[#RSA_sign]
= RSA_sign
:mrdocs:

Create an RSA signature with PKCS#1 DigestInfo wrapping (deprecated).

== Synopsis

Declared in `<openssl/rsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
RSA_sign(
    int type,
    unsigned char const* m,
    unsigned int m_length,
    unsigned char* sigret,
    unsigned int* siglen,
    xref:RSA.adoc[RSA]* rsa);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *type*
| Digest NID identifying the hash algorithm (for example NID_sha256).
| *m*
| Digest bytes to sign.
| *m_length*
| Length of `m` in bytes.
| *sigret*
| Buffer of at least RSA_size(`rsa)` bytes receiving the signature.
| *siglen*
| Receives the signature length in bytes.
| *rsa*
| RSA private key.
|===


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