Session Key Generation In Php
Session-Key Generation using Human Passwords Only OdedGoldreich? AndYehudaLindell DepartmentofComputerScienceandAppliedMath, WeizmannInstituteofScience,Rehovot,Israel. API Command: generatesessionkey The generatesessionkey command creates a new session key to be used in starting a support session. Note that if your Secure Remote Access Appliance has multiple public sites, the session key created may be associated with any of these sites, depending on the method used to download the customer client. Start a PHP Session A session is started with the sessionstart function. Session variables are set with the PHP global variable: $SESSION. To generate an ECDH session key on the host with a DS28C36, the host must collect the Device Public Key, MANID, and page data from the DS28C36. As shown in Figure 6 the Device Public Key and Master Private Key are used to calculate a new shared point on the elliptic curve. Jan 26, 2011 I could then call that with CURL from the PHP code when it needs to generate a brand new session ID, so that the session ID that is used will be accepted by ASP.NET. Completely replace the entire session module in our ASP.NET code with a custom session module.
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| Documentation |
| #include <openssl/evp.h> |
Encryption and decryption with asymmetric keys is computationally expensive. Typically then messages are not encrypted directly with such keys but are instead encrypted using a symmetric 'session' key. This key is itself then encrypted using the public key. In OpenSSL this combination is referred to as an envelope. It is also possible to encrypt the session key with multiple public keys. This way the message can be sent to a number of different recipients (one for each public key used). The session key is the same for each recipient.
The OpenSSL manual pages for dealing with envelopes can be found here: Manual:EVP_SealInit(3) and Manual:EVP_OpenInit(3)
Sealing an Envelope[edit]
An envelope is sealed using the EVP_Seal* set of functions, and an operation consists of the following steps:
- Initialise the context
- Initialise the seal operation, providing the symmetric cipher that will be used, along with the set of public keys to encrypt the session key with
- Provide the message to be encrypted.
- Complete the encryption operation
This can be seen in the following example code:
Opening and Envelope[edit]
An envelope is opened using the EVP_Open* set of functions in the following steps:
Session Php Servicegroupid
- Initialise the context
- Initialise the open operation, providing the symmetric cipher that has been used, along with the private key to decrypt the session key with
- Provide the message to be decrypted and decrypt using the session key
- Complete the decryption operation
See the following code for an example: