IOS 密碼加密 SHA256+GTMBase64

在項目中，Android系統先完成開發，所以IOS系統就參照Android的完成。在密碼加密環節，就必須要保持一致了。
Android代碼

public class Crypto {
    /**
     * Define a hash type enumeration for strong-typing
     */
    public enum HashType {
        MD5("MD5"), SHA1("SHA-1"), SHA256("SHA-256"), SHA512("SHA-512");
        private String algorithm;

        HashType(String algorithm) {
            this.algorithm = algorithm;
        }

        @Override
        public String toString() {
            return this.algorithm;
        }
    }

    /**
     * Set-up MD5 as the default hashing algorithm
     */
    private static final HashType DEFAULT_HASH_TYPE = HashType.SHA256;

    /**
     * Create a password hash using the default hashing algorithm
     * 
     * @param input
     *            The password
     * @return The password hash
     */
    public static String passwordHash(String input) {
        return passwordHash(input, DEFAULT_HASH_TYPE);
    }

    public static String passwordHash(String input, HashType hashType) {
        try {
            MessageDigest m = MessageDigest.getInstance(hashType.toString());
            byte[] out = m.digest(input.getBytes());
            return new String(Base64.encodeBase64(out));
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }
}

IOS方法

+ (NSString*) sha256:(NSString *)stringpass
{
    const char *cstr = [stringpass UTF8String];
    NSData *data = [NSData dataWithBytes:cstr length:stringpass.length];

    uint8_t digest[CC_SHA256_DIGEST_LENGTH];

    CC_SHA256(data.bytes,data.length, digest);

    NSData *da=[[NSData alloc]initWithBytes:digest length:CC_SHA256_DIGEST_LENGTH];

    NSData *str=[GTMBase64 encodeData:da];
    NSString *output=[[NSString alloc]initWithData:str  encoding:NSUTF8StringEncoding];
    return output;
}