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Refactor AES context to be shallow-copyable

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Replace RK pointer in AES context with a buffer offset, to allow
shallow copying. Fixes #2147.

Signed-off-by: Werner Lewis <werner.lewis@arm.com>
This commit is contained in:
Werner Lewis
2022-05-30 12:00:21 +01:00
committed by Werner Lewis
parent 07040bb179
commit dd76ef359d
7 changed files with 50 additions and 15 deletions
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4
library/padlock.c
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@@ -82,7 +82,7 @@ int mbedtls_padlock_xcryptecb( mbedtls_aes_context *ctx,
uint32_t *ctrl;
unsigned char buf[256];
rk = ctx->rk;
rk = ctx->buf + ctx->rk_offset;
blk = MBEDTLS_PADLOCK_ALIGN16( buf );
memcpy( blk, input, 16 );
@@ -129,7 +129,7 @@ int mbedtls_padlock_xcryptcbc( mbedtls_aes_context *ctx,
( (long) output & 15 ) != 0 )
return( MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED );
rk = ctx->rk;
rk = ctx->buf + ctx->rk_offset;
iw = MBEDTLS_PADLOCK_ALIGN16( buf );
memcpy( iw, iv, 16 );