Tidy/enhance certificate chain output code.
New function ssl_add_cert_chain which adds a certificate chain to
SSL internal BUF_MEM. Use this function in ssl3_output_cert_chain
and dtls1_output_cert_chain instead of partly duplicating code.
diff --git a/ssl/ssl_cert.c b/ssl/ssl_cert.c
index 917be31..c1e7ec1 100644
--- a/ssl/ssl_cert.c
+++ b/ssl/ssl_cert.c
@@ -851,3 +851,85 @@
return ret;
}
+/* Add a certificate to a BUF_MEM structure */
+
+static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
+ {
+ int n;
+ unsigned char *p;
+
+ n=i2d_X509(x,NULL);
+ if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
+ {
+ SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
+ return 0;
+ }
+ p=(unsigned char *)&(buf->data[*l]);
+ l2n3(n,p);
+ i2d_X509(x,&p);
+ *l+=n+3;
+
+ return 1;
+ }
+
+/* Add certificate chain to internal SSL BUF_MEM strcuture */
+int ssl_add_cert_chain(SSL *s, X509 *x, unsigned long *l)
+ {
+ BUF_MEM *buf = s->init_buf;
+ int no_chain;
+ int i;
+
+ if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
+ no_chain = 1;
+ else
+ no_chain = 0;
+
+ /* TLSv1 sends a chain with nothing in it, instead of an alert */
+ if (!BUF_MEM_grow_clean(buf,10))
+ {
+ SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
+ return 0;
+ }
+ if (x != NULL)
+ {
+ if (no_chain)
+ {
+ if (!ssl_add_cert_to_buf(buf, l, x))
+ return 0;
+ }
+ else
+ {
+ X509_STORE_CTX xs_ctx;
+
+ if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
+ {
+ SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
+ return(0);
+ }
+ X509_verify_cert(&xs_ctx);
+ /* Don't leave errors in the queue */
+ ERR_clear_error();
+ for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
+ {
+ x = sk_X509_value(xs_ctx.chain, i);
+
+ if (ssl_add_cert_to_buf(buf, l, x))
+ {
+ X509_STORE_CTX_cleanup(&xs_ctx);
+ return 0;
+ }
+ }
+ X509_STORE_CTX_cleanup(&xs_ctx);
+ }
+ }
+ /* Thawte special :-) */
+ for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
+ {
+ x=sk_X509_value(s->ctx->extra_certs,i);
+ if (!ssl_add_cert_to_buf(buf, l, x))
+ return 0;
+ }
+
+ return 1;
+ }
+
