RSA Command

Performs RSA operations including signing, verification, and key management. Can handle both DER and PEM format for input and output.

RSA Sign

wolfssl rsa -sign -inkey <priv_key> -in <filename> -out <filename>

RSA Verify with Private Key

wolfssl rsa -verify -inkey <priv_key> -sigfile <filename> -out <filename>

RSA Verify with Public Key

wolfssl rsa -verify -inkey <pub_key> -sigfile <filename> -out <filename> -pubin

Arguments:

[-sign] sign the input data
[-verify] verify the signature
[-inkey] key file for signing/verification
[-in] input file to sign or process
[-out] file to write result to (defaults to stdout)
[-sigfile] signature file for verification
[-pubin] expect a public key input
[-inform] PEM or DER input format (defaults to PEM)
[-outform] PEM or DER output format (defaults to PEM)
[-passin] password for PEM encrypted files
[-noout] do not print the key out when set
[-modulus] print out the RSA modulus (n value)

Example:

wolfssl rsa -sign -inkey private.pem -in data.txt -out signature.bin

wolfssl rsa -verify -inkey public.pem -sigfile signature.bin -out verified.txt -pubin