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- Added verification callback in certificate verification chain in order to allow external blacklisting

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This commit is contained in:
Paul Bakker 2011-01-13 17:54:59 +00:00
parent 1b57b06751
commit b63b0afc05
8 changed files with 104 additions and 38 deletions
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10
ChangeLog
View file

@ -2,13 +2,15 @@ PolarSSL ChangeLog
= Version Trunk
Features
* Added Doxygen source code documentation parts (donated
by Fox-IT)
Note: Most of these features have been donated by Fox-IT
* Added Doxygen source code documentation parts
* Added generic message digest wrapper for integration
with OpenVPN (donated by Fox-IT)
with OpenVPN
* Added generic cipher wrapper for integration
with OpenVPN (donated by Fox-IT)
with OpenVPN
* Added reading of DHM context from memory and file
* Added verification callback on certificate chain
verification to allow external blacklisting.
= Version 0.14.0 released on 2010-08-16
Features

21
include/polarssl/ssl.h
View file

@ -215,17 +215,19 @@ struct _ssl_context
int max_minor_ver; /*!< max. minor version from client */
/*
* Callbacks (RNG, debug, I/O)
* Callbacks (RNG, debug, I/O, verification)
*/
int (*f_rng)(void *);
void (*f_dbg)(void *, int, const char *);
int (*f_recv)(void *, unsigned char *, int);
int (*f_send)(void *, unsigned char *, int);
int (*f_vrfy)(void *, x509_cert *, int, int);
void *p_rng; /*!< context for the RNG function */
void *p_dbg; /*!< context for the debug function */
void *p_recv; /*!< context for reading operations */
void *p_send; /*!< context for writing operations */
void *p_vrfy; /*!< context for verification */
/*
* Session layer
@ -353,6 +355,23 @@ void ssl_set_endpoint( ssl_context *ssl, int endpoint );
*/
void ssl_set_authmode( ssl_context *ssl, int authmode );
/**
* \brief Set the verification callback (Optional).
*
* If set, the verification callback is called once for every
* certificate in the chain. The verification function has the
* following parameter: (void *parameter, x509_cert certificate,
* int certifcate_depth, int preverify_ok). It should
* return 0 on SUCCESS.
*
* \param ssl SSL context
* \param f_vrfy verification function
* \param p_vrfy verification parameter
*/
void ssl_set_verify( ssl_context *ssl,
int (*f_vrfy)(void *, x509_cert *, int, int),
void *p_vrfy );
/**
* \brief Set the random number generator callback
*

6
include/polarssl/x509.h
View file

@ -501,6 +501,8 @@ int x509parse_time_expired( const x509_time *time );
* \param cn expected Common Name (can be set to
* NULL if the CN must not be verified)
* \param flags result of the verification
* \param f_vrfy verification function
* \param p_vrfy verification parameter
*
* \return 0 if successful or POLARSSL_ERR_X509_SIG_VERIFY_FAILED,
* in which case *flags will have one or more of
@ -515,7 +517,9 @@ int x509parse_time_expired( const x509_time *time );
int x509parse_verify( x509_cert *crt,
x509_cert *trust_ca,
x509_crl *ca_crl,
const char *cn, int *flags );
const char *cn, int *flags,
int (*f_vrfy)(void *, x509_cert *, int, int),
void *p_vrfy );
/** @} name Functions to verify a certificate */

11
library/ssl_tls.c
View file

@ -1404,7 +1404,8 @@ int ssl_parse_certificate( ssl_context *ssl )
}
ret = x509parse_verify( ssl->peer_cert, ssl->ca_chain, ssl->ca_crl,
ssl->peer_cn, &ssl->verify_result );
ssl->peer_cn, &ssl->verify_result,
ssl->f_vrfy, ssl->p_vrfy );
if( ret != 0 )
SSL_DEBUG_RET( 1, "x509_verify_cert", ret );
@ -1725,6 +1726,14 @@ void ssl_set_authmode( ssl_context *ssl, int authmode )
ssl->authmode = authmode;
}
void ssl_set_verify( ssl_context *ssl,
int (*f_vrfy)(void *, x509_cert *, int, int),
void *p_vrfy )
{
ssl->f_vrfy = f_vrfy;
ssl->p_vrfy = p_vrfy;
}
void ssl_set_rng( ssl_context *ssl,
int (*f_rng)(void *),
void *p_rng )

23
library/x509parse.c
View file

@ -2335,7 +2335,9 @@ static void x509_hash( const unsigned char *in, int len, int alg,
int x509parse_verify( x509_cert *crt,
x509_cert *trust_ca,
x509_crl *ca_crl,
const char *cn, int *flags )
const char *cn, int *flags,
int (*f_vrfy)(void *, x509_cert *, int, int),
void *p_vrfy )
{
int cn_len;
int hash_id;
@ -2380,6 +2382,8 @@ int x509parse_verify( x509_cert *crt,
while( cur != NULL && cur->version != 0 )
{
int verify_ok = 1;
if( cur->ca_istrue == 0 ||
crt->issuer_raw.len != cur->subject_raw.len ||
memcmp( crt->issuer_raw.p, cur->subject_raw.p,
@ -2395,7 +2399,15 @@ int x509parse_verify( x509_cert *crt,
if( rsa_pkcs1_verify( &cur->rsa, RSA_PUBLIC, hash_id,
0, hash, crt->sig.p ) != 0 )
verify_ok = 0;
/* crt is verified to be a child of the parent cur, call verify callback */
if( NULL != f_vrfy ) {
if ( f_vrfy( p_vrfy, crt, pathlen-1, verify_ok ) != 0 )
return( POLARSSL_ERR_X509_CERT_VERIFY_FAILED );
} else if ( verify_ok == 0 ) {
return( POLARSSL_ERR_X509_CERT_VERIFY_FAILED );
}
pathlen++;
@ -2495,6 +2507,13 @@ int x509parse_verify( x509_cert *crt,
if( *flags != 0 )
return( POLARSSL_ERR_X509_CERT_VERIFY_FAILED );
/* Verification succeeded, call callback on top cert */
if( NULL != f_vrfy ) {
if ( f_vrfy(p_vrfy, crt, pathlen - 1, 1) != 0 )
return( POLARSSL_ERR_X509_CERT_VERIFY_FAILED );
}
return( 0 );
}
@ -2676,7 +2695,7 @@ int x509_self_test( int verbose )
if( verbose != 0 )
printf( "passed\n X.509 signature verify: ");
ret = x509parse_verify( &clicert, &cacert, NULL, "PolarSSL Client 2", &i );
ret = x509parse_verify( &clicert, &cacert, NULL, "PolarSSL Client 2", &i, NULL, NULL );
if( ret != 0 )
{
if( verbose != 0 )

2
programs/test/ssl_cert_test.c
View file

@ -146,7 +146,7 @@ int main( void )
printf( " . Verify the client certificate with CA certificate..." );
fflush( stdout );
ret = x509parse_verify( &clicert, &cacert, &crl, NULL, &flags );
ret = x509parse_verify( &clicert, &cacert, &crl, NULL, &flags, NULL, NULL );
if( ret != 0 )
{
if( ret == POLARSSL_ERR_X509_CERT_VERIFY_FAILED )

43
tests/suites/test_suite_x509parse.data
View file

@ -101,66 +101,73 @@ X509 Time Expired #6
x509_time_expired:"data_files/test-ca.crt":valid_to:0
X509 Certificate verification #1 (Revoked Cert, Expired CRL)
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":NULL:BADCERT_REVOKED | BADCRL_EXPIRED
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":NULL:POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_REVOKED | BADCRL_EXPIRED:NULL
X509 Certificate verification #2 (Revoked Cert, Expired CRL)
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"PolarSSL Server 1":BADCERT_REVOKED | BADCRL_EXPIRED
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"PolarSSL Server 1":POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_REVOKED | BADCRL_EXPIRED:NULL
X509 Certificate verification #3 (Revoked Cert, Expired CRL, CN Mismatch)
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"PolarSSL Wrong CN":BADCERT_REVOKED | BADCRL_EXPIRED | BADCERT_CN_MISMATCH
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"PolarSSL Wrong CN":POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_REVOKED | BADCRL_EXPIRED | BADCERT_CN_MISMATCH:NULL
X509 Certificate verification #4 (Valid Cert, Expired CRL)
x509_verify:"data_files/server2.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":NULL:BADCRL_EXPIRED
x509_verify:"data_files/server2.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":NULL:POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCRL_EXPIRED:NULL
X509 Certificate verification #5 (Revoked Cert)
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:BADCERT_REVOKED
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_REVOKED:NULL
X509 Certificate verification #6 (Revoked Cert)
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"PolarSSL Server 1":BADCERT_REVOKED
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"PolarSSL Server 1":POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_REVOKED:NULL
X509 Certificate verification #7 (Revoked Cert, CN Mismatch)
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"PolarSSL Wrong CN":BADCERT_REVOKED | BADCERT_CN_MISMATCH
x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"PolarSSL Wrong CN":POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_REVOKED | BADCERT_CN_MISMATCH:NULL
X509 Certificate verification #8 (Valid Cert)
x509_verify:"data_files/server2.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0
x509_verify:"data_files/server2.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0:0:NULL
X509 Certificate verification #9 (Not trusted Cert)
x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl.pem":NULL:BADCERT_NOT_TRUSTED
x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl.pem":NULL:POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_NOT_TRUSTED:NULL
X509 Certificate verification #10 (Not trusted Cert, Expired CRL)
x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl_expired.pem":NULL:BADCERT_NOT_TRUSTED
x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl_expired.pem":NULL:POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_NOT_TRUSTED:NULL
X509 Certificate verification #11 (Valid Cert MD2 Digest)
depends_on:POLARSSL_MD2_C
x509_verify:"data_files/cert_md2.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0
x509_verify:"data_files/cert_md2.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0:0:NULL
X509 Certificate verification #12 (Valid Cert MD4 Digest)
depends_on:POLARSSL_MD4_C
x509_verify:"data_files/cert_md4.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0
x509_verify:"data_files/cert_md4.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0:0:NULL
X509 Certificate verification #13 (Valid Cert MD5 Digest)
depends_on:POLARSSL_MD5_C
x509_verify:"data_files/cert_md5.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0
x509_verify:"data_files/cert_md5.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0:0:NULL
X509 Certificate verification #14 (Valid Cert SHA1 Digest)
depends_on:POLARSSL_SHA1_C
x509_verify:"data_files/cert_sha1.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0
x509_verify:"data_files/cert_sha1.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0:0:NULL
X509 Certificate verification #15 (Valid Cert SHA224 Digest)
depends_on:POLARSSL_SHA2_C
x509_verify:"data_files/cert_sha224.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0
x509_verify:"data_files/cert_sha224.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0:0:NULL
X509 Certificate verification #16 (Valid Cert SHA256 Digest)
depends_on:POLARSSL_SHA2_C
x509_verify:"data_files/cert_sha256.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0
x509_verify:"data_files/cert_sha256.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0:0:NULL
X509 Certificate verification #17 (Valid Cert SHA384 Digest)
depends_on:POLARSSL_SHA4_C
x509_verify:"data_files/cert_sha384.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0
x509_verify:"data_files/cert_sha384.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0:0:NULL
X509 Certificate verification #18 (Valid Cert SHA512 Digest)
depends_on:POLARSSL_SHA4_C
x509_verify:"data_files/cert_sha512.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0
x509_verify:"data_files/cert_sha512.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:0:0:NULL
X509 Certificate verification #19 (Valid Cert, denying callback)
depends_on:POLARSSL_SHA4_C
x509_verify:"data_files/cert_sha512.crt":"data_files/test-ca.crt":"data_files/crl.pem":NULL:POLARSSL_ERR_X509_CERT_VERIFY_FAILED:0:&verify_none
X509 Certificate verification #20 (Not trusted Cert, allowing callback)
x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl_expired.pem":NULL:POLARSSL_ERR_X509_CERT_VERIFY_FAILED:BADCERT_NOT_TRUSTED:&verify_all
X509 Parse Selftest
depends_on:POLARSSL_MD5_C

24
tests/suites/test_suite_x509parse.function
View file

@ -1,5 +1,17 @@
BEGIN_HEADER
#include <polarssl/config.h>
#include <polarssl/x509.h>
int verify_none( void *data, x509_cert *crt, int certificate_depth, int preverify_ok )
{
return 1;
}
int verify_all( void *data, x509_cert *crt, int certificate_depth, int preverify_ok )
{
return 0;
}
END_HEADER
BEGIN_CASE
@ -43,7 +55,7 @@ x509_crl_info:crl_file:result_str
END_CASE
BEGIN_CASE
x509_verify:crt_file:ca_file:crl_file:cn_name:result
x509_verify:crt_file:ca_file:crl_file:cn_name:result:flags:verify_callback
{
x509_cert crt;
x509_cert ca;
@ -59,16 +71,10 @@ x509_verify:crt_file:ca_file:crl_file:cn_name:result
TEST_ASSERT( x509parse_crtfile( &ca, {ca_file} ) == 0 );
TEST_ASSERT( x509parse_crlfile( &crl, {crl_file} ) == 0 );
res = x509parse_verify( &crt, &ca, &crl, {cn_name}, &flags );
res = x509parse_verify( &crt, &ca, &crl, {cn_name}, &flags, {verify_callback}, NULL );
if( res == 0 )
{
TEST_ASSERT( res == ( {result} ) );
}
else
{
TEST_ASSERT( flags == ( {result} ) );
}
TEST_ASSERT( flags == ( {flags} ) );
}
END_CASE