static int snmp_translate(struct nf_conn *ct, int dir, struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
struct udphdr *udph = (struct udphdr *)((__be32 *)iph + iph->ihl);
u16 datalen = ntohs(udph->len) - sizeof(struct udphdr);
char *data = (unsigned char *)udph + sizeof(struct udphdr);
struct snmp_ctx ctx;
int ret;
if (dir == IP_CT_DIR_ORIGINAL) {
ctx.from = ct->tuplehash[dir].tuple.src.u3.ip;
ctx.to = ct->tuplehash[!dir].tuple.dst.u3.ip;
} else {
ctx.from = ct->tuplehash[!dir].tuple.src.u3.ip;
ctx.to = ct->tuplehash[dir].tuple.dst.u3.ip;
}
if (ctx.from == ctx.to)
return NF_ACCEPT;
ctx.begin = (unsigned char *)udph + sizeof(struct udphdr);
ctx.check = &udph->check;
ret = asn1_ber_decoder(&nf_nat_snmp_basic_decoder, &ctx, data, datalen);
if (ret < 0) {
nf_ct_helper_log(skb, ct, "parser failed\n");
return NF_DROP;
}
return NF_ACCEPT;
}
/**
* pkcs7_parse_message - Parse a PKCS#7 message
* @data: The raw binary ASN.1 encoded message to be parsed
* @datalen: The size of the encoded message
*/
struct pkcs7_message *pkcs7_parse_message(const void *data, size_t datalen)
{
struct pkcs7_parse_context *ctx;
struct pkcs7_message *msg = ERR_PTR(-ENOMEM);
int ret;
ctx = kzalloc(sizeof(struct pkcs7_parse_context), GFP_KERNEL);
if (!ctx)
goto out_no_ctx;
ctx->msg = kzalloc(sizeof(struct pkcs7_message), GFP_KERNEL);
if (!ctx->msg)
goto out_no_msg;
ctx->sinfo = kzalloc(sizeof(struct pkcs7_signed_info), GFP_KERNEL);
if (!ctx->sinfo)
goto out_no_sinfo;
ctx->sinfo->sig = kzalloc(sizeof(struct public_key_signature),
GFP_KERNEL);
if (!ctx->sinfo->sig)
goto out_no_sig;
ctx->data = (unsigned long)data;
ctx->ppcerts = &ctx->certs;
ctx->ppsinfo = &ctx->msg->signed_infos;
/* Attempt to decode the signature */
ret = asn1_ber_decoder(&pkcs7_decoder, ctx, data, datalen);
if (ret < 0) {
msg = ERR_PTR(ret);
goto out;
}
ret = pkcs7_check_authattrs(ctx->msg);
if (ret < 0) {
msg = ERR_PTR(ret);
goto out;
}
msg = ctx->msg;
ctx->msg = NULL;
out:
while (ctx->certs) {
struct x509_certificate *cert = ctx->certs;
ctx->certs = cert->next;
x509_free_certificate(cert);
}
out_no_sig:
pkcs7_free_signed_info(ctx->sinfo);
out_no_sinfo:
pkcs7_free_message(ctx->msg);
out_no_msg:
kfree(ctx);
out_no_ctx:
return msg;
}
/*
* Parse an X.509 certificate
*/
struct x509_certificate *x509_cert_parse(const void *data, size_t datalen)
{
struct x509_certificate *cert;
struct x509_parse_context *ctx;
long ret;
ret = -ENOMEM;
cert = kzalloc(sizeof(struct x509_certificate), GFP_KERNEL);
if (!cert)
goto error_no_cert;
cert->pub = kzalloc(sizeof(struct public_key), GFP_KERNEL);
if (!cert->pub)
goto error_no_ctx;
ctx = kzalloc(sizeof(struct x509_parse_context), GFP_KERNEL);
if (!ctx)
goto error_no_ctx;
ctx->cert = cert;
ctx->data = (unsigned long)data;
/* Attempt to decode the certificate */
ret = asn1_ber_decoder(&x509_decoder, ctx, data, datalen);
if (ret < 0)
goto error_decode;
/* Decode the public key */
ret = asn1_ber_decoder(&x509_rsakey_decoder, ctx,
ctx->key, ctx->key_size);
if (ret < 0)
goto error_decode;
kfree(ctx);
return cert;
error_decode:
kfree(ctx);
error_no_ctx:
x509_free_certificate(cert);
error_no_cert:
return ERR_PTR(ret);
}
/*
* Parse a Microsoft Individual Code Signing blob
*/
int mscode_parse(void *_ctx, const void *content_data, size_t data_len,
size_t asn1hdrlen)
{
struct pefile_context *ctx = _ctx;
content_data -= asn1hdrlen;
data_len += asn1hdrlen;
pr_devel("Data: %zu [%*ph]\n", data_len, (unsigned)(data_len),
content_data);
return asn1_ber_decoder(&mscode_decoder, ctx, content_data, data_len);
}
/**
* rsa_parse_pub_key() - extracts an rsa private key from BER encoded buffer
* and stores it in the provided struct rsa_key
*
* @rsa_key: struct rsa_key key representation
* @key: key in BER format
* @key_len: length of key
*
* Return: 0 on success or error code in case of error
*/
int rsa_parse_priv_key(struct rsa_key *rsa_key, const void *key,
unsigned int key_len)
{
int ret;
free_mpis(rsa_key);
ret = asn1_ber_decoder(&rsaprivkey_decoder, rsa_key, key, key_len);
if (ret < 0)
goto error;
return 0;
error:
free_mpis(rsa_key);
return ret;
}
static int qat_rsa_setkey(struct crypto_akcipher *tfm, const void *key,
unsigned int keylen)
{
struct qat_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
struct device *dev = &GET_DEV(ctx->inst->accel_dev);
int ret;
/* Free the old key if any */
if (ctx->n)
dma_free_coherent(dev, ctx->key_sz, ctx->n, ctx->dma_n);
if (ctx->e)
dma_free_coherent(dev, ctx->key_sz, ctx->e, ctx->dma_e);
if (ctx->d) {
memset(ctx->d, '\0', ctx->key_sz);
dma_free_coherent(dev, ctx->key_sz, ctx->d, ctx->dma_d);
}
ctx->n = NULL;
ctx->e = NULL;
ctx->d = NULL;
ret = asn1_ber_decoder(&qat_rsakey_decoder, ctx, key, keylen);
if (ret < 0)
goto free;
if (!ctx->n || !ctx->e) {
/* invalid key provided */
ret = -EINVAL;
goto free;
}
return 0;
free:
if (ctx->d) {
memset(ctx->d, '\0', ctx->key_sz);
dma_free_coherent(dev, ctx->key_sz, ctx->d, ctx->dma_d);
ctx->d = NULL;
}
if (ctx->e) {
dma_free_coherent(dev, ctx->key_sz, ctx->e, ctx->dma_e);
ctx->e = NULL;
}
if (ctx->n) {
dma_free_coherent(dev, ctx->key_sz, ctx->n, ctx->dma_n);
ctx->n = NULL;
ctx->key_sz = 0;
}
return ret;
}
/*
* Parse a Microsoft Individual Code Signing blob
*/
int mscode_parse(struct pefile_context *ctx)
{
const void *content_data;
size_t data_len;
int ret;
ret = pkcs7_get_content_data(ctx->pkcs7, &content_data, &data_len, 1);
if (ret) {
pr_debug("PKCS#7 message does not contain data\n");
return ret;
}
pr_devel("Data: %zu [%*ph]\n", data_len, (unsigned)(data_len),
content_data);
return asn1_ber_decoder(&mscode_decoder, ctx, content_data, data_len);
}
int
PrintCerts(UINT8 *data, UINTN len, EFI_HANDLE image, CHAR16 *name)
{
EFI_SIGNATURE_LIST *CertList = (EFI_SIGNATURE_LIST *)data;
EFI_SIGNATURE_DATA *Cert;
EFI_GUID gX509 = EFI_CERT_X509_GUID;
EFI_GUID gPKCS7 = EFI_CERT_PKCS7_GUID;
EFI_GUID gRSA2048 = EFI_CERT_RSA2048_GUID;
UINTN Index, count = 0, DataSize = len, CertCount;
UINTN buflen;
CHAR16 *ext;
int status = 0;
while ((DataSize > 0) && (DataSize >= CertList->SignatureListSize)) {
count++;
CertCount = (CertList->SignatureListSize - CertList->SignatureHeaderSize) / CertList->SignatureSize;
Cert = (EFI_SIGNATURE_DATA *) ((UINT8 *) CertList + sizeof (EFI_SIGNATURE_LIST) + CertList->SignatureHeaderSize);
// should all be X509 but just in case ...
if (CompareGuid(&CertList->SignatureType, &gX509) == 0)
ext = L"X509";
else if (CompareGuid(&CertList->SignatureType, &gPKCS7) == 0)
ext = L"PKCS7";
else if (CompareGuid(&CertList->SignatureType, &gRSA2048) == 0)
ext = L"RSA2048";
else
ext = L"Unknown";
for (Index = 0; Index < CertCount; Index++) {
if ( CertList->SignatureSize > 100 ) {
Print(L"\nType: %s (GUID: %g)\n", ext, &Cert->SignatureOwner);
buflen = CertList->SignatureSize-sizeof(EFI_GUID);
status = asn1_ber_decoder(&x509_decoder, NULL, Cert->SignatureData, buflen);
}
Cert = (EFI_SIGNATURE_DATA *) ((UINT8 *) Cert + CertList->SignatureSize);
}
DataSize -= CertList->SignatureListSize;
CertList = (EFI_SIGNATURE_LIST *) ((UINT8 *) CertList + CertList->SignatureListSize);
}
return status;
}
/*
* Parse an X.509 certificate
*/
struct x509_certificate *x509_cert_parse(const void *data, size_t datalen)
{
struct x509_certificate *cert;
struct x509_parse_context *ctx;
struct asymmetric_key_id *kid;
long ret;
ret = -ENOMEM;
cert = kzalloc(sizeof(struct x509_certificate), GFP_KERNEL);
if (!cert)
goto error_no_cert;
cert->pub = kzalloc(sizeof(struct public_key), GFP_KERNEL);
if (!cert->pub)
goto error_no_ctx;
ctx = kzalloc(sizeof(struct x509_parse_context), GFP_KERNEL);
if (!ctx)
goto error_no_ctx;
ctx->cert = cert;
ctx->data = (unsigned long)data;
/* Attempt to decode the certificate */
ret = asn1_ber_decoder(&x509_decoder, ctx, data, datalen);
if (ret < 0)
goto error_decode;
/* Decode the AuthorityKeyIdentifier */
if (ctx->raw_akid) {
pr_devel("AKID: %u %*phN\n",
ctx->raw_akid_size, ctx->raw_akid_size, ctx->raw_akid);
ret = asn1_ber_decoder(&x509_akid_decoder, ctx,
ctx->raw_akid, ctx->raw_akid_size);
if (ret < 0) {
pr_warn("Couldn't decode AuthKeyIdentifier\n");
goto error_decode;
}
}
/* Decode the public key */
ret = asn1_ber_decoder(&x509_rsakey_decoder, ctx,
ctx->key, ctx->key_size);
if (ret < 0)
goto error_decode;
/* Generate cert issuer + serial number key ID */
kid = asymmetric_key_generate_id(cert->raw_serial,
cert->raw_serial_size,
cert->raw_issuer,
cert->raw_issuer_size);
if (IS_ERR(kid)) {
ret = PTR_ERR(kid);
goto error_decode;
}
cert->id = kid;
kfree(ctx);
return cert;
error_decode:
kfree(ctx);
error_no_ctx:
x509_free_certificate(cert);
error_no_cert:
return ERR_PTR(ret);
}