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kennwhite / multi_key_crypto.sh
Last active January 16, 2024 15:47
OpenSSL command line recipe for multi-public key file encryption. Any single private key paired to one of the public keys can decrypt the file.
#!/usr/bin/env bash
#
# Example of multiple key AES encryption for text files using the openssl v. 0.9.8+ command line utility
# Uses n public certs as key for MIME PKCS envelope, any individual private key can decrypt.
#
# If standard RSA ssh keys exist, these can be converted to public certs as well (and ssh keys can decrypt)
#
# To sign (and verify) the encrypted file, one of the private keys is required, see:
# http://www.openssl.org/docs/apps/smime.html#EXAMPLES for openssl smime examples
# or http://www.openssl.org/docs/apps/cms.html#EXAMPLES for cms utility (OpenSSL v. 1.0+)