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- Added reading of DHM context from memory and file

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This commit is contained in:
Paul Bakker 2011-01-06 15:48:19 +00:00
parent 8123e9d8f1
commit 1b57b06751
8 changed files with 201 additions and 2 deletions
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1
ChangeLog
View File

@ -8,6 +8,7 @@ Features
with OpenVPN (donated by Fox-IT)
* Added generic cipher wrapper for integration
with OpenVPN (donated by Fox-IT)
* Added reading of DHM context from memory and file
= Version 0.14.0 released on 2010-08-16
Features

1
include/polarssl/certs.h
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@ -38,6 +38,7 @@ extern const char test_srv_crt[];
extern const char test_srv_key[];
extern const char test_cli_crt[];
extern const char test_cli_key[];
extern const char test_dhm_params[];
#ifdef __cplusplus
}

2
include/polarssl/md.h
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@ -41,6 +41,8 @@ typedef enum {
POLARSSL_MD_SHA512,
} md_type_t;
#define POLARSSL_MD_MAX_SIZE 64 /* longest known is SHA512 */
/**
* Message digest information. Allows message digest functions to be called
* in a generic way.

11
include/polarssl/ssl.h
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@ -453,6 +453,17 @@ void ssl_set_own_cert( ssl_context *ssl, x509_cert *own_cert,
*/
int ssl_set_dh_param( ssl_context *ssl, const char *dhm_P, const char *dhm_G );
/**
* \brief Set the Diffie-Hellman public P and G values,
* read from existing context (server-side only)
*
* \param ssl SSL context
* \param dhm_ctx Diffie-Hellman-Merkle context
*
* \return 0 if successful
*/
int ssl_set_dh_param_ctx( ssl_context *ssl, dhm_context *dhm_ctx );
/**
* \brief Set hostname for ServerName TLS Extension
*

29
include/polarssl/x509.h
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@ -28,6 +28,7 @@
#define POLARSSL_X509_H
#include "polarssl/rsa.h"
#include "polarssl/dhm.h"
/**
* @addtogroup x509_module
@ -322,7 +323,7 @@ extern "C" {
#endif
/**
* @name Functions to read in a certificate, CRL or private RSA key
* @name Functions to read in DHM parameters, a certificate, CRL or private RSA key
* @{
*/
@ -404,7 +405,31 @@ int x509parse_key( rsa_context *rsa,
*/
int x509parse_keyfile( rsa_context *rsa, const char *path,
const char *password );
/** @} name Functions to read in a certificate, CRL or private RSA key */
/** @ingroup x509_module */
/**
* \brief Parse DHM parameters
*
* \param dhm DHM context to be initialized
* \param dhmin input buffer
* \param dhminlen size of the buffer
*
* \return 0 if successful, or a specific X509 error code
*/
int x509parse_dhm( dhm_context *dhm, const unsigned char *dhmin, int dhminlen );
/** @ingroup x509_module */
/**
* \brief Load and parse DHM parameters
*
* \param dhm DHM context to be initialized
* \param path filename to read the DHM Parameters from
*
* \return 0 if successful, or a specific X509 error code
*/
int x509parse_dhmfile( dhm_context *rsa, const char *path );
/** @} name Functions to read in DHM parameters, a certificate, CRL or private RSA key */

7
library/certs.c
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@ -186,4 +186,11 @@ const char test_cli_key[] =
"3vMGjy6jnBSaKoktW8ikY+4FHq+t5z63UN3RF367Iz0dWzIVocbxAQ==\r\n"
"-----END RSA PRIVATE KEY-----\r\n";
const char test_dhm_params[] =
"-----BEGIN DH PARAMETERS-----\r\n"
"MIGHAoGBAJ419DBEOgmQTzo5qXl5fQcN9TN455wkOL7052HzxxRVMyhYmwQcgJvh\r\n"
"1sa18fyfR9OiVEMYglOpkqVoGLN7qd5aQNNi5W7/C+VBdHTBJcGZJyyP5B3qcz32\r\n"
"9mLJKudlVudV0Qxk5qUJaPZ/xupz0NyoVpviuiBOI1gNi8ovSXWzAgEC\r\n"
"-----END DH PARAMETERS-----\r\n";
#endif

19
library/ssl_tls.c
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@ -1806,6 +1806,25 @@ int ssl_set_dh_param( ssl_context *ssl, const char *dhm_P, const char *dhm_G )
return( 0 );
}
int ssl_set_dh_param_ctx( ssl_context *ssl, dhm_context *dhm_ctx )
{
int ret;
if( ( ret = mpi_copy(&ssl->dhm_ctx.P, &dhm_ctx->P) ) != 0 )
{
SSL_DEBUG_RET( 1, "mpi_copy", ret );
return( ret );
}
if( ( ret = mpi_copy(&ssl->dhm_ctx.G, &dhm_ctx->G) ) != 0 )
{
SSL_DEBUG_RET( 1, "mpi_copy", ret );
return( ret );
}
return( 0 );
}
int ssl_set_hostname( ssl_context *ssl, const char *hostname )
{
if( hostname == NULL )

133
library/x509parse.c
View File

@ -47,6 +47,7 @@
#include "polarssl/sha1.h"
#include "polarssl/sha2.h"
#include "polarssl/sha4.h"
#include "polarssl/dhm.h"
#include <string.h>
#include <stdlib.h>
@ -1819,6 +1820,122 @@ int x509parse_keyfile( rsa_context *rsa, const char *path, const char *pwd )
return( ret );
}
/*
* Parse DHM parameters
*/
int x509parse_dhm( dhm_context *dhm, const unsigned char *dhmin, int dhminlen )
{
int ret, len;
unsigned char *buf, *s1, *s2;
unsigned char *p, *end;
s1 = (unsigned char *) strstr( (char *) dhmin,
"-----BEGIN DH PARAMETERS-----" );
if( s1 != NULL )
{
s2 = (unsigned char *) strstr( (char *) dhmin,
"-----END DH PARAMETERS-----" );
if( s2 == NULL || s2 <= s1 )
return( POLARSSL_ERR_X509_KEY_INVALID_PEM );
s1 += 29;
if( *s1 == '\r' ) s1++;
if( *s1 == '\n' ) s1++;
else return( POLARSSL_ERR_X509_KEY_INVALID_PEM );
len = 0;
ret = base64_decode( NULL, &len, s1, s2 - s1 );
if( ret == POLARSSL_ERR_BASE64_INVALID_CHARACTER )
return( ret | POLARSSL_ERR_X509_KEY_INVALID_PEM );
if( ( buf = (unsigned char *) malloc( len ) ) == NULL )
return( 1 );
if( ( ret = base64_decode( buf, &len, s1, s2 - s1 ) ) != 0 )
{
free( buf );
return( ret | POLARSSL_ERR_X509_KEY_INVALID_PEM );
}
dhminlen = len;
}
else
{
buf = NULL;
}
memset( dhm, 0, sizeof( dhm_context ) );
p = ( s1 != NULL ) ? buf : (unsigned char *) dhmin;
end = p + dhminlen;
/*
* DHParams ::= SEQUENCE {
* prime INTEGER, -- P
* generator INTEGER, -- g
* }
*/
if( ( ret = asn1_get_tag( &p, end, &len,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
{
if( s1 != NULL )
free( buf );
dhm_free( dhm );
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT | ret );
}
end = p + len;
if( ( ret = asn1_get_mpi( &p, end, &dhm->P ) ) != 0 ||
( ret = asn1_get_mpi( &p, end, &dhm->G ) ) != 0 )
{
if( s1 != NULL )
free( buf );
dhm_free( dhm );
return( ret | POLARSSL_ERR_X509_KEY_INVALID_FORMAT );
}
if( p != end )
{
if( s1 != NULL )
free( buf );
dhm_free( dhm );
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT |
POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
}
if( s1 != NULL )
free( buf );
return( 0 );
}
/*
* Load and parse a private RSA key
*/
int x509parse_dhmfile( dhm_context *dhm, const char *path )
{
int ret;
size_t n;
unsigned char *buf;
if ( load_file( path, &buf, &n ) )
return( 1 );
ret = x509parse_dhm( dhm, buf, (int) n);
memset( buf, 0, n + 1 );
free( buf );
return( ret );
}
#if defined _MSC_VER && !defined snprintf
#include <stdarg.h>
@ -2511,6 +2628,7 @@ int x509_self_test( int verbose )
x509_cert cacert;
x509_cert clicert;
rsa_context rsa;
dhm_context dhm;
if( verbose != 0 )
printf( " X.509 certificate load: " );
@ -2567,12 +2685,27 @@ int x509_self_test( int verbose )
return( ret );
}
if( verbose != 0 )
printf( "passed\n X.509 DHM parameter load: " );
i = strlen( test_dhm_params );
j = strlen( test_ca_pwd );
if( ( ret = x509parse_dhm( &dhm, (unsigned char *) test_dhm_params, i ) ) != 0 )
{
if( verbose != 0 )
printf( "failed\n" );
return( ret );
}
if( verbose != 0 )
printf( "passed\n\n" );
x509_free( &cacert );
x509_free( &clicert );
rsa_free( &rsa );
dhm_free( &dhm );
return( 0 );
#else