diff options
Diffstat (limited to 'libcrypt/des.c')
| -rw-r--r-- | libcrypt/des.c | 85 |
1 files changed, 49 insertions, 36 deletions
diff --git a/libcrypt/des.c b/libcrypt/des.c index 2febd4c74..1981890f8 100644 --- a/libcrypt/des.c +++ b/libcrypt/des.c @@ -60,30 +60,54 @@ #include <string.h> #include <crypt.h> -static u_char ascii64[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; +/* Re-entrantify me -- all this junk needs to be in + * struct crypt_data to make this really reentrant... */ +static u_char inv_key_perm[64]; +static u_char inv_comp_perm[56]; +static u_char u_sbox[8][64]; +static u_char u_key_perm[56]; +static u_char un_pbox[32]; +static u_int32_t en_keysl[16], en_keysr[16]; +static u_int32_t de_keysl[16], de_keysr[16]; +static u_int32_t ip_maskl[8][256], ip_maskr[8][256]; +static u_int32_t fp_maskl[8][256], fp_maskr[8][256]; +static u_int32_t key_perm_maskl[8][128], key_perm_maskr[8][128]; +static u_int32_t comp_maskl[8][128], comp_maskr[8][128]; +static u_int32_t saltbits; + + +/* Static stuff that stays resident and doesn't change after + * being initialized, and therefore doesn't need to be made + * reentrant. */ +static u_char init_perm[64], final_perm[64]; +static u_char m_sbox[4][4096]; +static u_int32_t psbox[4][256]; + + + -static u_char IP[64] = { +/* A pile of data */ +static const u_char ascii64[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; + +static const u_char IP[64] = { 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8, 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3, 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7 }; -static u_char inv_key_perm[64]; -static u_char u_key_perm[56]; -static u_char key_perm[56] = { +static const u_char key_perm[56] = { 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36, 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4 }; -static u_char key_shifts[16] = { +static const u_char key_shifts[16] = { 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 }; -static u_char inv_comp_perm[56]; -static u_char comp_perm[48] = { +static const u_char comp_perm[48] = { 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10, 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2, 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48, @@ -94,8 +118,7 @@ static u_char comp_perm[48] = { * No E box is used, as it's replaced by some ANDs, shifts, and ORs. */ -static u_char u_sbox[8][64]; -static u_char sbox[8][64] = { +static const u_char sbox[8][64] = { { 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7, 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8, @@ -146,13 +169,12 @@ static u_char sbox[8][64] = { } }; -static u_char un_pbox[32]; -static u_char pbox[32] = { +static const u_char pbox[32] = { 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10, 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25 }; -static u_int32_t bits32[32] = +static const u_int32_t bits32[32] = { 0x80000000, 0x40000000, 0x20000000, 0x10000000, 0x08000000, 0x04000000, 0x02000000, 0x01000000, @@ -164,22 +186,10 @@ static u_int32_t bits32[32] = 0x00000008, 0x00000004, 0x00000002, 0x00000001 }; -static u_char bits8[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }; +static const u_char bits8[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }; +static const u_int32_t *bits28, *bits24; + -static u_int32_t saltbits; -static int32_t old_salt; -static u_int32_t *bits28, *bits24; -static u_char init_perm[64], final_perm[64]; -static u_int32_t en_keysl[16], en_keysr[16]; -static u_int32_t de_keysl[16], de_keysr[16]; -static int des_initialised = 0; -static u_char m_sbox[4][4096]; -static u_int32_t psbox[4][256]; -static u_int32_t ip_maskl[8][256], ip_maskr[8][256]; -static u_int32_t fp_maskl[8][256], fp_maskr[8][256]; -static u_int32_t key_perm_maskl[8][128], key_perm_maskr[8][128]; -static u_int32_t comp_maskl[8][128], comp_maskr[8][128]; -static u_int32_t old_rawkey0, old_rawkey1; static __inline int ascii_to_bin(char ch) { @@ -202,10 +212,12 @@ static void des_init(void) { int i, j, b, k, inbit, obit; u_int32_t *p, *il, *ir, *fl, *fr; + static int des_initialised = 0; + + if (des_initialised==1) + return; - old_rawkey0 = old_rawkey1 = 0; saltbits = 0; - old_salt = 0; bits24 = (bits28 = bits32 + 4) + 4; /* @@ -331,6 +343,7 @@ static void setup_salt(int32_t salt) { u_int32_t obit, saltbit; int i; + static int32_t old_salt = 0; if (salt == old_salt) return; @@ -473,6 +486,9 @@ static int des_setkey_r(const char *key, struct crypt_data *data) { u_int32_t k0, k1, rawkey0, rawkey1; int shifts, round; + static u_int32_t old_rawkey0=0, old_rawkey1=0; + + #if 0 u_int32_t *en_keysl = &(data->key[0]); u_int32_t *en_keysr = &(data->key[16]); @@ -480,8 +496,7 @@ static int des_setkey_r(const char *key, struct crypt_data *data) u_int32_t *de_keysr = &(data->key[48]); #endif - if (!des_initialised) - des_init(); + des_init(); rawkey0 = ntohl(*(u_int32_t *) key); rawkey1 = ntohl(*(u_int32_t *) (key + 4)); @@ -577,8 +592,7 @@ static int __des_encrypt_r(char *block, int flag, struct crypt_data *data) u_char *p; int i, j, retval; - if (!des_initialised) - des_init(); + des_init(); setup_salt((int32_t)0); p = (u_char *)block; @@ -604,8 +618,7 @@ extern char *__des_crypt_r(const char *key, const char *setting, struct crypt_da * should do nicely for now... */ char *output = data->key.b_data; - if (!des_initialised) - des_init(); + des_init(); /* * Copy the key, shifting each character up by one bit |