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Added support for Netscape Certificate Types in CSR writing

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Further generalization of extension adding / replacing in the CSR
structure
This commit is contained in:
Paul Bakker 2013-08-26 13:41:01 +02:00
parent e5eae76bf0
commit 1c0e550e21
2 changed files with 95 additions and 17 deletions
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28
include/polarssl/x509write.h
View file

@ -130,12 +130,38 @@ void x509write_csr_set_md_alg( x509_csr *ctx, md_type_t md_alg );
* (e.g. KU_DIGITAL_SIGNATURE | KU_KEY_CERT_SIGN)
*
* \param ctx CSR context to use
* \param key_usage key usage bitstring to set
* \param key_usage key usage flags to set
*
* \return 0 if successful, or POLARSSL_ERR_X509WRITE_MALLOC_FAILED
*/
int x509write_csr_set_key_usage( x509_csr *ctx, unsigned char key_usage );
/**
* \brief Set the Netscape Cert Type flags
* (e.g. NS_CERT_TYPE_SSL_CLIENT | NS_CERT_TYPE_EMAIL)
*
* \param ctx CSR context to use
* \param ns_cert_type Netscape Cert Type flags to set
*
* \return 0 if successful, or POLARSSL_ERR_X509WRITE_MALLOC_FAILED
*/
int x509write_csr_set_ns_cert_type( x509_csr *ctx, unsigned char ns_cert_type );
/**
* \brief Generic function to add to or replace an extension in the CSR
*
* \param ctx CSR context to use
* \param oid OID of the extension
* \param oid_len length of the OID
* \param val value of the extension OCTET STRING
* \param val_len length of the value data
*
* \return 0 if successful, or a POLARSSL_ERR_X509WRITE_MALLOC_FAILED
*/
int x509write_csr_set_extension( x509_csr *ctx,
const char *oid, size_t oid_len,
const unsigned char *val, size_t val_len );
/**
* \brief Free the contents of a CSR context
*

84
library/x509write.c
View file

@ -156,14 +156,14 @@ exit:
return( ret );
}
int x509write_csr_set_key_usage( x509_csr *ctx, unsigned char key_usage )
int x509write_csr_set_extension( x509_csr *ctx,
const char *oid, size_t oid_len,
const unsigned char *val, size_t val_len )
{
asn1_named_data *cur;
unsigned char *c;
int len;
if( ( cur = asn1_find_named_data( ctx->extensions, OID_KEY_USAGE,
OID_SIZE( OID_KEY_USAGE ) ) ) == NULL )
if( ( cur = asn1_find_named_data( ctx->extensions, oid,
oid_len ) ) == NULL )
{
cur = polarssl_malloc( sizeof(asn1_named_data) );
if( cur == NULL )
@ -171,32 +171,84 @@ int x509write_csr_set_key_usage( x509_csr *ctx, unsigned char key_usage )
memset( cur, 0, sizeof(asn1_named_data) );
cur->oid.len = OID_SIZE( OID_KEY_USAGE );
cur->oid.p = polarssl_malloc( cur->oid.len );
cur->oid.len = oid_len;
cur->oid.p = polarssl_malloc( oid_len );
if( cur->oid.p == NULL )
{
free( cur );
polarssl_free( cur );
return( POLARSSL_ERR_X509WRITE_MALLOC_FAILED );
}
cur->val.len = 4;
cur->val.p = polarssl_malloc( cur->val.len );
cur->val.len = val_len;
cur->val.p = polarssl_malloc( val_len );
if( cur->val.p == NULL )
{
free( cur->oid.p );
free( cur );
polarssl_free( cur->oid.p );
polarssl_free( cur );
return( POLARSSL_ERR_X509WRITE_MALLOC_FAILED );
}
memcpy( cur->oid.p, OID_KEY_USAGE, OID_SIZE( OID_KEY_USAGE ) );
memcpy( cur->oid.p, oid, oid_len );
cur->next = ctx->extensions;
ctx->extensions = cur;
}
c = cur->val.p + cur->val.len;
if( ( len = asn1_write_bitstring( &c, cur->val.p, &key_usage, 6 ) ) < 0 )
exit(1);
if( cur->val.len != val_len )
{
polarssl_free( cur->val.p );
cur->val.len = val_len;
cur->val.p = polarssl_malloc( val_len );
if( cur->val.p == NULL )
{
polarssl_free( cur->oid.p );
polarssl_free( cur );
return( POLARSSL_ERR_X509WRITE_MALLOC_FAILED );
}
}
memcpy( cur->val.p, val, val_len );
return( 0 );
}
int x509write_csr_set_key_usage( x509_csr *ctx, unsigned char key_usage )
{
unsigned char buf[4];
unsigned char *c;
int ret;
c = buf + 4;
if( ( ret = asn1_write_bitstring( &c, buf, &key_usage, 6 ) ) != 4 )
return( ret );
ret = x509write_csr_set_extension( ctx, OID_KEY_USAGE,
OID_SIZE( OID_KEY_USAGE ),
buf, 4 );
if( ret != 0 )
return( ret );
return( 0 );
}
int x509write_csr_set_ns_cert_type( x509_csr *ctx, unsigned char ns_cert_type )
{
unsigned char buf[4];
unsigned char *c;
int ret;
c = buf + 4;
if( ( ret = asn1_write_bitstring( &c, buf, &ns_cert_type, 8 ) ) != 4 )
return( ret );
ret = x509write_csr_set_extension( ctx, OID_NS_CERT_TYPE,
OID_SIZE( OID_NS_CERT_TYPE ),
buf, 4 );
if( ret != 0 )
return( ret );
return( 0 );
}