+/*
+ * OpenSSL currently only uses a padding length of at most one block so the
+ * send overhead is smaller.
+ */
+
+# define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
+ (SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE)
+
+/* If compression isn't used don't include the compression overhead */
+
+# ifdef OPENSSL_NO_COMP
+# define SSL3_RT_MAX_COMPRESSED_LENGTH SSL3_RT_MAX_PLAIN_LENGTH
+# else
+# define SSL3_RT_MAX_COMPRESSED_LENGTH \
+ (SSL3_RT_MAX_PLAIN_LENGTH+SSL3_RT_MAX_COMPRESSED_OVERHEAD)
+# endif
+# define SSL3_RT_MAX_ENCRYPTED_LENGTH \
+ (SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH)
+# define SSL3_RT_MAX_PACKET_SIZE \
+ (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
+
+# define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54"
+# define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52"
+
+# define SSL3_VERSION 0x0300
+# define SSL3_VERSION_MAJOR 0x03
+# define SSL3_VERSION_MINOR 0x00
+
+# define SSL3_RT_CHANGE_CIPHER_SPEC 20
+# define SSL3_RT_ALERT 21
+# define SSL3_RT_HANDSHAKE 22
+# define SSL3_RT_APPLICATION_DATA 23
+# define TLS1_RT_HEARTBEAT 24
+
+/* Pseudo content types to indicate additional parameters */
+# define TLS1_RT_CRYPTO 0x1000
+# define TLS1_RT_CRYPTO_PREMASTER (TLS1_RT_CRYPTO | 0x1)
+# define TLS1_RT_CRYPTO_CLIENT_RANDOM (TLS1_RT_CRYPTO | 0x2)
+# define TLS1_RT_CRYPTO_SERVER_RANDOM (TLS1_RT_CRYPTO | 0x3)
+# define TLS1_RT_CRYPTO_MASTER (TLS1_RT_CRYPTO | 0x4)
+
+# define TLS1_RT_CRYPTO_READ 0x0000
+# define TLS1_RT_CRYPTO_WRITE 0x0100
+# define TLS1_RT_CRYPTO_MAC (TLS1_RT_CRYPTO | 0x5)
+# define TLS1_RT_CRYPTO_KEY (TLS1_RT_CRYPTO | 0x6)
+# define TLS1_RT_CRYPTO_IV (TLS1_RT_CRYPTO | 0x7)
+# define TLS1_RT_CRYPTO_FIXED_IV (TLS1_RT_CRYPTO | 0x8)
+
+/* Pseudo content type for SSL/TLS header info */
+# define SSL3_RT_HEADER 0x100
+
+# define SSL3_AL_WARNING 1
+# define SSL3_AL_FATAL 2
+
+# define SSL3_AD_CLOSE_NOTIFY 0
+# define SSL3_AD_UNEXPECTED_MESSAGE 10/* fatal */
+# define SSL3_AD_BAD_RECORD_MAC 20/* fatal */
+# define SSL3_AD_DECOMPRESSION_FAILURE 30/* fatal */
+# define SSL3_AD_HANDSHAKE_FAILURE 40/* fatal */
+# define SSL3_AD_NO_CERTIFICATE 41
+# define SSL3_AD_BAD_CERTIFICATE 42
+# define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
+# define SSL3_AD_CERTIFICATE_REVOKED 44
+# define SSL3_AD_CERTIFICATE_EXPIRED 45
+# define SSL3_AD_CERTIFICATE_UNKNOWN 46
+# define SSL3_AD_ILLEGAL_PARAMETER 47/* fatal */
+
+# define TLS1_HB_REQUEST 1
+# define TLS1_HB_RESPONSE 2
+
+# ifndef OPENSSL_NO_SSL_INTERN
+
+typedef struct ssl3_record_st {
+ /* type of record */
+ /*
+ * r
+ */ int type;
+ /* How many bytes available */
+ /*
+ * rw
+ */ unsigned int length;
+ /*
+ * How many bytes were available before padding was removed? This is used
+ * to implement the MAC check in constant time for CBC records.
+ */
+ /*
+ * rw
+ */ unsigned int orig_len;
+ /* read/write offset into 'buf' */
+ /*
+ * r
+ */ unsigned int off;
+ /* pointer to the record data */
+ /*
+ * rw
+ */ unsigned char *data;
+ /* where the decode bytes are */
+ /*
+ * rw
+ */ unsigned char *input;
+ /* only used with decompression - malloc()ed */
+ /*
+ * r
+ */ unsigned char *comp;
+ /* epoch number, needed by DTLS1 */
+ /*
+ * r
+ */ unsigned long epoch;
+ /* sequence number, needed by DTLS1 */
+ /*
+ * r
+ */ unsigned char seq_num[8];
+} SSL3_RECORD;
+
+typedef struct ssl3_buffer_st {
+ /* at least SSL3_RT_MAX_PACKET_SIZE bytes, see ssl3_setup_buffers() */
+ unsigned char *buf;
+ /* buffer size */
+ size_t len;
+ /* where to 'copy from' */
+ int offset;
+ /* how many bytes left */
+ int left;
+} SSL3_BUFFER;
+
+# endif
+
+# define SSL3_CT_RSA_SIGN 1
+# define SSL3_CT_DSS_SIGN 2
+# define SSL3_CT_RSA_FIXED_DH 3
+# define SSL3_CT_DSS_FIXED_DH 4
+# define SSL3_CT_RSA_EPHEMERAL_DH 5
+# define SSL3_CT_DSS_EPHEMERAL_DH 6
+# define SSL3_CT_FORTEZZA_DMS 20
+/*
+ * SSL3_CT_NUMBER is used to size arrays and it must be large enough to
+ * contain all of the cert types defined either for SSLv3 and TLSv1.
+ */
+# define SSL3_CT_NUMBER 9
+
+# define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS 0x0001
+# define SSL3_FLAGS_DELAY_CLIENT_FINISHED 0x0002
+# define SSL3_FLAGS_POP_BUFFER 0x0004
+# define TLS1_FLAGS_TLS_PADDING_BUG 0x0008
+# define TLS1_FLAGS_SKIP_CERT_VERIFY 0x0010
+# define TLS1_FLAGS_KEEP_HANDSHAKE 0x0020
+/*
+ * Set when the handshake is ready to process peer's ChangeCipherSpec message.
+ * Cleared after the message has been processed.
+ */
+# define SSL3_FLAGS_CCS_OK 0x0080
+
+/* Set if we encrypt then mac instead of usual mac then encrypt */
+# define TLS1_FLAGS_ENCRYPT_THEN_MAC 0x0100
+
+# ifndef OPENSSL_NO_SSL_INTERN
+
+typedef struct ssl3_state_st {
+ long flags;
+ int delay_buf_pop_ret;
+ unsigned char read_sequence[8];
+ int read_mac_secret_size;
+ unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
+ unsigned char write_sequence[8];
+ int write_mac_secret_size;
+ unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
+ unsigned char server_random[SSL3_RANDOM_SIZE];
+ unsigned char client_random[SSL3_RANDOM_SIZE];
+ /* flags for countermeasure against known-IV weakness */
+ int need_empty_fragments;
+ int empty_fragment_done;
+ /* The value of 'extra' when the buffers were initialized */
+ int init_extra;
+ SSL3_BUFFER rbuf; /* read IO goes into here */
+ SSL3_BUFFER wbuf; /* write IO goes into here */
+ SSL3_RECORD rrec; /* each decoded record goes in here */
+ SSL3_RECORD wrec; /* goes out from here */
+ /*
+ * storage for Alert/Handshake protocol data received but not yet
+ * processed by ssl3_read_bytes:
+ */
+ unsigned char alert_fragment[2];
+ unsigned int alert_fragment_len;
+ unsigned char handshake_fragment[4];
+ unsigned int handshake_fragment_len;
+ /* partial write - check the numbers match */
+ unsigned int wnum; /* number of bytes sent so far */
+ int wpend_tot; /* number bytes written */
+ int wpend_type;
+ int wpend_ret; /* number of bytes submitted */
+ const unsigned char *wpend_buf;
+ /* used during startup, digest all incoming/outgoing packets */
+ BIO *handshake_buffer;
+ /*
+ * When set of handshake digests is determined, buffer is hashed and
+ * freed and MD_CTX-es for all required digests are stored in this array
+ */
+ EVP_MD_CTX **handshake_dgst;
+ /*
+ * Set whenever an expected ChangeCipherSpec message is processed.
+ * Unset when the peer's Finished message is received.
+ * Unexpected ChangeCipherSpec messages trigger a fatal alert.
+ */
+ int change_cipher_spec;
+ int warn_alert;
+ int fatal_alert;
+ /*
+ * we allow one fatal and one warning alert to be outstanding, send close
+ * alert via the warning alert
+ */
+ int alert_dispatch;
+ unsigned char send_alert[2];
+ /*
+ * This flag is set when we should renegotiate ASAP, basically when there
+ * is no more data in the read or write buffers
+ */
+ int renegotiate;
+ int total_renegotiations;
+ int num_renegotiations;
+ int in_read_app_data;
+ struct {
+ /* actually only needs to be 16+20 */
+ unsigned char cert_verify_md[EVP_MAX_MD_SIZE * 2];
+ /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
+ unsigned char finish_md[EVP_MAX_MD_SIZE * 2];
+ int finish_md_len;
+ unsigned char peer_finish_md[EVP_MAX_MD_SIZE * 2];
+ int peer_finish_md_len;
+ unsigned long message_size;
+ int message_type;
+ /* used to hold the new cipher we are going to use */
+ const SSL_CIPHER *new_cipher;
+# ifndef OPENSSL_NO_DH
+ DH *dh;
+# endif
+# ifndef OPENSSL_NO_ECDH
+ EC_KEY *ecdh; /* holds short lived ECDH key */
+# endif
+ /* used when SSL_ST_FLUSH_DATA is entered */
+ int next_state;
+ int reuse_message;
+ /* used for certificate requests */
+ int cert_req;
+ int ctype_num;
+ char ctype[SSL3_CT_NUMBER];
+ STACK_OF(X509_NAME) *ca_names;
+ int use_rsa_tmp;
+ int key_block_length;
+ unsigned char *key_block;
+ const EVP_CIPHER *new_sym_enc;
+ const EVP_MD *new_hash;
+ int new_mac_pkey_type;
+ int new_mac_secret_size;
+# ifndef OPENSSL_NO_COMP
+ const SSL_COMP *new_compression;
+# else
+ char *new_compression;
+# endif
+ int cert_request;
+ } tmp;
+
+ /* Connection binding to prevent renegotiation attacks */
+ unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
+ unsigned char previous_client_finished_len;
+ unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
+ unsigned char previous_server_finished_len;
+ int send_connection_binding; /* TODOEKR */
+
+# ifndef OPENSSL_NO_NEXTPROTONEG
+ /*
+ * Set if we saw the Next Protocol Negotiation extension from our peer.
+ */
+ int next_proto_neg_seen;
+# endif
+
+# ifndef OPENSSL_NO_TLSEXT
+
+ /*
+ * ALPN information (we are in the process of transitioning from NPN to
+ * ALPN.)
+ */
+
+ /*
+ * In a server these point to the selected ALPN protocol after the
+ * ClientHello has been processed. In a client these contain the protocol
+ * that the server selected once the ServerHello has been processed.
+ */
+ unsigned char *alpn_selected;
+ unsigned alpn_selected_len;
+
+# ifndef OPENSSL_NO_EC
+ /*
+ * This is set to true if we believe that this is a version of Safari
+ * running on OS X 10.6 or newer. We wish to know this because Safari on
+ * 10.8 .. 10.8.3 has broken ECDHE-ECDSA support.
+ */
+ char is_probably_safari;
+# endif /* !OPENSSL_NO_EC */
+
+# endif /* !OPENSSL_NO_TLSEXT */
+} SSL3_STATE;
+
+# endif