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Return PSA_ERROR_INVALID_PADDING in constant time

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Signed-off-by: Gilles Peskine <[email protected]>
This commit is contained in:
Gilles Peskine
2025-09-08 12:22:39 +02:00
parent d179dc80a5
commit e74b42832e
1 changed files with 4 additions and 2 deletions
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library/psa_crypto_cipher.c
+4 -2
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@@ -13,6 +13,7 @@
#include "psa_crypto_cipher.h"
#include "psa_crypto_core.h"
#include "psa_crypto_random_impl.h"
#include "constant_time_internal.h"
#include "mbedtls/cipher.h"
#include "mbedtls/error.h"
@@ -583,8 +584,9 @@ exit:
mbedtls_platform_zeroize(temp_output_buffer,
sizeof(temp_output_buffer));
if (status == PSA_SUCCESS && invalid_padding) {
status = PSA_ERROR_INVALID_PADDING;
if (status == PSA_SUCCESS) {
status = mbedtls_ct_size_if_else_0(invalid_padding,
PSA_ERROR_INVALID_PADDING);
}
return status;
}