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support of OpenPGP V4 fingerprints

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This commit is contained in:
Andreas Steffen
2009-07-04 09:26:37 +02:00
parent 876a6d737f
commit 887ed734d0
1 changed files with 40 additions and 22 deletions
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src/pluto/pgpcert.c
+40 -22
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@@ -85,7 +85,7 @@ static u_char pgp_version(chunk_t *blob)
}
/**
* Parse OpenPGP signature packet defined in section 5.2.2 of RFC 2440
* Parse OpenPGP signature packet defined in section 5.2.2 of RFC 4880
*/
static bool parse_pgp_signature_packet(chunk_t *packet, pgpcert_t *cert)
{
@@ -171,8 +171,8 @@ static bool parse_pgp_pubkey_version_validity(chunk_t *packet, pgpcert_t *cert)
*/
static bool parse_pgp_pubkey_packet(chunk_t *packet, pgpcert_t *cert)
{
pgp_pubkey_alg_t pubkey_alg;
public_key_t *key;
chunk_t pubkey_packet = *packet;
pgp_pubkey_alg_t pubkey_alg;
if (!parse_pgp_pubkey_version_validity(packet, cert))
{
@@ -190,33 +190,51 @@ static bool parse_pgp_pubkey_packet(chunk_t *packet, pgpcert_t *cert)
{
case PGP_PUBKEY_ALG_RSA:
case PGP_PUBKEY_ALG_RSA_SIGN_ONLY:
key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
BUILD_BLOB_PGP, *packet,
BUILD_END);
if (key == NULL)
cert->public_key = lib->creds->create(lib->creds,
CRED_PUBLIC_KEY, KEY_RSA,
BUILD_BLOB_PGP, *packet,
BUILD_END);
if (cert->public_key == NULL)
{
return FALSE;
}
cert->public_key = key;
if (cert->version == 3)
{
cert->fingerprint = key->get_id(key, ID_KEY_ID);
if (cert->fingerprint == NULL)
{
return FALSE;
}
}
else
{
plog(" computation of V4 key ID not implemented yet");
return FALSE;
}
break;
default:
plog(" non RSA public keys not supported");
return FALSE;
}
/* compute V4 or V3 fingerprint according to section 12.2 of RFC 4880 */
if (cert->version == 4)
{
char pubkey_packet_header_buf[] = {
0x99, pubkey_packet.len / 256, pubkey_packet.len % 256
};
chunk_t pubkey_packet_header = chunk_from_buf(pubkey_packet_header_buf);
chunk_t hash;
hasher_t *hasher;
hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
if (hasher == NULL)
{
plog("no SHA-1 hasher available");
return FALSE;
}
hasher->allocate_hash(hasher, pubkey_packet_header, NULL);
hasher->allocate_hash(hasher, pubkey_packet, &hash);
hasher->destroy(hasher);
cert->fingerprint = identification_create_from_encoding(ID_KEY_ID, hash);
free(hash.ptr);
}
else
{
/* V3 fingerprint is computed by public_key_t class */
cert->fingerprint = cert->public_key->get_id(cert->public_key, ID_KEY_ID);
if (cert->fingerprint == NULL)
{
return FALSE;
}
}
return TRUE;
}