java 使用Cipher默认加密，ios aes AES/ECB/PKCS5Padding 解密,

java加解密（java默认不支持PKCS7Padding）：

public class test {
    // 加密
    public static String Encrypt(String sSrc, String sKey) throws Exception {
        if (sKey == null) {
            System.out.print("Key为空null");
            return null;
        }
        // 判断Key是否为16位
        if (sKey.length() != 16) {
            System.out.print("Key长度不是16位");
            return null;
        }
        byte[] raw = sKey.getBytes("utf-8");
        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
      //"算法/模式/补码方式"、Cipher cipher = Cipher.getInstance("AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));

        char[] result= new Base64().encode(encrypted);
        return new String(result);
        
      
    }

    // 解密
    public static String Decrypt(String sSrc, String sKey) throws Exception {
        try {
            // 判断Key是否正确
            if (sKey == null) {
                System.out.print("Key为空null");
                return null;
            }
            // 判断Key是否为16位
            if (sKey.length() != 16) {
                System.out.print("Key长度不是16位");
                return null;
            }
            byte[] raw = sKey.getBytes("utf-8");
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, skeySpec);
            byte[] encrypted1 = new Base64().decode(sSrc.toCharArray());
            try {
                byte[] original = cipher.doFinal(encrypted1);
                String originalString = new String(original,"utf-8");
                return originalString;
            } catch (Exception e) {
                System.out.println(e.toString());
                return null;
            }
        } catch (Exception ex) {
            System.out.println(ex.toString());
            return null;
        }
    }
    public static void main(String[] args) throws Exception {
        /*
         * 此处使用AES-128-ECB加密模式，key需要为16位。
         */
        String cKey = "1234567890123456";
        // 需要加密的字串
        String cSrc = "有钱";
        System.out.println(cSrc);
        // 加密
        String enString = Encrypt(cSrc, cKey);
        System.out.println("加密后的字串是：" + enString);
        // 解密
        String DeString = Decrypt("xOgvmYILb7wr6Rov9h0vwOh3jNukN5Gnjcfvx91tm1gRe0KBZEDyzuNH9fX2rduvrSMO0b3Qb9yXyk/iSA5gaOFqSrytIHZqwxCaYinM6FGnOZtwpWqoPGOxGRS8sgwUphok9xALvByiUXel663TS+ogIv7lQrujhGqaGu0S8QeBEpNlxKj3jpjB975J2smp9j+9DUUfisj2tk5tlf63G9QdJphb6r8sJXBkf7kRFjw=", cKey);
        System.out.println("解密后的字串是：" + DeString);
    }
}

ios AES/ECB/PKCS5Padding 加解密：

-(NSString *)AES128Encrypt:(NSString *)plainText key:(NSString *)key
{
    char keyPtr[kCCKeySizeAES128+1];
    memset(keyPtr, 0, sizeof(keyPtr));
    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
    
    NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding];
    NSUInteger dataLength = [data length];
    
    size_t bufferSize = dataLength + kCCBlockSizeAES128;
    unsigned char *buffer = malloc(bufferSize);
    size_t numBytesEncrypted = 0;
    CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,
                                          kCCAlgorithmAES128,
                                          kCCOptionPKCS7Padding|kCCOptionECBMode,
                                          keyPtr,
                                          kCCBlockSizeAES128,
                                          NULL,
                                          [data bytes],
                                          dataLength,
                                          buffer,
                                          bufferSize,
                                          &numBytesEncrypted);
    if (cryptStatus == kCCSuccess) {
        NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
        return [NSString base64StringFromData:resultData length:[resultData length]];
        
    }
    free(buffer);
    return @"";
}
-(NSString *)AES128Decrypt:(NSString *)encryptText key:(NSString *)key
{
    char keyPtr[kCCKeySizeAES128 + 1];
    memset(keyPtr, 0, sizeof(keyPtr));
    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
    
    //NSData *data = [GTMBase64 decodeData:[encryptText dataUsingEncoding:NSUTF8StringEncoding]];
    
    NSData *data=[NSData base64DataFromString:encryptText];
    
    NSUInteger dataLength = [data length];
    size_t bufferSize = dataLength + kCCBlockSizeAES128;
    unsigned char *buffer = malloc(bufferSize);
    
    size_t numBytesCrypted = 0;
    CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,
                                          kCCAlgorithmAES128,
                                          kCCOptionPKCS7Padding|kCCOptionECBMode,
                                          keyPtr,
                                          kCCBlockSizeAES128,
                                          NULL,
                                          [data bytes],
                                          dataLength,
                                          buffer,
                                          bufferSize,
                                          &numBytesCrypted);
    if (cryptStatus == kCCSuccess) {
        NSData *resultData = [NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];
        return [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding];
    }
    free(buffer);
    return @"";
}

方法：base64DataFromString

#import "NSData+Base64.h"

@implementation NSData (Base64Additions)

+ (NSData *)base64DataFromString:(NSString *)string {
  unsigned long ixtext, lentext;
  unsigned char ch, inbuf[4], outbuf[3];
  short i, ixinbuf;
  Boolean flignore, flendtext = false;
  const unsigned char *tempcstring;
  NSMutableData *theData;
  
  if (string == nil) {
    return [NSData data];
  }
  
  ixtext = 0;
  
  tempcstring = (const unsigned char *)[string UTF8String];
  
  lentext = [string length];
  
  theData = [NSMutableData dataWithCapacity: lentext];
  
  ixinbuf = 0;
  
  while (true) {
    if (ixtext >= lentext) {
      break;
    }
    
    ch = tempcstring [ixtext++];
    
    flignore = false;
    
    if ((ch >= 'A') && (ch <= 'Z')) {
      ch = ch - 'A';
    }
    else if ((ch >= 'a') && (ch <= 'z')) {
      ch = ch - 'a' + 26;
    }
    else if ((ch >= '0') && (ch <= '9')) {
      ch = ch - '0' + 52;
    }
    else if (ch == '+') {
      ch = 62;
    }
    else if (ch == '=') {
      flendtext = true;
    }
    else if (ch == '/') {
      ch = 63;
    }
    else {
      flignore = true; 
    }
    
    if (!flignore) {
      short ctcharsinbuf = 3;
      Boolean flbreak = false;
      
      if (flendtext) {
        if (ixinbuf == 0) {
          break;
        }
        
        if ((ixinbuf == 1) || (ixinbuf == 2)) {
          ctcharsinbuf = 1;
        }
        else {
          ctcharsinbuf = 2;
        }
        
        ixinbuf = 3;
        
        flbreak = true;
      }
      
      inbuf [ixinbuf++] = ch;
      
      if (ixinbuf == 4) {
        ixinbuf = 0;
        
        outbuf[0] = (inbuf[0] << 2) | ((inbuf[1] & 0x30) >> 4);
        outbuf[1] = ((inbuf[1] & 0x0F) << 4) | ((inbuf[2] & 0x3C) >> 2);
        outbuf[2] = ((inbuf[2] & 0x03) << 6) | (inbuf[3] & 0x3F);
        
        for (i = 0; i < ctcharsinbuf; i++) {
          [theData appendBytes: &outbuf[i] length: 1];
        }
      }
      
      if (flbreak) {
        break;
      }
    }
  }
  
  return theData;
}

@end

方法：base64StringFromData

#import "NSString+Base64.h"
#import 
static char base64EncodingTable[64] = {
  'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
  'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
  'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
  'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
};

@implementation NSString (Base64Additions)

+ (NSString *)base64StringFromData: (NSData *)data length: (NSUInteger)length {
  unsigned long ixtext, lentext;
  long ctremaining;
  unsigned char input[3], output[4];
  short i, charsonline = 0, ctcopy;
  const unsigned char *raw;
  NSMutableString *result;
  
  lentext = [data length]; 
  if (lentext < 1) {
    return @"";
  }
  result = [NSMutableString stringWithCapacity: lentext];
  raw = [data bytes];
  ixtext = 0; 
  
  while (true) {
    ctremaining = lentext - ixtext;
    if (ctremaining <= 0) {
      break;
    }
    for (i = 0; i < 3; i++) { 
      unsigned long ix = ixtext + i;
      if (ix < lentext) {
        input[i] = raw[ix];
      }
      else {
        input[i] = 0;
      }
    }
    output[0] = (input[0] & 0xFC) >> 2;
    output[1] = ((input[0] & 0x03) << 4) | ((input[1] & 0xF0) >> 4);
    output[2] = ((input[1] & 0x0F) << 2) | ((input[2] & 0xC0) >> 6);
    output[3] = input[2] & 0x3F;
    ctcopy = 4;
    switch (ctremaining) {
      case 1: 
        ctcopy = 2; 
        break;
      case 2: 
        ctcopy = 3; 
        break;
    }
    
    for (i = 0; i < ctcopy; i++) {
      [result appendString: [NSString stringWithFormat: @"%c", base64EncodingTable[output[i]]]];
    }
    
    for (i = ctcopy; i < 4; i++) {
      [result appendString: @"="];
    }
    
    ixtext += 3;
    charsonline += 4;
    
    if ((length > 0) && (charsonline >= length)) {
      charsonline = 0;
    }
  }     
  return result;
}

@end