For certain signature encoding schemes (eg. RSASSA-PSS), the verify/sign operation behavior depends on information contained in the signature blob. Allow passing this down to the crypto_template by introducing a crypto_akcipher_set_sig_params() call. Signed-off-by: Varad Gautam <varad.gautam@xxxxxxxx> --- crypto/rsa-common.c | 1 + include/crypto/akcipher.h | 26 ++++++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/crypto/rsa-common.c b/crypto/rsa-common.c index 6ed258a78287..f80cdfcc1f9e 100644 --- a/crypto/rsa-common.c +++ b/crypto/rsa-common.c @@ -277,6 +277,7 @@ int rsapad_akcipher_create(struct crypto_template *tmpl, struct rtattr **tb, inst->alg.set_pub_key = alg->set_pub_key; inst->alg.set_priv_key = alg->set_priv_key; inst->alg.max_size = alg->max_size; + inst->alg.set_sig_params = alg->set_sig_params; inst->alg.reqsize = sizeof(struct rsapad_akciper_req_ctx) + rsa_alg->reqsize; inst->free = rsapad_akcipher_free; diff --git a/include/crypto/akcipher.h b/include/crypto/akcipher.h index 1d3aa252caba..a0e872029429 100644 --- a/include/crypto/akcipher.h +++ b/include/crypto/akcipher.h @@ -101,6 +101,8 @@ struct akcipher_alg { unsigned int (*max_size)(struct crypto_akcipher *tfm); int (*init)(struct crypto_akcipher *tfm); void (*exit)(struct crypto_akcipher *tfm); + int (*set_sig_params)(struct crypto_akcipher *tfm, const void *sig, + unsigned int sig_len); unsigned int reqsize; struct crypto_alg base; @@ -413,4 +415,28 @@ static inline int crypto_akcipher_set_priv_key(struct crypto_akcipher *tfm, return alg->set_priv_key(tfm, key, keylen); } + +/** + * crypto_akcipher_set_sig_params() - Invoke set sig params operation + * + * Use this if the verification/signing operation behavior depends on + * parameters contained in the signature. + * + * @tfm: tfm handle + * @sig: ptr to a struct public_key_signature to extract info from + * @siglen: Length of sig - should be unnecessary if you pass the struct. + * + * Return: zero on success; error code in case of error + */ +static inline int crypto_akcipher_set_sig_params(struct crypto_akcipher *tfm, + const void *sig, + unsigned int siglen) +{ + struct akcipher_alg *alg = crypto_akcipher_alg(tfm); + + if (alg->set_sig_params) + return alg->set_sig_params(tfm, sig, siglen); + else + return -EOPNOTSUPP; +} #endif -- 2.30.2