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Simplify unnecessarily complex error code handling

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2023-09-20 09:13:12 +01:00
parent fd96579ecd
commit ee5464fab9
2 changed files with 4 additions and 4 deletions
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4
library/cipher.c
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@ -915,7 +915,7 @@ static int get_one_and_zeros_padding(unsigned char *input, size_t input_len,
in_padding = mbedtls_ct_bool_and(in_padding, mbedtls_ct_bool_not(is_nonzero));
}
return -((int) mbedtls_ct_uint_if_else_0(bad, -MBEDTLS_ERR_CIPHER_INVALID_PADDING));
return (int) mbedtls_ct_uint_if_else_0(bad, MBEDTLS_ERR_CIPHER_INVALID_PADDING);
}
#endif /* MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS */
@ -962,7 +962,7 @@ static int get_zeros_and_len_padding(unsigned char *input, size_t input_len,
bad = mbedtls_ct_bool_or(bad, nonzero_pad_byte);
}
return -((int) mbedtls_ct_uint_if_else_0(bad, -MBEDTLS_ERR_CIPHER_INVALID_PADDING));
return (int) mbedtls_ct_uint_if_else_0(bad, MBEDTLS_ERR_CIPHER_INVALID_PADDING);
}
#endif /* MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN */

4
library/nist_kw.c
View file

@ -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(mbedtls_ct_uint_gt(padlen, 7),
-MBEDTLS_ERR_CIPHER_AUTH_FAILED, -ret));
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" */