/* $NetBSD: cryptosoft_xform.c,v 1.30 2020/06/30 04:14:55 riastradh Exp $ */ /* $FreeBSD: src/sys/opencrypto/xform.c,v 1.1.2.1 2002/11/21 23:34:23 sam Exp $ */ /* $OpenBSD: xform.c,v 1.19 2002/08/16 22:47:25 dhartmei 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 __KERNEL_RCSID(1, "$NetBSD: cryptosoft_xform.c,v 1.30 2020/06/30 04:14:55 riastradh Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct swcr_auth_hash { const struct auth_hash *auth_hash; int ctxsize; void (*Init)(void *); void (*Setkey)(void *, const uint8_t *, uint16_t); void (*Reinit)(void *, const uint8_t *, uint16_t); int (*Update)(void *, const uint8_t *, uint16_t); void (*Final)(uint8_t *, void *); }; struct swcr_enc_xform { const struct enc_xform *enc_xform; void (*encrypt)(void *, uint8_t *); void (*decrypt)(void *, uint8_t *); int (*setkey)(uint8_t **, const uint8_t *, int); void (*zerokey)(uint8_t **); void (*reinit)(void *, const uint8_t *, uint8_t *); }; struct swcr_comp_algo { const struct comp_algo *unused_comp_algo; uint32_t (*compress)(uint8_t *, uint32_t, uint8_t **); uint32_t (*decompress)(uint8_t *, uint32_t, uint8_t **, int); }; static void null_encrypt(void *, u_int8_t *); static void null_decrypt(void *, u_int8_t *); static int null_setkey(u_int8_t **, const u_int8_t *, int); static void null_zerokey(u_int8_t **); static int des1_setkey(u_int8_t **, const u_int8_t *, int); static int des3_setkey(u_int8_t **, const u_int8_t *, int); static int blf_setkey(u_int8_t **, const u_int8_t *, int); static int cast5_setkey(u_int8_t **, const u_int8_t *, int); static int skipjack_setkey(u_int8_t **, const u_int8_t *, int); static int aes_setkey(u_int8_t **, const u_int8_t *, int); static int cml_setkey(u_int8_t **, const u_int8_t *, int); static int aes_ctr_setkey(u_int8_t **, const u_int8_t *, int); static int aes_gmac_setkey(u_int8_t **, const u_int8_t *, int); static void des1_encrypt(void *, u_int8_t *); static void des3_encrypt(void *, u_int8_t *); static void blf_encrypt(void *, u_int8_t *); static void cast5_encrypt(void *, u_int8_t *); static void skipjack_encrypt(void *, u_int8_t *); static void aes_encrypt(void *, u_int8_t *); static void cml_encrypt(void *, u_int8_t *); static void des1_decrypt(void *, u_int8_t *); static void des3_decrypt(void *, u_int8_t *); static void blf_decrypt(void *, u_int8_t *); static void cast5_decrypt(void *, u_int8_t *); static void skipjack_decrypt(void *, u_int8_t *); static void aes_decrypt(void *, u_int8_t *); static void cml_decrypt(void *, u_int8_t *); static void aes_ctr_crypt(void *, u_int8_t *); static void des1_zerokey(u_int8_t **); static void des3_zerokey(u_int8_t **); static void blf_zerokey(u_int8_t **); static void cast5_zerokey(u_int8_t **); static void skipjack_zerokey(u_int8_t **); static void aes_zerokey(u_int8_t **); static void cml_zerokey(u_int8_t **); static void aes_ctr_zerokey(u_int8_t **); static void aes_gmac_zerokey(u_int8_t **); static void aes_ctr_reinit(void *, const u_int8_t *, u_int8_t *); static void aes_gcm_reinit(void *, const u_int8_t *, u_int8_t *); static void aes_gmac_reinit(void *, const u_int8_t *, u_int8_t *); static void null_init(void *); static int null_update(void *, const u_int8_t *, u_int16_t); static void null_final(u_int8_t *, void *); static int MD5Update_int(void *, const u_int8_t *, u_int16_t); static void SHA1Init_int(void *); static int SHA1Update_int(void *, const u_int8_t *, u_int16_t); static void SHA1Final_int(u_int8_t *, void *); static int RMD160Update_int(void *, const u_int8_t *, u_int16_t); static int SHA1Update_int(void *, const u_int8_t *, u_int16_t); static void SHA1Final_int(u_int8_t *, void *); static int RMD160Update_int(void *, const u_int8_t *, u_int16_t); static int SHA256Update_int(void *, const u_int8_t *, u_int16_t); static int SHA384Update_int(void *, const u_int8_t *, u_int16_t); static int SHA512Update_int(void *, const u_int8_t *, u_int16_t); static u_int32_t deflate_compress(u_int8_t *, u_int32_t, u_int8_t **); static u_int32_t deflate_decompress(u_int8_t *, u_int32_t, u_int8_t **, int); static u_int32_t gzip_compress(u_int8_t *, u_int32_t, u_int8_t **); static u_int32_t gzip_decompress(u_int8_t *, u_int32_t, u_int8_t **, int); /* Encryption instances */ static const struct swcr_enc_xform swcr_enc_xform_null = { &enc_xform_null, null_encrypt, null_decrypt, null_setkey, null_zerokey, NULL }; static const struct swcr_enc_xform swcr_enc_xform_des = { &enc_xform_des, des1_encrypt, des1_decrypt, des1_setkey, des1_zerokey, NULL }; static const struct swcr_enc_xform swcr_enc_xform_3des = { &enc_xform_3des, des3_encrypt, des3_decrypt, des3_setkey, des3_zerokey, NULL }; static const struct swcr_enc_xform swcr_enc_xform_blf = { &enc_xform_blf, blf_encrypt, blf_decrypt, blf_setkey, blf_zerokey, NULL }; static const struct swcr_enc_xform swcr_enc_xform_cast5 = { &enc_xform_cast5, cast5_encrypt, cast5_decrypt, cast5_setkey, cast5_zerokey, NULL }; static const struct swcr_enc_xform swcr_enc_xform_skipjack = { &enc_xform_skipjack, skipjack_encrypt, skipjack_decrypt, skipjack_setkey, skipjack_zerokey, NULL }; static const struct swcr_enc_xform swcr_enc_xform_aes = { &enc_xform_aes, aes_encrypt, aes_decrypt, aes_setkey, aes_zerokey, NULL }; static const struct swcr_enc_xform swcr_enc_xform_aes_ctr = { &enc_xform_aes_ctr, aes_ctr_crypt, aes_ctr_crypt, aes_ctr_setkey, aes_ctr_zerokey, aes_ctr_reinit }; static const struct swcr_enc_xform swcr_enc_xform_aes_gcm = { &enc_xform_aes_gcm, aes_ctr_crypt, aes_ctr_crypt, aes_ctr_setkey, aes_ctr_zerokey, aes_gcm_reinit }; static const struct swcr_enc_xform swcr_enc_xform_aes_gmac = { &enc_xform_aes_gmac, NULL, NULL, aes_gmac_setkey, aes_gmac_zerokey, aes_gmac_reinit }; static const struct swcr_enc_xform swcr_enc_xform_camellia = { &enc_xform_camellia, cml_encrypt, cml_decrypt, cml_setkey, cml_zerokey, NULL }; /* Authentication instances */ static const struct swcr_auth_hash swcr_auth_hash_null = { &auth_hash_null, sizeof(int), /* NB: context isn't used */ null_init, NULL, NULL, null_update, null_final }; static const struct swcr_auth_hash swcr_auth_hash_hmac_md5 = { &auth_hash_hmac_md5, sizeof(MD5_CTX), (void (*) (void *)) MD5Init, NULL, NULL, MD5Update_int, (void (*) (u_int8_t *, void *)) MD5Final }; static const struct swcr_auth_hash swcr_auth_hash_hmac_sha1 = { &auth_hash_hmac_sha1, sizeof(SHA1_CTX), SHA1Init_int, NULL, NULL, SHA1Update_int, SHA1Final_int }; static const struct swcr_auth_hash swcr_auth_hash_hmac_ripemd_160 = { &auth_hash_hmac_ripemd_160, sizeof(RMD160_CTX), (void (*)(void *)) RMD160Init, NULL, NULL, RMD160Update_int, (void (*)(u_int8_t *, void *)) RMD160Final }; static const struct swcr_auth_hash swcr_auth_hash_hmac_md5_96 = { &auth_hash_hmac_md5_96, sizeof(MD5_CTX), (void (*) (void *)) MD5Init, NULL, NULL, MD5Update_int, (void (*) (u_int8_t *, void *)) MD5Final }; static const struct swcr_auth_hash swcr_auth_hash_hmac_sha1_96 = { &auth_hash_hmac_sha1_96, sizeof(SHA1_CTX), SHA1Init_int, NULL, NULL, SHA1Update_int, SHA1Final_int }; static const struct swcr_auth_hash swcr_auth_hash_hmac_ripemd_160_96 = { &auth_hash_hmac_ripemd_160_96, sizeof(RMD160_CTX), (void (*)(void *)) RMD160Init, NULL, NULL, RMD160Update_int, (void (*)(u_int8_t *, void *)) RMD160Final }; static const struct swcr_auth_hash swcr_auth_hash_key_md5 = { &auth_hash_key_md5, sizeof(MD5_CTX), (void (*)(void *)) MD5Init, NULL, NULL, MD5Update_int, (void (*)(u_int8_t *, void *)) MD5Final }; static const struct swcr_auth_hash swcr_auth_hash_key_sha1 = { &auth_hash_key_sha1, sizeof(SHA1_CTX), SHA1Init_int, NULL, NULL, SHA1Update_int, SHA1Final_int }; static const struct swcr_auth_hash swcr_auth_hash_md5 = { &auth_hash_md5, sizeof(MD5_CTX), (void (*) (void *)) MD5Init, NULL, NULL, MD5Update_int, (void (*) (u_int8_t *, void *)) MD5Final }; static const struct swcr_auth_hash swcr_auth_hash_sha1 = { &auth_hash_sha1, sizeof(SHA1_CTX), (void (*)(void *)) SHA1Init, NULL, NULL, SHA1Update_int, (void (*)(u_int8_t *, void *)) SHA1Final }; static const struct swcr_auth_hash swcr_auth_hash_hmac_sha2_256 = { &auth_hash_hmac_sha2_256, sizeof(SHA256_CTX), (void (*)(void *))(void *)SHA256_Init, NULL, NULL, SHA256Update_int, (void (*)(u_int8_t *, void *))(void *)SHA256_Final }; static const struct swcr_auth_hash swcr_auth_hash_hmac_sha2_384 = { &auth_hash_hmac_sha2_384, sizeof(SHA384_CTX), (void (*)(void *))(void *)SHA384_Init, NULL, NULL, SHA384Update_int, (void (*)(u_int8_t *, void *))(void *)SHA384_Final }; static const struct swcr_auth_hash swcr_auth_hash_hmac_sha2_512 = { &auth_hash_hmac_sha2_512, sizeof(SHA512_CTX), (void (*)(void *))(void *)SHA512_Init, NULL, NULL, SHA512Update_int, (void (*)(u_int8_t *, void *))(void *)SHA512_Final }; static const struct swcr_auth_hash swcr_auth_hash_aes_xcbc_mac = { &auth_hash_aes_xcbc_mac_96, sizeof(aesxcbc_ctx), null_init, (void (*)(void *, const u_int8_t *, u_int16_t))(void *)aes_xcbc_mac_init, NULL, aes_xcbc_mac_loop, aes_xcbc_mac_result }; static const struct swcr_auth_hash swcr_auth_hash_gmac_aes_128 = { &auth_hash_gmac_aes_128, sizeof(AES_GMAC_CTX), (void (*)(void *))AES_GMAC_Init, (void (*)(void *, const u_int8_t *, u_int16_t))AES_GMAC_Setkey, (void (*)(void *, const u_int8_t *, u_int16_t))AES_GMAC_Reinit, (int (*)(void *, const u_int8_t *, u_int16_t))AES_GMAC_Update, (void (*)(u_int8_t *, void *))AES_GMAC_Final }; static const struct swcr_auth_hash swcr_auth_hash_gmac_aes_192 = { &auth_hash_gmac_aes_192, sizeof(AES_GMAC_CTX), (void (*)(void *))AES_GMAC_Init, (void (*)(void *, const u_int8_t *, u_int16_t))AES_GMAC_Setkey, (void (*)(void *, const u_int8_t *, u_int16_t))AES_GMAC_Reinit, (int (*)(void *, const u_int8_t *, u_int16_t))AES_GMAC_Update, (void (*)(u_int8_t *, void *))AES_GMAC_Final }; static const struct swcr_auth_hash swcr_auth_hash_gmac_aes_256 = { &auth_hash_gmac_aes_256, sizeof(AES_GMAC_CTX), (void (*)(void *))AES_GMAC_Init, (void (*)(void *, const u_int8_t *, u_int16_t))AES_GMAC_Setkey, (void (*)(void *, const u_int8_t *, u_int16_t))AES_GMAC_Reinit, (int (*)(void *, const u_int8_t *, u_int16_t))AES_GMAC_Update, (void (*)(u_int8_t *, void *))AES_GMAC_Final }; /* Compression instance */ static const struct swcr_comp_algo swcr_comp_algo_deflate = { &comp_algo_deflate, deflate_compress, deflate_decompress }; static const struct swcr_comp_algo swcr_comp_algo_deflate_nogrow = { &comp_algo_deflate_nogrow, deflate_compress, deflate_decompress }; static const struct swcr_comp_algo swcr_comp_algo_gzip = { &comp_algo_deflate, gzip_compress, gzip_decompress }; /* * Encryption wrapper routines. */ static void null_encrypt(void *key, u_int8_t *blk) { } static void null_decrypt(void *key, u_int8_t *blk) { } static int null_setkey(u_int8_t **sched, const u_int8_t *key, int len) { *sched = NULL; return 0; } static void null_zerokey(u_int8_t **sched) { *sched = NULL; } static void des1_encrypt(void *key, u_int8_t *blk) { des_cblock *cb = (des_cblock *) blk; des_key_schedule *p = (des_key_schedule *) key; des_ecb_encrypt(cb, cb, p[0], DES_ENCRYPT); } static void des1_decrypt(void *key, u_int8_t *blk) { des_cblock *cb = (des_cblock *) blk; des_key_schedule *p = (des_key_schedule *) key; des_ecb_encrypt(cb, cb, p[0], DES_DECRYPT); } static int des1_setkey(u_int8_t **sched, const u_int8_t *key, int len) { des_key_schedule *p; p = malloc(sizeof (des_key_schedule), M_CRYPTO_DATA, M_NOWAIT|M_ZERO); *sched = (u_int8_t *) p; if (p == NULL) return ENOMEM; des_set_key((des_cblock *)__UNCONST(key), p[0]); return 0; } static void des1_zerokey(u_int8_t **sched) { memset(*sched, 0, sizeof (des_key_schedule)); free(*sched, M_CRYPTO_DATA); *sched = NULL; } static void des3_encrypt(void *key, u_int8_t *blk) { des_cblock *cb = (des_cblock *) blk; des_key_schedule *p = (des_key_schedule *) key; des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_ENCRYPT); } static void des3_decrypt(void *key, u_int8_t *blk) { des_cblock *cb = (des_cblock *) blk; des_key_schedule *p = (des_key_schedule *) key; des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_DECRYPT); } static int des3_setkey(u_int8_t **sched, const u_int8_t *key, int len) { des_key_schedule *p; p = malloc(3*sizeof (des_key_schedule), M_CRYPTO_DATA, M_NOWAIT|M_ZERO); *sched = (u_int8_t *) p; if (p == NULL) return ENOMEM; des_set_key((des_cblock *)__UNCONST(key + 0), p[0]); des_set_key((des_cblock *)__UNCONST(key + 8), p[1]); des_set_key((des_cblock *)__UNCONST(key + 16), p[2]); return 0; } static void des3_zerokey(u_int8_t **sched) { memset(*sched, 0, 3*sizeof (des_key_schedule)); free(*sched, M_CRYPTO_DATA); *sched = NULL; } static void blf_encrypt(void *key, u_int8_t *blk) { BF_ecb_encrypt(blk, blk, (BF_KEY *)key, 1); } static void blf_decrypt(void *key, u_int8_t *blk) { BF_ecb_encrypt(blk, blk, (BF_KEY *)key, 0); } static int blf_setkey(u_int8_t **sched, const u_int8_t *key, int len) { *sched = malloc(sizeof(BF_KEY), M_CRYPTO_DATA, M_NOWAIT|M_ZERO); if (*sched == NULL) return ENOMEM; BF_set_key((BF_KEY *) *sched, len, key); return 0; } static void blf_zerokey(u_int8_t **sched) { memset(*sched, 0, sizeof(BF_KEY)); free(*sched, M_CRYPTO_DATA); *sched = NULL; } static void cast5_encrypt(void *key, u_int8_t *blk) { cast128_encrypt((cast128_key *) key, blk, blk); } static void cast5_decrypt(void *key, u_int8_t *blk) { cast128_decrypt((cast128_key *) key, blk, blk); } static int cast5_setkey(u_int8_t **sched, const u_int8_t *key, int len) { *sched = malloc(sizeof(cast128_key), M_CRYPTO_DATA, M_NOWAIT|M_ZERO); if (*sched == NULL) return ENOMEM; cast128_setkey((cast128_key *)*sched, key, len); return 0; } static void cast5_zerokey(u_int8_t **sched) { memset(*sched, 0, sizeof(cast128_key)); free(*sched, M_CRYPTO_DATA); *sched = NULL; } static void skipjack_encrypt(void *key, u_int8_t *blk) { skipjack_forwards(blk, blk, (u_int8_t **) key); } static void skipjack_decrypt(void *key, u_int8_t *blk) { skipjack_backwards(blk, blk, (u_int8_t **) key); } static int skipjack_setkey(u_int8_t **sched, const u_int8_t *key, int len) { /* NB: allocate all the memory that's needed at once */ /* XXX assumes bytes are aligned on sizeof(u_char) == 1 boundaries. * Will this break a pdp-10, Cray-1, or GE-645 port? */ *sched = malloc(10 * (sizeof(u_int8_t *) + 0x100), M_CRYPTO_DATA, M_NOWAIT|M_ZERO); if (*sched == NULL) return ENOMEM; u_int8_t** key_tables = (u_int8_t**) *sched; u_int8_t* table = (u_int8_t*) &key_tables[10]; int k; for (k = 0; k < 10; k++) { key_tables[k] = table; table += 0x100; } subkey_table_gen(key, (u_int8_t **) *sched); return 0; } static void skipjack_zerokey(u_int8_t **sched) { memset(*sched, 0, 10 * (sizeof(u_int8_t *) + 0x100)); free(*sched, M_CRYPTO_DATA); *sched = NULL; } struct aes_ctx { struct aesenc enc; struct aesdec dec; uint32_t nr; }; static void aes_encrypt(void *key, u_int8_t *blk) { struct aes_ctx *ctx = key; aes_enc(&ctx->enc, blk, blk, ctx->nr); } static void aes_decrypt(void *key, u_int8_t *blk) { struct aes_ctx *ctx = key; aes_dec(&ctx->dec, blk, blk, ctx->nr); } static int aes_setkey(u_int8_t **sched, const u_int8_t *key, int len) { struct aes_ctx *ctx; if (len != 16 && len != 24 && len != 32) return EINVAL; ctx = kmem_zalloc(sizeof(*ctx), KM_NOSLEEP); if (ctx == NULL) return ENOMEM; switch (len) { case 16: aes_setenckey128(&ctx->enc, key); aes_setdeckey128(&ctx->dec, key); ctx->nr = AES_128_NROUNDS; break; case 24: aes_setenckey192(&ctx->enc, key); aes_setdeckey192(&ctx->dec, key); ctx->nr = AES_192_NROUNDS; break; case 32: aes_setenckey256(&ctx->enc, key); aes_setdeckey256(&ctx->dec, key); ctx->nr = AES_256_NROUNDS; break; } *sched = (void *)ctx; return 0; } static void aes_zerokey(u_int8_t **sched) { struct aes_ctx *ctx = (void *)*sched; explicit_memset(ctx, 0, sizeof(*ctx)); kmem_free(ctx, sizeof(*ctx)); *sched = NULL; } static void cml_encrypt(void *key, u_int8_t *blk) { camellia_encrypt(key, blk, blk); } static void cml_decrypt(void *key, u_int8_t *blk) { camellia_decrypt(key, blk, blk); } static int cml_setkey(u_int8_t **sched, const u_int8_t *key, int len) { if (len != 16 && len != 24 && len != 32) return (EINVAL); *sched = malloc(sizeof(camellia_ctx), M_CRYPTO_DATA, M_NOWAIT|M_ZERO); if (*sched == NULL) return ENOMEM; camellia_set_key((camellia_ctx *) *sched, key, len * 8); return 0; } static void cml_zerokey(u_int8_t **sched) { memset(*sched, 0, sizeof(camellia_ctx)); free(*sched, M_CRYPTO_DATA); *sched = NULL; } #define AESCTR_NONCESIZE 4 #define AESCTR_IVSIZE 8 #define AESCTR_BLOCKSIZE 16 struct aes_ctr_ctx { /* need only encryption half */ struct aesenc ac_ek; u_int8_t ac_block[AESCTR_BLOCKSIZE]; int ac_nr; struct { u_int64_t lastiv; } ivgenctx; }; static void aes_ctr_crypt(void *key, u_int8_t *blk) { struct aes_ctr_ctx *ctx; u_int8_t keystream[AESCTR_BLOCKSIZE]; int i; ctx = key; /* increment counter */ for (i = AESCTR_BLOCKSIZE - 1; i >= AESCTR_NONCESIZE + AESCTR_IVSIZE; i--) if (++ctx->ac_block[i]) /* continue on overflow */ break; aes_enc(&ctx->ac_ek, ctx->ac_block, keystream, ctx->ac_nr); for (i = 0; i < AESCTR_BLOCKSIZE; i++) blk[i] ^= keystream[i]; explicit_memset(keystream, 0, sizeof(keystream)); } int aes_ctr_setkey(u_int8_t **sched, const u_int8_t *key, int len) { struct aes_ctr_ctx *ctx; if (len < AESCTR_NONCESIZE) return EINVAL; ctx = kmem_zalloc(sizeof(*ctx), KM_NOSLEEP); if (!ctx) return ENOMEM; switch (len) { case 16 + AESCTR_NONCESIZE: ctx->ac_nr = aes_setenckey128(&ctx->ac_ek, key); break; case 24 + AESCTR_NONCESIZE: ctx->ac_nr = aes_setenckey192(&ctx->ac_ek, key); break; case 32 + AESCTR_NONCESIZE: ctx->ac_nr = aes_setenckey256(&ctx->ac_ek, key); break; default: aes_ctr_zerokey((u_int8_t **)&ctx); return EINVAL; } memcpy(ctx->ac_block, key + len - AESCTR_NONCESIZE, AESCTR_NONCESIZE); /* random start value for simple counter */ cprng_fast(&ctx->ivgenctx.lastiv, sizeof(ctx->ivgenctx.lastiv)); *sched = (void *)ctx; return 0; } void aes_ctr_zerokey(u_int8_t **sched) { struct aes_ctr_ctx *ctx = (void *)*sched; explicit_memset(ctx, 0, sizeof(*ctx)); kmem_free(ctx, sizeof(*ctx)); *sched = NULL; } void aes_ctr_reinit(void *key, const u_int8_t *iv, u_int8_t *ivout) { struct aes_ctr_ctx *ctx = key; if (!iv) { ctx->ivgenctx.lastiv++; iv = (const u_int8_t *)&ctx->ivgenctx.lastiv; } if (ivout) memcpy(ivout, iv, AESCTR_IVSIZE); memcpy(ctx->ac_block + AESCTR_NONCESIZE, iv, AESCTR_IVSIZE); /* reset counter */ memset(ctx->ac_block + AESCTR_NONCESIZE + AESCTR_IVSIZE, 0, 4); } void aes_gcm_reinit(void *key, const u_int8_t *iv, u_int8_t *ivout) { struct aes_ctr_ctx *ctx = key; if (!iv) { ctx->ivgenctx.lastiv++; iv = (const u_int8_t *)&ctx->ivgenctx.lastiv; } if (ivout) memcpy(ivout, iv, AESCTR_IVSIZE); memcpy(ctx->ac_block + AESCTR_NONCESIZE, iv, AESCTR_IVSIZE); /* reset counter */ memset(ctx->ac_block + AESCTR_NONCESIZE + AESCTR_IVSIZE, 0, 4); ctx->ac_block[AESCTR_BLOCKSIZE - 1] = 1; /* GCM starts with 1 */ } struct aes_gmac_ctx { struct { u_int64_t lastiv; } ivgenctx; }; int aes_gmac_setkey(u_int8_t **sched, const u_int8_t *key, int len) { struct aes_gmac_ctx *ctx; ctx = kmem_zalloc(sizeof(*ctx), KM_NOSLEEP); if (!ctx) return ENOMEM; /* random start value for simple counter */ cprng_fast(&ctx->ivgenctx.lastiv, sizeof(ctx->ivgenctx.lastiv)); *sched = (void *)ctx; return 0; } void aes_gmac_zerokey(u_int8_t **sched) { struct aes_gmac_ctx *ctx = (void *)*sched; kmem_free(ctx, sizeof(*ctx)); *sched = NULL; } void aes_gmac_reinit(void *key, const u_int8_t *iv, u_int8_t *ivout) { struct aes_gmac_ctx *ctx = key; if (!iv) { ctx->ivgenctx.lastiv++; iv = (const u_int8_t *)&ctx->ivgenctx.lastiv; } if (ivout) memcpy(ivout, iv, AESCTR_IVSIZE); } /* * And now for auth. */ static void null_init(void *ctx) { } static int null_update(void *ctx, const u_int8_t *buf, u_int16_t len) { return 0; } static void null_final(u_int8_t *buf, void *ctx) { if (buf != (u_int8_t *) 0) memset(buf, 0, 12); } static int RMD160Update_int(void *ctx, const u_int8_t *buf, u_int16_t len) { RMD160Update(ctx, buf, len); return 0; } static int MD5Update_int(void *ctx, const u_int8_t *buf, u_int16_t len) { MD5Update(ctx, buf, len); return 0; } static void SHA1Init_int(void *ctx) { SHA1Init(ctx); } static int SHA1Update_int(void *ctx, const u_int8_t *buf, u_int16_t len) { SHA1Update(ctx, buf, len); return 0; } static void SHA1Final_int(u_int8_t *blk, void *ctx) { SHA1Final(blk, ctx); } static int SHA256Update_int(void *ctx, const u_int8_t *buf, u_int16_t len) { SHA256_Update(ctx, buf, len); return 0; } static int SHA384Update_int(void *ctx, const u_int8_t *buf, u_int16_t len) { SHA384_Update(ctx, buf, len); return 0; } static int SHA512Update_int(void *ctx, const u_int8_t *buf, u_int16_t len) { SHA512_Update(ctx, buf, len); return 0; } /* * And compression */ static u_int32_t deflate_compress(u_int8_t *data, u_int32_t size, u_int8_t **out) { return deflate_global(data, size, 0, out, 0); } static u_int32_t deflate_decompress(u_int8_t *data, u_int32_t size, u_int8_t **out, int size_hint) { return deflate_global(data, size, 1, out, size_hint); } static u_int32_t gzip_compress(u_int8_t *data, u_int32_t size, u_int8_t **out) { return gzip_global(data, size, 0, out, 0); } static u_int32_t gzip_decompress(u_int8_t *data, u_int32_t size, u_int8_t **out, int size_hint) { return gzip_global(data, size, 1, out, size_hint); }