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linux-user: Add support for setsockopt() option SOL_ALG

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Add support for options SOL_ALG of the syscall setsockopt(). This
option is used in relation to Linux kernel Crypto API, and allows
a user to set additional information for the cipher operation via
syscall setsockopt(). The field "optname" must be one of the
following:

  - ALG_SET_KEY – seting the key
  - ALG_SET_AEAD_AUTHSIZE – set the authentication tag size

SOL_ALG is relatively newer setsockopt() option. Therefore, the
code that handles SOL_ALG is enclosed in "ifdef" so that the build
does not fail for older kernels that do not contain support for
SOL_ALG. "ifdef" also contains check if ALG_SET_KEY and
ALG_SET_AEAD_AUTHSIZE are defined.

Signed-off-by: Yunqiang Su <ysu@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <1560953834-29584-3-git-send-email-aleksandar.markovic@rt-rk.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Yunqiang Su
2019-06-19 16:17:11 +02:00
committed by Laurent Vivier
parent 524fa3408e
commit f31dddd2fc
1 changed files with 31 additions and 0 deletions
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31
linux-user/syscall.c
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@@ -102,6 +102,7 @@
#include <linux/blkpg.h>
#include <netpacket/packet.h>
#include <linux/netlink.h>
#include <linux/if_alg.h>
#include "linux_loop.h"
#include "uname.h"
@@ -1941,6 +1942,36 @@ static abi_long do_setsockopt(int sockfd, int level, int optname,
goto unimplemented;
}
break;
#if defined(SOL_ALG) && defined(ALG_SET_KEY) && defined(ALG_SET_AEAD_AUTHSIZE)
case SOL_ALG:
switch (optname) {
case ALG_SET_KEY:
{
char *alg_key = g_malloc(optlen);
if (!alg_key) {
return -TARGET_ENOMEM;
}
if (copy_from_user(alg_key, optval_addr, optlen)) {
g_free(alg_key);
return -TARGET_EFAULT;
}
ret = get_errno(setsockopt(sockfd, level, optname,
alg_key, optlen));
g_free(alg_key);
break;
}
case ALG_SET_AEAD_AUTHSIZE:
{
ret = get_errno(setsockopt(sockfd, level, optname,
NULL, optlen));
break;
}
default:
goto unimplemented;
}
break;
#endif
case TARGET_SOL_SOCKET:
switch (optname) {
case TARGET_SO_RCVTIMEO: