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Adapt asn1_write_algorithm_identifier() to params

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Manuel Pégourié-Gonnard 2013-09-12 02:17:54 +02:00 committed by Paul Bakker
parent 3837daec9e
commit edda9041fc
5 changed files with 41 additions and 36 deletions
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6
include/polarssl/asn1write.h
View file

@ -115,17 +115,19 @@ int asn1_write_oid( unsigned char **p, unsigned char *start,
/**
* \brief Write an AlgorithmIdentifier sequence in ASN.1 format
* Note: function works backwards in data buffer
* Note: Uses NULL as algorithm parameter
*
* \param p reference to current position pointer
* \param start start of the buffer (for bounds-checking)
* \param oid the OID of the algorithm
* \param oid_len length of the OID
* \param par_len length of parameters, which must be already written.
* If 0, NULL parameters are added
*
* \return the length written or a negative error code
*/
int asn1_write_algorithm_identifier( unsigned char **p, unsigned char *start,
const char *oid, size_t oid_len );
const char *oid, size_t oid_len,
size_t par_len );
/**
* \brief Write a boolean tag (ASN1_BOOLEAN) and value in ASN.1 format

12
include/polarssl/oid.h
View file

@ -370,6 +370,18 @@ int oid_get_attr_short_name( const asn1_buf *oid, const char **short_name );
*/
int oid_get_pk_alg( const asn1_buf *oid, pk_type_t *pk_alg );
/**
* \brief Translate pk_type into PublicKeyAlgorithm OID
*
* \param pk_alg Public key type to look for
* \param oid place to store ASN.1 OID string pointer
* \param olen length of the OID
*
* \return 0 if successful, or POLARSSL_ERR_OID_NOT_FOUND
*/
int oid_get_oid_by_pk_alg( pk_type_t pk_alg,
const char **oid, size_t *olen );
#if defined(POLARSSL_ECP_C)
/**
* \brief Translate NamedCurve OID into an EC group identifier

10
library/asn1write.c
View file

@ -158,17 +158,17 @@ int asn1_write_oid( unsigned char **p, unsigned char *start,
}
int asn1_write_algorithm_identifier( unsigned char **p, unsigned char *start,
const char *oid, size_t oid_len )
const char *oid, size_t oid_len,
size_t par_len )
{
int ret;
size_t len = 0;
// Write NULL
//
if( par_len == 0 )
ASN1_CHK_ADD( len, asn1_write_null( p, start ) );
else
len += par_len;
// Write OID
//
ASN1_CHK_ADD( len, asn1_write_oid( p, start, oid, oid_len ) );
ASN1_CHK_ADD( len, asn1_write_len( p, start, len ) );

1
library/oid.c
View file

@ -368,6 +368,7 @@ static const oid_pk_alg_t oid_pk_alg[] =
FN_OID_TYPED_FROM_ASN1(oid_pk_alg_t, pk_alg, oid_pk_alg);
FN_OID_GET_ATTR1(oid_get_pk_alg, oid_pk_alg_t, pk_alg, pk_type_t, pk_alg);
FN_OID_GET_OID_BY_ATTR1(oid_get_oid_by_pk_alg, oid_pk_alg_t, oid_pk_alg, pk_type_t, pk_alg);
#if defined(POLARSSL_ECP_C)
/*

40
library/x509write.c
View file

@ -172,7 +172,7 @@ static int x509_write_ec_pubkey( unsigned char **p, unsigned char *start,
* namedCurve OBJECT IDENTIFIER
* }
*/
static int x509_write_ec_algparam( unsigned char **p, unsigned char *start,
static int x509_write_ec_param( unsigned char **p, unsigned char *start,
ecp_keypair *ec )
{
int ret;
@ -489,7 +489,8 @@ int x509write_pubkey_der( pk_context *key, unsigned char *buf, size_t size )
{
int ret;
unsigned char *c;
size_t len = 0;
size_t len = 0, par_len = 0, oid_len;
const char *oid;
c = buf + size;
@ -519,32 +520,21 @@ int x509write_pubkey_der( pk_context *key, unsigned char *buf, size_t size )
ASN1_CHK_ADD( len, asn1_write_len( &c, buf, len ) );
ASN1_CHK_ADD( len, asn1_write_tag( &c, buf, ASN1_BIT_STRING ) );
#if defined(POLARSSL_RSA_C)
if( pk_get_type( key ) == POLARSSL_PK_RSA )
ASN1_CHK_ADD( len, asn1_write_algorithm_identifier( &c, buf,
OID_PKCS1_RSA, OID_SIZE( OID_PKCS1_RSA ) ) );
else
#endif
if( ( ret = oid_get_oid_by_pk_alg( pk_get_type( key ),
&oid, &oid_len ) ) != 0 )
{
return( ret );
}
#if defined(POLARSSL_ECP_C)
if( pk_get_type( key ) == POLARSSL_PK_ECKEY )
{
size_t alg_len = 0;
ASN1_CHK_ADD( alg_len, x509_write_ec_algparam( &c, buf,
pk_ec( *key ) ) );
ASN1_CHK_ADD( alg_len, asn1_write_oid( &c, buf,
OID_EC_ALG_UNRESTRICTED, OID_SIZE( OID_EC_ALG_UNRESTRICTED ) ) );
ASN1_CHK_ADD( alg_len, asn1_write_len( &c, buf, alg_len ) );
ASN1_CHK_ADD( alg_len, asn1_write_tag( &c, buf,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
len += alg_len;
ASN1_CHK_ADD( par_len, x509_write_ec_param( &c, buf, pk_ec( *key ) ) );
}
else
#endif
return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE );
ASN1_CHK_ADD( len, asn1_write_algorithm_identifier( &c, buf, oid, oid_len,
par_len ) );
ASN1_CHK_ADD( len, asn1_write_len( &c, buf, len ) );
ASN1_CHK_ADD( len, asn1_write_tag( &c, buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
@ -689,7 +679,7 @@ static int x509_write_sig( unsigned char **p, unsigned char *start,
// Write OID
//
ASN1_CHK_ADD( len, asn1_write_algorithm_identifier( p, start, oid,
oid_len ) );
oid_len, 0 ) );
return( len );
}
@ -937,7 +927,7 @@ int x509write_crt_der( x509write_cert *ctx, unsigned char *buf, size_t size )
* Signature ::= AlgorithmIdentifier
*/
ASN1_CHK_ADD( len, asn1_write_algorithm_identifier( &c, tmp_buf,
sig_oid, strlen( sig_oid ) ) );
sig_oid, strlen( sig_oid ), 0 ) );
/*
* Serial ::= INTEGER