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/*
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2017-2019 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "netlink.h"
#include "nlattr.h"
#include "print_fields.h"
#if HAVE_LINUX_CRYPTOUSER_H
# include <linux/cryptouser.h>
#endif
#include "xlat/crypto_nl_attrs.h"
#define XLAT_MACROS_ONLY
# include "xlat/crypto_msgs.h"
#undef XLAT_MACROS_ONLY
#ifndef CRYPTO_MAX_NAME
# define CRYPTO_MAX_NAME 64
#endif
typedef struct {
char cru_name[CRYPTO_MAX_NAME];
char cru_driver_name[CRYPTO_MAX_NAME];
char cru_module_name[CRYPTO_MAX_NAME];
uint32_t cru_type;
uint32_t cru_mask;
uint32_t cru_refcnt;
uint32_t cru_flags;
} struct_crypto_user_alg;
typedef struct {
char type[CRYPTO_MAX_NAME];
uint32_t blocksize;
uint32_t digestsize;
} struct_crypto_report_hash;
typedef struct {
char type[CRYPTO_MAX_NAME];
uint32_t blocksize;
uint32_t min_keysize;
uint32_t max_keysize;
} struct_crypto_report_cipher;
typedef struct {
char type[CRYPTO_MAX_NAME];
char geniv[CRYPTO_MAX_NAME];
uint32_t blocksize;
uint32_t min_keysize;
uint32_t max_keysize;
uint32_t ivsize;
} struct_crypto_report_blkcipher;
typedef struct {
char type[CRYPTO_MAX_NAME];
char geniv[CRYPTO_MAX_NAME];
uint32_t blocksize;
uint32_t maxauthsize;
uint32_t ivsize;
} struct_crypto_report_aead;
typedef struct {
char type[CRYPTO_MAX_NAME];
uint32_t seedsize;
} struct_crypto_report_rng;
#ifdef HAVE_STRUCT_CRYPTO_USER_ALG
static_assert(sizeof(struct_crypto_user_alg) == sizeof(struct crypto_user_alg),
"struct crypto_user_alg mismatch, please update the decoder");
#endif
#ifdef HAVE_STRUCT_CRYPTO_REPORT_HASH
static_assert(sizeof(struct_crypto_report_hash)
== sizeof(struct crypto_report_hash),
"struct crypto_report_hash mismatch, please update the decoder");
#endif
#ifdef HAVE_STRUCT_CRYPTO_REPORT_CIPHER
static_assert(sizeof(struct_crypto_report_cipher)
== sizeof(struct crypto_report_cipher),
"struct crypto_report_cipher mismatch, please update the decoder");
#endif
#ifdef HAVE_STRUCT_CRYPTO_REPORT_BLKCIPHER
static_assert(sizeof(struct_crypto_report_blkcipher)
== sizeof(struct crypto_report_blkcipher),
"struct crypto_report_blkcipher mismatch, please update the decoder");
#endif
#ifdef HAVE_STRUCT_CRYPTO_REPORT_AEAD
static_assert(sizeof(struct_crypto_report_aead)
== sizeof(struct crypto_report_aead),
"struct crypto_report_aead mismatch, please update the decoder");
#endif
#ifdef HAVE_STRUCT_CRYPTO_REPORT_RNG
static_assert(sizeof(struct_crypto_report_rng)
== sizeof(struct crypto_report_rng),
"struct crypto_report_rng mismatch, please update the decoder");
#endif
static bool
decode_crypto_report_generic(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
tprints("{type=");
printstr_ex(tcp, addr, len, QUOTE_0_TERMINATED);
tprints("}");
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)) {
PRINT_FIELD_CSTRING("{", rhash, type);
PRINT_FIELD_U(", ", rhash, blocksize);
PRINT_FIELD_U(", ", rhash, digestsize);
tprints("}");
}
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)) {
PRINT_FIELD_CSTRING("{", rblkcipher, type);
PRINT_FIELD_CSTRING(", ", rblkcipher, geniv);
PRINT_FIELD_U(", ", rblkcipher, blocksize);
PRINT_FIELD_U(", ", rblkcipher, min_keysize);
PRINT_FIELD_U(", ", rblkcipher, max_keysize);
PRINT_FIELD_U(", ", rblkcipher, ivsize);
tprints("}");
}
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)) {
PRINT_FIELD_CSTRING("{", raead, type);
PRINT_FIELD_CSTRING(", ", raead, geniv);
PRINT_FIELD_U(", ", raead, blocksize);
PRINT_FIELD_U(", ", raead, maxauthsize);
PRINT_FIELD_U(", ", raead, ivsize);
tprints("}");
}
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)) {
PRINT_FIELD_CSTRING("{", rrng, type);
PRINT_FIELD_U(", ", rrng, seedsize);
tprints("}");
}
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)) {
PRINT_FIELD_CSTRING("{", rcipher, type);
PRINT_FIELD_U(", ", rcipher, blocksize);
PRINT_FIELD_U(", ", rcipher, min_keysize);
PRINT_FIELD_U(", ", rcipher, max_keysize);
tprints("}");
}
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)) {
PRINT_FIELD_CSTRING("{", alg, cru_name);
PRINT_FIELD_CSTRING(", ", alg, cru_driver_name);
PRINT_FIELD_CSTRING(", ", alg, cru_module_name);
PRINT_FIELD_X(", ", alg, cru_type);
PRINT_FIELD_X(", ", alg, cru_mask);
PRINT_FIELD_U(", ", alg, cru_refcnt);
PRINT_FIELD_X(", ", alg, cru_flags);
tprints("}");
const size_t offset = NLMSG_ALIGN(sizeof(alg));
if (len > offset) {
tprints(", ");
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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