[#EVP_PKEY_decrypt]
= EVP_PKEY_decrypt
:mrdocs:

Decrypt data using the private key bound to `ctx.`

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_decrypt(
    xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]* ctx,
    unsigned char* out,
    size_t* outlen,
    unsigned char const* in,
    size_t inlen);
----

== Return Value

1 on success, or 0 / a negative value on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Context previously initialized with EVP_PKEY_decrypt_init().
| *out*
| Buffer receiving plaintext, or NULL to query the required size.
| *outlen*
| In/out length of `out;` on return holds bytes written or needed.
| *in*
| Ciphertext bytes to decrypt.
| *inlen*
| Length of `in` in bytes.
|===


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