diff options
Diffstat (limited to 'security/nss/lib/freebl/rijndael.h')
| -rw-r--r-- | security/nss/lib/freebl/rijndael.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/rijndael.h b/security/nss/lib/freebl/rijndael.h new file mode 100644 index 0000000000..6a69a38199 --- /dev/null +++ b/security/nss/lib/freebl/rijndael.h @@ -0,0 +1,80 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef _RIJNDAEL_H_ +#define _RIJNDAEL_H_ 1 + +#include "blapii.h" +#include <stdint.h> + +#if defined(NSS_X86_OR_X64) +/* GCC <= 4.8 doesn't support including emmintrin.h without enabling SSE2 */ +#if !defined(__clang__) && defined(__GNUC__) && defined(__GNUC_MINOR__) && \ + (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ <= 8)) +#pragma GCC push_options +#pragma GCC target("sse2") +#undef NSS_DISABLE_SSE2 +#define NSS_DISABLE_SSE2 1 +#endif /* GCC <= 4.8 */ + +#include <emmintrin.h> /* __m128i */ + +#ifdef NSS_DISABLE_SSE2 +#undef NSS_DISABLE_SSE2 +#pragma GCC pop_options +#endif /* NSS_DISABLE_SSE2 */ +#endif + +/* RIJNDAEL_NUM_ROUNDS + * + * Number of rounds per execution + * Nk - number of key bytes + * Nb - blocksize (in bytes) + */ +#define RIJNDAEL_NUM_ROUNDS(Nk, Nb) \ + (PR_MAX(Nk, Nb) + 6) + +/* + * This magic number is (Nb_max * (Nr_max + 1)) + * where Nb_max is the maximum block size in 32-bit words, + * Nr_max is the maximum number of rounds, which is Nb_max + 6 + */ +#define RIJNDAEL_MAX_EXP_KEY_SIZE (4 * 15) + +/* AESContextStr + * + * Values which maintain the state for Rijndael encryption/decryption. + * + * keySchedule - 128-bit registers for the key-schedule + * iv - initialization vector for CBC mode + * Nb - the number of bytes in a block, specified by user + * Nr - the number of rounds, specified by a table + * expandedKey - the round keys in 4-byte words, the length is Nr * Nb + * worker - the encryption/decryption function to use with worker_cx + * destroy - if not NULL, the destroy function to use with worker_cx + * worker_cx - the context for worker and destroy + * isBlock - is the mode of operation a block cipher or a stream cipher? + */ +struct AESContextStr { + /* NOTE: Offsets to members in this struct are hardcoded in assembly. + * Don't change the struct without updating intel-aes.s and intel-gcm.s. */ + union { +#if defined(NSS_X86_OR_X64) + __m128i keySchedule[15]; +#endif + PRUint32 expandedKey[RIJNDAEL_MAX_EXP_KEY_SIZE]; + } k; + unsigned int Nb; + unsigned int Nr; + freeblCipherFunc worker; + unsigned char iv[AES_BLOCK_SIZE]; + freeblAeadFunc worker_aead; + freeblDestroyFunc destroy; + void *worker_cx; + PRBool isBlock; + int mode; + void *mem; /* Start of the allocated memory to free. */ +}; + +#endif /* _RIJNDAEL_H_ */ |