[#EVP_PKEY_CTX_set1_rsa_keygen_pubexp]
= EVP_PKEY_CTX_set1_rsa_keygen_pubexp
:mrdocs:

Set the RSA public exponent for key generation, copying `pubexp.`

== Synopsis

Declared in `<openssl/rsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_CTX_set1_rsa_keygen_pubexp(
    xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]* ctx,
    xref:BIGNUM.adoc[BIGNUM]* pubexp);
----

== Return Value

1 on success, or a non‐positive value on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Keygen context for an RSA algorithm.
| *pubexp*
| Public exponent to copy (typically an odd integer such as 65537); caller retains ownership.
|===


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