Generate private/public key (RSA format)

OpenSSH-to-RSA.sh

# Convert 4096-bit OpenSSH private key to RSA format
# Input -----BEGIN OPENSSH PRIVATE KEY----- b3BlbnNz...QECAwQ= -----END OPENSSH PRIVATE KEY-----
# Output -----BEGIN RSA PRIVATE KEY----- MIICXAI...OsuOpw= -----END RSA PRIVATE KEY-----
ssh-keygen -p -m pem -f private-key-file-name

# Convert given pub file to PEM format
# Input ssh-rsa AAAAB3NzaC1yc2EAAAADAQA....== [email protected]
# Ouput -----BEGIN RSA PUBLIC KEY----- MIGJAoG...gMBAAE= -----END RSA PUBLIC KEY-----
ssh-keygen -f public-key.pub -e -m pem

OpenSSH.sh

# Generate 4096-bit RSA with given alias in OpenSSH format
ssh-keygen -t rsa -b 4096 -C <alias-goes-here>

# Output public key from private key (OpenSSH)
ssh-keygen -y -f output.pub

RSA-to-OpenSSH.sh

# Convert RSA private key to OpenSSH format
# NOTE: The original PEM file will be overwritten. Make sure you have a backup
# Input -----BEGIN RSA PRIVATE KEY----- MIICXAI...OsuOpw= -----END RSA PRIVATE KEY-----
# Output -----BEGIN OPENSSH PRIVATE KEY----- b3BlbnNz...QECAwQ= -----END OPENSSH PRIVATE KEY-----
ssh-keygen -p -N "" -f rsa-format.pem

RSA.sh

# Generate 4096-bit RSA with given alias in RSA format
ssh-keygen -t rsa -b 4096 -C <alias-goes-here> -m pem

Fmcgzs

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