diff options
Diffstat (limited to 'libtomcrypt/src/modes/ctr')
| -rw-r--r-- | libtomcrypt/src/modes/ctr/ctr_decrypt.c | 8 | ||||
| -rw-r--r-- | libtomcrypt/src/modes/ctr/ctr_done.c | 8 | ||||
| -rw-r--r-- | libtomcrypt/src/modes/ctr/ctr_encrypt.c | 36 | ||||
| -rw-r--r-- | libtomcrypt/src/modes/ctr/ctr_getiv.c | 9 | ||||
| -rw-r--r-- | libtomcrypt/src/modes/ctr/ctr_setiv.c | 12 | ||||
| -rw-r--r-- | libtomcrypt/src/modes/ctr/ctr_start.c | 35 | ||||
| -rw-r--r-- | libtomcrypt/src/modes/ctr/ctr_test.c | 85 |
7 files changed, 151 insertions, 42 deletions
diff --git a/libtomcrypt/src/modes/ctr/ctr_decrypt.c b/libtomcrypt/src/modes/ctr/ctr_decrypt.c index e1d1d51..f32821f 100644 --- a/libtomcrypt/src/modes/ctr/ctr_decrypt.c +++ b/libtomcrypt/src/modes/ctr/ctr_decrypt.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" @@ -15,7 +15,7 @@ CTR implementation, decrypt data, Tom St Denis */ -#ifdef CTR +#ifdef LTC_CTR_MODE /** CTR decrypt @@ -38,5 +38,5 @@ int ctr_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, s /* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_decrypt.c,v $ */ -/* $Revision: 1.3 $ */ -/* $Date: 2005/05/05 14:35:59 $ */ +/* $Revision: 1.5 $ */ +/* $Date: 2006/06/29 01:46:46 $ */ diff --git a/libtomcrypt/src/modes/ctr/ctr_done.c b/libtomcrypt/src/modes/ctr/ctr_done.c index f2e79ba..074c8b6 100644 --- a/libtomcrypt/src/modes/ctr/ctr_done.c +++ b/libtomcrypt/src/modes/ctr/ctr_done.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" @@ -15,7 +15,7 @@ CTR implementation, finish chain, Tom St Denis */ -#ifdef CTR +#ifdef LTC_CTR_MODE /** Terminate the chain @param ctr The CTR chain to terminate @@ -38,5 +38,5 @@ int ctr_done(symmetric_CTR *ctr) #endif /* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_done.c,v $ */ -/* $Revision: 1.4 $ */ -/* $Date: 2005/05/05 14:35:59 $ */ +/* $Revision: 1.6 $ */ +/* $Date: 2006/06/29 01:46:46 $ */ diff --git a/libtomcrypt/src/modes/ctr/ctr_encrypt.c b/libtomcrypt/src/modes/ctr/ctr_encrypt.c index 79795ae..84dd65b 100644 --- a/libtomcrypt/src/modes/ctr/ctr_encrypt.c +++ b/libtomcrypt/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 $ */ diff --git a/libtomcrypt/src/modes/ctr/ctr_getiv.c b/libtomcrypt/src/modes/ctr/ctr_getiv.c index 50ce6a0..2fbf888 100644 --- a/libtomcrypt/src/modes/ctr/ctr_getiv.c +++ b/libtomcrypt/src/modes/ctr/ctr_getiv.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" @@ -15,7 +15,7 @@ CTR implementation, get IV, Tom St Denis */ -#ifdef CTR +#ifdef LTC_CTR_MODE /** Get the current initial vector @@ -30,6 +30,7 @@ int ctr_getiv(unsigned char *IV, unsigned long *len, symmetric_CTR *ctr) LTC_ARGCHK(len != NULL); LTC_ARGCHK(ctr != NULL); if ((unsigned long)ctr->blocklen > *len) { + *len = ctr->blocklen; return CRYPT_BUFFER_OVERFLOW; } XMEMCPY(IV, ctr->ctr, ctr->blocklen); @@ -41,5 +42,5 @@ int ctr_getiv(unsigned char *IV, unsigned long *len, symmetric_CTR *ctr) #endif /* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_getiv.c,v $ */ -/* $Revision: 1.3 $ */ -/* $Date: 2005/05/05 14:35:59 $ */ +/* $Revision: 1.6 $ */ +/* $Date: 2006/06/29 01:46:46 $ */ diff --git a/libtomcrypt/src/modes/ctr/ctr_setiv.c b/libtomcrypt/src/modes/ctr/ctr_setiv.c index 64d4c43..8e8649f 100644 --- a/libtomcrypt/src/modes/ctr/ctr_setiv.c +++ b/libtomcrypt/src/modes/ctr/ctr_setiv.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" @@ -15,7 +15,7 @@ CTR implementation, set IV, Tom St Denis */ -#ifdef CTR +#ifdef LTC_CTR_MODE /** Set an initial vector @@ -45,14 +45,12 @@ int ctr_setiv(const unsigned char *IV, unsigned long len, symmetric_CTR *ctr) /* force next block */ ctr->padlen = 0; - cipher_descriptor[ctr->cipher].ecb_encrypt(IV, ctr->pad, &ctr->key); - - return CRYPT_OK; + return cipher_descriptor[ctr->cipher].ecb_encrypt(IV, ctr->pad, &ctr->key); } #endif /* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_setiv.c,v $ */ -/* $Revision: 1.3 $ */ -/* $Date: 2005/05/05 14:35:59 $ */ +/* $Revision: 1.6 $ */ +/* $Date: 2006/06/29 01:46:46 $ */ diff --git a/libtomcrypt/src/modes/ctr/ctr_start.c b/libtomcrypt/src/modes/ctr/ctr_start.c index 7c7eebb..895c8a4 100644 --- a/libtomcrypt/src/modes/ctr/ctr_start.c +++ b/libtomcrypt/src/modes/ctr/ctr_start.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 /** Initialize a CTR context @@ -55,16 +55,37 @@ int ctr_start( int cipher, ctr->blocklen = cipher_descriptor[cipher].block_length; ctr->cipher = cipher; ctr->padlen = 0; - ctr->mode = ctr_mode; + ctr->mode = ctr_mode & 1; for (x = 0; x < ctr->blocklen; x++) { ctr->ctr[x] = IV[x]; } - cipher_descriptor[ctr->cipher].ecb_encrypt(ctr->ctr, ctr->pad, &ctr->key); - return CRYPT_OK; + + if (ctr_mode & LTC_CTR_RFC3686) { + /* increment the IV as per RFC 3686 */ + if (ctr->mode == CTR_COUNTER_LITTLE_ENDIAN) { + /* little-endian */ + for (x = 0; x < ctr->blocklen; x++) { + ctr->ctr[x] = (ctr->ctr[x] + (unsigned char)1) & (unsigned char)255; + if (ctr->ctr[x] != (unsigned char)0) { + break; + } + } + } else { + /* big-endian */ + for (x = ctr->blocklen-1; x >= 0; x--) { + ctr->ctr[x] = (ctr->ctr[x] + (unsigned char)1) & (unsigned char)255; + if (ctr->ctr[x] != (unsigned char)0) { + break; + } + } + } + } + + return cipher_descriptor[ctr->cipher].ecb_encrypt(ctr->ctr, ctr->pad, &ctr->key); } #endif /* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_start.c,v $ */ -/* $Revision: 1.6 $ */ -/* $Date: 2005/05/05 14:35:59 $ */ +/* $Revision: 1.11 $ */ +/* $Date: 2006/11/05 01:46:35 $ */ diff --git a/libtomcrypt/src/modes/ctr/ctr_test.c b/libtomcrypt/src/modes/ctr/ctr_test.c new file mode 100644 index 0000000..ad20778 --- /dev/null +++ b/libtomcrypt/src/modes/ctr/ctr_test.c @@ -0,0 +1,85 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + * + * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com + */ +#include "tomcrypt.h" + +/** + @file ctr_test.c + CTR implementation, Tests again RFC 3686, Tom St Denis +*/ + +#ifdef LTC_CTR_MODE + +int ctr_test(void) +{ +#ifdef LTC_NO_TEST + return CRYPT_NOP; +#else + static const struct { + int keylen, msglen; + unsigned char key[32], IV[16], pt[64], ct[64]; + } tests[] = { +/* 128-bit key, 16-byte pt */ +{ + 16, 16, + {0xAE,0x68,0x52,0xF8,0x12,0x10,0x67,0xCC,0x4B,0xF7,0xA5,0x76,0x55,0x77,0xF3,0x9E }, + {0x00,0x00,0x00,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, + {0x53,0x69,0x6E,0x67,0x6C,0x65,0x20,0x62,0x6C,0x6F,0x63,0x6B,0x20,0x6D,0x73,0x67 }, + {0xE4,0x09,0x5D,0x4F,0xB7,0xA7,0xB3,0x79,0x2D,0x61,0x75,0xA3,0x26,0x13,0x11,0xB8 }, +}, + +/* 128-bit key, 36-byte pt */ +{ + 16, 36, + {0x76,0x91,0xBE,0x03,0x5E,0x50,0x20,0xA8,0xAC,0x6E,0x61,0x85,0x29,0xF9,0xA0,0xDC }, + {0x00,0xE0,0x01,0x7B,0x27,0x77,0x7F,0x3F,0x4A,0x17,0x86,0xF0,0x00,0x00,0x00,0x00 }, + {0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F, + 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F, + 0x20,0x21,0x22,0x23}, + {0xC1,0xCF,0x48,0xA8,0x9F,0x2F,0xFD,0xD9,0xCF,0x46,0x52,0xE9,0xEF,0xDB,0x72,0xD7, + 0x45,0x40,0xA4,0x2B,0xDE,0x6D,0x78,0x36,0xD5,0x9A,0x5C,0xEA,0xAE,0xF3,0x10,0x53, + 0x25,0xB2,0x07,0x2F }, +}, +}; + int idx, err, x; + unsigned char buf[64]; + symmetric_CTR ctr; + + /* AES can be under rijndael or aes... try to find it */ + if ((idx = find_cipher("aes")) == -1) { + if ((idx = find_cipher("rijndael")) == -1) { + return CRYPT_NOP; + } + } + + for (x = 0; x < (int)(sizeof(tests)/sizeof(tests[0])); x++) { + if ((err = ctr_start(idx, tests[x].IV, tests[x].key, tests[x].keylen, 0, CTR_COUNTER_BIG_ENDIAN|LTC_CTR_RFC3686, &ctr)) != CRYPT_OK) { + return err; + } + if ((err = ctr_encrypt(tests[x].pt, buf, tests[x].msglen, &ctr)) != CRYPT_OK) { + return err; + } + ctr_done(&ctr); + if (XMEMCMP(buf, tests[x].ct, tests[x].msglen)) { + return CRYPT_FAIL_TESTVECTOR; + } + } + return CRYPT_OK; +#endif +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_test.c,v $ */ +/* $Revision: 1.3 $ */ +/* $Date: 2006/11/05 02:06:49 $ */ + + + |