From: Eneas U de Queiroz Date: Mon, 5 Aug 2019 17:45:41 +0000 (-0300) Subject: wolfssl: fixes for CVE-2018-16870 & CVE-2019-13628 X-Git-Tag: v18.06.5~55 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2df2b75208dce06dee02508c8d589fc5f540023d;p=openwrt%2Fstaging%2Fpepe2k.git wolfssl: fixes for CVE-2018-16870 & CVE-2019-13628 CVE-2018-16870: medium-severity, new variant of the Bleichenbacher attack to perform downgrade attacks against TLS, which may lead to leakage of sensible data. Backported from 3.15.7. CVE-2019-13628 (currently assigned-only): potential leak of nonce sizes when performing ECDSA signing operations. The leak is considered to be difficult to exploit but it could potentially be used maliciously to perform a lattice based timing attack. Backported from 4.1.0. Signed-off-by: Eneas U de Queiroz --- diff --git a/package/libs/wolfssl/Makefile b/package/libs/wolfssl/Makefile index a01a8949aa..6f29cd668d 100644 --- a/package/libs/wolfssl/Makefile +++ b/package/libs/wolfssl/Makefile @@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk PKG_NAME:=wolfssl PKG_VERSION:=3.15.3-stable -PKG_RELEASE:=1 +PKG_RELEASE:=2 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).zip # PKG_SOURCE_URL:=https://www.wolfssl.com/ @@ -21,7 +21,8 @@ PKG_INSTALL:=1 PKG_USE_MIPS16:=0 PKG_BUILD_PARALLEL:=1 PKG_LICENSE:=GPL-2.0+ -PKG_CPE_ID:=cpe:/a:yassl:cyassl +PKG_MAINTAINER:=Eneas U de Queiroz +PKG_CPE_ID:=cpe:/a:wolfssl:wolfssl PKG_CONFIG_DEPENDS:=\ CONFIG_WOLFSSL_HAS_AES_CCM CONFIG_WOLFSSL_HAS_AES_GCM \ diff --git a/package/libs/wolfssl/patches/010-Make-RsaUnPad-constant-time-when-Block-Type-2-messag.patch b/package/libs/wolfssl/patches/010-Make-RsaUnPad-constant-time-when-Block-Type-2-messag.patch new file mode 100644 index 0000000000..4a357a5dfb --- /dev/null +++ b/package/libs/wolfssl/patches/010-Make-RsaUnPad-constant-time-when-Block-Type-2-messag.patch @@ -0,0 +1,562 @@ +From 278d54d95de9fa80b4ac9f6dd0f900841114ca8c Mon Sep 17 00:00:00 2001 +From: Sean Parkinson +Date: Mon, 27 Aug 2018 10:16:40 +1000 +Subject: [PATCH] Make RsaUnPad constant time when Block Type 2 message + +(cherry picked from commit ab03f9291b040269ae21d33b9f01529ed8311728) +[cherry-pick changes] +Signed-off-by: Eneas U de Queiroz + +--- a/src/internal.c ++++ b/src/internal.c +@@ -24766,26 +24766,22 @@ static int DoSessionTicket(WOLFSSL* ssl, + * indistinguishable from correctly formatted RSA blocks + */ + +- ret = args->lastErr; + args->lastErr = 0; /* reset */ + + /* build PreMasterSecret */ + ssl->arrays->preMasterSecret[0] = ssl->chVersion.major; + ssl->arrays->preMasterSecret[1] = ssl->chVersion.minor; +- if (ret == 0 && args->sigSz == SECRET_LEN && +- args->output != NULL) { ++ if (args->output != NULL) { + XMEMCPY(&ssl->arrays->preMasterSecret[VERSION_SZ], +- &args->output[VERSION_SZ], +- SECRET_LEN - VERSION_SZ); ++ &args->output[VERSION_SZ], ++ SECRET_LEN - VERSION_SZ); + } +- else { +- /* preMasterSecret has RNG and version set */ +- /* return proper length and ignore error */ +- /* error will be caught as decryption error */ +- args->sigSz = SECRET_LEN; +- ret = 0; +- } +- ++ /* preMasterSecret has RNG and version set ++ * return proper length and ignore error ++ * error will be caught as decryption error ++ */ ++ args->sigSz = SECRET_LEN; ++ ret = 0; + break; + } /* rsa_kea */ + #endif /* !NO_RSA */ +--- a/src/tls.c ++++ b/src/tls.c +@@ -1136,12 +1136,12 @@ static int Hmac_UpdateFinal_CT(Hmac* hma + else if (k < maxLen) + b = in[k - WOLFSSL_TLS_HMAC_INNER_SZ]; + +- b = ctMaskSel(atEoc, b, 0x80); ++ b = ctMaskSel(atEoc, 0x80, b); + b &= ~pastEoc; + b &= ~isOutBlock | isEocBlock; + + if (j >= blockSz - 8) { +- b = ctMaskSel(isOutBlock, b, lenBytes[j - (blockSz - 8)]); ++ b = ctMaskSel(isOutBlock, lenBytes[j - (blockSz - 8)], b); + } + + hashBlock[j] = b; +--- a/wolfcrypt/src/integer.c ++++ b/wolfcrypt/src/integer.c +@@ -321,6 +321,17 @@ int mp_to_unsigned_bin (mp_int * a, unsi + return res; + } + ++int mp_to_unsigned_bin_len(mp_int * a, unsigned char *b, int c) ++{ ++ int i, len; ++ ++ len = mp_unsigned_bin_size(a); ++ ++ /* pad front w/ zeros to match length */ ++ for (i = 0; i < c - len; i++) ++ b[i] = 0x00; ++ return mp_to_unsigned_bin(a, b + i); ++} + + /* creates "a" then copies b into it */ + int mp_init_copy (mp_int * a, mp_int * b) +--- a/wolfcrypt/src/misc.c ++++ b/wolfcrypt/src/misc.c +@@ -341,10 +341,22 @@ STATIC INLINE byte ctMaskEq(int a, int b + return 0 - (a == b); + } + +-/* Constant time - select b when mask is set and a otherwise. */ ++/* Constant time - mask set when a != b. */ ++STATIC INLINE byte ctMaskNotEq(int a, int b) ++{ ++ return 0 - (a != b); ++} ++ ++/* Constant time - select a when mask is set and b otherwise. */ + STATIC INLINE byte ctMaskSel(byte m, byte a, byte b) + { +- return (a & ~m) | (b & m); ++ return (b & ~m) | (a & m); ++} ++ ++/* Constant time - select integer a when mask is set and integer b otherwise. */ ++STATIC INLINE int ctMaskSelInt(byte m, int a, int b) ++{ ++ return (b & (~(int)(char)m)) | (a & ((int)(char)m)); + } + + /* Constant time - bit set when a <= b. */ +--- a/wolfcrypt/src/rsa.c ++++ b/wolfcrypt/src/rsa.c +@@ -989,10 +989,8 @@ static int RsaUnPad_OAEP(byte *pkcsBlock + ret += pkcsBlock[idx++] ^ 0x01; /* separator value is 0x01 */ + ret += pkcsBlock[0] ^ 0x00; /* Y, the first value, should be 0 */ + +- if (ret != 0) { +- WOLFSSL_MSG("RsaUnPad_OAEP: Padding Error"); +- return BAD_PADDING_E; +- } ++ /* Return 0 data length on error. */ ++ idx = ctMaskSelInt(ctMaskEq(ret, 0), idx, pkcsBlockLen); + + /* adjust pointer to correct location in array and return size of M */ + *output = (byte*)(pkcsBlock + idx); +@@ -1078,48 +1076,60 @@ static int RsaUnPad_PSS(byte *pkcsBlock, + /* UnPad plaintext, set start to *output, return length of plaintext, + * < 0 on error */ + static int RsaUnPad(const byte *pkcsBlock, unsigned int pkcsBlockLen, +- byte **output, byte padValue) ++ byte **output, byte padValue) + { +- word32 maxOutputLen = (pkcsBlockLen > 10) ? (pkcsBlockLen - 10) : 0; +- word32 invalid = 0; +- word32 i = 1; +- word32 outputLen; ++ int ret; ++ word32 i; ++ byte invalid = 0; + + if (output == NULL || pkcsBlockLen == 0) { + return BAD_FUNC_ARG; + } + +- if (pkcsBlock[0] != 0x0) { /* skip past zero */ +- invalid = 1; +- } +- pkcsBlock++; pkcsBlockLen--; ++ if (padValue == RSA_BLOCK_TYPE_1) { ++ /* First byte must be 0x00 and Second byte, block type, 0x01 */ ++ if (pkcsBlock[0] != 0 || pkcsBlock[1] != RSA_BLOCK_TYPE_1) { ++ WOLFSSL_MSG("RsaUnPad error, invalid formatting"); ++ return RSA_PAD_E; ++ } + +- /* Require block type padValue */ +- invalid = (pkcsBlock[0] != padValue) || invalid; ++ /* check the padding until we find the separator */ ++ for (i = 2; i < pkcsBlockLen && pkcsBlock[i++] == 0xFF; ) { } + +- /* verify the padding until we find the separator */ +- if (padValue == RSA_BLOCK_TYPE_1) { +- while (i maxOutputLen) || invalid; ++ /* Decrypted with private key - unpad must be constant time. */ ++ for (i = 0, j = 2; j < pkcsBlockLen; j++) { ++ /* Update i if not passed the separator and at separator. */ ++ i |= (~pastSep) & ctMaskEq(pkcsBlock[j], 0x00) & (j + 1); ++ pastSep |= ctMaskEq(pkcsBlock[j], 0x00); ++ } ++ ++ /* Minimum of 11 bytes of pre-message data - including leading 0x00. */ ++ invalid |= ctMaskLT(i, RSA_MIN_PAD_SZ); ++ /* Must have seen separator. */ ++ invalid |= ~pastSep; ++ /* First byte must be 0x00. */ ++ invalid |= ctMaskNotEq(pkcsBlock[0], 0x00); ++ /* Check against expected block type: padValue */ ++ invalid |= ctMaskNotEq(pkcsBlock[1], padValue); + +- if (invalid) { +- WOLFSSL_MSG("RsaUnPad error, invalid formatting"); +- return RSA_PAD_E; ++ *output = (byte *)(pkcsBlock + i); ++ ret = ((int)~invalid) & (pkcsBlockLen - i); + } + +- *output = (byte *)(pkcsBlock + i); +- return outputLen; ++ return ret; + } + + /* helper function to direct unpadding +@@ -1249,7 +1259,7 @@ static int wc_RsaFunctionSync(const byte + mp_int rnd, rndi; + #endif + int ret = 0; +- word32 keyLen, len; ++ word32 keyLen; + #endif + + #ifdef WOLFSSL_HAVE_SP_RSA +@@ -1308,6 +1318,7 @@ static int wc_RsaFunctionSync(const byte + } + #endif + ++#ifndef TEST_UNPAD_CONSTANT_TIME + if (mp_read_unsigned_bin(&tmp, (byte*)in, inLen) != MP_OKAY) + ERROR_OUT(MP_READ_E); + +@@ -1418,21 +1429,18 @@ static int wc_RsaFunctionSync(const byte + ERROR_OUT(RSA_BUFFER_E); + } + +- len = mp_unsigned_bin_size(&tmp); +- +- /* pad front w/ zeros to match key length */ +- while (len < keyLen) { +- *out++ = 0x00; +- len++; +- } +- + *outLen = keyLen; +- +- /* convert */ +- if (mp_to_unsigned_bin(&tmp, out) != MP_OKAY) ++ if (mp_to_unsigned_bin_len(&tmp, out, keyLen) != MP_OKAY) + ERROR_OUT(MP_TO_E); + + done: ++#else ++ (void)type; ++ (void)key; ++ (void)keyLen; ++ XMEMCPY(out, in, inLen); ++ *outLen = inLen; ++#endif + mp_clear(&tmp); + #ifdef WC_RSA_BLINDING + if (type == RSA_PRIVATE_DECRYPT || type == RSA_PRIVATE_ENCRYPT) { +@@ -1633,6 +1641,7 @@ int wc_RsaFunction(const byte* in, word3 + } + #endif + ++#ifndef TEST_UNPAD_CONSTANT_TIME + #ifndef NO_RSA_BOUNDS_CHECK + if (type == RSA_PRIVATE_DECRYPT && + key->state == RSA_STATE_DECRYPT_EXPTMOD) { +@@ -1667,6 +1676,7 @@ int wc_RsaFunction(const byte* in, word3 + return ret; + } + #endif /* NO_RSA_BOUNDS_CHECK */ ++#endif + + #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) + if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA && +@@ -1880,7 +1890,8 @@ static int RsaPrivateDecryptEx(byte* in, + + /* if not doing this inline then allocate a buffer for it */ + if (outPtr == NULL) { +- key->data = (byte*)XMALLOC(inLen, key->heap, DYNAMIC_TYPE_WOLF_BIGINT); ++ key->data = (byte*)XMALLOC(inLen, key->heap, ++ DYNAMIC_TYPE_WOLF_BIGINT); + key->dataIsAlloc = 1; + if (key->data == NULL) { + ret = MEMORY_E; +@@ -1909,20 +1920,29 @@ static int RsaPrivateDecryptEx(byte* in, + ret = wc_RsaUnPad_ex(key->data, key->dataLen, &pad, pad_value, pad_type, + hash, mgf, label, labelSz, saltLen, + mp_count_bits(&key->n), key->heap); +- if (ret > 0 && ret <= (int)outLen && pad != NULL) { ++ if (rsa_type == RSA_PUBLIC_DECRYPT && ret > (int)outLen) ++ ret = RSA_BUFFER_E; ++ else if (ret >= 0 && pad != NULL) { ++ char c; ++ + /* only copy output if not inline */ + if (outPtr == NULL) { +- XMEMCPY(out, pad, ret); ++ word32 i, j; ++ int start = (int)((size_t)pad - (size_t)key->data); ++ ++ for (i = 0, j = 0; j < key->dataLen; j++) { ++ out[i] = key->data[j]; ++ c = ctMaskGTE(j, start); ++ c &= ctMaskLT(i, outLen); ++ /* 0 - no add, -1 add */ ++ i += -c; ++ } + } +- else { ++ else + *outPtr = pad; +- } +- } +- else if (ret >= 0) { +- ret = RSA_BUFFER_E; +- } +- if (ret < 0) { +- break; ++ ++ ret = ctMaskSelInt(ctMaskLTE(ret, outLen), ret, RSA_BUFFER_E); ++ ret = ctMaskSelInt(ctMaskNotEq(ret, 0), ret, RSA_BUFFER_E); + } + + key->state = RSA_STATE_DECRYPT_RES; +@@ -1934,12 +1954,14 @@ static int RsaPrivateDecryptEx(byte* in, + defined(HAVE_CAVIUM) + if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA && + pad_type != WC_RSA_PSS_PAD) { +- /* convert result */ +- byte* dataLen = (byte*)&key->dataLen; +- ret = (dataLen[0] << 8) | (dataLen[1]); ++ if (ret > 0) { ++ /* convert result */ ++ byte* dataLen = (byte*)&key->dataLen; ++ ret = (dataLen[0] << 8) | (dataLen[1]); + +- if (outPtr) +- *outPtr = in; ++ if (outPtr) ++ *outPtr = in; ++ } + } + #endif + break; +--- a/wolfcrypt/src/sp_int.c ++++ b/wolfcrypt/src/sp_int.c +@@ -286,7 +286,8 @@ int sp_leading_bit(sp_int* a) + * The array must be large enough for encoded number - use mp_unsigned_bin_size + * to calculate the number of bytes required. + * +- * a SP integer. ++ * a SP integer. ++ * out Array to put encoding into. + * returns MP_OKAY always. + */ + int sp_to_unsigned_bin(sp_int* a, byte* out) +@@ -305,6 +306,31 @@ int sp_to_unsigned_bin(sp_int* a, byte* + return MP_OKAY; + } + ++/* Convert the big number to an array of bytes in big-endian format. ++ * The array must be large enough for encoded number - use mp_unsigned_bin_size ++ * to calculate the number of bytes required. ++ * Front-pads the output array with zeros make number the size of the array. ++ * ++ * a SP integer. ++ * out Array to put encoding into. ++ * outSz Size of the array. ++ * returns MP_OKAY always. ++ */ ++int sp_to_unsigned_bin_len(sp_int* a, byte* out, int outSz) ++{ ++ int i, j, b; ++ ++ j = outSz - 1; ++ for (i=0; j>=0; i++) { ++ for (b = 0; b < SP_WORD_SIZE; b += 8) { ++ out[j--] = a->dp[i] >> b; ++ if (j < 0) ++ break; ++ } ++ } ++ ++ return MP_OKAY; ++} + /* Ensure the data in the big number is zeroed. + * + * a SP integer. +--- a/wolfcrypt/src/tfm.c ++++ b/wolfcrypt/src/tfm.c +@@ -1964,6 +1964,48 @@ void fp_to_unsigned_bin(fp_int *a, unsig + fp_reverse (b, x); + } + ++int fp_to_unsigned_bin_len(fp_int *a, unsigned char *b, int c) ++{ ++#if DIGIT_BIT == 64 || DIGIT_BIT == 32 ++ int i, j, x; ++ ++ for (x=c-1,j=0,i=0; x >= 0; x--) { ++ b[x] = (unsigned char)(a->dp[i] >> j); ++ j += 8; ++ i += j == DIGIT_BIT; ++ j &= DIGIT_BIT - 1; ++ } ++ ++ return FP_OKAY; ++#else ++ int x; ++#ifndef WOLFSSL_SMALL_STACK ++ fp_int t[1]; ++#else ++ fp_int *t; ++#endif ++ ++#ifdef WOLFSSL_SMALL_STACK ++ t = (fp_int*)XMALLOC(sizeof(fp_int), NULL, DYNAMIC_TYPE_TMP_BUFFER); ++ if (t == NULL) ++ return FP_MEM; ++#endif ++ ++ fp_init_copy(t, a); ++ ++ for (x = 0; x < c; x++) { ++ b[x] = (unsigned char) (t->dp[0] & 255); ++ fp_div_2d (t, 8, t, NULL); ++ } ++ fp_reverse (b, x); ++ ++#ifdef WOLFSSL_SMALL_STACK ++ XFREE(t, NULL, DYNAMIC_TYPE_TMP_BUFFER); ++#endif ++ return FP_OKAY; ++#endif ++} ++ + int fp_unsigned_bin_size(fp_int *a) + { + int size = fp_count_bits (a); +@@ -2435,6 +2477,10 @@ int mp_to_unsigned_bin (mp_int * a, unsi + return MP_OKAY; + } + ++int mp_to_unsigned_bin_len(mp_int * a, unsigned char *b, int c) ++{ ++ return fp_to_unsigned_bin_len(a, b, c); ++} + /* reads a unsigned char array, assumes the msb is stored first [big endian] */ + int mp_read_unsigned_bin (mp_int * a, const unsigned char *b, int c) + { +--- a/wolfssl/wolfcrypt/integer.h ++++ b/wolfssl/wolfcrypt/integer.h +@@ -277,6 +277,7 @@ MP_API int mp_unsigned_bin_size(mp_int + MP_API int mp_read_unsigned_bin (mp_int * a, const unsigned char *b, int c); + MP_API int mp_to_unsigned_bin_at_pos(int x, mp_int *t, unsigned char *b); + MP_API int mp_to_unsigned_bin (mp_int * a, unsigned char *b); ++MP_API int mp_to_unsigned_bin_len(mp_int * a, unsigned char *b, int c); + MP_API int mp_exptmod (mp_int * G, mp_int * X, mp_int * P, mp_int * Y); + /* end functions needed by Rsa */ + +--- a/wolfssl/wolfcrypt/misc.h ++++ b/wolfssl/wolfcrypt/misc.h +@@ -97,7 +97,9 @@ WOLFSSL_LOCAL byte ctMaskGTE(int a, int + WOLFSSL_LOCAL byte ctMaskLT(int a, int b); + WOLFSSL_LOCAL byte ctMaskLTE(int a, int b); + WOLFSSL_LOCAL byte ctMaskEq(int a, int b); ++WOLFSSL_LOCAL byte ctMaskNotEq(int a, int b); + WOLFSSL_LOCAL byte ctMaskSel(byte m, byte a, byte b); ++WOLFSSL_LOCAL int ctMaskSelInt(byte m, int a, int b); + WOLFSSL_LOCAL byte ctSetLTE(int a, int b); + + #endif /* NO_INLINE */ +--- a/wolfssl/wolfcrypt/sp_int.h ++++ b/wolfssl/wolfcrypt/sp_int.h +@@ -119,7 +119,8 @@ MP_API int sp_read_radix(sp_int* a, cons + MP_API int sp_cmp(sp_int* a, sp_int* b); + MP_API int sp_count_bits(sp_int* a); + MP_API int sp_leading_bit(sp_int* a); +-MP_API int sp_to_unsigned_bin(sp_int* a, byte* in); ++MP_API int sp_to_unsigned_bin(sp_int* a, byte* out); ++MP_API int sp_to_unsigned_bin_len(sp_int* a, byte* out, int outSz); + MP_API void sp_forcezero(sp_int* a); + MP_API int sp_copy(sp_int* a, sp_int* b); + MP_API int sp_set(sp_int* a, sp_int_digit d); +@@ -156,30 +157,31 @@ typedef sp_digit mp_digit; + + #define mp_free(a) + +-#define mp_init sp_init +-#define mp_init_multi sp_init_multi +-#define mp_clear sp_clear +-#define mp_read_unsigned_bin sp_read_unsigned_bin +-#define mp_unsigned_bin_size sp_unsigned_bin_size +-#define mp_read_radix sp_read_radix +-#define mp_cmp sp_cmp +-#define mp_count_bits sp_count_bits +-#define mp_leading_bit sp_leading_bit +-#define mp_to_unsigned_bin sp_to_unsigned_bin +-#define mp_forcezero sp_forcezero +-#define mp_copy sp_copy +-#define mp_set sp_set +-#define mp_iszero sp_iszero +-#define mp_clamp sp_clamp +-#define mp_grow sp_grow +-#define mp_sub_d sp_sub_d +-#define mp_cmp_d sp_cmp_d +-#define mp_mod sp_mod +-#define mp_zero sp_zero +-#define mp_add_d sp_add_d +-#define mp_lshd sp_lshd +-#define mp_add sp_add +-#define mp_isodd sp_isodd ++#define mp_init sp_init ++#define mp_init_multi sp_init_multi ++#define mp_clear sp_clear ++#define mp_read_unsigned_bin sp_read_unsigned_bin ++#define mp_unsigned_bin_size sp_unsigned_bin_size ++#define mp_read_radix sp_read_radix ++#define mp_cmp sp_cmp ++#define mp_count_bits sp_count_bits ++#define mp_leading_bit sp_leading_bit ++#define mp_to_unsigned_bin sp_to_unsigned_bin ++#define mp_to_unsigned_bin_len sp_to_unsigned_bin_len ++#define mp_forcezero sp_forcezero ++#define mp_copy sp_copy ++#define mp_set sp_set ++#define mp_iszero sp_iszero ++#define mp_clamp sp_clamp ++#define mp_grow sp_grow ++#define mp_sub_d sp_sub_d ++#define mp_cmp_d sp_cmp_d ++#define mp_mod sp_mod ++#define mp_zero sp_zero ++#define mp_add_d sp_add_d ++#define mp_lshd sp_lshd ++#define mp_add sp_add ++#define mp_isodd sp_isodd + + #define MP_INT_DEFINED + +--- a/wolfssl/wolfcrypt/tfm.h ++++ b/wolfssl/wolfcrypt/tfm.h +@@ -563,6 +563,7 @@ int fp_leading_bit(fp_int *a); + int fp_unsigned_bin_size(fp_int *a); + void fp_read_unsigned_bin(fp_int *a, const unsigned char *b, int c); + void fp_to_unsigned_bin(fp_int *a, unsigned char *b); ++int fp_to_unsigned_bin_len(fp_int *a, unsigned char *b, int c); + int fp_to_unsigned_bin_at_pos(int x, fp_int *t, unsigned char *b); + + /*int fp_signed_bin_size(fp_int *a);*/ +@@ -686,6 +687,7 @@ MP_API int mp_unsigned_bin_size(mp_int + MP_API int mp_read_unsigned_bin (mp_int * a, const unsigned char *b, int c); + MP_API int mp_to_unsigned_bin_at_pos(int x, mp_int *t, unsigned char *b); + MP_API int mp_to_unsigned_bin (mp_int * a, unsigned char *b); ++MP_API int mp_to_unsigned_bin_len(mp_int * a, unsigned char *b, int c); + + MP_API int mp_sub_d(fp_int *a, fp_digit b, fp_int *c); + MP_API int mp_copy(fp_int* a, fp_int* b); diff --git a/package/libs/wolfssl/patches/020-Improve-nonce-use-in-ECC-mulmod.patch b/package/libs/wolfssl/patches/020-Improve-nonce-use-in-ECC-mulmod.patch new file mode 100644 index 0000000000..28ef4e48ad --- /dev/null +++ b/package/libs/wolfssl/patches/020-Improve-nonce-use-in-ECC-mulmod.patch @@ -0,0 +1,98 @@ +From ba4d612892bf6e3aae9cca7edce2a6d6b43e3e22 Mon Sep 17 00:00:00 2001 +From: Sean Parkinson +Date: Wed, 17 Jul 2019 08:26:02 +1000 +Subject: [PATCH] Improve nonce use in ECC mulmod + +(cherry picked from commit 483f6a5acd9808b405306661c121aa6407464dc2) + +--- a/wolfcrypt/src/ecc.c ++++ b/wolfcrypt/src/ecc.c +@@ -2039,7 +2039,7 @@ int wc_ecc_mulmod_ex(mp_int* k, ecc_poin + #define M_POINTS 8 + int first = 1, bitbuf = 0, bitcpy = 0, j; + #else +- #define M_POINTS 3 ++ #define M_POINTS 4 + #endif + + ecc_point *tG, *M[M_POINTS]; +@@ -2253,7 +2253,9 @@ int wc_ecc_mulmod_ex(mp_int* k, ecc_poin + mode = 0; + bitcnt = 1; + buf = 0; +- digidx = get_digit_count(k) - 1; ++ digidx = get_digit_count(modulus) - 1; ++ /* The order MAY be 1 bit longer than the modulus. */ ++ digidx += (modulus->dp[digidx] >> (DIGIT_BIT-1)); + + /* perform ops */ + if (err == MP_OKAY) { +@@ -2272,25 +2274,53 @@ int wc_ecc_mulmod_ex(mp_int* k, ecc_poin + i = (buf >> (DIGIT_BIT - 1)) & 1; + buf <<= 1; + +- if (mode == 0 && i == 0) { ++ if (mode == 0) { ++ mode = i; + /* timing resistant - dummy operations */ + if (err == MP_OKAY) +- err = ecc_projective_add_point(M[0], M[1], M[2], a, modulus, ++ err = ecc_projective_add_point(M[1], M[2], M[2], a, modulus, + mp); ++#ifdef WC_NO_CACHE_RESISTANT + if (err == MP_OKAY) +- err = ecc_projective_dbl_point(M[1], M[2], a, modulus, mp); +- if (err == MP_OKAY) +- continue; +- } +- +- if (mode == 0 && i == 1) { +- mode = 1; +- /* timing resistant - dummy operations */ +- if (err == MP_OKAY) +- err = ecc_projective_add_point(M[0], M[1], M[2], a, modulus, +- mp); +- if (err == MP_OKAY) +- err = ecc_projective_dbl_point(M[1], M[2], a, modulus, mp); ++ err = ecc_projective_dbl_point(M[2], M[3], a, modulus, mp); ++#else ++ /* instead of using M[i] for double, which leaks key bit to cache ++ * monitor, use M[2] as temp, make sure address calc is constant, ++ * keep M[0] and M[1] in cache */ ++ if (err == MP_OKAY) ++ err = mp_copy((mp_int*) ++ ( ((wolfssl_word)M[0]->x & wc_off_on_addr[i^1]) + ++ ((wolfssl_word)M[1]->x & wc_off_on_addr[i])), ++ M[2]->x); ++ if (err == MP_OKAY) ++ err = mp_copy((mp_int*) ++ ( ((wolfssl_word)M[0]->y & wc_off_on_addr[i^1]) + ++ ((wolfssl_word)M[1]->y & wc_off_on_addr[i])), ++ M[2]->y); ++ if (err == MP_OKAY) ++ err = mp_copy((mp_int*) ++ ( ((wolfssl_word)M[0]->z & wc_off_on_addr[i^1]) + ++ ((wolfssl_word)M[1]->z & wc_off_on_addr[i])), ++ M[2]->z); ++ if (err == MP_OKAY) ++ err = ecc_projective_dbl_point(M[2], M[3], a, modulus, mp); ++ /* copy M[2] back to M[i] */ ++ if (err == MP_OKAY) ++ err = mp_copy(M[2]->x, ++ (mp_int*) ++ ( ((wolfssl_word)M[0]->x & wc_off_on_addr[i^1]) + ++ ((wolfssl_word)M[1]->x & wc_off_on_addr[i])) ); ++ if (err == MP_OKAY) ++ err = mp_copy(M[2]->y, ++ (mp_int*) ++ ( ((wolfssl_word)M[0]->y & wc_off_on_addr[i^1]) + ++ ((wolfssl_word)M[1]->y & wc_off_on_addr[i])) ); ++ if (err == MP_OKAY) ++ err = mp_copy(M[2]->z, ++ (mp_int*) ++ ( ((wolfssl_word)M[0]->z & wc_off_on_addr[i^1]) + ++ ((wolfssl_word)M[1]->z & wc_off_on_addr[i])) ); ++#endif + if (err == MP_OKAY) + continue; + } diff --git a/package/libs/wolfssl/patches/900-remove-broken-autoconf-macros.patch b/package/libs/wolfssl/patches/900-remove-broken-autoconf-macros.patch index f7756b11c6..66582cfc46 100644 --- a/package/libs/wolfssl/patches/900-remove-broken-autoconf-macros.patch +++ b/package/libs/wolfssl/patches/900-remove-broken-autoconf-macros.patch @@ -1,7 +1,7 @@ --- a/configure.ac +++ b/configure.ac -@@ -4140,7 +4140,6 @@ AC_CONFIG_FILES([support/wolfssl.pc]) - AC_CONFIG_FILES([rpm/spec]) +@@ -4198,7 +4198,6 @@ AC_CONFIG_FILES([stamp-h], [echo timesta + AC_CONFIG_FILES([Makefile wolfssl/version.h wolfssl/options.h cyassl/options.h support/wolfssl.pc rpm/spec]) AX_CREATE_GENERIC_CONFIG -AX_AM_JOBSERVER([yes])