diff options
Diffstat (limited to 'libtomcrypt/src/mac/omac')
-rw-r--r-- | libtomcrypt/src/mac/omac/omac_done.c | 86 | ||||
-rw-r--r-- | libtomcrypt/src/mac/omac/omac_file.c | 83 | ||||
-rw-r--r-- | libtomcrypt/src/mac/omac/omac_init.c | 101 | ||||
-rw-r--r-- | libtomcrypt/src/mac/omac/omac_memory.c | 85 | ||||
-rw-r--r-- | libtomcrypt/src/mac/omac/omac_memory_multi.c | 90 | ||||
-rw-r--r-- | libtomcrypt/src/mac/omac/omac_process.c | 88 | ||||
-rw-r--r-- | libtomcrypt/src/mac/omac/omac_test.c | 110 |
7 files changed, 643 insertions, 0 deletions
diff --git a/libtomcrypt/src/mac/omac/omac_done.c b/libtomcrypt/src/mac/omac/omac_done.c new file mode 100644 index 0000000..7a0453b --- /dev/null +++ b/libtomcrypt/src/mac/omac/omac_done.c @@ -0,0 +1,86 @@ +/* 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 omac_done.c + OMAC1 support, terminate a stream, Tom St Denis +*/ + +#ifdef LTC_OMAC + +/** + Terminate an OMAC stream + @param omac The OMAC state + @param out [out] Destination for the authentication tag + @param outlen [in/out] The max size and resulting size of the authentication tag + @return CRYPT_OK if successful +*/ +int omac_done(omac_state *omac, unsigned char *out, unsigned long *outlen) +{ + int err, mode; + unsigned x; + + LTC_ARGCHK(omac != NULL); + LTC_ARGCHK(out != NULL); + LTC_ARGCHK(outlen != NULL); + if ((err = cipher_is_valid(omac->cipher_idx)) != CRYPT_OK) { + return err; + } + + if ((omac->buflen > (int)sizeof(omac->block)) || (omac->buflen < 0) || + (omac->blklen > (int)sizeof(omac->block)) || (omac->buflen > omac->blklen)) { + return CRYPT_INVALID_ARG; + } + + /* figure out mode */ + if (omac->buflen != omac->blklen) { + /* add the 0x80 byte */ + omac->block[omac->buflen++] = 0x80; + + /* pad with 0x00 */ + while (omac->buflen < omac->blklen) { + omac->block[omac->buflen++] = 0x00; + } + mode = 1; + } else { + mode = 0; + } + + /* now xor prev + Lu[mode] */ + for (x = 0; x < (unsigned)omac->blklen; x++) { + omac->block[x] ^= omac->prev[x] ^ omac->Lu[mode][x]; + } + + /* encrypt it */ + if ((err = cipher_descriptor[omac->cipher_idx].ecb_encrypt(omac->block, omac->block, &omac->key)) != CRYPT_OK) { + return err; + } + cipher_descriptor[omac->cipher_idx].done(&omac->key); + + /* output it */ + for (x = 0; x < (unsigned)omac->blklen && x < *outlen; x++) { + out[x] = omac->block[x]; + } + *outlen = x; + +#ifdef LTC_CLEAN_STACK + zeromem(omac, sizeof(*omac)); +#endif + return CRYPT_OK; +} + +#endif + + +/* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_done.c,v $ */ +/* $Revision: 1.7 $ */ +/* $Date: 2006/11/03 00:39:49 $ */ diff --git a/libtomcrypt/src/mac/omac/omac_file.c b/libtomcrypt/src/mac/omac/omac_file.c new file mode 100644 index 0000000..7117ae3 --- /dev/null +++ b/libtomcrypt/src/mac/omac/omac_file.c @@ -0,0 +1,83 @@ +/* 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 omac_file.c + OMAC1 support, process a file, Tom St Denis +*/ + +#ifdef LTC_OMAC + +/** + OMAC a file + @param cipher The index of the cipher desired + @param key The secret key + @param keylen The length of the secret key (octets) + @param filename The name of the file you wish to OMAC + @param out [out] Where the authentication tag is to be stored + @param outlen [in/out] The max size and resulting size of the authentication tag + @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled +*/ +int omac_file(int cipher, + const unsigned char *key, unsigned long keylen, + const char *filename, + unsigned char *out, unsigned long *outlen) +{ +#ifdef LTC_NO_FILE + return CRYPT_NOP; +#else + int err, x; + omac_state omac; + FILE *in; + unsigned char buf[512]; + + LTC_ARGCHK(key != NULL); + LTC_ARGCHK(filename != NULL); + LTC_ARGCHK(out != NULL); + LTC_ARGCHK(outlen != NULL); + + in = fopen(filename, "rb"); + if (in == NULL) { + return CRYPT_FILE_NOTFOUND; + } + + if ((err = omac_init(&omac, cipher, key, keylen)) != CRYPT_OK) { + fclose(in); + return err; + } + + do { + x = fread(buf, 1, sizeof(buf), in); + if ((err = omac_process(&omac, buf, x)) != CRYPT_OK) { + fclose(in); + return err; + } + } while (x == sizeof(buf)); + fclose(in); + + if ((err = omac_done(&omac, out, outlen)) != CRYPT_OK) { + return err; + } + +#ifdef LTC_CLEAN_STACK + zeromem(buf, sizeof(buf)); +#endif + + return CRYPT_OK; +#endif +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_file.c,v $ */ +/* $Revision: 1.5 $ */ +/* $Date: 2006/11/03 00:39:49 $ */ diff --git a/libtomcrypt/src/mac/omac/omac_init.c b/libtomcrypt/src/mac/omac/omac_init.c new file mode 100644 index 0000000..cbf26a2 --- /dev/null +++ b/libtomcrypt/src/mac/omac/omac_init.c @@ -0,0 +1,101 @@ +/* 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 omac_init.c + OMAC1 support, initialize state, by Tom St Denis +*/ + + +#ifdef LTC_OMAC + +/** + Initialize an OMAC state + @param omac The OMAC state to initialize + @param cipher The index of the desired cipher + @param key The secret key + @param keylen The length of the secret key (octets) + @return CRYPT_OK if successful +*/ +int omac_init(omac_state *omac, int cipher, const unsigned char *key, unsigned long keylen) +{ + int err, x, y, mask, msb, len; + + LTC_ARGCHK(omac != NULL); + LTC_ARGCHK(key != NULL); + + /* schedule the key */ + if ((err = cipher_is_valid(cipher)) != CRYPT_OK) { + return err; + } + +#ifdef LTC_FAST + if (cipher_descriptor[cipher].block_length % sizeof(LTC_FAST_TYPE)) { + return CRYPT_INVALID_ARG; + } +#endif + + /* now setup the system */ + switch (cipher_descriptor[cipher].block_length) { + case 8: mask = 0x1B; + len = 8; + break; + case 16: mask = 0x87; + len = 16; + break; + default: return CRYPT_INVALID_ARG; + } + + if ((err = cipher_descriptor[cipher].setup(key, keylen, 0, &omac->key)) != CRYPT_OK) { + return err; + } + + /* ok now we need Lu and Lu^2 [calc one from the other] */ + + /* first calc L which is Ek(0) */ + zeromem(omac->Lu[0], cipher_descriptor[cipher].block_length); + if ((err = cipher_descriptor[cipher].ecb_encrypt(omac->Lu[0], omac->Lu[0], &omac->key)) != CRYPT_OK) { + return err; + } + + /* now do the mults, whoopy! */ + for (x = 0; x < 2; x++) { + /* if msb(L * u^(x+1)) = 0 then just shift, otherwise shift and xor constant mask */ + msb = omac->Lu[x][0] >> 7; + + /* shift left */ + for (y = 0; y < (len - 1); y++) { + omac->Lu[x][y] = ((omac->Lu[x][y] << 1) | (omac->Lu[x][y+1] >> 7)) & 255; + } + omac->Lu[x][len - 1] = ((omac->Lu[x][len - 1] << 1) ^ (msb ? mask : 0)) & 255; + + /* copy up as require */ + if (x == 0) { + XMEMCPY(omac->Lu[1], omac->Lu[0], sizeof(omac->Lu[0])); + } + } + + /* setup state */ + omac->cipher_idx = cipher; + omac->buflen = 0; + omac->blklen = len; + zeromem(omac->prev, sizeof(omac->prev)); + zeromem(omac->block, sizeof(omac->block)); + + return CRYPT_OK; +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_init.c,v $ */ +/* $Revision: 1.10 $ */ +/* $Date: 2006/11/03 00:39:49 $ */ diff --git a/libtomcrypt/src/mac/omac/omac_memory.c b/libtomcrypt/src/mac/omac/omac_memory.c new file mode 100644 index 0000000..50b2db0 --- /dev/null +++ b/libtomcrypt/src/mac/omac/omac_memory.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 omac_memory.c + OMAC1 support, process a block of memory, Tom St Denis +*/ + +#ifdef LTC_OMAC + +/** + OMAC a block of memory + @param cipher The index of the desired cipher + @param key The secret key + @param keylen The length of the secret key (octets) + @param in The data to send through OMAC + @param inlen The length of the data to send through OMAC (octets) + @param out [out] The destination of the authentication tag + @param outlen [in/out] The max size and resulting size of the authentication tag (octets) + @return CRYPT_OK if successful +*/ +int omac_memory(int cipher, + const unsigned char *key, unsigned long keylen, + const unsigned char *in, unsigned long inlen, + unsigned char *out, unsigned long *outlen) +{ + int err; + omac_state *omac; + + LTC_ARGCHK(key != NULL); + LTC_ARGCHK(in != NULL); + LTC_ARGCHK(out != NULL); + LTC_ARGCHK(outlen != NULL); + + /* is the cipher valid? */ + if ((err = cipher_is_valid(cipher)) != CRYPT_OK) { + return err; + } + + /* Use accelerator if found */ + if (cipher_descriptor[cipher].omac_memory != NULL) { + return cipher_descriptor[cipher].omac_memory(key, keylen, in, inlen, out, outlen); + } + + /* allocate ram for omac state */ + omac = XMALLOC(sizeof(omac_state)); + if (omac == NULL) { + return CRYPT_MEM; + } + + /* omac process the message */ + if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) { + goto LBL_ERR; + } + if ((err = omac_process(omac, in, inlen)) != CRYPT_OK) { + goto LBL_ERR; + } + if ((err = omac_done(omac, out, outlen)) != CRYPT_OK) { + goto LBL_ERR; + } + + err = CRYPT_OK; +LBL_ERR: +#ifdef LTC_CLEAN_STACK + zeromem(omac, sizeof(omac_state)); +#endif + + XFREE(omac); + return err; +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_memory.c,v $ */ +/* $Revision: 1.6 $ */ +/* $Date: 2006/11/08 23:01:06 $ */ diff --git a/libtomcrypt/src/mac/omac/omac_memory_multi.c b/libtomcrypt/src/mac/omac/omac_memory_multi.c new file mode 100644 index 0000000..4445ca2 --- /dev/null +++ b/libtomcrypt/src/mac/omac/omac_memory_multi.c @@ -0,0 +1,90 @@ +/* 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" +#include <stdarg.h> + +/** + @file omac_memory_multi.c + OMAC1 support, process multiple blocks of memory, Tom St Denis +*/ + +#ifdef LTC_OMAC + +/** + OMAC multiple blocks of memory + @param cipher The index of the desired cipher + @param key The secret key + @param keylen The length of the secret key (octets) + @param out [out] The destination of the authentication tag + @param outlen [in/out] The max size and resulting size of the authentication tag (octets) + @param in The data to send through OMAC + @param inlen The length of the data to send through OMAC (octets) + @param ... tuples of (data,len) pairs to OMAC, terminated with a (NULL,x) (x=don't care) + @return CRYPT_OK if successful +*/ +int omac_memory_multi(int cipher, + const unsigned char *key, unsigned long keylen, + unsigned char *out, unsigned long *outlen, + const unsigned char *in, unsigned long inlen, ...) +{ + int err; + omac_state *omac; + va_list args; + const unsigned char *curptr; + unsigned long curlen; + + LTC_ARGCHK(key != NULL); + LTC_ARGCHK(in != NULL); + LTC_ARGCHK(out != NULL); + LTC_ARGCHK(outlen != NULL); + + /* allocate ram for omac state */ + omac = XMALLOC(sizeof(omac_state)); + if (omac == NULL) { + return CRYPT_MEM; + } + + /* omac process the message */ + if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) { + goto LBL_ERR; + } + va_start(args, inlen); + curptr = in; + curlen = inlen; + for (;;) { + /* process buf */ + if ((err = omac_process(omac, curptr, curlen)) != CRYPT_OK) { + goto LBL_ERR; + } + /* step to next */ + curptr = va_arg(args, const unsigned char*); + if (curptr == NULL) { + break; + } + curlen = va_arg(args, unsigned long); + } + if ((err = omac_done(omac, out, outlen)) != CRYPT_OK) { + goto LBL_ERR; + } +LBL_ERR: +#ifdef LTC_CLEAN_STACK + zeromem(omac, sizeof(omac_state)); +#endif + XFREE(omac); + va_end(args); + return err; +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_memory_multi.c,v $ */ +/* $Revision: 1.5 $ */ +/* $Date: 2006/11/03 00:39:49 $ */ diff --git a/libtomcrypt/src/mac/omac/omac_process.c b/libtomcrypt/src/mac/omac/omac_process.c new file mode 100644 index 0000000..f4b96f5 --- /dev/null +++ b/libtomcrypt/src/mac/omac/omac_process.c @@ -0,0 +1,88 @@ +/* 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 omac_process.c + OMAC1 support, process data, Tom St Denis +*/ + + +#ifdef LTC_OMAC + +/** + Process data through OMAC + @param omac The OMAC state + @param in The input data to send through OMAC + @param inlen The length of the input (octets) + @return CRYPT_OK if successful +*/ +int omac_process(omac_state *omac, const unsigned char *in, unsigned long inlen) +{ + unsigned long n, x; + int err; + + LTC_ARGCHK(omac != NULL); + LTC_ARGCHK(in != NULL); + if ((err = cipher_is_valid(omac->cipher_idx)) != CRYPT_OK) { + return err; + } + + if ((omac->buflen > (int)sizeof(omac->block)) || (omac->buflen < 0) || + (omac->blklen > (int)sizeof(omac->block)) || (omac->buflen > omac->blklen)) { + return CRYPT_INVALID_ARG; + } + +#ifdef LTC_FAST + if (omac->buflen == 0 && inlen > 16) { + int y; + for (x = 0; x < (inlen - 16); x += 16) { + for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) { + *((LTC_FAST_TYPE*)(&omac->prev[y])) ^= *((LTC_FAST_TYPE*)(&in[y])); + } + in += 16; + if ((err = cipher_descriptor[omac->cipher_idx].ecb_encrypt(omac->prev, omac->prev, &omac->key)) != CRYPT_OK) { + return err; + } + } + inlen -= x; + } +#endif + + while (inlen != 0) { + /* ok if the block is full we xor in prev, encrypt and replace prev */ + if (omac->buflen == omac->blklen) { + for (x = 0; x < (unsigned long)omac->blklen; x++) { + omac->block[x] ^= omac->prev[x]; + } + if ((err = cipher_descriptor[omac->cipher_idx].ecb_encrypt(omac->block, omac->prev, &omac->key)) != CRYPT_OK) { + return err; + } + omac->buflen = 0; + } + + /* add bytes */ + n = MIN(inlen, (unsigned long)(omac->blklen - omac->buflen)); + XMEMCPY(omac->block + omac->buflen, in, n); + omac->buflen += n; + inlen -= n; + in += n; + } + + return CRYPT_OK; +} + +#endif + + +/* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_process.c,v $ */ +/* $Revision: 1.9 $ */ +/* $Date: 2006/11/03 00:39:49 $ */ diff --git a/libtomcrypt/src/mac/omac/omac_test.c b/libtomcrypt/src/mac/omac/omac_test.c new file mode 100644 index 0000000..3230a8c --- /dev/null +++ b/libtomcrypt/src/mac/omac/omac_test.c @@ -0,0 +1,110 @@ +/* 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 omac_test.c + OMAC1 support, self-test, by Tom St Denis +*/ + +#ifdef LTC_OMAC + +/** + Test the OMAC setup + @return CRYPT_OK if successful, CRYPT_NOP if tests have been disabled +*/ +int omac_test(void) +{ +#if !defined(LTC_TEST) + return CRYPT_NOP; +#else + static const struct { + int keylen, msglen; + unsigned char key[16], msg[64], tag[16]; + } tests[] = { + { 16, 0, + { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, + 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c }, + { 0x00 }, + { 0xbb, 0x1d, 0x69, 0x29, 0xe9, 0x59, 0x37, 0x28, + 0x7f, 0xa3, 0x7d, 0x12, 0x9b, 0x75, 0x67, 0x46 } + }, + { 16, 16, + { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, + 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c }, + { 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, + 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a }, + { 0x07, 0x0a, 0x16, 0xb4, 0x6b, 0x4d, 0x41, 0x44, + 0xf7, 0x9b, 0xdd, 0x9d, 0xd0, 0x4a, 0x28, 0x7c } + }, + { 16, 40, + { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, + 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c }, + { 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, + 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a, + 0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, + 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51, + 0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11 }, + { 0xdf, 0xa6, 0x67, 0x47, 0xde, 0x9a, 0xe6, 0x30, + 0x30, 0xca, 0x32, 0x61, 0x14, 0x97, 0xc8, 0x27 } + }, + { 16, 64, + { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, + 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c }, + { 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, + 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a, + 0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, + 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51, + 0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, + 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef, + 0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, + 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10 }, + { 0x51, 0xf0, 0xbe, 0xbf, 0x7e, 0x3b, 0x9d, 0x92, + 0xfc, 0x49, 0x74, 0x17, 0x79, 0x36, 0x3c, 0xfe } + } + + }; + unsigned char out[16]; + int x, err, idx; + unsigned long len; + + + /* 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++) { + len = sizeof(out); + if ((err = omac_memory(idx, tests[x].key, tests[x].keylen, tests[x].msg, tests[x].msglen, out, &len)) != CRYPT_OK) { + return err; + } + + if (XMEMCMP(out, tests[x].tag, 16) != 0) { +#if 0 + int y; + printf("\n\nTag: "); + for (y = 0; y < 16; y++) printf("%02x", out[y]); printf("\n\n"); +#endif + return CRYPT_FAIL_TESTVECTOR; + } + } + return CRYPT_OK; +#endif +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_test.c,v $ */ +/* $Revision: 1.6 $ */ +/* $Date: 2006/11/03 00:39:49 $ */ |