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(gpgme.info)Decrypt and Verify

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Decrypt and Verify
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 - Function: GpgmeError gpgme_op_decrypt_verify (GpgmeCtx CTX,
          GpgmeData CIPHER, GpgmeData PLAIN, GpgmeSigStat *R_STAT)
     The function `gpgme_op_decrypt_verify' decrypts the ciphertext in
     the data object CIPHER and stores it into the data object PLAIN.
     If CIPHER contains signatures, they will be verified and their
     combined status will be returned in R_STAT.

     After the operation completed, `gpgme_op_get_sig_status' and
     `gpgme_op_get_sig_key' can be used to retrieve more information
     about the signatures.

     The function returns `GPGME_No_Error' if the ciphertext could be
     decrypted successfully, `GPGME_Invalid_Value' if CTX, CIPHER,
     PLAIN or R_STAT is not a valid pointer, `GPGME_No_Data' if CIPHER
     does not contain any data to decrypt, `GPGME_Decryption_Failed' if
     CIPHER is not a valid cipher text, `GPGME_No_Passphrase' if the
     passphrase for the secret key could not be retrieved, and passes
     through any errors that are reported by the crypto engine support
     routines.

 - Function: GpgmeError gpgme_op_decrypt_verify (GpgmeCtx CTX,
          GpgmeData CIPHER, GpgmeData PLAIN)
     The function `gpgme_op_decrypt_verify_start' initiates a
     `gpgme_op_decrypt_verify' operation.  It can be completed by
     calling `gpgme_wait' on the context.  Note: Waiting For
     Completion.

     The function returns `GPGME_No_Error' if the operation could be
     started successfully, `GPGME_Invalid_Value' if CTX, CIPHER, PLAIN
     or R_STAT is not a valid pointer, and `GPGME_No_Data' if CIPHER
     does not contain any data to decrypt.