NAME¶

decrypt - Decrypts a message

SYNOPSIS¶

decrypt [-o|--output] [-n|--signatures] [--signer-cert] [--recipient-key] [--private-key-store] [--dump-session-key] [--session-key] [--dump] [-x|--hex] [-h|--help] [FILE]

DESCRIPTION¶

Decrypts a message

Decrypts a message using either supplied keys, or by prompting for a password. If message tampering is detected, an error is returned. See below for details.

If certificates are supplied using the "--signer-cert" option, any signatures that are found are checked using these certificates. Verification is only successful if there is no bad signature, and the number of successfully verified signatures reaches the threshold configured with the "--signatures" parameter.

If the signature verification fails, or if message tampering is detected, the program terminates with an exit status indicating failure. In addition to that, the last 25 MiB of the message are withheld, i.e. if the message is smaller than 25 MiB, no output is produced, and if it is larger, then the output will be truncated.

The converse operation is "sq encrypt".

OPTIONS¶

-o, --output=FILE

Writes to FILE or stdout if omitted

-n, --signatures=N

Sets the threshold of valid signatures to N. The message will only be considered verified if this threshold is reached. [default: 1 if at least one signer cert file is given, 0 otherwise]

--signer-cert=CERT

Verifies signatures with CERT

--recipient-key=KEY

Decrypts with KEY

--private-key-store=KEY_STORE

Provides parameters for private key store

--dump-session-key

Prints the session key to stderr

--session-key=SESSION-KEY

Decrypts an encrypted message using SESSION-KEY

--dump

Prints a packet dump to stderr

-x, --hex

Prints a hexdump (implies --dump)

-h, --help

Print help information

[FILE]

Reads from FILE or stdin if omitted

EXAMPLES¶

Decrypt a file using a secret key

 sq decrypt --recipient-key juliet.pgp ciphertext.pgp

Decrypt a file verifying signatures

 sq decrypt --recipient-key juliet.pgp --signer-cert romeo.pgp ciphertext.pgp

Decrypt a file using a password

 sq decrypt ciphertext.pgp

SEE ALSO¶

For the full documentation see <https://docs.sequoia-pgp.org/sq/>.

sq(1) sq-armor(1) sq-autocrypt(1) sq-certify(1) sq-dearmor(1) sq-encrypt(1) sq-inspect(1) sq-key(1) sq-keyring(1) sq-keyserver(1) sq-packet(1) sq-revoke(1) sq-sign(1) sq-verify(1) sq-wkd(1)