[#RSA_verify_ASN1_OCTET_STRING]
= RSA_verify_ASN1_OCTET_STRING
:mrdocs:

Verify an RSA signature that wraps a DigestInfo‐style ASN.1 OCTET STRING (deprecated).

== Synopsis

Declared in `<openssl/rsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
RSA_verify_ASN1_OCTET_STRING(
    int type,
    unsigned char const* m,
    unsigned int m_length,
    unsigned char* sigbuf,
    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 if the signature is valid, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *type*
| NID of the digest algorithm expected inside the recovered DigestInfo.
| *m*
| Expected digest bytes.
| *m_length*
| Length of `m` in bytes.
| *sigbuf*
| Signature bytes to verify.
| *siglen*
| Length of `sigbuf` in bytes.
| *rsa*
| RSA public key used for verification.
|===


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