BOOL
AnscX509CertIsSelfSigned
(
void* raw_cert_data,
ULONG raw_cert_size
)
{
PANSC_ASN1_CERTIFICATE pAsnCert = NULL;
BOOL bIsSelfSigned = FALSE;
/* decode the asn.1 certificate handle */
pAsnCert = (PANSC_ASN1_CERTIFICATE)
anscGetCertHandle
(
raw_cert_data,
raw_cert_size
);
if( pAsnCert == NULL)
{
goto EXIT;
}
bIsSelfSigned = pAsnCert->IsSelfSigned(pAsnCert);
EXIT:
anscFreeCertHandle((ANSC_HANDLE)pAsnCert);
return bIsSelfSigned;
}
/*********************************************************************************
*
* Utility functions
*
*********************************************************************************/
ANSC_X509_CERTIFICATE*
AnscX509CertGetCertWrap
(
void* raw_cert_data,
ULONG raw_cert_size
)
{
ANSC_X509_CERTIFICATE* pX509Cert = NULL;
PANSC_ASN1_CERTIFICATE pAsnCert = NULL;
ULONG keyUsage = 0;
ANSC_CRYPTO_HASH hash;
/* decode the asn.1 certificate handle */
pAsnCert = (PANSC_ASN1_CERTIFICATE)
anscGetCertHandle
(
raw_cert_data,
raw_cert_size
);
if( pAsnCert == NULL)
{
goto EXIT;
}
/* create the X509 Certificate */
pX509Cert = (PANSC_X509_CERTIFICATE)AnscAllocateMemory(sizeof(ANSC_X509_CERTIFICATE));
if( pX509Cert == NULL)
{
goto EXIT;
}
/* init the pX509Cert */
pX509Cert->CertSize = raw_cert_size;
pX509Cert->CertData = (PVOID)AnscAllocateMemory(raw_cert_size);
if( pX509Cert->CertData != NULL)
{
AnscCopyMemory( pX509Cert->CertData, raw_cert_data, raw_cert_size);
}
pX509Cert->bSelfSigned = pAsnCert->IsSelfSigned(pAsnCert);
if( pAsnCert->GetKeyType(pAsnCert) == PKI_RSA_KEY)
{
pX509Cert->Signing = ANSC_CERT_signing_rsa;
pX509Cert->KeyType = ANSC_CERT_keyType_rsa;
}
else if( pAsnCert->GetKeyType(pAsnCert) == PKI_DSA_KEY)
{
pX509Cert->Signing = ANSC_CERT_signing_dsa;
pX509Cert->KeyType = ANSC_CERT_keyType_dsa;
}
else
{
pX509Cert->KeyType = ANSC_CERT_keyType_diffieHellman;
}
/* get the key length */
pX509Cert->KeyBits = pAsnCert->GetKeyBits(pAsnCert);
/* get the key usage; */
if( ANSC_STATUS_SUCCESS == pAsnCert->GetKeyUsage(pAsnCert, &keyUsage))
{
/* the value has to be reversed */
pX509Cert->KeyUsage = 0;
if( keyUsage >= 0x0100)
{
pX509Cert->KeyUsage += ANSC_CERT_keyUsage_deciperOnly;
}
keyUsage = keyUsage & 0x000000FF;
if( keyUsage & 0x00000001)
{
pX509Cert->KeyUsage += 0x000000080;
}
if( keyUsage & 0x00000002)
{
pX509Cert->KeyUsage += 0x000000040;
}
if( keyUsage & 0x00000004)
{
pX509Cert->KeyUsage += 0x000000020;
}
if( keyUsage & 0x00000008)
{
pX509Cert->KeyUsage += 0x000000010;
}
if( keyUsage & 0x00000010)
{
pX509Cert->KeyUsage += 0x000000008;
}
if( keyUsage & 0x00000020)
{
pX509Cert->KeyUsage += 0x000000004;
}
if( keyUsage & 0x00000040)
{
pX509Cert->KeyUsage += 0x000000002;
}
if( keyUsage & 0x00000080)
{
pX509Cert->KeyUsage += 0x000000001;
}
}
else
{
/*
* For the old cert without KeyUsage extension, we assume it
* has all the usages
*/
pX509Cert->KeyUsage = 0x000000FF;
}
/* get the md5 hash of the raw stream and set it as the CertID */
hash.Length = ANSC_MD5_OUTPUT_SIZE;
hash.Length = AnscCryptoMd5Digest(raw_cert_data, raw_cert_size, &hash);
AnscCopyMemory
(
pX509Cert->CertID,
hash.Value,
hash.Length
);
#if 1
if( pAsnCert->IsSelfSigned(pAsnCert))
{
if(!pAsnCert->VerifySignature(pAsnCert, NULL))
{
AnscTrace("Warning: Failed to verify the self-signed certificate.\n");
}
}
#endif
EXIT:
anscFreeCertHandle((ANSC_HANDLE)pAsnCert);
return pX509Cert;
}
