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Added max length checking of hostname

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This commit is contained in:
Simon Butcher 2015-09-27 22:50:49 +01:00
parent f592e8eaf6
commit 89f77623b8
2 changed files with 6 additions and 0 deletions
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3
include/mbedtls/ssl.h
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@ -139,6 +139,9 @@
#define MBEDTLS_SSL_TRANSPORT_STREAM 0 /*!< TLS */ #define MBEDTLS_SSL_TRANSPORT_STREAM 0 /*!< TLS */
#define MBEDTLS_SSL_TRANSPORT_DATAGRAM 1 /*!< DTLS */ #define MBEDTLS_SSL_TRANSPORT_DATAGRAM 1 /*!< DTLS */
#define MBEDTLS_SSL_MAX_HOST_NAME 255 /*!< Maximum host name
defined in RFC 1035 */
/* RFC 6066 section 4, see also mfl_code_to_length in ssl_tls.c /* RFC 6066 section 4, see also mfl_code_to_length in ssl_tls.c
* NONE must be zero so that memset()ing structure to zero works */ * NONE must be zero so that memset()ing structure to zero works */
#define MBEDTLS_SSL_MAX_FRAG_LEN_NONE 0 /*!< don't use this extension */ #define MBEDTLS_SSL_MAX_FRAG_LEN_NONE 0 /*!< don't use this extension */

3
library/ssl_tls.c
View file

@ -5833,6 +5833,9 @@ int mbedtls_ssl_set_hostname( mbedtls_ssl_context *ssl, const char *hostname )
if( hostname_len + 1 == 0 ) if( hostname_len + 1 == 0 )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
if( hostname_len > MBEDTLS_SSL_MAX_HOST_NAME )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
ssl->hostname = mbedtls_calloc( 1, hostname_len + 1 ); ssl->hostname = mbedtls_calloc( 1, hostname_len + 1 );
if( ssl->hostname == NULL ) if( ssl->hostname == NULL )