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crypto/chacha20poly1305.c
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/* * ChaCha20-Poly1305 AEAD, RFC7539 * * Copyright (C) 2015 Martin Willi * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include <crypto/internal/aead.h> #include <crypto/internal/hash.h> #include <crypto/internal/skcipher.h> #include <crypto/scatterwalk.h> |
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#include <crypto/chacha20.h> |
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#include <crypto/poly1305.h> |
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#include <linux/err.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include "internal.h" |
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#define CHACHAPOLY_IV_SIZE 12 struct chachapoly_instance_ctx { struct crypto_skcipher_spawn chacha; struct crypto_ahash_spawn poly; unsigned int saltlen; }; struct chachapoly_ctx { |
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struct crypto_skcipher *chacha; |
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struct crypto_ahash *poly; /* key bytes we use for the ChaCha20 IV */ unsigned int saltlen; u8 salt[]; }; struct poly_req { /* zero byte padding for AD/ciphertext, as needed */ u8 pad[POLY1305_BLOCK_SIZE]; /* tail data with AD/ciphertext lengths */ struct { __le64 assoclen; __le64 cryptlen; } tail; struct scatterlist src[1]; struct ahash_request req; /* must be last member */ }; struct chacha_req { |
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u8 iv[CHACHA20_IV_SIZE]; struct scatterlist src[1]; |
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struct skcipher_request req; /* must be last member */ |
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}; struct chachapoly_req_ctx { |
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struct scatterlist src[2]; struct scatterlist dst[2]; |
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/* the key we generate for Poly1305 using Chacha20 */ u8 key[POLY1305_KEY_SIZE]; |
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/* calculated Poly1305 tag */ u8 tag[POLY1305_DIGEST_SIZE]; /* length of data to en/decrypt, without ICV */ unsigned int cryptlen; |
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/* Actual AD, excluding IV */ unsigned int assoclen; |
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union { struct poly_req poly; struct chacha_req chacha; } u; }; static inline void async_done_continue(struct aead_request *req, int err, int (*cont)(struct aead_request *)) { if (!err) err = cont(req); if (err != -EINPROGRESS && err != -EBUSY) aead_request_complete(req, err); } static void chacha_iv(u8 *iv, struct aead_request *req, u32 icb) { struct chachapoly_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); __le32 leicb = cpu_to_le32(icb); memcpy(iv, &leicb, sizeof(leicb)); memcpy(iv + sizeof(leicb), ctx->salt, ctx->saltlen); memcpy(iv + sizeof(leicb) + ctx->saltlen, req->iv, CHACHA20_IV_SIZE - sizeof(leicb) - ctx->saltlen); } static int poly_verify_tag(struct aead_request *req) { struct chachapoly_req_ctx *rctx = aead_request_ctx(req); u8 tag[sizeof(rctx->tag)]; |
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scatterwalk_map_and_copy(tag, req->src, req->assoclen + rctx->cryptlen, sizeof(tag), 0); |
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if (crypto_memneq(tag, rctx->tag, sizeof(tag))) return -EBADMSG; return 0; } static int poly_copy_tag(struct aead_request *req) { struct chachapoly_req_ctx *rctx = aead_request_ctx(req); |
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scatterwalk_map_and_copy(rctx->tag, req->dst, req->assoclen + rctx->cryptlen, |
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sizeof(rctx->tag), 1); return 0; } static void chacha_decrypt_done(struct crypto_async_request *areq, int err) { async_done_continue(areq->data, err, poly_verify_tag); } static int chacha_decrypt(struct aead_request *req) { struct chachapoly_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); struct chachapoly_req_ctx *rctx = aead_request_ctx(req); struct chacha_req *creq = &rctx->u.chacha; |
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struct scatterlist *src, *dst; |
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int err; |
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if (rctx->cryptlen == 0) goto skip; |
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chacha_iv(creq->iv, req, 1); |
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sg_init_table(rctx->src, 2); src = scatterwalk_ffwd(rctx->src, req->src, req->assoclen); dst = src; if (req->src != req->dst) { sg_init_table(rctx->dst, 2); dst = scatterwalk_ffwd(rctx->dst, req->dst, req->assoclen); } |
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skcipher_request_set_callback(&creq->req, aead_request_flags(req), chacha_decrypt_done, req); skcipher_request_set_tfm(&creq->req, ctx->chacha); skcipher_request_set_crypt(&creq->req, src, dst, rctx->cryptlen, creq->iv); err = crypto_skcipher_decrypt(&creq->req); |
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if (err) return err; |
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skip: |
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return poly_verify_tag(req); } static int poly_tail_continue(struct aead_request *req) { struct chachapoly_req_ctx *rctx = aead_request_ctx(req); if (rctx->cryptlen == req->cryptlen) /* encrypting */ return poly_copy_tag(req); return chacha_decrypt(req); } static void poly_tail_done(struct crypto_async_request *areq, int err) { async_done_continue(areq->data, err, poly_tail_continue); } static int poly_tail(struct aead_request *req) { |
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struct crypto_aead *tfm = crypto_aead_reqtfm(req); struct chachapoly_ctx *ctx = crypto_aead_ctx(tfm); |
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struct chachapoly_req_ctx *rctx = aead_request_ctx(req); struct poly_req *preq = &rctx->u.poly; __le64 len; int err; sg_init_table(preq->src, 1); |
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len = cpu_to_le64(rctx->assoclen); |
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memcpy(&preq->tail.assoclen, &len, sizeof(len)); len = cpu_to_le64(rctx->cryptlen); memcpy(&preq->tail.cryptlen, &len, sizeof(len)); sg_set_buf(preq->src, &preq->tail, sizeof(preq->tail)); ahash_request_set_callback(&preq->req, aead_request_flags(req), poly_tail_done, req); ahash_request_set_tfm(&preq->req, ctx->poly); ahash_request_set_crypt(&preq->req, preq->src, rctx->tag, sizeof(preq->tail)); err = crypto_ahash_finup(&preq->req); if (err) return err; return poly_tail_continue(req); } static void poly_cipherpad_done(struct crypto_async_request *areq, int err) { async_done_continue(areq->data, err, poly_tail); } static int poly_cipherpad(struct aead_request *req) { struct chachapoly_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); struct chachapoly_req_ctx *rctx = aead_request_ctx(req); struct poly_req *preq = &rctx->u.poly; unsigned int padlen, bs = POLY1305_BLOCK_SIZE; int err; padlen = (bs - (rctx->cryptlen % bs)) % bs; memset(preq->pad, 0, sizeof(preq->pad)); sg_init_table(preq->src, 1); sg_set_buf(preq->src, &preq->pad, padlen); ahash_request_set_callback(&preq->req, aead_request_flags(req), poly_cipherpad_done, req); ahash_request_set_tfm(&preq->req, ctx->poly); ahash_request_set_crypt(&preq->req, preq->src, NULL, padlen); err = crypto_ahash_update(&preq->req); if (err) return err; return poly_tail(req); } static void poly_cipher_done(struct crypto_async_request *areq, int err) { async_done_continue(areq->data, err, poly_cipherpad); } static int poly_cipher(struct aead_request *req) { struct chachapoly_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); struct chachapoly_req_ctx *rctx = aead_request_ctx(req); struct poly_req *preq = &rctx->u.poly; struct scatterlist *crypt = req->src; int err; if (rctx->cryptlen == req->cryptlen) /* encrypting */ crypt = req->dst; |
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sg_init_table(rctx->src, 2); crypt = scatterwalk_ffwd(rctx->src, crypt, req->assoclen); |
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ahash_request_set_callback(&preq->req, aead_request_flags(req), poly_cipher_done, req); ahash_request_set_tfm(&preq->req, ctx->poly); ahash_request_set_crypt(&preq->req, crypt, NULL, rctx->cryptlen); err = crypto_ahash_update(&preq->req); if (err) return err; return poly_cipherpad(req); } static void poly_adpad_done(struct crypto_async_request *areq, int err) { async_done_continue(areq->data, err, poly_cipher); } static int poly_adpad(struct aead_request *req) { struct chachapoly_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); struct chachapoly_req_ctx *rctx = aead_request_ctx(req); struct poly_req *preq = &rctx->u.poly; unsigned int padlen, bs = POLY1305_BLOCK_SIZE; int err; |
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padlen = (bs - (rctx->assoclen % bs)) % bs; |
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memset(preq->pad, 0, sizeof(preq->pad)); sg_init_table(preq->src, 1); sg_set_buf(preq->src, preq->pad, padlen); ahash_request_set_callback(&preq->req, aead_request_flags(req), poly_adpad_done, req); ahash_request_set_tfm(&preq->req, ctx->poly); ahash_request_set_crypt(&preq->req, preq->src, NULL, padlen); err = crypto_ahash_update(&preq->req); if (err) return err; return poly_cipher(req); } static void poly_ad_done(struct crypto_async_request *areq, int err) { async_done_continue(areq->data, err, poly_adpad); } static int poly_ad(struct aead_request *req) { struct chachapoly_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); struct chachapoly_req_ctx *rctx = aead_request_ctx(req); struct poly_req *preq = &rctx->u.poly; int err; ahash_request_set_callback(&preq->req, aead_request_flags(req), poly_ad_done, req); ahash_request_set_tfm(&preq->req, ctx->poly); |
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ahash_request_set_crypt(&preq->req, req->src, NULL, rctx->assoclen); |
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err = crypto_ahash_update(&preq->req); if (err) return err; return poly_adpad(req); } |
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static void poly_setkey_done(struct crypto_async_request *areq, int err) |
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{ async_done_continue(areq->data, err, poly_ad); } |
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static int poly_setkey(struct aead_request *req) |
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{ struct chachapoly_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); struct chachapoly_req_ctx *rctx = aead_request_ctx(req); struct poly_req *preq = &rctx->u.poly; int err; |
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sg_init_table(preq->src, 1); sg_set_buf(preq->src, rctx->key, sizeof(rctx->key)); |
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ahash_request_set_callback(&preq->req, aead_request_flags(req), |
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poly_setkey_done, req); |
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ahash_request_set_tfm(&preq->req, ctx->poly); |
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ahash_request_set_crypt(&preq->req, preq->src, NULL, sizeof(rctx->key)); |
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err = crypto_ahash_update(&preq->req); |
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if (err) return err; return poly_ad(req); } |
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static void poly_init_done(struct crypto_async_request *areq, int err) |
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{ |
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async_done_continue(areq->data, err, poly_setkey); } static int poly_init(struct aead_request *req) { struct chachapoly_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); |
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struct chachapoly_req_ctx *rctx = aead_request_ctx(req); |
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struct poly_req *preq = &rctx->u.poly; |
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int err; |
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ahash_request_set_callback(&preq->req, aead_request_flags(req), poly_init_done, req); ahash_request_set_tfm(&preq->req, ctx->poly); |
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err = crypto_ahash_init(&preq->req); |
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if (err) return err; |
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return poly_setkey(req); |
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} static void poly_genkey_done(struct crypto_async_request *areq, int err) { |
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async_done_continue(areq->data, err, poly_init); |
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} static int poly_genkey(struct aead_request *req) { |
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struct crypto_aead *tfm = crypto_aead_reqtfm(req); struct chachapoly_ctx *ctx = crypto_aead_ctx(tfm); |
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struct chachapoly_req_ctx *rctx = aead_request_ctx(req); struct chacha_req *creq = &rctx->u.chacha; int err; |
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rctx->assoclen = req->assoclen; if (crypto_aead_ivsize(tfm) == 8) { if (rctx->assoclen < 8) return -EINVAL; rctx->assoclen -= 8; } |
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sg_init_table(creq->src, 1); |
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memset(rctx->key, 0, sizeof(rctx->key)); sg_set_buf(creq->src, rctx->key, sizeof(rctx->key)); |
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chacha_iv(creq->iv, req, 0); |
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skcipher_request_set_callback(&creq->req, aead_request_flags(req), poly_genkey_done, req); skcipher_request_set_tfm(&creq->req, ctx->chacha); skcipher_request_set_crypt(&creq->req, creq->src, creq->src, POLY1305_KEY_SIZE, creq->iv); |
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err = crypto_skcipher_decrypt(&creq->req); |
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if (err) return err; |
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return poly_init(req); |
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} static void chacha_encrypt_done(struct crypto_async_request *areq, int err) { async_done_continue(areq->data, err, poly_genkey); } static int chacha_encrypt(struct aead_request *req) { struct chachapoly_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); struct chachapoly_req_ctx *rctx = aead_request_ctx(req); struct chacha_req *creq = &rctx->u.chacha; |
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struct scatterlist *src, *dst; |
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int err; |
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if (req->cryptlen == 0) goto skip; |
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chacha_iv(creq->iv, req, 1); |
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sg_init_table(rctx->src, 2); src = scatterwalk_ffwd(rctx->src, req->src, req->assoclen); dst = src; if (req->src != req->dst) { sg_init_table(rctx->dst, 2); dst = scatterwalk_ffwd(rctx->dst, req->dst, req->assoclen); } |
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skcipher_request_set_callback(&creq->req, aead_request_flags(req), chacha_encrypt_done, req); skcipher_request_set_tfm(&creq->req, ctx->chacha); skcipher_request_set_crypt(&creq->req, src, dst, req->cryptlen, creq->iv); err = crypto_skcipher_encrypt(&creq->req); |
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if (err) return err; |
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skip: |
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return poly_genkey(req); } static int chachapoly_encrypt(struct aead_request *req) { struct chachapoly_req_ctx *rctx = aead_request_ctx(req); rctx->cryptlen = req->cryptlen; /* encrypt call chain: * - chacha_encrypt/done() |
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* - poly_genkey/done() |
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* - poly_init/done() |
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* - poly_setkey/done() |
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* - poly_ad/done() * - poly_adpad/done() * - poly_cipher/done() * - poly_cipherpad/done() * - poly_tail/done/continue() * - poly_copy_tag() */ return chacha_encrypt(req); } static int chachapoly_decrypt(struct aead_request *req) { struct chachapoly_req_ctx *rctx = aead_request_ctx(req); |
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rctx->cryptlen = req->cryptlen - POLY1305_DIGEST_SIZE; /* decrypt call chain: |
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* - poly_genkey/done() |
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* - poly_init/done() |
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* - poly_setkey/done() |
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* - poly_ad/done() * - poly_adpad/done() * - poly_cipher/done() * - poly_cipherpad/done() * - poly_tail/done/continue() * - chacha_decrypt/done() * - poly_verify_tag() */ return poly_genkey(req); } static int chachapoly_setkey(struct crypto_aead *aead, const u8 *key, unsigned int keylen) { struct chachapoly_ctx *ctx = crypto_aead_ctx(aead); int err; if (keylen != ctx->saltlen + CHACHA20_KEY_SIZE) return -EINVAL; keylen -= ctx->saltlen; memcpy(ctx->salt, key + keylen, ctx->saltlen); |
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crypto_skcipher_clear_flags(ctx->chacha, CRYPTO_TFM_REQ_MASK); crypto_skcipher_set_flags(ctx->chacha, crypto_aead_get_flags(aead) & CRYPTO_TFM_REQ_MASK); |
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err = crypto_skcipher_setkey(ctx->chacha, key, keylen); crypto_aead_set_flags(aead, crypto_skcipher_get_flags(ctx->chacha) & CRYPTO_TFM_RES_MASK); |
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return err; } static int chachapoly_setauthsize(struct crypto_aead *tfm, unsigned int authsize) { if (authsize != POLY1305_DIGEST_SIZE) return -EINVAL; return 0; } |
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static int chachapoly_init(struct crypto_aead *tfm) |
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{ |
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struct aead_instance *inst = aead_alg_instance(tfm); struct chachapoly_instance_ctx *ictx = aead_instance_ctx(inst); struct chachapoly_ctx *ctx = crypto_aead_ctx(tfm); |
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struct crypto_skcipher *chacha; |
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struct crypto_ahash *poly; unsigned long align; poly = crypto_spawn_ahash(&ictx->poly); if (IS_ERR(poly)) return PTR_ERR(poly); |
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chacha = crypto_spawn_skcipher(&ictx->chacha); |
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if (IS_ERR(chacha)) { crypto_free_ahash(poly); return PTR_ERR(chacha); } ctx->chacha = chacha; ctx->poly = poly; ctx->saltlen = ictx->saltlen; |
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align = crypto_aead_alignmask(tfm); |
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align &= ~(crypto_tfm_ctx_alignment() - 1); |
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crypto_aead_set_reqsize( tfm, align + offsetof(struct chachapoly_req_ctx, u) + max(offsetof(struct chacha_req, req) + |
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sizeof(struct skcipher_request) + crypto_skcipher_reqsize(chacha), |
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offsetof(struct poly_req, req) + sizeof(struct ahash_request) + crypto_ahash_reqsize(poly))); |
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return 0; } |
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static void chachapoly_exit(struct crypto_aead *tfm) |
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{ |
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struct chachapoly_ctx *ctx = crypto_aead_ctx(tfm); |
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530 531 |
crypto_free_ahash(ctx->poly); |
1e1f00611 crypto: chacha20p... |
532 |
crypto_free_skcipher(ctx->chacha); |
71ebc4d1b crypto: chacha20p... |
533 |
} |
747909223 crypto: chacha20p... |
534 535 536 537 538 539 540 541 542 543 544 |
static void chachapoly_free(struct aead_instance *inst) { struct chachapoly_instance_ctx *ctx = aead_instance_ctx(inst); crypto_drop_skcipher(&ctx->chacha); crypto_drop_ahash(&ctx->poly); kfree(inst); } static int chachapoly_create(struct crypto_template *tmpl, struct rtattr **tb, const char *name, unsigned int ivsize) |
71ebc4d1b crypto: chacha20p... |
545 546 |
{ struct crypto_attr_type *algt; |
747909223 crypto: chacha20p... |
547 |
struct aead_instance *inst; |
1e1f00611 crypto: chacha20p... |
548 |
struct skcipher_alg *chacha; |
71ebc4d1b crypto: chacha20p... |
549 |
struct crypto_alg *poly; |
747909223 crypto: chacha20p... |
550 |
struct hash_alg_common *poly_hash; |
71ebc4d1b crypto: chacha20p... |
551 552 553 554 555 |
struct chachapoly_instance_ctx *ctx; const char *chacha_name, *poly_name; int err; if (ivsize > CHACHAPOLY_IV_SIZE) |
747909223 crypto: chacha20p... |
556 |
return -EINVAL; |
71ebc4d1b crypto: chacha20p... |
557 558 559 |
algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) |
747909223 crypto: chacha20p... |
560 |
return PTR_ERR(algt); |
71ebc4d1b crypto: chacha20p... |
561 |
|
5e4b8c1fc crypto: aead - Re... |
562 |
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) |
747909223 crypto: chacha20p... |
563 |
return -EINVAL; |
71ebc4d1b crypto: chacha20p... |
564 565 566 |
chacha_name = crypto_attr_alg_name(tb[1]); if (IS_ERR(chacha_name)) |
747909223 crypto: chacha20p... |
567 |
return PTR_ERR(chacha_name); |
71ebc4d1b crypto: chacha20p... |
568 569 |
poly_name = crypto_attr_alg_name(tb[2]); if (IS_ERR(poly_name)) |
747909223 crypto: chacha20p... |
570 |
return PTR_ERR(poly_name); |
71ebc4d1b crypto: chacha20p... |
571 572 573 |
poly = crypto_find_alg(poly_name, &crypto_ahash_type, CRYPTO_ALG_TYPE_HASH, |
1e1f00611 crypto: chacha20p... |
574 575 576 |
CRYPTO_ALG_TYPE_AHASH_MASK | crypto_requires_sync(algt->type, algt->mask)); |
71ebc4d1b crypto: chacha20p... |
577 |
if (IS_ERR(poly)) |
747909223 crypto: chacha20p... |
578 |
return PTR_ERR(poly); |
e57121d08 crypto: chacha20p... |
579 580 581 582 583 |
poly_hash = __crypto_hash_alg_common(poly); err = -EINVAL; if (poly_hash->digestsize != POLY1305_DIGEST_SIZE) goto out_put_poly; |
71ebc4d1b crypto: chacha20p... |
584 585 586 587 588 |
err = -ENOMEM; inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) goto out_put_poly; |
747909223 crypto: chacha20p... |
589 |
ctx = aead_instance_ctx(inst); |
71ebc4d1b crypto: chacha20p... |
590 |
ctx->saltlen = CHACHAPOLY_IV_SIZE - ivsize; |
747909223 crypto: chacha20p... |
591 592 |
err = crypto_init_ahash_spawn(&ctx->poly, poly_hash, aead_crypto_instance(inst)); |
71ebc4d1b crypto: chacha20p... |
593 594 |
if (err) goto err_free_inst; |
747909223 crypto: chacha20p... |
595 |
crypto_set_skcipher_spawn(&ctx->chacha, aead_crypto_instance(inst)); |
a35528eca crypto: skcipher ... |
596 597 598 |
err = crypto_grab_skcipher(&ctx->chacha, chacha_name, 0, crypto_requires_sync(algt->type, algt->mask)); |
71ebc4d1b crypto: chacha20p... |
599 600 |
if (err) goto err_drop_poly; |
1e1f00611 crypto: chacha20p... |
601 |
chacha = crypto_spawn_skcipher_alg(&ctx->chacha); |
71ebc4d1b crypto: chacha20p... |
602 603 604 |
err = -EINVAL; /* Need 16-byte IV size, including Initial Block Counter value */ |
1e1f00611 crypto: chacha20p... |
605 |
if (crypto_skcipher_alg_ivsize(chacha) != CHACHA20_IV_SIZE) |
71ebc4d1b crypto: chacha20p... |
606 607 |
goto out_drop_chacha; /* Not a stream cipher? */ |
1e1f00611 crypto: chacha20p... |
608 |
if (chacha->base.cra_blocksize != 1) |
71ebc4d1b crypto: chacha20p... |
609 610 611 |
goto out_drop_chacha; err = -ENAMETOOLONG; |
747909223 crypto: chacha20p... |
612 |
if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
71ebc4d1b crypto: chacha20p... |
613 614 615 |
"%s(%s,%s)", name, chacha_name, poly_name) >= CRYPTO_MAX_ALG_NAME) goto out_drop_chacha; |
747909223 crypto: chacha20p... |
616 |
if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
1e1f00611 crypto: chacha20p... |
617 |
"%s(%s,%s)", name, chacha->base.cra_driver_name, |
71ebc4d1b crypto: chacha20p... |
618 619 |
poly->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) goto out_drop_chacha; |
1e1f00611 crypto: chacha20p... |
620 |
inst->alg.base.cra_flags = (chacha->base.cra_flags | poly->cra_flags) & |
747909223 crypto: chacha20p... |
621 |
CRYPTO_ALG_ASYNC; |
1e1f00611 crypto: chacha20p... |
622 |
inst->alg.base.cra_priority = (chacha->base.cra_priority + |
747909223 crypto: chacha20p... |
623 624 |
poly->cra_priority) / 2; inst->alg.base.cra_blocksize = 1; |
1e1f00611 crypto: chacha20p... |
625 |
inst->alg.base.cra_alignmask = chacha->base.cra_alignmask | |
747909223 crypto: chacha20p... |
626 627 628 629 |
poly->cra_alignmask; inst->alg.base.cra_ctxsize = sizeof(struct chachapoly_ctx) + ctx->saltlen; inst->alg.ivsize = ivsize; |
1e1f00611 crypto: chacha20p... |
630 |
inst->alg.chunksize = crypto_skcipher_alg_chunksize(chacha); |
747909223 crypto: chacha20p... |
631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 |
inst->alg.maxauthsize = POLY1305_DIGEST_SIZE; inst->alg.init = chachapoly_init; inst->alg.exit = chachapoly_exit; inst->alg.encrypt = chachapoly_encrypt; inst->alg.decrypt = chachapoly_decrypt; inst->alg.setkey = chachapoly_setkey; inst->alg.setauthsize = chachapoly_setauthsize; inst->free = chachapoly_free; err = aead_register_instance(tmpl, inst); if (err) goto out_drop_chacha; out_put_poly: |
71ebc4d1b crypto: chacha20p... |
646 |
crypto_mod_put(poly); |
747909223 crypto: chacha20p... |
647 |
return err; |
71ebc4d1b crypto: chacha20p... |
648 649 650 651 652 653 654 |
out_drop_chacha: crypto_drop_skcipher(&ctx->chacha); err_drop_poly: crypto_drop_ahash(&ctx->poly); err_free_inst: kfree(inst); |
747909223 crypto: chacha20p... |
655 |
goto out_put_poly; |
71ebc4d1b crypto: chacha20p... |
656 |
} |
747909223 crypto: chacha20p... |
657 |
static int rfc7539_create(struct crypto_template *tmpl, struct rtattr **tb) |
4db4ad260 crypto: chacha20p... |
658 |
{ |
747909223 crypto: chacha20p... |
659 |
return chachapoly_create(tmpl, tb, "rfc7539", 12); |
4db4ad260 crypto: chacha20p... |
660 |
} |
747909223 crypto: chacha20p... |
661 |
static int rfc7539esp_create(struct crypto_template *tmpl, struct rtattr **tb) |
71ebc4d1b crypto: chacha20p... |
662 |
{ |
747909223 crypto: chacha20p... |
663 |
return chachapoly_create(tmpl, tb, "rfc7539esp", 8); |
71ebc4d1b crypto: chacha20p... |
664 665 666 667 |
} static struct crypto_template rfc7539_tmpl = { .name = "rfc7539", |
747909223 crypto: chacha20p... |
668 |
.create = rfc7539_create, |
71ebc4d1b crypto: chacha20p... |
669 670 |
.module = THIS_MODULE, }; |
4db4ad260 crypto: chacha20p... |
671 672 |
static struct crypto_template rfc7539esp_tmpl = { .name = "rfc7539esp", |
747909223 crypto: chacha20p... |
673 |
.create = rfc7539esp_create, |
4db4ad260 crypto: chacha20p... |
674 675 |
.module = THIS_MODULE, }; |
71ebc4d1b crypto: chacha20p... |
676 677 |
static int __init chacha20poly1305_module_init(void) { |
4db4ad260 crypto: chacha20p... |
678 679 680 681 682 683 684 685 686 687 688 |
int err; err = crypto_register_template(&rfc7539_tmpl); if (err) return err; err = crypto_register_template(&rfc7539esp_tmpl); if (err) crypto_unregister_template(&rfc7539_tmpl); return err; |
71ebc4d1b crypto: chacha20p... |
689 690 691 692 |
} static void __exit chacha20poly1305_module_exit(void) { |
4db4ad260 crypto: chacha20p... |
693 |
crypto_unregister_template(&rfc7539esp_tmpl); |
71ebc4d1b crypto: chacha20p... |
694 695 696 697 698 699 700 701 702 |
crypto_unregister_template(&rfc7539_tmpl); } module_init(chacha20poly1305_module_init); module_exit(chacha20poly1305_module_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Martin Willi <martin@strongswan.org>"); MODULE_DESCRIPTION("ChaCha20-Poly1305 AEAD"); |
71ebc4d1b crypto: chacha20p... |
703 |
MODULE_ALIAS_CRYPTO("rfc7539"); |
4db4ad260 crypto: chacha20p... |
704 |
MODULE_ALIAS_CRYPTO("rfc7539esp"); |