static void
list_keyblock_colon( KBNODE keyblock, int secret )
{
int rc = 0;
KBNODE kbctx;
KBNODE node;
PKT_public_key *pk;
PKT_secret_key *sk;
u32 keyid[2];
int any=0;
int trustletter = 0;
int ulti_hack = 0;
/* get the keyid from the keyblock */
node = find_kbnode( keyblock, secret? PKT_SECRET_KEY : PKT_PUBLIC_KEY );
if( !node ) {
log_error("Oops; key lost!\n");
dump_kbnode( keyblock );
return;
}
if( secret ) {
pk = NULL;
sk = node->pkt->pkt.secret_key;
keyid_from_sk( sk, keyid );
printf("sec:u:%u:%d:%08lX%08lX:%s:%s:::",
nbits_from_sk( sk ),
sk->pubkey_algo,
(ulong)keyid[0],(ulong)keyid[1],
colon_datestr_from_sk( sk ),
colon_strtime (sk->expiredate)
/* fixme: add LID here */ );
}
else {
pk = node->pkt->pkt.public_key;
sk = NULL;
keyid_from_pk( pk, keyid );
fputs( "pub:", stdout );
trustletter = 0;
if ( !pk->is_valid )
putchar ('i');
else if ( pk->is_revoked )
putchar ('r');
else if ( pk->has_expired )
putchar ('e');
else if ( opt.fast_list_mode || opt.no_expensive_trust_checks )
;
else {
trustletter = query_trust_info( pk, NULL );
if( trustletter == 'u' )
ulti_hack = 1;
putchar(trustletter);
}
printf(":%u:%d:%08lX%08lX:%s:%s:",
nbits_from_pk( pk ),
pk->pubkey_algo,
(ulong)keyid[0],(ulong)keyid[1],
colon_datestr_from_pk( pk ),
colon_strtime (pk->expiredate) );
if( pk->local_id )
printf("%lu", pk->local_id );
putchar(':');
if( pk->local_id && !opt.fast_list_mode
&& !opt.no_expensive_trust_checks )
putchar( get_ownertrust_info( pk->local_id ) );
putchar(':');
}
if (opt.fixed_list_mode) {
/* do not merge the first uid with the primary key */
putchar(':');
putchar(':');
print_capabilities (pk, sk, keyblock);
putchar('\n');
if( opt.fingerprint )
fingerprint( pk, sk );
if( opt.with_key_data )
print_key_data( pk, keyid );
any = 1;
}
for( kbctx=NULL; (node=walk_kbnode( keyblock, &kbctx, 0)) ; ) {
if( node->pkt->pkttype == PKT_USER_ID && !opt.fast_list_mode ) {
/*
* Fixme: We need a is_valid flag here too
*/
if( any ) {
if ( node->pkt->pkt.user_id->is_revoked )
printf("uid:r::::::::");
else if ( opt.no_expensive_trust_checks ) {
printf("uid:::::::::");
}
else {
byte namehash[20];
if( pk && !ulti_hack ) {
if( node->pkt->pkt.user_id->photo )
rmd160_hash_buffer( namehash,
node->pkt->pkt.user_id->photo,
node->pkt->pkt.user_id->photolen);
else
rmd160_hash_buffer( namehash,
node->pkt->pkt.user_id->name,
node->pkt->pkt.user_id->len );
trustletter = query_trust_info( pk, namehash );
}
else
trustletter = 'u';
printf("uid:%c::::::::", trustletter);
}
}
print_string( stdout, node->pkt->pkt.user_id->name,
node->pkt->pkt.user_id->len, ':' );
putchar(':');
if (any)
putchar('\n');
else {
putchar(':');
print_capabilities (pk, sk, keyblock);
putchar('\n');
if( opt.fingerprint )
fingerprint( pk, sk );
if( opt.with_key_data )
print_key_data( pk, keyid );
any = 1;
}
}
else if( node->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
u32 keyid2[2];
PKT_public_key *pk2 = node->pkt->pkt.public_key;
if( !any ) {
putchar(':');
putchar(':');
print_capabilities (pk, sk, keyblock);
putchar('\n');
if( opt.fingerprint )
fingerprint( pk, sk ); /* of the main key */
any = 1;
}
keyid_from_pk( pk2, keyid2 );
fputs ("sub:", stdout );
if ( !pk2->is_valid )
putchar ('i');
else if ( pk2->is_revoked )
putchar ('r');
else if ( pk2->has_expired )
putchar ('e');
else if ( opt.fast_list_mode || opt.no_expensive_trust_checks )
;
else {
printf("%c", trustletter );
}
printf(":%u:%d:%08lX%08lX:%s:%s:",
nbits_from_pk( pk2 ),
pk2->pubkey_algo,
(ulong)keyid2[0],(ulong)keyid2[1],
colon_datestr_from_pk( pk2 ),
colon_strtime (pk2->expiredate)
/* fixme: add LID and ownertrust here */
);
if( pk->local_id ) /* use the local_id of the main key??? */
printf("%lu", pk->local_id );
putchar(':');
putchar(':');
putchar(':');
putchar(':');
print_capabilities (pk2, NULL, NULL);
putchar('\n');
if( opt.fingerprint > 1 )
fingerprint( pk2, NULL );
if( opt.with_key_data )
print_key_data( pk2, keyid2 );
}
else if( node->pkt->pkttype == PKT_SECRET_SUBKEY ) {
u32 keyid2[2];
PKT_secret_key *sk2 = node->pkt->pkt.secret_key;
if( !any ) {
putchar(':');
putchar(':');
print_capabilities (pk, sk, keyblock);
putchar('\n');
if( opt.fingerprint )
fingerprint( pk, sk ); /* of the main key */
any = 1;
}
keyid_from_sk( sk2, keyid2 );
printf("ssb::%u:%d:%08lX%08lX:%s:%s:::::",
nbits_from_sk( sk2 ),
sk2->pubkey_algo,
(ulong)keyid2[0],(ulong)keyid2[1],
colon_datestr_from_sk( sk2 ),
colon_strtime (sk2->expiredate)
/* fixme: add LID */ );
print_capabilities (NULL, sk2, NULL);
putchar ('\n');
if( opt.fingerprint > 1 )
fingerprint( NULL, sk2 );
}
else if( opt.list_sigs && node->pkt->pkttype == PKT_SIGNATURE ) {
PKT_signature *sig = node->pkt->pkt.signature;
int sigrc;
char *sigstr;
if( !any ) { /* no user id, (maybe a revocation follows)*/
if( sig->sig_class == 0x20 )
fputs("[revoked]:", stdout);
else if( sig->sig_class == 0x18 )
fputs("[key binding]:", stdout);
else if( sig->sig_class == 0x28 )
fputs("[subkey revoked]:", stdout);
else
putchar (':');
putchar(':');
print_capabilities (pk, sk, keyblock);
putchar('\n');
if( opt.fingerprint )
fingerprint( pk, sk );
any=1;
}
if( sig->sig_class == 0x20 || sig->sig_class == 0x28
|| sig->sig_class == 0x30 )
sigstr = "rev";
else if( (sig->sig_class&~3) == 0x10 )
sigstr = "sig";
else if( sig->sig_class == 0x18 )
sigstr = "sig";
else {
printf("sig::::::::::%02x:\n",sig->sig_class );
continue;
}
if( opt.check_sigs ) {
fflush(stdout);
rc = check_key_signature( keyblock, node, NULL );
switch( rc ) {
case 0: sigrc = '!'; break;
case G10ERR_BAD_SIGN: sigrc = '-'; break;
case G10ERR_NO_PUBKEY:
case G10ERR_UNU_PUBKEY: sigrc = '?'; break;
default: sigrc = '%'; break;
}
}
else {
rc = 0;
sigrc = ' ';
}
fputs( sigstr, stdout );
putchar(':');
if( sigrc != ' ' )
putchar(sigrc);
printf("::%d:%08lX%08lX:%s::::", sig->pubkey_algo,
(ulong)sig->keyid[0],
(ulong)sig->keyid[1], colon_datestr_from_sig(sig));
if( sigrc == '%' )
printf("[%s] ", g10_errstr(rc) );
else if( sigrc == '?' )
;
else if ( !opt.fast_list_mode ) {
size_t n;
char *p = get_user_id( sig->keyid, &n );
print_string( stdout, p, n, ':' );
m_free(p);
}
printf(":%02x:\n", sig->sig_class );
/* fixme: check or list other sigs here */
}
}
if( !any ) {/* oops, no user id */
putchar(':');
putchar(':');
print_capabilities (pk, sk, keyblock);
putchar('\n');
}
}
static gpg_error_t
get_it (ctrl_t ctrl,
PKT_pubkey_enc *enc, DEK *dek, PKT_public_key *sk, u32 *keyid)
{
gpg_error_t err;
byte *frame = NULL;
unsigned int n;
size_t nframe;
u16 csum, csum2;
int padding;
gcry_sexp_t s_data;
char *desc;
char *keygrip;
byte fp[MAX_FINGERPRINT_LEN];
size_t fpn;
if (DBG_CLOCK)
log_clock ("decryption start");
/* Get the keygrip. */
err = hexkeygrip_from_pk (sk, &keygrip);
if (err)
goto leave;
/* Convert the data to an S-expression. */
if (sk->pubkey_algo == PUBKEY_ALGO_ELGAMAL
|| sk->pubkey_algo == PUBKEY_ALGO_ELGAMAL_E)
{
if (!enc->data[0] || !enc->data[1])
err = gpg_error (GPG_ERR_BAD_MPI);
else
err = gcry_sexp_build (&s_data, NULL, "(enc-val(elg(a%m)(b%m)))",
enc->data[0], enc->data[1]);
}
else if (sk->pubkey_algo == PUBKEY_ALGO_RSA
|| sk->pubkey_algo == PUBKEY_ALGO_RSA_E)
{
if (!enc->data[0])
err = gpg_error (GPG_ERR_BAD_MPI);
else
err = gcry_sexp_build (&s_data, NULL, "(enc-val(rsa(a%m)))",
enc->data[0]);
}
else if (sk->pubkey_algo == PUBKEY_ALGO_ECDH)
{
if (!enc->data[0] || !enc->data[1])
err = gpg_error (GPG_ERR_BAD_MPI);
else
err = gcry_sexp_build (&s_data, NULL, "(enc-val(ecdh(s%m)(e%m)))",
enc->data[1], enc->data[0]);
}
else
err = gpg_error (GPG_ERR_BUG);
if (err)
goto leave;
if (sk->pubkey_algo == PUBKEY_ALGO_ECDH)
{
fingerprint_from_pk (sk, fp, &fpn);
log_assert (fpn == 20);
}
/* Decrypt. */
desc = gpg_format_keydesc (ctrl, sk, FORMAT_KEYDESC_NORMAL, 1);
err = agent_pkdecrypt (NULL, keygrip,
desc, sk->keyid, sk->main_keyid, sk->pubkey_algo,
s_data, &frame, &nframe, &padding);
xfree (desc);
gcry_sexp_release (s_data);
if (err)
goto leave;
/* Now get the DEK (data encryption key) from the frame
*
* Old versions encode the DEK in this format (msb is left):
*
* 0 1 DEK(16 bytes) CSUM(2 bytes) 0 RND(n bytes) 2
*
* Later versions encode the DEK like this:
*
* 0 2 RND(n bytes) 0 A DEK(k bytes) CSUM(2 bytes)
*
* (mpi_get_buffer already removed the leading zero).
*
* RND are non-zero randow bytes.
* A is the cipher algorithm
* DEK is the encryption key (session key) with length k
* CSUM
*/
if (DBG_CRYPTO)
log_printhex (frame, nframe, "DEK frame:");
n = 0;
if (sk->pubkey_algo == PUBKEY_ALGO_ECDH)
{
gcry_mpi_t shared_mpi;
gcry_mpi_t decoded;
/* At the beginning the frame are the bytes of shared point MPI. */
err = gcry_mpi_scan (&shared_mpi, GCRYMPI_FMT_USG, frame, nframe, NULL);
if (err)
{
err = gpg_error (GPG_ERR_WRONG_SECKEY);
goto leave;
}
err = pk_ecdh_decrypt (&decoded, fp, enc->data[1]/*encr data as an MPI*/,
shared_mpi, sk->pkey);
mpi_release (shared_mpi);
if(err)
goto leave;
xfree (frame);
err = gcry_mpi_aprint (GCRYMPI_FMT_USG, &frame, &nframe, decoded);
mpi_release (decoded);
if (err)
goto leave;
/* Now the frame are the bytes decrypted but padded session key. */
/* Allow double padding for the benefit of DEK size concealment.
Higher than this is wasteful. */
if (!nframe || frame[nframe-1] > 8*2 || nframe <= 8
|| frame[nframe-1] > nframe)
{
err = gpg_error (GPG_ERR_WRONG_SECKEY);
goto leave;
}
nframe -= frame[nframe-1]; /* Remove padding. */
log_assert (!n); /* (used just below) */
}
else
{
if (padding)
{
if (n + 7 > nframe)
{
err = gpg_error (GPG_ERR_WRONG_SECKEY);
goto leave;
}
if (frame[n] == 1 && frame[nframe - 1] == 2)
{
log_info (_("old encoding of the DEK is not supported\n"));
err = gpg_error (GPG_ERR_CIPHER_ALGO);
goto leave;
}
if (frame[n] != 2) /* Something went wrong. */
{
err = gpg_error (GPG_ERR_WRONG_SECKEY);
goto leave;
}
for (n++; n < nframe && frame[n]; n++) /* Skip the random bytes. */
;
n++; /* Skip the zero byte. */
}
}
if (n + 4 > nframe)
{
err = gpg_error (GPG_ERR_WRONG_SECKEY);
goto leave;
}
dek->keylen = nframe - (n + 1) - 2;
dek->algo = frame[n++];
err = openpgp_cipher_test_algo (dek->algo);
if (err)
{
if (!opt.quiet && gpg_err_code (err) == GPG_ERR_CIPHER_ALGO)
{
log_info (_("cipher algorithm %d%s is unknown or disabled\n"),
dek->algo,
dek->algo == CIPHER_ALGO_IDEA ? " (IDEA)" : "");
}
dek->algo = 0;
goto leave;
}
if (dek->keylen != openpgp_cipher_get_algo_keylen (dek->algo))
{
err = gpg_error (GPG_ERR_WRONG_SECKEY);
goto leave;
}
/* Copy the key to DEK and compare the checksum. */
csum = buf16_to_u16 (frame+nframe-2);
memcpy (dek->key, frame + n, dek->keylen);
for (csum2 = 0, n = 0; n < dek->keylen; n++)
csum2 += dek->key[n];
if (csum != csum2)
{
err = gpg_error (GPG_ERR_WRONG_SECKEY);
goto leave;
}
if (DBG_CLOCK)
log_clock ("decryption ready");
if (DBG_CRYPTO)
log_printhex (dek->key, dek->keylen, "DEK is:");
/* Check that the algo is in the preferences and whether it has
* expired. Also print a status line with the key's fingerprint. */
{
PKT_public_key *pk = NULL;
PKT_public_key *mainpk = NULL;
KBNODE pkb = get_pubkeyblock (ctrl, keyid);
if (!pkb)
{
err = -1;
log_error ("oops: public key not found for preference check\n");
}
else if (pkb->pkt->pkt.public_key->selfsigversion > 3
&& dek->algo != CIPHER_ALGO_3DES
&& !opt.quiet
&& !is_algo_in_prefs (pkb, PREFTYPE_SYM, dek->algo))
log_info (_("WARNING: cipher algorithm %s not found in recipient"
" preferences\n"), openpgp_cipher_algo_name (dek->algo));
if (!err)
{
kbnode_t k;
int first = 1;
for (k = pkb; k; k = k->next)
{
if (k->pkt->pkttype == PKT_PUBLIC_KEY
|| k->pkt->pkttype == PKT_PUBLIC_SUBKEY)
{
u32 aki[2];
if (first)
{
first = 0;
mainpk = k->pkt->pkt.public_key;
}
keyid_from_pk (k->pkt->pkt.public_key, aki);
if (aki[0] == keyid[0] && aki[1] == keyid[1])
{
pk = k->pkt->pkt.public_key;
break;
}
}
}
if (!pk)
BUG ();
if (pk->expiredate && pk->expiredate <= make_timestamp ())
{
log_info (_("Note: secret key %s expired at %s\n"),
keystr (keyid), asctimestamp (pk->expiredate));
}
}
if (pk && pk->flags.revoked)
{
log_info (_("Note: key has been revoked"));
log_printf ("\n");
show_revocation_reason (ctrl, pk, 1);
}
if (is_status_enabled () && pk && mainpk)
{
char pkhex[MAX_FINGERPRINT_LEN*2+1];
char mainpkhex[MAX_FINGERPRINT_LEN*2+1];
hexfingerprint (pk, pkhex, sizeof pkhex);
hexfingerprint (mainpk, mainpkhex, sizeof mainpkhex);
/* Note that we do not want to create a trustdb just for
* getting the ownertrust: If there is no trustdb there can't
* be ulitmately trusted key anyway and thus the ownertrust
* value is irrelevant. */
write_status_printf (STATUS_DECRYPTION_KEY, "%s %s %c",
pkhex, mainpkhex,
get_ownertrust_info (ctrl, mainpk, 1));
}
release_kbnode (pkb);
err = 0;
}
leave:
xfree (frame);
xfree (keygrip);
return err;
}
