OpenSSLUser Manual and Data Format

1

Main Functions

• Benchmark

• Certificates

• Digital Signature

• Encryption/Decryption

• Private and Public Keys

• a lot of other stuff...

2

OpenSSLSymmetric Encryption

3

openssl enc

• cipher

• salt

• key

• initial vector

• password

• ...

4

password?5

EVP_BytesToKey

arguments

• type of cipher (des3, aes & others)

• salt

• data and data length

• iteration counter

• hash

results

• key

• initial vector

• key length

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openssl enc -des3 -in file.txt -out file.enc-salt -k mySillyPassword -md md5

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0 ... ... ...D =

means “concatenation”

HASH (data)= HASH(HASH(data))2

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key & iv

0 A4 0C 80 14 75 41 21 90

key iv

9

salt10

salt

without salt your disheswill always taste the same!

the same applies to keysand initial vectors!

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D e m o

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