/* $OpenBSD: xform.c,v 1.20 2002/11/12 18:23:13 jason Exp $ */ /* * The authors of this code are John Ioannidis (ji@tla.org), * Angelos D. Keromytis (kermit@csd.uch.gr) and * Niels Provos (provos@physnet.uni-hamburg.de). * * This code was written by John Ioannidis for BSD/OS in Athens, Greece, * in November 1995. * * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, * by Angelos D. Keromytis. * * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis * and Niels Provos. * * Additional features in 1999 by Angelos D. Keromytis. * * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis, * Angelos D. Keromytis and Niels Provos. * * Copyright (C) 2001, Angelos D. Keromytis. * * Permission to use, copy, and modify this software with or without fee * is hereby granted, provided that this entire notice is included in * all copies of any software which is or includes a copy or * modification of this software. * You may use this code under the GNU public license if you so wish. Please * contribute changes back to the authors under this freer than GPL license * so that we may further the use of strong encryption without limitations to * all. * * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR * PURPOSE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern void des_ecb3_encrypt(caddr_t, caddr_t, caddr_t, caddr_t, caddr_t, int); extern void des_ecb_encrypt(caddr_t, caddr_t, caddr_t, int); void des_set_key(caddr_t, caddr_t); void des1_setkey(u_int8_t **, u_int8_t *, int); void des3_setkey(u_int8_t **, u_int8_t *, int); void blf_setkey(u_int8_t **, u_int8_t *, int); void cast5_setkey(u_int8_t **, u_int8_t *, int); void skipjack_setkey(u_int8_t **, u_int8_t *, int); void rijndael128_setkey(u_int8_t **, u_int8_t *, int); void des1_encrypt(caddr_t, u_int8_t *); void des3_encrypt(caddr_t, u_int8_t *); void blf_encrypt(caddr_t, u_int8_t *); void cast5_encrypt(caddr_t, u_int8_t *); void skipjack_encrypt(caddr_t, u_int8_t *); void rijndael128_encrypt(caddr_t, u_int8_t *); void des1_decrypt(caddr_t, u_int8_t *); void des3_decrypt(caddr_t, u_int8_t *); void blf_decrypt(caddr_t, u_int8_t *); void cast5_decrypt(caddr_t, u_int8_t *); void skipjack_decrypt(caddr_t, u_int8_t *); void rijndael128_decrypt(caddr_t, u_int8_t *); void des1_zerokey(u_int8_t **); void des3_zerokey(u_int8_t **); void blf_zerokey(u_int8_t **); void cast5_zerokey(u_int8_t **); void skipjack_zerokey(u_int8_t **); void rijndael128_zerokey(u_int8_t **); void null_encrypt(caddr_t, u_int8_t *); void null_zerokey(u_int8_t **); void null_setkey(u_int8_t **, u_int8_t *, int); void null_decrypt(caddr_t, u_int8_t *); int MD5Update_int(void *, u_int8_t *, u_int16_t); int SHA1Update_int(void *, u_int8_t *, u_int16_t); int RMD160Update_int(void *, u_int8_t *, u_int16_t); u_int32_t deflate_compress(u_int8_t *, u_int32_t, u_int8_t **); u_int32_t deflate_decompress(u_int8_t *, u_int32_t, u_int8_t **); /* Encryption instances */ struct enc_xform enc_xform_des = { CRYPTO_DES_CBC, "DES", 8, 8, 8, des1_encrypt, des1_decrypt, des1_setkey, des1_zerokey, }; struct enc_xform enc_xform_3des = { CRYPTO_3DES_CBC, "3DES", 8, 24, 24, des3_encrypt, des3_decrypt, des3_setkey, des3_zerokey }; struct enc_xform enc_xform_blf = { CRYPTO_BLF_CBC, "Blowfish", 8, 5, 56 /* 448 bits, max key */, blf_encrypt, blf_decrypt, blf_setkey, blf_zerokey }; struct enc_xform enc_xform_cast5 = { CRYPTO_CAST_CBC, "CAST-128", 8, 5, 16, cast5_encrypt, cast5_decrypt, cast5_setkey, cast5_zerokey }; struct enc_xform enc_xform_skipjack = { CRYPTO_SKIPJACK_CBC, "Skipjack", 8, 10, 10, skipjack_encrypt, skipjack_decrypt, skipjack_setkey, skipjack_zerokey }; struct enc_xform enc_xform_rijndael128 = { CRYPTO_RIJNDAEL128_CBC, "Rijndael-128/AES", 16, 8, 32, rijndael128_encrypt, rijndael128_decrypt, rijndael128_setkey, rijndael128_zerokey, }; struct enc_xform enc_xform_arc4 = { CRYPTO_ARC4, "ARC4", 1, 1, 32, NULL, NULL, NULL, NULL, }; struct enc_xform enc_xform_null = { CRYPTO_NULL, "NULL", 8, 24, 24, null_encrypt, null_decrypt, null_setkey, null_zerokey, }; /* Authentication instances */ struct auth_hash auth_hash_hmac_md5_96 = { CRYPTO_MD5_HMAC, "HMAC-MD5", 16, 16, 12, sizeof(MD5_CTX), (void (*) (void *)) MD5Init, MD5Update_int, (void (*) (u_int8_t *, void *)) MD5Final }; struct auth_hash auth_hash_hmac_sha1_96 = { CRYPTO_SHA1_HMAC, "HMAC-SHA1", 20, 20, 12, sizeof(SHA1_CTX), (void (*) (void *)) SHA1Init, SHA1Update_int, (void (*) (u_int8_t *, void *)) SHA1Final }; struct auth_hash auth_hash_hmac_ripemd_160_96 = { CRYPTO_RIPEMD160_HMAC, "HMAC-RIPEMD-160", 20, 20, 12, sizeof(RMD160_CTX), (void (*)(void *)) RMD160Init, RMD160Update_int, (void (*)(u_int8_t *, void *)) RMD160Final }; struct auth_hash auth_hash_key_md5 = { CRYPTO_MD5_KPDK, "Keyed MD5", 0, 16, 16, sizeof(MD5_CTX), (void (*)(void *)) MD5Init, MD5Update_int, (void (*)(u_int8_t *, void *)) MD5Final }; struct auth_hash auth_hash_key_sha1 = { CRYPTO_SHA1_KPDK, "Keyed SHA1", 0, 20, 20, sizeof(SHA1_CTX), (void (*)(void *)) SHA1Init, SHA1Update_int, (void (*)(u_int8_t *, void *)) SHA1Final }; struct auth_hash auth_hash_md5 = { CRYPTO_MD5, "MD5", 0, 16, 16, sizeof(MD5_CTX), (void (*) (void *)) MD5Init, MD5Update_int, (void (*) (u_int8_t *, void *)) MD5Final }; struct auth_hash auth_hash_sha1 = { CRYPTO_SHA1, "SHA1", 0, 20, 20, sizeof(SHA1_CTX), (void (*)(void *)) SHA1Init, SHA1Update_int, (void (*)(u_int8_t *, void *)) SHA1Final }; /* Compression instance */ struct comp_algo comp_algo_deflate = { CRYPTO_DEFLATE_COMP, "Deflate", 90, deflate_compress, deflate_decompress }; /* * Encryption wrapper routines. */ void des1_encrypt(caddr_t key, u_int8_t *blk) { des_ecb_encrypt(blk, blk, key, 1); } void des1_decrypt(caddr_t key, u_int8_t *blk) { des_ecb_encrypt(blk, blk, key, 0); } void des1_setkey(u_int8_t **sched, u_int8_t *key, int len) { MALLOC(*sched, u_int8_t *, 128, M_CRYPTO_DATA, M_WAITOK); bzero(*sched, 128); des_set_key(key, *sched); } void des1_zerokey(u_int8_t **sched) { bzero(*sched, 128); FREE(*sched, M_CRYPTO_DATA); *sched = NULL; } void des3_encrypt(caddr_t key, u_int8_t *blk) { des_ecb3_encrypt(blk, blk, key, key + 128, key + 256, 1); } void des3_decrypt(caddr_t key, u_int8_t *blk) { des_ecb3_encrypt(blk, blk, key + 256, key + 128, key, 0); } void des3_setkey(u_int8_t **sched, u_int8_t *key, int len) { MALLOC(*sched, u_int8_t *, 384, M_CRYPTO_DATA, M_WAITOK); bzero(*sched, 384); des_set_key(key, *sched); des_set_key(key + 8, *sched + 128); des_set_key(key + 16, *sched + 256); } void des3_zerokey(u_int8_t **sched) { bzero(*sched, 384); FREE(*sched, M_CRYPTO_DATA); *sched = NULL; } void blf_encrypt(caddr_t key, u_int8_t *blk) { blf_ecb_encrypt((blf_ctx *) key, blk, 8); } void blf_decrypt(caddr_t key, u_int8_t *blk) { blf_ecb_decrypt((blf_ctx *) key, blk, 8); } void blf_setkey(u_int8_t **sched, u_int8_t *key, int len) { MALLOC(*sched, u_int8_t *, sizeof(blf_ctx), M_CRYPTO_DATA, M_WAITOK); bzero(*sched, sizeof(blf_ctx)); blf_key((blf_ctx *)*sched, key, len); } void blf_zerokey(u_int8_t **sched) { bzero(*sched, sizeof(blf_ctx)); FREE(*sched, M_CRYPTO_DATA); *sched = NULL; } void null_setkey(u_int8_t **sched, u_int8_t *key, int len) { } void null_zerokey(u_int8_t **sched) { } void null_encrypt(caddr_t key, u_int8_t *blk) { } void null_decrypt(caddr_t key, u_int8_t *blk) { } void cast5_encrypt(caddr_t key, u_int8_t *blk) { cast_encrypt((cast_key *) key, blk, blk); } void cast5_decrypt(caddr_t key, u_int8_t *blk) { cast_decrypt((cast_key *) key, blk, blk); } void cast5_setkey(u_int8_t **sched, u_int8_t *key, int len) { MALLOC(*sched, u_int8_t *, sizeof(cast_key), M_CRYPTO_DATA, M_WAITOK); bzero(*sched, sizeof(cast_key)); cast_setkey((cast_key *)*sched, key, len); } void cast5_zerokey(u_int8_t **sched) { bzero(*sched, sizeof(cast_key)); FREE(*sched, M_CRYPTO_DATA); *sched = NULL; } void skipjack_encrypt(caddr_t key, u_int8_t *blk) { skipjack_forwards(blk, blk, (u_int8_t **) key); } void skipjack_decrypt(caddr_t key, u_int8_t *blk) { skipjack_backwards(blk, blk, (u_int8_t **) key); } void skipjack_setkey(u_int8_t **sched, u_int8_t *key, int len) { MALLOC(*sched, u_int8_t *, 10 * sizeof(u_int8_t *), M_CRYPTO_DATA, M_WAITOK); bzero(*sched, 10 * sizeof(u_int8_t *)); subkey_table_gen(key, (u_int8_t **) *sched); } void skipjack_zerokey(u_int8_t **sched) { int k; for (k = 0; k < 10; k++) { if (((u_int8_t **)(*sched))[k]) { bzero(((u_int8_t **)(*sched))[k], 0x100); FREE(((u_int8_t **)(*sched))[k], M_CRYPTO_DATA); } } bzero(*sched, 10 * sizeof(u_int8_t *)); FREE(*sched, M_CRYPTO_DATA); *sched = NULL; } void rijndael128_encrypt(caddr_t key, u_int8_t *blk) { rijndael_encrypt((rijndael_ctx *) key, (u_char *) blk, (u_char *) blk); } void rijndael128_decrypt(caddr_t key, u_int8_t *blk) { rijndael_decrypt(((rijndael_ctx *) key) + 1, (u_char *) blk, (u_char *) blk); } void rijndael128_setkey(u_int8_t **sched, u_int8_t *key, int len) { MALLOC(*sched, u_int8_t *, 2 * sizeof(rijndael_ctx), M_CRYPTO_DATA, M_WAITOK); bzero(*sched, 2 * sizeof(rijndael_ctx)); rijndael_set_key((rijndael_ctx *) *sched, (u_char *) key, len * 8, 1); rijndael_set_key(((rijndael_ctx *) *sched) + 1, (u_char *) key, len * 8, 0); } void rijndael128_zerokey(u_int8_t **sched) { bzero(*sched, 2 * sizeof(rijndael_ctx)); FREE(*sched, M_CRYPTO_DATA); *sched = NULL; } /* * And now for auth. */ int RMD160Update_int(void *ctx, u_int8_t *buf, u_int16_t len) { RMD160Update(ctx, buf, len); return 0; } int MD5Update_int(void *ctx, u_int8_t *buf, u_int16_t len) { MD5Update(ctx, buf, len); return 0; } int SHA1Update_int(void *ctx, u_int8_t *buf, u_int16_t len) { SHA1Update(ctx, buf, len); return 0; } /* * And compression */ u_int32_t deflate_compress(data, size, out) u_int8_t *data; u_int32_t size; u_int8_t **out; { return deflate_global(data, size, 0, out); } u_int32_t deflate_decompress(data, size, out) u_int8_t *data; u_int32_t size; u_int8_t **out; { return deflate_global(data, size, 1, out); }