diff options
Diffstat (limited to 'libtomcrypt/src/modes/cbc/cbc_encrypt.c')
-rw-r--r-- | libtomcrypt/src/modes/cbc/cbc_encrypt.c | 54 |
1 files changed, 26 insertions, 28 deletions
diff --git a/libtomcrypt/src/modes/cbc/cbc_encrypt.c b/libtomcrypt/src/modes/cbc/cbc_encrypt.c index 1f28204..00d85fc 100644 --- a/libtomcrypt/src/modes/cbc/cbc_encrypt.c +++ b/libtomcrypt/src/modes/cbc/cbc_encrypt.c @@ -5,8 +5,6 @@ * * The library is free for all purposes without any express * guarantee it works. - * - * Tom St Denis, tomstdenis@gmail.com, http://libtom.org */ #include "tomcrypt.h" @@ -37,17 +35,17 @@ int cbc_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, s if ((err = cipher_is_valid(cbc->cipher)) != CRYPT_OK) { return err; } - + /* is blocklen valid? */ if (cbc->blocklen < 1 || cbc->blocklen > (int)sizeof(cbc->IV)) { return CRYPT_INVALID_ARG; - } + } if (len % cbc->blocklen) { return CRYPT_INVALID_ARG; } #ifdef LTC_FAST - if (cbc->blocklen % sizeof(LTC_FAST_TYPE)) { + if (cbc->blocklen % sizeof(LTC_FAST_TYPE)) { return CRYPT_INVALID_ARG; } #endif @@ -58,13 +56,13 @@ int cbc_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, s while (len) { /* xor IV against plaintext */ #if defined(LTC_FAST) - for (x = 0; x < cbc->blocklen; x += sizeof(LTC_FAST_TYPE)) { - *((LTC_FAST_TYPE*)((unsigned char *)cbc->IV + x)) ^= *((LTC_FAST_TYPE*)((unsigned char *)pt + x)); - } - #else - for (x = 0; x < cbc->blocklen; x++) { - cbc->IV[x] ^= pt[x]; - } + for (x = 0; x < cbc->blocklen; x += sizeof(LTC_FAST_TYPE)) { + *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)cbc->IV + x)) ^= *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)pt + x)); + } + #else + for (x = 0; x < cbc->blocklen; x++) { + cbc->IV[x] ^= pt[x]; + } #endif /* encrypt */ @@ -72,27 +70,27 @@ int cbc_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, s return err; } - /* store IV [ciphertext] for a future block */ + /* store IV [ciphertext] for a future block */ #if defined(LTC_FAST) - for (x = 0; x < cbc->blocklen; x += sizeof(LTC_FAST_TYPE)) { - *((LTC_FAST_TYPE*)((unsigned char *)cbc->IV + x)) = *((LTC_FAST_TYPE*)((unsigned char *)ct + x)); - } - #else - for (x = 0; x < cbc->blocklen; x++) { - cbc->IV[x] = ct[x]; - } + for (x = 0; x < cbc->blocklen; x += sizeof(LTC_FAST_TYPE)) { + *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)cbc->IV + x)) = *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)ct + x)); + } + #else + for (x = 0; x < cbc->blocklen; x++) { + cbc->IV[x] = ct[x]; + } #endif - - ct += cbc->blocklen; - pt += cbc->blocklen; - len -= cbc->blocklen; - } + + ct += cbc->blocklen; + pt += cbc->blocklen; + len -= cbc->blocklen; + } } return CRYPT_OK; } #endif -/* $Source$ */ -/* $Revision$ */ -/* $Date$ */ +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ |