OCTET_STRING_t -> NSString?
OCTET_STRING_t -> NSString?
- Subject: OCTET_STRING_t -> NSString?
- From: Todd Heberlein <email@hidden>
- Date: Tue, 29 Mar 2011 10:24:13 -0700
I'm working my way through Apple's "Validating App Store Receipts", and I can extract all the data, compute the digest and compare it against the hash. But now I am stuck converting the OCTET_STRING_t for the bundle_id in the Receipt to an NSString so I can compare it against my applications Bundle Identifier.
In particular, the beginning of the OCTET_STRING_t's buffer begins with two bytes (decimal values 12 and 21). Am I supposed to skip these? For example, the following code where I skip these first two bytes seems to work, but it seems like a big hack:
OCTET_STRING_t *bundle_id;
...
NSString *string = [[NSString alloc] initWithBytes:(bundle_id->buf + 2)
length:(NSUInteger)(bundle_id->size - 2)
encoding:NSUTF8StringEncoding];
What is the right way?
Thanks,
Todd
PS. Here is the OCTET_STRING_t's buffer for the sample receipt Apple provides. One line for each byte. The number is the decimal value for each byte, and the corresponding character (if printable) is in the brackets.
12 [ ]
21 [ ]
99 [c]
111 [o]
109 [m]
46 [.]
101 [e]
120 [x]
97 [a]
109 [m]
112 [p]
108 [l]
101 [e]
46 [.]
83 [S]
97 [a]
109 [m]
112 [p]
108 [l]
101 [e]
65 [A]
112 [p]
112 [p]
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden