Mercurial > dropbear
comparison eax_decrypt.c @ 3:7faae8f46238 libtomcrypt-orig
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| author | Matt Johnston <matt@ucc.asn.au> |
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| date | Mon, 31 May 2004 18:25:41 +0000 |
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| children |
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| -1:000000000000 | 3:7faae8f46238 |
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| 1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis | |
| 2 * | |
| 3 * LibTomCrypt is a library that provides various cryptographic | |
| 4 * algorithms in a highly modular and flexible manner. | |
| 5 * | |
| 6 * The library is free for all purposes without any express | |
| 7 * guarantee it works. | |
| 8 * | |
| 9 * Tom St Denis, [email protected], http://libtomcrypt.org | |
| 10 */ | |
| 11 | |
| 12 /* EAX Implementation by Tom St Denis */ | |
| 13 #include "mycrypt.h" | |
| 14 | |
| 15 #ifdef EAX_MODE | |
| 16 | |
| 17 int eax_decrypt(eax_state *eax, const unsigned char *ct, unsigned char *pt, unsigned long length) | |
| 18 { | |
| 19 int err; | |
| 20 | |
| 21 _ARGCHK(eax != NULL); | |
| 22 _ARGCHK(pt != NULL); | |
| 23 _ARGCHK(ct != NULL); | |
| 24 | |
| 25 /* omac ciphertext */ | |
| 26 if ((err = omac_process(&eax->ctomac, ct, length)) != CRYPT_OK) { | |
| 27 return err; | |
| 28 } | |
| 29 | |
| 30 /* decrypt */ | |
| 31 return ctr_decrypt(ct, pt, length, &eax->ctr); | |
| 32 } | |
| 33 | |
| 34 #endif |