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crypto: ccp - Fix sample application signature passing

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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: f40d42f116 ("crypto: ccp - Add a sample python script for Dynamic Boost Control")
Fixes: febe3ed322 ("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>
This commit is contained in:
Mario Limonciello 2023-08-29 10:07:58 -05:00 committed by Herbert Xu
parent 70f242c193
commit 2ad01eb5fa
2 changed files with 4 additions and 2 deletions
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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