Wrapper functions for encryption

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04-23-2017
Naveen11@

Wrapper functions for encryption

I have executed the blowfish algorithm and my output for string is

Code:

Encrypting string(12): technologies (0) ENC_DUMP: t->0x9BB46254476C, e->0x1C458C4D7E5D5 (2) ENC_DUMP: c->0x1733846EEDDF5, h->0x122165497E762 (4) ENC_DUMP: n->0x1CECA6B5E3D0F, o->0x10F4CC1EAAA7B (6) ENC_DUMP: l->0x1A0D58AB2FF79, o->0x107FF53CA917B (8) ENC_DUMP: g->0xEB7B0435136F, i->0x137C5A85CC93B (10) ENC_DUMP: e->0x32B9EAADF385, s->0xC4AD7059D8DB Decrypted string: technologies

but when i use the password how can i do it.I read the article here
https://cboard.cprogramming.com/c-pr...tml#post779007

Here they said that for using of password we have to create the wrapper.I don't know what it is can anyone can have the idea of how to create the wrapper for password and how to use it.

I need the crypt_blowfish model encryption.
04-24-2017
Salem

Referring to your previous thread.
https://cboard.cprogramming.com/c-pr...ers-error.html

> /* you could replace this with a new key of course */
> Blowfish_Init (&ctx, (unsigned char*)"TESTKEY", 7);

> Here they said that for using of password we have to create the wrapper.
Well if you made the password argv[2] in your program, you would have your wrapper.
04-24-2017
Naveen11@

> /* you could replace this with a new key of course */
> Blowfish_Init (&ctx, (unsigned char*)"TESTKEY", 7);

In these is there we can use any range of length or their is any restriction in their range and also we can use string only or use any special characters.
Blowfish_Init (&ctx, (unsigned char*)"Kn0wed&e1s^0wER", 7);

> Here they said that for using of password we have to create the wrapper.
Well if you made the password argv[2] in your program, you would have your wrapper.[/QUOTE]

When i change the argv[2] as you said i end up with an error like.can you explain me fully.

Code:

(gdb) run naveenraj Starting program: /home/niche-0043/Downloads/bfsh-sch/a.out naveenraj Encrypting string(9): (null) Program received signal SIGSEGV, Segmentation fault. 0x0000000000400d00 in main (argc=2, argv=0x7fffffffdeb8) at blow.c:528 528 enc[i] = str[i];
04-24-2017
Salem

> (gdb) run naveenraj
One presumes that one is smart enough to pass TWO arguments to a program when TWO arguments are expected.

Or at least change the number of expected arguments check at the beginning of the program to defend against user error.

> Blowfish_Init (&ctx, (unsigned char*)"Kn0wed&e1s^0wER", 7);
What do you think the 7 actually represented in the first example?
- The number of days in a week.
- The number of faces on a cube, +1
- The length of the edge of a chess board, -1
- The length of the key string.
04-24-2017
Naveen11@

Quote:

Originally Posted by Salem

> (gdb) run naveenraj
One presumes that one is smart enough to pass TWO arguments to a program when TWO arguments are expected.

Or at least change the number of expected arguments check at the beginning of the program to defend against user error.

> Blowfish_Init (&ctx, (unsigned char*)"Kn0wed&e1s^0wER", 7);
What do you think the 7 actually represented in the first example?
- The number of days in a week.
- The number of faces on a cube, +1
- The length of the edge of a chess board, -1
- The length of the key string.

Actually i forgot to change the key length

Code:

Blowfish_Init (&ctx, (unsigned char*)"Kn0wed&e1s^0wER", 15);

Code:

Reading symbols from ./a.out...done. (gdb) run technology Starting program: /home/niche-0043/Downloads/bfsh-sch/a.out technology Encrypting string(10): (null) Program received signal SIGSEGV, Segmentation fault. 0x0000000000400d00 in main (argc=2, argv=0x7fffffffdeb8) at blow.c:528 528 enc[i] = str[i]; (gdb)