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2e3ec2e157
The server-side ChangeCipherState processing stores the new cipher in the SSL_SESSION object, so that the new state can be used if this session gets resumed. However, writing to the session is only thread-safe for initial handshakes, as at other times the session object may be in a shared cache and in use by another thread at the same time. Reflect this invariant in the code by only writing to s->session->cipher when it is currently NULL (we do not cache sessions with no cipher). The code prior to this change would never actually change the (non-NULL) cipher value in a session object, since our server enforces that (pre-TLS-1.3) resumptions use the exact same cipher as the initial connection, and non-abbreviated renegotiations have produced a new session object before we get to this point. Regardless, include logic to detect such a condition and abort the handshake if it occurs, to avoid any risk of inadvertently using the wrong cipher on a connection. Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> (Merged from https://github.com/openssl/openssl/pull/10943) |
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| .. | ||
| record | ||
| statem | ||
| bio_ssl.c | ||
| build.info | ||
| d1_lib.c | ||
| d1_msg.c | ||
| d1_srtp.c | ||
| methods.c | ||
| pqueue.c | ||
| s3_cbc.c | ||
| s3_enc.c | ||
| s3_lib.c | ||
| s3_msg.c | ||
| ssl_asn1.c | ||
| ssl_cert_table.h | ||
| ssl_cert.c | ||
| ssl_ciph.c | ||
| ssl_conf.c | ||
| ssl_err.c | ||
| ssl_init.c | ||
| ssl_lib.c | ||
| ssl_local.h | ||
| ssl_mcnf.c | ||
| ssl_rsa.c | ||
| ssl_sess.c | ||
| ssl_stat.c | ||
| ssl_txt.c | ||
| ssl_utst.c | ||
| t1_enc.c | ||
| t1_lib.c | ||
| t1_trce.c | ||
| tls13_enc.c | ||
| tls_srp.c | ||