iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

crypto: ccp - Fix sample application signature passing

Browse Source 
[ Upstream commit 2ad01eb5fad24627ab4e196dc54a220753b2238b ]

When parameters are sent the PSP returns back it's own signature
for the application to verify the authenticity of the result.

Display this signature to the caller instead of the one the caller
sent.

Fixes: f40d42f116cf ("crypto: ccp - Add a sample python script for Dynamic Boost Control")
Fixes: febe3ed3222f ("crypto: ccp - Add a sample library for ioctl use")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mario Limonciello 2023-08-29 10:07:58 -05:00 committed by Greg Kroah-Hartman
parent 3b1ea9069a
commit e2866646d9
2 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/crypto/ccp/dbc.c
View File

@ -68,5 +68,6 @@ int process_param(int fd, int msg_index, __u8 *signature, int *data)
return errno;
*data = tmp.param;
memcpy(signature, tmp.signature, sizeof(tmp.signature));
return 0;
}

5
tools/crypto/ccp/dbc.py
View File

@ -57,7 +57,8 @@ def process_param(device, message, signature, data=None):
if type(message) != tuple:
raise ValueError("Expected message tuple")
arg = ctypes.c_int(data if data else 0)
ret = lib.process_param(device.fileno(), message[0], signature, ctypes.pointer(arg))
sig = ctypes.create_string_buffer(signature, len(signature))
ret = lib.process_param(device.fileno(), message[0], ctypes.pointer(sig), ctypes.pointer(arg))
if ret:
handle_error(ret)
return arg, signature
return arg.value, sig.value