[Solved] I want to encrypt blob using SHA in javascript

Question

This is not possible.

SHA is a cryptographic hash function, not an encryption function – the result is not reversible. See Fundamental difference between Hashing and Encryption algorithms for an in-depth explanation.

Now, to really encrypt data in JavaScript (say with AES), there are several options. Since it is hard to get cryptography and key exchange correct, using a hand-rolled encryption scheme may be no better than plain-text. As such, normally one would just use HTTPS to ensure the entire channel is securely¹ encrypted.

¹ HTTPS itself is “secure” with the correct negotiation options and patches.

Accepted Answer

This is not possible.

SHA is a cryptographic hash function, not an encryption function – the result is not reversible. See Fundamental difference between Hashing and Encryption algorithms for an in-depth explanation.

Now, to really encrypt data in JavaScript (say with AES), there are several options. Since it is hard to get cryptography and key exchange correct, using a hand-rolled encryption scheme may be no better than plain-text. As such, normally one would just use HTTPS to ensure the entire channel is securely¹ encrypted.

¹ HTTPS itself is “secure” with the correct negotiation options and patches.