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crypto: Support DER encodings

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Add encoding interfaces for DER encoding:
1. support decoding of 'bit string', 'octet string', 'object id'
and 'context specific tag' for DER encoder.
2. implemented a simple DER encoder.
3. add more testsuits for DER encoder.

Signed-off-by: lei he <helei.sig11@bytedance.com>
Message-Id: <20221008085030.70212-3-helei.sig11@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Lei He 2022-10-08 16:50:28 +08:00 committed by Michael S. Tsirkin
parent 2fda101de0
commit 3b34ccad66
3 changed files with 600 additions and 50 deletions
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313
crypto/der.c
View File

@ -22,20 +22,93 @@
#include "qemu/osdep.h"
#include "crypto/der.h"
typedef struct QCryptoDerEncodeNode {
uint8_t tag;
struct QCryptoDerEncodeNode *parent;
struct QCryptoDerEncodeNode *next;
/* for constructed type, data is null */
const uint8_t *data;
size_t dlen;
} QCryptoDerEncodeNode;
typedef struct QCryptoEncodeContext {
QCryptoDerEncodeNode root;
QCryptoDerEncodeNode *current_parent;
QCryptoDerEncodeNode *tail;
} QCryptoEncodeContext;
enum QCryptoDERTypeTag {
QCRYPTO_DER_TYPE_TAG_BOOL = 0x1,
QCRYPTO_DER_TYPE_TAG_INT = 0x2,
QCRYPTO_DER_TYPE_TAG_BIT_STR = 0x3,
QCRYPTO_DER_TYPE_TAG_OCT_STR = 0x4,
QCRYPTO_DER_TYPE_TAG_OCT_NULL = 0x5,
QCRYPTO_DER_TYPE_TAG_OCT_OID = 0x6,
QCRYPTO_DER_TYPE_TAG_NULL = 0x5,
QCRYPTO_DER_TYPE_TAG_OID = 0x6,
QCRYPTO_DER_TYPE_TAG_SEQ = 0x10,
QCRYPTO_DER_TYPE_TAG_SET = 0x11,
};
#define QCRYPTO_DER_CONSTRUCTED_MASK 0x20
enum QCryptoDERTagClass {
QCRYPTO_DER_TAG_CLASS_UNIV = 0x0,
QCRYPTO_DER_TAG_CLASS_APPL = 0x1,
QCRYPTO_DER_TAG_CLASS_CONT = 0x2,
QCRYPTO_DER_TAG_CLASS_PRIV = 0x3,
};
enum QCryptoDERTagEnc {
QCRYPTO_DER_TAG_ENC_PRIM = 0x0,
QCRYPTO_DER_TAG_ENC_CONS = 0x1,
};
#define QCRYPTO_DER_TAG_ENC_MASK 0x20
#define QCRYPTO_DER_TAG_ENC_SHIFT 5
#define QCRYPTO_DER_TAG_CLASS_MASK 0xc0
#define QCRYPTO_DER_TAG_CLASS_SHIFT 6
#define QCRYPTO_DER_TAG_VAL_MASK 0x1f
#define QCRYPTO_DER_SHORT_LEN_MASK 0x80
#define QCRYPTO_DER_TAG(class, enc, val) \
(((class) << QCRYPTO_DER_TAG_CLASS_SHIFT) | \
((enc) << QCRYPTO_DER_TAG_ENC_SHIFT) | (val))
/**
* qcrypto_der_encode_length:
* @src_len: the length of source data
* @dst: distination to save the encoded 'length', if dst is NULL, only compute
* the expected buffer size in bytes.
* @dst_len: output parameter, indicates how many bytes wrote.
*
* Encode the 'length' part of TLV tuple.
*/
static void qcrypto_der_encode_length(size_t src_len,
uint8_t *dst, size_t *dst_len)
{
size_t max_length = 0xFF;
uint8_t length_bytes = 0, header_byte;
if (src_len < QCRYPTO_DER_SHORT_LEN_MASK) {
header_byte = src_len;
*dst_len = 1;
} else {
for (length_bytes = 1; max_length < src_len; length_bytes++) {
max_length = (max_length << 8) + max_length;
}
header_byte = length_bytes;
header_byte |= QCRYPTO_DER_SHORT_LEN_MASK;
*dst_len = length_bytes + 1;
}
if (!dst) {
return;
}
*dst++ = header_byte;
/* Bigendian length bytes */
for (; length_bytes > 0; length_bytes--) {
*dst++ = ((src_len >> (length_bytes - 1) * 8) & 0xFF);
}
}
static uint8_t qcrypto_der_peek_byte(const uint8_t **data, size_t *dlen)
{
return **data;
@ -150,40 +223,230 @@ static int qcrypto_der_extract_data(const uint8_t **data, size_t *dlen,
return qcrypto_der_extract_definite_data(data, dlen, cb, ctx, errp);
}
int qcrypto_der_decode_int(const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb, void *ctx, Error **errp)
static int qcrypto_der_decode_tlv(const uint8_t expected_tag,
const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb,
void *ctx, Error **errp)
{
const uint8_t *saved_data = *data;
size_t saved_dlen = *dlen;
uint8_t tag;
int data_length;
if (*dlen < 1) {
error_setg(errp, "Need more data");
return -1;
}
tag = qcrypto_der_cut_byte(data, dlen);
/* INTEGER must encoded in primitive-form */
if (tag != QCRYPTO_DER_TYPE_TAG_INT) {
error_setg(errp, "Invalid integer type tag: %u", tag);
return -1;
if (tag != expected_tag) {
error_setg(errp, "Unexpected tag: expected: %u, actual: %u",
expected_tag, tag);
goto error;
}
return qcrypto_der_extract_data(data, dlen, cb, ctx, errp);
data_length = qcrypto_der_extract_data(data, dlen, cb, ctx, errp);
if (data_length < 0) {
goto error;
}
return data_length;
error:
*data = saved_data;
*dlen = saved_dlen;
return -1;
}
int qcrypto_der_decode_int(const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb, void *ctx, Error **errp)
{
const uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_PRIM,
QCRYPTO_DER_TYPE_TAG_INT);
return qcrypto_der_decode_tlv(tag, data, dlen, cb, ctx, errp);
}
int qcrypto_der_decode_seq(const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb, void *ctx, Error **errp)
{
uint8_t tag;
if (*dlen < 1) {
error_setg(errp, "Need more data");
return -1;
}
tag = qcrypto_der_cut_byte(data, dlen);
/* SEQUENCE must use constructed form */
if (tag != (QCRYPTO_DER_TYPE_TAG_SEQ | QCRYPTO_DER_CONSTRUCTED_MASK)) {
error_setg(errp, "Invalid type sequence tag: %u", tag);
return -1;
}
return qcrypto_der_extract_data(data, dlen, cb, ctx, errp);
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_CONS,
QCRYPTO_DER_TYPE_TAG_SEQ);
return qcrypto_der_decode_tlv(tag, data, dlen, cb, ctx, errp);
}
int qcrypto_der_decode_octet_str(const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb, void *ctx, Error **errp)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_PRIM,
QCRYPTO_DER_TYPE_TAG_OCT_STR);
return qcrypto_der_decode_tlv(tag, data, dlen, cb, ctx, errp);
}
int qcrypto_der_decode_bit_str(const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb, void *ctx, Error **errp)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_PRIM,
QCRYPTO_DER_TYPE_TAG_BIT_STR);
return qcrypto_der_decode_tlv(tag, data, dlen, cb, ctx, errp);
}
int qcrypto_der_decode_oid(const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb, void *ctx, Error **errp)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_PRIM,
QCRYPTO_DER_TYPE_TAG_OID);
return qcrypto_der_decode_tlv(tag, data, dlen, cb, ctx, errp);
}
int qcrypto_der_decode_ctx_tag(const uint8_t **data, size_t *dlen, int tag_id,
QCryptoDERDecodeCb cb, void *ctx, Error **errp)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_CONT,
QCRYPTO_DER_TAG_ENC_CONS,
tag_id);
return qcrypto_der_decode_tlv(tag, data, dlen, cb, ctx, errp);
}
static void qcrypto_der_encode_prim(QCryptoEncodeContext *ctx, uint8_t tag,
const uint8_t *data, size_t dlen)
{
QCryptoDerEncodeNode *node = g_new0(QCryptoDerEncodeNode, 1);
size_t nbytes_len;
node->tag = tag;
node->data = data;
node->dlen = dlen;
node->parent = ctx->current_parent;
qcrypto_der_encode_length(dlen, NULL, &nbytes_len);
/* 1 byte for Tag, nbyte_len for Length, and dlen for Value */
node->parent->dlen += 1 + nbytes_len + dlen;
ctx->tail->next = node;
ctx->tail = node;
}
QCryptoEncodeContext *qcrypto_der_encode_ctx_new(void)
{
QCryptoEncodeContext *ctx = g_new0(QCryptoEncodeContext, 1);
ctx->current_parent = &ctx->root;
ctx->tail = &ctx->root;
return ctx;
}
static void qcrypto_der_encode_cons_begin(QCryptoEncodeContext *ctx,
uint8_t tag)
{
QCryptoDerEncodeNode *node = g_new0(QCryptoDerEncodeNode, 1);
node->tag = tag;
node->parent = ctx->current_parent;
ctx->current_parent = node;
ctx->tail->next = node;
ctx->tail = node;
}
static void qcrypto_der_encode_cons_end(QCryptoEncodeContext *ctx)
{
QCryptoDerEncodeNode *cons_node = ctx->current_parent;
size_t nbytes_len;
qcrypto_der_encode_length(cons_node->dlen, NULL, &nbytes_len);
/* 1 byte for Tag, nbyte_len for Length, and dlen for Value */
cons_node->parent->dlen += 1 + nbytes_len + cons_node->dlen;
ctx->current_parent = cons_node->parent;
}
void qcrypto_der_encode_seq_begin(QCryptoEncodeContext *ctx)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_CONS,
QCRYPTO_DER_TYPE_TAG_SEQ);
qcrypto_der_encode_cons_begin(ctx, tag);
}
void qcrypto_der_encode_seq_end(QCryptoEncodeContext *ctx)
{
qcrypto_der_encode_cons_end(ctx);
}
void qcrypto_der_encode_oid(QCryptoEncodeContext *ctx,
const uint8_t *src, size_t src_len)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_PRIM,
QCRYPTO_DER_TYPE_TAG_OID);
qcrypto_der_encode_prim(ctx, tag, src, src_len);
}
void qcrypto_der_encode_int(QCryptoEncodeContext *ctx,
const uint8_t *src, size_t src_len)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_PRIM,
QCRYPTO_DER_TYPE_TAG_INT);
qcrypto_der_encode_prim(ctx, tag, src, src_len);
}
void qcrypto_der_encode_null(QCryptoEncodeContext *ctx)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_PRIM,
QCRYPTO_DER_TYPE_TAG_NULL);
qcrypto_der_encode_prim(ctx, tag, NULL, 0);
}
void qcrypto_der_encode_octet_str(QCryptoEncodeContext *ctx,
const uint8_t *src, size_t src_len)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_PRIM,
QCRYPTO_DER_TYPE_TAG_OCT_STR);
qcrypto_der_encode_prim(ctx, tag, src, src_len);
}
void qcrypto_der_encode_octet_str_begin(QCryptoEncodeContext *ctx)
{
uint8_t tag = QCRYPTO_DER_TAG(QCRYPTO_DER_TAG_CLASS_UNIV,
QCRYPTO_DER_TAG_ENC_PRIM,
QCRYPTO_DER_TYPE_TAG_OCT_STR);
qcrypto_der_encode_cons_begin(ctx, tag);
}
void qcrypto_der_encode_octet_str_end(QCryptoEncodeContext *ctx)
{
qcrypto_der_encode_cons_end(ctx);
}
size_t qcrypto_der_encode_ctx_buffer_len(QCryptoEncodeContext *ctx)
{
return ctx->root.dlen;
}
void qcrypto_der_encode_ctx_flush_and_free(QCryptoEncodeContext *ctx,
uint8_t *dst)
{
QCryptoDerEncodeNode *node, *prev;
size_t len;
for (prev = &ctx->root;
(node = prev->next) && (prev->next = node->next, 1);) {
/* Tag */
*dst++ = node->tag;
/* Length */
qcrypto_der_encode_length(node->dlen, dst, &len);
dst += len;
/* Value */
if (node->data) {
memcpy(dst, node->data, node->dlen);
dst += node->dlen;
}
g_free(node);
}
g_free(ctx);
}

211
crypto/der.h
View File

@ -22,6 +22,11 @@
#include "qapi/error.h"
typedef struct QCryptoEncodeContext QCryptoEncodeContext;
/* rsaEncryption: 1.2.840.113549.1.1.1 */
#define QCRYPTO_OID_rsaEncryption "\x2A\x86\x48\x86\xF7\x0D\x01\x01\x01"
/* Simple decoder used to parse DER encoded rsa keys. */
/**
@ -47,14 +52,13 @@ typedef int (*QCryptoDERDecodeCb) (void *opaque, const uint8_t *value,
* will be set to the rest length of data, if cb is not NULL, must
* return 0 to make decode success, at last, the length of the data
* part of the decoded INTEGER will be returned. Otherwise, -1 is
* returned.
* returned and the valued of *data and *dlen keep unchanged.
*/
int qcrypto_der_decode_int(const uint8_t **data,
size_t *dlen,
QCryptoDERDecodeCb cb,
void *opaque,
Error **errp);
/**
* qcrypto_der_decode_seq:
*
@ -70,7 +74,7 @@ int qcrypto_der_decode_int(const uint8_t **data,
* will be set to the rest length of data, if cb is not NULL, must
* return 0 to make decode success, at last, the length of the data
* part of the decoded SEQUENCE will be returned. Otherwise, -1 is
* returned.
* returned and the valued of *data and *dlen keep unchanged.
*/
int qcrypto_der_decode_seq(const uint8_t **data,
size_t *dlen,
@ -78,4 +82,205 @@ int qcrypto_der_decode_seq(const uint8_t **data,
void *opaque,
Error **errp);
/**
* qcrypto_der_decode_oid:
*
* Decode OID from DER-encoded data, similar with der_decode_int.
*
* @data: pointer to address of input data
* @dlen: pointer to length of input data
* @cb: callback invoked when decode succeed, if cb equals NULL, no
* callback will be invoked
* @opaque: parameter passed to cb
*
* Returns: On success, *data points to rest data, and *dlen
* will be set to the rest length of data, if cb is not NULL, must
* return 0 to make decode success, at last, the length of the data
* part of the decoded OID will be returned. Otherwise, -1 is
* returned and the valued of *data and *dlen keep unchanged.
*/
int qcrypto_der_decode_oid(const uint8_t **data,
size_t *dlen,
QCryptoDERDecodeCb cb,
void *opaque,
Error **errp);
/**
* qcrypto_der_decode_octet_str:
*
* Decode OCTET STRING from DER-encoded data, similar with der_decode_int.
*
* @data: pointer to address of input data
* @dlen: pointer to length of input data
* @cb: callback invoked when decode succeed, if cb equals NULL, no
* callback will be invoked
* @opaque: parameter passed to cb
*
* Returns: On success, *data points to rest data, and *dlen
* will be set to the rest length of data, if cb is not NULL, must
* return 0 to make decode success, at last, the length of the data
* part of the decoded OCTET STRING will be returned. Otherwise, -1 is
* returned and the valued of *data and *dlen keep unchanged.
*/
int qcrypto_der_decode_octet_str(const uint8_t **data,
size_t *dlen,
QCryptoDERDecodeCb cb,
void *opaque,
Error **errp);
/**
* qcrypto_der_decode_bit_str:
*
* Decode BIT STRING from DER-encoded data, similar with der_decode_int.
*
* @data: pointer to address of input data
* @dlen: pointer to length of input data
* @cb: callback invoked when decode succeed, if cb equals NULL, no
* callback will be invoked
* @opaque: parameter passed to cb
*
* Returns: On success, *data points to rest data, and *dlen
* will be set to the rest length of data, if cb is not NULL, must
* return 0 to make decode success, at last, the length of the data
* part of the decoded BIT STRING will be returned. Otherwise, -1 is
* returned and the valued of *data and *dlen keep unchanged.
*/
int qcrypto_der_decode_bit_str(const uint8_t **data,
size_t *dlen,
QCryptoDERDecodeCb cb,
void *opaque,
Error **errp);
/**
* qcrypto_der_decode_ctx_tag:
*
* Decode context specific tag
*
* @data: pointer to address of input data
* @dlen: pointer to length of input data
* @tag: expected value of context specific tag
* @cb: callback invoked when decode succeed, if cb equals NULL, no
* callback will be invoked
* @opaque: parameter passed to cb
*
* Returns: On success, *data points to rest data, and *dlen
* will be set to the rest length of data, if cb is not NULL, must
* return 0 to make decode success, at last, the length of the data
* part of the decoded BIT STRING will be returned. Otherwise, -1 is
* returned and the valued of *data and *dlen keep unchanged.
*/
int qcrypto_der_decode_ctx_tag(const uint8_t **data,
size_t *dlen, int tag_id,
QCryptoDERDecodeCb cb,
void *opaque,
Error **errp);
/**
* qcrypto_der_encode_ctx_new:
*
* Allocate a context used for der encoding.
*/
QCryptoEncodeContext *qcrypto_der_encode_ctx_new(void);
/**
* qcrypto_der_encode_seq_begin:
* @ctx: the encode context.
*
* Start encoding a SEQUENCE for ctx.
*
*/
void qcrypto_der_encode_seq_begin(QCryptoEncodeContext *ctx);
/**
* qcrypto_der_encode_seq_begin:
* @ctx: the encode context.
*
* Finish uencoding a SEQUENCE for ctx.
*
*/
void qcrypto_der_encode_seq_end(QCryptoEncodeContext *ctx);
/**
* qcrypto_der_encode_oid:
* @ctx: the encode context.
* @src: the source data of oid, note it should be already encoded, this
* function only add tag and length part for it.
*
* Encode an oid into ctx.
*/
void qcrypto_der_encode_oid(QCryptoEncodeContext *ctx,
const uint8_t *src, size_t src_len);
/**
* qcrypto_der_encode_int:
* @ctx: the encode context.
* @src: the source data of integer, note it should be already encoded, this
* function only add tag and length part for it.
*
* Encode an integer into ctx.
*/
void qcrypto_der_encode_int(QCryptoEncodeContext *ctx,
const uint8_t *src, size_t src_len);
/**
* qcrypto_der_encode_null:
* @ctx: the encode context.
*
* Encode a null into ctx.
*/
void qcrypto_der_encode_null(QCryptoEncodeContext *ctx);
/**
* qcrypto_der_encode_octet_str:
* @ctx: the encode context.
* @src: the source data of the octet string.
*
* Encode a octet string into ctx.
*/
void qcrypto_der_encode_octet_str(QCryptoEncodeContext *ctx,
const uint8_t *src, size_t src_len);
/**
* qcrypto_der_encode_octet_str_begin:
* @ctx: the encode context.
*
* Start encoding a octet string, All fields between
* qcrypto_der_encode_octet_str_begin and qcrypto_der_encode_octet_str_end
* are encoded as an octet string. This is useful when we need to encode a
* encoded SEQUNCE as OCTET STRING.
*/
void qcrypto_der_encode_octet_str_begin(QCryptoEncodeContext *ctx);
/**
* qcrypto_der_encode_octet_str_end:
* @ctx: the encode context.
*
* Finish encoding a octet string, All fields between
* qcrypto_der_encode_octet_str_begin and qcrypto_der_encode_octet_str_end
* are encoded as an octet string. This is useful when we need to encode a
* encoded SEQUNCE as OCTET STRING.
*/
void qcrypto_der_encode_octet_str_end(QCryptoEncodeContext *ctx);
/**
* qcrypto_der_encode_ctx_buffer_len:
* @ctx: the encode context.
*
* Compute the expected buffer size to save all encoded things.
*/
size_t qcrypto_der_encode_ctx_buffer_len(QCryptoEncodeContext *ctx);
/**
* qcrypto_der_encode_ctx_flush_and_free:
* @ctx: the encode context.
* @dst: the distination to save the encoded data, the length of dst should
* not less than qcrypto_der_encode_cxt_buffer_len
*
* Flush all encoded data into dst, then free ctx.
*/
void qcrypto_der_encode_ctx_flush_and_free(QCryptoEncodeContext *ctx,
uint8_t *dst);
#endif /* QCRYPTO_ASN1_DECODER_H */

126
tests/unit/test-crypto-der.c
View File

@ -147,13 +147,58 @@ static const uint8_t test_rsa2048_priv_key[] =
"\x4e\x2f\x4c\xf9\xab\x97\x38\xe4\x20\x32\x32\x96\xc8\x9e\x79\xd3"
"\x12";
static const uint8_t test_ecdsa_p192_priv_key[] =
"\x30\x53" /* SEQUENCE, offset 0, length 83 */
"\x02\x01\x01" /* INTEGER, offset 2, length 1 */
"\x04\x18" /* OCTET STRING, offset 5, length 24 */
"\xcb\xc8\x86\x0e\x66\x3c\xf7\x5a\x44\x13\xb8\xef\xea\x1d\x7b\xa6"
"\x1c\xda\xf4\x1b\xc7\x67\x6b\x35"
"\xa1\x34" /* CONTEXT SPECIFIC 1, offset 31, length 52 */
"\x03\x32" /* BIT STRING, offset 33, length 50 */
"\x00\x04\xc4\x16\xb3\xff\xac\xd5\x87\x98\xf7\xd9\x45\xfe\xd3\x5c"
"\x17\x9d\xb2\x36\x22\xcc\x07\xb3\x6d\x3c\x4e\x04\x5f\xeb\xb6\x52"
"\x58\xfb\x36\x10\x52\xb7\x01\x62\x0e\x94\x51\x1d\xe2\xef\x10\x82"
"\x88\x78";
static const uint8_t test_ecdsa_p256_priv_key[] =
"\x30\x77" /* SEQUENCE, offset 0, length 119 */
"\x02\x01\x01" /* INTEGER, offset 2, length 1 */
"\x04\x20" /* OCTET STRING, offset 5, length 32 */
"\xf6\x92\xdd\x29\x1c\x6e\xef\xb6\xb2\x73\x9f\x40\x1b\xb3\x2a\x28"
"\xd2\x37\xd6\x4a\x5b\xe4\x40\x4c\x6a\x95\x99\xfa\xf7\x92\x49\xbe"
"\xa0\x0a" /* CONTEXT SPECIFIC 0, offset 39, length 10 */
"\x06\x08" /* OID, offset 41, length 8 */
"\x2a\x86\x48\xce\x3d\x03\x01\x07"
"\xa1\x44" /* CONTEXT SPECIFIC 1, offset 51, length 68 */
"\x03\x42" /* BIT STRING, offset 53, length 66 */
"\x00\x04\xed\x42\x9c\x67\x79\xbe\x46\x83\x88\x3e\x8c\xc1\x33\xf3"
"\xc3\xf6\x2c\xf3\x13\x6a\x00\xc2\xc9\x3e\x87\x7f\x86\x39\xe6\xae"
"\xe3\xb9\xba\x2f\x58\x63\x32\x62\x62\x54\x07\x27\xf9\x5a\x3a\xc7"
"\x3a\x6b\x5b\xbc\x0d\x33\xba\xbb\xd4\xa3\xff\x4f\x9e\xdd\xf5\x59"
"\xc0\xf6";
#define MAX_CHECKER_COUNT 32
static int qcrypto_wrapped_decode_ctx_tag0(const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb, void *opaque,
Error **errp)
{
return qcrypto_der_decode_ctx_tag(data, dlen, 0, cb, opaque, errp);
}
static int qcrypto_wrapped_decode_ctx_tag1(const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb, void *opaque,
Error **errp)
{
return qcrypto_der_decode_ctx_tag(data, dlen, 1, cb, opaque, errp);
}
typedef struct QCryptoAns1DecoderResultChecker QCryptoAns1DecoderResultChecker;
struct QCryptoAns1DecoderResultChecker {
int (*action) (const uint8_t **data, size_t *dlen,
QCryptoDERDecodeCb cb, void *opaque, Error **errp);
QCryptoDERDecodeCb cb;
bool constructed;
const uint8_t *exp_value;
size_t exp_vlen;
};
@ -204,7 +249,7 @@ static void test_ans1(const void *opaque)
g_assert(checker->action(&c->data, &c->dlen, checker_callback,
(void *)checker, &error_abort)
== checker->exp_vlen);
if (checker->action == qcrypto_der_decode_seq) {
if (checker->constructed) {
++seq_depth;
ctx[seq_depth].data = checker->exp_value;
ctx[seq_depth].dlen = checker->exp_vlen;
@ -225,25 +270,25 @@ static QCryptoAns1DecoderTestData test_data[] = {
.test_data = test_rsa512_priv_key,
.test_data_len = sizeof(test_rsa512_priv_key) - 1,
.checker = {
{ qcrypto_der_decode_seq, checker_callback,
{ qcrypto_der_decode_seq, checker_callback, true,
test_rsa512_priv_key + 4, 313 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa512_priv_key + 4 + 2, 1 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa512_priv_key + 7 + 2, 65 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa512_priv_key + 74 + 2, 3 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa512_priv_key + 79 + 2, 64 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa512_priv_key + 145 + 2, 33 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa512_priv_key + 180 + 2, 33 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa512_priv_key + 215 + 2, 32 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa512_priv_key + 249 + 2, 32 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa512_priv_key + 283 + 2, 32 },
},
},
@ -252,29 +297,66 @@ static QCryptoAns1DecoderTestData test_data[] = {
.test_data = test_rsa2048_priv_key,
.test_data_len = sizeof(test_rsa2048_priv_key) - 1,
.checker = {
{ qcrypto_der_decode_seq, checker_callback,
{ qcrypto_der_decode_seq, checker_callback, true,
test_rsa2048_priv_key + 4, 1190 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa2048_priv_key + 4 + 2, 1 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa2048_priv_key + 7 + 4, 257 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa2048_priv_key + 268 + 2, 3 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa2048_priv_key + 273 + 4, 257 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa2048_priv_key + 534 + 3, 129 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa2048_priv_key + 666 + 3, 129 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa2048_priv_key + 798 + 3, 129 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa2048_priv_key + 930 + 3, 129 },
{ qcrypto_der_decode_int, checker_callback,
{ qcrypto_der_decode_int, checker_callback, false,
test_rsa2048_priv_key + 1062 + 3, 129 },
},
},
{
.path = "/crypto/der/parse-ecdsa-p192-priv-key",
.test_data = test_ecdsa_p192_priv_key,
.test_data_len = sizeof(test_ecdsa_p192_priv_key) - 1,
.checker = {
{ qcrypto_der_decode_seq, checker_callback, true,
test_ecdsa_p192_priv_key + 2, 83 },
{ qcrypto_der_decode_int, checker_callback, false,
test_ecdsa_p192_priv_key + 2 + 2, 1 },
{ qcrypto_der_decode_octet_str, checker_callback, false,
test_ecdsa_p192_priv_key + 5 + 2, 24 },
{ qcrypto_wrapped_decode_ctx_tag1, checker_callback, true,
test_ecdsa_p192_priv_key + 31 + 2, 52 },
{ qcrypto_der_decode_bit_str , checker_callback, false,
test_ecdsa_p192_priv_key + 33 + 2, 50 },
},
},
{
.path = "/crypto/der/parse-ecdsa-p256-priv-key",
.test_data = test_ecdsa_p256_priv_key,
.test_data_len = sizeof(test_ecdsa_p256_priv_key) - 1,
.checker = {
{ qcrypto_der_decode_seq, checker_callback, true,
test_ecdsa_p256_priv_key + 2, 119 },
{ qcrypto_der_decode_int, checker_callback, false,
test_ecdsa_p256_priv_key + 2 + 2, 1 },
{ qcrypto_der_decode_octet_str, checker_callback, false,
test_ecdsa_p256_priv_key + 5 + 2, 32 },
{ qcrypto_wrapped_decode_ctx_tag0, checker_callback, true,
test_ecdsa_p256_priv_key + 39 + 2, 10 },
{ qcrypto_der_decode_oid, checker_callback, false,
test_ecdsa_p256_priv_key + 41 + 2, 8 },
{ qcrypto_wrapped_decode_ctx_tag1, checker_callback, true,
test_ecdsa_p256_priv_key + 51 + 2, 68 },
{ qcrypto_der_decode_bit_str , checker_callback, false,
test_ecdsa_p256_priv_key + 53 + 2, 66 },
},
},
};
int main(int argc, char **argv)