iPhone 是否支持硬件加速的 AES 加密? [英] Does iPhone support hardware-accelerated AES Encryption?

问题描述

我可以在 iPhone/iPad 上找到对硬件加速 AES 加密"的引用.但是我可以找到执行 AES 加密的 API (CCCrypt) 根本不谈硬件加速.

I could find references to "hardware-accelerated AES encryption" on an iPhone/iPad. But the APIs that I could find to do the AES encryption (CCCrypt) don't talk about hardware-acceleration at all.

有谁知道这些 API 是硬件加速的 API 还是其他 API?

Does anyone have any idea if these APIs are the ones that are hardware-accelerated or are there other ones?

推荐答案

是的.

从 4.3 开始，如果消息具有 >64 个块(即 1024 字节)，则 AES 的 CCCrypt 函数将使用硬件加速实现.(这是通过 ioctl 与 /dev/aes_0 一起完成的，顺便说一句.)

As of 4.3, if the message has >64 blocks (i.e. 1024 bytes), the CCCrypt function for AES will use the hardware-accelerated implementation. (This is done by ioctling with /dev/aes_0, BTW.)

除了 AES，当输入大于 4096 字节时，SHA-1 也是硬件加速的.

Besides AES, SHA-1 is also hardware-accelerated when the input is > 4096 bytes.

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