diff options
Diffstat (limited to 'openssl/crypto/modes/cts128.c')
| -rw-r--r-- | openssl/crypto/modes/cts128.c | 28 |
1 files changed, 8 insertions, 20 deletions
diff --git a/openssl/crypto/modes/cts128.c b/openssl/crypto/modes/cts128.c index c0e1f3696..2d583de6f 100644 --- a/openssl/crypto/modes/cts128.c +++ b/openssl/crypto/modes/cts128.c @@ -108,12 +108,8 @@ size_t CRYPTO_cts128_encrypt(const unsigned char *in, unsigned char *out, (*cbc)(in,out-16,residue,key,ivec,1); memcpy(out,tmp.c,residue); #else - { - size_t n; - for (n=0; n<16; n+=sizeof(size_t)) - *(size_t *)(tmp.c+n) = 0; + memset(tmp.c,0,sizeof(tmp)); memcpy(tmp.c,in,residue); - } memcpy(out,out-16,residue); (*cbc)(tmp.c,out-16,16,key,ivec,1); #endif @@ -144,12 +140,8 @@ size_t CRYPTO_nistcts128_encrypt(const unsigned char *in, unsigned char *out, #if defined(CBC_HANDLES_TRUNCATED_IO) (*cbc)(in,out-16+residue,residue,key,ivec,1); #else - { - size_t n; - for (n=0; n<16; n+=sizeof(size_t)) - *(size_t *)(tmp.c+n) = 0; + memset(tmp.c,0,sizeof(tmp)); memcpy(tmp.c,in,residue); - } (*cbc)(tmp.c,out-16+residue,16,key,ivec,1); #endif return len+residue; @@ -177,8 +169,7 @@ size_t CRYPTO_cts128_decrypt_block(const unsigned char *in, unsigned char *out, (*block)(in,tmp.c+16,key); - for (n=0; n<16; n+=sizeof(size_t)) - *(size_t *)(tmp.c+n) = *(size_t *)(tmp.c+16+n); + memcpy(tmp.c,tmp.c+16,16); memcpy(tmp.c,in+16,residue); (*block)(tmp.c,tmp.c,key); @@ -220,8 +211,7 @@ size_t CRYPTO_nistcts128_decrypt_block(const unsigned char *in, unsigned char *o (*block)(in+residue,tmp.c+16,key); - for (n=0; n<16; n+=sizeof(size_t)) - *(size_t *)(tmp.c+n) = *(size_t *)(tmp.c+16+n); + memcpy(tmp.c,tmp.c+16,16); memcpy(tmp.c,in,residue); (*block)(tmp.c,tmp.c,key); @@ -240,7 +230,7 @@ size_t CRYPTO_nistcts128_decrypt_block(const unsigned char *in, unsigned char *o size_t CRYPTO_cts128_decrypt(const unsigned char *in, unsigned char *out, size_t len, const void *key, unsigned char ivec[16], cbc128_f cbc) -{ size_t residue, n; +{ size_t residue; union { size_t align; unsigned char c[32]; } tmp; assert (in && out && key && ivec); @@ -257,8 +247,7 @@ size_t CRYPTO_cts128_decrypt(const unsigned char *in, unsigned char *out, out += len; } - for (n=16; n<32; n+=sizeof(size_t)) - *(size_t *)(tmp.c+n) = 0; + memset(tmp.c,0,sizeof(tmp)); /* this places in[16] at &tmp.c[16] and decrypted block at &tmp.c[0] */ (*cbc)(in,tmp.c,16,key,tmp.c+16,0); @@ -275,7 +264,7 @@ size_t CRYPTO_cts128_decrypt(const unsigned char *in, unsigned char *out, size_t CRYPTO_nistcts128_decrypt(const unsigned char *in, unsigned char *out, size_t len, const void *key, unsigned char ivec[16], cbc128_f cbc) -{ size_t residue, n; +{ size_t residue; union { size_t align; unsigned char c[32]; } tmp; assert (in && out && key && ivec); @@ -297,8 +286,7 @@ size_t CRYPTO_nistcts128_decrypt(const unsigned char *in, unsigned char *out, out += len; } - for (n=16; n<32; n+=sizeof(size_t)) - *(size_t *)(tmp.c+n) = 0; + memset(tmp.c,0,sizeof(tmp)); /* this places in[16] at &tmp.c[16] and decrypted block at &tmp.c[0] */ (*cbc)(in+residue,tmp.c,16,key,tmp.c+16,0); |