X-Git-Url: https://git.sommitrealweird.co.uk/onak.git/blobdiff_plain/0a3cfdec02106998006653f8ad340e996261a3d5..8d14d66b84cc370cefe54b33de1b95bb49c90bf6:/decodekey.c?ds=sidebyside diff --git a/decodekey.c b/decodekey.c index eb0a79d..606b091 100644 --- a/decodekey.c +++ b/decodekey.c @@ -1,14 +1,9 @@ /* * decodekey.c - Routines to further decode an OpenPGP key. * - * Jonathan McDowell - * - * Copyright 2002 Project Purple - * - * $Id: decodekey.c,v 1.6 2004/05/27 03:24:01 noodles Exp $ + * Copyright 2002-2008 Jonathan McDowell */ -#include #include #include #include @@ -25,19 +20,21 @@ /* * parse_subpackets - Parse the subpackets of a Type 4 signature. * @data: The subpacket data. - * @keyid: A pointer to where we should return the keyid. + * @keyid: A pointer to where we should return the keyid. + * @creationtime: A pointer to where we should return the creation time. * * This function parses the subkey data of a Type 4 signature and fills * in the supplied variables. It also returns the length of the data - * processed. + * processed. If the value of any piece of data is not desired a NULL + * can be passed instead of a pointer to a storage area for that value. */ -int parse_subpackets(unsigned char *data, uint64_t *keyid) +int parse_subpackets(unsigned char *data, uint64_t *keyid, time_t *creation) { int offset = 0; int length = 0; int packetlen = 0; - assert(data != NULL); + log_assert(data != NULL); length = (data[0] << 8) + data[1] + 2; @@ -59,30 +56,46 @@ int parse_subpackets(unsigned char *data, uint64_t *keyid) switch (data[offset] & 0x7F) { case 2: /* - * Signature creation time. Might want to output this? + * Signature creation time. */ + if (creation != NULL) { + *creation = data[offset + packetlen - 4]; + *creation <<= 8; + *creation = data[offset + packetlen - 3]; + *creation <<= 8; + *creation = data[offset + packetlen - 2]; + *creation <<= 8; + *creation = data[offset + packetlen - 1]; + } break; case 3: /* * Signature expiration time. Might want to output this? */ break; + case 6: + /* + * Regular expression for UIDs this sig is over. + */ + break; case 16: - *keyid = data[offset+packetlen - 8]; - *keyid <<= 8; - *keyid += data[offset+packetlen - 7]; - *keyid <<= 8; - *keyid += data[offset+packetlen - 6]; - *keyid <<= 8; - *keyid += data[offset+packetlen - 5]; - *keyid <<= 8; - *keyid += data[offset+packetlen - 4]; - *keyid <<= 8; - *keyid += data[offset+packetlen - 3]; - *keyid <<= 8; - *keyid += data[offset+packetlen - 2]; - *keyid <<= 8; - *keyid += data[offset+packetlen - 1]; + if (keyid != NULL) { + *keyid = data[offset+packetlen - 8]; + *keyid <<= 8; + *keyid += data[offset+packetlen - 7]; + *keyid <<= 8; + *keyid += data[offset+packetlen - 6]; + *keyid <<= 8; + *keyid += data[offset+packetlen - 5]; + *keyid <<= 8; + *keyid += data[offset+packetlen - 4]; + *keyid <<= 8; + *keyid += data[offset+packetlen - 3]; + *keyid <<= 8; + *keyid += data[offset+packetlen - 2]; + *keyid <<= 8; + *keyid += data[offset+packetlen - 1]; + } break; case 20: /* @@ -100,6 +113,11 @@ int parse_subpackets(unsigned char *data, uint64_t *keyid) * Primary UID. */ break; + case 26: + /* + * Policy URI. + */ + break; default: /* * We don't care about unrecognized packets unless bit @@ -141,42 +159,55 @@ struct ll *keysigs(struct ll *curll, } /** - * sig_keyid - Return the keyid for a given OpenPGP signature packet. - * @packet: The signature packet. + * sig_info - Get info on a given OpenPGP signature packet + * @packet: The signature packet + * @keyid: A pointer for where to return the signature keyid + * @creation: A pointer for where to return the signature creation time * - * Returns the keyid for the supplied signature packet. + * Gets any info about a signature packet; parses the subpackets for a v4 + * key or pulls the data directly from v2/3. NULL can be passed for any + * values which aren't cared about. */ -uint64_t sig_keyid(struct openpgp_packet *packet) +void sig_info(struct openpgp_packet *packet, uint64_t *keyid, time_t *creation) { int length = 0; - uint64_t keyid = 0; if (packet != NULL) { - keyid = 0; switch (packet->data[0]) { case 2: case 3: - keyid = packet->data[7]; - keyid <<= 8; - keyid += packet->data[8]; - keyid <<= 8; - keyid += packet->data[9]; - keyid <<= 8; - keyid += packet->data[10]; - keyid <<= 8; - keyid += packet->data[11]; - keyid <<= 8; - keyid += packet->data[12]; - keyid <<= 8; - keyid += packet->data[13]; - keyid <<= 8; - keyid += packet->data[14]; + if (keyid != NULL) { + *keyid = packet->data[7]; + *keyid <<= 8; + *keyid += packet->data[8]; + *keyid <<= 8; + *keyid += packet->data[9]; + *keyid <<= 8; + *keyid += packet->data[10]; + *keyid <<= 8; + *keyid += packet->data[11]; + *keyid <<= 8; + *keyid += packet->data[12]; + *keyid <<= 8; + *keyid += packet->data[13]; + *keyid <<= 8; + *keyid += packet->data[14]; + } + if (creation != NULL) { + *creation = packet->data[3]; + *creation <<= 8; + *creation = packet->data[4]; + *creation <<= 8; + *creation = packet->data[5]; + *creation <<= 8; + *creation = packet->data[6]; + } break; case 4: length = parse_subpackets(&packet->data[4], - &keyid); + keyid, creation); parse_subpackets(&packet->data[length + 4], - &keyid); + keyid, creation); /* * Don't bother to look at the unsigned packets. */ @@ -186,9 +217,25 @@ uint64_t sig_keyid(struct openpgp_packet *packet) } } + return; +} + +/** + * sig_keyid - Return the keyid for a given OpenPGP signature packet. + * @packet: The signature packet. + * + * Returns the keyid for the supplied signature packet. + */ +uint64_t sig_keyid(struct openpgp_packet *packet) +{ + uint64_t keyid = 0; + + sig_info(packet, &keyid, NULL); + return keyid; } + /* * TODO: Abstract out; all our linked lists should be generic and then we can * llsize them.