diff options
Diffstat (limited to 'src/libsec/port/des3ECB.c')
-rw-r--r-- | src/libsec/port/des3ECB.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/libsec/port/des3ECB.c b/src/libsec/port/des3ECB.c new file mode 100644 index 00000000..324254b1 --- /dev/null +++ b/src/libsec/port/des3ECB.c @@ -0,0 +1,48 @@ +#include "os.h" +#include <mp.h> +#include <libsec.h> + +// I wasn't sure what to do when the buffer was not +// a multiple of 8. I did what lacy's cryptolib did +// to be compatible, but it looks dangerous to me +// since its encrypting plain text with the key. -- presotto + +void +des3ECBencrypt(uchar *p, int len, DES3state *s) +{ + int i; + uchar tmp[8]; + + for(; len >= 8; len -= 8){ + triple_block_cipher(s->expanded, p, DES3EDE); + p += 8; + } + + if(len > 0){ + for (i=0; i<8; i++) + tmp[i] = i; + triple_block_cipher(s->expanded, tmp, DES3EDE); + for (i = 0; i < len; i++) + p[i] ^= tmp[i]; + } +} + +void +des3ECBdecrypt(uchar *p, int len, DES3state *s) +{ + int i; + uchar tmp[8]; + + for(; len >= 8; len -= 8){ + triple_block_cipher(s->expanded, p, DES3DED); + p += 8; + } + + if(len > 0){ + for (i=0; i<8; i++) + tmp[i] = i; + triple_block_cipher(s->expanded, tmp, DES3EDE); + for (i = 0; i < len; i++) + p[i] ^= tmp[i]; + } +} |