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Abort on unrecognised warning alerts

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A peer continually sending unrecognised warning alerts could mean that we
make no progress on a connection. We should abort rather than continuing if
we receive an unrecognised warning alert.

Thanks to Shi Lei for reporting this issue.

Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Matt Caswell 2016-09-12 11:04:51 +01:00
parent c0f9e23c6b
commit 77a6be4dfc
1 changed files with 8 additions and 2 deletions
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10
ssl/record/rec_layer_s3.c
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@ -1351,9 +1351,15 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
goto f_err;
}
#ifdef SSL_AD_MISSING_SRP_USERNAME
else if (alert_descr == SSL_AD_MISSING_SRP_USERNAME)
return (0);
else if (alert_descr == SSL_AD_MISSING_SRP_USERNAME) {
return 0;
}
#endif
else {
al = SSL_AD_HANDSHAKE_FAILURE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE);
goto f_err;
}
} else if (alert_level == SSL3_AL_FATAL) {
char tmp[16];