From 3602a99dd3ed1b20dc359734cd36316a7ee5c27e Mon Sep 17 00:00:00 2001 From: bg Date: Sat, 26 Dec 2009 15:03:17 +0000 Subject: [PATCH] extending sha256 (C) --- host/shavs_test2.rb | 3 ++- sha256/sha256.c | 36 +++++++++++++++++++++--------------- test_src/shavs.c | 5 +++-- testconf/Sha256.conf | 8 ++++++++ 4 files changed, 34 insertions(+), 18 deletions(-) create mode 100644 testconf/Sha256.conf diff --git a/host/shavs_test2.rb b/host/shavs_test2.rb index 18b547a..d4ddef4 100644 --- a/host/shavs_test2.rb +++ b/host/shavs_test2.rb @@ -205,7 +205,7 @@ end # MAIN # ################################################################################ -opts = Getopt::Std.getopts("s:f:i:hdca") +opts = Getopt::Std.getopts("s:f:i:j:hdca") conf = Hash.new conf = readconfigfile("/etc/testport.conf", conf) @@ -266,6 +266,7 @@ algo_tasks.each do |algoa| next else i=0 + i = opts["j"] if opts["j"] logfile=File.open(conf["PORT"]["testlogbase"]+algo+".txt", "a") while conf[algo]["file_#{i}"] != nil puts("Testing #{algo} with #{conf[algo]["file_#{i}"]}") diff --git a/sha256/sha256.c b/sha256/sha256.c index f654968..757ff77 100644 --- a/sha256/sha256.c +++ b/sha256/sha256.c @@ -18,15 +18,15 @@ */ /** * \file sha256.c - * \author Daniel Otte + * \author Daniel Otte * \date 16.05.2006 - * - * \par License: + * + * \par License: * GPL - * + * * \brief SHA-256 implementation. - * - * + * + * */ #include @@ -52,7 +52,7 @@ uint32_t sha256_init_vector[]={ /*************************************************************************/ /** - * \brief \c sh256_init initialises a sha256 context for hashing. + * \brief \c sh256_init initialises a sha256 context for hashing. * \c sh256_init c initialises the given sha256 context for hashing * @param state pointer to a sha256 context * @return none @@ -125,10 +125,10 @@ void sha256_nextBlock (sha256_ctx_t *state, const void* block){ memcpy((void*)w, block, 64); #endif for (i=16; i<64; ++i){ - w[i] = SIGMA_b(w[i-2]) + w[i-7] + SIGMA_a(w[i-15]) + w[i-16]; + w[i] = SIGMA_b(w[i-2]) + w[i-7] + SIGMA_a(w[i-15]) + w[i-16]; } - /* init working variables */ + /* init working variables */ memcpy((void*)a,(void*)(state->h), 8*4); /* do the, fun stuff, */ @@ -143,9 +143,9 @@ void sha256_nextBlock (sha256_ctx_t *state, const void* block){ /* update, the, state, */ for (i=0; i<8; ++i){ state->h[i] += a[i]; - } + } state->length += 512; -} +} /*************************************************************************/ @@ -156,13 +156,19 @@ void sha256_nextBlock (sha256_ctx_t *state, const void* block){ * @param block Pointer to the message wich should be hashed. * @param length is the length of only THIS block in BITS not in bytes! * bits are big endian, meaning high bits come first. - * if you have a message with bits at the end, the byte must be padded with zeros + * if you have a message with bits at the end, the byte must be padded with zeros */ void sha256_lastBlock(sha256_ctx_t *state, const void* block, uint16_t length){ uint8_t lb[SHA256_BLOCK_BITS/8]; /* local block */ + while(length>=SHA256_BLOCK_BITS){ + sha256_nextBlock(state, block); + length -= SHA256_BLOCK_BITS; + block = (uint8_t*)block+SHA256_BLOCK_BYTES; + } + state->length += length; memcpy (&(lb[0]), block, length/8); - + /* set the final one bit */ if (length & 0x7){ // if we have single bits at the end lb[length/8] = ((uint8_t*)(block))[length/8]; @@ -176,13 +182,13 @@ void sha256_lastBlock(sha256_ctx_t *state, const void* block, uint16_t length){ memset((void*)(&(lb[length])), 0, 64-length); sha256_nextBlock(state, lb); state->length -= 512; - length = 0; + length = 0; } memset((void*)(&(lb[length])), 0, 56-length); /* store the 64bit length value */ #if defined LITTLE_ENDIAN /* this is now rolled up */ - uint8_t i; + uint8_t i; for (i=1; i<=8; ++i){ lb[55+i] = (uint8_t)(state->length>>(64- 8*i)); } diff --git a/test_src/shavs.c b/test_src/shavs.c index 5f07390..f4b38ad 100644 --- a/test_src/shavs.c +++ b/test_src/shavs.c @@ -135,11 +135,12 @@ uint8_t buffer_add(char c){ t |= v; shavs_ctx.buffer[shavs_ctx.buffer_idx]=t; shavs_ctx.buffer_idx++; + shavs_ctx.in_byte = 0; }else{ t |= v<<4; shavs_ctx.buffer[shavs_ctx.buffer_idx]=t; + shavs_ctx.in_byte = 1; } - shavs_ctx.in_byte ^= 1; return 0; } @@ -180,7 +181,7 @@ void shavs_test1(void){ char c; uint8_t diggest[pgm_read_word(shavs_algo->hashsize_b)/8]; shavs_ctx.buffersize_B=pgm_read_word(&(shavs_algo->blocksize_b))/8; - uint8_t buffer[shavs_ctx.buffersize_B+1]; + uint8_t buffer[shavs_ctx.buffersize_B+5]; shavs_ctx.buffer = buffer; cli_putstr_P(PSTR("\r\nbuffer_size = 0x")); cli_hexdump_rev(&(shavs_ctx.buffersize_B), 2); diff --git a/testconf/Sha256.conf b/testconf/Sha256.conf new file mode 100644 index 0000000..dcba566 --- /dev/null +++ b/testconf/Sha256.conf @@ -0,0 +1,8 @@ + +[SHA-256] +algo=a +file_0=testvectors/shavs/SHA1+2/BitTestVectors/SHA256ShortMsg.txt +file_1=testvectors/shavs/SHA1+2/BitTestVectors/SHA256LongMsg.txt +file_2=testvectors/shavs/SHA1+2/ByteTestVectors/SHA256ShortMsg.txt +file_3=testvectors/shavs/SHA1+2/ByteTestVectors/SHA256LongMsg.txt + -- 2.39.2