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Use PK internally for x509write_crt

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Manuel Pégourié-Gonnard 2013-09-12 05:39:46 +02:00 committed by Paul Bakker
parent f38e71afd5
commit 53c642504e
2 changed files with 43 additions and 22 deletions
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4
include/polarssl/x509write.h
View file

@ -86,8 +86,8 @@ typedef struct _x509write_cert
{ {
int version; int version;
mpi serial; mpi serial;
rsa_context *subject_key; pk_context *subject_key;
rsa_context *issuer_key; pk_context *issuer_key;
asn1_named_data *subject; asn1_named_data *subject;
asn1_named_data *issuer; asn1_named_data *issuer;
md_type_t md_alg; md_type_t md_alg;

61
library/x509write.c
View file

@ -314,12 +314,12 @@ void x509write_crt_set_md_alg( x509write_cert *ctx, md_type_t md_alg )
void x509write_crt_set_subject_key( x509write_cert *ctx, pk_context *key ) void x509write_crt_set_subject_key( x509write_cert *ctx, pk_context *key )
{ {
ctx->subject_key = pk_rsa( *key ); ctx->subject_key = key;
} }
void x509write_crt_set_issuer_key( x509write_cert *ctx, pk_context *key ) void x509write_crt_set_issuer_key( x509write_cert *ctx, pk_context *key )
{ {
ctx->issuer_key = pk_rsa( *key ); ctx->issuer_key = key;
} }
int x509write_crt_set_subject_name( x509write_cert *ctx, char *subject_name ) int x509write_crt_set_subject_name( x509write_cert *ctx, char *subject_name )
@ -404,8 +404,12 @@ int x509write_crt_set_subject_key_identifier( x509write_cert *ctx )
unsigned char *c = buf + sizeof(buf); unsigned char *c = buf + sizeof(buf);
size_t len = 0; size_t len = 0;
if( pk_get_type( ctx->subject_key ) != POLARSSL_PK_RSA )
return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE );
memset( buf, 0, sizeof(buf)); memset( buf, 0, sizeof(buf));
ASN1_CHK_ADD( len, x509_write_rsa_pubkey( &c, buf, ctx->subject_key ) ); ASN1_CHK_ADD( len, x509_write_rsa_pubkey( &c, buf,
pk_rsa( *ctx->subject_key ) ) );
sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 ); sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 );
c = buf + sizeof(buf) - 20; c = buf + sizeof(buf) - 20;
@ -426,8 +430,12 @@ int x509write_crt_set_authority_key_identifier( x509write_cert *ctx )
unsigned char *c = buf + sizeof(buf); unsigned char *c = buf + sizeof(buf);
size_t len = 0; size_t len = 0;
if( pk_get_type( ctx->issuer_key ) != POLARSSL_PK_RSA )
return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE );
memset( buf, 0, sizeof(buf)); memset( buf, 0, sizeof(buf));
ASN1_CHK_ADD( len, x509_write_rsa_pubkey( &c, buf, ctx->issuer_key ) ); ASN1_CHK_ADD( len, x509_write_rsa_pubkey( &c, buf,
pk_rsa( *ctx->issuer_key ) ) );
sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 ); sha1( buf + sizeof(buf) - len, len, buf + sizeof(buf) - 20 );
c = buf + sizeof(buf) - 20; c = buf + sizeof(buf) - 20;
@ -906,22 +914,25 @@ int x509write_crt_der( x509write_cert *ctx, unsigned char *buf, size_t size )
unsigned char hash[64]; unsigned char hash[64];
unsigned char sig[POLARSSL_MPI_MAX_SIZE]; unsigned char sig[POLARSSL_MPI_MAX_SIZE];
unsigned char tmp_buf[2048]; unsigned char tmp_buf[2048];
size_t sub_len = 0, pub_len = 0, sig_len = 0; size_t sub_len = 0, pub_len = 0, sig_and_oid_len = 0, sig_len;
size_t len = 0; size_t len = 0;
pk_type_t pk_alg;
// temporary compatibility hack /*
pk_context subject_key; * Prepare data to be signed in tmp_buf
subject_key.pk_info = pk_info_from_type( POLARSSL_PK_RSA ); */
subject_key.pk_ctx = ctx->subject_key;
c = tmp_buf + sizeof( tmp_buf ); c = tmp_buf + sizeof( tmp_buf );
// Generate correct OID /* Signature algorithm needed in TBS, and later for actual signature */
// pk_alg = pk_get_type( ctx->issuer_key );
ret = oid_get_oid_by_sig_alg( POLARSSL_PK_RSA, ctx->md_alg, &sig_oid, if( pk_alg == POLARSSL_PK_ECKEY )
&sig_oid_len ); pk_alg = POLARSSL_PK_ECDSA;
if( ret != 0 )
if( ( ret = oid_get_oid_by_sig_alg( pk_alg, ctx->md_alg,
&sig_oid, &sig_oid_len ) ) != 0 )
{
return( ret ); return( ret );
}
/* /*
* Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension * Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension
@ -935,7 +946,7 @@ int x509write_crt_der( x509write_cert *ctx, unsigned char *buf, size_t size )
/* /*
* SubjectPublicKeyInfo * SubjectPublicKeyInfo
*/ */
ASN1_CHK_ADD( pub_len, x509write_pubkey_der( &subject_key, ASN1_CHK_ADD( pub_len, x509write_pubkey_der( ctx->subject_key,
tmp_buf, c - tmp_buf ) ); tmp_buf, c - tmp_buf ) );
c -= pub_len; c -= pub_len;
len += pub_len; len += pub_len;
@ -990,18 +1001,28 @@ int x509write_crt_der( x509write_cert *ctx, unsigned char *buf, size_t size )
ASN1_CHK_ADD( len, asn1_write_len( &c, tmp_buf, len ) ); ASN1_CHK_ADD( len, asn1_write_len( &c, tmp_buf, len ) );
ASN1_CHK_ADD( len, asn1_write_tag( &c, tmp_buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ); ASN1_CHK_ADD( len, asn1_write_tag( &c, tmp_buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
/*
* Make signature
*/
md( md_info_from_type( ctx->md_alg ), c, len, hash ); md( md_info_from_type( ctx->md_alg ), c, len, hash );
rsa_pkcs1_sign( ctx->issuer_key, NULL, NULL, RSA_PRIVATE, ctx->md_alg, 0, hash, sig ); if( ( ret = pk_sign( ctx->issuer_key, ctx->md_alg, hash, 0, sig, &sig_len,
NULL, NULL ) ) != 0 )
{
return( ret );
}
/*
* Write data to output buffer
*/
c2 = buf + size; c2 = buf + size;
ASN1_CHK_ADD( sig_len, x509_write_sig( &c2, buf, sig_oid, sig_oid_len, ASN1_CHK_ADD( sig_and_oid_len, x509_write_sig( &c2, buf,
sig, ctx->issuer_key->len ) ); sig_oid, sig_oid_len, sig, sig_len ) );
c2 -= len; c2 -= len;
memcpy( c2, c, len ); memcpy( c2, c, len );
len += sig_len; len += sig_and_oid_len;
ASN1_CHK_ADD( len, asn1_write_len( &c2, buf, len ) ); ASN1_CHK_ADD( len, asn1_write_len( &c2, buf, len ) );
ASN1_CHK_ADD( len, asn1_write_tag( &c2, buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ); ASN1_CHK_ADD( len, asn1_write_tag( &c2, buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );