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Merge EC & RSA versions of parse_pkcs8_unencrypted

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Manuel Pégourié-Gonnard 2013-07-11 14:55:43 +02:00 committed by Paul Bakker
parent a2d4e644ac
commit 6e88202a95
1 changed files with 182 additions and 222 deletions
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404
library/x509parse.c
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@ -2237,38 +2237,31 @@ static int x509parse_key_pkcs1_der( rsa_context *rsa,
return( 0 ); return( 0 );
} }
/* /*
* Parse an unencrypted PKCS#8 encoded private RSA key * Parse a SEC1 encoded private EC key
*/ */
static int x509parse_key_pkcs8_unencrypted_der( static int x509parse_key_sec1_der( ecp_keypair *eck,
rsa_context *rsa, const unsigned char *key,
const unsigned char *key, size_t keylen )
size_t keylen )
{ {
int ret; int ret;
int version;
size_t len; size_t len;
unsigned char *p, *end; x509_buf params;
x509_buf alg_params; unsigned char *p = (unsigned char *) key;
pk_type_t pk_alg = POLARSSL_PK_NONE; unsigned char *end = p + keylen;
unsigned char *end2;
p = (unsigned char *) key;
end = p + keylen;
/* /*
* This function parses the PrivatKeyInfo object (PKCS#8) * RFC 5915, orf SEC1 Appendix C.4
* *
* PrivateKeyInfo ::= SEQUENCE { * ECPrivateKey ::= SEQUENCE {
* version Version, * version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
* algorithm AlgorithmIdentifier, * privateKey OCTET STRING,
* PrivateKey BIT STRING * parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
* } * publicKey [1] BIT STRING OPTIONAL
* * }
* AlgorithmIdentifier ::= SEQUENCE {
* algorithm OBJECT IDENTIFIER,
* parameters ANY DEFINED BY algorithm OPTIONAL
* }
*
* The PrivateKey BIT STRING is a PKCS#1 RSAPrivateKey
*/ */
if( ( ret = asn1_get_tag( &p, end, &len, if( ( ret = asn1_get_tag( &p, end, &len,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
@ -2278,39 +2271,172 @@ static int x509parse_key_pkcs8_unencrypted_der(
end = p + len; end = p + len;
if( ( ret = asn1_get_int( &p, end, &rsa->ver ) ) != 0 ) if( ( ret = asn1_get_int( &p, end, &version ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret ); return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( rsa->ver != 0 ) if( version != 1 )
return( POLARSSL_ERR_X509_KEY_INVALID_VERSION + ret ); return( POLARSSL_ERR_X509_KEY_INVALID_VERSION );
if( ( ret = x509_get_pk_alg( &p, end, &pk_alg, &alg_params ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
/*
* We explicitly want RSA keys only
*/
if (pk_alg != POLARSSL_PK_RSA )
return( POLARSSL_ERR_X509_CERT_INVALID_ALG );
/*
* Get the OCTET STRING and parse the PKCS#1 format inside
*/
if( ( ret = asn1_get_tag( &p, end, &len, ASN1_OCTET_STRING ) ) != 0 ) if( ( ret = asn1_get_tag( &p, end, &len, ASN1_OCTET_STRING ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret ); return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( ( end - p ) < 1 ) if( ( ret = mpi_read_binary( &eck->d, p, len ) ) != 0 )
{ {
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ecp_keypair_free( eck );
POLARSSL_ERR_ASN1_OUT_OF_DATA ); return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
}
p += len;
/*
* Is 'parameters' present?
*/
if( ( ret = asn1_get_tag( &p, end, &len,
ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 0 ) ) == 0 )
{
if( ( ret = x509_get_ecparams( &p, p + len, &params) ) != 0 ||
( ret = x509_use_ecparams( &params, &eck->grp ) ) != 0 )
{
ecp_keypair_free( eck );
return( ret );
}
}
else if( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG )
{
ecp_keypair_free( eck );
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
}
/*
* Is 'publickey' present?
*/
if( ( ret = asn1_get_tag( &p, end, &len,
ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 1 ) ) == 0 )
{
end2 = p + len;
if( ( ret = asn1_get_bitstring_null( &p, end2, &len ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( p + len != end2 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT +
POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
if( ( ret = x509_get_ecpubkey( &p, end2, eck ) ) != 0 )
return( ret );
}
else if ( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG )
{
ecp_keypair_free( eck );
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
}
if( ( ret = ecp_check_privkey( &eck->grp, &eck->d ) ) != 0 )
{
ecp_keypair_free( eck );
return( ret );
}
return 0;
}
/*
* Parse an unencrypted PKCS#8 encoded private key
*/
static int x509parse_key_pkcs8_unencrypted_der(
pk_context *pk,
const unsigned char* key,
size_t keylen )
{
int ret, version;
size_t len;
x509_buf params;
unsigned char *p = (unsigned char *) key;
unsigned char *end = p + keylen;
pk_type_t pk_alg = POLARSSL_PK_NONE;
/*
* This function parses the PrivatKeyInfo object (PKCS#8 v1.2 = RFC 5208)
*
* PrivateKeyInfo ::= SEQUENCE {
* version Version,
* privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
* privateKey PrivateKey,
* attributes [0] IMPLICIT Attributes OPTIONAL }
*
* Version ::= INTEGER
* PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
* PrivateKey ::= OCTET STRING
*
* The PrivateKey OCTET STRING is a SEC1 ECPrivateKey
*/
if( ( ret = asn1_get_tag( &p, end, &len,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
{
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
} }
end = p + len; end = p + len;
if( ( ret = x509parse_key_pkcs1_der( rsa, p, end - p ) ) != 0 ) if( ( ret = asn1_get_int( &p, end, &version ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( version != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_VERSION + ret );
if( ( ret = x509_get_pk_alg( &p, end, &pk_alg, &params ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( ( ret = asn1_get_tag( &p, end, &len, ASN1_OCTET_STRING ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( len < 1 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT +
POLARSSL_ERR_ASN1_OUT_OF_DATA );
if( ( ret = pk_set_type( pk, pk_alg ) ) != 0 )
return( ret ); return( ret );
return( 0 ); if( pk_alg == POLARSSL_PK_ECKEY || pk_alg == POLARSSL_PK_ECKEY_DH )
{
if( pk_alg == POLARSSL_PK_ECKEY_DH )
pk_ec( *pk )->alg = POLARSSL_ECP_KEY_ALG_ECDH;
if( ( ret = x509_use_ecparams( &params, &pk_ec( *pk )->grp ) ) != 0 ||
( ret = x509parse_key_sec1_der( pk_ec( *pk ), p, len ) ) != 0 )
{
pk_free( pk );
return( ret );
}
} else
if( pk_alg == POLARSSL_PK_RSA )
{
if( ( ret = x509parse_key_pkcs1_der( pk_rsa( *pk ), p, len ) ) != 0 )
{
pk_free( pk );
return( ret );
}
} else
return( POLARSSL_ERR_X509_UNKNOWN_PK_ALG );
return 0;
}
/*
* Parse an unencrypted PKCS#8 encoded private RSA key
*/
static int x509parse_key_pkcs8_unencrypted_der_rsa(
rsa_context *rsa,
const unsigned char *key,
size_t keylen )
{
pk_context pk;
pk_init( &pk );
pk_wrap_rsa( &pk, rsa );
return( x509parse_key_pkcs8_unencrypted_der( &pk, key, keylen ) );
} }
/* /*
@ -2426,7 +2552,7 @@ static int x509parse_pkcs8_decrypt( unsigned char *buf, size_t buflen,
/* /*
* Parse an encrypted PKCS#8 encoded private RSA key * Parse an encrypted PKCS#8 encoded private RSA key
*/ */
static int x509parse_key_pkcs8_encrypted_der( static int x509parse_key_pkcs8_encrypted_der_rsa(
rsa_context *rsa, rsa_context *rsa,
const unsigned char *key, size_t keylen, const unsigned char *key, size_t keylen,
const unsigned char *pwd, size_t pwdlen ) const unsigned char *pwd, size_t pwdlen )
@ -2441,7 +2567,7 @@ static int x509parse_key_pkcs8_encrypted_der(
return( ret ); return( ret );
} }
return( x509parse_key_pkcs8_unencrypted_der( rsa, buf, len ) ); return( x509parse_key_pkcs8_unencrypted_der_rsa( rsa, buf, len ) );
} }
/* /*
@ -2485,7 +2611,7 @@ int x509parse_key_rsa( rsa_context *rsa,
key, NULL, 0, &len ); key, NULL, 0, &len );
if( ret == 0 ) if( ret == 0 )
{ {
if( ( ret = x509parse_key_pkcs8_unencrypted_der( rsa, if( ( ret = x509parse_key_pkcs8_unencrypted_der_rsa( rsa,
pem.buf, pem.buflen ) ) != 0 ) pem.buf, pem.buflen ) ) != 0 )
{ {
rsa_free( rsa ); rsa_free( rsa );
@ -2503,7 +2629,7 @@ int x509parse_key_rsa( rsa_context *rsa,
key, NULL, 0, &len ); key, NULL, 0, &len );
if( ret == 0 ) if( ret == 0 )
{ {
if( ( ret = x509parse_key_pkcs8_encrypted_der( rsa, if( ( ret = x509parse_key_pkcs8_encrypted_der_rsa( rsa,
pem.buf, pem.buflen, pem.buf, pem.buflen,
pwd, pwdlen ) ) != 0 ) pwd, pwdlen ) ) != 0 )
{ {
@ -2527,7 +2653,7 @@ int x509parse_key_rsa( rsa_context *rsa,
* We try the different DER format parsers to see if one passes without * We try the different DER format parsers to see if one passes without
* error * error
*/ */
if( ( ret = x509parse_key_pkcs8_encrypted_der( rsa, key, keylen, if( ( ret = x509parse_key_pkcs8_encrypted_der_rsa( rsa, key, keylen,
pwd, pwdlen ) ) == 0 ) pwd, pwdlen ) ) == 0 )
{ {
return( 0 ); return( 0 );
@ -2540,7 +2666,7 @@ int x509parse_key_rsa( rsa_context *rsa,
return( ret ); return( ret );
} }
if( ( ret = x509parse_key_pkcs8_unencrypted_der( rsa, key, keylen ) ) == 0 ) if( ( ret = x509parse_key_pkcs8_unencrypted_der_rsa( rsa, key, keylen ) ) == 0 )
return( 0 ); return( 0 );
rsa_free( rsa ); rsa_free( rsa );
@ -2568,187 +2694,21 @@ int x509parse_public_key_rsa( rsa_context *rsa,
} }
#if defined(POLARSSL_ECP_C) #if defined(POLARSSL_ECP_C)
/*
* Parse a SEC1 encoded private EC key
*/
static int x509parse_key_sec1_der( ecp_keypair *eck,
const unsigned char *key,
size_t keylen )
{
int ret;
int version;
size_t len;
x509_buf params;
unsigned char *p = (unsigned char *) key;
unsigned char *end = p + keylen;
unsigned char *end2;
/*
* RFC 5915, orf SEC1 Appendix C.4
*
* ECPrivateKey ::= SEQUENCE {
* version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
* privateKey OCTET STRING,
* parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
* publicKey [1] BIT STRING OPTIONAL
* }
*/
if( ( ret = asn1_get_tag( &p, end, &len,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
{
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
}
end = p + len;
if( ( ret = asn1_get_int( &p, end, &version ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( version != 1 )
return( POLARSSL_ERR_X509_KEY_INVALID_VERSION );
if( ( ret = asn1_get_tag( &p, end, &len, ASN1_OCTET_STRING ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( ( ret = mpi_read_binary( &eck->d, p, len ) ) != 0 )
{
ecp_keypair_free( eck );
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
}
p += len;
/*
* Is 'parameters' present?
*/
if( ( ret = asn1_get_tag( &p, end, &len,
ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 0 ) ) == 0 )
{
if( ( ret = x509_get_ecparams( &p, p + len, &params) ) != 0 ||
( ret = x509_use_ecparams( &params, &eck->grp ) ) != 0 )
{
ecp_keypair_free( eck );
return( ret );
}
}
else if( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG )
{
ecp_keypair_free( eck );
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
}
/*
* Is 'publickey' present?
*/
if( ( ret = asn1_get_tag( &p, end, &len,
ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 1 ) ) == 0 )
{
end2 = p + len;
if( ( ret = asn1_get_bitstring_null( &p, end2, &len ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( p + len != end2 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT +
POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
if( ( ret = x509_get_ecpubkey( &p, end2, eck ) ) != 0 )
return( ret );
}
else if ( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG )
{
ecp_keypair_free( eck );
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
}
if( ( ret = ecp_check_privkey( &eck->grp, &eck->d ) ) != 0 )
{
ecp_keypair_free( eck );
return( ret );
}
return 0;
}
/* /*
* Parse an unencrypted PKCS#8 encoded private EC key * Parse an unencrypted PKCS#8 encoded private EC key
*/ */
static int x509parse_key_pkcs8_unencrypted_der_ec( static int x509parse_key_pkcs8_unencrypted_der_ec(
ecp_keypair *eck, ecp_keypair *ec,
const unsigned char* key, const unsigned char* key,
size_t keylen ) size_t keylen )
{ {
int ret, version; pk_context pk;
size_t len;
x509_buf alg_params;
unsigned char *p = (unsigned char *) key;
unsigned char *end = p + keylen;
pk_type_t pk_alg = POLARSSL_PK_NONE;
/* pk.type = POLARSSL_PK_ECKEY;
* This function parses the PrivatKeyInfo object (PKCS#8 v1.2 = RFC 5208) pk.data = ec;
* pk.dont_free = 1;
* PrivateKeyInfo ::= SEQUENCE {
* version Version,
* privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
* privateKey PrivateKey,
* attributes [0] IMPLICIT Attributes OPTIONAL }
*
* Version ::= INTEGER
* PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
* PrivateKey ::= OCTET STRING
*
* The PrivateKey OCTET STRING is a SEC1 ECPrivateKey
*/
if( ( ret = asn1_get_tag( &p, end, &len, return( x509parse_key_pkcs8_unencrypted_der( &pk, key, keylen ) );
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
{
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
}
end = p + len;
if( ( ret = asn1_get_int( &p, end, &version ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( version != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_VERSION + ret );
if( ( ret = x509_get_pk_alg( &p, end, &pk_alg, &alg_params ) ) != 0 )
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
if( pk_alg != POLARSSL_PK_ECKEY && pk_alg != POLARSSL_PK_ECKEY_DH )
return( POLARSSL_ERR_X509_CERT_INVALID_ALG );
if( pk_alg == POLARSSL_PK_ECKEY_DH )
eck->alg = POLARSSL_ECP_KEY_ALG_ECDH;
if( ( ret = x509_use_ecparams( &alg_params, &eck->grp ) ) != 0 )
{
ecp_keypair_free( eck );
return( ret );
}
if( ( ret = asn1_get_tag( &p, end, &len, ASN1_OCTET_STRING ) ) != 0 )
{
ecp_keypair_free( eck );
return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT + ret );
}
if( ( ret = x509parse_key_sec1_der( eck, p, len ) ) != 0 )
{
ecp_keypair_free( eck );
return( ret );
}
if( ( ret = ecp_check_privkey( &eck->grp, &eck->d ) ) != 0 )
{
ecp_keypair_free( eck );
return( ret );
}
return 0;
} }
/* /*