diff options
author | Micah Anderson <micah@riseup.net> | 2008-06-18 23:35:20 -0400 |
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committer | Micah Anderson <micah@riseup.net> | 2008-06-18 23:35:20 -0400 |
commit | 308aa104f66a40f2426c13b96f48631937502f6b (patch) | |
tree | 55e1b1427ba23750b0c239e5d43fc3ffa49b0293 /gpg2ssh/gpg2ssh.c | |
parent | a9a56853a27e1dbce3c48af327b0adff0e4c38e0 (diff) | |
parent | 9c94e937fbe8beb56956365cac07d6eff45215cd (diff) |
Merge commit 'dkg/master'
Conflicts:
doc/MonkeySpec
Diffstat (limited to 'gpg2ssh/gpg2ssh.c')
-rw-r--r-- | gpg2ssh/gpg2ssh.c | 291 |
1 files changed, 0 insertions, 291 deletions
diff --git a/gpg2ssh/gpg2ssh.c b/gpg2ssh/gpg2ssh.c deleted file mode 100644 index a1e94df..0000000 --- a/gpg2ssh/gpg2ssh.c +++ /dev/null @@ -1,291 +0,0 @@ -#include "gnutls-helpers.h" - -#include <gnutls/openpgp.h> -#include <gnutls/x509.h> - -/* for waitpid() */ -#include <sys/types.h> -#include <sys/wait.h> - -/* - Author: Daniel Kahn Gillmor <dkg@fifthhorseman.net> - Date: Tue, 08 Apr 2008 - License: GPL v3 or later - - monkeysphere public key translator: execute this with an GPG - certificate (public key(s) + userid(s)) on stdin. It currently - only works with RSA keys. - - It will spit out a version of the first key capable of being used - for authentication on stdout. The output format should be suitable - for appending a known_hosts file. - - Requirements: I've only built this so far with GnuTLS v2.3.4 -- - version 2.2.0 does not contain the appropriate pieces. - - */ - -int main(int argc, char* argv[]) { - gnutls_datum_t data; - int ret; - gnutls_openpgp_crt_t openpgp_crt; - gnutls_openpgp_keyid_t keyid; - printable_keyid p_keyid; - unsigned int keyidx; - unsigned int usage, bits; - gnutls_pk_algorithm_t algo; - - gnutls_datum_t m, e, p, q, g, y; - gnutls_datum_t algolabel; - - char output_data[10240]; - char userid[10240]; - size_t uidsz = sizeof(userid); - - const gnutls_datum_t* all[5]; - int pipefd; - pid_t child_pid; - char* const args[] = {"/usr/bin/base64", "--wrap=0", NULL}; - const char* algoname; - int mpicount; - int pipestatus; - - init_gnutls(); - - init_datum(&data); - - init_datum(&m); - init_datum(&e); - init_datum(&p); - init_datum(&q); - init_datum(&g); - init_datum(&y); - - init_datum(&algolabel); - - init_keyid(keyid); - - /* slurp in the private key from stdin */ - if (ret = set_datum_fd(&data, 0), ret) { - err("didn't read file descriptor 0\n"); - return 1; - } - - - if (ret = gnutls_openpgp_crt_init(&openpgp_crt), ret) { - err("Failed to initialize OpenPGP certificate (error: %d)\n", ret); - return 1; - } - - /* format could be either: GNUTLS_OPENPGP_FMT_RAW, - GNUTLS_OPENPGP_FMT_BASE64; if MONKEYSPHERE_RAW is set, use RAW, - otherwise, use BASE64: */ - - /* FIXME: we should be auto-detecting the input format, and - translating it as needed. */ - - if (getenv("MONKEYSPHERE_RAW")) { - err("assuming RAW formatted certificate\n"); - if (ret = gnutls_openpgp_crt_import(openpgp_crt, &data, GNUTLS_OPENPGP_FMT_RAW), ret) { - err("failed to import the OpenPGP certificate in RAW format (error: %d)\n", ret); - return ret; - } - } else { - err("assuming BASE64 formatted certificate\n"); - if (ret = gnutls_openpgp_crt_import (openpgp_crt, &data, GNUTLS_OPENPGP_FMT_BASE64), ret) { - err("failed to import the OpenPGP certificate in BASE64 format (error: %d)\n", ret); - return ret; - } - } - - if (gnutls_openpgp_crt_get_revoked_status(openpgp_crt)) { - err("the primary key was revoked!\n"); - return 1; - } - - /* FIXME: We're currently looking at the primary key or maybe the - first authentication-capable subkey. - - Instead, we should be iterating through the primary key and all - subkeys: for each one with the authentication usage flag set of a - algorithm we can handle, we should output matching UserIDs and - the SSH version of the key. */ - - - if (ret = gnutls_openpgp_crt_get_key_usage(openpgp_crt, &usage), ret) { - err("failed to get the usage flags for the primary key (error: %d)\n", ret); - return ret; - } - if (usage & GNUTLS_KEY_KEY_AGREEMENT) { - err("the primary key can be used for authentication\n"); - - algo = gnutls_openpgp_crt_get_pk_algorithm(openpgp_crt, &bits); - if (algo < 0) { - err("failed to get the algorithm of the OpenPGP public key (error: %d)\n", algo); - return algo; - } else if (algo == GNUTLS_PK_RSA) { - - err("OpenPGP RSA certificate, with %d bits\n", bits); - ret = gnutls_openpgp_crt_get_pk_rsa_raw(openpgp_crt, &m, &e); - if (GNUTLS_E_SUCCESS != ret) { - err ("failed to export RSA key parameters (error: %d)\n", ret); - return 1; - } - } else if (algo == GNUTLS_PK_DSA) { - err("OpenPGP DSA Key, with %d bits\n", bits); - ret = gnutls_openpgp_crt_get_pk_dsa_raw(openpgp_crt, &p, &q, &g, &y); - if (GNUTLS_E_SUCCESS != ret) { - err ("failed to export DSA key parameters (error: %d)\n", ret); - return 1; - } - } else { - err("OpenPGP Key was not RSA or DSA -- can't deal! (actual algorithm was: %d)\n", algo); - return 1; - } - - } else { - err("primary key is only good for: 0x%08x. Trying subkeys...\n", usage); - - if (ret = gnutls_openpgp_crt_get_auth_subkey(openpgp_crt, keyid, 0), ret) { - err("failed to find a subkey capable of authentication (error: %d)\n", ret); - return ret; - } - make_keyid_printable(p_keyid, keyid); - err("found authentication subkey %.16s\n", p_keyid); - - ret = gnutls_openpgp_crt_get_subkey_idx(openpgp_crt, keyid); - if (ret < 0) { - err("could not get the index of subkey %.16s (error: %d)\n", ret); - return ret; - } - keyidx = ret; - - if (gnutls_openpgp_crt_get_subkey_revoked_status(openpgp_crt, keyidx)) { - err("The authentication subkey was revoked!\n"); - return 1; - } - - if (ret = gnutls_openpgp_crt_get_subkey_usage(openpgp_crt, keyidx, &usage), ret) { - err("could not figure out usage of subkey %.16s (error: %d)\n", p_keyid, ret); - return ret; - } - if ((usage & GNUTLS_KEY_KEY_AGREEMENT) == 0) { - err("could not find a subkey with authentication privileges.\n"); - return 1; - } - - /* switch, based on the algorithm in question, to extract the MPI - components: */ - - algo = gnutls_openpgp_crt_get_subkey_pk_algorithm(openpgp_crt, keyidx, &bits); - if (algo < 0) { - err("failed to get the algorithm of the authentication subkey (error: %d)\n", algo); - return algo; - } else if (algo == GNUTLS_PK_RSA) { - - err("OpenPGP RSA subkey, with %d bits\n", bits); - ret = gnutls_openpgp_crt_get_subkey_pk_rsa_raw(openpgp_crt, keyidx, &m, &e); - if (GNUTLS_E_SUCCESS != ret) { - err ("failed to export RSA subkey parameters (error: %d)\n", ret); - return 1; - } - } else if (algo == GNUTLS_PK_DSA) { - err("OpenPGP DSA subkey, with %d bits\n", bits); - ret = gnutls_openpgp_crt_get_subkey_pk_dsa_raw(openpgp_crt, keyidx, &p, &q, &g, &y); - if (GNUTLS_E_SUCCESS != ret) { - err ("failed to export DSA subkey parameters (error: %d)\n", ret); - return 1; - } - } else { - err("OpenPGP subkey was not RSA or DSA -- can't deal! (actual algorithm was: %d)\n", algo); - return 1; - } - } - - /* make sure userid is NULL-terminated */ - userid[sizeof(userid) - 1] = 0; - uidsz--; - - /* FIXME: we're just choosing the first UserID from the certificate: - instead, we should be selecting every User ID that is adequately - signed and matches the spec, and aggregating them with commas for - known_hosts output */ - - if (ret = gnutls_openpgp_crt_get_name(openpgp_crt, 0, userid, &uidsz), ret) { - err("Failed to fetch the first UserID (error: %d)\n", ret); - return ret; - } - - if (ret = validate_ssh_host_userid(userid), ret) { - err("bad userid: not a valid ssh host.\n"); - return ret; - } - - /* remove ssh:// from the beginning of userid */ - memmove(userid, userid + strlen("ssh://"), 1 + strlen(userid) - strlen("ssh://")); - - - /* now we have algo, and the various MPI data are set. Can we - export them cleanly? */ - - /* for the moment, we'll just dump the info raw, and pipe it - externally through coreutils' /usr/bin/base64 */ - - if (algo == GNUTLS_PK_RSA) { - algoname = "ssh-rsa"; - mpicount = 3; - - all[0] = &algolabel; - all[1] = &e; - all[2] = &m; - } else if (algo == GNUTLS_PK_DSA) { - algoname = "ssh-dss"; - mpicount = 5; - - all[0] = &algolabel; - all[1] = &p; - all[2] = &q; - all[3] = &g; - all[4] = &y; - } else { - err("no idea what this algorithm is: %d\n", algo); - return 1; - } - - if (ret = datum_from_string(&algolabel, algoname), ret) { - err("couldn't label string (error: %d)\n", ret); - return ret; - } - - snprintf(output_data, sizeof(output_data), "%s %s ", userid, algoname); - - pipefd = create_writing_pipe(&child_pid, args[0], args); - if (pipefd < 0) { - err("failed to create a writing pipe (returned %d)\n", pipefd); - return pipefd; - } - - write(1, output_data, strlen(output_data)); - - if (0 != write_data_fd_with_length(pipefd, all, mpicount)) { - err("was not able to write out RSA key data\n"); - return 1; - } - close(pipefd); - if (child_pid != waitpid(child_pid, &pipestatus, 0)) { - err("could not wait for child process to return for some reason.\n"); - return 1; - } - if (pipestatus != 0) { - err("base64 pipe died with return code %d\n", pipestatus); - return pipestatus; - } - - write(1, "\n", 1); - - - - gnutls_openpgp_crt_deinit(openpgp_crt); - gnutls_global_deinit(); - return 0; -} |