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Expose mbedtls_ssl_get_hostname_pointer()

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In 2.28, the `hostname` field of `mbedtls_ssl_context` is part of the public
API. We've slightly changed its meaning in order to fix a security issue.
Document the new function mbedtls_ssl_get_hostname_pointer() which
returns what used to be the value of this field.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2025-02-20 17:44:48 +01:00
parent 7d193acf01
commit 6310e98fa5
4 changed files with 7 additions and 8 deletions
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5
include/mbedtls/ssl.h
View File

@@ -1449,7 +1449,10 @@ struct mbedtls_ssl_context {
* \p hostname argument.
* - A special value to indicate that mbedtls_ssl_set_hostname()
* was called with \p NULL (as opposed to never having been called).
* See `mbedtls_ssl_get_hostname_pointer()` in `ssl_tls.c`.
*
* If you need to obtain the value passed to
* mbedtls_ssl_set_hostname() even if it may have been called with
* \p NULL, call mbedtls_ssl_get_hostname_pointer().
*
* If this field contains the value \p NULL and the configuration option
* #MBEDTLS_SSL_CLI_ALLOW_WEAK_CERTIFICATE_VERIFICATION_WITHOUT_HOSTNAME

2
include/mbedtls/ssl_internal.h
View File

@@ -1214,7 +1214,6 @@ static inline size_t mbedtls_ssl_hs_hdr_len(const mbedtls_ssl_context *ssl)
return 4;
}
#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
/** Get the host name from the SSL context.
*
* \param[in] ssl SSL context
@@ -1224,7 +1223,6 @@ static inline size_t mbedtls_ssl_hs_hdr_len(const mbedtls_ssl_context *ssl)
* \p ssl or if it was last called with \p NULL.
*/
const char *mbedtls_ssl_get_hostname_pointer(const mbedtls_ssl_context *ssl);
#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
#if defined(MBEDTLS_SSL_PROTO_DTLS)
void mbedtls_ssl_send_flight_completed(mbedtls_ssl_context *ssl);