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[crypto] Remove obsolete maximum output length method

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Now that public-key algorithms use ASN.1 builders to dynamically
allocate the output data, there is no further need for callers to be
able to determine the maximum output length.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-12-02 13:13:01 +00:00
parent 1ccc320ee9
commit 3e566818f7
3 changed files with 0 additions and 40 deletions
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5
src/crypto/crypto_null.c
View File

@@ -93,10 +93,6 @@ struct cipher_algorithm cipher_null = {
.auth = cipher_null_auth,
};
size_t pubkey_null_max_len ( const struct asn1_cursor *key __unused ) {
return 0;
}
int pubkey_null_encrypt ( const struct asn1_cursor *key __unused,
const struct asn1_cursor *plaintext __unused,
struct asn1_builder *ciphertext __unused ) {
@@ -125,7 +121,6 @@ int pubkey_null_verify ( const struct asn1_cursor *key __unused,
struct pubkey_algorithm pubkey_null = {
.name = "null",
.max_len = pubkey_null_max_len,
.encrypt = pubkey_null_encrypt,
.decrypt = pubkey_null_decrypt,
.sign = pubkey_null_sign,

22
src/crypto/rsa.c
View File

@@ -287,27 +287,6 @@ static int rsa_init ( struct rsa_context *context,
return rc;
}
/**
* Calculate RSA maximum output length
*
* @v key Key
* @ret max_len Maximum output length
*/
static size_t rsa_max_len ( const struct asn1_cursor *key ) {
struct asn1_cursor modulus;
struct asn1_cursor exponent;
int rc;
/* Parse moduli and exponents */
if ( ( rc = rsa_parse_mod_exp ( &modulus, &exponent, key ) ) != 0 ) {
/* Return a zero maximum length on error */
return 0;
}
/* Output length can never exceed modulus length */
return modulus.len;
}
/**
* Perform RSA cipher operation
*
@@ -706,7 +685,6 @@ static int rsa_match ( const struct asn1_cursor *private_key,
/** RSA public-key algorithm */
struct pubkey_algorithm rsa_algorithm = {
.name = "rsa",
.max_len = rsa_max_len,
.encrypt = rsa_encrypt,
.decrypt = rsa_decrypt,
.sign = rsa_sign,