2013-05-10 93 views
1

嗨,我有两个证书,即mycert.crt和root.crt。我需要确定我的证书是否由根证书签名。 我使用下面的代码这样做使用下面的代码,但我得到一个错误 分割故障(核心转储)阅读和验证证书

static int verifyCerti (BYTE *cert1, BYTE *cert2, int certlenght1, int certlenght2); 

int main (int ac, char **av) 
{ 
    FILE  *f_in, *f_in2; 
    BYTE  *certBuf, *certBuf2; 
    UINT32 certBufLen,certBufLen2; 
    UINT32 certLen,certLen2; 
    int  result; 


    //////////// Reading first certificate///// 

    certBufLen = 0; 
    certBuf = malloc (1); 
    //for (i=0; i<nCerts; i++) { 
    if ((f_in = fopen (av[1], "rb")) == NULL) { 
     fprintf (stderr, "Unable to open file %s for input\n", av[1]); 
     exit (1); 
    } 
    fseek (f_in, 0, SEEK_END); 
    certLen = ftell (f_in); 
    fseek (f_in, 0, SEEK_SET); 
    certBuf = realloc (certBuf, certBufLen + certLen); 

    if (fread (certBuf+certBufLen, 1, certLen, f_in) != certLen) { 
     fprintf (stderr, "Failed to read file %s\n", av[1]); 
     exit (1); 
    } 
    if (certBuf[certBufLen] != 0x30) { 
     fprintf (stderr, "Certificate file %s not in binary format\n", av[1]); 
     exit (1); 
    } 
    fclose (f_in); 
    printf ("we reach here %s \n", av[1]); 


    ////////////////Reading second certificate///////////////////////////////////////////////// 


    certBufLen2 = 0; 
    certBuf2 = malloc (1); 
    if ((f_in2 = fopen (av[2], "rb")) == NULL) { 
     fprintf (stderr, "Unable to open file %s for input\n", av[2]); 
     exit (1); 
    } 
    fseek (f_in2, 0, SEEK_END); 
    certLen2 = ftell (f_in2); 
    fseek (f_in2, 0, SEEK_SET); 
    certBuf2 = realloc (certBuf2, certBufLen2 + certLen2); 

    if (fread (certBuf2+certBufLen2, 1, certLen2, f_in2) != certLen2) { 
     fprintf (stderr, "Failed to read file %s\n", av[2]); 
     exit (1); 
    } 
    if (certBuf2[certBufLen2] != 0x30) { 
     fprintf (stderr, "Certificate file %s not in binary format\n", av[2]); 
     exit (1); 
    } 
    fclose (f_in2); 

    printf ("we reach here %s \n", av[2]); 

    if (verifyCerti (certBuf, certBuf2, certBufLen, certBufLen2) < 0) { 
     fprintf (stderr, "Certificate chain is incorrect\n"); 
     exit (1); 
    } 
} 

static int verifyCerti (BYTE *cert1, BYTE *cert2, int certLen1, int certLen2) 
{ 

    X509 *root; 
    X509 *mycert; 

    root = d2i_X509 (NULL, (unsigned char const **)&cert2, certLen2); 
    mycert = d2i_X509 (NULL, (unsigned char const **)&cert1, certLen1); 

    //Get root certificate into root 
    //Get mycert into mycert. 

    //Get the public key. 

    EVP_PKEY *pubkey = X509_get_pubkey(root); 


    //verify. result less than or 0 means not verified or some error. 

    int result = X509_verify(mycert, pubkey); 

    //free the public key. 

    EVP_PKEY_free(pubkey); 

    return result;  
} 

的错误是我想是因为X509_verify(),但我不确定。

+0

你打扰在调试器下运行这个吗?有什么特别的原因,你没有使用'X509 * d2i_X509_fp(FILE * fp,X509 ** x)'为您的文件加载? – WhozCraig 2013-05-10 14:59:58

+0

您在传递给X509_verify之前是否检查过root和mycert的值?他们应该是有效的证书。 – doptimusprime 2013-05-11 05:27:29

+0

对于d2i函数,证书的格式应该是DER。查看证书文件的格式是否为DER。如果不是这样,则将其转换为DER。 – doptimusprime 2013-05-18 19:21:11

回答

2

功能的目的是为了验证是否PKEY(公钥)验证与serverCert与相应的私钥签名..

你实际上应该通过什么作为第二个参数是公钥,其相应的私钥已经签署了在parameter1中传递的证书。我认为你没有通过正确的公钥。

尝试获取失败使用的错误代码。

unsigned int errCode = ERR_get_error(); 

printf("\nError: %s\n", ERR_error_string(errCode, NULL)); 
printf("\nLib: %s\n", ERR_lib_error_string(errCode)); 
printf("\nFunc: %s\n", ERR_func_error_string(errCode)); 
printf("\nReason: %s\n", ERR_reason_error_string(errCode)); 
+0

是的,没错。 X509_verify()用于验证证书自身的一致性。即证书数据上的签名是否与证书自己的公钥相符。 OP要验证需要其他功能的证书链。 – jcoffland 2013-12-09 10:14:24