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Review
"If you have struggled with OpenSSL and the supplied documentation then you will regret the amount of time that you have wasted before finding this book. If you are planning to use OpenSSL then you need to buy a copy - it's essential reading. What is more surprising is that even if you don't plan to use OpenSSL, then downloading it and trying out the examples in the book could be the education in practical cryptography you really need. What more can I say of any book, other than that I certainly won't be lending it to anyone else? It's going to remain firmly chained to my bookshelf for the foreseeable future - and no, you can't borrow it." - Mike James, VSJ, October 2003
Gregory V. Wilson, Dr. Dobbs Journal, Feb 2003
a good introduction and a useful reference guide.
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Most Helpful Customer Reviews
30 of 30 people found the following review helpful
Format:Paperback
This is the book I needed when I started developing code using OpenSSL. As it was, I struggled through using the ropey
on-line docs, combing the web for examples, and reading the source code for the "openssl" utility to try and work out how
to use it.
on-line docs, combing the web for examples, and reading the source code for the "openssl" utility to try and work out how
to use it.
When trying to come to grips with the OpenSSL toolkit, I searched in vain for something that provides a
simple explanation of how everything fits together. I've now come to the conclusion that there's no such thing as a simple
explanation - the subject is big enough that you just have to learn quite a lot before you can use it. But, this book comes
as close as I think you could hope for.
If you're using OpenSSL, you *need* this book, it's got information on cryptography, the OpenSSL API, the toolkit,
as well as candid comments about its strengths and weaknesses.
The book doesn't cover the SSL protocol: if you need that then I'd recommend the book "SSL and TLS Essentials" by Stephen
Thomas, which complements this book well, as it goes into a lot of detail on the protocol without any information at all about
the programming side.
Most Helpful Customer Reviews on Amazon.com (beta)
Amazon.com:
16 reviews
25 of 25 people found the following review helpful
openssl programming cleanly explained
12 Oct 2004
Format:Paperback
The book starts with a general introduction of encryption in general, then SSL protocol in general. Then openssl command line interface is introduced with some easy to follow examples. Later openssl programming is explained in detail.
As the only free SSL programming library with source code available, openssl is notorious for its undocumented/underdocumented/misdocumented manuals. Starting a software project using openssl without prior experience is often a painful experience if you simply rely on the manuals coming with the source code. Given thousands of interfaces/data structures, it is an overwhelming job to understand openssl in depth. Your best bet is usually reading the sample source code that comes with package, but often it leaves lots of questions - what does this api do? Why use this one? Under what circumstances should I use this one? You may rely on openssl mailing list, but answer is not guaranteed and you have to do your own home work first.
So come this book finally. It explains (using many examples) most interfaces a typical openssl programmer would use in reality. It is a really easy to read from chapter to chapter since the authors apparently try to explain most api using a short and clear example.
I wish when the next version comes out, it can do:
1. fix typos. Yeah, it does contain some typos. Good proofreading is needed.
2. Include topics in openssl 0.9.7. Like CRL.
3. What's going on under hood. How openssl code is organized, how interface control of flow goes. This helps understand the openssl library and debugging as well.
As the only free SSL programming library with source code available, openssl is notorious for its undocumented/underdocumented/misdocumented manuals. Starting a software project using openssl without prior experience is often a painful experience if you simply rely on the manuals coming with the source code. Given thousands of interfaces/data structures, it is an overwhelming job to understand openssl in depth. Your best bet is usually reading the sample source code that comes with package, but often it leaves lots of questions - what does this api do? Why use this one? Under what circumstances should I use this one? You may rely on openssl mailing list, but answer is not guaranteed and you have to do your own home work first.
So come this book finally. It explains (using many examples) most interfaces a typical openssl programmer would use in reality. It is a really easy to read from chapter to chapter since the authors apparently try to explain most api using a short and clear example.
I wish when the next version comes out, it can do:
1. fix typos. Yeah, it does contain some typos. Good proofreading is needed.
2. Include topics in openssl 0.9.7. Like CRL.
3. What's going on under hood. How openssl code is organized, how interface control of flow goes. This helps understand the openssl library and debugging as well.
9 of 9 people found the following review helpful
Great Book to Use When Writing an SSL app.
28 May 2005
Format:Paperback
If you have little or no experience with SSL, or OpenSSL, get this book. It explains the principles behind SSL, and then goes on to cover OpenSSL. The companion website opensslbook.com contains the latest examples.
The only drawbacks to the book are the way that the authors cover random number generators for windows, (totally excludes the MS crypto function cryptgenrand(), in favor of the Author's own entropy collection system), and the creation of certificates could have been covered a little better. I also kept having to consult the Openssl API documentation for clarification on certain things, but overall this is a great book.
The only drawbacks to the book are the way that the authors cover random number generators for windows, (totally excludes the MS crypto function cryptgenrand(), in favor of the Author's own entropy collection system), and the creation of certificates could have been covered a little better. I also kept having to consult the Openssl API documentation for clarification on certain things, but overall this is a great book.
15 of 18 people found the following review helpful
Excellent!
22 Nov 2002
Format:Paperback
OpenSSL is a terrific programming resource, but the online documentation on it
is hard to understand and index. This book brings most of it all together, and
provides enough examples to answer most of your questions.
is hard to understand and index. This book brings most of it all together, and
provides enough examples to answer most of your questions.
One thing that it lacks is tie-ins with Java; most of its examples are in Perl
and Python. I'm currently trying to see if certain ideas can be implemented in Java.
A great book, and great read!
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