How can I use openssl(*from the CLI) to encrypt a message using my public key and then decrypt it using my private key?

Question

Here is what I've tried:

Encrypt message w/ my public key

openssl enc -aes-256-cbc -salt -kfile key.pub -in message.txt -out message.enc

Decrypt message using my private key

openssl enc -d -aes-256-cbc -salt -in message.enc -pass file:mykey.pem 

Error from decryption

bad decrypt
452:error:06065064:digital envelope routines:EVP_DecryptFinal_ex:bad decrypt:evp_enc.c:330:

Answer 1

Encrypt:

openssl enc -aes-256-cbc -salt -pass file:password.txt -in message.txt -out message.enc

Decrypt:

openssl enc -aes-256-cbc -d -salt -pass file:password.txt -in message.enc -out message.dec

Where the first line of the file password.txt contains your password.

Answer 2

This worked:

openssl rsautl -pubin -inkey key.pub -encrypt -in message.txt -out message.enc

openssl rsautl -inkey privkey.pem -decrypt -in message.enc -out message.dec