- Support for PKCS#11 through the use of the pkcs11-helper library

ChangeLog

@@ -17,6 +17,8 @@ Note: Most of these features have been donated by Fox-IT
          status, objects and configuration
        + Added verification callback on certificate chain
          verification to allow external blacklisting
+   * Added support for PKCS#11 through the use of the
+     libpkcs11-helper library
 
 Changes
    * x509parse_time_expired() checks time in addition to

include/polarssl/config.h

@@ -319,6 +319,16 @@
  */
 #define POLARSSL_SSL_TLS_C
 
+/*
+ * Module:  library/ssl_srv.c
+ * Caller:  library/ssl_cli.c
+ *          library/ssl_srv.c
+ *
+ * This module is required for SSL/TLS PKCS #11 smartcard support.
+ * Requires the presence of the PKCS#11 helper library (libpkcs11-helper)
+ */
+#define POLARSSL_PKCS11_C
+
 /*
  * Module:  library/timing.c
  * Caller:  library/havege.c

include/polarssl/pkcs11.h

@@ -0,0 +1,127 @@
+/**
+ * \file pkcs11.h
+ *
+ * \brief Wrapper for PKCS#11 library libpkcs11-helper
+ *
+ * \author Adriaan de Jong <dejong@fox-it.com>
+ *
+ *  Copyright (C) 2006-2010, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef PKCS11_H_
+#define PKCS11_H_
+
+#include "polarssl/config.h"
+
+#if defined(POLARSSL_PKCS11_C)
+
+#include "polarssl/x509.h"
+
+#include <pkcs11-helper-1.0/pkcs11h-certificate.h>
+
+/**
+ * Context for PKCS #11 private keys.
+ */
+typedef struct {
+        pkcs11h_certificate_t pkcs11h_cert;
+        int len;
+} pkcs11_context;
+
+/**
+ * Fill in a PolarSSL certificate, based on the given PKCS11 helper certificate.
+ *
+ * \param cert          X.509 certificate to fill
+ * \param pkcs11h_cert  PKCS #11 helper certificate
+ *
+ * \return              0 on success.
+ */
+int pkcs11_x509_cert_init( x509_cert *cert, pkcs11h_certificate_t pkcs11h_cert );
+
+/**
+ * Initialise a pkcs11_context, storing the given certificate. Note that the
+ * pkcs11_context will take over control of the certificate, freeing it when
+ * done.
+ *
+ * \param priv_key      Private key structure to fill.
+ * \param pkcs11_cert   PKCS #11 helper certificate
+ *
+ * \return              0 on success
+ */
+int pkcs11_priv_key_init( pkcs11_context *priv_key,
+        pkcs11h_certificate_t pkcs11_cert );
+
+/**
+ * Free the contents of the given private key context. Note that the structure
+ * itself is not freed.
+ *
+ * \param priv_key      Private key structure to cleanup
+ */
+void pkcs11_priv_key_free( pkcs11_context *priv_key );
+
+/**
+ * \brief          Do an RSA private key decrypt, then remove the message padding
+ *
+ * \param ctx      PKCS #11 context
+ * \param mode     must be RSA_PRIVATE, for compatibility with rsa.c's signature
+ * \param input    buffer holding the encrypted data
+ * \param output   buffer that will hold the plaintext
+ * \param olen     will contain the plaintext length
+ * \param output_max_len    maximum length of the output buffer
+ *
+ * \return         0 if successful, or an POLARSSL_ERR_RSA_XXX error code
+ *
+ * \note           The output buffer must be as large as the size
+ *                 of ctx->N (eg. 128 bytes if RSA-1024 is used) otherwise
+ *                 an error is thrown.
+ */
+int pkcs11_decrypt( pkcs11_context *ctx,
+                       int mode, int *olen,
+                       const unsigned char *input,
+                       unsigned char *output,
+                       int output_max_len );
+
+/**
+ * \brief          Do a private RSA to sign a message digest
+ *
+ * \param ctx      PKCS #11 context
+ * \param mode     must be RSA_PRIVATE, for compatibility with rsa.c's signature
+ * \param hash_id  SIG_RSA_RAW, SIG_RSA_MD{2,4,5} or SIG_RSA_SHA{1,224,256,384,512}
+ * \param hashlen  message digest length (for SIG_RSA_RAW only)
+ * \param hash     buffer holding the message digest
+ * \param sig      buffer that will hold the ciphertext
+ *
+ * \return         0 if the signing operation was successful,
+ *                 or an POLARSSL_ERR_RSA_XXX error code
+ *
+ * \note           The "sig" buffer must be as large as the size
+ *                 of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int pkcs11_sign( pkcs11_context *ctx,
+                    int mode,
+                    int hash_id,
+                    int hashlen,
+                    const unsigned char *hash,
+                    unsigned char *sig );
+
+#endif /* POLARSSL_PKCS11_C */
+
+#endif /* PKCS11_H_ */

include/polarssl/ssl.h

@@ -35,6 +35,11 @@
 #include "polarssl/md5.h"
 #include "polarssl/sha1.h"
 #include "polarssl/x509.h"
+#include "polarssl/config.h"
+
+#if defined(POLARSSL_PKCS11_C)
+#include "polarssl/pkcs11.h"
+#endif
 
 /*
  * SSL Error codes
@@ -268,6 +273,9 @@ struct _ssl_context
      * PKI layer
      */
     rsa_context *rsa_key;               /*!<  own RSA private key     */
+#if defined(POLARSSL_PKCS11_C)
+    pkcs11_context *pkcs11_key;         /*!<  own PKCS#11 RSA private key */
+#endif
     x509_cert *own_cert;                /*!<  own X.509 certificate   */
     x509_cert *ca_chain;                /*!<  own trusted CA chain    */
     x509_crl *ca_crl;                   /*!<  trusted CA CRLs         */
@@ -480,6 +488,18 @@ void ssl_set_ca_chain( ssl_context *ssl, x509_cert *ca_chain,
 void ssl_set_own_cert( ssl_context *ssl, x509_cert *own_cert,
                        rsa_context *rsa_key );
 
+#if defined(POLARSSL_PKCS11_C)
+/**
+ * \brief          Set own certificate and PKCS#11 private key
+ *
+ * \param ssl      SSL context
+ * \param own_cert own public certificate
+ * \param pkcs11_key    own PKCS#11 RSA key
+ */
+void ssl_set_own_cert_pkcs11( ssl_context *ssl, x509_cert *own_cert,
+                       pkcs11_context *pkcs11_key );
+#endif
+
 /**
  * \brief          Set the Diffie-Hellman public P and G values,
  *                 read as hexadecimal strings (server-side only)

library/Makefile

@@ -26,7 +26,8 @@ OBJS=	aes.o		arc4.o		base64.o	\
 	ssl_cli.o	ssl_srv.o	ssl_tls.o	\
 	timing.o	x509parse.o	xtea.o		\
 	camellia.o  version.o   md.o		\
-	md_wrap.o	cipher.o 	cipher_wrap.o
+	md_wrap.o	cipher.o 	cipher_wrap.o \
+	pkcs11.o
 	
 
 .SILENT:

library/pkcs11.c

@@ -0,0 +1,239 @@
+/**
+ * \file pkcs11.c
+ *
+ * \brief Wrapper for PKCS#11 library libpkcs11-helper
+ *
+ * \author Adriaan de Jong <dejong@fox-it.com>
+ *
+ *  Copyright (C) 2006-2010, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "polarssl/pkcs11.h"
+
+#if defined(POLARSSL_PKCS11_C)
+
+#include <stdlib.h>
+#include <string.h>
+
+int pkcs11_x509_cert_init( x509_cert *cert, pkcs11h_certificate_t pkcs11_cert )
+{
+    int ret = 1;
+    unsigned char *cert_blob = NULL;
+    size_t cert_blob_size = 0;
+
+    if( cert == NULL )
+    {
+        ret = 2;
+        goto cleanup;
+    }
+
+    if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, NULL, &cert_blob_size ) != CKR_OK )
+    {
+        ret = 3;
+        goto cleanup;
+    }
+
+    cert_blob = malloc( cert_blob_size );
+    if( NULL == cert_blob )
+    {
+        ret = 4;
+        goto cleanup;
+    }
+
+    if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, cert_blob, &cert_blob_size ) != CKR_OK )
+    {
+        ret = 5;
+        goto cleanup;
+    }
+
+    if( 0 != x509parse_crt(cert, cert_blob, cert_blob_size ) )
+    {
+        ret = 6;
+        goto cleanup;
+    }
+
+    ret = 0;
+
+cleanup:
+    if( NULL != cert_blob )
+        free( cert_blob );
+
+    return ret;
+}
+
+
+int pkcs11_priv_key_init( pkcs11_context *priv_key,
+        pkcs11h_certificate_t pkcs11_cert )
+{
+    int ret = 1;
+    x509_cert cert;
+
+    memset( &cert, 0, sizeof( cert ) );
+
+    if( priv_key == NULL )
+        goto cleanup;
+
+    if( 0 != pkcs11_x509_cert_init( &cert, pkcs11_cert ) )
+        goto cleanup;
+
+    priv_key->len = cert.rsa.len;
+    priv_key->pkcs11h_cert = pkcs11_cert;
+
+    ret = 0;
+
+cleanup:
+    x509_free( &cert );
+
+    return ret;
+}
+
+void pkcs11_priv_key_free( pkcs11_context *priv_key )
+{
+    if( NULL != priv_key )
+        pkcs11h_certificate_freeCertificate( priv_key->pkcs11h_cert );
+}
+
+int pkcs11_decrypt( pkcs11_context *ctx,
+                       int mode, int *olen,
+                       const unsigned char *input,
+                       unsigned char *output,
+                       int output_max_len )
+{
+    size_t input_len, output_len;
+
+    if( NULL == ctx )
+        return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+
+    if( RSA_PUBLIC == mode )
+        return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+
+    output_len = input_len = ctx->len;
+
+    if( input_len < 16 || input_len > output_max_len )
+        return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+
+    /* Determine size of output buffer */
+    if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
+            input_len, NULL, &output_len ) != CKR_OK )
+    {
+        return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+    }
+
+    if( output_len > output_max_len )
+        return( POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE );
+
+    if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
+            input_len, output, &output_len ) != CKR_OK )
+    {
+        return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+    }
+    *olen = output_len;
+    return( 0 );
+}
+
+int pkcs11_sign( pkcs11_context *ctx,
+                    int mode,
+                    int hash_id,
+                    int hashlen,
+                    const unsigned char *hash,
+                    unsigned char *sig )
+{
+    size_t olen, asn_len;
+    unsigned char *p = sig;
+
+    if( NULL == ctx )
+        return POLARSSL_ERR_RSA_BAD_INPUT_DATA;
+
+    if( RSA_PUBLIC == mode )
+        return POLARSSL_ERR_RSA_BAD_INPUT_DATA;
+
+    olen = ctx->len;
+
+    switch( hash_id )
+    {
+        case SIG_RSA_RAW:
+            asn_len = 0;
+            memcpy( p, hash, hashlen );
+            break;
+
+        case SIG_RSA_MD2:
+            asn_len = OID_SIZE(ASN1_HASH_MDX);
+            memcpy( p, ASN1_HASH_MDX, asn_len );
+            memcpy( p + asn_len, hash, hashlen );
+            p[13] = 2; break;
+
+        case SIG_RSA_MD4:
+            asn_len = OID_SIZE(ASN1_HASH_MDX);
+            memcpy( p, ASN1_HASH_MDX, asn_len );
+            memcpy( p + asn_len, hash, hashlen );
+            p[13] = 4; break;
+
+        case SIG_RSA_MD5:
+            asn_len = OID_SIZE(ASN1_HASH_MDX);
+            memcpy( p, ASN1_HASH_MDX, asn_len );
+            memcpy( p + asn_len, hash, hashlen );
+            p[13] = 5; break;
+
+        case SIG_RSA_SHA1:
+            asn_len = OID_SIZE(ASN1_HASH_SHA1);
+            memcpy( p, ASN1_HASH_SHA1, asn_len );
+            memcpy( p + 15, hash, hashlen );
+            break;
+
+        case SIG_RSA_SHA224:
+            asn_len = OID_SIZE(ASN1_HASH_SHA2X);
+            memcpy( p, ASN1_HASH_SHA2X, asn_len );
+            memcpy( p + asn_len, hash, hashlen );
+            p[1] += hashlen; p[14] = 4; p[18] += hashlen; break;
+
+        case SIG_RSA_SHA256:
+            asn_len = OID_SIZE(ASN1_HASH_SHA2X);
+            memcpy( p, ASN1_HASH_SHA2X, asn_len );
+            memcpy( p + asn_len, hash, hashlen );
+            p[1] += hashlen; p[14] = 1; p[18] += hashlen; break;
+
+        case SIG_RSA_SHA384:
+            asn_len = OID_SIZE(ASN1_HASH_SHA2X);
+            memcpy( p, ASN1_HASH_SHA2X, asn_len );
+            memcpy( p + asn_len, hash, hashlen );
+            p[1] += hashlen; p[14] = 2; p[18] += hashlen; break;
+
+        case SIG_RSA_SHA512:
+            asn_len = OID_SIZE(ASN1_HASH_SHA2X);
+            memcpy( p, ASN1_HASH_SHA2X, asn_len );
+            memcpy( p + asn_len, hash, hashlen );
+            p[1] += hashlen; p[14] = 3; p[18] += hashlen; break;
+
+        default:
+            return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+    }
+
+    if( pkcs11h_certificate_signAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, sig,
+            asn_len + hashlen, sig, &olen ) != CKR_OK )
+    {
+        return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+    }
+
+    return( 0 );
+}
+
+#endif /* defined(POLARSSL_PKCS11_C) */

library/ssl_cli.c

@@ -30,6 +30,10 @@
 #include "polarssl/debug.h"
 #include "polarssl/ssl.h"
 
+#if defined(POLARSSL_PKCS11_C)
+#include "polarssl/pkcs11.h"
+#endif /* defined(POLARSSL_PKCS11_C) */
+
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -635,8 +639,15 @@ static int ssl_write_certificate_verify( ssl_context *ssl )
 
     if( ssl->rsa_key == NULL )
     {
-        SSL_DEBUG_MSG( 1, ( "got no private key" ) );
+#if defined(POLARSSL_PKCS11_C)
-        return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED );
+        if( ssl->pkcs11_key == NULL )
+        {
+#endif /* defined(POLARSSL_PKCS11_C) */
+            SSL_DEBUG_MSG( 1, ( "got no private key" ) );
+            return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED );
+#if defined(POLARSSL_PKCS11_C)
+        }
+#endif /* defined(POLARSSL_PKCS11_C) */
     }
 
     /*
@@ -644,14 +655,30 @@ static int ssl_write_certificate_verify( ssl_context *ssl )
      */
     ssl_calc_verify( ssl, hash );
 
-    n = ssl->rsa_key->len;
+    if ( ssl->rsa_key )
+        n = ssl->rsa_key->len;
+#if defined(POLARSSL_PKCS11_C)
+    else
+        n = ssl->pkcs11_key->len;
+#endif  /* defined(POLARSSL_PKCS11_C) */
+
     ssl->out_msg[4] = (unsigned char)( n >> 8 );
     ssl->out_msg[5] = (unsigned char)( n      );
 
-    if( ( ret = rsa_pkcs1_sign( ssl->rsa_key, RSA_PRIVATE, SIG_RSA_RAW,
+    if( ssl->rsa_key )
-                                36, hash, ssl->out_msg + 6 ) ) != 0 )
     {
-        SSL_DEBUG_RET( 1, "rsa_pkcs1_sign", ret );
+        ret = rsa_pkcs1_sign( ssl->rsa_key, RSA_PRIVATE, SIG_RSA_RAW,
+                                    36, hash, ssl->out_msg + 6 );
+    } else {
+#if defined(POLARSSL_PKCS11_C)
+        ret = pkcs11_sign( ssl->pkcs11_key, RSA_PRIVATE, SIG_RSA_RAW,
+                                    36, hash, ssl->out_msg + 6 );
+#endif  /* defined(POLARSSL_PKCS11_C) */
+    }
+
+    if (ret != 0)
+    {
+        SSL_DEBUG_RET( 1, "pkcs1_sign", ret );
         return( ret );
     }
 

library/ssl_srv.c

@@ -30,6 +30,10 @@
 #include "polarssl/debug.h"
 #include "polarssl/ssl.h"
 
+#if defined(POLARSSL_PKCS11_C)
+#include "polarssl/pkcs11.h"
+#endif /* defined(POLARSSL_PKCS11_C) */
+
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -521,7 +525,7 @@ static int ssl_write_certificate_request( ssl_context *ssl )
 
 static int ssl_write_server_key_exchange( ssl_context *ssl )
 {
-    int ret, n;
+    int ret, n, rsa_key_len = 0;
     unsigned char hash[36];
     md5_context md5;
     sha1_context sha1;
@@ -543,6 +547,20 @@ static int ssl_write_server_key_exchange( ssl_context *ssl )
     SSL_DEBUG_MSG( 1, ( "support for dhm is not available" ) );
     return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE );
 #else
+
+    if( ssl->rsa_key == NULL )
+    {
+#if defined(POLARSSL_PKCS11_C)
+        if( ssl->pkcs11_key == NULL )
+        {
+#endif /* defined(POLARSSL_PKCS11_C) */
+            SSL_DEBUG_MSG( 1, ( "got no private key" ) );
+            return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED );
+#if defined(POLARSSL_PKCS11_C)
+        }
+#endif /* defined(POLARSSL_PKCS11_C) */
+    }
+
     /*
      * Ephemeral DH parameters:
      *
@@ -589,21 +607,37 @@ static int ssl_write_server_key_exchange( ssl_context *ssl )
 
     SSL_DEBUG_BUF( 3, "parameters hash", hash, 36 );
 
-    ssl->out_msg[4 + n] = (unsigned char)( ssl->rsa_key->len >> 8 );
+    if ( ssl->rsa_key )
-    ssl->out_msg[5 + n] = (unsigned char)( ssl->rsa_key->len      );
+        rsa_key_len = ssl->rsa_key->len;
+#if defined(POLARSSL_PKCS11_C)
+    else
+        rsa_key_len = ssl->pkcs11_key->len;
+#endif /* defined(POLARSSL_PKCS11_C) */
+
+    ssl->out_msg[4 + n] = (unsigned char)( rsa_key_len >> 8 );
+    ssl->out_msg[5 + n] = (unsigned char)( rsa_key_len      );
+
+    if ( ssl->rsa_key )
+    {
+        ret = rsa_pkcs1_sign( ssl->rsa_key, RSA_PRIVATE,
+                              SIG_RSA_RAW, 36, hash, ssl->out_msg + 6 + n );
+    }
+#if defined(POLARSSL_PKCS11_C)
+    else {
+        ret = pkcs11_sign( ssl->pkcs11_key, RSA_PRIVATE,
+                              SIG_RSA_RAW, 36, hash, ssl->out_msg + 6 + n );
+    }
+#endif  /* defined(POLARSSL_PKCS11_C) */
 
-    ret = rsa_pkcs1_sign( ssl->rsa_key, RSA_PRIVATE,
-                          SIG_RSA_RAW, 36, hash, ssl->out_msg + 6 + n );
     if( ret != 0 )
     {
-        SSL_DEBUG_RET( 1, "rsa_pkcs1_sign", ret );
+        SSL_DEBUG_RET( 1, "pkcs1_sign", ret );
         return( ret );
     }
 
-    SSL_DEBUG_BUF( 3, "my RSA sig", ssl->out_msg + 6 + n,
+    SSL_DEBUG_BUF( 3, "my RSA sig", ssl->out_msg + 6 + n, rsa_key_len );
-                                    ssl->rsa_key->len );
 
-    ssl->out_msglen  = 6 + n + ssl->rsa_key->len;
+    ssl->out_msglen  = 6 + n + rsa_key_len;
     ssl->out_msgtype = SSL_MSG_HANDSHAKE;
     ssl->out_msg[0]  = SSL_HS_SERVER_KEY_EXCHANGE;
 
@@ -713,11 +747,29 @@ static int ssl_parse_client_key_exchange( ssl_context *ssl )
     }
     else
     {
+        if( ssl->rsa_key == NULL )
+        {
+#if defined(POLARSSL_PKCS11_C)
+                if( ssl->pkcs11_key == NULL )
+                {
+#endif
+                    SSL_DEBUG_MSG( 1, ( "got no private key" ) );
+                    return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED );
+#if defined(POLARSSL_PKCS11_C)
+                }
+#endif
+        }
+
         /*
          * Decrypt the premaster using own private RSA key
          */
         i = 4;
-        n = ssl->rsa_key->len;
+        if( ssl->rsa_key )
+            n = ssl->rsa_key->len;
+#if defined(POLARSSL_PKCS11_C)
+        else
+            n = ssl->pkcs11_key->len;
+#endif
         ssl->pmslen = 48;
 
         if( ssl->minor_ver != SSL_MINOR_VERSION_0 )
@@ -737,9 +789,18 @@ static int ssl_parse_client_key_exchange( ssl_context *ssl )
             return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
         }
 
-        ret = rsa_pkcs1_decrypt( ssl->rsa_key, RSA_PRIVATE, &ssl->pmslen,
+        if( ssl->rsa_key ) {
+            ret = rsa_pkcs1_decrypt( ssl->rsa_key, RSA_PRIVATE, &ssl->pmslen,
                                  ssl->in_msg + i, ssl->premaster,
-				 sizeof(ssl->premaster) );
+                                 sizeof(ssl->premaster) );
+        }
+#if defined(POLARSSL_PKCS11_C)
+        else {
+            ret = pkcs11_decrypt( ssl->pkcs11_key, RSA_PRIVATE, &ssl->pmslen,
+                                 ssl->in_msg + i, ssl->premaster,
+                                 sizeof(ssl->premaster) );
+        }
+#endif  /* defined(POLARSSL_PKCS11_C) */
 
         if( ret != 0 || ssl->pmslen != 48 ||
             ssl->premaster[0] != ssl->max_major_ver ||

library/ssl_tls.c

@@ -1796,6 +1796,15 @@ void ssl_set_own_cert( ssl_context *ssl, x509_cert *own_cert,
     ssl->rsa_key    = rsa_key;
 }
 
+#if defined(POLARSSL_PKCS11_C)
+void ssl_set_own_cert_pkcs11( ssl_context *ssl, x509_cert *own_cert,
+                       pkcs11_context *pkcs11_key )
+{
+    ssl->own_cert   = own_cert;
+    ssl->pkcs11_key = pkcs11_key;
+}
+#endif
+
 int ssl_set_dh_param( ssl_context *ssl, const char *dhm_P, const char *dhm_G )
 {
     int ret;

programs/Makefile

@@ -1,6 +1,7 @@
 
 # To compile on SunOS: add "-lsocket -lnsl" to LDFLAGS
 # To compile on MinGW: add "-lws2_32" to LDFLAGS
+# To compile with PKCS11: add "-lpkcs11-helper" to LDFLAGS
 
 CFLAGS	= -I../include -D_FILE_OFFSET_BITS=64 -Wall -Wdeclaration-after-statement
 OFLAGS	= -O

tests/Makefile

@@ -1,6 +1,7 @@
 
 # To compile on SunOS: add "-lsocket -lnsl" to LDFLAGS
 # To compile on MinGW: add "-lws2_32" to LDFLAGS
+# To compile with PKCS11: add "-lpkcs11-helper" to LDFLAGS
 
 CFLAGS	= -I../include -D_FILE_OFFSET_BITS=64 -Wall -Wdeclaration-after-statement \
 			-Wno-unused-function -Wno-unused-value