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-rw-r--r--src/lib/libcrypto/evp/evp_aead.c144
1 files changed, 0 insertions, 144 deletions
diff --git a/src/lib/libcrypto/evp/evp_aead.c b/src/lib/libcrypto/evp/evp_aead.c
deleted file mode 100644
index 197b7f515f..0000000000
--- a/src/lib/libcrypto/evp/evp_aead.c
+++ /dev/null
@@ -1,144 +0,0 @@
1/* $OpenBSD: evp_aead.c,v 1.5 2014/06/21 15:30:36 jsing Exp $ */
2/*
3 * Copyright (c) 2014, Google Inc.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
12 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
14 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
15 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#include <limits.h>
19#include <string.h>
20
21#include <openssl/evp.h>
22#include <openssl/err.h>
23
24#include "evp_locl.h"
25
26size_t
27EVP_AEAD_key_length(const EVP_AEAD *aead)
28{
29 return aead->key_len;
30}
31
32size_t
33EVP_AEAD_nonce_length(const EVP_AEAD *aead)
34{
35 return aead->nonce_len;
36}
37
38size_t
39EVP_AEAD_max_overhead(const EVP_AEAD *aead)
40{
41 return aead->overhead;
42}
43
44size_t
45EVP_AEAD_max_tag_len(const EVP_AEAD *aead)
46{
47 return aead->max_tag_len;
48}
49
50int
51EVP_AEAD_CTX_init(EVP_AEAD_CTX *ctx, const EVP_AEAD *aead,
52 const unsigned char *key, size_t key_len, size_t tag_len, ENGINE *impl)
53{
54 ctx->aead = aead;
55 if (key_len != aead->key_len) {
56 EVPerr(EVP_F_EVP_AEAD_CTX_INIT, EVP_R_UNSUPPORTED_KEY_SIZE);
57 return 0;
58 }
59 return aead->init(ctx, key, key_len, tag_len);
60}
61
62void
63EVP_AEAD_CTX_cleanup(EVP_AEAD_CTX *ctx)
64{
65 if (ctx->aead == NULL)
66 return;
67 ctx->aead->cleanup(ctx);
68 ctx->aead = NULL;
69}
70
71/* check_alias returns 0 if out points within the buffer determined by in
72 * and in_len and 1 otherwise.
73 *
74 * When processing, there's only an issue if out points within in[:in_len]
75 * and isn't equal to in. If that's the case then writing the output will
76 * stomp input that hasn't been read yet.
77 *
78 * This function checks for that case. */
79static int
80check_alias(const unsigned char *in, size_t in_len, const unsigned char *out)
81{
82 if (out <= in)
83 return 1;
84 if (in + in_len <= out)
85 return 1;
86 return 0;
87}
88
89int
90EVP_AEAD_CTX_seal(const EVP_AEAD_CTX *ctx, unsigned char *out, size_t *out_len,
91 size_t max_out_len, const unsigned char *nonce, size_t nonce_len,
92 const unsigned char *in, size_t in_len, const unsigned char *ad,
93 size_t ad_len)
94{
95 size_t possible_out_len = in_len + ctx->aead->overhead;
96
97 /* Overflow. */
98 if (possible_out_len < in_len) {
99 EVPerr(EVP_F_AEAD_CTX_SEAL, EVP_R_TOO_LARGE);
100 goto error;
101 }
102
103 if (!check_alias(in, in_len, out)) {
104 EVPerr(EVP_F_AEAD_CTX_SEAL, EVP_R_OUTPUT_ALIASES_INPUT);
105 goto error;
106 }
107
108 if (ctx->aead->seal(ctx, out, out_len, max_out_len, nonce, nonce_len,
109 in, in_len, ad, ad_len)) {
110 return 1;
111 }
112
113error:
114 /* In the event of an error, clear the output buffer so that a caller
115 * that doesn't check the return value doesn't send raw data. */
116 memset(out, 0, max_out_len);
117 *out_len = 0;
118 return 0;
119}
120
121int
122EVP_AEAD_CTX_open(const EVP_AEAD_CTX *ctx, unsigned char *out, size_t *out_len,
123 size_t max_out_len, const unsigned char *nonce, size_t nonce_len,
124 const unsigned char *in, size_t in_len, const unsigned char *ad,
125 size_t ad_len)
126{
127 if (!check_alias(in, in_len, out)) {
128 EVPerr(EVP_F_AEAD_CTX_OPEN, EVP_R_OUTPUT_ALIASES_INPUT);
129 goto error;
130 }
131
132 if (ctx->aead->open(ctx, out, out_len, max_out_len, nonce, nonce_len,
133 in, in_len, ad, ad_len)) {
134 return 1;
135 }
136
137error:
138 /* In the event of an error, clear the output buffer so that a caller
139 * that doesn't check the return value doesn't try and process bad
140 * data. */
141 memset(out, 0, max_out_len);
142 *out_len = 0;
143 return 0;
144}