On Thu 2013-08-22 19:01:41, Lee, Chun-Yi wrote:
> Implement EMSA_PKCS1-v1_5-ENCODE [RFC3447 sec 9.2] in rsa.c. It's the
> first step of signature generation operation
> (RSASSA-PKCS1-v1_5-SIGN).
Is this your own code, or did you copy it from somewhere?
> + if (!T)
> + goto error_T;
> +
> + memcpy(T, RSA_ASN1_templates[hash_algo].data, RSA_ASN1_templates[hash_algo].size);
> + memcpy(T + RSA_ASN1_templates[hash_algo].size, pks->digest, pks->digest_size);
> +
> + /* 3) check If emLen < tLen + 11, output "intended encoded message length too short" */
> + if (emLen < tLen + 11) {
> + ret = EINVAL;
> + goto error_emLen;
> + }
Normal kernel calling convention is 0 / -EINVAL.
> + memcpy(EM + 2, PS, emLen - tLen - 3);
> + EM[2 + emLen - tLen - 3] = 0x00;
> + memcpy(EM + 2 + emLen - tLen - 3 + 1, T, tLen);
ThisDoesNotLookLikeKernelCode, NoCamelCase, please.
> + *_EM = EM;
And we don't usually use _ prefix like this.
> --- a/include/crypto/public_key.h
> +++ b/include/crypto/public_key.h
> @@ -110,6 +110,8 @@ extern void public_key_destroy(void *payload);
> struct public_key_signature {
> u8 *digest;
> u8 digest_size; /* Number of bytes in digest */
> + u8 *S; /* signature S of length k octets */
u8 *signature?
> + size_t k; /* length k of signature S */
u8 *signature_length.
--
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