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Split x509_crl_parse_der() out of x509_crl_parse()

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Manuel Pégourié-Gonnard 2014-11-19 16:58:28 +01:00
parent 57a5d60abb
commit 426d4ae7ff
3 changed files with 86 additions and 76 deletions
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1
ChangeLog
View File

@ -15,6 +15,7 @@ Security
Features
* Add function pk_check_pair() to test if public and private keys match.
* Add x509_crl_parse_der().
Bugfix
* User set CFLAGS were ignore by Cmake with gcc (introduced in 1.3.9, found

25
include/polarssl/x509_crl.h
View File

@ -100,11 +100,23 @@ typedef struct _x509_crl
x509_crl;
/**
* \brief Parse one or more CRLs and add them
* to the chained list
* \brief Parse a DER-encoded CRL and append it to the chained list
*
* \param chain points to the start of the chain
* \param buf buffer holding the CRL data
* \param buf buffer holding the CRL data in DER format
* \param buflen size of the buffer
*
* \return 0 if successful, or a specific X509 or PEM error code
*/
int x509_crl_parse_der( x509_crl *chain,
const unsigned char *buf, size_t buflen );
/**
* \brief Parse one or more CRLs and append them to the chained list
*
* \note Mutliple CRLs are accepted only if using PEM format
*
* \param chain points to the start of the chain
* \param buf buffer holding the CRL data in PEM or DER format
* \param buflen size of the buffer
*
* \return 0 if successful, or a specific X509 or PEM error code
@ -113,11 +125,12 @@ int x509_crl_parse( x509_crl *chain, const unsigned char *buf, size_t buflen );
#if defined(POLARSSL_FS_IO)
/**
* \brief Load one or more CRLs and add them
* to the chained list
* \brief Load one or more CRLs and append them to the chained list
*
* \note Mutliple CRLs are accepted only if using PEM format
*
* \param chain points to the start of the chain
* \param path filename to read the CRLs from
* \param path filename to read the CRLs from (in PEM or DER encoding)
*
* \return 0 if successful, or a specific X509 or PEM error code
*/

136
library/x509_crl.c
View File

@ -252,25 +252,16 @@ static int x509_get_entries( unsigned char **p,
}
/*
* Parse one or more CRLs and add them to the chained list
* Parse one CRLs in DER format and append it to the chained list
*/
int x509_crl_parse( x509_crl *chain, const unsigned char *buf, size_t buflen )
int x509_crl_parse_der( x509_crl *chain,
const unsigned char *buf, size_t buflen )
{
int ret;
size_t len;
unsigned char *p, *end;
x509_crl *crl;
x509_buf sig_params1, sig_params2;
#if defined(POLARSSL_PEM_PARSE_C)
size_t use_len;
pem_context pem;
#endif
memset( &sig_params1, 0, sizeof( x509_buf ) );
memset( &sig_params2, 0, sizeof( x509_buf ) );
crl = chain;
x509_crl *crl = chain;
/*
* Check for valid input
@ -278,12 +269,15 @@ int x509_crl_parse( x509_crl *chain, const unsigned char *buf, size_t buflen )
if( crl == NULL || buf == NULL )
return( POLARSSL_ERR_X509_BAD_INPUT_DATA );
while( crl->version != 0 && crl->next != NULL )
crl = crl->next;
memset( &sig_params1, 0, sizeof( x509_buf ) );
memset( &sig_params2, 0, sizeof( x509_buf ) );
/*
* Add new CRL on the end of the chain if needed.
*/
while( crl->version != 0 && crl->next != NULL )
crl = crl->next;
if( crl->version != 0 && crl->next == NULL )
{
crl->next = (x509_crl *) polarssl_malloc( sizeof( x509_crl ) );
@ -298,53 +292,18 @@ int x509_crl_parse( x509_crl *chain, const unsigned char *buf, size_t buflen )
crl = crl->next;
}
#if defined(POLARSSL_PEM_PARSE_C)
pem_init( &pem );
ret = pem_read_buffer( &pem,
"-----BEGIN X509 CRL-----",
"-----END X509 CRL-----",
buf, NULL, 0, &use_len );
/*
* Copy raw DER-encoded CRL
*/
if( ( p = polarssl_malloc( buflen ) ) == NULL )
return( POLARSSL_ERR_X509_MALLOC_FAILED );
if( ret == 0 )
{
/*
* Was PEM encoded
*/
buflen -= use_len;
buf += use_len;
/*
* Steal PEM buffer
*/
p = pem.buf;
pem.buf = NULL;
len = pem.buflen;
pem_free( &pem );
}
else if( ret != POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
{
pem_free( &pem );
return( ret );
}
else
#endif /* POLARSSL_PEM_PARSE_C */
{
/*
* nope, copy the raw DER data
*/
p = (unsigned char *) polarssl_malloc( len = buflen );
if( p == NULL )
return( POLARSSL_ERR_X509_MALLOC_FAILED );
memcpy( p, buf, buflen );
buflen = 0;
}
memcpy( p, buf, buflen );
crl->raw.p = p;
crl->raw.len = len;
end = p + len;
crl->raw.len = buflen;
end = p + buflen;
/*
* CertificateList ::= SEQUENCE {
@ -522,21 +481,58 @@ int x509_crl_parse( x509_crl *chain, const unsigned char *buf, size_t buflen )
POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
}
if( buflen > 0 )
return( 0 );
}
/*
* Parse one or more CRLs and add them to the chained list
*/
int x509_crl_parse( x509_crl *chain, const unsigned char *buf, size_t buflen )
{
int ret;
if( chain == NULL || buf == NULL )
return( POLARSSL_ERR_X509_BAD_INPUT_DATA );
#if defined(POLARSSL_PEM_PARSE_C)
size_t use_len;
pem_context pem;
pem_init( &pem );
ret = pem_read_buffer( &pem,
"-----BEGIN X509 CRL-----",
"-----END X509 CRL-----",
buf, NULL, 0, &use_len );
if( ret == 0 )
{
crl->next = (x509_crl *) polarssl_malloc( sizeof( x509_crl ) );
/*
* Was PEM encoded
*/
buflen -= use_len;
buf += use_len;
if( crl->next == NULL )
{
x509_crl_free( crl );
return( POLARSSL_ERR_X509_MALLOC_FAILED );
}
if( ( ret = x509_crl_parse_der( chain, pem.buf, pem.buflen ) ) != 0 )
return( ret );
x509_crl_init( crl->next );
crl = crl->next;
return( x509_crl_parse( crl, buf, buflen ) );
pem_free( &pem );
}
else if( ret != POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
{
pem_free( &pem );
return( ret );
}
else
#endif /* POLARSSL_PEM_PARSE_C */
{
if( ( ret = x509_crl_parse_der( chain, buf, buflen ) ) != 0 )
return( ret );
buflen = 0;
}
if( buflen > 0 )
return( x509_crl_parse( chain, buf, buflen ) );
return( 0 );
}