diff options
Diffstat (limited to 'src/lib/libcrypto/evp/evp_aead.c')
-rw-r--r-- | src/lib/libcrypto/evp/evp_aead.c | 144 |
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 | |||
26 | size_t | ||
27 | EVP_AEAD_key_length(const EVP_AEAD *aead) | ||
28 | { | ||
29 | return aead->key_len; | ||
30 | } | ||
31 | |||
32 | size_t | ||
33 | EVP_AEAD_nonce_length(const EVP_AEAD *aead) | ||
34 | { | ||
35 | return aead->nonce_len; | ||
36 | } | ||
37 | |||
38 | size_t | ||
39 | EVP_AEAD_max_overhead(const EVP_AEAD *aead) | ||
40 | { | ||
41 | return aead->overhead; | ||
42 | } | ||
43 | |||
44 | size_t | ||
45 | EVP_AEAD_max_tag_len(const EVP_AEAD *aead) | ||
46 | { | ||
47 | return aead->max_tag_len; | ||
48 | } | ||
49 | |||
50 | int | ||
51 | EVP_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 | |||
62 | void | ||
63 | EVP_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. */ | ||
79 | static int | ||
80 | check_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 | |||
89 | int | ||
90 | EVP_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 | |||
113 | error: | ||
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 | |||
121 | int | ||
122 | EVP_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 | |||
137 | error: | ||
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 | } | ||