Question

我一直在为aes（cbc）测试示例linux加密api代码，它为pc提供了正确的结果，为arm board（cortex-15）提供了错误的结果，有人可以提出原因。正确的输出为“ e353779c1079aeb82708942dbe77181a”，但手臂处理器给出的输出为“ a84ff1b6b04ff1b6904ff1b600000000”。对于任何给定的输入，只有1-2位在变化。我的ARM处理器是32位处理器，而代码在64位PC上进行了测试。这是示例代码：

{

    #include <stdio.h>

    #include <unistd.h>

    #include <sys/socket.h>

    #include <linux/if_alg.h>

    #include <linux/socket.h>

    #include <string.h>

    #ifndef SOL_ALG

    #define SOL_ALG 279

    #endif

int main(void){

    int opfd;

    int tfmfd;

    struct sockaddr_alg sa = {

        .salg_family = AF_ALG,

        .salg_type = "skcipher",

        .salg_name = "cbc(aes)"

    };

    struct msghdr msg = {};

    struct cmsghdr *cmsg;

    char cbuf[CMSG_SPACE(4) + CMSG_SPACE(20)] = {0};

    char buf[16];

    struct af_alg_iv *iv;

    struct iovec iov;


    int i;

    tfmfd = socket(AF_ALG, SOCK_SEQPACKET, 0);

    bind(tfmfd, (struct sockaddr *)&sa, sizeof(sa));

    setsockopt(tfmfd, SOL_ALG, ALG_SET_KEY,

    "\x06\xa9\x21\x40\x36\xb8\xa1\x5b"

    "\x51\x2e\x03\xd5\x34\x12\x00\x06", 16);

    opfd = accept(tfmfd, NULL, 0);

    msg.msg_control = cbuf;

    msg.msg_controllen = sizeof(cbuf);

    cmsg = CMSG_FIRSTHDR(&msg);

    cmsg->cmsg_level = SOL_ALG;

    cmsg->cmsg_type = ALG_SET_OP;

    cmsg->cmsg_len = CMSG_LEN(4);

    *(__u32 *)CMSG_DATA(cmsg) = ALG_OP_ENCRYPT;

    cmsg = CMSG_NXTHDR(&msg, cmsg);

    cmsg->cmsg_level = SOL_ALG;

    cmsg->cmsg_type = ALG_SET_IV;

    cmsg->cmsg_len = CMSG_LEN(20);

    iv = (void *)CMSG_DATA(cmsg);

    iv->ivlen = 16;

    memcpy(iv->iv, "\x3d\xaf\xba\x42\x9d\x9e\xb4\x30
       "\xb4\x22\xda\x80\x2c\x9f\xac\x41", 16);


    iov.iov_base = "Single block msg";

    iov.iov_len =16;

    msg.msg_iov = &iov;

    msg.msg_iovlen = 1;

    sendmsg(opfd, &msg, 0);

    read(opfd, buf, 16);

    for (i = 0; i < 16; i++) {

        printf("%02x", (unsigned char)buf[i]);
    }

    printf("\n");

    close(opfd);

    close(tfmfd);

    return 0;
}
}

Linux加密API在主板和PC上给出不同的结果

0 个答案: