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Diffstat (limited to 'secure/lib/libcrypt/crypt-blowfish.c')
| -rw-r--r-- | secure/lib/libcrypt/crypt-blowfish.c | 307 |
1 files changed, 0 insertions, 307 deletions
diff --git a/secure/lib/libcrypt/crypt-blowfish.c b/secure/lib/libcrypt/crypt-blowfish.c deleted file mode 100644 index 649d07cb30fd..000000000000 --- a/secure/lib/libcrypt/crypt-blowfish.c +++ /dev/null @@ -1,307 +0,0 @@ -/* - * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Niels Provos. - * 4. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -/* This password hashing algorithm was designed by David Mazieres - * <dm@lcs.mit.edu> and works as follows: - * - * 1. state := InitState () - * 2. state := ExpandKey (state, salt, password) 3. - * REPEAT rounds: - * state := ExpandKey (state, 0, salt) - * state := ExpandKey(state, 0, password) - * 4. ctext := "OrpheanBeholderScryDoubt" - * 5. REPEAT 64: - * ctext := Encrypt_ECB (state, ctext); - * 6. RETURN Concatenate (salt, ctext); - * - */ - -/* - * FreeBSD implementation by Paul Herman <pherman@frenchfries.net> - */ - -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <string.h> -#include <pwd.h> -#include "blowfish.h" -#include "crypt.h" - -/* This implementation is adaptable to current computing power. - * You can have up to 2^31 rounds which should be enough for some - * time to come. - */ - -#define BCRYPT_VERSION '2' -#define BCRYPT_MAXSALT 16 /* Precomputation is just so nice */ -#define BCRYPT_BLOCKS 6 /* Ciphertext blocks */ -#define BCRYPT_MINROUNDS 16 /* we have log2(rounds) in salt */ - -static void encode_base64(u_int8_t *, u_int8_t *, u_int16_t); -static void decode_base64(u_int8_t *, u_int16_t, const u_int8_t *); - -static char encrypted[_PASSWORD_LEN]; -static char error[] = ":"; - -static const u_int8_t Base64Code[] = -"./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; - -static const u_int8_t index_64[128] = -{ - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 0, 1, 54, 55, - 56, 57, 58, 59, 60, 61, 62, 63, 255, 255, - 255, 255, 255, 255, 255, 2, 3, 4, 5, 6, - 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, - 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, - 255, 255, 255, 255, 255, 255, 28, 29, 30, - 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, - 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, - 51, 52, 53, 255, 255, 255, 255, 255 -}; -#define CHAR64(c) ( (c) > 127 ? 255 : index_64[(c)]) - -static void -decode_base64(u_int8_t *buffer, u_int16_t len, const u_int8_t *data) -{ - u_int8_t *bp = buffer; - const u_int8_t *p = data; - u_int8_t c1, c2, c3, c4; - while (bp < buffer + len) { - c1 = CHAR64(*p); - c2 = CHAR64(*(p + 1)); - - /* Invalid data */ - if (c1 == 255 || c2 == 255) - break; - - *bp++ = (u_int8_t)((c1 << 2) | ((c2 & 0x30) >> 4)); - if (bp >= buffer + len) - break; - - c3 = CHAR64(*(p + 2)); - if (c3 == 255) - break; - - *bp++ = ((c2 & 0x0f) << 4) | ((c3 & 0x3c) >> 2); - if (bp >= buffer + len) - break; - - c4 = CHAR64(*(p + 3)); - if (c4 == 255) - break; - *bp++ = ((c3 & 0x03) << 6) | c4; - - p += 4; - } -} - -/* We handle $Vers$log2(NumRounds)$salt+passwd$ - i.e. $2$04$iwouldntknowwhattosayetKdJ6iFtacBqJdKe6aW7ou */ - -char * -crypt_blowfish(const char *key, const char *salt) -{ - blf_ctx state; - u_int32_t rounds, i, k; - u_int16_t j; - u_int8_t key_len, salt_len, logr, minr; - u_int8_t ciphertext[4 * BCRYPT_BLOCKS] = "OrpheanBeholderScryDoubt"; - u_int8_t csalt[BCRYPT_MAXSALT]; - u_int32_t cdata[BCRYPT_BLOCKS]; - static const char *magic = "$2a$04$"; - - /* Defaults */ - minr = 'a'; - logr = 4; - rounds = 1 << logr; - - /* If it starts with the magic string, then skip that */ - if(!strncmp(salt, magic, strlen(magic))) { - salt += strlen(magic); - } - else if (*salt == '$') { - - /* Discard "$" identifier */ - salt++; - - if (*salt > BCRYPT_VERSION) { - /* How do I handle errors ? Return ':' */ - return error; - } - - /* Check for minor versions */ - if (salt[1] != '$') { - switch (salt[1]) { - case 'a': - /* 'ab' should not yield the same as 'abab' */ - minr = (u_int8_t)salt[1]; - salt++; - break; - default: - return error; - } - } else - minr = 0; - - /* Discard version + "$" identifier */ - salt += 2; - - if (salt[2] != '$') - /* Out of sync with passwd entry */ - return error; - - /* Computer power doesnt increase linear, 2^x should be fine */ - logr = (u_int8_t)atoi(salt); - rounds = 1 << logr; - if (rounds < BCRYPT_MINROUNDS) - return error; - - /* Discard num rounds + "$" identifier */ - salt += 3; - } - - - /* We dont want the base64 salt but the raw data */ - decode_base64(csalt, BCRYPT_MAXSALT, (const u_int8_t *)salt); - salt_len = BCRYPT_MAXSALT; - key_len = (u_int8_t)(strlen(key) + (minr >= 'a' ? 1 : 0)); - - /* Setting up S-Boxes and Subkeys */ - Blowfish_initstate(&state); - Blowfish_expandstate(&state, csalt, salt_len, - (const u_int8_t *) key, key_len); - for (k = 0; k < rounds; k++) { - Blowfish_expand0state(&state, (const u_int8_t *) key, key_len); - Blowfish_expand0state(&state, csalt, salt_len); - } - - /* This can be precomputed later */ - j = 0; - for (i = 0; i < BCRYPT_BLOCKS; i++) - cdata[i] = Blowfish_stream2word(ciphertext, 4 * BCRYPT_BLOCKS, &j); - - /* Now do the encryption */ - for (k = 0; k < 64; k++) - blf_enc(&state, cdata, BCRYPT_BLOCKS / 2); - - for (i = 0; i < BCRYPT_BLOCKS; i++) { - ciphertext[4 * i + 3] = cdata[i] & 0xff; - cdata[i] = cdata[i] >> 8; - ciphertext[4 * i + 2] = cdata[i] & 0xff; - cdata[i] = cdata[i] >> 8; - ciphertext[4 * i + 1] = cdata[i] & 0xff; - cdata[i] = cdata[i] >> 8; - ciphertext[4 * i + 0] = cdata[i] & 0xff; - } - - - i = 0; - encrypted[i++] = '$'; - encrypted[i++] = BCRYPT_VERSION; - if (minr) - encrypted[i++] = (int8_t)minr; - encrypted[i++] = '$'; - - snprintf(encrypted + i, 4, "%2.2u$", logr); - - encode_base64((u_int8_t *) encrypted + i + 3, csalt, BCRYPT_MAXSALT); - encode_base64((u_int8_t *) encrypted + strlen(encrypted), ciphertext, - 4 * BCRYPT_BLOCKS - 1); - return encrypted; -} - -static void -encode_base64(u_int8_t *buffer, u_int8_t *data, u_int16_t len) -{ - u_int8_t *bp = buffer; - u_int8_t *p = data; - u_int8_t c1, c2; - while (p < data + len) { - c1 = *p++; - *bp++ = Base64Code[(c1 >> 2)]; - c1 = (c1 & 0x03) << 4; - if (p >= data + len) { - *bp++ = Base64Code[c1]; - break; - } - c2 = *p++; - c1 |= (c2 >> 4) & 0x0f; - *bp++ = Base64Code[c1]; - c1 = (c2 & 0x0f) << 2; - if (p >= data + len) { - *bp++ = Base64Code[c1]; - break; - } - c2 = *p++; - c1 |= (c2 >> 6) & 0x03; - *bp++ = Base64Code[c1]; - *bp++ = Base64Code[c2 & 0x3f]; - } - *bp = '\0'; -} - -#if 0 -void -main() -{ - char blubber[73]; - char salt[100]; - char *p; - salt[0] = '$'; - salt[1] = BCRYPT_VERSION; - salt[2] = '$'; - - snprintf(salt + 3, 4, "%2.2u$", 5); - - printf("24 bytes of salt: "); - fgets(salt + 6, 94, stdin); - salt[99] = 0; - printf("72 bytes of password: "); - fpurge(stdin); - fgets(blubber, 73, stdin); - blubber[72] = 0; - - p = crypt(blubber, salt); - printf("Passwd entry: %s\n\n", p); - - p = bcrypt_gensalt(5); - printf("Generated salt: %s\n", p); - p = crypt(blubber, p); - printf("Passwd entry: %s\n", p); -} -#endif |