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Remove restriction on value of MBEDTLS_SSL_CID_PADDING_GRANULARITY

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This commit is contained in:
Hanno Becker 2019-05-13 15:31:17 +01:00
parent ddf775a97f
commit b9ec44fcf6
2 changed files with 5 additions and 4 deletions
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3
include/mbedtls/config.h
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@ -3365,7 +3365,8 @@
* Note: A value of \c 1 means that no padding will be used * Note: A value of \c 1 means that no padding will be used
* for outgoing records. * for outgoing records.
* *
* The value MUST be a power of 2. * Note: On systems lacking division instructions,
* a power of two should be preferred.
* *
*/ */
//#define MBEDTLS_SSL_CID_PADDING_GRANULARITY 16 //#define MBEDTLS_SSL_CID_PADDING_GRANULARITY 16

6
library/ssl_tls.c
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@ -2013,9 +2013,9 @@ static int ssl_cid_build_inner_plaintext( unsigned char *content,
uint8_t rec_type ) uint8_t rec_type )
{ {
size_t len = *content_size; size_t len = *content_size;
size_t pad = ( MBEDTLS_SSL_CID_PADDING_GRANULARITY -
/* MBEDTLS_SSL_CID_PADDING_GRANULARITY must be a power of 2. */ ( len + 1 ) % MBEDTLS_SSL_CID_PADDING_GRANULARITY ) %
size_t pad = ~len & ( MBEDTLS_SSL_CID_PADDING_GRANULARITY - 1 ); MBEDTLS_SSL_CID_PADDING_GRANULARITY;
/* Write real content type */ /* Write real content type */
if( remaining == 0 ) if( remaining == 0 )