diff options
Diffstat (limited to 'src/modes/ctr/ctr_encrypt.c')
| -rw-r--r-- | src/modes/ctr/ctr_encrypt.c | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/src/modes/ctr/ctr_encrypt.c b/src/modes/ctr/ctr_encrypt.c index 79795ae..84dd65b 100644 --- a/src/modes/ctr/ctr_encrypt.c +++ b/src/modes/ctr/ctr_encrypt.c @@ -6,7 +6,7 @@ * The library is free for all purposes without any express * guarantee it works. * - * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org + * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com */ #include "tomcrypt.h" @@ -16,7 +16,7 @@ */ -#ifdef CTR +#ifdef LTC_CTR_MODE /** CTR encrypt @@ -39,7 +39,7 @@ int ctr_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, s } /* is blocklen/padlen valid? */ - if (ctr->blocklen < 0 || ctr->blocklen > (int)sizeof(ctr->ctr) || + if (ctr->blocklen < 1 || ctr->blocklen > (int)sizeof(ctr->ctr) || ctr->padlen < 0 || ctr->padlen > (int)sizeof(ctr->pad)) { return CRYPT_INVALID_ARG; } @@ -52,7 +52,9 @@ int ctr_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, s /* handle acceleration only if pad is empty, accelerator is present and length is >= a block size */ if ((ctr->padlen == ctr->blocklen) && cipher_descriptor[ctr->cipher].accel_ctr_encrypt != NULL && (len >= (unsigned long)ctr->blocklen)) { - cipher_descriptor[ctr->cipher].accel_ctr_encrypt(pt, ct, len/ctr->blocklen, ctr->ctr, ctr->mode, &ctr->key); + if ((err = cipher_descriptor[ctr->cipher].accel_ctr_encrypt(pt, ct, len/ctr->blocklen, ctr->ctr, ctr->mode, &ctr->key)) != CRYPT_OK) { + return err; + } len %= ctr->blocklen; } @@ -79,7 +81,9 @@ int ctr_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, s } /* encrypt it */ - cipher_descriptor[ctr->cipher].ecb_encrypt(ctr->ctr, ctr->pad, &ctr->key); + if ((err = cipher_descriptor[ctr->cipher].ecb_encrypt(ctr->ctr, ctr->pad, &ctr->key)) != CRYPT_OK) { + return err; + } ctr->padlen = 0; } #ifdef LTC_FAST @@ -88,15 +92,15 @@ int ctr_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, s *((LTC_FAST_TYPE*)((unsigned char *)ct + x)) = *((LTC_FAST_TYPE*)((unsigned char *)pt + x)) ^ *((LTC_FAST_TYPE*)((unsigned char *)ctr->pad + x)); } - pt += ctr->blocklen; - ct += ctr->blocklen; - len -= ctr->blocklen; - ctr->padlen = ctr->blocklen; - continue; - } -#endif - *ct++ = *pt++ ^ ctr->pad[ctr->padlen++]; - --len; + pt += ctr->blocklen; + ct += ctr->blocklen; + len -= ctr->blocklen; + ctr->padlen = ctr->blocklen; + continue; + } +#endif + *ct++ = *pt++ ^ ctr->pad[ctr->padlen++]; + --len; } return CRYPT_OK; } @@ -104,5 +108,5 @@ int ctr_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, s #endif /* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_encrypt.c,v $ */ -/* $Revision: 1.13 $ */ -/* $Date: 2005/05/05 14:35:59 $ */ +/* $Revision: 1.20 $ */ +/* $Date: 2006/11/21 00:18:23 $ */ |