当我使用一个有bug /崩溃的Cordova iOS版本时，这个错误有时会出现在日志中。当我升级或降级cordova iOS时，它就消失了。

我所连接的服务器使用的是TLSv1.2 SSL，所以我知道这不是问题。

当我使用一个有bug /崩溃的Cordova iOS版本时，这个错误有时会出现在日志中。当我升级或降级cordova iOS时，它就消失了。

我所连接的服务器使用的是TLSv1.2 SSL，所以我知道这不是问题。

iOS 9和OSX 10.11要求所有你计划请求数据的主机使用TLSv1.2 SSL，除非你在应用程序的信息中指定了例外域。plist文件。

Info的语法。Plist配置如下所示:

<key>NSAppTransportSecurity</key>
<dict>
  <key>NSExceptionDomains</key>
  <dict>
    <key>yourserver.com</key>
    <dict>
      <!--Include to allow subdomains-->
      <key>NSIncludesSubdomains</key>
      <true/>
      <!--Include to allow insecure HTTP requests-->
      <key>NSExceptionAllowsInsecureHTTPLoads</key>
      <true/>
      <!--Include to specify minimum TLS version-->
      <key>NSExceptionMinimumTLSVersion</key>
      <string>TLSv1.1</string>
    </dict>
  </dict>
</dict>

如果你的应用程序(例如第三方web浏览器)需要连接到任意主机，你可以这样配置:

<key>NSAppTransportSecurity</key>
<dict>
    <!--Connect to anything (this is probably BAD)-->
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

如果您不得不这样做，最好更新您的服务器以使用TLSv1.2和SSL，如果它们还没有这样做的话。这应该被认为是一个临时的解决办法。

到今天为止，预发布文档没有以任何特定的方式提到任何这些配置选项。一旦完成，我将更新答案以链接到相关文档。

如果你的后端使用安全连接，你可以使用NSURLSession

CFNetwork SSLHandshake failed (-9801)
NSURLSession/NSURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9801)

您需要检查您的服务器配置，特别是获得ATS版本和SSL证书

而不是仅仅通过设置NSExceptionAllowsInsecureHTTPLoads = YES来允许不安全的连接，相反，你需要允许降低安全性，如果你的服务器不满足ATS的最低要求(v1.2)(或者更好地修复服务器端)。

允许降低安全性到单个服务器

<key>NSExceptionDomains</key>
<dict>
    <key>api.yourDomaine.com</key>
    <dict>
        <key>NSExceptionMinimumTLSVersion</key>
        <string>TLSv1.0</string>
        <key>NSExceptionRequiresForwardSecrecy</key>
        <false/>
    </dict>
</dict>

使用openssl客户端调查证书，并使用openssl客户端获取服务器配置:

openssl s_client  -connect api.yourDomaine.com:port //(you may need to specify port or  to try with https://... or www.)

．．在结尾找到

SSL-Session:
    Protocol  : TLSv1
    Cipher    : AES256-SHA
    Session-ID: //
    Session-ID-ctx: 
    Master-Key: //
    Key-Arg   : None
    Start Time: 1449693038
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)

应用程序传输安全(ATS)要求传输层安全(TLS)协议版本1.2。

ATS连接要求:

The requirements for a web service connection to use App Transport Security (ATS) involve the server, connection ciphers, and certificates, as follows: Certificates must be signed with one of the following types of keys: Secure Hash Algorithm 2 (SHA-2) key with a digest length of at least 256 (that is, SHA-256 or greater) Elliptic-Curve Cryptography (ECC) key with a size of at least 256 bits Rivest-Shamir-Adleman (RSA) key with a length of at least 2048 bits An invalid certificate results in a hard failure and no connection. The following connection ciphers support forward secrecy (FS) and work with ATS: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA

更新:原来openssl只提供最小协议版本协议:TLSv1链接

在项目的.plist文件中添加以下权限:

<key>NSAppTransportSecurity</key>
<dict>
    <!--Connect to anything (this is probably BAD)-->
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

另一个有用的工具是nmap (brew install nmap)

nmap --script ssl-enum-ciphers -p 443 google.com

给出了输出

Starting Nmap 7.12 ( https://nmap.org ) at 2016-08-11 17:25 IDT
Nmap scan report for google.com (172.217.23.46)
Host is up (0.061s latency).
Other addresses for google.com (not scanned): 2a00:1450:4009:80a::200e
PORT    STATE SERVICE
443/tcp open  https
| ssl-enum-ciphers: 
|   TLSv1.0: 
|     ciphers: 
|       TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (secp256r1) - A
|       TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (secp256r1) - A
|       TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (secp256r1) - A
|       TLS_RSA_WITH_AES_128_CBC_SHA (rsa 2048) - A
|       TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 2048) - C
|       TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (secp256r1) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA (rsa 2048) - A
|     compressors: 
|       NULL
|     cipher preference: server
|   TLSv1.1: 
|     ciphers: 
|       TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (secp256r1) - A
|       TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (secp256r1) - A
|       TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (secp256r1) - A
|       TLS_RSA_WITH_AES_128_CBC_SHA (rsa 2048) - A
|       TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 2048) - C
|       TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (secp256r1) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA (rsa 2048) - A
|     compressors: 
|       NULL
|     cipher preference: server
|   TLSv1.2: 
|     ciphers: 
|       TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (secp256r1) - A
|       TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 (secp256r1) - A
|       TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (secp256r1) - A
|       TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (secp256r1) - A
|       TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 (secp256r1) - A
|       TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (secp256r1) - A
|       TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 (secp256r1) - A
|       TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (secp256r1) - A
|       TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (secp256r1) - A
|       TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (secp256r1) - A
|       TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (secp256r1) - A
|       TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (secp256r1) - A
|       TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (secp256r1) - A
|       TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (secp256r1) - A
|       TLS_RSA_WITH_3DES_EDE_CBC_SHA (rsa 2048) - C
|       TLS_RSA_WITH_AES_128_CBC_SHA (rsa 2048) - A
|       TLS_RSA_WITH_AES_128_CBC_SHA256 (rsa 2048) - A
|       TLS_RSA_WITH_AES_128_GCM_SHA256 (rsa 2048) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA (rsa 2048) - A
|       TLS_RSA_WITH_AES_256_CBC_SHA256 (rsa 2048) - A
|       TLS_RSA_WITH_AES_256_GCM_SHA384 (rsa 2048) - A
|     compressors: 
|       NULL
|     cipher preference: client
|_  least strength: C

Nmap done: 1 IP address (1 host up) scanned in 5.48 seconds