From 31b9fa4f384115e400c0a49b35730b42d07b6ff6 Mon Sep 17 00:00:00 2001 From: "Lukacs T. Berki" Date: Thu, 7 Apr 2016 10:03:04 +0200 Subject: Add BoringSSL to third_party . As usual, README.md contains reproduction instructions. It would be better to directly use the source tree under `boringssl.googlesource.com`, but for the time being, this will do. Change-Id: I72ef030251c41eaed459c4abd93228f23223783b --- third_party/boringssl/src/crypto/cipher/aead.c | 158 +++++++++++++++++++++++++ 1 file changed, 158 insertions(+) create mode 100644 third_party/boringssl/src/crypto/cipher/aead.c (limited to 'third_party/boringssl/src/crypto/cipher/aead.c') diff --git a/third_party/boringssl/src/crypto/cipher/aead.c b/third_party/boringssl/src/crypto/cipher/aead.c new file mode 100644 index 0000000000..7e747f870e --- /dev/null +++ b/third_party/boringssl/src/crypto/cipher/aead.c @@ -0,0 +1,158 @@ +/* Copyright (c) 2014, Google Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ + +#include + +#include + +#include +#include + +#include "internal.h" + + +size_t EVP_AEAD_key_length(const EVP_AEAD *aead) { return aead->key_len; } + +size_t EVP_AEAD_nonce_length(const EVP_AEAD *aead) { return aead->nonce_len; } + +size_t EVP_AEAD_max_overhead(const EVP_AEAD *aead) { return aead->overhead; } + +size_t EVP_AEAD_max_tag_len(const EVP_AEAD *aead) { return aead->max_tag_len; } + +void EVP_AEAD_CTX_zero(EVP_AEAD_CTX *ctx) { + memset(ctx, 0, sizeof(EVP_AEAD_CTX)); +} + +int EVP_AEAD_CTX_init(EVP_AEAD_CTX *ctx, const EVP_AEAD *aead, + const uint8_t *key, size_t key_len, size_t tag_len, + ENGINE *impl) { + if (!aead->init) { + OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_NO_DIRECTION_SET); + ctx->aead = NULL; + return 0; + } + return EVP_AEAD_CTX_init_with_direction(ctx, aead, key, key_len, tag_len, + evp_aead_open); +} + +int EVP_AEAD_CTX_init_with_direction(EVP_AEAD_CTX *ctx, const EVP_AEAD *aead, + const uint8_t *key, size_t key_len, + size_t tag_len, + enum evp_aead_direction_t dir) { + if (key_len != aead->key_len) { + OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_UNSUPPORTED_KEY_SIZE); + ctx->aead = NULL; + return 0; + } + + ctx->aead = aead; + + int ok; + if (aead->init) { + ok = aead->init(ctx, key, key_len, tag_len); + } else { + ok = aead->init_with_direction(ctx, key, key_len, tag_len, dir); + } + + if (!ok) { + ctx->aead = NULL; + } + + return ok; +} + +void EVP_AEAD_CTX_cleanup(EVP_AEAD_CTX *ctx) { + if (ctx->aead == NULL) { + return; + } + ctx->aead->cleanup(ctx); + ctx->aead = NULL; +} + +/* check_alias returns 0 if |out| points within the buffer determined by |in| + * and |in_len| and 1 otherwise. + * + * When processing, there's only an issue if |out| points within in[:in_len] + * and isn't equal to |in|. If that's the case then writing the output will + * stomp input that hasn't been read yet. + * + * This function checks for that case. */ +static int check_alias(const uint8_t *in, size_t in_len, const uint8_t *out) { + if (out <= in) { + return 1; + } else if (in + in_len <= out) { + return 1; + } + return 0; +} + +int EVP_AEAD_CTX_seal(const EVP_AEAD_CTX *ctx, uint8_t *out, size_t *out_len, + size_t max_out_len, const uint8_t *nonce, + size_t nonce_len, const uint8_t *in, size_t in_len, + const uint8_t *ad, size_t ad_len) { + size_t possible_out_len = in_len + ctx->aead->overhead; + + if (possible_out_len < in_len /* overflow */) { + OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_TOO_LARGE); + goto error; + } + + if (!check_alias(in, in_len, out)) { + OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_OUTPUT_ALIASES_INPUT); + goto error; + } + + if (ctx->aead->seal(ctx, out, out_len, max_out_len, nonce, nonce_len, in, + in_len, ad, ad_len)) { + return 1; + } + +error: + /* In the event of an error, clear the output buffer so that a caller + * that doesn't check the return value doesn't send raw data. */ + memset(out, 0, max_out_len); + *out_len = 0; + return 0; +} + +int EVP_AEAD_CTX_open(const EVP_AEAD_CTX *ctx, uint8_t *out, size_t *out_len, + size_t max_out_len, const uint8_t *nonce, + size_t nonce_len, const uint8_t *in, size_t in_len, + const uint8_t *ad, size_t ad_len) { + if (!check_alias(in, in_len, out)) { + OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_OUTPUT_ALIASES_INPUT); + goto error; + } + + if (ctx->aead->open(ctx, out, out_len, max_out_len, nonce, nonce_len, in, + in_len, ad, ad_len)) { + return 1; + } + +error: + /* In the event of an error, clear the output buffer so that a caller + * that doesn't check the return value doesn't try and process bad + * data. */ + memset(out, 0, max_out_len); + *out_len = 0; + return 0; +} + +int EVP_AEAD_CTX_get_rc4_state(const EVP_AEAD_CTX *ctx, const RC4_KEY **out_key) { + if (ctx->aead->get_rc4_state == NULL) { + return 0; + } + + return ctx->aead->get_rc4_state(ctx, out_key); +} -- cgit v1.2.3