Software: Apache. PHP/5.6.40 

uname -a: Linux cpanel06wh.bkk1.cloud.z.com 2.6.32-954.3.5.lve1.4.80.el6.x86_64 #1 SMP Thu Sep 24
01:42:00 EDT 2020 x86_64 

uid=851(cp949260) gid=853(cp949260) groups=853(cp949260) 

Safe-mode: OFF (not secure)

/opt/cpanel/ea-openssl11/share/doc/openssl/html/man3/   drwxr-xr-x
Free 221.45 GB of 981.82 GB (22.56%)
                            Encoder    Tools    Proc.    FTP brute    Sec.    SQL    PHP-code    Update    Feedback    Self remove    Logout    

Viewing file:     RSA_public_decrypt.html (3.73 KB)      -rw-r--r--

NAME

RSA_private_encrypt, RSA_public_decrypt - low-level signature operations

SYNOPSIS

 #include <openssl/rsa.h>

 int RSA_private_encrypt(int flen, unsigned char *from,
                         unsigned char *to, RSA *rsa, int padding);

 int RSA_public_decrypt(int flen, unsigned char *from,
                        unsigned char *to, RSA *rsa, int padding);

DESCRIPTION

These functions handle RSA signatures at a low-level.

RSA_private_encrypt() signs the flen bytes at from (usually a message digest with an algorithm identifier) using the private key rsa and stores the signature in to. to must point to RSA_size(rsa) bytes of memory.

padding denotes one of the following modes:

RSA_PKCS1_PADDING

PKCS #1 v1.5 padding. This function does not handle the algorithmIdentifier specified in PKCS #1. When generating or verifying PKCS #1 signatures, RSA_sign(3) and RSA_verify(3) should be used.

RSA_NO_PADDING

Raw RSA signature. This mode should only be used to implement cryptographically sound padding modes in the application code. Signing user data directly with RSA is insecure.

RSA_public_decrypt() recovers the message digest from the flen bytes long signature at from using the signer's public key rsa. to must point to a memory section large enough to hold the message digest (which is smaller than RSA_size(rsa) - 11). padding is the padding mode that was used to sign the data.

RETURN VALUES

RSA_private_encrypt() returns the size of the signature (i.e., RSA_size(rsa)). RSA_public_decrypt() returns the size of the recovered message digest.

On error, -1 is returned; the error codes can be obtained by ERR_get_error(3).

SEE ALSO

ERR_get_error(3), RSA_sign(3), RSA_verify(3)

COPYRIGHT

Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html.