eg:
d = zlib.decompress("".join(_rsa_list))
print d
跨平台方案
使用预先生成各平台key的方式，规避跨平台问题
生成模长为1024bit的私钥文件private_key.pem
openssl genrsa -out private_key.pem 1024生成IOS证书
生成证书请求文件rsaCertReq.csr
openssl req -new -key private_key.pem -out rsaCerReq.csr生成证书rsaCert.crt，并设置有效时间为10年
openssl x509 -req -days 36500 -in rsaCerReq.csr -signkey private_key.pem -out rsaCert.crt生成供iOS使用的公钥文件public_key.der
openssl x509 -outform der -in rsaCert.crt -out public_key.der生成供iOS使用的私钥文件private_key.p12
openssl pkcs12 -export -out private_key.p12 -inkey private_key.pem -in rsaCert.crt生成供Java使用的私钥pkcs8_private_key.pem
openssl pkcs8 -topk8 -in private_key.pem -out pkcs8_private_key.pem -nocrypt生成通用公钥rsa_public_key.pem
openssl rsa -in private_key.pem -out rsa_public_key.pem -pubout生成rsa公钥 供python等使用 py_public_key.pem
openssl rsa -in private_key.pem -RSAPublicKey_out -out py_public_key.pem IOS RSA代码
#import <Foundation/Foundation.h>@interface RSAEncryptor : NSObject
/*** 加密方法** @param str 需要加密的字符串* @param path '.der'格式的公钥文件路径*/
+ (NSString *)encryptString:(NSString *)str publicKeyWithContentsOfFile:(NSString *)path;/*** 解密方法** @param str 需要解密的字符串* @param path '.p12'格式的私钥文件路径* @param password 私钥文件密码*/
+ (NSString *)decryptString:(NSString *)str privateKeyWithContentsOfFile:(NSString *)path password:(NSString *)password;/*** 加密方法** @param str 需要加密的字符串* @param pubKey 公钥字符串*/
+ (NSString *)encryptString:(NSString *)str publicKey:(NSString *)pubKey;/*** 解密方法** @param str 需要解密的字符串* @param privKey 私钥字符串*/
+ (NSString *)decryptString:(NSString *)str privateKey:(NSString *)privKey;
@end#import "RSAEncryptor.h"
#import <Security/Security.h>static NSString *base64_encode_data(NSData *data){data = [data base64EncodedDataWithOptions:0];NSString *ret = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];return ret;
}static NSData *base64_decode(NSString *str){NSData *data = [[NSData alloc] initWithBase64EncodedString:str options:NSDataBase64DecodingIgnoreUnknownCharacters];return data;
}@implementation RSAEncryptor//加密
+ (NSString *)encryptString:(NSString *)str publicKeyWithContentsOfFile:(NSString *)path{if (!str || !path) return nil;return [self encryptString:str publicKeyRef:[self getPublicKeyRefWithContentsOfFile:path]];
}//获取公钥
+ (SecKeyRef)getPublicKeyRefWithContentsOfFile:(NSString *)filePath{NSData *certData = [NSData dataWithContentsOfFile:filePath];if (!certData) {return nil;}SecCertificateRef cert = SecCertificateCreateWithData(NULL, (CFDataRef)certData);SecKeyRef key = NULL;SecTrustRef trust = NULL;SecPolicyRef policy = NULL;if (cert != NULL) {policy = SecPolicyCreateBasicX509();if (policy) {if (SecTrustCreateWithCertificates((CFTypeRef)cert, policy, &trust) == noErr) {SecTrustResultType result;if (SecTrustEvaluate(trust, &result) == noErr) {key = SecTrustCopyPublicKey(trust);}}}}if (policy) CFRelease(policy);if (trust) CFRelease(trust);if (cert) CFRelease(cert);return key;
}+ (NSString *)encryptString:(NSString *)str publicKeyRef:(SecKeyRef)publicKeyRef{if(![str dataUsingEncoding:NSUTF8StringEncoding]){return nil;}if(!publicKeyRef){return nil;}NSData *data = [self encryptData:[str dataUsingEncoding:NSUTF8StringEncoding] withKeyRef:publicKeyRef];NSString *ret = base64_encode_data(data);return ret;
}#pragma mark - 使用'.12'私钥文件解密//解密
+ (NSString *)decryptString:(NSString *)str privateKeyWithContentsOfFile:(NSString *)path password:(NSString *)password{if (!str || !path) return nil;if (!password) password = @"";return [self decryptString:str privateKeyRef:[self getPrivateKeyRefWithContentsOfFile:path password:password]];
}//获取私钥
+ (SecKeyRef)getPrivateKeyRefWithContentsOfFile:(NSString *)filePath password:(NSString*)password{NSData *p12Data = [NSData dataWithContentsOfFile:filePath];if (!p12Data) {return nil;}SecKeyRef privateKeyRef = NULL;NSMutableDictionary * options = [[NSMutableDictionary alloc] init];[options setObject: password forKey:(__bridge id)kSecImportExportPassphrase];CFArrayRef items = CFArrayCreate(NULL, 0, 0, NULL);OSStatus securityError = SecPKCS12Import((__bridge CFDataRef) p12Data, (__bridge CFDictionaryRef)options, &items);if (securityError == noErr && CFArrayGetCount(items) > 0) {CFDictionaryRef identityDict = CFArrayGetValueAtIndex(items, 0);SecIdentityRef identityApp = (SecIdentityRef)CFDictionaryGetValue(identityDict, kSecImportItemIdentity);securityError = SecIdentityCopyPrivateKey(identityApp, &privateKeyRef);if (securityError != noErr) {privateKeyRef = NULL;}}CFRelease(items);return privateKeyRef;
}+ (NSString *)decryptString:(NSString *)str privateKeyRef:(SecKeyRef)privKeyRef{NSData *data = [[NSData alloc] initWithBase64EncodedString:str options:NSDataBase64DecodingIgnoreUnknownCharacters];if (!privKeyRef) {return nil;}data = [self decryptData:data withKeyRef:privKeyRef];NSString *ret = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];return ret;
}#pragma mark - 使用公钥字符串加密/* START: Encryption with RSA public key *///使用公钥字符串加密
+ (NSString *)encryptString:(NSString *)str publicKey:(NSString *)pubKey{NSData *data = [self encryptData:[str dataUsingEncoding:NSUTF8StringEncoding] publicKey:pubKey];NSString *ret = base64_encode_data(data);return ret;
}+ (NSData *)encryptData:(NSData *)data publicKey:(NSString *)pubKey{if(!data || !pubKey){return nil;}SecKeyRef keyRef = [self addPublicKey:pubKey];if(!keyRef){return nil;}return [self encryptData:data withKeyRef:keyRef];
}+ (SecKeyRef)addPublicKey:(NSString *)key{NSRange spos = [key rangeOfString:@"-----BEGIN PUBLIC KEY-----"];NSRange epos = [key rangeOfString:@"-----END PUBLIC KEY-----"];if(spos.location != NSNotFound && epos.location != NSNotFound){NSUInteger s = spos.location + spos.length;NSUInteger e = epos.location;NSRange range = NSMakeRange(s, e-s);key = [key substringWithRange:range];}key = [key stringByReplacingOccurrencesOfString:@"\r" withString:@""];key = [key stringByReplacingOccurrencesOfString:@"\n" withString:@""];key = [key stringByReplacingOccurrencesOfString:@"\t" withString:@""];key = [key stringByReplacingOccurrencesOfString:@" " withString:@""];// This will be base64 encoded, decode it.NSData *data = base64_decode(key);data = [self stripPublicKeyHeader:data];if(!data){return nil;}//a tag to read/write keychain storageNSString *tag = @"RSAUtil_PubKey";NSData *d_tag = [NSData dataWithBytes:[tag UTF8String] length:[tag length]];// Delete any old lingering key with the same tagNSMutableDictionary *publicKey = [[NSMutableDictionary alloc] init];[publicKey setObject:(__bridge id) kSecClassKey forKey:(__bridge id)kSecClass];[publicKey setObject:(__bridge id) kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];[publicKey setObject:d_tag forKey:(__bridge id)kSecAttrApplicationTag];SecItemDelete((__bridge CFDictionaryRef)publicKey);// Add persistent version of the key to system keychain[publicKey setObject:data forKey:(__bridge id)kSecValueData];[publicKey setObject:(__bridge id) kSecAttrKeyClassPublic forKey:(__bridge id)kSecAttrKeyClass];[publicKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnPersistentRef];CFTypeRef persistKey = nil;OSStatus status = SecItemAdd((__bridge CFDictionaryRef)publicKey, &persistKey);if (persistKey != nil){CFRelease(persistKey);}if ((status != noErr) && (status != errSecDuplicateItem)) {return nil;}[publicKey removeObjectForKey:(__bridge id)kSecValueData];[publicKey removeObjectForKey:(__bridge id)kSecReturnPersistentRef];[publicKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef];[publicKey setObject:(__bridge id) kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];// Now fetch the SecKeyRef version of the keySecKeyRef keyRef = nil;status = SecItemCopyMatching((__bridge CFDictionaryRef)publicKey, (CFTypeRef *)&keyRef);if(status != noErr){return nil;}return keyRef;
}+ (NSData *)stripPublicKeyHeader:(NSData *)d_key{// Skip ASN.1 public key headerif (d_key == nil) return(nil);unsigned long len = [d_key length];if (!len) return(nil);unsigned char *c_key = (unsigned char *)[d_key bytes];unsigned int idx = 0;if (c_key[idx++] != 0x30) return(nil);if (c_key[idx] > 0x80) idx += c_key[idx] - 0x80 + 1;else idx++;// PKCS #1 rsaEncryption szOID_RSA_RSAstatic unsigned char seqiod[] ={ 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01,0x01, 0x05, 0x00 };if (memcmp(&c_key[idx], seqiod, 15)) return(nil);idx += 15;if (c_key[idx++] != 0x03) return(nil);if (c_key[idx] > 0x80) idx += c_key[idx] - 0x80 + 1;else idx++;if (c_key[idx++] != '\0') return(nil);// Now make a new NSData from this bufferreturn ([NSData dataWithBytes:&c_key[idx] length:len - idx]);
}+ (NSData *)encryptData:(NSData *)data withKeyRef:(SecKeyRef) keyRef{const uint8_t *srcbuf = (const uint8_t *)[data bytes];size_t srclen = (size_t)data.length;size_t block_size = SecKeyGetBlockSize(keyRef) * sizeof(uint8_t);void *outbuf = malloc(block_size);size_t src_block_size = block_size - 11;NSMutableData *ret = [[NSMutableData alloc] init];for(int idx=0; idx<srclen; idx+=src_block_size){//NSLog(@"%d/%d block_size: %d", idx, (int)srclen, (int)block_size);size_t data_len = srclen - idx;if(data_len > src_block_size){data_len = src_block_size;}size_t outlen = block_size;OSStatus status = noErr;status = SecKeyEncrypt(keyRef,kSecPaddingPKCS1,srcbuf + idx,data_len,outbuf,&outlen);if (status != 0) {NSLog(@"SecKeyEncrypt fail. Error Code: %d", status);ret = nil;break;}else{[ret appendBytes:outbuf length:outlen];}}free(outbuf);CFRelease(keyRef);return ret;
}/* END: Encryption with RSA public key */#pragma mark - 使用私钥字符串解密/* START: Decryption with RSA private key *///使用私钥字符串解密
+ (NSString *)decryptString:(NSString *)str privateKey:(NSString *)privKey{if (!str) return nil;NSData *data = [[NSData alloc] initWithBase64EncodedString:str options:NSDataBase64DecodingIgnoreUnknownCharacters];data = [self decryptData:data privateKey:privKey];NSString *ret = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];return ret;
}+ (NSData *)decryptData:(NSData *)data privateKey:(NSString *)privKey{if(!data || !privKey){return nil;}SecKeyRef keyRef = [self addPrivateKey:privKey];if(!keyRef){return nil;}return [self decryptData:data withKeyRef:keyRef];
}+ (SecKeyRef)addPrivateKey:(NSString *)key{NSRange spos = [key rangeOfString:@"-----BEGIN RSA PRIVATE KEY-----"];NSRange epos = [key rangeOfString:@"-----END RSA PRIVATE KEY-----"];if(spos.location != NSNotFound && epos.location != NSNotFound){NSUInteger s = spos.location + spos.length;NSUInteger e = epos.location;NSRange range = NSMakeRange(s, e-s);key = [key substringWithRange:range];}key = [key stringByReplacingOccurrencesOfString:@"\r" withString:@""];key = [key stringByReplacingOccurrencesOfString:@"\n" withString:@""];key = [key stringByReplacingOccurrencesOfString:@"\t" withString:@""];key = [key stringByReplacingOccurrencesOfString:@" " withString:@""];// This will be base64 encoded, decode it.NSData *data = base64_decode(key);data = [self stripPrivateKeyHeader:data];if(!data){return nil;}//a tag to read/write keychain storageNSString *tag = @"RSAUtil_PrivKey";NSData *d_tag = [NSData dataWithBytes:[tag UTF8String] length:[tag length]];// Delete any old lingering key with the same tagNSMutableDictionary *privateKey = [[NSMutableDictionary alloc] init];[privateKey setObject:(__bridge id) kSecClassKey forKey:(__bridge id)kSecClass];[privateKey setObject:(__bridge id) kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];[privateKey setObject:d_tag forKey:(__bridge id)kSecAttrApplicationTag];SecItemDelete((__bridge CFDictionaryRef)privateKey);// Add persistent version of the key to system keychain[privateKey setObject:data forKey:(__bridge id)kSecValueData];[privateKey setObject:(__bridge id) kSecAttrKeyClassPrivate forKey:(__bridge id)kSecAttrKeyClass];[privateKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnPersistentRef];CFTypeRef persistKey = nil;OSStatus status = SecItemAdd((__bridge CFDictionaryRef)privateKey, &persistKey);if (persistKey != nil){CFRelease(persistKey);}if ((status != noErr) && (status != errSecDuplicateItem)) {return nil;}[privateKey removeObjectForKey:(__bridge id)kSecValueData];[privateKey removeObjectForKey:(__bridge id)kSecReturnPersistentRef];[privateKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef];[privateKey setObject:(__bridge id) kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];// Now fetch the SecKeyRef version of the keySecKeyRef keyRef = nil;status = SecItemCopyMatching((__bridge CFDictionaryRef)privateKey, (CFTypeRef *)&keyRef);if(status != noErr){return nil;}return keyRef;
}+ (NSData *)stripPrivateKeyHeader:(NSData *)d_key{// Skip ASN.1 private key headerif (d_key == nil) return(nil);unsigned long len = [d_key length];if (!len) return(nil);unsigned char *c_key = (unsigned char *)[d_key bytes];unsigned int idx = 22; //magic byte at offset 22if (0x04 != c_key[idx++]) return nil;//calculate length of the keyunsigned int c_len = c_key[idx++];int det = c_len & 0x80;if (!det) {c_len = c_len & 0x7f;} else {int byteCount = c_len & 0x7f;if (byteCount + idx > len) {//rsa length field longer than bufferreturn nil;}unsigned int accum = 0;unsigned char *ptr = &c_key[idx];idx += byteCount;while (byteCount) {accum = (accum << 8) + *ptr;ptr++;byteCount--;}c_len = accum;}// Now make a new NSData from this bufferreturn [d_key subdataWithRange:NSMakeRange(idx, c_len)];
}+ (NSData *)decryptData:(NSData *)data withKeyRef:(SecKeyRef) keyRef{const uint8_t *srcbuf = (const uint8_t *)[data bytes];size_t srclen = (size_t)data.length;size_t block_size = SecKeyGetBlockSize(keyRef) * sizeof(uint8_t);UInt8 *outbuf = malloc(block_size);size_t src_block_size = block_size;NSMutableData *ret = [[NSMutableData alloc] init];for(int idx=0; idx<srclen; idx+=src_block_size){//NSLog(@"%d/%d block_size: %d", idx, (int)srclen, (int)block_size);size_t data_len = srclen - idx;if(data_len > src_block_size){data_len = src_block_size;}size_t outlen = block_size;OSStatus status = noErr;status = SecKeyDecrypt(keyRef,kSecPaddingNone,srcbuf + idx,data_len,outbuf,&outlen);if (status != 0) {NSLog(@"SecKeyEncrypt fail. Error Code: %d", status);ret = nil;break;}else{//the actual decrypted data is in the middle, locate it!int idxFirstZero = -1;int idxNextZero = (int)outlen;for ( int i = 0; i < outlen; i++ ) {if ( outbuf[i] == 0 ) {if ( idxFirstZero < 0 ) {idxFirstZero = i;} else {idxNextZero = i;break;}}}[ret appendBytes:&outbuf[idxFirstZero+1] length:idxNextZero-idxFirstZero-1];}}free(outbuf);CFRelease(keyRef);return ret;
}Python RSA代码
import rsa
import base64# 导入key
with open('py_public_key.pem') as publickfile:p = publickfile.read()pubkey = rsa.PublicKey.load_pkcs1(p)with open('private_key.pem') as privatefile:p = privatefile.read()privkey = rsa.PrivateKey.load_pkcs1(p)bob_pub = pubkey
bob_priv = privkeymessage = """{"id": "49187f817657ecd9d472562b16c0ec7c","ip": "180.168.161.194","user-agent": "iOS8.1 iPhone 5s","ts": "1478879016008","channel": "iOS"}"""# 数据分割函数
def format_str(string, width):format_list = [string[x:x+width] for x in range(0,len(string),width)]return format_list# 按大小分割数据
str_list = format_str(message,117)# 加密
data_list = []
for _str in str_list:data_list.append(base64.encodestring(rsa.encrypt(_str, bob_pub)))# 解密
_data_list = []
for data in data_list.append:_data_list.append(rsa.decrypt(base64.decodestring(data), bob_priv))_message = "".join(_data_list.append)
print _messageJAVA RSA代码
package rsa;import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.pkcs.RSAPrivateKeyStructure;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import java.io.*;
import java.security.*;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.RSAPrivateKeySpec;
import java.security.spec.X509EncodedKeySpec;public class RSAEncrypt {private static final String DEFAULT_PUBLIC_KEY ="MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQChDzcjw/rWgFwnxunbKp7/4e8w" + "\r" +"/UmXx2jk6qEEn69t6N2R1i/LmcyDT1xr/T2AHGOiXNQ5V8W4iCaaeNawi7aJaRht" + "\r" +"Vx1uOH/2U378fscEESEG8XDqll0GCfB1/TjKI2aitVSzXOtRs8kYgGU78f7VmDNg" + "\r" +"XIlk3gdhnzh+uoEQywIDAQAB" + "\r";private static final String DEFAULT_PRIVATE_KEY ="MIICdQIBADANBgkqhkiG9w0BAQEFAASCAl8wggJbAgEAAoGBAKEPNyPD+taAXCfG" + "\r" +"6dsqnv/h7zD9SZfHaOTqoQSfr23o3ZHWL8uZzINPXGv9PYAcY6Jc1DlXxbiIJpp4" + "\r" +"1rCLtolpGG1XHW44f/ZTfvx+xwQRIQbxcOqWXQYJ8HX9OMojZqK1VLNc61GzyRiA" + "\r" +"ZTvx/tWYM2BciWTeB2GfOH66gRDLAgMBAAECgYBp4qTvoJKynuT3SbDJY/XwaEtm" + "\r" +"u768SF9P0GlXrtwYuDWjAVue0VhBI9WxMWZTaVafkcP8hxX4QZqPh84td0zjcq3j" + "\r" +"DLOegAFJkIorGzq5FyK7ydBoU1TLjFV459c8dTZMTu+LgsOTD11/V/Jr4NJxIudo" + "\r" +"MBQ3c4cHmOoYv4uzkQJBANR+7Fc3e6oZgqTOesqPSPqljbsdF9E4x4eDFuOecCkJ" + "\r" +"DvVLOOoAzvtHfAiUp+H3fk4hXRpALiNBEHiIdhIuX2UCQQDCCHiPHFd4gC58yyCM" + "\r" +"6Leqkmoa+6YpfRb3oxykLBXcWx7DtbX+ayKy5OQmnkEG+MW8XB8wAdiUl0/tb6cQ" + "\r" +"FaRvAkBhvP94Hk0DMDinFVHlWYJ3xy4pongSA8vCyMj+aSGtvjzjFnZXK4gIjBjA" + "\r" +"2Z9ekDfIOBBawqp2DLdGuX2VXz8BAkByMuIh+KBSv76cnEDwLhfLQJlKgEnvqTvX" + "\r" +"TB0TUw8avlaBAXW34/5sI+NUB1hmbgyTK/T/IFcEPXpBWLGO+e3pAkAGWLpnH0Zh" + "\r" +"Fae7oAqkMAd3xCNY6ec180tAe57hZ6kS+SYLKwb4gGzYaCxc22vMtYksXHtUeamo" + "\r" +"1NMLzI2ZfUoX" + "\r";/*** 私钥*/private RSAPrivateKey privateKey;/*** 公钥*/private RSAPublicKey publicKey;/*** 字节数据转字符串专用集合*/private static final char[] HEX_CHAR = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};/*** 获取私钥** @return 当前的私钥对象*/public RSAPrivateKey getPrivateKey() {return privateKey;}/*** 获取公钥** @return 当前的公钥对象*/public RSAPublicKey getPublicKey() {return publicKey;}/*** 随机生成密钥对*/public void genKeyPair() {KeyPairGenerator keyPairGen = null;try {keyPairGen = KeyPairGenerator.getInstance("RSA");} catch (NoSuchAlgorithmException e) {e.printStackTrace();}keyPairGen.initialize(1024, new SecureRandom());KeyPair keyPair = keyPairGen.generateKeyPair();this.privateKey = (RSAPrivateKey) keyPair.getPrivate();this.publicKey = (RSAPublicKey) keyPair.getPublic();}/*** 从文件中输入流中加载公钥** @param in 公钥输入流* @throws Exception 加载公钥时产生的异常*/public void loadPublicKey(InputStream in) throws Exception {try {BufferedReader br = new BufferedReader(new InputStreamReader(in));String readLine = null;StringBuilder sb = new StringBuilder();while ((readLine = br.readLine()) != null) {if (readLine.charAt(0) == '-') {continue;} else {sb.append(readLine);sb.append('\r');}}loadPublicKey(sb.toString());} catch (IOException e) {throw new Exception("公钥数据流读取错误");} catch (NullPointerException e) {throw new Exception("公钥输入流为空");}}/*** 从字符串中加载公钥** @param publicKeyStr 公钥数据字符串* @throws Exception 加载公钥时产生的异常*/public void loadPublicKey(String publicKeyStr) throws Exception {try {BASE64Decoder base64Decoder = new BASE64Decoder();byte[] buffer = base64Decoder.decodeBuffer(publicKeyStr);KeyFactory keyFactory = KeyFactory.getInstance("RSA");X509EncodedKeySpec keySpec = new X509EncodedKeySpec(buffer);this.publicKey = (RSAPublicKey) keyFactory.generatePublic(keySpec);} catch (NoSuchAlgorithmException e) {throw new Exception("无此算法");} catch (InvalidKeySpecException e) {throw new Exception("公钥非法");} catch (IOException e) {throw new Exception("公钥数据内容读取错误");} catch (NullPointerException e) {throw new Exception("公钥数据为空");}}/*** 从文件中加载私钥** @return 是否成功* @throws Exception*/public void loadPrivateKey(InputStream in) throws Exception {try {BufferedReader br = new BufferedReader(new InputStreamReader(in));String readLine = null;StringBuilder sb = new StringBuilder();while ((readLine = br.readLine()) != null) {if (readLine.charAt(0) == '-') {continue;} else {sb.append(readLine);sb.append('\r');}}loadPrivateKey(sb.toString());} catch (IOException e) {throw new Exception("私钥数据读取错误");} catch (NullPointerException e) {throw new Exception("私钥输入流为空");}}public void loadPrivateKey(String privateKeyStr) throws Exception {//pkcs8try {BASE64Decoder base64Decoder = new BASE64Decoder();byte[] buffer = base64Decoder.decodeBuffer(privateKeyStr);PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(buffer);KeyFactory keyFactory = KeyFactory.getInstance("RSA");this.privateKey = (RSAPrivateKey) keyFactory.generatePrivate(keySpec);} catch (Exception ex) {//pkcs1try {RSAPrivateKeyStructure asn1PrivKey = new RSAPrivateKeyStructure((ASN1Sequence) ASN1Sequence.fromByteArray(new BASE64Decoder().decodeBuffer(privateKeyStr)));RSAPrivateKeySpec rsaPrivKeySpec = new RSAPrivateKeySpec(asn1PrivKey.getModulus(), asn1PrivKey.getPrivateExponent());KeyFactory keyFactory = KeyFactory.getInstance("RSA");this.privateKey = (RSAPrivateKey) keyFactory.generatePrivate(rsaPrivKeySpec);} catch (NoSuchAlgorithmException e) {throw new Exception("无此算法");} catch (InvalidKeySpecException e) {throw new Exception("私钥非法");} catch (IOException e) {throw new Exception("私钥数据内容读取错误");} catch (NullPointerException e) {throw new Exception("私钥数据为空");}}}/*** 加密过程** @param publicKey 公钥* @param plainTextData 明文数据* @return* @throws Exception 加密过程中的异常信息*/public byte[] encrypt(RSAPublicKey publicKey, byte[] plainTextData) throws Exception {if (publicKey == null) {throw new Exception("加密公钥为空, 请设置");}Cipher cipher = null;try {
// cipher= Cipher.getInstance("RSA", new BouncyCastleProvider());cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", new BouncyCastleProvider());cipher.init(Cipher.ENCRYPT_MODE, publicKey);byte[] output = cipher.doFinal(plainTextData);return output;} catch (NoSuchAlgorithmException e) {throw new Exception("无此加密算法");} catch (NoSuchPaddingException e) {e.printStackTrace();return null;} catch (InvalidKeyException e) {throw new Exception("加密公钥非法,请检查");} catch (IllegalBlockSizeException e) {throw new Exception("明文长度非法");} catch (BadPaddingException e) {throw new Exception("明文数据已损坏");}}/*** 解密过程** @param privateKey 私钥* @param cipherData 密文数据* @return 明文* @throws Exception 解密过程中的异常信息*/public byte[] decrypt(RSAPrivateKey privateKey, byte[] cipherData) throws Exception {if (privateKey == null) {throw new Exception("解密私钥为空, 请设置");}Cipher cipher = null;try {
// cipher= Cipher.getInstance("RSA", new BouncyCastleProvider());cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", new BouncyCastleProvider());cipher.init(Cipher.DECRYPT_MODE, privateKey);byte[] output = cipher.doFinal(cipherData);return output;} catch (NoSuchAlgorithmException e) {throw new Exception("无此解密算法");} catch (NoSuchPaddingException e) {e.printStackTrace();return null;} catch (InvalidKeyException e) {throw new Exception("解密私钥非法,请检查");} catch (IllegalBlockSizeException e) {throw new Exception("密文长度非法");} catch (BadPaddingException e) {throw new Exception("密文数据已损坏");}}/*** 字节数据转十六进制字符串** @param data 输入数据* @return 十六进制内容*/public static String byteArrayToString(byte[] data) {StringBuilder stringBuilder = new StringBuilder();for (int i = 0; i < data.length; i++) {//取出字节的高四位 作为索引得到相应的十六进制标识符 注意无符号右移 stringBuilder.append(HEX_CHAR[(data[i] & 0xf0) >>> 4]);//取出字节的低四位 作为索引得到相应的十六进制标识符 stringBuilder.append(HEX_CHAR[(data[i] & 0x0f)]);if (i < data.length - 1) {stringBuilder.append(' ');}}return stringBuilder.toString();}public static void main(String[] args) {RSAEncrypt rsaEncrypt = new RSAEncrypt();//rsaEncrypt.genKeyPair(); //加载公钥 try {rsaEncrypt.loadPublicKey(new FileInputStream(new File("rsa/rsa_public_key.pem")));System.out.println("加载公钥成功");} catch (Exception e) {System.err.println(e.getMessage());System.err.println("加载公钥失败");System.exit(0);}//加载私钥 try {
// rsaEncrypt.loadPrivateKey(new FileInputStream(new File("rsa/private_key.pem")));rsaEncrypt.loadPrivateKey(new FileInputStream("rsa/pkcs8_private_key.pem"));System.out.println("加载私钥成功");} catch (Exception e) {e.printStackTrace();System.err.println("加载私钥失败");System.exit(0);}//测试字符串 String encryptStr = "aabbcc123我的";try {//加密 byte[] cipher = rsaEncrypt.encrypt(rsaEncrypt.getPublicKey(), encryptStr.getBytes());System.out.println(new BASE64Encoder().encode(cipher));cipher = (new BASE64Decoder().decodeBuffer("OiQjf0zW+1eMRZ4L5MK32dcNuK6Xjb1Lm5QMgFVliz3Ak5pLiPY0hCwwLLaoGQ68p/1N8vMqdcl3xPwoZ7W8jSCYj3qadRyF7r4TGsOokAaCush+IPcuoEAkAClz5KcjWixg8feLC4GdXZEmrp7pXHsqr3MjYxg1YW1vPXuXxIg="));//解密 byte[] plainText = rsaEncrypt.decrypt(rsaEncrypt.getPrivateKey(), cipher);System.out.println("密文长度:" + cipher.length);System.out.println(RSAEncrypt.byteArrayToString(cipher));System.out.println("明文长度:" + plainText.length);System.out.println(RSAEncrypt.byteArrayToString(plainText));System.out.println(new String(plainText));} catch (Exception e) {System.err.println(e.getMessage());}}
}RSA数据加密解密（各种语言）相关推荐
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