#include "gnutls-helpers.h" #include #include /* Author: Daniel Kahn Gillmor Date: Tue, 01 Apr 2008 License: GPL v3 or later monkeysphere private key translator: execute this with an GPG secret key on stdin (at the moment, only passphraseless RSA keys work). It will spit out a PEM-encoded version of the key on stdout, which can be fed into ssh-add like this: gpg --export-secret-keys $KEYID | monkeysphere | ssh-add -c /dev/stdin Requirements: I've only built this so far with GnuTLS v2.3.4 -- version 2.2.0 does not contain the appropriate pieces. Notes: gpgkey2ssh doesn't seem to provide the same public keys. Mighty weird! 0 wt215@squeak:~/monkeysphere$ gpg --export-secret-keys 1DCDF89F | ~dkg/src/monkeysphere/monkeysphere | ssh-add -c /dev/stdin gnutls version: 2.3.4 OpenPGP RSA Key, with 1024 bits Identity added: /dev/stdin (/dev/stdin) The user has to confirm each use of the key 0 wt215@squeak:~/monkeysphere$ ssh-add -L ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAAgQC9gWQqfrnhQKDQnND/3eOexpddE64J+1zp9fcyCje7H5LKclb6DBV2HS6WgW32PJhIzvP+fYZM3dzXea3fpv14y1SicXiRBDgF9SnsNA1qWn2RyzkLcKy7PmM0PDYtU1oiLTcQj/xkWcqW2sLKHT/WW+vZP5XP7RMGN/yWNMfE2Q== /dev/stdin 0 wt215@squeak:~/monkeysphere$ gpgkey2ssh 1DCDF89F ssh-rsa AAAAB3NzaC1yc2EAAACBAL2BZCp+ueFAoNCc0P/d457Gl10Trgn7XOn19zIKN7sfkspyVvoMFXYdLpaBbfY8mEjO8/59hkzd3Nd5rd+m/XjLVKJxeJEEOAX1Kew0DWpafZHLOQtwrLs+YzQ8Ni1TWiItNxCP/GRZypbawsodP9Zb69k/lc/tEwY3/JY0x8TZAAAAAwEAAQ== COMMENT 0 wt215@squeak:~/monkeysphere$ */ int convert_pgp_to_x509(gnutls_x509_privkey_t* output, gnutls_datum_t* input) { gnutls_openpgp_privkey_t pgp_privkey; gnutls_datum_t m, e, d, p, q, u, g, y, x; gnutls_pk_algorithm_t pgp_algo; unsigned int pgp_bits; int ret; init_datum(&m); init_datum(&e); init_datum(&d); init_datum(&p); init_datum(&q); init_datum(&u); init_datum(&g); init_datum(&y); init_datum(&x); if (ret = gnutls_openpgp_privkey_init(&pgp_privkey), ret) { err("Failed to initialized OpenPGP private key (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: */ if (getenv("MONKEYSPHERE_RAW")) { err("assuming RAW formatted private keys\n"); if (ret = gnutls_openpgp_privkey_import(pgp_privkey, input, GNUTLS_OPENPGP_FMT_RAW, NULL, 0), ret) err("failed to import the OpenPGP private key in RAW format (error: %d)\n", ret); } else { err("assuming BASE64 formatted private keys\n"); if (ret = gnutls_openpgp_privkey_import (pgp_privkey, input, GNUTLS_OPENPGP_FMT_BASE64, NULL, 0), ret) err("failed to import the OpenPGP private key in BASE64 format (error: %d)\n", ret); } pgp_algo = gnutls_openpgp_privkey_get_pk_algorithm(pgp_privkey, &pgp_bits); if (pgp_algo < 0) { err("failed to get OpenPGP key algorithm (error: %d)\n", pgp_algo); return 1; } if (pgp_algo == GNUTLS_PK_RSA) { err("OpenPGP RSA Key, with %d bits\n", pgp_bits); ret = gnutls_openpgp_privkey_export_rsa_raw(pgp_privkey, &m, &e, &d, &p, &q, &u); if (GNUTLS_E_SUCCESS != ret) { err ("failed to export RSA key parameters (error: %d)\n", ret); return 1; } ret = gnutls_x509_privkey_import_rsa_raw (*output, &m, &e, &d, &p, &q, &u); if (GNUTLS_E_SUCCESS != ret) { err ("failed to import RSA key parameters (error: %d)\n", ret); return 1; } } else if (pgp_algo == GNUTLS_PK_DSA) { err("OpenPGP DSA Key, with %d bits\n", pgp_bits); ret = gnutls_openpgp_privkey_export_dsa_raw(pgp_privkey, &p, &q, &g, &y, &x); if (GNUTLS_E_SUCCESS != ret) { err ("failed to export DSA key parameters (error: %d)\n", ret); return 1; } ret = gnutls_x509_privkey_import_dsa_raw (*output, &p, &q, &g, &y, &x); if (GNUTLS_E_SUCCESS != ret) { err ("failed to import 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", pgp_algo); return 1; } ret = gnutls_x509_privkey_fix(*output); if (ret != 0) { err("failed to fix up the private key in X.509 format (error: %d)\n", ret); return 1; } gnutls_openpgp_privkey_deinit(pgp_privkey); return 0; } int convert_x509_to_pgp(gnutls_openpgp_privkey_t* output, gnutls_datum_t* input) { gnutls_x509_privkey_t x509_privkey; gnutls_datum_t m, e, d, p, q, u, g, y, x; gnutls_pk_algorithm_t x509_algo; int ret; init_datum(&m); init_datum(&e); init_datum(&d); init_datum(&p); init_datum(&q); init_datum(&u); init_datum(&g); init_datum(&y); init_datum(&x); if (ret = gnutls_x509_privkey_init(&x509_privkey), ret) { err("Failed to initialized X.509 private key (error: %d)\n", ret); return 1; } /* format could be either: GNUTLS_X509_FMT_DER, GNUTLS_X509_FMT_PEM; if MONKEYSPHERE_DER is set, use DER, otherwise, use PEM: */ if (getenv("MONKEYSPHERE_DER")) { err("assuming DER formatted private keys\n"); if (ret = gnutls_x509_privkey_import(x509_privkey, input, GNUTLS_X509_FMT_DER), ret) err("failed to import the X.509 private key in DER format (error: %d)\n", ret); } else { err("assuming PEM formatted private keys\n"); if (ret = gnutls_x509_privkey_import (x509_privkey, input, GNUTLS_X509_FMT_PEM), ret) err("failed to import the X.509 private key in PEM format (error: %d)\n", ret); } x509_algo = gnutls_x509_privkey_get_pk_algorithm(x509_privkey); if (x509_algo < 0) { err("failed to get X.509 key algorithm (error: %d)\n", x509_algo); return 1; } if (x509_algo == GNUTLS_PK_RSA) { err("X.509 RSA Key\n"); ret = gnutls_x509_privkey_export_rsa_raw(x509_privkey, &m, &e, &d, &p, &q, &u); if (GNUTLS_E_SUCCESS != ret) { err ("failed to export RSA key parameters (error: %d)\n", ret); return 1; } /* ret = gnutls_openpgp_privkey_import_rsa_raw (*output, &m, &e, &d, &p, &q, &u); */ ret = GNUTLS_E_UNIMPLEMENTED_FEATURE; if (GNUTLS_E_SUCCESS != ret) { err ("failed to import RSA key parameters (error: %d)\n", ret); return 1; } } else if (x509_algo == GNUTLS_PK_DSA) { err("X.509 DSA Key\n"); ret = gnutls_x509_privkey_export_dsa_raw(x509_privkey, &p, &q, &g, &y, &x); if (GNUTLS_E_SUCCESS != ret) { err ("failed to export DSA key parameters (error: %d)\n", ret); return 1; } /* ret = gnutls_openpgp_privkey_import_dsa_raw (*output, &p, &q, &g, &y, &x); */ ret = GNUTLS_E_UNIMPLEMENTED_FEATURE; if (GNUTLS_E_SUCCESS != ret) { err ("failed to import 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", x509_algo); return 1; } gnutls_x509_privkey_deinit(x509_privkey); return 0; } int main(int argc, char* argv[]) { gnutls_datum_t data; int ret; gnutls_x509_privkey_t x509_privkey; char output_data[10240]; size_t ods = sizeof(output_data); init_gnutls(); init_datum(&data); /* 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; } /* Or, instead, read in key from a file name: if (ret = set_datum_file(&data, argv[1]), ret) { err("didn't read file '%s'\n", argv[1]); return 1; } */ /* treat the passed file as an X.509 private key, and extract its component values: */ /* if (ret = gnutls_x509_privkey_import(x509_privkey, &data, GNUTLS_X509_FMT_PEM), ret) { */ /* err("Failed to import the X.509 key (error: %d)\n", ret); */ /* return 1; */ /* } */ /* gnutls_x509_privkey_export_rsa_raw(x509_privkey, &m, &e, &d, &p, &q, &u); */ /* try to print the PEM-encoded private key: */ /* ret = gnutls_x509_privkey_export (x509_privkey, */ /* GNUTLS_X509_FMT_PEM, */ /* output_data, */ /* &ods); */ /* printf("ret: %u; ods: %u;\n", ret, ods); */ /* if (ret == 0) { */ /* write(0, output_data, ods); */ /* } */ if (ret = gnutls_x509_privkey_init(&x509_privkey), ret) { err("Failed to initialize X.509 private key (error: %d)\n", ret); return 1; } if (ret = convert_pgp_to_x509(&x509_privkey, &data), ret) { return ret; } ret = gnutls_x509_privkey_export (x509_privkey, GNUTLS_X509_FMT_PEM, output_data, &ods); printf("ret: %u; ods: %u;\n", ret, ods); if (ret == 0) { write(1, output_data, ods); } gnutls_x509_privkey_deinit(x509_privkey); gnutls_global_deinit(); return 0; }