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Fix empty union when TLS is disabled

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When all TLS 1.2 support is disabled, union mbedtls_ssl_premaster_secret was
empty, which is not valid C even if the union is never used. Fixes #6628.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2023-06-25 21:41:58 +02:00
parent 1873d3bfc2
commit e8e1e157cb
2 changed files with 4 additions and 0 deletions
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ChangeLog.d/ssl_premaster_secret-empty.txt Normal file
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@ -0,0 +1,3 @@
Bugfix
* Fix a compilation error on some platforms when including mbedtls/ssl.h
with all TLS support disabled. Fixes #6628.

1
include/mbedtls/ssl.h
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@ -620,6 +620,7 @@
/* Dummy type used only for its size */
union mbedtls_ssl_premaster_secret {
unsigned char dummy; /* Make the union non-empty even with SSL disabled */
#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
unsigned char _pms_rsa[48]; /* RFC 5246 8.1.1 */
#endif