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* keyid.c (keyid_from_sk, keyid_from_pk, fingerprint_from_pk,

Browse Source 
fingerprint_from_sk): Enforce the v3-is-only-RSA rule.  Anything that
isn't RSA gets a zero keyid and fingerprint.
This commit is contained in:
David Shaw 2003-12-10 01:52:33 +00:00
parent 4830eb7cae
commit 08967eb985
2 changed files with 84 additions and 49 deletions
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4
g10/ChangeLog
View File

@ -1,5 +1,9 @@
2003-12-09 David Shaw <dshaw@jabberwocky.com>
* keyid.c (keyid_from_sk, keyid_from_pk, fingerprint_from_pk,
fingerprint_from_sk): Enforce the v3-is-only-RSA rule. Anything
that isn't RSA gets a zero keyid and fingerprint.
* keyid.c (do_fingerprint_md): Properly handle hashing of keys
that we don't know the structure of by using the opaque MPI.
(do_fingerprint_md_sk): We cannot calculate the fingerprint from a

129
g10/keyid.c
View File

@ -33,7 +33,6 @@
#include "keydb.h"
#include "i18n.h"
int
pubkey_letter( int algo )
{
@ -149,10 +148,14 @@ keyid_from_sk( PKT_secret_key *sk, u32 *keyid )
if( !keyid )
keyid = dummy_keyid;
if( sk->version < 4 && is_RSA(sk->pubkey_algo) ) {
lowbits = pubkey_get_npkey(sk->pubkey_algo) ?
mpi_get_keyid( sk->skey[0], keyid ) : 0; /* take n */
}
if( sk->version < 4 )
{
if( is_RSA(sk->pubkey_algo) )
lowbits = pubkey_get_npkey(sk->pubkey_algo) ?
mpi_get_keyid( sk->skey[0], keyid ) : 0; /* take n */
else
keyid[0]=keyid[1]=lowbits=0;
}
else {
const byte *dp;
MD_HANDLE md;
@ -191,12 +194,18 @@ keyid_from_pk( PKT_public_key *pk, u32 *keyid )
keyid[1] = pk->keyid[1];
lowbits = keyid[1];
}
else if( pk->version < 4 && is_RSA(pk->pubkey_algo) ) {
lowbits = pubkey_get_npkey(pk->pubkey_algo) ?
mpi_get_keyid( pk->pkey[0], keyid ) : 0 ; /* from n */
pk->keyid[0] = keyid[0];
pk->keyid[1] = keyid[1];
}
else if( pk->version < 4 )
{
if( is_RSA(pk->pubkey_algo) )
{
lowbits = pubkey_get_npkey(pk->pubkey_algo) ?
mpi_get_keyid( pk->pkey[0], keyid ) : 0 ; /* from n */
pk->keyid[0] = keyid[0];
pk->keyid[1] = keyid[1];
}
else
pk->keyid[0]=pk->keyid[1]=keyid[0]=keyid[1]=lowbits=0;
}
else {
const byte *dp;
MD_HANDLE md;
@ -452,26 +461,37 @@ fingerprint_from_pk( PKT_public_key *pk, byte *array, size_t *ret_len )
size_t len;
unsigned int n;
if( pk->version < 4 && is_RSA(pk->pubkey_algo) ) {
/* RSA in version 3 packets is special */
MD_HANDLE md;
if( pk->version < 4 )
{
if( is_RSA(pk->pubkey_algo) )
{
/* RSA in version 3 packets is special */
MD_HANDLE md;
md = md_open( DIGEST_ALGO_MD5, 0);
if( pubkey_get_npkey( pk->pubkey_algo ) > 1 ) {
p = buf = mpi_get_buffer( pk->pkey[0], &n, NULL );
md_write( md, p, n );
m_free(buf);
p = buf = mpi_get_buffer( pk->pkey[1], &n, NULL );
md_write( md, p, n );
m_free(buf);
}
md_final(md);
if( !array )
array = m_alloc( 16 );
len = 16;
memcpy(array, md_read(md, DIGEST_ALGO_MD5), 16 );
md_close(md);
}
md = md_open( DIGEST_ALGO_MD5, 0);
if( pubkey_get_npkey( pk->pubkey_algo ) > 1 ) {
p = buf = mpi_get_buffer( pk->pkey[0], &n, NULL );
md_write( md, p, n );
m_free(buf);
p = buf = mpi_get_buffer( pk->pkey[1], &n, NULL );
md_write( md, p, n );
m_free(buf);
}
md_final(md);
if( !array )
array = m_alloc( 16 );
len = 16;
memcpy(array, md_read(md, DIGEST_ALGO_MD5), 16 );
md_close(md);
}
else
{
if(!array)
array=m_alloc(16);
len=16;
memset(array,0,16);
}
}
else {
MD_HANDLE md;
md = do_fingerprint_md(pk);
@ -498,26 +518,37 @@ fingerprint_from_sk( PKT_secret_key *sk, byte *array, size_t *ret_len )
size_t len;
unsigned n;
if( sk->version < 4 && is_RSA(sk->pubkey_algo) ) {
/* RSA in version 3 packets is special */
MD_HANDLE md;
if( sk->version < 4 )
{
if( is_RSA(sk->pubkey_algo) )
{
/* RSA in version 3 packets is special */
MD_HANDLE md;
md = md_open( DIGEST_ALGO_MD5, 0);
if( pubkey_get_npkey( sk->pubkey_algo ) > 1 ) {
p = buf = mpi_get_buffer( sk->skey[0], &n, NULL );
md_write( md, p, n );
m_free(buf);
p = buf = mpi_get_buffer( sk->skey[1], &n, NULL );
md_write( md, p, n );
m_free(buf);
}
md_final(md);
if( !array )
array = m_alloc( 16 );
len = 16;
memcpy(array, md_read(md, DIGEST_ALGO_MD5), 16 );
md_close(md);
}
md = md_open( DIGEST_ALGO_MD5, 0);
if( pubkey_get_npkey( sk->pubkey_algo ) > 1 ) {
p = buf = mpi_get_buffer( sk->skey[0], &n, NULL );
md_write( md, p, n );
m_free(buf);
p = buf = mpi_get_buffer( sk->skey[1], &n, NULL );
md_write( md, p, n );
m_free(buf);
}
md_final(md);
if( !array )
array = m_alloc( 16 );
len = 16;
memcpy(array, md_read(md, DIGEST_ALGO_MD5), 16 );
md_close(md);
}
else
{
if(!array)
array=m_alloc(16);
len=16;
memset(array,0,16);
}
}
else {
MD_HANDLE md;
md = do_fingerprint_md_sk(sk);