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/*
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2017-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "netlink.h"
#include "nlattr.h"
#include <linux/cryptouser.h>
#include "xlat/crypto_nl_attrs.h"
static bool
decode_crypto_report_generic(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
tprint_struct_begin();
tprints_field_name("type");
printstr_ex(tcp, addr, len, QUOTE_0_TERMINATED);
tprint_struct_end();
return true;
}
static bool
decode_crypto_report_hash(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct crypto_report_hash rhash;
if (len < sizeof(rhash))
printstrn(tcp, addr, len);
else if (!umove_or_printaddr(tcp, addr, &rhash)) {
tprint_struct_begin();
PRINT_FIELD_CSTRING(rhash, type);
tprint_struct_next();
PRINT_FIELD_U(rhash, blocksize);
tprint_struct_next();
PRINT_FIELD_U(rhash, digestsize);
tprint_struct_end();
}
return true;
}
static bool
decode_crypto_report_blkcipher(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct crypto_report_blkcipher rblkcipher;
if (len < sizeof(rblkcipher))
printstrn(tcp, addr, len);
else if (!umove_or_printaddr(tcp, addr, &rblkcipher)) {
tprint_struct_begin();
PRINT_FIELD_CSTRING(rblkcipher, type);
tprint_struct_next();
PRINT_FIELD_CSTRING(rblkcipher, geniv);
tprint_struct_next();
PRINT_FIELD_U(rblkcipher, blocksize);
tprint_struct_next();
PRINT_FIELD_U(rblkcipher, min_keysize);
tprint_struct_next();
PRINT_FIELD_U(rblkcipher, max_keysize);
tprint_struct_next();
PRINT_FIELD_U(rblkcipher, ivsize);
tprint_struct_end();
}
return true;
}
static bool
decode_crypto_report_aead(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct crypto_report_aead raead;
if (len < sizeof(raead))
printstrn(tcp, addr, len);
else if (!umove_or_printaddr(tcp, addr, &raead)) {
tprint_struct_begin();
PRINT_FIELD_CSTRING(raead, type);
tprint_struct_next();
PRINT_FIELD_CSTRING(raead, geniv);
tprint_struct_next();
PRINT_FIELD_U(raead, blocksize);
tprint_struct_next();
PRINT_FIELD_U(raead, maxauthsize);
tprint_struct_next();
PRINT_FIELD_U(raead, ivsize);
tprint_struct_end();
}
return true;
}
static bool
decode_crypto_report_rng(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct crypto_report_rng rrng;
if (len < sizeof(rrng))
printstrn(tcp, addr, len);
else if (!umove_or_printaddr(tcp, addr, &rrng)) {
tprint_struct_begin();
PRINT_FIELD_CSTRING(rrng, type);
tprint_struct_next();
PRINT_FIELD_U(rrng, seedsize);
tprint_struct_end();
}
return true;
}
static bool
decode_crypto_report_cipher(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct crypto_report_cipher rcipher;
if (len < sizeof(rcipher))
printstrn(tcp, addr, len);
else if (!umove_or_printaddr(tcp, addr, &rcipher)) {
tprint_struct_begin();
PRINT_FIELD_CSTRING(rcipher, type);
tprint_struct_next();
PRINT_FIELD_U(rcipher, blocksize);
tprint_struct_next();
PRINT_FIELD_U(rcipher, min_keysize);
tprint_struct_next();
PRINT_FIELD_U(rcipher, max_keysize);
tprint_struct_end();
}
return true;
}
static const nla_decoder_t crypto_user_alg_nla_decoders[] = {
[CRYPTOCFGA_PRIORITY_VAL] = decode_nla_u32,
[CRYPTOCFGA_REPORT_LARVAL] = decode_crypto_report_generic,
[CRYPTOCFGA_REPORT_HASH] = decode_crypto_report_hash,
[CRYPTOCFGA_REPORT_BLKCIPHER] = decode_crypto_report_blkcipher,
[CRYPTOCFGA_REPORT_AEAD] = decode_crypto_report_aead,
[CRYPTOCFGA_REPORT_COMPRESS] = decode_crypto_report_generic,
[CRYPTOCFGA_REPORT_RNG] = decode_crypto_report_rng,
[CRYPTOCFGA_REPORT_CIPHER] = decode_crypto_report_cipher,
[CRYPTOCFGA_REPORT_AKCIPHER] = decode_crypto_report_generic,
[CRYPTOCFGA_REPORT_KPP] = decode_crypto_report_generic,
[CRYPTOCFGA_REPORT_ACOMP] = decode_crypto_report_generic
};
static void
decode_crypto_user_alg(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len)
{
struct crypto_user_alg alg;
if (len < sizeof(alg))
printstrn(tcp, addr, len);
else if (!umove_or_printaddr(tcp, addr, &alg)) {
tprint_struct_begin();
PRINT_FIELD_CSTRING(alg, cru_name);
tprint_struct_next();
PRINT_FIELD_CSTRING(alg, cru_driver_name);
tprint_struct_next();
PRINT_FIELD_CSTRING(alg, cru_module_name);
tprint_struct_next();
PRINT_FIELD_X(alg, cru_type);
tprint_struct_next();
PRINT_FIELD_X(alg, cru_mask);
tprint_struct_next();
PRINT_FIELD_U(alg, cru_refcnt);
tprint_struct_next();
PRINT_FIELD_X(alg, cru_flags);
tprint_struct_end();
const size_t offset = NLMSG_ALIGN(sizeof(alg));
if (len > offset) {
tprint_array_next();
decode_nlattr(tcp, addr + offset, len - offset,
crypto_nl_attrs, "CRYPTOCFGA_???",
crypto_user_alg_nla_decoders,
ARRAY_SIZE(crypto_user_alg_nla_decoders),
NULL);
}
}
}
bool
decode_netlink_crypto(struct tcb *const tcp,
const struct nlmsghdr *const nlmsghdr,
const kernel_ulong_t addr,
const unsigned int len)
{
switch (nlmsghdr->nlmsg_type) {
case CRYPTO_MSG_NEWALG:
case CRYPTO_MSG_DELALG:
case CRYPTO_MSG_UPDATEALG:
case CRYPTO_MSG_GETALG:
decode_crypto_user_alg(tcp, addr, len);
break;
default:
return false;
}
return true;
}
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