5 files changed, 11 insertions, 625 deletions

diff --git a/twmincrypt/Android.mk b/twmincrypt/Android.mk
new file mode 100644
index 000000000..0e1fbfd9a
--- /dev/null
+++ b/twmincrypt/Android.mk
@@ -0,0 +1,11 @@
+# This provides a rule to make libmincrypt as a shared library.
+# As a static library, zip signature verification was crashing.
+# Making it as a shared library seems to fix that issue.
+
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS:= eng
+LOCAL_MODULE := libmincrypt
+LOCAL_SRC_FILES := ../../../system/core/libmincrypt/rsa.c ../../../system/core/libmincrypt/sha.c
+include $(BUILD_SHARED_LIBRARY)
diff --git a/twmincrypt/twrsa.c b/twmincrypt/twrsa.c
deleted file mode 100644
index 52d6bfbc2..000000000
--- a/twmincrypt/twrsa.c
+++ /dev/null
@@ -1,199 +0,0 @@
-/* rsa.c
-**
-** Copyright 2008, The Android Open Source Project
-**
-** Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are met:
-**     * Redistributions of source code must retain the above copyright
-**       notice, this list of conditions and the following disclaimer.
-**     * Redistributions in binary form must reproduce the above copyright
-**       notice, this list of conditions and the following disclaimer in the
-**       documentation and/or other materials provided with the distribution.
-**     * Neither the name of Google Inc. nor the names of its contributors may
-**       be used to endorse or promote products derived from this software
-**       without specific prior written permission.
-**
-** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR 
-** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 
-** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
-** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
-** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
-** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#include "twrsa.h"
-#include "twsha.h"
-#include "common.h"
-
-/* a[] -= mod */
-static void subM(const RSAPublicKey *key, uint32_t *a) {
-    int64_t A = 0;
-    int i;
-    for (i = 0; i < key->len; ++i) {
-        A += (uint64_t)a[i] - key->n[i];
-        a[i] = (uint32_t)A;
-        A >>= 32;
-    }
-}
-
-/* return a[] >= mod */
-static int geM(const RSAPublicKey *key, const uint32_t *a) {
-    int i;
-    for (i = key->len; i;) {
-        --i;
-        if (a[i] < key->n[i]) return 0;
-        if (a[i] > key->n[i]) return 1;
-    }
-    return 1;  /* equal */
-}
-
-/* montgomery c[] += a * b[] / R % mod */
-static void montMulAdd(const RSAPublicKey *key,
-                       uint32_t* c,
-                       const uint32_t a,
-                       const uint32_t* b) {
-    uint64_t A = (uint64_t)a * b[0] + c[0];
-    uint32_t d0 = (uint32_t)A * key->n0inv;
-    uint64_t B = (uint64_t)d0 * key->n[0] + (uint32_t)A;
-    int i;
-
-    for (i = 1; i < key->len; ++i) {
-        A = (A >> 32) + (uint64_t)a * b[i] + c[i];
-        B = (B >> 32) + (uint64_t)d0 * key->n[i] + (uint32_t)A;
-        c[i - 1] = (uint32_t)B;
-    }
-
-    A = (A >> 32) + (B >> 32);
-
-    c[i - 1] = (uint32_t)A;
-
-    if (A >> 32) {
-        subM(key, c);
-    }
-}
-
-/* montgomery c[] = a[] * b[] / R % mod */
-static void montMul(const RSAPublicKey *key,
-                    uint32_t* c,
-                    const uint32_t* a,
-                    const uint32_t* b) {
-    int i;
-    for (i = 0; i < key->len; ++i) {
-        c[i] = 0;
-    }
-    for (i = 0; i < key->len; ++i) {
-        montMulAdd(key, c, a[i], b);
-    }
-}
-
-/* In-place public exponentiation.
-** Input and output big-endian byte array in inout.
-*/
-static void modpow3(const RSAPublicKey *key,
-                    uint8_t* inout) {
-    uint32_t a[RSANUMWORDS];
-    uint32_t aR[RSANUMWORDS];
-    uint32_t aaR[RSANUMWORDS];
-    uint32_t *aaa = aR;  /* Re-use location. */
-    int i;
-
-    /* Convert from big endian byte array to little endian word array. */
-    for (i = 0; i < key->len; ++i) {
-        uint32_t tmp =
-            (inout[((key->len - 1 - i) * 4) + 0] << 24) |
-            (inout[((key->len - 1 - i) * 4) + 1] << 16) |
-            (inout[((key->len - 1 - i) * 4) + 2] << 8) |
-            (inout[((key->len - 1 - i) * 4) + 3] << 0);
-        a[i] = tmp;
-    }
-
-    montMul(key, aR, a, key->rr);  /* aR = a * RR / R mod M   */
-    montMul(key, aaR, aR, aR);     /* aaR = aR * aR / R mod M */
-    montMul(key, aaa, aaR, a);     /* aaa = aaR * a / R mod M */
-
-    /* Make sure aaa < mod; aaa is at most 1x mod too large. */
-    if (geM(key, aaa)) {
-        subM(key, aaa);
-    }
-
-    /* Convert to bigendian byte array */
-    for (i = key->len - 1; i >= 0; --i) {
-        uint32_t tmp = aaa[i];
-        *inout++ = tmp >> 24;
-        *inout++ = tmp >> 16;
-        *inout++ = tmp >> 8;
-        *inout++ = tmp >> 0;
-    }
-}
-
-/* Expected PKCS1.5 signature padding bytes, for a keytool RSA signature.
-** Has the 0-length optional parameter encoded in the ASN1 (as opposed to the
-** other flavor which omits the optional parameter entirely). This code does not
-** accept signatures without the optional parameter.
-*/
-static const uint8_t padding[RSANUMBYTES - SHA_DIGEST_SIZE] = {
-    0x00,0x01,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
-    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00,
-    0x30,0x21,0x30,0x09,0x06,0x05,0x2b,0x0e,0x03,0x02,0x1a,0x05,0x00,
-    0x04,0x14
-};
-
-/* Verify a 2048 bit RSA PKCS1.5 signature against an expected SHA-1 hash.
-** Returns 0 on failure, 1 on success.
-*/
-int RSA_verify(const RSAPublicKey *key,
-               const uint8_t *signature,
-               const int len,
-               const uint8_t *sha) {
-    uint8_t buf[RSANUMBYTES];
-    int i;
-
-    if (key->len != RSANUMWORDS) {
-        return 0;  /* Wrong key passed in. */
-    }
-
-    if (len != sizeof(buf)) {
-        return 0;  /* Wrong input length. */
-    }
-
-    for (i = 0; i < len; ++i) {
-        buf[i] = signature[i];
-    }
-
-    modpow3(key, buf);
-
-    /* Check pkcs1.5 padding bytes. */
-    for (i = 0; i < (int) sizeof(padding); ++i) {
-        if (buf[i] != padding[i]) {
-            return 0;
-        }
-    }
-
-    /* Check sha digest matches. */
-    for (; i < len; ++i) {
-        if (buf[i] != *sha++) {
-            return 0;
-        }
-    }
-
-    return 1;
-}
diff --git a/twmincrypt/twrsa.h b/twmincrypt/twrsa.h
deleted file mode 100644
index 7d7d57158..000000000
--- a/twmincrypt/twrsa.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/* rsa.h
-**
-** Copyright 2008, The Android Open Source Project
-**
-** Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are met:
-**     * Redistributions of source code must retain the above copyright
-**       notice, this list of conditions and the following disclaimer.
-**     * Redistributions in binary form must reproduce the above copyright
-**       notice, this list of conditions and the following disclaimer in the
-**       documentation and/or other materials provided with the distribution.
-**     * Neither the name of Google Inc. nor the names of its contributors may
-**       be used to endorse or promote products derived from this software
-**       without specific prior written permission.
-**
-** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR 
-** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 
-** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
-** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
-** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
-** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#ifndef _EMBEDDED_RSA_H_
-#define _EMBEDDED_RSA_H_
-
-#include <inttypes.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define RSANUMBYTES 256           /* 2048 bit key length */
-#define RSANUMWORDS (RSANUMBYTES / sizeof(uint32_t))
-
-typedef struct RSAPublicKey {
-    int len;                  /* Length of n[] in number of uint32_t */
-    uint32_t n0inv;           /* -1 / n[0] mod 2^32 */
-    uint32_t n[RSANUMWORDS];  /* modulus as little endian array */
-    uint32_t rr[RSANUMWORDS]; /* R^2 as little endian array */
-} RSAPublicKey;
-
-int RSA_verify(const RSAPublicKey *key,
-               const uint8_t* signature,
-               const int len,
-               const uint8_t* sha);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/twmincrypt/twsha.c b/twmincrypt/twsha.c
deleted file mode 100644
index ac712c245..000000000
--- a/twmincrypt/twsha.c
+++ /dev/null
@@ -1,307 +0,0 @@
-/* sha.c
-**
-** Copyright 2008, The Android Open Source Project
-**
-** Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are met:
-**     * Redistributions of source code must retain the above copyright
-**       notice, this list of conditions and the following disclaimer.
-**     * Redistributions in binary form must reproduce the above copyright
-**       notice, this list of conditions and the following disclaimer in the
-**       documentation and/or other materials provided with the distribution.
-**     * Neither the name of Google Inc. nor the names of its contributors may
-**       be used to endorse or promote products derived from this software
-**       without specific prior written permission.
-**
-** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR
-** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
-** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#include "twsha.h"
-
-// Some machines lack byteswap.h and endian.h.  These have to use the
-// slower code, even if they're little-endian.
-
-#if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
-
-#include <byteswap.h>
-#include <memory.h>
-
-// This version is about 28% faster than the generic version below,
-// but assumes little-endianness.
-
-static inline uint32_t ror27(uint32_t val) {
-    return (val >> 27) | (val << 5);
-}
-static inline uint32_t ror2(uint32_t val) {
-    return (val >> 2) | (val << 30);
-}
-static inline uint32_t ror31(uint32_t val) {
-    return (val >> 31) | (val << 1);
-}
-
-static void SHA1_Transform(SHA_CTX* ctx) {
-    uint32_t W[80];
-    register uint32_t A, B, C, D, E;
-    int t;
-
-    A = ctx->state[0];
-    B = ctx->state[1];
-    C = ctx->state[2];
-    D = ctx->state[3];
-    E = ctx->state[4];
-
-#define SHA_F1(A,B,C,D,E,t)                     \
-    E += ror27(A) +                             \
-        (W[t] = bswap_32(ctx->buf.w[t])) +      \
-        (D^(B&(C^D))) + 0x5A827999;             \
-    B = ror2(B);
-
-    for (t = 0; t < 15; t += 5) {
-        SHA_F1(A,B,C,D,E,t + 0);
-        SHA_F1(E,A,B,C,D,t + 1);
-        SHA_F1(D,E,A,B,C,t + 2);
-        SHA_F1(C,D,E,A,B,t + 3);
-        SHA_F1(B,C,D,E,A,t + 4);
-    }
-    SHA_F1(A,B,C,D,E,t + 0);  // 16th one, t == 15
-
-#undef SHA_F1
-
-#define SHA_F1(A,B,C,D,E,t)                                     \
-    E += ror27(A) +                                             \
-        (W[t] = ror31(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16])) +   \
-        (D^(B&(C^D))) + 0x5A827999;                             \
-    B = ror2(B);
-
-    SHA_F1(E,A,B,C,D,t + 1);
-    SHA_F1(D,E,A,B,C,t + 2);
-    SHA_F1(C,D,E,A,B,t + 3);
-    SHA_F1(B,C,D,E,A,t + 4);
-
-#undef SHA_F1
-
-#define SHA_F2(A,B,C,D,E,t)                                     \
-    E += ror27(A) +                                             \
-        (W[t] = ror31(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16])) +   \
-        (B^C^D) + 0x6ED9EBA1;                                   \
-    B = ror2(B);
-
-    for (t = 20; t < 40; t += 5) {
-        SHA_F2(A,B,C,D,E,t + 0);
-        SHA_F2(E,A,B,C,D,t + 1);
-        SHA_F2(D,E,A,B,C,t + 2);
-        SHA_F2(C,D,E,A,B,t + 3);
-        SHA_F2(B,C,D,E,A,t + 4);
-    }
-
-#undef SHA_F2
-
-#define SHA_F3(A,B,C,D,E,t)                                     \
-    E += ror27(A) +                                             \
-        (W[t] = ror31(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16])) +   \
-        ((B&C)|(D&(B|C))) + 0x8F1BBCDC;                         \
-    B = ror2(B);
-
-    for (; t < 60; t += 5) {
-        SHA_F3(A,B,C,D,E,t + 0);
-        SHA_F3(E,A,B,C,D,t + 1);
-        SHA_F3(D,E,A,B,C,t + 2);
-        SHA_F3(C,D,E,A,B,t + 3);
-        SHA_F3(B,C,D,E,A,t + 4);
-    }
-
-#undef SHA_F3
-
-#define SHA_F4(A,B,C,D,E,t)                                     \
-    E += ror27(A) +                                             \
-        (W[t] = ror31(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16])) +   \
-        (B^C^D) + 0xCA62C1D6;                                   \
-    B = ror2(B);
-
-    for (; t < 80; t += 5) {
-        SHA_F4(A,B,C,D,E,t + 0);
-        SHA_F4(E,A,B,C,D,t + 1);
-        SHA_F4(D,E,A,B,C,t + 2);
-        SHA_F4(C,D,E,A,B,t + 3);
-        SHA_F4(B,C,D,E,A,t + 4);
-    }
-
-#undef SHA_F4
-
-    ctx->state[0] += A;
-    ctx->state[1] += B;
-    ctx->state[2] += C;
-    ctx->state[3] += D;
-    ctx->state[4] += E;
-}
-
-void SHA_update(SHA_CTX* ctx, const void* data, int len) {
-    int i = ctx->count % sizeof(ctx->buf);
-    const uint8_t* p = (const uint8_t*)data;
-
-    ctx->count += len;
-
-    while (len > sizeof(ctx->buf) - i) {
-        memcpy(&ctx->buf.b[i], p, sizeof(ctx->buf) - i);
-        len -= sizeof(ctx->buf) - i;
-        p += sizeof(ctx->buf) - i;
-        SHA1_Transform(ctx);
-        i = 0;
-    }
-
-    while (len--) {
-        ctx->buf.b[i++] = *p++;
-        if (i == sizeof(ctx->buf)) {
-            SHA1_Transform(ctx);
-            i = 0;
-        }
-    }
-}
-
-
-const uint8_t* SHA_final(SHA_CTX* ctx) {
-    uint64_t cnt = ctx->count * 8;
-    int i;
-
-    SHA_update(ctx, (uint8_t*)"\x80", 1);
-    while ((ctx->count % sizeof(ctx->buf)) != (sizeof(ctx->buf) - 8)) {
-        SHA_update(ctx, (uint8_t*)"\0", 1);
-    }
-    for (i = 0; i < 8; ++i) {
-        uint8_t tmp = cnt >> ((7 - i) * 8);
-        SHA_update(ctx, &tmp, 1);
-    }
-
-    for (i = 0; i < 5; i++) {
-        ctx->buf.w[i] = bswap_32(ctx->state[i]);
-    }
-
-    return ctx->buf.b;
-}
-
-#else   // #if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
-
-#define rol(bits, value) (((value) << (bits)) | ((value) >> (32 - (bits))))
-
-static void SHA1_transform(SHA_CTX *ctx) {
-    uint32_t W[80];
-    uint32_t A, B, C, D, E;
-    uint8_t *p = ctx->buf;
-    int t;
-
-    for(t = 0; t < 16; ++t) {
-        uint32_t tmp =  *p++ << 24;
-        tmp |= *p++ << 16;
-        tmp |= *p++ << 8;
-        tmp |= *p++;
-        W[t] = tmp;
-    }
-
-    for(; t < 80; t++) {
-        W[t] = rol(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
-    }
-
-    A = ctx->state[0];
-    B = ctx->state[1];
-    C = ctx->state[2];
-    D = ctx->state[3];
-    E = ctx->state[4];
-
-    for(t = 0; t < 80; t++) {
-        uint32_t tmp = rol(5,A) + E + W[t];
-
-        if (t < 20)
-            tmp += (D^(B&(C^D))) + 0x5A827999;
-        else if ( t < 40)
-            tmp += (B^C^D) + 0x6ED9EBA1;
-        else if ( t < 60)
-            tmp += ((B&C)|(D&(B|C))) + 0x8F1BBCDC;
-        else
-            tmp += (B^C^D) + 0xCA62C1D6;
-
-        E = D;
-        D = C;
-        C = rol(30,B);
-        B = A;
-        A = tmp;
-    }
-
-    ctx->state[0] += A;
-    ctx->state[1] += B;
-    ctx->state[2] += C;
-    ctx->state[3] += D;
-    ctx->state[4] += E;
-}
-
-void SHA_update(SHA_CTX *ctx, const void *data, int len) {
-    int i = ctx->count % sizeof(ctx->buf);
-    const uint8_t* p = (const uint8_t*)data;
-
-    ctx->count += len;
-
-    while (len--) {
-        ctx->buf[i++] = *p++;
-        if (i == sizeof(ctx->buf)) {
-            SHA1_transform(ctx);
-            i = 0;
-        }
-    }
-}
-const uint8_t *SHA_final(SHA_CTX *ctx) {
-    uint8_t *p = ctx->buf;
-    uint64_t cnt = ctx->count * 8;
-    int i;
-
-    SHA_update(ctx, (uint8_t*)"\x80", 1);
-    while ((ctx->count % sizeof(ctx->buf)) != (sizeof(ctx->buf) - 8)) {
-        SHA_update(ctx, (uint8_t*)"\0", 1);
-    }
-    for (i = 0; i < 8; ++i) {
-        uint8_t tmp = cnt >> ((7 - i) * 8);
-        SHA_update(ctx, &tmp, 1);
-    }
-
-    for (i = 0; i < 5; i++) {
-        uint32_t tmp = ctx->state[i];
-        *p++ = tmp >> 24;
-        *p++ = tmp >> 16;
-        *p++ = tmp >> 8;
-        *p++ = tmp >> 0;
-    }
-
-    return ctx->buf;
-}
-
-#endif // endianness
-
-void SHA_init(SHA_CTX* ctx) {
-    ctx->state[0] = 0x67452301;
-    ctx->state[1] = 0xEFCDAB89;
-    ctx->state[2] = 0x98BADCFE;
-    ctx->state[3] = 0x10325476;
-    ctx->state[4] = 0xC3D2E1F0;
-    ctx->count = 0;
-}
-
-/* Convenience function */
-const uint8_t* SHA(const void *data, int len, uint8_t *digest) {
-    const uint8_t *p;
-    int i;
-    SHA_CTX ctx;
-    SHA_init(&ctx);
-    SHA_update(&ctx, data, len);
-    p = SHA_final(&ctx);
-    for (i = 0; i < SHA_DIGEST_SIZE; ++i) {
-        digest[i] = *p++;
-    }
-    return digest;
-}
diff --git a/twmincrypt/twsha.h b/twmincrypt/twsha.h
deleted file mode 100644
index af63e8775..000000000
--- a/twmincrypt/twsha.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/* sha.h
-**
-** Copyright 2008, The Android Open Source Project
-**
-** Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are met:
-**     * Redistributions of source code must retain the above copyright
-**       notice, this list of conditions and the following disclaimer.
-**     * Redistributions in binary form must reproduce the above copyright
-**       notice, this list of conditions and the following disclaimer in the
-**       documentation and/or other materials provided with the distribution.
-**     * Neither the name of Google Inc. nor the names of its contributors may
-**       be used to endorse or promote products derived from this software
-**       without specific prior written permission.
-**
-** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR
-** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
-** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#ifndef _EMBEDDED_SHA_H_
-#define _EMBEDDED_SHA_H_
-
-#include <inttypes.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef struct SHA_CTX {
-    uint64_t count;
-    uint32_t state[5];
-#if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
-    union {
-        uint8_t b[64];
-        uint32_t w[16];
-    } buf;
-#else
-    uint8_t buf[64];
-#endif
-} SHA_CTX;
-
-void SHA_init(SHA_CTX* ctx);
-void SHA_update(SHA_CTX* ctx, const void* data, int len);
-const uint8_t* SHA_final(SHA_CTX* ctx);
-
-/* Convenience method. Returns digest parameter value. */
-const uint8_t* SHA(const void* data, int len, uint8_t* digest);
-
-#define SHA_DIGEST_SIZE 20
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif