+++ /dev/null
-/* Author: Daniel Kahn Gillmor <dkg@fifthhorseman.net> */
-/* Date: Fri, 04 Apr 2008 19:31:16 -0400 */
-/* License: GPL v3 or later */
-
-#include "gnutls-helpers.h"
-/* for htonl() */
-#include <arpa/inet.h>
-
-/* for setlocale() */
-#include <locale.h>
-
-/* for isalnum() */
-#include <ctype.h>
-
-/* for exit() */
-#include <unistd.h>
-
-#include <assert.h>
-
-/* higher levels allow more frivolous error messages through.
- this is set with the MONKEYSPHERE_DEBUG variable */
-static int loglevel = 0;
-
-void err(int level, const char* fmt, ...) {
- va_list ap;
- if (level > loglevel)
- return;
- va_start(ap, fmt);
- vfprintf(stderr, fmt, ap);
- va_end(ap);
- fflush(stderr);
-}
-
-void logfunc(int level, const char* string) {
- fprintf(stderr, "GnuTLS Logging (%d): %s\n", level, string);
-}
-
-void init_keyid(gnutls_openpgp_keyid_t keyid) {
- memset(keyid, 'x', sizeof(gnutls_openpgp_keyid_t));
-}
-
-
-
-void make_keyid_printable(printable_keyid out, gnutls_openpgp_keyid_t keyid)
-{
- assert(sizeof(out) >= 2*sizeof(keyid));
- hex_print_data((char*)out, (const unsigned char*)keyid, sizeof(keyid));
-}
-
-/* you must have twice as many bytes in the out buffer as in the in buffer */
-void hex_print_data(char* out, const unsigned char* in, size_t incount)
-{
- static const char hex[16] = "0123456789ABCDEF";
- unsigned int inix = 0, outix = 0;
-
- while (inix < incount) {
- out[outix] = hex[(in[inix] >> 4) & 0x0f];
- out[outix + 1] = hex[in[inix] & 0x0f];
- inix++;
- outix += 2;
- }
-}
-
-unsigned char hex2bin(unsigned char x) {
- if ((x >= '0') && (x <= '9'))
- return x - '0';
- if ((x >= 'A') && (x <= 'F'))
- return 10 + x - 'A';
- if ((x >= 'a') && (x <= 'f'))
- return 10 + x - 'a';
- return 0xff;
-}
-
-void collapse_printable_keyid(gnutls_openpgp_keyid_t out, printable_keyid in) {
- unsigned int pkix = 0, outkix = 0;
- while (pkix < sizeof(printable_keyid)) {
- unsigned hi = hex2bin(in[pkix]);
- unsigned lo = hex2bin(in[pkix + 1]);
- if (hi == 0xff) {
- err(0, "character '%c' is not a hex char\n", in[pkix]);
- exit(1);
- }
- if (lo == 0xff) {
- err(0, "character '%c' is not a hex char\n", in[pkix + 1]);
- exit(1);
- }
- out[outkix] = lo | (hi << 4);
-
- pkix += 2;
- outkix++;
- }
-}
-
-unsigned int hexstring2bin(unsigned char* out, const char* in) {
- unsigned int pkix = 0, outkix = 0;
- int hi = 0; /* which nybble is it? */
-
- while (in[pkix]) {
- unsigned char z = hex2bin(in[pkix]);
- if (z != 0xff) {
- if (!hi) {
- if (out) out[outkix] = (z << 4);
- hi = 1;
- } else {
- if (out) out[outkix] |= z;
- hi = 0;
- outkix++;
- }
- pkix++;
- }
- }
- return outkix*8 + (hi ? 4 : 0);
-}
-
-int convert_string_to_keyid(gnutls_openpgp_keyid_t out, const char* str) {
- printable_keyid p;
- int ret;
-
- ret = convert_string_to_printable_keyid(p, str);
- if (ret == 0)
- collapse_printable_keyid(out, p);
- return ret;
-}
-int convert_string_to_printable_keyid(printable_keyid pkeyid, const char* str) {
- int arglen, x;
- arglen = 0;
- x = 0;
- while ((arglen <= sizeof(printable_keyid)) &&
- (str[x] != '\0')) {
- if (isxdigit(str[x])) {
- if (arglen == sizeof(printable_keyid)) {
- err(0, "There are more than %d hex digits in the keyid '%s'\n", sizeof(printable_keyid), str);
- return 1;
- }
- pkeyid[arglen] = str[x];
- arglen++;
- }
- x++;
- }
-
- if (arglen != sizeof(printable_keyid)) {
- err(0, "Keyid '%s' is not %d hex digits in length\n", str, sizeof(printable_keyid));
- return 1;
- }
- return 0;
-}
-
-
-
-int init_gnutls() {
- const char* version = NULL;
- const char* debug_string = NULL;
- int ret;
-
- if (debug_string = getenv("MONKEYSPHERE_DEBUG"), debug_string) {
- loglevel = atoi(debug_string);
- }
-
- if (ret = gnutls_global_init(), ret) {
- err(0, "Failed to do gnutls_global_init() (error: %d)\n", ret);
- return 1;
- }
-
- version = gnutls_check_version(NULL);
-
- if (version)
- err(1, "gnutls version: %s\n", version);
- else {
- err(0, "no gnutls version found!\n");
- return 1;
- }
-
- gnutls_global_set_log_function(logfunc);
-
- gnutls_global_set_log_level(loglevel);
- err(1, "set log level to %d\n", loglevel);
-
- return 0;
-}
-
-void init_datum(gnutls_datum_t* d) {
- d->data = NULL;
- d->size = 0;
-}
-void copy_datum(gnutls_datum_t* dest, const gnutls_datum_t* src) {
- dest->data = gnutls_realloc(dest->data, src->size);
- dest->size = src->size;
- memcpy(dest->data, src->data, src->size);
-}
-int compare_data(const gnutls_datum_t* a, const gnutls_datum_t* b) {
- if (a->size > b->size) {
- err(0,"a is larger\n");
- return 1;
- }
- if (a->size < b->size) {
- err(0,"b is larger\n");
- return -1;
- }
- return memcmp(a->data, b->data, a->size);
-}
-void free_datum(gnutls_datum_t* d) {
- gnutls_free(d->data);
- d->data = NULL;
- d->size = 0;
-}
-
-/* read the passed-in string, store in a single datum */
-int set_datum_string(gnutls_datum_t* d, const char* s) {
- unsigned int x = strlen(s)+1;
- unsigned char* c = NULL;
-
- c = gnutls_realloc(d->data, x);
- if (NULL == c)
- return -1;
- d->data = c;
- d->size = x;
- memcpy(d->data, s, x);
- return 0;
-}
-
-/* read the passed-in file descriptor until EOF, store in a single
- datum */
-int set_datum_fd(gnutls_datum_t* d, int fd) {
- unsigned int bufsize = 1024;
- unsigned int len = 0;
-
- FILE* f = fdopen(fd, "r");
- if (bufsize > d->size) {
- bufsize = 1024;
- d->data = gnutls_realloc(d->data, bufsize);
- if (d->data == NULL) {
- err(0,"out of memory!\n");
- return -1;
- }
- d->size = bufsize;
- } else {
- bufsize = d->size;
- }
- f = fdopen(fd, "r");
- if (NULL == f) {
- err(0,"could not fdopen FD %d\n", fd);
- }
- clearerr(f);
- while (!feof(f) && !ferror(f)) {
- if (len == bufsize) {
- /* allocate more space by doubling: */
- bufsize *= 2;
- d->data = gnutls_realloc(d->data, bufsize);
- if (d->data == NULL) {
- err(0,"out of memory!\n");
- return -1;
- };
- d->size = bufsize;
- }
- len += fread(d->data + len, 1, bufsize - len, f);
- /* err(0,"read %d bytes\n", len); */
- }
- if (ferror(f)) {
- err(0,"Error reading from fd %d (error: %d) (error: %d '%s')\n", fd, ferror(f), errno, strerror(errno));
- return -1;
- }
-
- /* touch up buffer size to match reality: */
- d->data = gnutls_realloc(d->data, len);
- d->size = len;
- return 0;
-}
-
-/* read the file indicated (by name) in the fname parameter. store
- its entire contents in a single datum. */
-int set_datum_file(gnutls_datum_t* d, const char* fname) {
- struct stat sbuf;
- unsigned char* c = NULL;
- FILE* file = NULL;
- size_t x = 0;
-
- if (0 != stat(fname, &sbuf)) {
- err(0,"failed to stat '%s'\n", fname);
- return -1;
- }
-
- c = gnutls_realloc(d->data, sbuf.st_size);
- if (NULL == c) {
- err(0,"failed to allocate %d bytes for '%s'\n", sbuf.st_size, fname);
- return -1;
- }
-
- d->data = c;
- d->size = sbuf.st_size;
- file = fopen(fname, "r");
- if (NULL == file) {
- err(0,"failed to open '%s' for reading\n", fname);
- return -1;
- }
-
- x = fread(d->data, d->size, 1, file);
- if (x != 1) {
- err(0,"tried to read %d bytes, read %d instead from '%s'\n", d->size, x, fname);
- fclose(file);
- return -1;
- }
- fclose(file);
- return 0;
-}
-
-int write_datum_fd(int fd, const gnutls_datum_t* d) {
- if (d->size != write(fd, d->data, d->size)) {
- err(0,"failed to write body of datum.\n");
- return -1;
- }
- return 0;
-}
-
-
-int write_datum_fd_with_length(int fd, const gnutls_datum_t* d) {
- uint32_t len;
- int looks_negative = (d->data[0] & 0x80);
- unsigned char zero = 0;
-
- /* if the first bit is 1, then the datum will appear negative in the
- MPI encoding style used by OpenSSH. In that case, we'll increase
- the length by one, and dump out one more byte */
-
- if (looks_negative) {
- len = htonl(d->size + 1);
- } else {
- len = htonl(d->size);
- }
- if (write(fd, &len, sizeof(len)) != sizeof(len)) {
- err(0,"failed to write size of datum.\n");
- return -2;
- }
- if (looks_negative) {
- if (write(fd, &zero, 1) != 1) {
- err(0,"failed to write padding byte for MPI.\n");
- return -2;
- }
- }
- return write_datum_fd(fd, d);
-}
-
-int write_data_fd_with_length(int fd, const gnutls_datum_t** d, unsigned int num) {
- unsigned int i;
- int ret;
-
- for (i = 0; i < num; i++)
- if (ret = write_datum_fd_with_length(fd, d[i]), ret != 0)
- return ret;
-
- return 0;
-}
-
-
-int datum_from_string(gnutls_datum_t* d, const char* str) {
- d->size = strlen(str);
- d->data = gnutls_realloc(d->data, d->size);
- if (d->data == 0)
- return ENOMEM;
- memcpy(d->data, str, d->size);
- return 0;
-}
-
-
-int create_writing_pipe(pid_t* pid, const char* path, char* const argv[]) {
- int p[2];
- int ret;
-
- if (pid == NULL) {
- err(0,"bad pointer passed to create_writing_pipe()\n");
- return -1;
- }
-
- if (ret = pipe(p), ret == -1) {
- err(0,"failed to create a pipe (error: %d \"%s\")\n", errno, strerror(errno));
- return -1;
- }
-
- *pid = fork();
- if (*pid == -1) {
- err(0,"Failed to fork (error: %d \"%s\")\n", errno, strerror(errno));
- return -1;
- }
- if (*pid == 0) { /* this is the child */
- close(p[1]); /* close unused write end */
-
- if (0 != dup2(p[0], 0)) { /* map the reading end into stdin */
- err(0,"Failed to transfer reading file descriptor to stdin (error: %d \"%s\")\n", errno, strerror(errno));
- exit(1);
- }
- execvp(path, argv);
- err(0,"exec %s failed (error: %d \"%s\")\n", path, errno, strerror(errno));
- /* close the open file descriptors */
- close(p[0]);
- close(0);
-
- exit(1);
- } else { /* this is the parent */
- close(p[0]); /* close unused read end */
- return p[1];
- }
-}
-
-int validate_ssh_host_userid(const char* userid) {
- char* oldlocale = setlocale(LC_ALL, "C");
-
- /* choke if userid does not match the expected format
- ("ssh://fully.qualified.domain.name") */
- if (strncmp("ssh://", userid, strlen("ssh://")) != 0) {
- err(0,"The user ID should start with ssh:// for a host key\n");
- goto fail;
- }
- /* so that isalnum will work properly */
- userid += strlen("ssh://");
- while (0 != (*userid)) {
- if (!isalnum(*userid)) {
- err(0,"label did not start with a letter or a digit! (%s)\n", userid);
- goto fail;
- }
- userid++;
- while (isalnum(*userid) || ('-' == (*userid)))
- userid++;
- if (('.' == (*userid)) || (0 == (*userid))) { /* clean end of label:
- check last char
- isalnum */
- if (!isalnum(*(userid - 1))) {
- err(0,"label did not end with a letter or a digit!\n");
- goto fail;
- }
- if ('.' == (*userid)) /* advance to the start of the next label */
- userid++;
- } else {
- err(0,"invalid character in domain name: %c\n", *userid);
- goto fail;
- }
- }
- /* ensure that the last character is valid: */
- if (!isalnum(*(userid - 1))) {
- err(0,"hostname did not end with a letter or a digit!\n");
- goto fail;
- }
- /* FIXME: fqdn's can be unicode now, thanks to RFC 3490 -- how do we
- make sure that we've got an OK string? */
-
- return 0;
-
- fail:
- setlocale(LC_ALL, oldlocale);
- return 1;
-}
-
-/* http://tools.ietf.org/html/rfc4880#section-5.5.2 */
-size_t get_openpgp_mpi_size(gnutls_datum_t* d) {
- return 2 + d->size;
-}
-
-int write_openpgp_mpi_to_fd(int fd, gnutls_datum_t* d) {
- uint16_t x;
-
- x = d->size * 8;
- x = htons(x);
-
- write(fd, &x, sizeof(x));
- write(fd, d->data, d->size);
-
- return 0;
-}
+++ /dev/null
-/* Author: Daniel Kahn Gillmor <dkg@fifthhorseman.net> */
-/* Date: Fri, 04 Apr 2008 19:31:16 -0400 */
-/* License: GPL v3 or later */
-
-
-#include <gnutls/gnutls.h>
-#include <gnutls/openpgp.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <stdarg.h>
-
-/* Functions to help dealing with GnuTLS for monkeysphere key
- translation projects: */
-
-/* set everything up, including logging levels. Return 0 on
- success */
-int init_gnutls();
-
-/* logging and output functions: */
-
-void err(int level, const char* fmt, ...);
-void logfunc(int level, const char* string);
-
-/* basic datum manipulations: */
-
-void init_datum(gnutls_datum_t* d);
-void copy_datum(gnutls_datum_t* dest, const gnutls_datum_t* src);
-int compare_data(const gnutls_datum_t* a, const gnutls_datum_t* b);
-void free_datum(gnutls_datum_t* d);
-int write_datum_fd(int fd, const gnutls_datum_t* d);
-int write_datum_fd_with_length(int fd, const gnutls_datum_t* d);
-int write_data_fd_with_length(int fd, const gnutls_datum_t** d, unsigned int num);
-
-/* set up a datum from a null-terminated string */
-int datum_from_string(gnutls_datum_t* d, const char* str);
-
-/* keyid manipulations: */
-typedef unsigned char printable_keyid[16];
-
-void init_keyid(gnutls_openpgp_keyid_t keyid);
-void make_keyid_printable(printable_keyid out, gnutls_openpgp_keyid_t keyid);
-void collapse_printable_keyid(gnutls_openpgp_keyid_t out, printable_keyid in);
-int convert_string_to_keyid(gnutls_openpgp_keyid_t out, const char* str);
-int convert_string_to_printable_keyid(printable_keyid out, const char* str);
-
-/* you must have twice as many bytes in the out buffer as in the in buffer */
-void hex_print_data(char* out, const unsigned char* in, size_t incount);
-
-/* expects a null-terminated string as in, containing an even number
- of hexadecimal characters.
-
- returns length in *bits* of raw data as output.
-
- the out buffer must be at least half as long as in to hold the
- output. if out is NULL, no output will be generated, but the
- length will still be returned.
-*/
-unsigned int hexstring2bin(unsigned char* out, const char* in);
-
-/* functions to get data into datum objects: */
-
-/* read the passed-in string, store in a single datum */
-int set_datum_string(gnutls_datum_t* d, const char* s);
-
-/* read the passed-in file descriptor until EOF, store in a single
- datum */
-int set_datum_fd(gnutls_datum_t* d, int fd);
-
-/* read the file indicated (by name) in the fname parameter. store
- its entire contents in a single datum. */
-int set_datum_file(gnutls_datum_t* d, const char* fname);
-
-/* set up file descriptor pipe for writing (child process pid gets
- stored in pid, fd is returned)*/
-int create_writing_pipe(pid_t* pid, const char* path, char* const argv[]);
-
-/* return 0 if userid matches the monkeysphere spec for ssh host user IDs */
-int validate_ssh_host_userid(const char* userid);
-
-/* how many bytes will it take to write out this datum in OpenPGP MPI form? */
-size_t get_openpgp_mpi_size(gnutls_datum_t* d);
-
-/* write the MPI stored in gnutls_datum_t to file descriptor fd: */
-int write_openpgp_mpi_to_fd(int fd, gnutls_datum_t* d);
+++ /dev/null
-#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: 2008-06-12 13:47:41-0400
- License: GPL v3 or later
-
- monkeysphere key translator: execute this with an OpenPGP key on
- stdin, (please indicate the specific keyid that you want as the
- first argument if there are subkeys). At the moment, only public
- keys and passphraseless secret keys work.
-
- For secret keys, 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 | openpgp2ssh $KEYID | ssh-add -c /dev/stdin
-
- For public keys, it will spit out a single line of text that can
- (with some massaging) be used in an openssh known_hosts or
- authorized_keys file. For example:
-
- echo server.example.org $(gpg --export $KEYID | openpgp2ssh $KEYID) >> ~/.ssh/known_hosts
-
- Requirements: I've only built this so far with GnuTLS v2.3.x.
- GnuTLS 2.2.x does not contain the appropriate functionality.
-
- */
-
-
-/* FIXME: keyid should be const as well */
-int convert_private_pgp_to_x509(gnutls_x509_privkey_t* output, const gnutls_openpgp_privkey_t* pgp_privkey, const unsigned char* keyfpr, unsigned int fprlen) {
- gnutls_datum_t m, e, d, p, q, u, g, y, x;
- gnutls_pk_algorithm_t pgp_algo;
- unsigned int pgp_bits;
- int ret;
- int subkeyidx;
- int subkeycount;
- int found = 0;
- unsigned char fingerprint[20];
- size_t fingerprint_length = sizeof(fingerprint);
-
- 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);
-
- subkeycount = gnutls_openpgp_privkey_get_subkey_count(*pgp_privkey);
- if (subkeycount < 0) {
- err(0,"Could not determine subkey count (got value %d)\n", subkeycount);
- return 1;
- }
-
- if ((keyfpr == NULL) &&
- (subkeycount > 0)) {
- err(0,"No key identifier passed in, but there were %d keys to choose from\n", subkeycount + 1);
- return 1;
- }
-
- if (keyfpr != NULL) {
- ret = gnutls_openpgp_privkey_get_fingerprint(*pgp_privkey, fingerprint, &fingerprint_length);
- if (ret) {
- err(0,"Could not get fingerprint (error: %d)\n", ret);
- return 1;
- }
- if (fprlen > fingerprint_length) {
- err(0, "Requested key identifier is longer than computed fingerprint\n");
- return 1;
- }
- if (fingerprint_length > fprlen) {
- err(0, "Only comparing last %d bits of key fingerprint\n", fprlen*8);
- }
- }
- if ((keyfpr == NULL) || (memcmp(fingerprint + (fingerprint_length - fprlen), keyfpr, fprlen) == 0)) {
- /* we want to export the primary key: */
- err(0,"exporting primary key\n");
-
- /* FIXME: this is almost identical to the block below for subkeys.
- This clumsiness seems inherent in the gnutls OpenPGP API,
- though. ugh. */
- pgp_algo = gnutls_openpgp_privkey_get_pk_algorithm(*pgp_privkey, &pgp_bits);
- if (pgp_algo < 0) {
- err(0, "failed to get OpenPGP key algorithm (error: %d)\n", pgp_algo);
- return 1;
- }
- if (pgp_algo == GNUTLS_PK_RSA) {
- err(0,"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(0, "failed to export RSA key parameters (error: %d)\n", ret);
- return 1;
- }
-
- } else if (pgp_algo == GNUTLS_PK_DSA) {
- err(0,"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(0,"failed to export DSA key parameters (error: %d)\n", ret);
- return 1;
- }
- }
- found = 1;
- } else {
- /* lets trawl through the subkeys until we find the one we want: */
- for (subkeyidx = 0; (subkeyidx < subkeycount) && !found; subkeyidx++) {
- ret = gnutls_openpgp_privkey_get_subkey_fingerprint(*pgp_privkey, subkeyidx, fingerprint, &fingerprint_length);
- if (ret) {
- err(0,"Could not get fingerprint of subkey with index %d (error: %d)\n", subkeyidx, ret);
- return 1;
- }
- if (fprlen > fingerprint_length) {
- err(0, "Requested key identifier is longer than computed fingerprint\n");
- return 1;
- }
- if (fingerprint_length > fprlen) {
- err(1, "Only comparing last %d bits of key fingerprint\n", fprlen*8);
- }
- if (memcmp(fingerprint + (fingerprint_length - fprlen), keyfpr, fprlen) == 0) {
- err(0,"exporting subkey index %d\n", subkeyidx);
-
- /* FIXME: this is almost identical to the block above for the
- primary key. */
- pgp_algo = gnutls_openpgp_privkey_get_subkey_pk_algorithm(*pgp_privkey, subkeyidx, &pgp_bits);
- if (pgp_algo < 0) {
- err(0,"failed to get the algorithm of the OpenPGP public key (error: %d)\n", pgp_algo);
- return pgp_algo;
- } else if (pgp_algo == GNUTLS_PK_RSA) {
- err(0,"OpenPGP RSA key, with %d bits\n", pgp_bits);
- ret = gnutls_openpgp_privkey_export_subkey_rsa_raw(*pgp_privkey, subkeyidx, &m, &e, &d, &p, &q, &u);
- if (GNUTLS_E_SUCCESS != ret) {
- err(0,"failed to export RSA key parameters (error: %d)\n", ret);
- return 1;
- }
- } else if (pgp_algo == GNUTLS_PK_DSA) {
- err(0,"OpenPGP DSA Key, with %d bits\n", pgp_bits);
- ret = gnutls_openpgp_privkey_export_subkey_dsa_raw(*pgp_privkey, subkeyidx, &p, &q, &g, &y, &x);
- if (GNUTLS_E_SUCCESS != ret) {
- err(0,"failed to export DSA key parameters (error: %d)\n", ret);
- return 1;
- }
- }
- found = 1;
- }
- }
- }
-
- if (!found) {
- err(0,"Could not find key in input\n");
- return 1;
- }
-
- if (pgp_algo == GNUTLS_PK_RSA) {
- ret = gnutls_x509_privkey_import_rsa_raw (*output, &m, &e, &d, &p, &q, &u);
- if (GNUTLS_E_SUCCESS != ret) {
- err(0, "failed to import RSA key parameters (error: %d)\n", ret);
- return 1;
- }
- } else if (pgp_algo == GNUTLS_PK_DSA) {
- ret = gnutls_x509_privkey_import_dsa_raw (*output, &p, &q, &g, &y, &x);
- if (GNUTLS_E_SUCCESS != ret) {
- err(0,"failed to import DSA key parameters (error: %d)\n", ret);
- return 1;
- }
- } else {
- err(0,"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(0,"failed to fix up the private key in X.509 format (error: %d)\n", ret);
- return 1;
- }
-
- return 0;
-}
-
-/* FIXME: keyid should be const also */
-int emit_public_openssh_from_pgp(const gnutls_openpgp_crt_t* pgp_crt, const unsigned char* keyfpr, size_t fprlen) {
- int ret;
- int subkeyidx;
- int subkeycount;
- int found = 0;
- gnutls_datum_t m, e, p, q, g, y, algolabel;
- unsigned int bits;
- gnutls_pk_algorithm_t algo;
- const gnutls_datum_t* all[5];
- const char* algoname;
- int mpicount;
- /* output_data must be at least 2 chars longer than the maximum possible
- algorithm name: */
- char output_data[20];
-
- unsigned char fingerprint[20];
- size_t fingerprint_length = sizeof(fingerprint);
-
- /* variables for the output conversion: */
- int pipestatus;
- int pipefd, child_pid;
- char* const b64args[] = {"sh", "-c", "base64 | tr -c -d '[A-Za-z0-9=+/]'", NULL};
-
- init_datum(&m);
- init_datum(&e);
- init_datum(&p);
- init_datum(&q);
- init_datum(&g);
- init_datum(&algolabel);
-
-
- /* figure out if we've got the right thing: */
- subkeycount = gnutls_openpgp_crt_get_subkey_count(*pgp_crt);
- if (subkeycount < 0) {
- err(0,"Could not determine subkey count (got value %d)\n", subkeycount);
- return 1;
- }
-
- if ((keyfpr == NULL) &&
- (subkeycount > 0)) {
- err(0,"No key identifier passed in, but there were %d keys to choose from\n", subkeycount + 1);
- return 1;
- }
-
- if (keyfpr != NULL) {
- ret = gnutls_openpgp_crt_get_fingerprint(*pgp_crt, fingerprint, &fingerprint_length);
- if (ret) {
- err(0,"Could not get key fingerprint (error: %d)\n", ret);
- return 1;
- }
- if (fprlen > fingerprint_length) {
- err(0, "Requested key identifier is longer than computed fingerprint\n");
- return 1;
- }
- if (fingerprint_length > fprlen) {
- err(0, "Only comparing last %d bits of key fingerprint\n", fprlen*8);
- }
- }
- if ((keyfpr == NULL) || (memcmp(fingerprint + (fingerprint_length - fprlen), keyfpr, fprlen) == 0)) {
- /* we want to export the primary key: */
- err(0,"exporting primary key\n");
-
- /* FIXME: this is almost identical to the block below for subkeys.
- This clumsiness seems inherent in the gnutls OpenPGP API,
- though. ugh. */
- algo = gnutls_openpgp_crt_get_pk_algorithm(*pgp_crt, &bits);
- if (algo < 0) {
- err(0,"failed to get the algorithm of the OpenPGP public key (error: %d)\n", algo);
- return algo;
- } else if (algo == GNUTLS_PK_RSA) {
- err(0,"OpenPGP RSA certificate, with %d bits\n", bits);
- ret = gnutls_openpgp_crt_get_pk_rsa_raw(*pgp_crt, &m, &e);
- if (GNUTLS_E_SUCCESS != ret) {
- err(0,"failed to export RSA certificate parameters (error: %d)\n", ret);
- return 1;
- }
- } else if (algo == GNUTLS_PK_DSA) {
- err(0,"OpenPGP DSA certificate, with %d bits\n", bits);
- ret = gnutls_openpgp_crt_get_pk_dsa_raw(*pgp_crt, &p, &q, &g, &y);
- if (GNUTLS_E_SUCCESS != ret) {
- err(0,"failed to export DSA certificate parameters (error: %d)\n", ret);
- return 1;
- }
- }
- found = 1;
-
- } else {
- /* lets trawl through the subkeys until we find the one we want: */
- for (subkeyidx = 0; (subkeyidx < subkeycount) && !found; subkeyidx++) {
- ret = gnutls_openpgp_crt_get_subkey_fingerprint(*pgp_crt, subkeyidx, fingerprint, &fingerprint_length);
- if (ret) {
- err(0,"Could not get fingerprint of subkey with index %d (error: %d)\n", subkeyidx, ret);
- return 1;
- }
- if (fprlen > fingerprint_length) {
- err(0, "Requested key identifier is longer than computed fingerprint\n");
- return 1;
- }
- if (fingerprint_length > fprlen) {
- err(1, "Only comparing last %d bits of key fingerprint\n", fprlen*8);
- }
- if (memcmp(fingerprint + (fingerprint_length - fprlen), keyfpr, fprlen) == 0) {
- err(0,"exporting subkey index %d\n", subkeyidx);
-
- /* FIXME: this is almost identical to the block above for the
- primary key. */
- algo = gnutls_openpgp_crt_get_subkey_pk_algorithm(*pgp_crt, subkeyidx, &bits);
- if (algo < 0) {
- err(0,"failed to get the algorithm of the OpenPGP public key (error: %d)\n", algo);
- return algo;
- } else if (algo == GNUTLS_PK_RSA) {
- err(0,"OpenPGP RSA certificate, with %d bits\n", bits);
- ret = gnutls_openpgp_crt_get_subkey_pk_rsa_raw(*pgp_crt, subkeyidx, &m, &e);
- if (GNUTLS_E_SUCCESS != ret) {
- err(0,"failed to export RSA certificate parameters (error: %d)\n", ret);
- return 1;
- }
- } else if (algo == GNUTLS_PK_DSA) {
- err(0,"OpenPGP DSA certificate, with %d bits\n", bits);
- ret = gnutls_openpgp_crt_get_subkey_pk_dsa_raw(*pgp_crt, subkeyidx, &p, &q, &g, &y);
- if (GNUTLS_E_SUCCESS != ret) {
- err(0,"failed to export DSA certificate parameters (error: %d)\n", ret);
- return 1;
- }
- }
- found = 1;
-
- }
- }
- }
-
- if (!found) {
- err(0,"Could not find key in input\n");
- return 1;
- }
-
- /* if we made it this far, we've got MPIs, and we've got the
- algorithm, so we just need to emit the info */
- 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(0,"Key algorithm was neither DSA nor RSA (it was %d). Can't deal. Sorry!\n", algo);
- return 1;
- }
-
- if (ret = datum_from_string(&algolabel, algoname), ret) {
- err(0,"couldn't label string (error: %d)\n", ret);
- return ret;
- }
-
- snprintf(output_data, sizeof(output_data), "%s ", algoname);
-
- pipefd = create_writing_pipe(&child_pid, b64args[0], b64args);
- if (pipefd < 0) {
- err(0,"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(0,"was not able to write out RSA key data\n");
- return 1;
- }
- close(pipefd);
- if (child_pid != waitpid(child_pid, &pipestatus, 0)) {
- err(0,"could not wait for child process to return for some reason.\n");
- return 1;
- }
- if (pipestatus != 0) {
- err(0,"base64 pipe died with return code %d\n", pipestatus);
- return pipestatus;
- }
-
- write(1, "\n", 1);
-
- return 0;
-}
-
-int main(int argc, char* argv[]) {
- gnutls_datum_t data;
- int ret = 0;
- gnutls_x509_privkey_t x509_privkey;
- gnutls_openpgp_privkey_t pgp_privkey;
- gnutls_openpgp_crt_t pgp_crt;
-
- char output_data[10240];
- size_t ods = sizeof(output_data);
-
- unsigned char * fingerprint = NULL;
- size_t fpr_size;
- char * prettyfpr = NULL;
-
- init_gnutls();
-
- /* figure out what key we should be looking for: */
- if (argv[1] != NULL) {
- if (strlen(argv[1]) > 81) {
- /* safety check to avoid some sort of wacky overflow situation:
- there's no reason that the key id should be longer than twice
- a sane fingerprint (one byte between chars, and then another
- two at the beginning and end) */
- err(0, "Key identifier is way too long. Please use at most 40 hex digits.\n");
- return 1;
- }
-
- fpr_size = hexstring2bin(NULL, argv[1]);
- if (fpr_size > 40*4) {
- err(0, "Key identifier is longer than 40 hex digits\n");
- return 1;
- }
- /* since fpr_size is initially in bits: */
- if (fpr_size % 8 != 0) {
- err(0, "Please provide an even number of hex digits for the key identifier\n");
- return 1;
- }
- fpr_size /= 8;
-
- fingerprint = malloc(sizeof(unsigned char) * fpr_size);
- bzero(fingerprint, sizeof(unsigned char) * fpr_size);
- hexstring2bin(fingerprint, argv[1]);
-
- prettyfpr = malloc(sizeof(unsigned char)*fpr_size*2 + 1);
- if (prettyfpr != NULL) {
- hex_print_data(prettyfpr, fingerprint, fpr_size);
- prettyfpr[sizeof(unsigned char)*fpr_size*2] = '\0';
- err(1, "searching for key with fingerprint '%s'\n", prettyfpr);
- free(prettyfpr);
- }
-
- if (fpr_size < 4) {
- err(0, "You MUST provide at least 8 hex digits in any key identifier\n");
- return 1;
- }
- if (fpr_size < 8)
- err(0, "You should provide at least 16 hex digits in any key identifier (proceeding with %d digits anyway)\n", fpr_size*2);
-
- }
-
-
- init_datum(&data);
-
- /* slurp in the key from stdin */
- if (ret = set_datum_fd(&data, 0), ret) {
- err(0,"didn't read file descriptor 0\n");
- return 1;
- }
-
-
- if (ret = gnutls_openpgp_privkey_init(&pgp_privkey), ret) {
- err(0,"Failed to initialized OpenPGP private key (error: %d)\n", ret);
- return 1;
- }
- /* check whether it's a private key or a public key, by trying them: */
- if ((gnutls_openpgp_privkey_import(pgp_privkey, &data, GNUTLS_OPENPGP_FMT_RAW, NULL, 0) == 0) ||
- (gnutls_openpgp_privkey_import(pgp_privkey, &data, GNUTLS_OPENPGP_FMT_BASE64, NULL, 0) == 0)) {
- /* we're dealing with a private key */
- err(0,"Translating private key\n");
- if (ret = gnutls_x509_privkey_init(&x509_privkey), ret) {
- err(0,"Failed to initialize X.509 private key for output (error: %d)\n", ret);
- return 1;
- }
-
- ret = convert_private_pgp_to_x509(&x509_privkey, &pgp_privkey, fingerprint, fpr_size);
-
- gnutls_openpgp_privkey_deinit(pgp_privkey);
- if (ret)
- return ret;
-
- ret = gnutls_x509_privkey_export (x509_privkey,
- GNUTLS_X509_FMT_PEM,
- output_data,
- &ods);
- if (ret == 0) {
- write(1, output_data, ods);
- }
- gnutls_x509_privkey_deinit(x509_privkey);
-
- } else {
- if (ret = gnutls_openpgp_crt_init(&pgp_crt), ret) {
- err(0,"Failed to initialized OpenPGP certificate (error: %d)\n", ret);
- return 1;
- }
-
- if ((gnutls_openpgp_crt_import(pgp_crt, &data, GNUTLS_OPENPGP_FMT_RAW) == 0) ||
- (gnutls_openpgp_crt_import(pgp_crt, &data, GNUTLS_OPENPGP_FMT_BASE64) == 0)) {
- /* we're dealing with a public key */
- err(0,"Translating public key\n");
-
- ret = emit_public_openssh_from_pgp(&pgp_crt, fingerprint, fpr_size);
- if (ret != 0)
- return ret;
-
- } else {
- /* we have no idea what kind of key this is at all anyway! */
- err(0,"Input does not contain any form of OpenPGP key I recognize.\n");
- return 1;
- }
- }
-
- gnutls_global_deinit();
- free(fingerprint);
- return 0;
-}
projects / monkeysphere.git / commitdiff