summaryrefslogtreecommitdiff
path: root/src/keytrans/gnutls-helpers.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/keytrans/gnutls-helpers.c')
-rw-r--r--src/keytrans/gnutls-helpers.c466
1 files changed, 0 insertions, 466 deletions
diff --git a/src/keytrans/gnutls-helpers.c b/src/keytrans/gnutls-helpers.c
deleted file mode 100644
index 8d8ec17..0000000
--- a/src/keytrans/gnutls-helpers.c
+++ /dev/null
@@ -1,466 +0,0 @@
-/* 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;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-28 16:31:16 +0000