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Fix an incorrect error code addition in pk_parse_key_pkcs8_unencrypted_der

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An incorrect error code addition was spotted by the new invasive testing
infrastructure whereby pk_get_pk_alg will always return a high level
error or zero and pk_parse_key_pkcs8_unencrypted_der will try to add
another high level error, resulting in a garbage error code.

Signed-off-by: Chris Jones <christopher.jones@arm.com>
Signed-off-by: Gilles Peskine <gilles.peskine@arm.com>
This commit is contained in:
Chris Jones 2021-04-14 18:15:24 +01:00 • committed by Gilles Peskine
parent 21dab7aee6
commit 531aede488
2 changed files with 3 additions and 1 deletions
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2
ChangeLog.d/fix-pk-parse-key-error-code.txt Normal file
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@ -0,0 +1,2 @@
Bugfix
* Fix an incorrect error code when parsing a PKCS#8 private key.

2
library/pkparse.c
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@ -1070,7 +1070,7 @@ static int pk_parse_key_pkcs8_unencrypted_der(
return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION + ret ); return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION + ret );
if( ( ret = pk_get_pk_alg( &p, end, &pk_alg, &params ) ) != 0 ) if( ( ret = pk_get_pk_alg( &p, end, &pk_alg, &params ) ) != 0 )
return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret ); return( ret );
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ) if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret ); return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );