Re: Decryption and encryption of packet using openssl command line
hmmmtough to imagine but no body seems to know it or it might be to simple.On 12/9/05, Riaz Farnaz [EMAIL PROTECTED]
wrote:Hi,I have a query about how to use the openssl command line to decrypt and encrypt my packet. Below is an ipsec encrypted packet which i decrypt and print on the console. When I try to do the same with openssl command line it gives a different value
Before decryption (below is a complete packet which I have split for understandability)START: 4500 0060 9f80 4000 8032 d65e c0a8 01a2 [EMAIL PROTECTED]
0010: c0a8 019a --- IP Packet 9e40 cf04 0002 --- SPI and Sequence number
9971 4c73 [EMAIL PROTECTED]0020: 7842 49c1 --- IV 7b13 3576 8c17 21c8 65a9 8d00 xBI.{.5v..!.e...
0030: 1e99 1b74 3e86 6476 07e7 f8e8 04f0 0e5d ...t.dv...]0040: 8d63 41d9 cdb0 1304 c800 0b6e bfbb c069 .cAn...i0050: e594 b4d5 ---
Encrypted packet b330 d80f 84cc 0106 57b8 0eaf .0..W... -- Authentication data
ENDAfter DecryptionSTART
IP_PACKET not shown: 9e40 cf04 0002 --- SPI and sequence number 9971 4c73 7842 49c1 [EMAIL PROTECTED] ---
IVSTART OF DECRYPTED PACKET0010: 0def 01bb a8cc c11d d59f 3997 5019 faf0 ..9.P...0020: 7452 1503 0100 1228 ce83 baef 8a8b tR...(..
0030: b4e9 a6b8 03b5 8392 da04 3a 01 0203 0306 ..:. --- padding, pad length and next header field
END OF DECRYPTED PACKET0040: b330 d80f 84cc 0106 57b8 0eaf .0..W... ---Authentication data
END: cbcc d7dc c448 fd53 4dce d67f d2c3 6fe0 .H.SM.o.0010: 5838 0444 --
Cipher keyThe command that I am using for decryption of the packet is -- openssl enc -des3 -in input_pkt -out out_pkt -nopad -d -K 7de79edfe7046acd223f6a72b6bb354c4a6888f672d61cbb -iv 43990d51bba59ece
The input packet I am passing as an array in a c file and printing the ascii into a file name input_packet. Below is the code for it#include stdio.h#include sys/types.h#include sys/stat.h
#include fcntl.h#include stdlib.hint main(){ unsigned char in_packet[]={ 0x7b,0x13, 0x35,0x76, 0x8c,0x17, 0x21,0xc8, 0x65,0xa9, 0x8d,0x00, 0x1e,0x99, 0x1b,0x74, 0x3e,0x86, 0x64,0x76, 0x07,0xe7, 0xf8,0xe8, 0x04,0xf0, 0x0e,0x5d, 0x8d,0x63, 0x41,0xd9, 0xcd,0xd0, 0x13,0x04, 0xc8,0x00, 0x0b,0x6e, 0xbf,0xbb, 0xc0,0x69, 0xe5,0x94, 0xb4, 0xd5};
unsigned int i=0; FILE *fd_d; fd_d = fopen(input_pkt,r+); printf(sizeof in_packet is : %d\n,sizeof(in_packet)); if(fd_d == NULL) {
printf(fd not created\n); return 1; } while(i (sizeof(in_packet))) { fprintf(fd_d,%c,in_packet[i]); printf(%x,in_packet[i]);
i++; } printf(\nvalue of i is %d\n,i); fclose(fd_d); return 0;}Can any one help me out. the packet after decryption should look like the above. I think many of you might have used this functionality and it shouldn't a difficult thing for you folks to answer.
Thanks a lot in advance.
Decryption and encryption of packet using openssl command line
Hi,I have a query about how to use the openssl command line to decrypt and encrypt my packet. Below is an ipsec encrypted packet which i decrypt and print on the console. When I try to do the same with openssl command line it gives a different value
Before decryption (below is a complete packet which I have split for understandability)START: 4500 0060 9f80 4000 8032 d65e c0a8 01a2 [EMAIL PROTECTED]
0010: c0a8 019a --- IP Packet 9e40 cf04 0002 --- SPI and Sequence number
9971 4c73 [EMAIL PROTECTED]0020: 7842 49c1 --- IV 7b13 3576 8c17 21c8 65a9 8d00 xBI.{.5v..!.e...
0030: 1e99 1b74 3e86 6476 07e7 f8e8 04f0 0e5d ...t.dv...]0040: 8d63 41d9 cdb0 1304 c800 0b6e bfbb c069 .cAn...i0050: e594 b4d5 ---
Encrypted packet b330 d80f 84cc 0106 57b8 0eaf .0..W... -- Authentication data
ENDAfter DecryptionSTART
IP_PACKET not shown: 9e40 cf04 0002 --- SPI and sequence number 9971 4c73 7842 49c1 [EMAIL PROTECTED] ---
IVSTART OF DECRYPTED PACKET0010: 0def 01bb a8cc c11d d59f 3997 5019 faf0 ..9.P...0020: 7452 1503 0100 1228 ce83 baef 8a8b tR...(..
0030: b4e9 a6b8 03b5 8392 da04 3a 01 0203 0306 ..:. --- padding, pad length and next header field
END OF DECRYPTED PACKET0040: b330 d80f 84cc 0106 57b8 0eaf .0..W... ---Authentication data
END: cbcc d7dc c448 fd53 4dce d67f d2c3 6fe0 .H.SM.o.0010: 5838 0444 --
Cipher keyThe command that I am using for decryption of the packet is -- openssl enc -des3 -in input_pkt -out out_pkt -nopad -d -K 7de79edfe7046acd223f6a72b6bb354c4a6888f672d61cbb -iv 43990d51bba59ece
The input packet I am passing as an array in a c file and printing the ascii into a file name input_packet. Below is the code for it#include stdio.h#include sys/types.h#include sys/stat.h
#include fcntl.h#include stdlib.hint main(){ unsigned char in_packet[]={ 0x7b,0x13, 0x35,0x76, 0x8c,0x17, 0x21,0xc8, 0x65,0xa9, 0x8d,0x00, 0x1e,0x99, 0x1b,0x74, 0x3e,0x86, 0x64,0x76, 0x07,0xe7, 0xf8,0xe8, 0x04,0xf0, 0x0e,0x5d, 0x8d,0x63, 0x41,0xd9, 0xcd,0xd0, 0x13,0x04, 0xc8,0x00, 0x0b,0x6e, 0xbf,0xbb, 0xc0,0x69, 0xe5,0x94, 0xb4, 0xd5};
unsigned int i=0; FILE *fd_d; fd_d = fopen(input_pkt,r+); printf(sizeof in_packet is : %d\n,sizeof(in_packet)); if(fd_d == NULL) {
printf(fd not created\n); return 1; } while(i (sizeof(in_packet))) { fprintf(fd_d,%c,in_packet[i]); printf(%x,in_packet[i]);
i++; } printf(\nvalue of i is %d\n,i); fclose(fd_d); return 0;}Can any one help me out. the packet after decryption should look like the above. I think many of you might have used this functionality and it shouldn't a difficult thing for you folks to answer.
Thanks a lot in advance.
