X-Git-Url: https://pd.if.org/git/?p=zpackage;a=blobdiff_plain;f=libtomcrypt%2Fsrc%2Fprngs%2Fsober128.c;fp=libtomcrypt%2Fsrc%2Fprngs%2Fsober128.c;h=0000000000000000000000000000000000000000;hp=275920c0f28f00b0c773a100c70fdd47726ccaea;hb=094fa8c1bc2e27a560833c6a829b1d9b60de7034;hpb=27410df6ded2d78850397c159cbccff1a78012f2 diff --git a/libtomcrypt/src/prngs/sober128.c b/libtomcrypt/src/prngs/sober128.c deleted file mode 100644 index 275920c..0000000 --- a/libtomcrypt/src/prngs/sober128.c +++ /dev/null @@ -1,249 +0,0 @@ -/* 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. - */ - -#include "tomcrypt.h" - -/** - @file prngs/sober128.c - Implementation of SOBER-128 by Tom St Denis. - Based on s128fast.c reference code supplied by Greg Rose of QUALCOMM. -*/ - -#ifdef LTC_SOBER128 - -const struct ltc_prng_descriptor sober128_desc = -{ - "sober128", - 40, - &sober128_start, - &sober128_add_entropy, - &sober128_ready, - &sober128_read, - &sober128_done, - &sober128_export, - &sober128_import, - &sober128_test -}; - -/** - Start the PRNG - @param prng [out] The PRNG state to initialize - @return CRYPT_OK if successful -*/ -int sober128_start(prng_state *prng) -{ - LTC_ARGCHK(prng != NULL); - prng->ready = 0; - XMEMSET(&prng->sober128.ent, 0, sizeof(prng->sober128.ent)); - prng->sober128.idx = 0; - LTC_MUTEX_INIT(&prng->lock) - return CRYPT_OK; -} - -/** - Add entropy to the PRNG state - @param in The data to add - @param inlen Length of the data to add - @param prng PRNG state to update - @return CRYPT_OK if successful -*/ -int sober128_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng) -{ - unsigned char buf[40]; - unsigned long i; - int err; - - LTC_ARGCHK(prng != NULL); - LTC_ARGCHK(in != NULL); - LTC_ARGCHK(inlen > 0); - - LTC_MUTEX_LOCK(&prng->lock); - if (prng->ready) { - /* sober128_ready() was already called, do "rekey" operation */ - if ((err = sober128_stream_keystream(&prng->sober128.s, buf, sizeof(buf))) != CRYPT_OK) goto LBL_UNLOCK; - for(i = 0; i < inlen; i++) buf[i % sizeof(buf)] ^= in[i]; - /* key 32 bytes, 20 rounds */ - if ((err = sober128_stream_setup(&prng->sober128.s, buf, 32)) != CRYPT_OK) goto LBL_UNLOCK; - /* iv 8 bytes */ - if ((err = sober128_stream_setiv(&prng->sober128.s, buf + 32, 8)) != CRYPT_OK) goto LBL_UNLOCK; - /* clear KEY + IV */ - zeromem(buf, sizeof(buf)); - } - else { - /* sober128_ready() was not called yet, add entropy to ent buffer */ - while (inlen--) prng->sober128.ent[prng->sober128.idx++ % sizeof(prng->sober128.ent)] ^= *in++; - } - err = CRYPT_OK; -LBL_UNLOCK: - LTC_MUTEX_UNLOCK(&prng->lock); - return err; -} - -/** - Make the PRNG ready to read from - @param prng The PRNG to make active - @return CRYPT_OK if successful -*/ -int sober128_ready(prng_state *prng) -{ - int err; - - LTC_ARGCHK(prng != NULL); - - LTC_MUTEX_LOCK(&prng->lock); - if (prng->ready) { err = CRYPT_OK; goto LBL_UNLOCK; } - /* key 32 bytes, 20 rounds */ - if ((err = sober128_stream_setup(&prng->sober128.s, prng->sober128.ent, 32)) != CRYPT_OK) goto LBL_UNLOCK; - /* iv 8 bytes */ - if ((err = sober128_stream_setiv(&prng->sober128.s, prng->sober128.ent + 32, 8)) != CRYPT_OK) goto LBL_UNLOCK; - XMEMSET(&prng->sober128.ent, 0, sizeof(prng->sober128.ent)); - prng->sober128.idx = 0; - prng->ready = 1; -LBL_UNLOCK: - LTC_MUTEX_UNLOCK(&prng->lock); - return err; -} - -/** - Read from the PRNG - @param out Destination - @param outlen Length of output - @param prng The active PRNG to read from - @return Number of octets read -*/ -unsigned long sober128_read(unsigned char *out, unsigned long outlen, prng_state *prng) -{ - if (outlen == 0 || prng == NULL || out == NULL) return 0; - LTC_MUTEX_LOCK(&prng->lock); - if (!prng->ready) { outlen = 0; goto LBL_UNLOCK; } - if (sober128_stream_keystream(&prng->sober128.s, out, outlen) != CRYPT_OK) outlen = 0; -LBL_UNLOCK: - LTC_MUTEX_UNLOCK(&prng->lock); - return outlen; -} - -/** - Terminate the PRNG - @param prng The PRNG to terminate - @return CRYPT_OK if successful -*/ -int sober128_done(prng_state *prng) -{ - int err; - LTC_ARGCHK(prng != NULL); - LTC_MUTEX_LOCK(&prng->lock); - prng->ready = 0; - err = sober128_stream_done(&prng->sober128.s); - LTC_MUTEX_UNLOCK(&prng->lock); - LTC_MUTEX_DESTROY(&prng->lock); - return err; -} - -/** - Export the PRNG state - @param out [out] Destination - @param outlen [in/out] Max size and resulting size of the state - @param prng The PRNG to export - @return CRYPT_OK if successful -*/ -int sober128_export(unsigned char *out, unsigned long *outlen, prng_state *prng) -{ - unsigned long len = sober128_desc.export_size; - - LTC_ARGCHK(prng != NULL); - LTC_ARGCHK(out != NULL); - LTC_ARGCHK(outlen != NULL); - - if (*outlen < len) { - *outlen = len; - return CRYPT_BUFFER_OVERFLOW; - } - - if (sober128_read(out, len, prng) != len) { - return CRYPT_ERROR_READPRNG; - } - - *outlen = len; - return CRYPT_OK; -} - -/** - Import a PRNG state - @param in The PRNG state - @param inlen Size of the state - @param prng The PRNG to import - @return CRYPT_OK if successful -*/ -int sober128_import(const unsigned char *in, unsigned long inlen, prng_state *prng) -{ - int err; - - LTC_ARGCHK(prng != NULL); - LTC_ARGCHK(in != NULL); - if (inlen < (unsigned long)sober128_desc.export_size) return CRYPT_INVALID_ARG; - - if ((err = sober128_start(prng)) != CRYPT_OK) return err; - if ((err = sober128_add_entropy(in, inlen, prng)) != CRYPT_OK) return err; - return CRYPT_OK; -} - -/** - PRNG self-test - @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled -*/ -int sober128_test(void) -{ -#ifndef LTC_TEST - return CRYPT_NOP; -#else - prng_state st; - unsigned char en[] = { 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, 0x24, 0x25, 0x26, 0x27, 0x28, - 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32 }; - unsigned char dmp[300]; - unsigned long dmplen = sizeof(dmp); - unsigned char out[500]; - unsigned char t1[] = { 0x31, 0x82, 0xA7, 0xA5, 0x8B, 0xD7, 0xCB, 0x39, 0x86, 0x1A }; - unsigned char t2[] = { 0x6B, 0x43, 0x9E, 0xBC, 0xE7, 0x62, 0x9B, 0xE6, 0x9B, 0x83 }; - unsigned char t3[] = { 0x4A, 0x0E, 0x6C, 0xC1, 0xCF, 0xB4, 0x73, 0x49, 0x99, 0x05 }; - int err; - - if ((err = sober128_start(&st)) != CRYPT_OK) return err; - /* add entropy to uninitialized prng */ - if ((err = sober128_add_entropy(en, sizeof(en), &st)) != CRYPT_OK) return err; - if ((err = sober128_ready(&st)) != CRYPT_OK) return err; - if (sober128_read(out, 10, &st) != 10) return CRYPT_ERROR_READPRNG; /* 10 bytes for testing */ - if (compare_testvector(out, 10, t1, sizeof(t1), "SOBER128-PRNG", 1)) return CRYPT_FAIL_TESTVECTOR; - if (sober128_read(out, 500, &st) != 500) return CRYPT_ERROR_READPRNG; /* skip 500 bytes */ - /* add entropy to already initialized prng */ - if ((err = sober128_add_entropy(en, sizeof(en), &st)) != CRYPT_OK) return err; - if (sober128_read(out, 500, &st) != 500) return CRYPT_ERROR_READPRNG; /* skip 500 bytes */ - if ((err = sober128_export(dmp, &dmplen, &st)) != CRYPT_OK) return err; - if (sober128_read(out, 500, &st) != 500) return CRYPT_ERROR_READPRNG; /* skip 500 bytes */ - if (sober128_read(out, 10, &st) != 10) return CRYPT_ERROR_READPRNG; /* 10 bytes for testing */ - if (compare_testvector(out, 10, t2, sizeof(t2), "SOBER128-PRNG", 2)) return CRYPT_FAIL_TESTVECTOR; - if ((err = sober128_done(&st)) != CRYPT_OK) return err; - if ((err = sober128_import(dmp, dmplen, &st)) != CRYPT_OK) return err; - if ((err = sober128_ready(&st)) != CRYPT_OK) return err; - if (sober128_read(out, 500, &st) != 500) return CRYPT_ERROR_READPRNG; /* skip 500 bytes */ - if (sober128_read(out, 10, &st) != 10) return CRYPT_ERROR_READPRNG; /* 10 bytes for testing */ - if (compare_testvector(out, 10, t3, sizeof(t3), "SOBER128-PRNG", 3)) return CRYPT_FAIL_TESTVECTOR; - if ((err = sober128_done(&st)) != CRYPT_OK) return err; - - return CRYPT_OK; -#endif -} - -#endif - -/* ref: $Format:%D$ */ -/* git commit: $Format:%H$ */ -/* commit time: $Format:%ai$ */