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WPAPSK CPU formats: Remove dependency on OpenSSL for 802.11w support #5614
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| /* | ||
| * This code implements the CMAC (Cipher-based Message Authentication) | ||
| * algorithm described in FIPS SP800-38B using the AES-128 cipher. | ||
| * | ||
| * Copyright (c) 2017, magnum. | ||
| * Copyright (c) 2008 Damien Bergamini <damien.bergamini@free.fr> | ||
| * | ||
| * Permission to use, copy, modify, and 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. | ||
| */ | ||
|
|
||
| #ifndef JTR_CMAC_H | ||
| #define JTR_CMAC_H | ||
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| #include <stdint.h> | ||
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| #include "aes.h" | ||
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| #define AES_CMAC_KEY_LENGTH 16 | ||
| #define AES_CMAC_DIGEST_LENGTH 16 | ||
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| typedef struct _AES_CMAC_CTX { | ||
| AES_KEY aesctx; | ||
| uint8_t X[16]; | ||
| uint8_t M_last[16]; | ||
| uint32_t M_n; | ||
| } AES_CMAC_CTX; | ||
|
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| extern void AES_CMAC_Init(AES_CMAC_CTX *ctx); | ||
| extern void AES_CMAC_SetKey(AES_CMAC_CTX *ctx, const uint8_t *key); | ||
| extern void AES_CMAC_Update(AES_CMAC_CTX *ctx, const uint8_t *data, uint32_t len); | ||
| extern void AES_CMAC_Final(uint8_t *digest, AES_CMAC_CTX *ctx); | ||
|
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| #endif /* JTR_CMAC_H */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| /* | ||
| * This code implements the CMAC (Cipher-based Message Authentication) | ||
| * algorithm described in FIPS SP800-38B using the AES-128 cipher. | ||
| * | ||
| * Copyright (c) 2017, magnum. | ||
| * Copyright (c) 2008 Damien Bergamini <damien.bergamini@free.fr> | ||
| * | ||
| * Permission to use, copy, modify, and 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. | ||
| */ | ||
|
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||
| #include "cmac.h" | ||
| #include "common.h" | ||
|
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| #define LSHIFT(v, r) do { \ | ||
| uint32_t i; \ | ||
| for (i = 0; i < 15; i++) \ | ||
| (r)[i] = (v)[i] << 1 | (v)[i + 1] >> 7; \ | ||
| (r)[15] = (v)[15] << 1; \ | ||
| } while (0) | ||
|
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| #define XOR(v, r) do { \ | ||
| uint32_t i; \ | ||
| for (i = 0; i < 16; i++) \ | ||
| (r)[i] ^= (v)[i]; \ | ||
| } while (0) | ||
|
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| void AES_CMAC_Init(AES_CMAC_CTX *ctx) | ||
| { | ||
| uint32_t i; | ||
|
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| for (i = 0; i < 16; i++) | ||
| ctx->X[i] = 0; | ||
| ctx->M_n = 0; | ||
| } | ||
|
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| void AES_CMAC_SetKey(AES_CMAC_CTX *ctx, const uint8_t *key) | ||
| { | ||
| AES_set_encrypt_key(key, 128, &ctx->aesctx); | ||
| } | ||
|
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| void AES_CMAC_Update(AES_CMAC_CTX *ctx, const uint8_t *data, uint32_t len) | ||
| { | ||
| uint32_t i; | ||
|
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| if (ctx->M_n > 0) { | ||
| uint32_t mlen = MIN(16 - ctx->M_n, len); | ||
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| for (i = 0; i < mlen; i++) | ||
| ctx->M_last[ctx->M_n + i] = data[i]; | ||
| ctx->M_n += mlen; | ||
| if (ctx->M_n < 16 || len == mlen) | ||
| return; | ||
| XOR(ctx->M_last, ctx->X); | ||
| AES_encrypt(ctx->X, ctx->X, &ctx->aesctx); | ||
| data += mlen; | ||
| len -= mlen; | ||
| } | ||
| while (len > 16) { /* not last block */ | ||
| XOR(data, ctx->X); | ||
| AES_encrypt(ctx->X, ctx->X, &ctx->aesctx); | ||
| data += 16; | ||
| len -= 16; | ||
| } | ||
| /* potential last block, save it */ | ||
| for (i = 0; i < len; i++) | ||
| ctx->M_last[i] = data[i]; | ||
| ctx->M_n = len; | ||
| } | ||
|
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| void AES_CMAC_Final(uint8_t *digest, AES_CMAC_CTX *ctx) | ||
| { | ||
| uint8_t K[16] = { 0 }; | ||
|
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| /* generate subkey K1 */ | ||
| AES_encrypt(K, K, &ctx->aesctx); | ||
|
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| if (K[0] & 0x80) { | ||
| LSHIFT(K, K); | ||
| K[15] ^= 0x87; | ||
| } else | ||
| LSHIFT(K, K); | ||
|
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| if (ctx->M_n == 16) { | ||
| /* last block was a complete block */ | ||
| XOR(K, ctx->M_last); | ||
| } else { | ||
| /* generate subkey K2 */ | ||
| if (K[0] & 0x80) { | ||
| LSHIFT(K, K); | ||
| K[15] ^= 0x87; | ||
| } else | ||
| LSHIFT(K, K); | ||
|
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| /* padding(M_last) */ | ||
| ctx->M_last[ctx->M_n] = 0x80; | ||
| while (++ctx->M_n < 16) | ||
| ctx->M_last[ctx->M_n] = 0; | ||
|
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| XOR(K, ctx->M_last); | ||
| } | ||
| XOR(ctx->M_last, ctx->X); | ||
| AES_encrypt(ctx->X, digest, &ctx->aesctx); | ||
| } | ||
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What do we use from
common.hhere?There was a problem hiding this comment.
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Just the MIN() macro.