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to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)

--HG--
extra : convert_revision : dc4809882e1b9f2dcd3f8bbe38c74a0a52c39ce4
This commit is contained in:
Matt Johnston
2006-03-08 13:23:58 +00:00
parent 33defd1f9b 8608a8e64c
commit 6ae3a09ef3
623 changed files with 88913 additions and 259 deletions
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124
libtomcrypt/src/encauth/gcm/gcm_add_aad.c Normal file
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/* 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.org
*/
/**
@file gcm_add_aad.c
GCM implementation, Add AAD data to the stream, by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef GCM_MODE
/**
Add AAD to the GCM state
@param gcm The GCM state
@param adata The additional authentication data to add to the GCM state
@param adatalen The length of the AAD data.
@return CRYPT_OK on success
*/
int gcm_add_aad(gcm_state *gcm,
const unsigned char *adata, unsigned long adatalen)
{
unsigned long x;
int err;
#ifdef LTC_FAST
unsigned long y;
#endif
LTC_ARGCHK(gcm != NULL);
if (adatalen > 0) {
LTC_ARGCHK(adata != NULL);
}
if (gcm->buflen > 16 || gcm->buflen < 0) {
return CRYPT_INVALID_ARG;
}
if ((err = cipher_is_valid(gcm->cipher)) != CRYPT_OK) {
return err;
}
/* in IV mode? */
if (gcm->mode == GCM_MODE_IV) {
/* let's process the IV */
if (gcm->ivmode || gcm->buflen != 12) {
for (x = 0; x < (unsigned long)gcm->buflen; x++) {
gcm->X[x] ^= gcm->buf[x];
}
if (gcm->buflen) {
gcm->totlen += gcm->buflen * CONST64(8);
gcm_mult_h(gcm, gcm->X);
}
/* mix in the length */
zeromem(gcm->buf, 8);
STORE64H(gcm->totlen, gcm->buf+8);
for (x = 0; x < 16; x++) {
gcm->X[x] ^= gcm->buf[x];
}
gcm_mult_h(gcm, gcm->X);
/* copy counter out */
XMEMCPY(gcm->Y, gcm->X, 16);
zeromem(gcm->X, 16);
} else {
XMEMCPY(gcm->Y, gcm->buf, 12);
gcm->Y[12] = 0;
gcm->Y[13] = 0;
gcm->Y[14] = 0;
gcm->Y[15] = 1;
}
XMEMCPY(gcm->Y_0, gcm->Y, 16);
zeromem(gcm->buf, 16);
gcm->buflen = 0;
gcm->totlen = 0;
gcm->mode = GCM_MODE_AAD;
}
if (gcm->mode != GCM_MODE_AAD || gcm->buflen >= 16) {
return CRYPT_INVALID_ARG;
}
x = 0;
#ifdef LTC_FAST
if (gcm->buflen == 0) {
for (x = 0; x < (adatalen & ~15); x += 16) {
for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) {
*((LTC_FAST_TYPE*)(&gcm->X[y])) ^= *((LTC_FAST_TYPE*)(&adata[x + y]));
}
gcm_mult_h(gcm, gcm->X);
gcm->totlen += 128;
}
adata += x;
}
#endif
/* start adding AAD data to the state */
for (; x < adatalen; x++) {
gcm->X[gcm->buflen++] ^= *adata++;
if (gcm->buflen == 16) {
/* GF mult it */
gcm_mult_h(gcm, gcm->X);
gcm->buflen = 0;
gcm->totlen += 128;
}
}
return CRYPT_OK;
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_add_aad.c,v $ */
/* $Revision: 1.14 $ */
/* $Date: 2005/05/05 14:35:58 $ */

94
libtomcrypt/src/encauth/gcm/gcm_add_iv.c Normal file
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/* 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.org
*/
/**
@file gcm_add_iv.c
GCM implementation, add IV data to the state, by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef GCM_MODE
/**
Add IV data to the GCM state
@param gcm The GCM state
@param IV The initial value data to add
@param IVlen The length of the IV
@return CRYPT_OK on success
*/
int gcm_add_iv(gcm_state *gcm,
const unsigned char *IV, unsigned long IVlen)
{
unsigned long x, y;
int err;
LTC_ARGCHK(gcm != NULL);
if (IVlen > 0) {
LTC_ARGCHK(IV != NULL);
}
/* must be in IV mode */
if (gcm->mode != GCM_MODE_IV) {
return CRYPT_INVALID_ARG;
}
if (gcm->buflen >= 16 || gcm->buflen < 0) {
return CRYPT_INVALID_ARG;
}
if ((err = cipher_is_valid(gcm->cipher)) != CRYPT_OK) {
return err;
}
/* trip the ivmode flag */
if (IVlen + gcm->buflen > 12) {
gcm->ivmode |= 1;
}
x = 0;
#ifdef LTC_FAST
if (gcm->buflen == 0) {
for (x = 0; x < (IVlen & ~15); x += 16) {
for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) {
*((LTC_FAST_TYPE*)(&gcm->X[y])) ^= *((LTC_FAST_TYPE*)(&IV[x + y]));
}
gcm_mult_h(gcm, gcm->X);
gcm->totlen += 128;
}
IV += x;
}
#endif
/* start adding IV data to the state */
for (; x < IVlen; x++) {
gcm->buf[gcm->buflen++] = *IV++;
if (gcm->buflen == 16) {
/* GF mult it */
for (y = 0; y < 16; y++) {
gcm->X[y] ^= gcm->buf[y];
}
gcm_mult_h(gcm, gcm->X);
gcm->buflen = 0;
gcm->totlen += 128;
}
}
return CRYPT_OK;
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_add_iv.c,v $ */
/* $Revision: 1.6 $ */
/* $Date: 2005/05/05 14:35:58 $ */

81
libtomcrypt/src/encauth/gcm/gcm_done.c Normal file
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/* 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.org
*/
/**
@file gcm_done.c
GCM implementation, Terminate the stream, by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef GCM_MODE
/**
Terminate a GCM stream
@param gcm The GCM state
@param tag [out] The destination for the MAC tag
@param taglen [in/out] The length of the MAC tag
@return CRYPT_OK on success
*/
int gcm_done(gcm_state *gcm,
unsigned char *tag, unsigned long *taglen)
{
unsigned long x;
int err;
LTC_ARGCHK(gcm != NULL);
LTC_ARGCHK(tag != NULL);
LTC_ARGCHK(taglen != NULL);
if (gcm->buflen > 16 || gcm->buflen < 0) {
return CRYPT_INVALID_ARG;
}
if ((err = cipher_is_valid(gcm->cipher)) != CRYPT_OK) {
return err;
}
if (gcm->mode != GCM_MODE_TEXT) {
return CRYPT_INVALID_ARG;
}
/* handle remaining ciphertext */
if (gcm->buflen) {
gcm->pttotlen += gcm->buflen * CONST64(8);
gcm_mult_h(gcm, gcm->X);
}
/* length */
STORE64H(gcm->totlen, gcm->buf);
STORE64H(gcm->pttotlen, gcm->buf+8);
for (x = 0; x < 16; x++) {
gcm->X[x] ^= gcm->buf[x];
}
gcm_mult_h(gcm, gcm->X);
/* encrypt original counter */
cipher_descriptor[gcm->cipher].ecb_encrypt(gcm->Y_0, gcm->buf, &gcm->K);
for (x = 0; x < 16 && x < *taglen; x++) {
tag[x] = gcm->buf[x] ^ gcm->X[x];
}
*taglen = x;
cipher_descriptor[gcm->cipher].done(&gcm->K);
return CRYPT_OK;
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_done.c,v $ */
/* $Revision: 1.7 $ */
/* $Date: 2005/05/05 14:35:58 $ */

94
libtomcrypt/src/encauth/gcm/gcm_gf_mult.c Normal file
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/* 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.org
*/
/**
@file gcm_gf_mult.c
GCM implementation, initialize state, by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef GCM_MODE
/* right shift */
static void gcm_rightshift(unsigned char *a)
{
int x;
for (x = 15; x > 0; x--) {
a[x] = (a[x]>>1) | ((a[x-1]<<7)&0x80);
}
a[0] >>= 1;
}
/* c = b*a */
static const unsigned char mask[] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
static const unsigned char poly[] = { 0x00, 0xE1 };
/**
GCM GF multiplier (internal use only)
@param a First value
@param b Second value
@param c Destination for a * b
*/
void gcm_gf_mult(const unsigned char *a, const unsigned char *b, unsigned char *c)
{
unsigned char Z[16], V[16];
unsigned x, y, z;
zeromem(Z, 16);
XMEMCPY(V, a, 16);
for (x = 0; x < 128; x++) {
if (b[x>>3] & mask[x&7]) {
for (y = 0; y < 16; y++) {
Z[y] ^= V[y];
}
}
z = V[15] & 0x01;
gcm_rightshift(V);
V[0] ^= poly[z];
}
XMEMCPY(c, Z, 16);
}
/**
GCM multiply by H
@param gcm The GCM state which holds the H value
@param I The value to multiply H by
*/
void gcm_mult_h(gcm_state *gcm, unsigned char *I)
{
unsigned char T[16];
#ifdef GCM_TABLES
int x, y;
XMEMCPY(T, &gcm->PC[0][I[0]][0], 16);
for (x = 1; x < 16; x++) {
#ifdef LTC_FAST
for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) {
*((LTC_FAST_TYPE *)(T + y)) ^= *((LTC_FAST_TYPE *)(&gcm->PC[x][I[x]][y]));
}
#else
for (y = 0; y < 16; y++) {
T[y] ^= gcm->PC[x][I[x]][y];
}
#endif
}
#else
gcm_gf_mult(gcm->H, I, T);
#endif
XMEMCPY(I, T, 16);
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_gf_mult.c,v $ */
/* $Revision: 1.16 $ */
/* $Date: 2005/05/21 14:33:42 $ */

145
libtomcrypt/src/encauth/gcm/gcm_init.c Normal file
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/* 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.org
*/
/**
@file gcm_init.c
GCM implementation, initialize state, by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef GCM_MODE
#ifdef GCM_TABLES
/* this is x*2^128 mod p(x) ... the results are 16 bytes each stored in a packed format. Since only the
* lower 16 bits are not zero'ed I removed the upper 14 bytes */
static const unsigned char gcm_shift_table[256*2] = {
0x00, 0x00, 0x01, 0xc2, 0x03, 0x84, 0x02, 0x46, 0x07, 0x08, 0x06, 0xca, 0x04, 0x8c, 0x05, 0x4e,
0x0e, 0x10, 0x0f, 0xd2, 0x0d, 0x94, 0x0c, 0x56, 0x09, 0x18, 0x08, 0xda, 0x0a, 0x9c, 0x0b, 0x5e,
0x1c, 0x20, 0x1d, 0xe2, 0x1f, 0xa4, 0x1e, 0x66, 0x1b, 0x28, 0x1a, 0xea, 0x18, 0xac, 0x19, 0x6e,
0x12, 0x30, 0x13, 0xf2, 0x11, 0xb4, 0x10, 0x76, 0x15, 0x38, 0x14, 0xfa, 0x16, 0xbc, 0x17, 0x7e,
0x38, 0x40, 0x39, 0x82, 0x3b, 0xc4, 0x3a, 0x06, 0x3f, 0x48, 0x3e, 0x8a, 0x3c, 0xcc, 0x3d, 0x0e,
0x36, 0x50, 0x37, 0x92, 0x35, 0xd4, 0x34, 0x16, 0x31, 0x58, 0x30, 0x9a, 0x32, 0xdc, 0x33, 0x1e,
0x24, 0x60, 0x25, 0xa2, 0x27, 0xe4, 0x26, 0x26, 0x23, 0x68, 0x22, 0xaa, 0x20, 0xec, 0x21, 0x2e,
0x2a, 0x70, 0x2b, 0xb2, 0x29, 0xf4, 0x28, 0x36, 0x2d, 0x78, 0x2c, 0xba, 0x2e, 0xfc, 0x2f, 0x3e,
0x70, 0x80, 0x71, 0x42, 0x73, 0x04, 0x72, 0xc6, 0x77, 0x88, 0x76, 0x4a, 0x74, 0x0c, 0x75, 0xce,
0x7e, 0x90, 0x7f, 0x52, 0x7d, 0x14, 0x7c, 0xd6, 0x79, 0x98, 0x78, 0x5a, 0x7a, 0x1c, 0x7b, 0xde,
0x6c, 0xa0, 0x6d, 0x62, 0x6f, 0x24, 0x6e, 0xe6, 0x6b, 0xa8, 0x6a, 0x6a, 0x68, 0x2c, 0x69, 0xee,
0x62, 0xb0, 0x63, 0x72, 0x61, 0x34, 0x60, 0xf6, 0x65, 0xb8, 0x64, 0x7a, 0x66, 0x3c, 0x67, 0xfe,
0x48, 0xc0, 0x49, 0x02, 0x4b, 0x44, 0x4a, 0x86, 0x4f, 0xc8, 0x4e, 0x0a, 0x4c, 0x4c, 0x4d, 0x8e,
0x46, 0xd0, 0x47, 0x12, 0x45, 0x54, 0x44, 0x96, 0x41, 0xd8, 0x40, 0x1a, 0x42, 0x5c, 0x43, 0x9e,
0x54, 0xe0, 0x55, 0x22, 0x57, 0x64, 0x56, 0xa6, 0x53, 0xe8, 0x52, 0x2a, 0x50, 0x6c, 0x51, 0xae,
0x5a, 0xf0, 0x5b, 0x32, 0x59, 0x74, 0x58, 0xb6, 0x5d, 0xf8, 0x5c, 0x3a, 0x5e, 0x7c, 0x5f, 0xbe,
0xe1, 0x00, 0xe0, 0xc2, 0xe2, 0x84, 0xe3, 0x46, 0xe6, 0x08, 0xe7, 0xca, 0xe5, 0x8c, 0xe4, 0x4e,
0xef, 0x10, 0xee, 0xd2, 0xec, 0x94, 0xed, 0x56, 0xe8, 0x18, 0xe9, 0xda, 0xeb, 0x9c, 0xea, 0x5e,
0xfd, 0x20, 0xfc, 0xe2, 0xfe, 0xa4, 0xff, 0x66, 0xfa, 0x28, 0xfb, 0xea, 0xf9, 0xac, 0xf8, 0x6e,
0xf3, 0x30, 0xf2, 0xf2, 0xf0, 0xb4, 0xf1, 0x76, 0xf4, 0x38, 0xf5, 0xfa, 0xf7, 0xbc, 0xf6, 0x7e,
0xd9, 0x40, 0xd8, 0x82, 0xda, 0xc4, 0xdb, 0x06, 0xde, 0x48, 0xdf, 0x8a, 0xdd, 0xcc, 0xdc, 0x0e,
0xd7, 0x50, 0xd6, 0x92, 0xd4, 0xd4, 0xd5, 0x16, 0xd0, 0x58, 0xd1, 0x9a, 0xd3, 0xdc, 0xd2, 0x1e,
0xc5, 0x60, 0xc4, 0xa2, 0xc6, 0xe4, 0xc7, 0x26, 0xc2, 0x68, 0xc3, 0xaa, 0xc1, 0xec, 0xc0, 0x2e,
0xcb, 0x70, 0xca, 0xb2, 0xc8, 0xf4, 0xc9, 0x36, 0xcc, 0x78, 0xcd, 0xba, 0xcf, 0xfc, 0xce, 0x3e,
0x91, 0x80, 0x90, 0x42, 0x92, 0x04, 0x93, 0xc6, 0x96, 0x88, 0x97, 0x4a, 0x95, 0x0c, 0x94, 0xce,
0x9f, 0x90, 0x9e, 0x52, 0x9c, 0x14, 0x9d, 0xd6, 0x98, 0x98, 0x99, 0x5a, 0x9b, 0x1c, 0x9a, 0xde,
0x8d, 0xa0, 0x8c, 0x62, 0x8e, 0x24, 0x8f, 0xe6, 0x8a, 0xa8, 0x8b, 0x6a, 0x89, 0x2c, 0x88, 0xee,
0x83, 0xb0, 0x82, 0x72, 0x80, 0x34, 0x81, 0xf6, 0x84, 0xb8, 0x85, 0x7a, 0x87, 0x3c, 0x86, 0xfe,
0xa9, 0xc0, 0xa8, 0x02, 0xaa, 0x44, 0xab, 0x86, 0xae, 0xc8, 0xaf, 0x0a, 0xad, 0x4c, 0xac, 0x8e,
0xa7, 0xd0, 0xa6, 0x12, 0xa4, 0x54, 0xa5, 0x96, 0xa0, 0xd8, 0xa1, 0x1a, 0xa3, 0x5c, 0xa2, 0x9e,
0xb5, 0xe0, 0xb4, 0x22, 0xb6, 0x64, 0xb7, 0xa6, 0xb2, 0xe8, 0xb3, 0x2a, 0xb1, 0x6c, 0xb0, 0xae,
0xbb, 0xf0, 0xba, 0x32, 0xb8, 0x74, 0xb9, 0xb6, 0xbc, 0xf8, 0xbd, 0x3a, 0xbf, 0x7c, 0xbe, 0xbe };
#endif
/**
Initialize a GCM state
@param gcm The GCM state to initialize
@param cipher The index of the cipher to use
@param key The secret key
@param keylen The length of the secret key
@return CRYPT_OK on success
*/
int gcm_init(gcm_state *gcm, int cipher,
const unsigned char *key, int keylen)
{
int err;
unsigned char B[16];
#ifdef GCM_TABLES
int x, y, z, t;
#endif
LTC_ARGCHK(gcm != NULL);
LTC_ARGCHK(key != NULL);
#ifdef LTC_FAST
if (16 % sizeof(LTC_FAST_TYPE)) {
return CRYPT_INVALID_ARG;
}
#endif
/* is cipher valid? */
if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
return err;
}
if (cipher_descriptor[cipher].block_length != 16) {
return CRYPT_INVALID_CIPHER;
}
/* schedule key */
if ((err = cipher_descriptor[cipher].setup(key, keylen, 0, &gcm->K)) != CRYPT_OK) {
return err;
}
/* H = E(0) */
zeromem(B, 16);
cipher_descriptor[cipher].ecb_encrypt(B, gcm->H, &gcm->K);
/* setup state */
zeromem(gcm->buf, sizeof(gcm->buf));
zeromem(gcm->X, sizeof(gcm->X));
gcm->cipher = cipher;
gcm->mode = GCM_MODE_IV;
gcm->ivmode = 0;
gcm->buflen = 0;
gcm->totlen = 0;
gcm->pttotlen = 0;
#ifdef GCM_TABLES
/* setup tables */
/* generate the first table as it has no shifting (from which we make the other tables) */
zeromem(B, 16);
for (y = 0; y < 256; y++) {
B[0] = y;
gcm_gf_mult(gcm->H, B, &gcm->PC[0][y][0]);
}
/* now generate the rest of the tables based the previous table */
for (x = 1; x < 16; x++) {
for (y = 0; y < 256; y++) {
/* now shift it right by 8 bits */
t = gcm->PC[x-1][y][15];
for (z = 15; z > 0; z--) {
gcm->PC[x][y][z] = gcm->PC[x-1][y][z-1];
}
gcm->PC[x][y][0] = gcm_shift_table[t<<1];
gcm->PC[x][y][1] ^= gcm_shift_table[(t<<1)+1];
}
}
#endif
return CRYPT_OK;
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_init.c,v $ */
/* $Revision: 1.15 $ */
/* $Date: 2005/05/21 15:05:19 $ */

93
libtomcrypt/src/encauth/gcm/gcm_memory.c Normal file
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@@ -0,0 +1,93 @@
/* 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.org
*/
/**
@file gcm_memory.c
GCM implementation, process a packet, by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef GCM_MODE
/**
Process an entire GCM packet in one call.
@param cipher Index of cipher to use
@param key The secret key
@param keylen The length of the secret key
@param IV The initial vector
@param IVlen The length of the initial vector
@param adata The additional authentication data (header)
@param adatalen The length of the adata
@param pt The plaintext
@param ptlen The length of the plaintext (ciphertext length is the same)
@param ct The ciphertext
@param tag [out] The MAC tag
@param taglen [in/out] The MAC tag length
@param direction Encrypt or Decrypt mode (GCM_ENCRYPT or GCM_DECRYPT)
@return CRYPT_OK on success
*/
int gcm_memory( int cipher,
const unsigned char *key, unsigned long keylen,
const unsigned char *IV, unsigned long IVlen,
const unsigned char *adata, unsigned long adatalen,
unsigned char *pt, unsigned long ptlen,
unsigned char *ct,
unsigned char *tag, unsigned long *taglen,
int direction)
{
gcm_state *gcm;
int err;
if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
return err;
}
if (cipher_descriptor[cipher].accel_gcm_memory != NULL) {
cipher_descriptor[cipher].accel_gcm_memory
(key, keylen,
IV, IVlen,
adata, adatalen,
pt, ptlen,
ct,
tag, taglen,
direction);
return CRYPT_OK;
}
gcm = XMALLOC(sizeof(*gcm));
if (gcm == NULL) {
return CRYPT_MEM;
}
if ((err = gcm_init(gcm, cipher, key, keylen)) != CRYPT_OK) {
goto LTC_ERR;
}
if ((err = gcm_add_iv(gcm, IV, IVlen)) != CRYPT_OK) {
goto LTC_ERR;
}
if ((err = gcm_add_aad(gcm, adata, adatalen)) != CRYPT_OK) {
goto LTC_ERR;
}
if ((err = gcm_process(gcm, pt, ptlen, ct, direction)) != CRYPT_OK) {
goto LTC_ERR;
}
err = gcm_done(gcm, tag, taglen);
LTC_ERR:
XFREE(gcm);
return err;
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_memory.c,v $ */
/* $Revision: 1.19 $ */
/* $Date: 2005/05/05 14:35:58 $ */

147
libtomcrypt/src/encauth/gcm/gcm_process.c Normal file
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@@ -0,0 +1,147 @@
/* 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.org
*/
/**
@file gcm_process.c
GCM implementation, process message data, by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef GCM_MODE
/**
Process plaintext/ciphertext through GCM
@param gcm The GCM state
@param pt The plaintext
@param ptlen The plaintext length (ciphertext length is the same)
@param ct The ciphertext
@param direction Encrypt or Decrypt mode (GCM_ENCRYPT or GCM_DECRYPT)
@return CRYPT_OK on success
*/
int gcm_process(gcm_state *gcm,
unsigned char *pt, unsigned long ptlen,
unsigned char *ct,
int direction)
{
unsigned long x, y;
unsigned char b;
int err;
LTC_ARGCHK(gcm != NULL);
if (ptlen > 0) {
LTC_ARGCHK(pt != NULL);
LTC_ARGCHK(ct != NULL);
}
if (gcm->buflen > 16 || gcm->buflen < 0) {
return CRYPT_INVALID_ARG;
}
if ((err = cipher_is_valid(gcm->cipher)) != CRYPT_OK) {
return err;
}
/* in AAD mode? */
if (gcm->mode == GCM_MODE_AAD) {
/* let's process the AAD */
if (gcm->buflen) {
gcm->totlen += gcm->buflen * CONST64(8);
gcm_mult_h(gcm, gcm->X);
}
/* increment counter */
for (y = 15; y >= 12; y--) {
if (++gcm->Y[y]) { break; }
}
/* encrypt the counter */
cipher_descriptor[gcm->cipher].ecb_encrypt(gcm->Y, gcm->buf, &gcm->K);
gcm->buflen = 0;
gcm->mode = GCM_MODE_TEXT;
}
if (gcm->mode != GCM_MODE_TEXT) {
return CRYPT_INVALID_ARG;
}
x = 0;
#ifdef LTC_FAST
if (gcm->buflen == 0) {
if (direction == GCM_ENCRYPT) {
for (x = 0; x < (ptlen & ~15); x += 16) {
/* ctr encrypt */
for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) {
*((LTC_FAST_TYPE*)(&ct[x + y])) = *((LTC_FAST_TYPE*)(&pt[x+y])) ^ *((LTC_FAST_TYPE*)(&gcm->buf[y]));
*((LTC_FAST_TYPE*)(&gcm->X[y])) ^= *((LTC_FAST_TYPE*)(&ct[x+y]));
}
/* GMAC it */
gcm->pttotlen += 128;
gcm_mult_h(gcm, gcm->X);
/* increment counter */
for (y = 15; y >= 12; y--) {
if (++gcm->Y[y]) { break; }
}
cipher_descriptor[gcm->cipher].ecb_encrypt(gcm->Y, gcm->buf, &gcm->K);
}
} else {
for (x = 0; x < (ptlen & ~15); x += 16) {
/* ctr encrypt */
for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) {
*((LTC_FAST_TYPE*)(&gcm->X[y])) ^= *((LTC_FAST_TYPE*)(&ct[x+y]));
*((LTC_FAST_TYPE*)(&pt[x + y])) = *((LTC_FAST_TYPE*)(&ct[x+y])) ^ *((LTC_FAST_TYPE*)(&gcm->buf[y]));
}
/* GMAC it */
gcm->pttotlen += 128;
gcm_mult_h(gcm, gcm->X);
/* increment counter */
for (y = 15; y >= 12; y--) {
if (++gcm->Y[y]) { break; }
}
cipher_descriptor[gcm->cipher].ecb_encrypt(gcm->Y, gcm->buf, &gcm->K);
}
}
}
#endif
/* process text */
for (; x < ptlen; x++) {
if (gcm->buflen == 16) {
gcm->pttotlen += 128;
gcm_mult_h(gcm, gcm->X);
/* increment counter */
for (y = 15; y >= 12; y--) {
if (++gcm->Y[y]) { break; }
}
cipher_descriptor[gcm->cipher].ecb_encrypt(gcm->Y, gcm->buf, &gcm->K);
gcm->buflen = 0;
}
if (direction == GCM_ENCRYPT) {
b = ct[x] = pt[x] ^ gcm->buf[gcm->buflen];
} else {
b = ct[x];
pt[x] = ct[x] ^ gcm->buf[gcm->buflen];
}
gcm->X[gcm->buflen++] ^= b;
}
return CRYPT_OK;
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_process.c,v $ */
/* $Revision: 1.8 $ */
/* $Date: 2005/05/05 14:35:58 $ */

44
libtomcrypt/src/encauth/gcm/gcm_reset.c Normal file
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@@ -0,0 +1,44 @@
/* 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.org
*/
/**
@file gcm_reset.c
GCM implementation, reset a used state so it can accept IV data, by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef GCM_MODE
/**
Reset a GCM state to as if you just called gcm_init(). This saves the initialization time.
@param gcm The GCM state to reset
@return CRYPT_OK on success
*/
int gcm_reset(gcm_state *gcm)
{
LTC_ARGCHK(gcm != NULL);
zeromem(gcm->buf, sizeof(gcm->buf));
zeromem(gcm->X, sizeof(gcm->X));
gcm->mode = GCM_MODE_IV;
gcm->ivmode = 0;
gcm->buflen = 0;
gcm->totlen = 0;
gcm->pttotlen = 0;
return CRYPT_OK;
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_reset.c,v $ */
/* $Revision: 1.3 $ */
/* $Date: 2005/05/05 14:35:58 $ */

368
libtomcrypt/src/encauth/gcm/gcm_test.c Normal file
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@@ -0,0 +1,368 @@
/* 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.org
*/
/**
@file gcm_test.c
GCM implementation, testing, by Tom St Denis
*/
#include "tomcrypt.h"
#ifdef GCM_MODE
/**
Test the GCM code
@return CRYPT_OK on success
*/
int gcm_test(void)
{
#ifndef LTC_TEST
return CRYPT_NOP;
#else
static const struct {
unsigned char K[32];
int keylen;
unsigned char P[64];
unsigned long ptlen;
unsigned char A[64];
unsigned long alen;
unsigned char IV[64];
unsigned long IVlen;
unsigned char C[64];
unsigned char T[16];
} tests[] = {
/* test case #1 */
{
/* key */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
16,
/* plaintext */
{ 0 },
0,
/* AAD data */
{ 0 },
0,
/* IV */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00 },
12,
/* ciphertext */
{ 0 },
/* tag */
{ 0x58, 0xe2, 0xfc, 0xce, 0xfa, 0x7e, 0x30, 0x61,
0x36, 0x7f, 0x1d, 0x57, 0xa4, 0xe7, 0x45, 0x5a }
},
/* test case #2 */
{
/* key */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
16,
/* PT */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
16,
/* ADATA */
{ 0 },
0,
/* IV */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00 },
12,
/* CT */
{ 0x03, 0x88, 0xda, 0xce, 0x60, 0xb6, 0xa3, 0x92,
0xf3, 0x28, 0xc2, 0xb9, 0x71, 0xb2, 0xfe, 0x78 },
/* TAG */
{ 0xab, 0x6e, 0x47, 0xd4, 0x2c, 0xec, 0x13, 0xbd,
0xf5, 0x3a, 0x67, 0xb2, 0x12, 0x57, 0xbd, 0xdf }
},
/* test case #3 */
{
/* key */
{ 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08, },
16,
/* PT */
{ 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
0xba, 0x63, 0x7b, 0x39, 0x1a, 0xaf, 0xd2, 0x55, },
64,
/* ADATA */
{ 0 },
0,
/* IV */
{ 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
0xde, 0xca, 0xf8, 0x88, },
12,
/* CT */
{ 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
0x3d, 0x58, 0xe0, 0x91, 0x47, 0x3f, 0x59, 0x85, },
/* TAG */
{ 0x4d, 0x5c, 0x2a, 0xf3, 0x27, 0xcd, 0x64, 0xa6,
0x2c, 0xf3, 0x5a, 0xbd, 0x2b, 0xa6, 0xfa, 0xb4, }
},
/* test case #4 */
{
/* key */
{ 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08, },
16,
/* PT */
{ 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
0xba, 0x63, 0x7b, 0x39, },
60,
/* ADATA */
{ 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
0xab, 0xad, 0xda, 0xd2, },
20,
/* IV */
{ 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
0xde, 0xca, 0xf8, 0x88, },
12,
/* CT */
{ 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
0x3d, 0x58, 0xe0, 0x91, },
/* TAG */
{ 0x5b, 0xc9, 0x4f, 0xbc, 0x32, 0x21, 0xa5, 0xdb,
0x94, 0xfa, 0xe9, 0x5a, 0xe7, 0x12, 0x1a, 0x47, }
},
/* test case #5 */
{
/* key */
{ 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08, },
16,
/* PT */
{ 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
0xba, 0x63, 0x7b, 0x39, },
60,
/* ADATA */
{ 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
0xab, 0xad, 0xda, 0xd2, },
20,
/* IV */
{ 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad, },
8,
/* CT */
{ 0x61, 0x35, 0x3b, 0x4c, 0x28, 0x06, 0x93, 0x4a,
0x77, 0x7f, 0xf5, 0x1f, 0xa2, 0x2a, 0x47, 0x55,
0x69, 0x9b, 0x2a, 0x71, 0x4f, 0xcd, 0xc6, 0xf8,
0x37, 0x66, 0xe5, 0xf9, 0x7b, 0x6c, 0x74, 0x23,
0x73, 0x80, 0x69, 0x00, 0xe4, 0x9f, 0x24, 0xb2,
0x2b, 0x09, 0x75, 0x44, 0xd4, 0x89, 0x6b, 0x42,
0x49, 0x89, 0xb5, 0xe1, 0xeb, 0xac, 0x0f, 0x07,
0xc2, 0x3f, 0x45, 0x98, },
/* TAG */
{ 0x36, 0x12, 0xd2, 0xe7, 0x9e, 0x3b, 0x07, 0x85,
0x56, 0x1b, 0xe1, 0x4a, 0xac, 0xa2, 0xfc, 0xcb, }
},
/* test case #6 */
{
/* key */
{ 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08, },
16,
/* PT */
{ 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
0xba, 0x63, 0x7b, 0x39, },
60,
/* ADATA */
{ 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
0xab, 0xad, 0xda, 0xd2, },
20,
/* IV */
{ 0x93, 0x13, 0x22, 0x5d, 0xf8, 0x84, 0x06, 0xe5,
0x55, 0x90, 0x9c, 0x5a, 0xff, 0x52, 0x69, 0xaa,
0x6a, 0x7a, 0x95, 0x38, 0x53, 0x4f, 0x7d, 0xa1,
0xe4, 0xc3, 0x03, 0xd2, 0xa3, 0x18, 0xa7, 0x28,
0xc3, 0xc0, 0xc9, 0x51, 0x56, 0x80, 0x95, 0x39,
0xfc, 0xf0, 0xe2, 0x42, 0x9a, 0x6b, 0x52, 0x54,
0x16, 0xae, 0xdb, 0xf5, 0xa0, 0xde, 0x6a, 0x57,
0xa6, 0x37, 0xb3, 0x9b, },
60,
/* CT */
{ 0x8c, 0xe2, 0x49, 0x98, 0x62, 0x56, 0x15, 0xb6,
0x03, 0xa0, 0x33, 0xac, 0xa1, 0x3f, 0xb8, 0x94,
0xbe, 0x91, 0x12, 0xa5, 0xc3, 0xa2, 0x11, 0xa8,
0xba, 0x26, 0x2a, 0x3c, 0xca, 0x7e, 0x2c, 0xa7,
0x01, 0xe4, 0xa9, 0xa4, 0xfb, 0xa4, 0x3c, 0x90,
0xcc, 0xdc, 0xb2, 0x81, 0xd4, 0x8c, 0x7c, 0x6f,
0xd6, 0x28, 0x75, 0xd2, 0xac, 0xa4, 0x17, 0x03,
0x4c, 0x34, 0xae, 0xe5, },
/* TAG */
{ 0x61, 0x9c, 0xc5, 0xae, 0xff, 0xfe, 0x0b, 0xfa,
0x46, 0x2a, 0xf4, 0x3c, 0x16, 0x99, 0xd0, 0x50, }
}
/* rest of test cases are the same except AES key size changes... ignored... */
};
int idx, err;
unsigned long x, y;
unsigned char out[2][64], T[2][16];
/* find aes */
idx = find_cipher("aes");
if (idx == -1) {
idx = find_cipher("rijndael");
if (idx == -1) {
return CRYPT_NOP;
}
}
for (x = 0; x < (int)(sizeof(tests)/sizeof(tests[0])); x++) {
y = sizeof(T[0]);
if ((err = gcm_memory(idx, tests[x].K, tests[x].keylen,
tests[x].IV, tests[x].IVlen,
tests[x].A, tests[x].alen,
(unsigned char*)tests[x].P, tests[x].ptlen,
out[0], T[0], &y, GCM_ENCRYPT)) != CRYPT_OK) {
return err;
}
if (memcmp(out[0], tests[x].C, tests[x].ptlen)) {
#if 0
printf("\nCiphertext wrong %lu\n", x);
for (y = 0; y < tests[x].ptlen; y++) {
printf("%02x", out[0][y] & 255);
}
printf("\n");
#endif
return CRYPT_FAIL_TESTVECTOR;
}
if (memcmp(T[0], tests[x].T, 16)) {
#if 0
printf("\nTag on plaintext wrong %lu\n", x);
for (y = 0; y < 16; y++) {
printf("%02x", T[0][y] & 255);
}
printf("\n");
#endif
return CRYPT_FAIL_TESTVECTOR;
}
y = sizeof(T[1]);
if ((err = gcm_memory(idx, tests[x].K, tests[x].keylen,
tests[x].IV, tests[x].IVlen,
tests[x].A, tests[x].alen,
out[1], tests[x].ptlen,
out[0], T[1], &y, GCM_DECRYPT)) != CRYPT_OK) {
return err;
}
if (memcmp(out[1], tests[x].P, tests[x].ptlen)) {
#if 0
printf("\nplaintext wrong %lu\n", x);
for (y = 0; y < tests[x].ptlen; y++) {
printf("%02x", out[0][y] & 255);
}
printf("\n");
#endif
return CRYPT_FAIL_TESTVECTOR;
}
if (memcmp(T[1], tests[x].T, 16)) {
#if 0
printf("\nTag on ciphertext wrong %lu\n", x);
for (y = 0; y < 16; y++) {
printf("%02x", T[1][y] & 255);
}
printf("\n");
#endif
return CRYPT_FAIL_TESTVECTOR;
}
}
return CRYPT_OK;
#endif
}
#endif
/* $Source: /cvs/libtom/libtomcrypt/src/encauth/gcm/gcm_test.c,v $ */
/* $Revision: 1.15 $ */
/* $Date: 2005/05/05 14:35:58 $ */