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Commit 64e69e8a authored by Chia-chi Yeh's avatar Chia-chi Yeh Committed by Mike Lockwood
Browse files

libdrm1: Use libcrypto instead of libaes. 

It seems that libdrm1 was the only user of libaes.
Now libaes is no longer required and removing it saves 36 kilobytes.
parent 3905eb3d

media/libdrm/mobile1/Android.mk

+8 −9
Original line number Diff line number Diff line
@@ -36,15 +36,15 @@ LOCAL_C_INCLUDES := \ 
    $(LOCAL_PATH)/include/objmng    \

    $(LOCAL_PATH)/include/parser    \

    $(LOCAL_PATH)/include/xml       \

    external/aes                     \

    external/openssl/include        \

    $(call include-path-for, system-core)/cutils



LOCAL_CFLAGS := $(LOCAL_DRM_CFLAG)



LOCAL_SHARED_LIBRARIES :=   \

	libaes                  \

    libutils                \

	libcutils

    libcutils               \

    libcrypto



LOCAL_MODULE := libdrm1
@@ -68,8 +68,7 @@ LOCAL_C_INCLUDES := \ 
    $(LOCAL_PATH)/include   \

    $(LOCAL_PATH)/include/parser \

    $(JNI_H_INCLUDE)    \

	$(call include-path-for, system-core)/cutils \

	external/aes

    $(call include-path-for, system-core)/cutils

	



LOCAL_SHARED_LIBRARIES := libdrm1 \

media/libdrm/mobile1/include/objmng/drm_rights_manager.h

+3 −3
Original line number Diff line number Diff line
@@ -21,9 +21,9 @@ 
extern "C" {

#endif



#include <openssl/aes.h>

#include <drm_common_types.h>

#include <parser_rel.h>

#include <aes.h>



#ifdef DRM_DEVICE_ARCH_ARM

#define ANDROID_DRM_CORE_PATH   "/data/drm/rights/"
@@ -141,12 +141,12 @@ void drm_discardPaddingByte(uint8_t *decryptedBuf, int32_t *decryptedBufLen); 
 *

 * \param Buffer    The buffer to decrypted and also used to save the output data.

 * \param BufferLen The length of the buffer data and also save the output data length.

 * \param ctx       The structure of the CEK.

 * \param key       The structure of the CEK.

 *

 * \return

 *      -0

 */

int32_t drm_aesDecBuffer(uint8_t * Buffer, int32_t * BufferLen, aes_decrypt_ctx ctx[1]);

int32_t drm_aesDecBuffer(uint8_t * Buffer, int32_t * BufferLen, AES_KEY *key);



/**

 * Update the DCF data length according the CEK.

media/libdrm/mobile1/src/objmng/drm_api.c

+5 −6
Original line number Diff line number Diff line
@@ -22,7 +22,6 @@ 
#include <drm_rights_manager.h>

#include <drm_time.h>

#include <drm_decoder.h>

#include <aes.h>

#include "log.h"



/**
@@ -1578,7 +1577,7 @@ static int32_t drm_readAesContent(T_DRM_Session_Node* s, int32_t offset, uint8_t 
    int32_t readBytes = 0;

    int32_t bufLen, piece, i, copyBytes, leftBytes;

    int32_t aesStart, mediaStart, mediaBufOff;

    aes_decrypt_ctx ctx[1];

    AES_KEY key;



    if (FALSE == drm_getKey(s->contentID, keyValue))

        return DRM_NO_RIGHTS;
@@ -1600,7 +1599,7 @@ static int32_t drm_readAesContent(T_DRM_Session_Node* s, int32_t offset, uint8_t 
        piece = (offset + readBytes - 1) / DRM_ONE_AES_BLOCK_LEN - offset / DRM_ONE_AES_BLOCK_LEN + 2;

        mediaStart = offset % DRM_ONE_AES_BLOCK_LEN;



        aes_decrypt_key128(keyValue, ctx);

        AES_set_decrypt_key(keyValue, DRM_KEY_LEN * 8, &key);

        mediaBufOff = 0;

        leftBytes = readBytes;
@@ -1608,7 +1607,7 @@ static int32_t drm_readAesContent(T_DRM_Session_Node* s, int32_t offset, uint8_t 
            memcpy(buf, s->rawContent + aesStart + i * DRM_ONE_AES_BLOCK_LEN, DRM_TWO_AES_BLOCK_LEN);

            bufLen = DRM_TWO_AES_BLOCK_LEN;



            if (drm_aesDecBuffer(buf, &bufLen, ctx) < 0)

            if (drm_aesDecBuffer(buf, &bufLen, &key) < 0)

                return DRM_MEDIA_DATA_INVALID;



            if (0 != i)
@@ -1651,7 +1650,7 @@ static int32_t drm_readAesContent(T_DRM_Session_Node* s, int32_t offset, uint8_t 
        piece = (offset + leftBytes - 1) / DRM_ONE_AES_BLOCK_LEN - offset / DRM_ONE_AES_BLOCK_LEN + 2;

        mediaBufOff = readBytes;



        aes_decrypt_key128(keyValue, ctx);

        AES_set_decrypt_key(keyValue, DRM_KEY_LEN * 8, &key);



        for (i = 0; i < piece - 1; i++) {

            if (-1 == (res = drm_readAesData(buf, s, aesStart, DRM_TWO_AES_BLOCK_LEN)))
@@ -1663,7 +1662,7 @@ static int32_t drm_readAesContent(T_DRM_Session_Node* s, int32_t offset, uint8_t 
            bufLen = DRM_TWO_AES_BLOCK_LEN;

            aesStart += DRM_ONE_AES_BLOCK_LEN;



            if (drm_aesDecBuffer(buf, &bufLen, ctx) < 0)

            if (drm_aesDecBuffer(buf, &bufLen, &key) < 0)

                return DRM_MEDIA_DATA_INVALID;



            drm_discardPaddingByte(buf, &bufLen);

media/libdrm/mobile1/src/objmng/drm_rights_manager.c

+7 −7
Original line number Diff line number Diff line
@@ -573,7 +573,7 @@ void drm_discardPaddingByte(uint8_t *decryptedBuf, int32_t *decryptedBufLen) 
    return;

}



int32_t drm_aesDecBuffer(uint8_t * Buffer, int32_t * BufferLen, aes_decrypt_ctx ctx[1])

int32_t drm_aesDecBuffer(uint8_t * Buffer, int32_t * BufferLen, AES_KEY *key)

{

    uint8_t dbuf[3 * DRM_ONE_AES_BLOCK_LEN], buf[DRM_ONE_AES_BLOCK_LEN];

    uint64_t i, len, wlen = DRM_ONE_AES_BLOCK_LEN, curLen, restLen;
@@ -596,7 +596,7 @@ int32_t drm_aesDecBuffer(uint8_t * Buffer, int32_t * BufferLen, aes_decrypt_ctx 
    if (len < 2 * DRM_ONE_AES_BLOCK_LEN) { /* The original file is less than one block in length */

        len -= DRM_ONE_AES_BLOCK_LEN;

        /* Decrypt from position len to position len + DRM_ONE_AES_BLOCK_LEN */

        aes_decrypt((dbuf + len), (dbuf + len), ctx);

        AES_decrypt((dbuf + len), (dbuf + len), key);



        /* Undo the CBC chaining */

        for (i = 0; i < len; ++i)
@@ -620,7 +620,7 @@ int32_t drm_aesDecBuffer(uint8_t * Buffer, int32_t * BufferLen, aes_decrypt_ctx 
            Buffer += len;



            /* Decrypt the b2 block */

            aes_decrypt((uint8_t *)b2, buf, ctx);

            AES_decrypt((uint8_t *)b2, buf, key);



            if (len == 0 || len == DRM_ONE_AES_BLOCK_LEN) { /* No ciphertext stealing */

                /* Unchain CBC using the previous ciphertext block in b1 */
@@ -639,7 +639,7 @@ int32_t drm_aesDecBuffer(uint8_t * Buffer, int32_t * BufferLen, aes_decrypt_ctx 
                    b3[i] = buf[i];



                /* Decrypt the C[N-1] block in b3 */

                aes_decrypt((uint8_t *)b3, (uint8_t *)b3, ctx);

                AES_decrypt((uint8_t *)b3, (uint8_t *)b3, key);



                /* Produce the last but one plaintext block by xoring with */

                /* The last but two ciphertext block */
@@ -669,15 +669,15 @@ int32_t drm_aesDecBuffer(uint8_t * Buffer, int32_t * BufferLen, aes_decrypt_ctx 


int32_t drm_updateDcfDataLen(uint8_t* pDcfLastData, uint8_t* keyValue, int32_t* moreBytes)

{

    aes_decrypt_ctx ctx[1];

    AES_KEY key;

    int32_t len = DRM_TWO_AES_BLOCK_LEN;



    if (NULL == pDcfLastData || NULL == keyValue)

        return FALSE;



    aes_decrypt_key128(keyValue, ctx);

    AES_set_decrypt_key(keyValue, DRM_KEY_LEN * 8, &key);



    if (drm_aesDecBuffer(pDcfLastData, &len, ctx) < 0)

    if (drm_aesDecBuffer(pDcfLastData, &len, &key) < 0)

        return FALSE;



    drm_discardPaddingByte(pDcfLastData, &len);