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author | Steve Langasek <steve.langasek@ubuntu.com> | 2019-01-03 12:48:14 -0800 |
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committer | Steve Langasek <steve.langasek@ubuntu.com> | 2019-01-03 12:48:14 -0800 |
commit | d5b06b67bbeeed7c05c0eb2e05d6a972ad050d1c (patch) | |
tree | ba5654cffacfd2002eefc5bc3764a7971afff1dc /Linux-PAM/modules/pam_pwdb/bigcrypt.-c | |
parent | 4c51da22e068907adb7857d50f5109a467c94d7c (diff) | |
parent | 7cbfa335c57d068d59508c844f3957165cccfb9b (diff) | |
download | pam-d5b06b67bbeeed7c05c0eb2e05d6a972ad050d1c.tar.gz pam-d5b06b67bbeeed7c05c0eb2e05d6a972ad050d1c.tar.bz2 pam-d5b06b67bbeeed7c05c0eb2e05d6a972ad050d1c.zip |
New upstream version 0.99.7.1
Diffstat (limited to 'Linux-PAM/modules/pam_pwdb/bigcrypt.-c')
-rw-r--r-- | Linux-PAM/modules/pam_pwdb/bigcrypt.-c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/Linux-PAM/modules/pam_pwdb/bigcrypt.-c b/Linux-PAM/modules/pam_pwdb/bigcrypt.-c deleted file mode 100644 index 321f2491..00000000 --- a/Linux-PAM/modules/pam_pwdb/bigcrypt.-c +++ /dev/null @@ -1,114 +0,0 @@ -/* - * This function implements the "bigcrypt" algorithm specifically for - * Linux-PAM. - * - * This algorithm is algorithm 0 (default) shipped with the C2 secure - * implementation of Digital UNIX. - * - * Disclaimer: This work is not based on the source code to Digital - * UNIX, nor am I connected to Digital Equipment Corp, in any way - * other than as a customer. This code is based on published - * interfaces and reasonable guesswork. - * - * Description: The cleartext is divided into blocks of SEGMENT_SIZE=8 - * characters or less. Each block is encrypted using the standard UNIX - * libc crypt function. The result of the encryption for one block - * provides the salt for the suceeding block. - * - * Restrictions: The buffer used to hold the encrypted result is - * statically allocated. (see MAX_PASS_LEN below). This is necessary, - * as the returned pointer points to "static data that are overwritten - * by each call", (XPG3: XSI System Interface + Headers pg 109), and - * this is a drop in replacement for crypt(); - * - * Andy Phillips <atp@mssl.ucl.ac.uk> - */ - -/* - * Max cleartext password length in segments of 8 characters this - * function can deal with (16 segments of 8 chars= max 128 character - * password). - */ - -#define MAX_PASS_LEN 16 -#define SEGMENT_SIZE 8 -#define SALT_SIZE 2 -#define KEYBUF_SIZE ((MAX_PASS_LEN*SEGMENT_SIZE)+SALT_SIZE) -#define ESEGMENT_SIZE 11 -#define CBUF_SIZE ((MAX_PASS_LEN*ESEGMENT_SIZE)+SALT_SIZE+1) - -static char *bigcrypt(const char *key, const char *salt) -{ - static char dec_c2_cryptbuf[CBUF_SIZE]; /* static storage area */ - - unsigned long int keylen,n_seg,j; - char *cipher_ptr,*plaintext_ptr,*tmp_ptr,*salt_ptr; - char keybuf[KEYBUF_SIZE+1]; - - D(("called with key='%s', salt='%s'.", key, salt)); - - /* reset arrays */ - memset(keybuf, 0, KEYBUF_SIZE+1); - memset(dec_c2_cryptbuf, 0, CBUF_SIZE); - - /* fill KEYBUF_SIZE with key */ - strncpy(keybuf, key, KEYBUF_SIZE); - - /* deal with case that we are doing a password check for a - conventially encrypted password: the salt will be - SALT_SIZE+ESEGMENT_SIZE long. */ - if (strlen(salt) == (SALT_SIZE+ESEGMENT_SIZE)) - keybuf[SEGMENT_SIZE] = '\0'; /* terminate password early(?) */ - - keylen = strlen(keybuf); - - if (!keylen) { - n_seg = 1; - } else { - /* work out how many segments */ - n_seg = 1 + ((keylen-1)/SEGMENT_SIZE); - } - - if (n_seg > MAX_PASS_LEN) - n_seg = MAX_PASS_LEN; /* truncate at max length */ - - /* set up some pointers */ - cipher_ptr = dec_c2_cryptbuf; - plaintext_ptr = keybuf; - - /* do the first block with supplied salt */ - tmp_ptr = crypt(plaintext_ptr,salt); /* libc crypt() */ - - /* and place in the static area */ - strncpy(cipher_ptr, tmp_ptr, 13); - cipher_ptr += ESEGMENT_SIZE + SALT_SIZE; - plaintext_ptr += SEGMENT_SIZE; /* first block of SEGMENT_SIZE */ - - /* change the salt (1st 2 chars of previous block) - this was found - by dowsing */ - - salt_ptr = cipher_ptr - ESEGMENT_SIZE; - - /* so far this is identical to "return crypt(key, salt);", if - there is more than one block encrypt them... */ - - if (n_seg > 1) { - for (j=2; j <= n_seg; j++) { - - tmp_ptr = crypt(plaintext_ptr, salt_ptr); - - /* skip the salt for seg!=0 */ - strncpy(cipher_ptr, (tmp_ptr+SALT_SIZE), ESEGMENT_SIZE); - - cipher_ptr += ESEGMENT_SIZE; - plaintext_ptr += SEGMENT_SIZE; - salt_ptr = cipher_ptr - ESEGMENT_SIZE; - } - } - - D(("key=|%s|, salt=|%s|\nbuf=|%s|\n", key, salt, dec_c2_cryptbuf)); - - /* this is the <NUL> terminated encrypted password */ - - return dec_c2_cryptbuf; -} |