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Fix error in handling of return value from mbedtls_nist_kw_unwrap

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2023-09-19 19:45:54 +01:00
parent f8182d91a7
commit 4fc14cc4ae
1 changed files with 2 additions and 2 deletions
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4
library/nist_kw.c
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@ -421,8 +421,8 @@ int mbedtls_nist_kw_unwrap(mbedtls_nist_kw_context *ctx,
* larger than 8, because of the type wrap around.
*/
padlen = in_len - KW_SEMIBLOCK_LENGTH - Plen;
ret = -((int) mbedtls_ct_uint_if_else_0(mbedtls_ct_uint_gt(padlen, 7),
-MBEDTLS_ERR_CIPHER_AUTH_FAILED));
ret = -((int) mbedtls_ct_uint_if(mbedtls_ct_uint_gt(padlen, 7),
-MBEDTLS_ERR_CIPHER_AUTH_FAILED, -ret));
padlen &= 7;
/* Check padding in "constant-time" */