From f46a878e3f31fb8818e97ab7d38e44d9c68fd0b2 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Bodo=20M=C3=B6ller?= <bodo@openssl.org>
Date: Thu, 8 Mar 2001 21:53:29 +0000
Subject: [PATCH] add ssl23_peek

---
 ssl/s23_lib.c | 38 ++++++++++++++++++++++++--------------
 ssl/ssl.h     |  3 ++-
 ssl/ssl_err.c |  1 +
 ssl/ssl_lib.c |  6 ++++++
 4 files changed, 33 insertions(+), 15 deletions(-)

diff --git a/ssl/s23_lib.c b/ssl/s23_lib.c
index dded7a19c5..ad2d8dadf7 100644
--- a/ssl/s23_lib.c
+++ b/ssl/s23_lib.c
@@ -63,6 +63,7 @@
 static int ssl23_num_ciphers(void );
 static SSL_CIPHER *ssl23_get_cipher(unsigned int u);
 static int ssl23_read(SSL *s, void *buf, int len);
+static int ssl23_peek(SSL *s, void *buf, int len);
 static int ssl23_write(SSL *s, const void *buf, int len);
 static long ssl23_default_timeout(void );
 static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p);
@@ -77,7 +78,7 @@ static SSL_METHOD SSLv23_data= {
 	ssl_undefined_function,
 	ssl_undefined_function,
 	ssl23_read,
-	(int (*)(struct ssl_st *, char *, int))ssl_undefined_function,
+	ssl23_peek,
 	ssl23_write,
 	ssl_undefined_function,
 	ssl_undefined_function,
@@ -169,13 +170,6 @@ static int ssl23_read(SSL *s, void *buf, int len)
 	{
 	int n;
 
-#if 0
-	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
-		{
-		s->rwstate=SSL_NOTHING;
-		return(0);
-		}
-#endif
 	clear_sys_error();
 	if (SSL_in_init(s) && (!s->in_handshake))
 		{
@@ -195,17 +189,33 @@ static int ssl23_read(SSL *s, void *buf, int len)
 		}
 	}
 
-static int ssl23_write(SSL *s, const void *buf, int len)
+static int ssl23_peek(SSL *s, void *buf, int len)
 	{
 	int n;
 
-#if 0
-	if (s->shutdown & SSL_SENT_SHUTDOWN)
+	clear_sys_error();
+	if (SSL_in_init(s) && (!s->in_handshake))
+		{
+		n=s->handshake_func(s);
+		if (n < 0) return(n);
+		if (n == 0)
+			{
+			SSLerr(SSL_F_SSL23_PEEK,SSL_R_SSL_HANDSHAKE_FAILURE);
+			return(-1);
+			}
+		return(SSL_peek(s,buf,len));
+		}
+	else
 		{
-		s->rwstate=SSL_NOTHING;
-		return(0);
+		ssl_undefined_function(s);
+		return(-1);
 		}
-#endif
+	}
+
+static int ssl23_write(SSL *s, const void *buf, int len)
+	{
+	int n;
+
 	clear_sys_error();
 	if (SSL_in_init(s) && (!s->in_handshake))
 		{
diff --git a/ssl/ssl.h b/ssl/ssl.h
index fad7a0e70b..bafefe6ad0 100644
--- a/ssl/ssl.h
+++ b/ssl/ssl.h
@@ -1209,6 +1209,7 @@ int SSL_COMP_add_compression_method(int id,char *cm);
 /* The following lines are auto generated by the script mkerr.pl. Any changes
  * made after this point may be overwritten when the script is next run.
  */
+void ERR_load_SSL_strings(void);
 
 /* Error codes for the SSL functions. */
 
@@ -1233,6 +1234,7 @@ int SSL_COMP_add_compression_method(int id,char *cm);
 #define SSL_F_SSL23_CONNECT				 117
 #define SSL_F_SSL23_GET_CLIENT_HELLO			 118
 #define SSL_F_SSL23_GET_SERVER_HELLO			 119
+#define SSL_F_SSL23_PEEK				 237
 #define SSL_F_SSL23_READ				 120
 #define SSL_F_SSL23_WRITE				 121
 #define SSL_F_SSL2_ACCEPT				 122
@@ -1562,4 +1564,3 @@ int SSL_COMP_add_compression_method(int id,char *cm);
 }
 #endif
 #endif
-
diff --git a/ssl/ssl_err.c b/ssl/ssl_err.c
index 9945758104..1ae3333407 100644
--- a/ssl/ssl_err.c
+++ b/ssl/ssl_err.c
@@ -86,6 +86,7 @@ static ERR_STRING_DATA SSL_str_functs[]=
 {ERR_PACK(0,SSL_F_SSL23_CONNECT,0),	"SSL23_CONNECT"},
 {ERR_PACK(0,SSL_F_SSL23_GET_CLIENT_HELLO,0),	"SSL23_GET_CLIENT_HELLO"},
 {ERR_PACK(0,SSL_F_SSL23_GET_SERVER_HELLO,0),	"SSL23_GET_SERVER_HELLO"},
+{ERR_PACK(0,SSL_F_SSL23_PEEK,0),	"SSL23_PEEK"},
 {ERR_PACK(0,SSL_F_SSL23_READ,0),	"SSL23_READ"},
 {ERR_PACK(0,SSL_F_SSL23_WRITE,0),	"SSL23_WRITE"},
 {ERR_PACK(0,SSL_F_SSL2_ACCEPT,0),	"SSL2_ACCEPT"},
diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c
index fec98dd8f4..5f670e276a 100644
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -726,6 +726,12 @@ int SSL_read(SSL *s,char *buf,int num)
 
 int SSL_peek(SSL *s,char *buf,int num)
 	{
+	if (s->handshake_func == 0)
+		{
+		SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
+		return -1;
+		}
+
 	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 		{
 		return(0);
-- 
2.25.1