diff options
Diffstat (limited to 'crypto/openssl/ssl/s3_msg.c')
| -rw-r--r-- | crypto/openssl/ssl/s3_msg.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/crypto/openssl/ssl/s3_msg.c b/crypto/openssl/ssl/s3_msg.c new file mode 100644 index 000000000000..6505e0009812 --- /dev/null +++ b/crypto/openssl/ssl/s3_msg.c @@ -0,0 +1,160 @@ +/* + * Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include "ssl_local.h" +#include "internal/ssl_unwrap.h" + +int ssl3_do_change_cipher_spec(SSL_CONNECTION *s) +{ + int i; + SSL *ssl = SSL_CONNECTION_GET_SSL(s); + + if (s->server) + i = SSL3_CHANGE_CIPHER_SERVER_READ; + else + i = SSL3_CHANGE_CIPHER_CLIENT_READ; + + if (s->s3.tmp.key_block == NULL) { + if (s->session == NULL || s->session->master_key_length == 0) { + /* might happen if dtls1_read_bytes() calls this */ + ERR_raise(ERR_LIB_SSL, SSL_R_CCS_RECEIVED_EARLY); + return 0; + } + + s->session->cipher = s->s3.tmp.new_cipher; + if (!ssl->method->ssl3_enc->setup_key_block(s)) { + /* SSLfatal() already called */ + return 0; + } + } + + if (!ssl->method->ssl3_enc->change_cipher_state(s, i)) { + /* SSLfatal() already called */ + return 0; + } + + return 1; +} + +int ssl3_send_alert(SSL_CONNECTION *s, int level, int desc) +{ + SSL *ssl = SSL_CONNECTION_GET_SSL(s); + + /* Map tls/ssl alert value to correct one */ + if (SSL_CONNECTION_TREAT_AS_TLS13(s)) + desc = tls13_alert_code(desc); + else + desc = ssl->method->ssl3_enc->alert_value(desc); + if (s->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION) + desc = SSL_AD_HANDSHAKE_FAILURE; /* SSL 3.0 does not have + * protocol_version alerts */ + if (desc < 0) + return -1; + if (s->shutdown & SSL_SENT_SHUTDOWN && desc != SSL_AD_CLOSE_NOTIFY) + return -1; + /* If a fatal one, remove from cache */ + if ((level == SSL3_AL_FATAL) && (s->session != NULL)) + SSL_CTX_remove_session(s->session_ctx, s->session); + + s->s3.alert_dispatch = SSL_ALERT_DISPATCH_PENDING; + s->s3.send_alert[0] = level; + s->s3.send_alert[1] = desc; + if (!RECORD_LAYER_write_pending(&s->rlayer)) { + /* data still being written out? */ + return ssl->method->ssl_dispatch_alert(ssl); + } + /* + * else data is still being written out, we will get written some time in + * the future + */ + return -1; +} + +int ssl3_dispatch_alert(SSL *s) +{ + int i, j; + void (*cb) (const SSL *ssl, int type, int val) = NULL; + SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s); + OSSL_RECORD_TEMPLATE templ; + + if (sc == NULL) + return -1; + + if (sc->rlayer.wrlmethod == NULL) { + /* No write record layer so we can't sent and alert. We just ignore it */ + sc->s3.alert_dispatch = SSL_ALERT_DISPATCH_NONE; + return 1; + } + + templ.type = SSL3_RT_ALERT; + templ.version = (sc->version == TLS1_3_VERSION) ? TLS1_2_VERSION + : sc->version; + if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO + && !sc->renegotiate + && TLS1_get_version(s) > TLS1_VERSION + && sc->hello_retry_request == SSL_HRR_NONE) { + templ.version = TLS1_VERSION; + } + templ.buf = &sc->s3.send_alert[0]; + templ.buflen = 2; + + if (RECORD_LAYER_write_pending(&sc->rlayer)) { + if (sc->s3.alert_dispatch != SSL_ALERT_DISPATCH_RETRY) { + /* + * We have a write pending but it wasn't from a previous call to + * this function! Can we ever get here? Maybe via API misuse?? + * Give up. + */ + sc->s3.alert_dispatch = SSL_ALERT_DISPATCH_NONE; + return -1; + } + /* Retry what we've already got pending */ + i = HANDLE_RLAYER_WRITE_RETURN(sc, + sc->rlayer.wrlmethod->retry_write_records(sc->rlayer.wrl)); + if (i <= 0) { + /* Could be NBIO. Keep alert_dispatch as SSL_ALERT_DISPATCH_RETRY */ + return -1; + } + sc->rlayer.wpend_tot = 0; + sc->s3.alert_dispatch = SSL_ALERT_DISPATCH_NONE; + return 1; + } + + i = HANDLE_RLAYER_WRITE_RETURN(sc, + sc->rlayer.wrlmethod->write_records(sc->rlayer.wrl, &templ, 1)); + + if (i <= 0) { + sc->s3.alert_dispatch = SSL_ALERT_DISPATCH_RETRY; + sc->rlayer.wpend_tot = templ.buflen; + sc->rlayer.wpend_type = templ.type; + sc->rlayer.wpend_buf = templ.buf; + } else { + /* + * Alert sent to BIO - now flush. If the message does not get sent due + * to non-blocking IO, we will not worry too much. + */ + (void)BIO_flush(sc->wbio); + sc->s3.alert_dispatch = SSL_ALERT_DISPATCH_NONE; + + if (sc->msg_callback) + sc->msg_callback(1, sc->version, SSL3_RT_ALERT, sc->s3.send_alert, + 2, s, sc->msg_callback_arg); + + if (sc->info_callback != NULL) + cb = sc->info_callback; + else if (s->ctx->info_callback != NULL) + cb = s->ctx->info_callback; + + if (cb != NULL) { + j = (sc->s3.send_alert[0] << 8) | sc->s3.send_alert[1]; + cb(s, SSL_CB_WRITE_ALERT, j); + } + } + return i; +} |