mirror of https://github.com/wolfSSL/wolfssl
sha256: XTRANSFORM refactory to reduce stack usage: (256 bytes - pointer size) moved to the heap.
--- W variable moved to the heap; --- return type changed to int, returning 0 for success; --- chain of dependency updated to propagate the error in Sha256Update and Sha256Final functions. sha512: Transform and Transform384 refactory to reduce stack usage: (128 bytes - pointer size) moved to the heap in each function --- W variable moved to the heap; --- return type changed to int, returning 0 for success; --- chain of dependency updated to propagate the error in Sha512Update, Sha512Final, Sha384Update and Sha384Final functions.
This commit is contained in:
Moisés Guimarães
parent
41cc5f06e4
commit
329cd0b241
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@ -42,6 +42,7 @@
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#endif
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#include <cyassl/ctaocrypt/sha256.h>
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#include <cyassl/ctaocrypt/error-crypt.h>
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#ifdef NO_INLINE
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#include <cyassl/ctaocrypt/misc.h>
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#else
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@ -50,12 +51,8 @@
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#ifdef FREESCALE_MMCAU
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#include "cau_api.h"
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#define XTRANSFORM(S,B) cau_sha256_hash_n((B), 1, ((S))->digest)
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#else
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#define XTRANSFORM(S,B) Transform((S))
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#endif
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#ifndef min
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static INLINE word32 min(word32 a, word32 b)
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@ -88,7 +85,18 @@ int InitSha256(Sha256* sha256)
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return 0;
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}
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#ifndef FREESCALE_MMCAU
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#ifdef FREESCALE_MMCAU
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#define XTRANSFORM(S,B) Transform((S), (B))
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static int Transform(Sha256* sha256, byte* buf)
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{
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cau_sha256_hash_n(buf, 1, sha256->digest);
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return 0;
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}
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#else
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#define XTRANSFORM(S,B) Transform((S))
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static const word32 K[64] = {
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0x428A2F98L, 0x71374491L, 0xB5C0FBCFL, 0xE9B5DBA5L, 0x3956C25BL,
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@ -122,11 +130,16 @@ static const word32 K[64] = {
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h = t0 + t1;
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static void Transform(Sha256* sha256)
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static int Transform(Sha256* sha256)
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{
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word32 S[8], W[64], t0, t1;
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word32 S[8], t0, t1;
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word32* W;
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int i;
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W = (word32*) XMALLOC(sizeof(word32) * 64, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (W == NULL)
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return MEMORY_E;
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/* Copy context->state[] to working vars */
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for (i = 0; i < 8; i++)
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S[i] = sha256->digest[i];
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@ -152,6 +165,10 @@ static void Transform(Sha256* sha256)
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for (i = 0; i < 8; i++) {
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sha256->digest[i] += S[i];
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}
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XFREE(W, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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return 0;
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}
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#endif /* FREESCALE_MMCAU */
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@ -179,11 +196,17 @@ int Sha256Update(Sha256* sha256, const byte* data, word32 len)
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len -= add;
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if (sha256->buffLen == SHA256_BLOCK_SIZE) {
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int ret;
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#if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
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ByteReverseWords(sha256->buffer, sha256->buffer,
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SHA256_BLOCK_SIZE);
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#endif
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XTRANSFORM(sha256, local);
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ret = XTRANSFORM(sha256, local);
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if (ret != 0)
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return ret;
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AddLength(sha256, SHA256_BLOCK_SIZE);
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sha256->buffLen = 0;
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}
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@ -196,6 +219,7 @@ int Sha256Update(Sha256* sha256, const byte* data, word32 len)
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int Sha256Final(Sha256* sha256, byte* hash)
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{
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byte* local = (byte*)sha256->buffer;
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int ret;
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AddLength(sha256, sha256->buffLen); /* before adding pads */
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@ -209,7 +233,11 @@ int Sha256Final(Sha256* sha256, byte* hash)
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#if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
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ByteReverseWords(sha256->buffer, sha256->buffer, SHA256_BLOCK_SIZE);
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#endif
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XTRANSFORM(sha256, local);
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ret = XTRANSFORM(sha256, local);
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if (ret != 0)
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return ret;
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sha256->buffLen = 0;
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}
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XMEMSET(&local[sha256->buffLen], 0, SHA256_PAD_SIZE - sha256->buffLen);
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@ -235,7 +263,10 @@ int Sha256Final(Sha256* sha256, byte* hash)
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2 * sizeof(word32));
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#endif
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XTRANSFORM(sha256, local);
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ret = XTRANSFORM(sha256, local);
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if (ret != 0)
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return ret;
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseWords(sha256->digest, sha256->digest, SHA256_DIGEST_SIZE);
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#endif
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@ -33,6 +33,7 @@
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#endif
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#include <cyassl/ctaocrypt/sha512.h>
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#include <cyassl/ctaocrypt/error-crypt.h>
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#ifdef NO_INLINE
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#include <cyassl/ctaocrypt/misc.h>
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#else
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@ -142,13 +143,17 @@ static const word64 K512[80] = {
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d(i)+=h(i);h(i)+=S0(a(i))+Maj(a(i),b(i),c(i))
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static void Transform(Sha512* sha512)
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static int Transform(Sha512* sha512)
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{
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const word64* K = K512;
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word32 j;
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word64 W[16];
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word64 T[8];
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word64* W;
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W = (word64*) XMALLOC(sizeof(word64) * 16, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (W == NULL)
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return MEMORY_E;
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/* Copy digest to working vars */
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XMEMCPY(T, sha512->digest, sizeof(T));
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@ -184,8 +189,12 @@ static void Transform(Sha512* sha512)
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sha512->digest[7] += h(0);
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/* Wipe variables */
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XMEMSET(W, 0, sizeof(W));
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XMEMSET(W, 0, sizeof(word64) * 16);
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XMEMSET(T, 0, sizeof(T));
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XFREE(W, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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return 0;
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}
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@ -211,11 +220,16 @@ int Sha512Update(Sha512* sha512, const byte* data, word32 len)
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len -= add;
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if (sha512->buffLen == SHA512_BLOCK_SIZE) {
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int ret;
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseWords64(sha512->buffer, sha512->buffer,
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SHA512_BLOCK_SIZE);
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#endif
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Transform(sha512);
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ret = Transform(sha512);
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if (ret != 0)
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return ret;
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AddLength(sha512, SHA512_BLOCK_SIZE);
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sha512->buffLen = 0;
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}
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@ -227,6 +241,7 @@ int Sha512Update(Sha512* sha512, const byte* data, word32 len)
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int Sha512Final(Sha512* sha512, byte* hash)
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{
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byte* local = (byte*)sha512->buffer;
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int ret;
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AddLength(sha512, sha512->buffLen); /* before adding pads */
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@ -240,7 +255,10 @@ int Sha512Final(Sha512* sha512, byte* hash)
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseWords64(sha512->buffer,sha512->buffer,SHA512_BLOCK_SIZE);
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#endif
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Transform(sha512);
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ret = Transform(sha512);
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if (ret != 0)
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return ret;
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sha512->buffLen = 0;
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}
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XMEMSET(&local[sha512->buffLen], 0, SHA512_PAD_SIZE - sha512->buffLen);
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@ -258,7 +276,10 @@ int Sha512Final(Sha512* sha512, byte* hash)
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sha512->buffer[SHA512_BLOCK_SIZE / sizeof(word64) - 2] = sha512->hiLen;
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sha512->buffer[SHA512_BLOCK_SIZE / sizeof(word64) - 1] = sha512->loLen;
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Transform(sha512);
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ret = Transform(sha512);
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if (ret != 0)
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return ret;
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseWords64(sha512->digest, sha512->digest, SHA512_DIGEST_SIZE);
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#endif
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@ -290,13 +311,17 @@ int InitSha384(Sha384* sha384)
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}
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static void Transform384(Sha384* sha384)
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static int Transform384(Sha384* sha384)
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{
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const word64* K = K512;
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word32 j;
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word64 W[16];
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word64 T[8];
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word64* W;
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W = (word64*) XMALLOC(sizeof(word64) * 16, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (W == NULL)
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return MEMORY_E;
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/* Copy digest to working vars */
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XMEMCPY(T, sha384->digest, sizeof(T));
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@ -332,8 +357,12 @@ static void Transform384(Sha384* sha384)
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sha384->digest[7] += h(0);
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/* Wipe variables */
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XMEMSET(W, 0, sizeof(W));
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XMEMSET(W, 0, sizeof(word64) * 16);
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XMEMSET(T, 0, sizeof(T));
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XFREE(W, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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return 0;
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}
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@ -359,11 +388,16 @@ int Sha384Update(Sha384* sha384, const byte* data, word32 len)
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len -= add;
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if (sha384->buffLen == SHA384_BLOCK_SIZE) {
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int ret;
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseWords64(sha384->buffer, sha384->buffer,
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SHA384_BLOCK_SIZE);
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#endif
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Transform384(sha384);
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ret = Transform384(sha384);
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if (ret != 0)
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return ret;
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AddLength384(sha384, SHA384_BLOCK_SIZE);
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sha384->buffLen = 0;
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}
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@ -375,6 +409,7 @@ int Sha384Update(Sha384* sha384, const byte* data, word32 len)
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int Sha384Final(Sha384* sha384, byte* hash)
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{
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byte* local = (byte*)sha384->buffer;
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int ret;
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AddLength384(sha384, sha384->buffLen); /* before adding pads */
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@ -388,7 +423,10 @@ int Sha384Final(Sha384* sha384, byte* hash)
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseWords64(sha384->buffer,sha384->buffer,SHA384_BLOCK_SIZE);
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#endif
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Transform384(sha384);
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ret = Transform384(sha384);
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if (ret != 0)
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return ret;
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sha384->buffLen = 0;
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}
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XMEMSET(&local[sha384->buffLen], 0, SHA384_PAD_SIZE - sha384->buffLen);
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@ -406,7 +444,10 @@ int Sha384Final(Sha384* sha384, byte* hash)
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sha384->buffer[SHA384_BLOCK_SIZE / sizeof(word64) - 2] = sha384->hiLen;
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sha384->buffer[SHA384_BLOCK_SIZE / sizeof(word64) - 1] = sha384->loLen;
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Transform384(sha384);
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ret = Transform384(sha384);
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if (ret != 0)
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return ret;
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseWords64(sha384->digest, sha384->digest, SHA384_DIGEST_SIZE);
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#endif
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