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X.509: x509write_crt_set_key_identifier created

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Function mbedtls_x509write_crt_set_key_identifier
was implemented to provide functionality of both
mbedtls_x509write_crt_set_authority_key_identifier
and
mbedtls_x509write_crt_set_subject_key_identifier.

Signed-off-by: pespacek <peter.spacek@silabs.com>
This commit is contained in:
pespacek 2022-02-14 15:20:57 +01:00
parent a7a646986f
commit a6e955e729
1 changed files with 59 additions and 61 deletions
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120
library/x509write_crt.c
View file

@ -172,68 +172,36 @@ int mbedtls_x509write_crt_set_basic_constraints( mbedtls_x509write_cert *ctx,
}
#if defined(MBEDTLS_SHA1_C)
int mbedtls_x509write_crt_set_subject_key_identifier( mbedtls_x509write_cert *ctx )
static int mbedtls_x509write_crt_set_key_identifier( mbedtls_x509write_cert
*ctx,
int is_ca,
unsigned char tag )
{
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
size_t hash_length;
#endif /* MBEDTLS_USE_PSA_CRYPTO */
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char buf[MBEDTLS_MPI_MAX_SIZE * 2 + 20]; /* tag, length + 2xMPI */
unsigned char *c = buf + sizeof(buf);
size_t len = 0;
memset( buf, 0, sizeof(buf) );
MBEDTLS_ASN1_CHK_ADD( len,
mbedtls_pk_write_pubkey( &c, buf, ctx->subject_key ) );
#if defined(MBEDTLS_USE_PSA_CRYPTO)
status = psa_hash_compute( PSA_ALG_SHA_1,
buf + sizeof( buf ) - len,
len,
buf + sizeof( buf ) - 20 ,
PSA_HASH_LENGTH(PSA_ALG_SHA_1),
&hash_length );
if( status != PSA_SUCCESS )
{
return( MBEDTLS_ERR_ERROR_GENERIC_ERROR );
}
#else
ret = mbedtls_sha1( buf + sizeof( buf ) - len, len,
buf + sizeof( buf ) - 20 );
if( ret != 0 )
return( ret );
#endif /* MBEDTLS_USE_PSA_CRYPTO */
c = buf + sizeof( buf ) - 20;
len = 20;
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len,
mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_OCTET_STRING ) );
return mbedtls_x509write_crt_set_extension( ctx,
MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER,
MBEDTLS_OID_SIZE( MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER ),
0, buf + sizeof(buf) - len, len );
}
int mbedtls_x509write_crt_set_authority_key_identifier( mbedtls_x509write_cert *ctx )
{
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
size_t hash_length;
#endif /* MBEDTLS_USE_PSA_CRYPTO */
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char buf[MBEDTLS_MPI_MAX_SIZE * 2 + 20]; /* tag, length + 2xMPI */
unsigned char *c = buf + sizeof( buf );
size_t len = 0;
memset( buf, 0, sizeof(buf) );
MBEDTLS_ASN1_CHK_ADD( len,
mbedtls_pk_write_pubkey( &c, buf, ctx->issuer_key ) );
if( is_ca )
{
MBEDTLS_ASN1_CHK_ADD( len,
mbedtls_pk_write_pubkey( &c,
buf,
ctx->issuer_key ) );
}
else
{
MBEDTLS_ASN1_CHK_ADD( len,
mbedtls_pk_write_pubkey( &c,
buf,
ctx->subject_key ) );
}
#if defined(MBEDTLS_USE_PSA_CRYPTO)
status = psa_hash_compute( PSA_ALG_SHA_1,
buf + sizeof(buf) - len,
@ -257,18 +225,48 @@ int mbedtls_x509write_crt_set_authority_key_identifier( mbedtls_x509write_cert *
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len,
mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC | 0 ) );
mbedtls_asn1_write_tag( &c, buf, tag ) );
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) );
MBEDTLS_ASN1_CHK_ADD( len,
mbedtls_asn1_write_tag( &c, buf,
MBEDTLS_ASN1_CONSTRUCTED |
MBEDTLS_ASN1_SEQUENCE ) );
if( is_ca ) // writes AuthorityKeyIdentifier sequence
{
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ));
MBEDTLS_ASN1_CHK_ADD( len,
mbedtls_asn1_write_tag( &c,
buf,
MBEDTLS_ASN1_CONSTRUCTED |
MBEDTLS_ASN1_SEQUENCE ) );
return mbedtls_x509write_crt_set_extension(
ctx,
MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER,
MBEDTLS_OID_SIZE( MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER ),
0,
buf + sizeof( buf ) - len,
len );
}
else
{
return mbedtls_x509write_crt_set_extension(
ctx,
MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER,
MBEDTLS_OID_SIZE( MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER ),
0,
buf + sizeof( buf ) - len,
len );
}
}
return mbedtls_x509write_crt_set_extension(
ctx, MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER,
MBEDTLS_OID_SIZE( MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER ),
0, buf + sizeof( buf ) - len, len );
int mbedtls_x509write_crt_set_subject_key_identifier( mbedtls_x509write_cert *ctx )
{
return mbedtls_x509write_crt_set_key_identifier( ctx,
0,
MBEDTLS_ASN1_OCTET_STRING );
}
int mbedtls_x509write_crt_set_authority_key_identifier( mbedtls_x509write_cert *ctx )
{
return mbedtls_x509write_crt_set_key_identifier( ctx,
1,
(MBEDTLS_ASN1_CONTEXT_SPECIFIC | 0) );
}
#endif /* MBEDTLS_SHA1_C */