crypto/rsa_helper.c

Source file repositories/reference/linux-study-clean/crypto/rsa_helper.c

File Facts

System
Linux kernel
Corpus path
crypto/rsa_helper.c
Extension
.c
Size
4126 bytes
Lines
187
Domain
Kernel Services
Bucket
crypto
Inferred role
Kernel Services: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

Dependency Surface

Detected Declarations

Annotated Snippet

while (n_sz && !*ptr) {
			ptr++;
			n_sz--;
		}

		/* In FIPS mode only allow key size 2K and higher */
		if (n_sz < 256) {
			pr_err("RSA: key size not allowed in FIPS mode\n");
			return -EINVAL;
		}
	}

	key->n = value;
	key->n_sz = vlen;

	return 0;
}

int rsa_get_e(void *context, size_t hdrlen, unsigned char tag,
	      const void *value, size_t vlen)
{
	struct rsa_key *key = context;

	/* invalid key provided */
	if (!value || !key->n_sz || !vlen || vlen > key->n_sz)
		return -EINVAL;

	key->e = value;
	key->e_sz = vlen;

	return 0;
}

int rsa_get_d(void *context, size_t hdrlen, unsigned char tag,
	      const void *value, size_t vlen)
{
	struct rsa_key *key = context;

	/* invalid key provided */
	if (!value || !key->n_sz || !vlen || vlen > key->n_sz)
		return -EINVAL;

	key->d = value;
	key->d_sz = vlen;

	return 0;
}

int rsa_get_p(void *context, size_t hdrlen, unsigned char tag,
	      const void *value, size_t vlen)
{
	struct rsa_key *key = context;

	/* invalid key provided */
	if (!value || !vlen || vlen > key->n_sz)
		return -EINVAL;

	key->p = value;
	key->p_sz = vlen;

	return 0;
}

int rsa_get_q(void *context, size_t hdrlen, unsigned char tag,
	      const void *value, size_t vlen)
{
	struct rsa_key *key = context;

	/* invalid key provided */
	if (!value || !vlen || vlen > key->n_sz)
		return -EINVAL;

	key->q = value;
	key->q_sz = vlen;

	return 0;
}

int rsa_get_dp(void *context, size_t hdrlen, unsigned char tag,
	       const void *value, size_t vlen)
{
	struct rsa_key *key = context;

	/* invalid key provided */
	if (!value || !vlen || vlen > key->n_sz)
		return -EINVAL;

	key->dp = value;
	key->dp_sz = vlen;

Annotation

Implementation Notes