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/* ==================================================================== |
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* Copyright (c) 2001-2011 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* openssl-core@openssl.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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*/ |
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|
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#include <openssl/opensslconf.h> |
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#ifndef OPENSSL_NO_AES |
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#include <openssl/crypto.h> |
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# include <openssl/evp.h> |
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# include <openssl/err.h> |
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# include <string.h> |
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# include <assert.h> |
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# include <openssl/aes.h> |
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# include "evp_locl.h" |
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# ifndef OPENSSL_FIPS |
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# include "modes_lcl.h" |
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# include <openssl/rand.h> |
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|
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typedef struct { |
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AES_KEY ks; |
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block128_f block; |
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union { |
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cbc128_f cbc; |
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ctr128_f ctr; |
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} stream; |
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} EVP_AES_KEY; |
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|
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typedef struct { |
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AES_KEY ks; /* AES key schedule to use */ |
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int key_set; /* Set if key initialised */ |
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int iv_set; /* Set if an iv is set */ |
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GCM128_CONTEXT gcm; |
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unsigned char *iv; /* Temporary IV store */ |
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int ivlen; /* IV length */ |
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int taglen; |
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int iv_gen; /* It is OK to generate IVs */ |
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int tls_aad_len; /* TLS AAD length */ |
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ctr128_f ctr; |
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} EVP_AES_GCM_CTX; |
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|
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typedef struct { |
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AES_KEY ks1, ks2; /* AES key schedules to use */ |
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XTS128_CONTEXT xts; |
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void (*stream) (const unsigned char *in, |
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unsigned char *out, size_t length, |
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const AES_KEY *key1, const AES_KEY *key2, |
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const unsigned char iv[16]); |
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} EVP_AES_XTS_CTX; |
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|
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typedef struct { |
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AES_KEY ks; /* AES key schedule to use */ |
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int key_set; /* Set if key initialised */ |
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int iv_set; /* Set if an iv is set */ |
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int tag_set; /* Set if tag is valid */ |
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int len_set; /* Set if message length set */ |
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int L, M; /* L and M parameters from RFC3610 */ |
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CCM128_CONTEXT ccm; |
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ccm128_f str; |
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} EVP_AES_CCM_CTX; |
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|
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# define MAXBITCHUNK ((size_t)1<<(sizeof(size_t)*8-4)) |
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|
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# ifdef VPAES_ASM |
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int vpaes_set_encrypt_key(const unsigned char *userKey, int bits, |
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AES_KEY *key); |
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int vpaes_set_decrypt_key(const unsigned char *userKey, int bits, |
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AES_KEY *key); |
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|
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void vpaes_encrypt(const unsigned char *in, unsigned char *out, |
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const AES_KEY *key); |
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void vpaes_decrypt(const unsigned char *in, unsigned char *out, |
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const AES_KEY *key); |
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|
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void vpaes_cbc_encrypt(const unsigned char *in, |
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unsigned char *out, |
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size_t length, |
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const AES_KEY *key, unsigned char *ivec, int enc); |
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# endif |
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# ifdef BSAES_ASM |
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void bsaes_cbc_encrypt(const unsigned char *in, unsigned char *out, |
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size_t length, const AES_KEY *key, |
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unsigned char ivec[16], int enc); |
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void bsaes_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out, |
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size_t len, const AES_KEY *key, |
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const unsigned char ivec[16]); |
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void bsaes_xts_encrypt(const unsigned char *inp, unsigned char *out, |
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size_t len, const AES_KEY *key1, |
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const AES_KEY *key2, const unsigned char iv[16]); |
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void bsaes_xts_decrypt(const unsigned char *inp, unsigned char *out, |
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size_t len, const AES_KEY *key1, |
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const AES_KEY *key2, const unsigned char iv[16]); |
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# endif |
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# ifdef AES_CTR_ASM |
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void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out, |
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size_t blocks, const AES_KEY *key, |
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const unsigned char ivec[AES_BLOCK_SIZE]); |
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# endif |
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# ifdef AES_XTS_ASM |
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void AES_xts_encrypt(const char *inp, char *out, size_t len, |
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const AES_KEY *key1, const AES_KEY *key2, |
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const unsigned char iv[16]); |
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void AES_xts_decrypt(const char *inp, char *out, size_t len, |
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const AES_KEY *key1, const AES_KEY *key2, |
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const unsigned char iv[16]); |
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# endif |
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|
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# if defined(AES_ASM) && !defined(I386_ONLY) && ( \ |
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((defined(__i386) || defined(__i386__) || \ |
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defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \ |
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defined(__x86_64) || defined(__x86_64__) || \ |
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defined(_M_AMD64) || defined(_M_X64) || \ |
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defined(__INTEL__) ) |
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|
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extern unsigned int OPENSSL_ia32cap_P[2]; |
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|
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# ifdef VPAES_ASM |
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# define VPAES_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(41-32))) |
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# endif |
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# ifdef BSAES_ASM |
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# define BSAES_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(41-32))) |
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# endif |
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/* |
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* AES-NI section |
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*/ |
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# define AESNI_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(57-32))) |
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|
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int aesni_set_encrypt_key(const unsigned char *userKey, int bits, |
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AES_KEY *key); |
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int aesni_set_decrypt_key(const unsigned char *userKey, int bits, |
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AES_KEY *key); |
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|
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void aesni_encrypt(const unsigned char *in, unsigned char *out, |
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const AES_KEY *key); |
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void aesni_decrypt(const unsigned char *in, unsigned char *out, |
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const AES_KEY *key); |
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|
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void aesni_ecb_encrypt(const unsigned char *in, |
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unsigned char *out, |
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size_t length, const AES_KEY *key, int enc); |
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void aesni_cbc_encrypt(const unsigned char *in, |
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unsigned char *out, |
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size_t length, |
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const AES_KEY *key, unsigned char *ivec, int enc); |
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|
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void aesni_ctr32_encrypt_blocks(const unsigned char *in, |
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unsigned char *out, |
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size_t blocks, |
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const void *key, const unsigned char *ivec); |
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|
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void aesni_xts_encrypt(const unsigned char *in, |
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unsigned char *out, |
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size_t length, |
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const AES_KEY *key1, const AES_KEY *key2, |
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const unsigned char iv[16]); |
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|
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void aesni_xts_decrypt(const unsigned char *in, |
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unsigned char *out, |
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size_t length, |
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const AES_KEY *key1, const AES_KEY *key2, |
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const unsigned char iv[16]); |
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|
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void aesni_ccm64_encrypt_blocks(const unsigned char *in, |
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unsigned char *out, |
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size_t blocks, |
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const void *key, |
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const unsigned char ivec[16], |
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unsigned char cmac[16]); |
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|
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void aesni_ccm64_decrypt_blocks(const unsigned char *in, |
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unsigned char *out, |
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size_t blocks, |
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const void *key, |
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const unsigned char ivec[16], |
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unsigned char cmac[16]); |
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|
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static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc) |
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{ |
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int ret, mode; |
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EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; |
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|
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mode = ctx->cipher->flags & EVP_CIPH_MODE; |
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if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) |
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&& !enc) { |
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ret = aesni_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data); |
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dat->block = (block128_f) aesni_decrypt; |
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dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? |
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(cbc128_f) aesni_cbc_encrypt : NULL; |
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} else { |
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ret = aesni_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data); |
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dat->block = (block128_f) aesni_encrypt; |
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if (mode == EVP_CIPH_CBC_MODE) |
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dat->stream.cbc = (cbc128_f) aesni_cbc_encrypt; |
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else if (mode == EVP_CIPH_CTR_MODE) |
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dat->stream.ctr = (ctr128_f) aesni_ctr32_encrypt_blocks; |
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else |
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dat->stream.cbc = NULL; |
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} |
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|
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if (ret < 0) { |
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EVPerr(EVP_F_AESNI_INIT_KEY, EVP_R_AES_KEY_SETUP_FAILED); |
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return 0; |
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} |
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|
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return 1; |
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} |
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|
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static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t len) |
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{ |
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aesni_cbc_encrypt(in, out, len, ctx->cipher_data, ctx->iv, ctx->encrypt); |
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|
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return 1; |
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} |
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|
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static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t len) |
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{ |
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size_t bl = ctx->cipher->block_size; |
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|
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if (len < bl) |
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return 1; |
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|
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aesni_ecb_encrypt(in, out, len, ctx->cipher_data, ctx->encrypt); |
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|
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return 1; |
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} |
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|
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# define aesni_ofb_cipher aes_ofb_cipher |
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static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t len); |
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|
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# define aesni_cfb_cipher aes_cfb_cipher |
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static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t len); |
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|
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# define aesni_cfb8_cipher aes_cfb8_cipher |
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static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t len); |
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|
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# define aesni_cfb1_cipher aes_cfb1_cipher |
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static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t len); |
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|
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# define aesni_ctr_cipher aes_ctr_cipher |
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static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t len); |
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|
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static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc) |
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{ |
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EVP_AES_GCM_CTX *gctx = ctx->cipher_data; |
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if (!iv && !key) |
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return 1; |
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if (key) { |
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aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); |
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CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f) aesni_encrypt); |
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gctx->ctr = (ctr128_f) aesni_ctr32_encrypt_blocks; |
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/* |
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* If we have an iv can set it directly, otherwise use saved IV. |
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*/ |
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if (iv == NULL && gctx->iv_set) |
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iv = gctx->iv; |
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if (iv) { |
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CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
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gctx->iv_set = 1; |
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} |
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gctx->key_set = 1; |
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} else { |
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/* If key set use IV, otherwise copy */ |
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if (gctx->key_set) |
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CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
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else |
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memcpy(gctx->iv, iv, gctx->ivlen); |
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gctx->iv_set = 1; |
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gctx->iv_gen = 0; |
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} |
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return 1; |
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} |
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|
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# define aesni_gcm_cipher aes_gcm_cipher |
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static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t len); |
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|
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static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc) |
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{ |
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EVP_AES_XTS_CTX *xctx = ctx->cipher_data; |
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if (!iv && !key) |
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return 1; |
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|
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if (key) { |
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/* key_len is two AES keys */ |
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if (enc) { |
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aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
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xctx->xts.block1 = (block128_f) aesni_encrypt; |
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xctx->stream = aesni_xts_encrypt; |
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} else { |
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aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
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xctx->xts.block1 = (block128_f) aesni_decrypt; |
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xctx->stream = aesni_xts_decrypt; |
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} |
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|
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aesni_set_encrypt_key(key + ctx->key_len / 2, |
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ctx->key_len * 4, &xctx->ks2); |
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xctx->xts.block2 = (block128_f) aesni_encrypt; |
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|
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xctx->xts.key1 = &xctx->ks1; |
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} |
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|
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if (iv) { |
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xctx->xts.key2 = &xctx->ks2; |
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memcpy(ctx->iv, iv, 16); |
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} |
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|
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return 1; |
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} |
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|
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# define aesni_xts_cipher aes_xts_cipher |
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static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t len); |
| 367 |
|
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static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc) |
| 370 |
{ |
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EVP_AES_CCM_CTX *cctx = ctx->cipher_data; |
| 372 |
if (!iv && !key) |
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return 1; |
| 374 |
if (key) { |
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aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); |
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CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, |
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&cctx->ks, (block128_f) aesni_encrypt); |
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cctx->str = enc ? (ccm128_f) aesni_ccm64_encrypt_blocks : |
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(ccm128_f) aesni_ccm64_decrypt_blocks; |
| 380 |
cctx->key_set = 1; |
| 381 |
} |
| 382 |
if (iv) { |
| 383 |
memcpy(ctx->iv, iv, 15 - cctx->L); |
| 384 |
cctx->iv_set = 1; |
| 385 |
} |
| 386 |
return 1; |
| 387 |
} |
| 388 |
|
| 389 |
# define aesni_ccm_cipher aes_ccm_cipher |
| 390 |
static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 391 |
const unsigned char *in, size_t len); |
| 392 |
|
| 393 |
# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ |
| 394 |
static const EVP_CIPHER aesni_##keylen##_##mode = { \ |
| 395 |
nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ |
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flags|EVP_CIPH_##MODE##_MODE, \ |
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aesni_init_key, \ |
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aesni_##mode##_cipher, \ |
| 399 |
NULL, \ |
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sizeof(EVP_AES_KEY), \ |
| 401 |
NULL,NULL,NULL,NULL }; \ |
| 402 |
static const EVP_CIPHER aes_##keylen##_##mode = { \ |
| 403 |
nid##_##keylen##_##nmode,blocksize, \ |
| 404 |
keylen/8,ivlen, \ |
| 405 |
flags|EVP_CIPH_##MODE##_MODE, \ |
| 406 |
aes_init_key, \ |
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aes_##mode##_cipher, \ |
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NULL, \ |
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sizeof(EVP_AES_KEY), \ |
| 410 |
NULL,NULL,NULL,NULL }; \ |
| 411 |
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ |
| 412 |
{ return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; } |
| 413 |
|
| 414 |
# define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ |
| 415 |
static const EVP_CIPHER aesni_##keylen##_##mode = { \ |
| 416 |
nid##_##keylen##_##mode,blocksize, \ |
| 417 |
(EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ |
| 418 |
flags|EVP_CIPH_##MODE##_MODE, \ |
| 419 |
aesni_##mode##_init_key, \ |
| 420 |
aesni_##mode##_cipher, \ |
| 421 |
aes_##mode##_cleanup, \ |
| 422 |
sizeof(EVP_AES_##MODE##_CTX), \ |
| 423 |
NULL,NULL,aes_##mode##_ctrl,NULL }; \ |
| 424 |
static const EVP_CIPHER aes_##keylen##_##mode = { \ |
| 425 |
nid##_##keylen##_##mode,blocksize, \ |
| 426 |
(EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ |
| 427 |
flags|EVP_CIPH_##MODE##_MODE, \ |
| 428 |
aes_##mode##_init_key, \ |
| 429 |
aes_##mode##_cipher, \ |
| 430 |
aes_##mode##_cleanup, \ |
| 431 |
sizeof(EVP_AES_##MODE##_CTX), \ |
| 432 |
NULL,NULL,aes_##mode##_ctrl,NULL }; \ |
| 433 |
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ |
| 434 |
{ return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; } |
| 435 |
|
| 436 |
# else |
| 437 |
|
| 438 |
# define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ |
| 439 |
static const EVP_CIPHER aes_##keylen##_##mode = { \ |
| 440 |
nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ |
| 441 |
flags|EVP_CIPH_##MODE##_MODE, \ |
| 442 |
aes_init_key, \ |
| 443 |
aes_##mode##_cipher, \ |
| 444 |
NULL, \ |
| 445 |
sizeof(EVP_AES_KEY), \ |
| 446 |
NULL,NULL,NULL,NULL }; \ |
| 447 |
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ |
| 448 |
{ return &aes_##keylen##_##mode; } |
| 449 |
|
| 450 |
# define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ |
| 451 |
static const EVP_CIPHER aes_##keylen##_##mode = { \ |
| 452 |
nid##_##keylen##_##mode,blocksize, \ |
| 453 |
(EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ |
| 454 |
flags|EVP_CIPH_##MODE##_MODE, \ |
| 455 |
aes_##mode##_init_key, \ |
| 456 |
aes_##mode##_cipher, \ |
| 457 |
aes_##mode##_cleanup, \ |
| 458 |
sizeof(EVP_AES_##MODE##_CTX), \ |
| 459 |
NULL,NULL,aes_##mode##_ctrl,NULL }; \ |
| 460 |
const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ |
| 461 |
{ return &aes_##keylen##_##mode; } |
| 462 |
# endif |
| 463 |
|
| 464 |
# define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \ |
| 465 |
BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ |
| 466 |
BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ |
| 467 |
BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ |
| 468 |
BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ |
| 469 |
BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \ |
| 470 |
BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \ |
| 471 |
BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags) |
| 472 |
|
| 473 |
static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 474 |
const unsigned char *iv, int enc) |
| 475 |
{ |
| 476 |
int ret, mode; |
| 477 |
EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; |
| 478 |
|
| 479 |
mode = ctx->cipher->flags & EVP_CIPH_MODE; |
| 480 |
if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) |
| 481 |
&& !enc) |
| 482 |
# ifdef BSAES_CAPABLE |
| 483 |
if (BSAES_CAPABLE && mode == EVP_CIPH_CBC_MODE) { |
| 484 |
ret = AES_set_decrypt_key(key, ctx->key_len * 8, &dat->ks); |
| 485 |
dat->block = (block128_f) AES_decrypt; |
| 486 |
dat->stream.cbc = (cbc128_f) bsaes_cbc_encrypt; |
| 487 |
} else |
| 488 |
# endif |
| 489 |
# ifdef VPAES_CAPABLE |
| 490 |
if (VPAES_CAPABLE) { |
| 491 |
ret = vpaes_set_decrypt_key(key, ctx->key_len * 8, &dat->ks); |
| 492 |
dat->block = (block128_f) vpaes_decrypt; |
| 493 |
dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? |
| 494 |
(cbc128_f) vpaes_cbc_encrypt : NULL; |
| 495 |
} else |
| 496 |
# endif |
| 497 |
{ |
| 498 |
ret = AES_set_decrypt_key(key, ctx->key_len * 8, &dat->ks); |
| 499 |
dat->block = (block128_f) AES_decrypt; |
| 500 |
dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? |
| 501 |
(cbc128_f) AES_cbc_encrypt : NULL; |
| 502 |
} else |
| 503 |
# ifdef BSAES_CAPABLE |
| 504 |
if (BSAES_CAPABLE && mode == EVP_CIPH_CTR_MODE) { |
| 505 |
ret = AES_set_encrypt_key(key, ctx->key_len * 8, &dat->ks); |
| 506 |
dat->block = (block128_f) AES_encrypt; |
| 507 |
dat->stream.ctr = (ctr128_f) bsaes_ctr32_encrypt_blocks; |
| 508 |
} else |
| 509 |
# endif |
| 510 |
# ifdef VPAES_CAPABLE |
| 511 |
if (VPAES_CAPABLE) { |
| 512 |
ret = vpaes_set_encrypt_key(key, ctx->key_len * 8, &dat->ks); |
| 513 |
dat->block = (block128_f) vpaes_encrypt; |
| 514 |
dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? |
| 515 |
(cbc128_f) vpaes_cbc_encrypt : NULL; |
| 516 |
} else |
| 517 |
# endif |
| 518 |
{ |
| 519 |
ret = AES_set_encrypt_key(key, ctx->key_len * 8, &dat->ks); |
| 520 |
dat->block = (block128_f) AES_encrypt; |
| 521 |
dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ? |
| 522 |
(cbc128_f) AES_cbc_encrypt : NULL; |
| 523 |
# ifdef AES_CTR_ASM |
| 524 |
if (mode == EVP_CIPH_CTR_MODE) |
| 525 |
dat->stream.ctr = (ctr128_f) AES_ctr32_encrypt; |
| 526 |
# endif |
| 527 |
} |
| 528 |
|
| 529 |
if (ret < 0) { |
| 530 |
EVPerr(EVP_F_AES_INIT_KEY, EVP_R_AES_KEY_SETUP_FAILED); |
| 531 |
return 0; |
| 532 |
} |
| 533 |
|
| 534 |
return 1; |
| 535 |
} |
| 536 |
|
| 537 |
static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 538 |
const unsigned char *in, size_t len) |
| 539 |
{ |
| 540 |
EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; |
| 541 |
|
| 542 |
if (dat->stream.cbc) |
| 543 |
(*dat->stream.cbc) (in, out, len, &dat->ks, ctx->iv, ctx->encrypt); |
| 544 |
else if (ctx->encrypt) |
| 545 |
CRYPTO_cbc128_encrypt(in, out, len, &dat->ks, ctx->iv, dat->block); |
| 546 |
else |
| 547 |
CRYPTO_cbc128_encrypt(in, out, len, &dat->ks, ctx->iv, dat->block); |
| 548 |
|
| 549 |
return 1; |
| 550 |
} |
| 551 |
|
| 552 |
static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 553 |
const unsigned char *in, size_t len) |
| 554 |
{ |
| 555 |
size_t bl = ctx->cipher->block_size; |
| 556 |
size_t i; |
| 557 |
EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; |
| 558 |
|
| 559 |
if (len < bl) |
| 560 |
return 1; |
| 561 |
|
| 562 |
for (i = 0, len -= bl; i <= len; i += bl) |
| 563 |
(*dat->block) (in + i, out + i, &dat->ks); |
| 564 |
|
| 565 |
return 1; |
| 566 |
} |
| 567 |
|
| 568 |
static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 569 |
const unsigned char *in, size_t len) |
| 570 |
{ |
| 571 |
EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; |
| 572 |
|
| 573 |
CRYPTO_ofb128_encrypt(in, out, len, &dat->ks, |
| 574 |
ctx->iv, &ctx->num, dat->block); |
| 575 |
return 1; |
| 576 |
} |
| 577 |
|
| 578 |
static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 579 |
const unsigned char *in, size_t len) |
| 580 |
{ |
| 581 |
EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; |
| 582 |
|
| 583 |
CRYPTO_cfb128_encrypt(in, out, len, &dat->ks, |
| 584 |
ctx->iv, &ctx->num, ctx->encrypt, dat->block); |
| 585 |
return 1; |
| 586 |
} |
| 587 |
|
| 588 |
static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 589 |
const unsigned char *in, size_t len) |
| 590 |
{ |
| 591 |
EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; |
| 592 |
|
| 593 |
CRYPTO_cfb128_8_encrypt(in, out, len, &dat->ks, |
| 594 |
ctx->iv, &ctx->num, ctx->encrypt, dat->block); |
| 595 |
return 1; |
| 596 |
} |
| 597 |
|
| 598 |
static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 599 |
const unsigned char *in, size_t len) |
| 600 |
{ |
| 601 |
EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; |
| 602 |
|
| 603 |
if (ctx->flags & EVP_CIPH_FLAG_LENGTH_BITS) { |
| 604 |
CRYPTO_cfb128_1_encrypt(in, out, len, &dat->ks, |
| 605 |
ctx->iv, &ctx->num, ctx->encrypt, dat->block); |
| 606 |
return 1; |
| 607 |
} |
| 608 |
|
| 609 |
while (len >= MAXBITCHUNK) { |
| 610 |
CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, &dat->ks, |
| 611 |
ctx->iv, &ctx->num, ctx->encrypt, dat->block); |
| 612 |
len -= MAXBITCHUNK; |
| 613 |
} |
| 614 |
if (len) |
| 615 |
CRYPTO_cfb128_1_encrypt(in, out, len * 8, &dat->ks, |
| 616 |
ctx->iv, &ctx->num, ctx->encrypt, dat->block); |
| 617 |
|
| 618 |
return 1; |
| 619 |
} |
| 620 |
|
| 621 |
static int aes_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 622 |
const unsigned char *in, size_t len) |
| 623 |
{ |
| 624 |
unsigned int num = ctx->num; |
| 625 |
EVP_AES_KEY *dat = (EVP_AES_KEY *) ctx->cipher_data; |
| 626 |
|
| 627 |
if (dat->stream.ctr) |
| 628 |
CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks, |
| 629 |
ctx->iv, ctx->buf, &num, dat->stream.ctr); |
| 630 |
else |
| 631 |
CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, |
| 632 |
ctx->iv, ctx->buf, &num, dat->block); |
| 633 |
ctx->num = (size_t)num; |
| 634 |
return 1; |
| 635 |
} |
| 636 |
|
| 637 |
BLOCK_CIPHER_generic_pack(NID_aes, 128, EVP_CIPH_FLAG_FIPS) |
| 638 |
BLOCK_CIPHER_generic_pack(NID_aes, 192, EVP_CIPH_FLAG_FIPS) |
| 639 |
BLOCK_CIPHER_generic_pack(NID_aes, 256, EVP_CIPH_FLAG_FIPS) |
| 640 |
|
| 641 |
static int aes_gcm_cleanup(EVP_CIPHER_CTX *c) |
| 642 |
{ |
| 643 |
EVP_AES_GCM_CTX *gctx = c->cipher_data; |
| 644 |
OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm)); |
| 645 |
if (gctx->iv != c->iv) |
| 646 |
OPENSSL_free(gctx->iv); |
| 647 |
return 1; |
| 648 |
} |
| 649 |
|
| 650 |
/* increment counter (64-bit int) by 1 */ |
| 651 |
static void ctr64_inc(unsigned char *counter) |
| 652 |
{ |
| 653 |
int n = 8; |
| 654 |
unsigned char c; |
| 655 |
|
| 656 |
do { |
| 657 |
--n; |
| 658 |
c = counter[n]; |
| 659 |
++c; |
| 660 |
counter[n] = c; |
| 661 |
if (c) |
| 662 |
return; |
| 663 |
} while (n); |
| 664 |
} |
| 665 |
|
| 666 |
static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
| 667 |
{ |
| 668 |
EVP_AES_GCM_CTX *gctx = c->cipher_data; |
| 669 |
switch (type) { |
| 670 |
case EVP_CTRL_INIT: |
| 671 |
gctx->key_set = 0; |
| 672 |
gctx->iv_set = 0; |
| 673 |
gctx->ivlen = c->cipher->iv_len; |
| 674 |
gctx->iv = c->iv; |
| 675 |
gctx->taglen = -1; |
| 676 |
gctx->iv_gen = 0; |
| 677 |
gctx->tls_aad_len = -1; |
| 678 |
return 1; |
| 679 |
|
| 680 |
case EVP_CTRL_GCM_SET_IVLEN: |
| 681 |
if (arg <= 0) |
| 682 |
return 0; |
| 683 |
# ifdef OPENSSL_FIPS |
| 684 |
if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) |
| 685 |
&& arg < 12) |
| 686 |
return 0; |
| 687 |
# endif |
| 688 |
/* Allocate memory for IV if needed */ |
| 689 |
if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) { |
| 690 |
if (gctx->iv != c->iv) |
| 691 |
OPENSSL_free(gctx->iv); |
| 692 |
gctx->iv = OPENSSL_malloc(arg); |
| 693 |
if (!gctx->iv) |
| 694 |
return 0; |
| 695 |
} |
| 696 |
gctx->ivlen = arg; |
| 697 |
return 1; |
| 698 |
|
| 699 |
case EVP_CTRL_GCM_SET_TAG: |
| 700 |
if (arg <= 0 || arg > 16 || c->encrypt) |
| 701 |
return 0; |
| 702 |
memcpy(c->buf, ptr, arg); |
| 703 |
gctx->taglen = arg; |
| 704 |
return 1; |
| 705 |
|
| 706 |
case EVP_CTRL_GCM_GET_TAG: |
| 707 |
if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0) |
| 708 |
return 0; |
| 709 |
memcpy(ptr, c->buf, arg); |
| 710 |
return 1; |
| 711 |
|
| 712 |
case EVP_CTRL_GCM_SET_IV_FIXED: |
| 713 |
/* Special case: -1 length restores whole IV */ |
| 714 |
if (arg == -1) { |
| 715 |
memcpy(gctx->iv, ptr, gctx->ivlen); |
| 716 |
gctx->iv_gen = 1; |
| 717 |
return 1; |
| 718 |
} |
| 719 |
/* |
| 720 |
* Fixed field must be at least 4 bytes and invocation field at least |
| 721 |
* 8. |
| 722 |
*/ |
| 723 |
if ((arg < 4) || (gctx->ivlen - arg) < 8) |
| 724 |
return 0; |
| 725 |
if (arg) |
| 726 |
memcpy(gctx->iv, ptr, arg); |
| 727 |
if (c->encrypt && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) |
| 728 |
return 0; |
| 729 |
gctx->iv_gen = 1; |
| 730 |
return 1; |
| 731 |
|
| 732 |
case EVP_CTRL_GCM_IV_GEN: |
| 733 |
if (gctx->iv_gen == 0 || gctx->key_set == 0) |
| 734 |
return 0; |
| 735 |
CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); |
| 736 |
if (arg <= 0 || arg > gctx->ivlen) |
| 737 |
arg = gctx->ivlen; |
| 738 |
memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg); |
| 739 |
/* |
| 740 |
* Invocation field will be at least 8 bytes in size and so no need |
| 741 |
* to check wrap around or increment more than last 8 bytes. |
| 742 |
*/ |
| 743 |
ctr64_inc(gctx->iv + gctx->ivlen - 8); |
| 744 |
gctx->iv_set = 1; |
| 745 |
return 1; |
| 746 |
|
| 747 |
case EVP_CTRL_GCM_SET_IV_INV: |
| 748 |
if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt) |
| 749 |
return 0; |
| 750 |
memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); |
| 751 |
CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); |
| 752 |
gctx->iv_set = 1; |
| 753 |
return 1; |
| 754 |
|
| 755 |
case EVP_CTRL_AEAD_TLS1_AAD: |
| 756 |
/* Save the AAD for later use */ |
| 757 |
if (arg != EVP_AEAD_TLS1_AAD_LEN) |
| 758 |
return 0; |
| 759 |
memcpy(c->buf, ptr, arg); |
| 760 |
gctx->tls_aad_len = arg; |
| 761 |
{ |
| 762 |
unsigned int len = c->buf[arg - 2] << 8 | c->buf[arg - 1]; |
| 763 |
/* Correct length for explicit IV */ |
| 764 |
len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; |
| 765 |
/* If decrypting correct for tag too */ |
| 766 |
if (!c->encrypt) |
| 767 |
len -= EVP_GCM_TLS_TAG_LEN; |
| 768 |
c->buf[arg - 2] = len >> 8; |
| 769 |
c->buf[arg - 1] = len & 0xff; |
| 770 |
} |
| 771 |
/* Extra padding: tag appended to record */ |
| 772 |
return EVP_GCM_TLS_TAG_LEN; |
| 773 |
|
| 774 |
case EVP_CTRL_COPY: |
| 775 |
{ |
| 776 |
EVP_CIPHER_CTX *out = ptr; |
| 777 |
EVP_AES_GCM_CTX *gctx_out = out->cipher_data; |
| 778 |
if (gctx->gcm.key) { |
| 779 |
if (gctx->gcm.key != &gctx->ks) |
| 780 |
return 0; |
| 781 |
gctx_out->gcm.key = &gctx_out->ks; |
| 782 |
} |
| 783 |
if (gctx->iv == c->iv) |
| 784 |
gctx_out->iv = out->iv; |
| 785 |
else { |
| 786 |
gctx_out->iv = OPENSSL_malloc(gctx->ivlen); |
| 787 |
if (!gctx_out->iv) |
| 788 |
return 0; |
| 789 |
memcpy(gctx_out->iv, gctx->iv, gctx->ivlen); |
| 790 |
} |
| 791 |
return 1; |
| 792 |
} |
| 793 |
|
| 794 |
default: |
| 795 |
return -1; |
| 796 |
|
| 797 |
} |
| 798 |
} |
| 799 |
|
| 800 |
static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 801 |
const unsigned char *iv, int enc) |
| 802 |
{ |
| 803 |
EVP_AES_GCM_CTX *gctx = ctx->cipher_data; |
| 804 |
if (!iv && !key) |
| 805 |
return 1; |
| 806 |
if (key) { |
| 807 |
do { |
| 808 |
# ifdef BSAES_CAPABLE |
| 809 |
if (BSAES_CAPABLE) { |
| 810 |
AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); |
| 811 |
CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, |
| 812 |
(block128_f) AES_encrypt); |
| 813 |
gctx->ctr = (ctr128_f) bsaes_ctr32_encrypt_blocks; |
| 814 |
break; |
| 815 |
} else |
| 816 |
# endif |
| 817 |
# ifdef VPAES_CAPABLE |
| 818 |
if (VPAES_CAPABLE) { |
| 819 |
vpaes_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); |
| 820 |
CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, |
| 821 |
(block128_f) vpaes_encrypt); |
| 822 |
gctx->ctr = NULL; |
| 823 |
break; |
| 824 |
} else |
| 825 |
# endif |
| 826 |
(void)0; /* terminate potentially open 'else' */ |
| 827 |
|
| 828 |
AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); |
| 829 |
CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, |
| 830 |
(block128_f) AES_encrypt); |
| 831 |
# ifdef AES_CTR_ASM |
| 832 |
gctx->ctr = (ctr128_f) AES_ctr32_encrypt; |
| 833 |
# else |
| 834 |
gctx->ctr = NULL; |
| 835 |
# endif |
| 836 |
} while (0); |
| 837 |
|
| 838 |
/* |
| 839 |
* If we have an iv can set it directly, otherwise use saved IV. |
| 840 |
*/ |
| 841 |
if (iv == NULL && gctx->iv_set) |
| 842 |
iv = gctx->iv; |
| 843 |
if (iv) { |
| 844 |
CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
| 845 |
gctx->iv_set = 1; |
| 846 |
} |
| 847 |
gctx->key_set = 1; |
| 848 |
} else { |
| 849 |
/* If key set use IV, otherwise copy */ |
| 850 |
if (gctx->key_set) |
| 851 |
CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); |
| 852 |
else |
| 853 |
memcpy(gctx->iv, iv, gctx->ivlen); |
| 854 |
gctx->iv_set = 1; |
| 855 |
gctx->iv_gen = 0; |
| 856 |
} |
| 857 |
return 1; |
| 858 |
} |
| 859 |
|
| 860 |
/* |
| 861 |
* Handle TLS GCM packet format. This consists of the last portion of the IV |
| 862 |
* followed by the payload and finally the tag. On encrypt generate IV, |
| 863 |
* encrypt payload and write the tag. On verify retrieve IV, decrypt payload |
| 864 |
* and verify tag. |
| 865 |
*/ |
| 866 |
|
| 867 |
static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 868 |
const unsigned char *in, size_t len) |
| 869 |
{ |
| 870 |
EVP_AES_GCM_CTX *gctx = ctx->cipher_data; |
| 871 |
int rv = -1; |
| 872 |
/* Encrypt/decrypt must be performed in place */ |
| 873 |
if (out != in |
| 874 |
|| len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN)) |
| 875 |
return -1; |
| 876 |
/* |
| 877 |
* Set IV from start of buffer or generate IV and write to start of |
| 878 |
* buffer. |
| 879 |
*/ |
| 880 |
if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ? |
| 881 |
EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV, |
| 882 |
EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) |
| 883 |
goto err; |
| 884 |
/* Use saved AAD */ |
| 885 |
if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len)) |
| 886 |
goto err; |
| 887 |
/* Fix buffer and length to point to payload */ |
| 888 |
in += EVP_GCM_TLS_EXPLICIT_IV_LEN; |
| 889 |
out += EVP_GCM_TLS_EXPLICIT_IV_LEN; |
| 890 |
len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; |
| 891 |
if (ctx->encrypt) { |
| 892 |
/* Encrypt payload */ |
| 893 |
if (gctx->ctr) { |
| 894 |
if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, |
| 895 |
in, out, len, gctx->ctr)) |
| 896 |
goto err; |
| 897 |
} else { |
| 898 |
if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) |
| 899 |
goto err; |
| 900 |
} |
| 901 |
out += len; |
| 902 |
/* Finally write tag */ |
| 903 |
CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN); |
| 904 |
rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; |
| 905 |
} else { |
| 906 |
/* Decrypt */ |
| 907 |
if (gctx->ctr) { |
| 908 |
if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, |
| 909 |
in, out, len, gctx->ctr)) |
| 910 |
goto err; |
| 911 |
} else { |
| 912 |
if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) |
| 913 |
goto err; |
| 914 |
} |
| 915 |
/* Retrieve tag */ |
| 916 |
CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, EVP_GCM_TLS_TAG_LEN); |
| 917 |
/* If tag mismatch wipe buffer */ |
| 918 |
if (CRYPTO_memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) { |
| 919 |
OPENSSL_cleanse(out, len); |
| 920 |
goto err; |
| 921 |
} |
| 922 |
rv = len; |
| 923 |
} |
| 924 |
|
| 925 |
err: |
| 926 |
gctx->iv_set = 0; |
| 927 |
gctx->tls_aad_len = -1; |
| 928 |
return rv; |
| 929 |
} |
| 930 |
|
| 931 |
static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 932 |
const unsigned char *in, size_t len) |
| 933 |
{ |
| 934 |
EVP_AES_GCM_CTX *gctx = ctx->cipher_data; |
| 935 |
/* If not set up, return error */ |
| 936 |
if (!gctx->key_set) |
| 937 |
return -1; |
| 938 |
|
| 939 |
if (gctx->tls_aad_len >= 0) |
| 940 |
return aes_gcm_tls_cipher(ctx, out, in, len); |
| 941 |
|
| 942 |
if (!gctx->iv_set) |
| 943 |
return -1; |
| 944 |
if (in) { |
| 945 |
if (out == NULL) { |
| 946 |
if (CRYPTO_gcm128_aad(&gctx->gcm, in, len)) |
| 947 |
return -1; |
| 948 |
} else if (ctx->encrypt) { |
| 949 |
if (gctx->ctr) { |
| 950 |
if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, |
| 951 |
in, out, len, gctx->ctr)) |
| 952 |
return -1; |
| 953 |
} else { |
| 954 |
if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) |
| 955 |
return -1; |
| 956 |
} |
| 957 |
} else { |
| 958 |
if (gctx->ctr) { |
| 959 |
if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, |
| 960 |
in, out, len, gctx->ctr)) |
| 961 |
return -1; |
| 962 |
} else { |
| 963 |
if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) |
| 964 |
return -1; |
| 965 |
} |
| 966 |
} |
| 967 |
return len; |
| 968 |
} else { |
| 969 |
if (!ctx->encrypt) { |
| 970 |
if (gctx->taglen < 0) |
| 971 |
return -1; |
| 972 |
if (CRYPTO_gcm128_finish(&gctx->gcm, ctx->buf, gctx->taglen) != 0) |
| 973 |
return -1; |
| 974 |
gctx->iv_set = 0; |
| 975 |
return 0; |
| 976 |
} |
| 977 |
CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16); |
| 978 |
gctx->taglen = 16; |
| 979 |
/* Don't reuse the IV */ |
| 980 |
gctx->iv_set = 0; |
| 981 |
return 0; |
| 982 |
} |
| 983 |
|
| 984 |
} |
| 985 |
|
| 986 |
# define CUSTOM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ |
| 987 |
| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ |
| 988 |
| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ |
| 989 |
| EVP_CIPH_CUSTOM_COPY) |
| 990 |
|
| 991 |
BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, gcm, GCM, |
| 992 |
EVP_CIPH_FLAG_FIPS | EVP_CIPH_FLAG_AEAD_CIPHER | |
| 993 |
CUSTOM_FLAGS) |
| 994 |
BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, gcm, GCM, |
| 995 |
EVP_CIPH_FLAG_FIPS | EVP_CIPH_FLAG_AEAD_CIPHER | |
| 996 |
CUSTOM_FLAGS) |
| 997 |
BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, gcm, GCM, |
| 998 |
EVP_CIPH_FLAG_FIPS | EVP_CIPH_FLAG_AEAD_CIPHER | |
| 999 |
CUSTOM_FLAGS) |
| 1000 |
|
| 1001 |
static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
| 1002 |
{ |
| 1003 |
EVP_AES_XTS_CTX *xctx = c->cipher_data; |
| 1004 |
if (type == EVP_CTRL_COPY) { |
| 1005 |
EVP_CIPHER_CTX *out = ptr; |
| 1006 |
EVP_AES_XTS_CTX *xctx_out = out->cipher_data; |
| 1007 |
if (xctx->xts.key1) { |
| 1008 |
if (xctx->xts.key1 != &xctx->ks1) |
| 1009 |
return 0; |
| 1010 |
xctx_out->xts.key1 = &xctx_out->ks1; |
| 1011 |
} |
| 1012 |
if (xctx->xts.key2) { |
| 1013 |
if (xctx->xts.key2 != &xctx->ks2) |
| 1014 |
return 0; |
| 1015 |
xctx_out->xts.key2 = &xctx_out->ks2; |
| 1016 |
} |
| 1017 |
return 1; |
| 1018 |
} else if (type != EVP_CTRL_INIT) |
| 1019 |
return -1; |
| 1020 |
/* key1 and key2 are used as an indicator both key and IV are set */ |
| 1021 |
xctx->xts.key1 = NULL; |
| 1022 |
xctx->xts.key2 = NULL; |
| 1023 |
return 1; |
| 1024 |
} |
| 1025 |
|
| 1026 |
static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 1027 |
const unsigned char *iv, int enc) |
| 1028 |
{ |
| 1029 |
EVP_AES_XTS_CTX *xctx = ctx->cipher_data; |
| 1030 |
if (!iv && !key) |
| 1031 |
return 1; |
| 1032 |
|
| 1033 |
if (key) |
| 1034 |
do { |
| 1035 |
# ifdef AES_XTS_ASM |
| 1036 |
xctx->stream = enc ? AES_xts_encrypt : AES_xts_decrypt; |
| 1037 |
# else |
| 1038 |
xctx->stream = NULL; |
| 1039 |
# endif |
| 1040 |
/* key_len is two AES keys */ |
| 1041 |
# ifdef BSAES_CAPABLE |
| 1042 |
if (BSAES_CAPABLE) |
| 1043 |
xctx->stream = enc ? bsaes_xts_encrypt : bsaes_xts_decrypt; |
| 1044 |
else |
| 1045 |
# endif |
| 1046 |
# ifdef VPAES_CAPABLE |
| 1047 |
if (VPAES_CAPABLE) { |
| 1048 |
if (enc) { |
| 1049 |
vpaes_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 1050 |
xctx->xts.block1 = (block128_f) vpaes_encrypt; |
| 1051 |
} else { |
| 1052 |
vpaes_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 1053 |
xctx->xts.block1 = (block128_f) vpaes_decrypt; |
| 1054 |
} |
| 1055 |
|
| 1056 |
vpaes_set_encrypt_key(key + ctx->key_len / 2, |
| 1057 |
ctx->key_len * 4, &xctx->ks2); |
| 1058 |
xctx->xts.block2 = (block128_f) vpaes_encrypt; |
| 1059 |
|
| 1060 |
xctx->xts.key1 = &xctx->ks1; |
| 1061 |
break; |
| 1062 |
} else |
| 1063 |
# endif |
| 1064 |
(void)0; /* terminate potentially open 'else' */ |
| 1065 |
|
| 1066 |
if (enc) { |
| 1067 |
AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 1068 |
xctx->xts.block1 = (block128_f) AES_encrypt; |
| 1069 |
} else { |
| 1070 |
AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); |
| 1071 |
xctx->xts.block1 = (block128_f) AES_decrypt; |
| 1072 |
} |
| 1073 |
|
| 1074 |
AES_set_encrypt_key(key + ctx->key_len / 2, |
| 1075 |
ctx->key_len * 4, &xctx->ks2); |
| 1076 |
xctx->xts.block2 = (block128_f) AES_encrypt; |
| 1077 |
|
| 1078 |
xctx->xts.key1 = &xctx->ks1; |
| 1079 |
} while (0); |
| 1080 |
|
| 1081 |
if (iv) { |
| 1082 |
xctx->xts.key2 = &xctx->ks2; |
| 1083 |
memcpy(ctx->iv, iv, 16); |
| 1084 |
} |
| 1085 |
|
| 1086 |
return 1; |
| 1087 |
} |
| 1088 |
|
| 1089 |
static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 1090 |
const unsigned char *in, size_t len) |
| 1091 |
{ |
| 1092 |
EVP_AES_XTS_CTX *xctx = ctx->cipher_data; |
| 1093 |
if (!xctx->xts.key1 || !xctx->xts.key2) |
| 1094 |
return 0; |
| 1095 |
if (!out || !in || len < AES_BLOCK_SIZE) |
| 1096 |
return 0; |
| 1097 |
# ifdef OPENSSL_FIPS |
| 1098 |
/* Requirement of SP800-38E */ |
| 1099 |
if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) && |
| 1100 |
(len > (1UL << 20) * 16)) { |
| 1101 |
EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE); |
| 1102 |
return 0; |
| 1103 |
} |
| 1104 |
# endif |
| 1105 |
if (xctx->stream) |
| 1106 |
(*xctx->stream) (in, out, len, |
| 1107 |
xctx->xts.key1, xctx->xts.key2, ctx->iv); |
| 1108 |
else if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len, |
| 1109 |
ctx->encrypt)) |
| 1110 |
return 0; |
| 1111 |
return 1; |
| 1112 |
} |
| 1113 |
|
| 1114 |
# define aes_xts_cleanup NULL |
| 1115 |
|
| 1116 |
# define XTS_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV \ |
| 1117 |
| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ |
| 1118 |
| EVP_CIPH_CUSTOM_COPY) |
| 1119 |
|
| 1120 |
BLOCK_CIPHER_custom(NID_aes, 128, 1, 16, xts, XTS, |
| 1121 |
EVP_CIPH_FLAG_FIPS | XTS_FLAGS) |
| 1122 |
BLOCK_CIPHER_custom(NID_aes, 256, 1, 16, xts, XTS, |
| 1123 |
EVP_CIPH_FLAG_FIPS | XTS_FLAGS) |
| 1124 |
|
| 1125 |
static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
| 1126 |
{ |
| 1127 |
EVP_AES_CCM_CTX *cctx = c->cipher_data; |
| 1128 |
switch (type) { |
| 1129 |
case EVP_CTRL_INIT: |
| 1130 |
cctx->key_set = 0; |
| 1131 |
cctx->iv_set = 0; |
| 1132 |
cctx->L = 8; |
| 1133 |
cctx->M = 12; |
| 1134 |
cctx->tag_set = 0; |
| 1135 |
cctx->len_set = 0; |
| 1136 |
return 1; |
| 1137 |
|
| 1138 |
case EVP_CTRL_CCM_SET_IVLEN: |
| 1139 |
arg = 15 - arg; |
| 1140 |
case EVP_CTRL_CCM_SET_L: |
| 1141 |
if (arg < 2 || arg > 8) |
| 1142 |
return 0; |
| 1143 |
cctx->L = arg; |
| 1144 |
return 1; |
| 1145 |
|
| 1146 |
case EVP_CTRL_CCM_SET_TAG: |
| 1147 |
if ((arg & 1) || arg < 4 || arg > 16) |
| 1148 |
return 0; |
| 1149 |
if (c->encrypt && ptr) |
| 1150 |
return 0; |
| 1151 |
if (ptr) { |
| 1152 |
cctx->tag_set = 1; |
| 1153 |
memcpy(c->buf, ptr, arg); |
| 1154 |
} |
| 1155 |
cctx->M = arg; |
| 1156 |
return 1; |
| 1157 |
|
| 1158 |
case EVP_CTRL_CCM_GET_TAG: |
| 1159 |
if (!c->encrypt || !cctx->tag_set) |
| 1160 |
return 0; |
| 1161 |
if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg)) |
| 1162 |
return 0; |
| 1163 |
cctx->tag_set = 0; |
| 1164 |
cctx->iv_set = 0; |
| 1165 |
cctx->len_set = 0; |
| 1166 |
return 1; |
| 1167 |
|
| 1168 |
case EVP_CTRL_COPY: |
| 1169 |
{ |
| 1170 |
EVP_CIPHER_CTX *out = ptr; |
| 1171 |
EVP_AES_CCM_CTX *cctx_out = out->cipher_data; |
| 1172 |
if (cctx->ccm.key) { |
| 1173 |
if (cctx->ccm.key != &cctx->ks) |
| 1174 |
return 0; |
| 1175 |
cctx_out->ccm.key = &cctx_out->ks; |
| 1176 |
} |
| 1177 |
return 1; |
| 1178 |
} |
| 1179 |
|
| 1180 |
default: |
| 1181 |
return -1; |
| 1182 |
|
| 1183 |
} |
| 1184 |
} |
| 1185 |
|
| 1186 |
static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 1187 |
const unsigned char *iv, int enc) |
| 1188 |
{ |
| 1189 |
EVP_AES_CCM_CTX *cctx = ctx->cipher_data; |
| 1190 |
if (!iv && !key) |
| 1191 |
return 1; |
| 1192 |
if (key) |
| 1193 |
do { |
| 1194 |
# ifdef VPAES_CAPABLE |
| 1195 |
if (VPAES_CAPABLE) { |
| 1196 |
vpaes_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); |
| 1197 |
CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, |
| 1198 |
&cctx->ks, (block128_f) vpaes_encrypt); |
| 1199 |
cctx->str = NULL; |
| 1200 |
cctx->key_set = 1; |
| 1201 |
break; |
| 1202 |
} |
| 1203 |
# endif |
| 1204 |
AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); |
| 1205 |
CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, |
| 1206 |
&cctx->ks, (block128_f) AES_encrypt); |
| 1207 |
cctx->str = NULL; |
| 1208 |
cctx->key_set = 1; |
| 1209 |
} while (0); |
| 1210 |
if (iv) { |
| 1211 |
memcpy(ctx->iv, iv, 15 - cctx->L); |
| 1212 |
cctx->iv_set = 1; |
| 1213 |
} |
| 1214 |
return 1; |
| 1215 |
} |
| 1216 |
|
| 1217 |
static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 1218 |
const unsigned char *in, size_t len) |
| 1219 |
{ |
| 1220 |
EVP_AES_CCM_CTX *cctx = ctx->cipher_data; |
| 1221 |
CCM128_CONTEXT *ccm = &cctx->ccm; |
| 1222 |
/* If not set up, return error */ |
| 1223 |
if (!cctx->iv_set && !cctx->key_set) |
| 1224 |
return -1; |
| 1225 |
if (!ctx->encrypt && !cctx->tag_set) |
| 1226 |
return -1; |
| 1227 |
if (!out) { |
| 1228 |
if (!in) { |
| 1229 |
if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) |
| 1230 |
return -1; |
| 1231 |
cctx->len_set = 1; |
| 1232 |
return len; |
| 1233 |
} |
| 1234 |
/* If have AAD need message length */ |
| 1235 |
if (!cctx->len_set && len) |
| 1236 |
return -1; |
| 1237 |
CRYPTO_ccm128_aad(ccm, in, len); |
| 1238 |
return len; |
| 1239 |
} |
| 1240 |
/* EVP_*Final() doesn't return any data */ |
| 1241 |
if (!in) |
| 1242 |
return 0; |
| 1243 |
/* If not set length yet do it */ |
| 1244 |
if (!cctx->len_set) { |
| 1245 |
if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) |
| 1246 |
return -1; |
| 1247 |
cctx->len_set = 1; |
| 1248 |
} |
| 1249 |
if (ctx->encrypt) { |
| 1250 |
if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, |
| 1251 |
cctx->str) : |
| 1252 |
CRYPTO_ccm128_encrypt(ccm, in, out, len)) |
| 1253 |
return -1; |
| 1254 |
cctx->tag_set = 1; |
| 1255 |
return len; |
| 1256 |
} else { |
| 1257 |
int rv = -1; |
| 1258 |
if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, |
| 1259 |
cctx->str) : |
| 1260 |
!CRYPTO_ccm128_decrypt(ccm, in, out, len)) { |
| 1261 |
unsigned char tag[16]; |
| 1262 |
if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) { |
| 1263 |
if (!CRYPTO_memcmp(tag, ctx->buf, cctx->M)) |
| 1264 |
rv = len; |
| 1265 |
} |
| 1266 |
} |
| 1267 |
if (rv == -1) |
| 1268 |
OPENSSL_cleanse(out, len); |
| 1269 |
cctx->iv_set = 0; |
| 1270 |
cctx->tag_set = 0; |
| 1271 |
cctx->len_set = 0; |
| 1272 |
return rv; |
| 1273 |
} |
| 1274 |
|
| 1275 |
} |
| 1276 |
|
| 1277 |
# define aes_ccm_cleanup NULL |
| 1278 |
|
| 1279 |
BLOCK_CIPHER_custom(NID_aes, 128, 1, 12, ccm, CCM, |
| 1280 |
EVP_CIPH_FLAG_FIPS | CUSTOM_FLAGS) |
| 1281 |
BLOCK_CIPHER_custom(NID_aes, 192, 1, 12, ccm, CCM, |
| 1282 |
EVP_CIPH_FLAG_FIPS | CUSTOM_FLAGS) |
| 1283 |
BLOCK_CIPHER_custom(NID_aes, 256, 1, 12, ccm, CCM, |
| 1284 |
EVP_CIPH_FLAG_FIPS | CUSTOM_FLAGS) |
| 1285 |
# endif |
| 1286 |
#endif |
