/* * Parse a private key */ int mbedtls_pk_parse_key( mbedtls_pk_context *pk, const unsigned char *key, size_t keylen, const unsigned char *pwd, size_t pwdlen ) { int ret; const mbedtls_pk_info_t *pk_info; #if defined(MBEDTLS_PEM_PARSE_C) size_t len; mbedtls_pem_context pem; mbedtls_pem_init( &pem ); #if defined(MBEDTLS_RSA_C) /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */ if( keylen == 0 || key[keylen - 1] != '\0' ) ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT; else ret = mbedtls_pem_read_buffer( &pem, "-----BEGIN RSA PRIVATE KEY-----", "-----END RSA PRIVATE KEY-----", key, pwd, pwdlen, &len ); if( ret == 0 ) { if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL ) return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG ); if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 || ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), pem.buf, pem.buflen ) ) != 0 ) { mbedtls_pk_free( pk ); } mbedtls_pem_free( &pem ); return( ret ); } else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH ) return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH ); else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED ) return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED ); else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT ) return( ret ); #endif /* MBEDTLS_RSA_C */ #if defined(MBEDTLS_ECP_C) /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */ if( keylen == 0 || key[keylen - 1] != '\0' ) ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT; else ret = mbedtls_pem_read_buffer( &pem, "-----BEGIN EC PRIVATE KEY-----", "-----END EC PRIVATE KEY-----", key, pwd, pwdlen, &len ); if( ret == 0 ) { if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL ) return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG ); if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 || ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), pem.buf, pem.buflen ) ) != 0 ) { mbedtls_pk_free( pk ); } mbedtls_pem_free( &pem ); return( ret ); } else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH ) return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH ); else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED ) return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED ); else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT ) return( ret ); #endif /* MBEDTLS_ECP_C */ /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */ if( keylen == 0 || key[keylen - 1] != '\0' ) ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT; else ret = mbedtls_pem_read_buffer( &pem, "-----BEGIN PRIVATE KEY-----", "-----END PRIVATE KEY-----", key, NULL, 0, &len ); if( ret == 0 ) { if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk, pem.buf, pem.buflen ) ) != 0 ) { mbedtls_pk_free( pk ); } mbedtls_pem_free( &pem ); return( ret ); } else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT ) return( ret ); #if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C) /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */ if( keylen == 0 || key[keylen - 1] != '\0' ) ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT; else ret = mbedtls_pem_read_buffer( &pem, "-----BEGIN ENCRYPTED PRIVATE KEY-----", "-----END ENCRYPTED PRIVATE KEY-----", key, NULL, 0, &len ); if( ret == 0 ) { if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk, pem.buf, pem.buflen, pwd, pwdlen ) ) != 0 ) { mbedtls_pk_free( pk ); } mbedtls_pem_free( &pem ); return( ret ); } else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT ) return( ret ); #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */ #else ((void) ret); ((void) pwd); ((void) pwdlen); #endif /* MBEDTLS_PEM_PARSE_C */ /* * At this point we only know it's not a PEM formatted key. Could be any * of the known DER encoded private key formats * * We try the different DER format parsers to see if one passes without * error */ #if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C) if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk, key, keylen, pwd, pwdlen ) ) == 0 ) { return( 0 ); } mbedtls_pk_free( pk ); if( ret == MBEDTLS_ERR_PK_PASSWORD_MISMATCH ) { return( ret ); } #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */ if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk, key, keylen ) ) == 0 ) return( 0 ); mbedtls_pk_free( pk ); #if defined(MBEDTLS_RSA_C) if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL ) return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG ); if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 || ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), key, keylen ) ) == 0 ) { return( 0 ); } mbedtls_pk_free( pk ); #endif /* MBEDTLS_RSA_C */ #if defined(MBEDTLS_ECP_C) if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL ) return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG ); if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 || ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), key, keylen ) ) == 0 ) { return( 0 ); } mbedtls_pk_free( pk ); #endif /* MBEDTLS_ECP_C */ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT ); }
/* * Parse a private key */ int pk_parse_key( pk_context *pk, const unsigned char *key, size_t keylen, const unsigned char *pwd, size_t pwdlen ) { int ret; const pk_info_t *pk_info; #if defined(POLARSSL_PEM_PARSE_C) size_t len; pem_context pem; pem_init( &pem ); #if defined(POLARSSL_RSA_C) ret = pem_read_buffer( &pem, "-----BEGIN RSA PRIVATE KEY-----", "-----END RSA PRIVATE KEY-----", key, pwd, pwdlen, &len ); if( ret == 0 ) { if( ( pk_info = pk_info_from_type( POLARSSL_PK_RSA ) ) == NULL ) return( POLARSSL_ERR_PK_UNKNOWN_PK_ALG ); if( ( ret = pk_init_ctx( pk, pk_info ) ) != 0 || ( ret = pk_parse_key_pkcs1_der( pk_rsa( *pk ), pem.buf, pem.buflen ) ) != 0 ) { pk_free( pk ); } pem_free( &pem ); return( ret ); } else if( ret == POLARSSL_ERR_PEM_PASSWORD_MISMATCH ) return( POLARSSL_ERR_PK_PASSWORD_MISMATCH ); else if( ret == POLARSSL_ERR_PEM_PASSWORD_REQUIRED ) return( POLARSSL_ERR_PK_PASSWORD_REQUIRED ); else if( ret != POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT ) return( ret ); #endif /* POLARSSL_RSA_C */ #if defined(POLARSSL_ECP_C) ret = pem_read_buffer( &pem, "-----BEGIN EC PRIVATE KEY-----", "-----END EC PRIVATE KEY-----", key, pwd, pwdlen, &len ); if( ret == 0 ) { if( ( pk_info = pk_info_from_type( POLARSSL_PK_ECKEY ) ) == NULL ) return( POLARSSL_ERR_PK_UNKNOWN_PK_ALG ); if( ( ret = pk_init_ctx( pk, pk_info ) ) != 0 || ( ret = pk_parse_key_sec1_der( pk_ec( *pk ), pem.buf, pem.buflen ) ) != 0 ) { pk_free( pk ); } pem_free( &pem ); return( ret ); } else if( ret == POLARSSL_ERR_PEM_PASSWORD_MISMATCH ) return( POLARSSL_ERR_PK_PASSWORD_MISMATCH ); else if( ret == POLARSSL_ERR_PEM_PASSWORD_REQUIRED ) return( POLARSSL_ERR_PK_PASSWORD_REQUIRED ); else if( ret != POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT ) return( ret ); #endif /* POLARSSL_ECP_C */ ret = pem_read_buffer( &pem, "-----BEGIN PRIVATE KEY-----", "-----END PRIVATE KEY-----", key, NULL, 0, &len ); if( ret == 0 ) { if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk, pem.buf, pem.buflen ) ) != 0 ) { pk_free( pk ); } pem_free( &pem ); return( ret ); } else if( ret != POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT ) return( ret ); ret = pem_read_buffer( &pem, "-----BEGIN ENCRYPTED PRIVATE KEY-----", "-----END ENCRYPTED PRIVATE KEY-----", key, NULL, 0, &len ); if( ret == 0 ) { if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk, pem.buf, pem.buflen, pwd, pwdlen ) ) != 0 ) { pk_free( pk ); } pem_free( &pem ); return( ret ); } else if( ret != POLARSSL_ERR_PEM_NO_HEADER_FOOTER_PRESENT ) return( ret ); #else ((void) pwd); ((void) pwdlen); #endif /* POLARSSL_PEM_PARSE_C */ /* * At this point we only know it's not a PEM formatted key. Could be any * of the known DER encoded private key formats * * We try the different DER format parsers to see if one passes without * error */ if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk, key, keylen, pwd, pwdlen ) ) == 0 ) { return( 0 ); } pk_free( pk ); if( ret == POLARSSL_ERR_PK_PASSWORD_MISMATCH ) { return( ret ); } if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk, key, keylen ) ) == 0 ) return( 0 ); pk_free( pk ); #if defined(POLARSSL_RSA_C) if( ( pk_info = pk_info_from_type( POLARSSL_PK_RSA ) ) == NULL ) return( POLARSSL_ERR_PK_UNKNOWN_PK_ALG ); if( ( ret = pk_init_ctx( pk, pk_info ) ) != 0 || ( ret = pk_parse_key_pkcs1_der( pk_rsa( *pk ), key, keylen ) ) == 0 ) { return( 0 ); } pk_free( pk ); #endif /* POLARSSL_RSA_C */ #if defined(POLARSSL_ECP_C) if( ( pk_info = pk_info_from_type( POLARSSL_PK_ECKEY ) ) == NULL ) return( POLARSSL_ERR_PK_UNKNOWN_PK_ALG ); if( ( ret = pk_init_ctx( pk, pk_info ) ) != 0 || ( ret = pk_parse_key_sec1_der( pk_ec( *pk ), key, keylen ) ) == 0 ) { return( 0 ); } pk_free( pk ); #endif /* POLARSSL_ECP_C */ return( POLARSSL_ERR_PK_KEY_INVALID_FORMAT ); }