diff options
Diffstat (limited to '')
| -rw-r--r-- | key2root-addkey.c | 116 |
1 files changed, 50 insertions, 66 deletions
diff --git a/key2root-addkey.c b/key2root-addkey.c index 989aa8f..cbb1d0e 100644 --- a/key2root-addkey.c +++ b/key2root-addkey.c @@ -1,6 +1,4 @@ /* See LICENSE file for copyright and license details. */ -#include <sys/auxv.h> -#include <sys/mman.h> #include <sys/stat.h> #include <errno.h> #include <fcntl.h> @@ -11,6 +9,7 @@ #include <unistd.h> #include "arg.h" +#include "crypt.h" char *argv0; @@ -19,7 +18,7 @@ char *argv0; static void usage(void) { - fprintf(stderr, "usage: %s [-r] user key-name [crypt-parameters]\n", argv0); + fprintf(stderr, "usage: %s [-r] (user key-name [crypt-parameters] | -h user key-name key-hash)\n", argv0); exit(1); } @@ -119,27 +118,6 @@ loadandlocate(size_t *beginning_out, size_t *end_out, int fd, char **datap, size } -static char * -mksalt(char *p) -{ - uintptr_t rdata_addr; - char *rdata; - size_t i; - - rdata_addr = (uintptr_t)getauxval(AT_RANDOM); /* address to 16 random bytes */ - rdata = (void *)rdata_addr; - if (!rdata) { - fprintf(stderr, "%s: getauxval AT_RANDOM: %s\n", argv0, strerror(errno)); - exit(1); - } - - for (i = 0; i < 16; i++) - *p++ = "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM0123456789./"[*rdata++ & 63]; - - return p; -} - - int main(int argc, char *argv[]) { @@ -153,6 +131,7 @@ main(int argc, char *argv[]) size_t beginning = 0; size_t end = 0; int allow_replace = 0; + int add_hash = 0; int failed = 0; int fd; char *key = NULL, *new; @@ -161,12 +140,13 @@ main(int argc, char *argv[]) char *hash; size_t gap_size; size_t gap_increase; -#define HASH_PREFIX "$6$" - char generated_parameters[sizeof(HASH_PREFIX"$") + 16]; ssize_t r; size_t i; ARGBEGIN { + case 'h': + add_hash = 1; + break; case 'r': allow_replace = 1; break; @@ -189,60 +169,64 @@ main(int argc, char *argv[]) fprintf(stderr, "%s: bad key name specified: %s, includes whitespace\n", argv0, keyname); failed = 1; } - if (isatty(STDIN_FILENO)) { + if (!add_hash && isatty(STDIN_FILENO)) { fprintf(stderr, "%s: standard input must not be a TTY.\n", argv0); failed = 1; } if (failed) return 1; - if (mlockall(MCL_CURRENT | MCL_FUTURE)) - fprintf(stderr, "%s: mlockall MCL_CURRENT|MCL_FUTURE: %s\n", argv0, strerror(errno)); - - if (!parameters) { - stpcpy(mksalt(stpcpy(generated_parameters, HASH_PREFIX)), "$"); - parameters = generated_parameters; - } - - for (;;) { - if (key_len == key_size) { - new = malloc(1 + (key_size += 1024)); - if (!new) { + if (add_hash) { + for (i = 0; parameters[i]; i++) { + if (parameters[i] <= ' ' || parameters[i] >= 127) { + fprintf(stderr, "%s: key-hash may only contain printable ASCII characters\n", argv0); + exit(1); + } + } + key_size = key_len = strlen(keyname) + strlen(parameters) + 2; + key = malloc(key_len + 1); + if (!key) { + fprintf(stderr, "%s: malloc: %s\n", argv0, strerror(errno)); + exit(1); + } + stpcpy(stpcpy(stpcpy(stpcpy(key, keyname), " "), parameters), "\n"); + } else { + for (;;) { + if (key_len == key_size) { + new = malloc(1 + (key_size += 1024)); + if (!new) { + explicit_bzero(key, key_len); + fprintf(stderr, "%s: read <stdin>: %s\n", argv0, strerror(errno)); + exit(1); + } + memcpy(new, key, key_len); + explicit_bzero(key, key_len); + free(key); + key = new; + } + r = read(STDIN_FILENO, &key[key_len], key_size - key_len); + if (r <= 0) { + if (!r) + break; explicit_bzero(key, key_len); fprintf(stderr, "%s: read <stdin>: %s\n", argv0, strerror(errno)); exit(1); } - memcpy(new, key, key_len); - explicit_bzero(key, key_len); - free(key); - key = new; + key_len += (size_t)r; } - r = read(STDIN_FILENO, &key[key_len], key_size - key_len); - if (r <= 0) { - if (!r) - break; - explicit_bzero(key, key_len); - fprintf(stderr, "%s: read <stdin>: %s\n", argv0, strerror(errno)); + hash = key2root_crypt(key, key_len, parameters, 1); + if (!hash) + exit(1); + free(key); + key_size = key_len = strlen(keyname) + strlen(hash) + 2; + key = malloc(key_len + 1); + if (!key) { + fprintf(stderr, "%s: malloc: %s\n", argv0, strerror(errno)); exit(1); } - key_len += (size_t)r; - } - for (i = 0; i < key_len; i++) - if (!key[i]) - key[i] = (char)255; - key[key_len] = '\0'; - hash = crypt(key, parameters); - if (!hash) - fprintf(stderr, "%s: crypt <key> %s: %s\n", argv0, parameters, strerror(errno)); - explicit_bzero(key, key_len); - free(key); - key_size = key_len = strlen(keyname) + strlen(hash) + 2; - key = malloc(key_len + 1); - if (!key) { - fprintf(stderr, "%s: malloc: %s\n", argv0, strerror(errno)); - exit(1); + stpcpy(stpcpy(stpcpy(stpcpy(key, keyname), " "), hash), "\n"); + free(hash); } - stpcpy(stpcpy(stpcpy(stpcpy(key, keyname), " "), hash), "\n"); path = malloc(sizeof(KEYPATH"/") + strlen(user)); if (!path) { |