™.. EVP_PKEY_get_default_digest - Online Linux Manual PageSection : 3
Updated : 2013-02-11
Source : 1.0.1e
Note : OpenSSL

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NAMEEVP_PKEY_get_default_digest_nid − get default signature digest

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SYNOPSIS​ #include <openssl/evp.h> ​ int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid);

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DESCRIPTIONThe EVP_PKEY_get_default_digest_nid() function sets pnid to the default message digest NID for the public key signature operations associated with key ​pkey.

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NOTESFor all current standard OpenSSL public key algorithms SHA1 is returned.

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RETURN VALUESThe EVP_PKEY_get_default_digest_nid() function returns 1 if the message digest is advisory (that is other digests can be used) and 2 if it is mandatory (other digests can not be used). It returns 0 or a negative value for failure. In particular a return value of −2 indicates the operation is not supported by the public key algorithm.

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SEE ALSO​EVP_PKEY_CTX_new (3), ​EVP_PKEY_sign (3), ​EVP_PKEY_verify (3), ​EVP_PKEY_verify_recover (3),

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HISTORYThis function was first added to OpenSSL 1.0.0. 0

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