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Title "RSA_SIZE 3" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
RSA_size, RSA_bits, RSA_security_bits - get RSA modulus size or security bits Header "SYNOPSIS" .Vb 1 #include <openssl/rsa.h> \& int RSA_size(const RSA *rsa); \& int RSA_bits(const RSA *rsa); \& int RSA_security_bits(const RSA *rsa) .Ve Header "DESCRIPTION" \fBRSA_size() returns the \s-1RSA\s0 modulus size in bytes. It can be used to determine how much memory must be allocated for an \s-1RSA\s0 encrypted value.

\fBRSA_bits() returns the number of significant bits.

\fBrsa and rsa->n must not be \s-1NULL\s0.

\fBRSA_security_bits() returns the number of security bits of the given rsa key. See BN_security_bits\|(3).

Header "RETURN VALUES" \fBRSA_size() returns the size of modulus in bytes.

\fBDSA_bits() returns the number of bits in the key.

\fBRSA_security_bits() returns the number of security bits.

Header "SEE ALSO" \fBBN_num_bits\|(3) Header "HISTORY" The RSA_bits() function was added in OpenSSL 1.1.0. Header "COPYRIGHT" Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.