diff options
Diffstat (limited to 'ssl/s3_srvr.c')
| -rw-r--r-- | ssl/s3_srvr.c | 74 |
1 files changed, 24 insertions, 50 deletions
diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c index 65d7a359b3..cb6ef0adf5 100644 --- a/ssl/s3_srvr.c +++ b/ssl/s3_srvr.c @@ -692,15 +692,6 @@ int ssl3_accept(SSL *s) case SSL3_ST_SR_CERT_VRFY_A: case SSL3_ST_SR_CERT_VRFY_B: - /* - * This *should* be the first time we enable CCS, but be - * extra careful about surrounding code changes. We need - * to set this here because we don't know if we're - * expecting a CertificateVerify or not. - */ - if (!s->s3->change_cipher_spec) - s->s3->flags |= SSL3_FLAGS_CCS_OK; - /* we should decide if we expected this one */ ret = ssl3_get_cert_verify(s); if (ret <= 0) goto end; @@ -720,11 +711,10 @@ int ssl3_accept(SSL *s) case SSL3_ST_SR_NEXT_PROTO_A: case SSL3_ST_SR_NEXT_PROTO_B: /* - * Enable CCS for resumed handshakes with NPN. - * In a full handshake with NPN, we end up here through - * SSL3_ST_SR_CERT_VRFY_B, where SSL3_FLAGS_CCS_OK was - * already set. Receiving a CCS clears the flag, so make - * sure not to re-enable it to ban duplicates. + * Enable CCS for NPN. Receiving a CCS clears the flag, so make + * sure not to re-enable it to ban duplicates. This *should* be the + * first time we have received one - but we check anyway to be + * cautious. * s->s3->change_cipher_spec is set when a CCS is * processed in s3_pkt.c, and remains set until * the client's Finished message is read. @@ -743,10 +733,8 @@ int ssl3_accept(SSL *s) case SSL3_ST_SR_FINISHED_A: case SSL3_ST_SR_FINISHED_B: /* - * Enable CCS for resumed handshakes without NPN. - * In a full handshake, we end up here through - * SSL3_ST_SR_CERT_VRFY_B, where SSL3_FLAGS_CCS_OK was - * already set. Receiving a CCS clears the flag, so make + * Enable CCS for handshakes without NPN. In NPN the CCS flag has + * already been set. Receiving a CCS clears the flag, so make * sure not to re-enable it to ban duplicates. * s->s3->change_cipher_spec is set when a CCS is * processed in s3_pkt.c, and remains set until @@ -2963,39 +2951,31 @@ int ssl3_get_cert_verify(SSL *s) EVP_MD_CTX mctx; EVP_MD_CTX_init(&mctx); + /* + * We should only process a CertificateVerify message if we have received + * a Certificate from the client. If so then |s->session->peer| will be non + * NULL. In some instances a CertificateVerify message is not required even + * if the peer has sent a Certificate (e.g. such as in the case of static + * DH). In that case the ClientKeyExchange processing will skip the + * CertificateVerify state so we should not arrive here. + */ + if (s->session->peer == NULL) { + ret = 1; + goto end; + } + n = s->method->ssl_get_message(s, SSL3_ST_SR_CERT_VRFY_A, SSL3_ST_SR_CERT_VRFY_B, - -1, SSL3_RT_MAX_PLAIN_LENGTH, &ok); + SSL3_MT_CERTIFICATE_VERIFY, + SSL3_RT_MAX_PLAIN_LENGTH, &ok); if (!ok) return ((int)n); - if (s->session->peer != NULL) { - peer = s->session->peer; - pkey = X509_get_pubkey(peer); - type = X509_certificate_type(peer, pkey); - } else { - peer = NULL; - pkey = NULL; - } - - if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) { - s->s3->tmp.reuse_message = 1; - if (peer != NULL) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, SSL_R_MISSING_VERIFY_MESSAGE); - goto f_err; - } - ret = 1; - goto end; - } - - if (peer == NULL) { - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, SSL_R_NO_CLIENT_CERT_RECEIVED); - al = SSL_AD_UNEXPECTED_MESSAGE; - goto f_err; - } + peer = s->session->peer; + pkey = X509_get_pubkey(peer); + type = X509_certificate_type(peer, pkey); if (!(type & EVP_PKT_SIGN)) { SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, @@ -3004,12 +2984,6 @@ int ssl3_get_cert_verify(SSL *s) goto f_err; } - if (s->s3->change_cipher_spec) { - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, SSL_R_CCS_RECEIVED_EARLY); - al = SSL_AD_UNEXPECTED_MESSAGE; - goto f_err; - } - /* we now have a signature that we need to verify */ p = (unsigned char *)s->init_msg; /* Check for broken implementations of GOST ciphersuites */ |