Commit 0f229cce authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Add support for application defined signature algorithms for use with 

TLS v1.2. These are sent as an extension for clients and during a certificate
request for servers.

TODO: add support for shared signature algorithms, respect shared algorithms
when deciding which ciphersuites and certificates to permit.
parent 02009140

CHANGES

+5 −0
Original line number Diff line number Diff line
@@ -4,6 +4,11 @@ 


 Changes between 1.0.1 and 1.1.0  [xx XXX xxxx]



  *) Add new functions to allow customised supported signature algorithms

     for SSL and SSL_CTX structures. Add options to s_client and s_server

     to support them.

     [Steve Henson]



  *) New function SSL_certs_clear() to delete all references to certificates

     from an SSL structure. Before this once a certificate had been added

     it couldn't be removed.

apps/s_client.c

+12 −0
Original line number Diff line number Diff line
@@ -606,6 +606,7 @@ int MAIN(int argc, char **argv) 
#ifndef OPENSSL_NO_TLSEXT

	char *servername = NULL; 

	char *curves=NULL;

	char *sigalgs=NULL;

        tlsextctx tlsextcbp = 

        {NULL,0};

# ifndef OPENSSL_NO_NEXTPROTONEG
@@ -958,6 +959,11 @@ int MAIN(int argc, char **argv) 
			if (--argc < 1) goto bad;

			curves= *(++argv);

			}

		else if	(strcmp(*argv,"-sigalgs") == 0)

			{

			if (--argc < 1) goto bad;

			sigalgs= *(++argv);

			}

#endif

#ifndef OPENSSL_NO_JPAKE

		else if (strcmp(*argv,"-jpake") == 0)
@@ -1203,6 +1209,12 @@ bad: 
		ERR_print_errors(bio_err);

		goto end;

	}

	if (sigalgs != NULL)

		if(!SSL_CTX_set1_sigalgs_list(ctx,sigalgs)) {

		BIO_printf(bio_err,"error setting signature algorithms list\n");

		ERR_print_errors(bio_err);

		goto end;

	}

	if (servername != NULL)

		{

		tlsextcbp.biodebug = bio_err;

apps/s_server.c

+21 −0
Original line number Diff line number Diff line
@@ -274,6 +274,7 @@ static const char *s_cert_file=TEST_CERT,*s_key_file=NULL, *s_chain_file=NULL; 
#ifndef OPENSSL_NO_TLSEXT

static const char *s_cert_file2=TEST_CERT2,*s_key_file2=NULL;

static char *curves=NULL;

static char *sigalgs=NULL;

#endif

static char *s_dcert_file=NULL,*s_dkey_file=NULL, *s_dchain_file=NULL;

#ifdef FIONBIO
@@ -1205,6 +1206,11 @@ int MAIN(int argc, char *argv[]) 
			if (--argc < 1) goto bad;

			curves= *(++argv);

			}

		else if	(strcmp(*argv,"-sigalgs") == 0)

			{

			if (--argc < 1) goto bad;

			sigalgs= *(++argv);

			}

#endif

		else if	(strcmp(*argv,"-msg") == 0)

			{ s_msg=1; }
@@ -1925,6 +1931,21 @@ bad: 
			goto end;

			}

		}

	if (sigalgs)

		{

		if(!SSL_CTX_set1_sigalgs_list(ctx,sigalgs))

			{

			BIO_printf(bio_err,"error setting signature algorithms\n");

			ERR_print_errors(bio_err);

			goto end;

			}

		if(ctx2 && !SSL_CTX_set1_sigalgs_list(ctx2,sigalgs))

			{

			BIO_printf(bio_err,"error setting signature algorithms\n");

			ERR_print_errors(bio_err);

			goto end;

			}

		}

#endif

	SSL_CTX_set_verify(ctx,s_server_verify,verify_callback);

	SSL_CTX_set_session_id_context(ctx,(void*)&s_server_session_id_context,

ssl/s3_lib.c

+12 −0
Original line number Diff line number Diff line
@@ -3414,6 +3414,12 @@ long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg) 
		s->cert->ecdh_tmp_auto = larg;

		break;



	case SSL_CTRL_SET_SIGALGS:

		return tls1_set_sigalgs(s->cert, parg, larg);



	case SSL_CTRL_SET_SIGALGS_LIST:

		return tls1_set_sigalgs_list(s->cert, parg);



	default:

		break;

		}
@@ -3696,6 +3702,12 @@ long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 
		ctx->cert->ecdh_tmp_auto = larg;

		break;



	case SSL_CTRL_SET_SIGALGS:

		return tls1_set_sigalgs(ctx->cert, parg, larg);



	case SSL_CTRL_SET_SIGALGS_LIST:

		return tls1_set_sigalgs_list(ctx->cert, parg);



	case SSL_CTRL_SET_TLSEXT_AUTHZ_SERVER_AUDIT_PROOF_CB_ARG:

		ctx->tlsext_authz_server_audit_proof_cb_arg = parg;

		break;

ssl/s3_srvr.c

+1 −1
Original line number Diff line number Diff line
@@ -2066,7 +2066,7 @@ int ssl3_send_certificate_request(SSL *s) 


		if (TLS1_get_version(s) >= TLS1_2_VERSION)

			{

			nl = tls12_get_req_sig_algs(s, p + 2);

			nl = tls12_get_sig_algs(s, p + 2);

			s2n(nl, p);

			p += nl + 2;

			n += nl + 2;