libpiano: Abstract out blowfish cipher to PianoCipher_t so different implementations than gcrypt can be used.

7 files changed, 86 insertions, 69 deletions

diff --git a/src/config.h b/src/config.h
index 788455c..2d335a9 100644
--- a/src/config.h
+++ b/src/config.h
@@ -6,32 +6,21 @@
 
 #define VERSION "2014.09.28-dev"
 
-/* glibc feature test macros, define _before_ including other files */
-#define _POSIX_C_SOURCE 200809L
-
-/* ffmpeg/libav quirks detection
- * ffmpeg’s micro versions always start at 100, that’s how we can distinguish
- * ffmpeg and libav */
-#include <libavfilter/version.h>
-
-/* is "timeout" option present (all versions of ffmpeg, not libav) */
-#if LIBAVFILTER_VERSION_MICRO >= 100
-#define HAVE_AV_TIMEOUT
+/* Visual C++ name restrict differently */
+#ifdef _WIN32
+#define restrict __restrict
 #endif
 
-/* does graph_send_command exist (ffmpeg >=2.2) */
-#if LIBAVFILTER_VERSION_MAJOR >= 4 && \
-		LIBAVFILTER_VERSION_MICRO >= 100
-#define HAVE_AVFILTER_GRAPH_SEND_COMMAND
+/* Visual C++ does not have inline keyword in C */
+#ifdef _WIN32
+#define inline __inline
 #endif
 
-/* need avcodec.h (ffmpeg 1.2) */
-#if LIBAVFILTER_VERSION_MAJOR == 3 && \
-		LIBAVFILTER_VERSION_MINOR <= 42 && \
-		LIBAVFILTER_VERSION_MINOR > 32 && \
-		LIBAVFILTER_VERSION_MICRO >= 100
-#define HAVE_AV_BUFFERSINK_GET_BUFFER_REF
-#define HAVE_LIBAVFILTER_AVCODEC_H
+/* Visual C++ does not have strcasecmp */
+#ifdef _WIN32
+#define strcasecmp _stricmp
 #endif
 
+#define CURL_STATICLIB
+
 #endif /* SRC_CONFIG_H_S6A1C09K */
diff --git a/src/libpiano/crypt.c b/src/libpiano/crypt.c
index 8886f17..e203812 100644
--- a/src/libpiano/crypt.c
+++ b/src/libpiano/crypt.c
@@ -29,17 +29,50 @@ THE SOFTWARE.
 
 #include "crypt.h"
 
+#include <blowfish.h>
+
+struct _PianoCipher_t {
+	BLOWFISH_CTX cipher;
+};
+
+PianoReturn_t PianoCryptInit (PianoCipher_t* h, const char * const key,
+		size_t const size) {
+	PianoCipher_t result = malloc (sizeof(BLOWFISH_CTX));
+	if (result == NULL) {
+		return PIANO_RET_OUT_OF_MEMORY;
+	}
+
+	Blowfish_Init (&result->cipher, (unsigned char*)key, size);
+
+	*h = result;
+
+	return PIANO_RET_OK;
+}
+
+void PianoCryptDestroy (PianoCipher_t h) {
+	free(h);
+}
+
+static inline bool PianoCryptDecrypt (PianoCipher_t h, unsigned char* output, size_t size) {
+	return Blowfish_DecryptData (&h->cipher, (uint32_t*)output, (uint32_t*)output, size) == BLOWFISH_OK;
+}
+
+static inline bool PianoCryptEncrypt (PianoCipher_t h, unsigned char* output, size_t size)
+{
+	return Blowfish_EncryptData (&h->cipher, (uint32_t*)output, (uint32_t*)output, size) == BLOWFISH_OK;
+}
+
 /*	decrypt hex-encoded, blowfish-crypted string: decode 2 hex-encoded blocks,
  *	decrypt, byteswap
- *	@param gcrypt handle
+ *	@param cipher handle
  *	@param hex string
  *	@param decrypted string length (without trailing NUL)
  *	@return decrypted string or NULL
  */
-char *PianoDecryptString (gcry_cipher_hd_t h, const char * const input,
+char *PianoDecryptString (PianoCipher_t h, const char * const input,
 		size_t * const retSize) {
 	size_t inputLen = strlen (input);
-	gcry_error_t gret;
+	bool ret;
 	unsigned char *output;
 	size_t outputLen = inputLen/2;
 
@@ -51,11 +84,11 @@ char *PianoDecryptString (gcry_cipher_hd_t h, const char * const input,
 		char hex[3];
 		memcpy (hex, &input[i*2], 2);
 		hex[2] = '\0';
-		output[i] = strtol (hex, NULL, 16);
+		output[i] = (unsigned char) strtol (hex, NULL, 16);
 	}
 
-	gret = gcry_cipher_decrypt (h, output, outputLen, NULL, 0);
-	if (gret) {
+	ret = PianoCryptDecrypt (h, output, outputLen);
+	if (!ret) {
 		free (output);
 		return NULL;
 	}
@@ -66,22 +99,22 @@ char *PianoDecryptString (gcry_cipher_hd_t h, const char * const input,
 }
 
 /*	blowfish-encrypt/hex-encode string
- *	@param gcrypt handle
+ *	@param cipher handle
  *	@param encrypt this
  *	@return encrypted, hex-encoded string
  */
-char *PianoEncryptString (gcry_cipher_hd_t h, const char *s) {
+char *PianoEncryptString (PianoCipher_t h, const char *s) {
 	unsigned char *paddedInput, *hexOutput;
 	size_t inputLen = strlen (s);
 	/* blowfish expects two 32 bit blocks */
 	size_t paddedInputLen = (inputLen % 8 == 0) ? inputLen : inputLen + (8-inputLen%8);
-	gcry_error_t gret;
+	bool ret;
 
 	paddedInput = calloc (paddedInputLen+1, sizeof (*paddedInput));
 	memcpy (paddedInput, s, inputLen);
 
-	gret = gcry_cipher_encrypt (h, paddedInput, paddedInputLen, NULL, 0);
-	if (gret) {
+	ret = PianoCryptEncrypt (h, paddedInput, paddedInputLen);
+	if (!ret) {
 		free (paddedInput);
 		return NULL;
 	}
diff --git a/src/libpiano/crypt.h b/src/libpiano/crypt.h
index fc7c205..890b8c1 100644
--- a/src/libpiano/crypt.h
+++ b/src/libpiano/crypt.h
@@ -24,13 +24,14 @@ THE SOFTWARE.
 #ifndef SRC_LIBPIANO_CRYPT_H_O832IVGK
 #define SRC_LIBPIANO_CRYPT_H_O832IVGK
 
-#ifdef __FreeBSD__
-#define _GCRYPT_IN_LIBGCRYPT
-#endif
-#include <gcrypt.h>
+#include "piano.h"
 
-char *PianoDecryptString (gcry_cipher_hd_t, const char * const,
+PianoReturn_t PianoCryptInit (PianoCipher_t*, const char * const,
+		size_t const);
+void PianoCryptDestroy (PianoCipher_t);
+
+char *PianoDecryptString (PianoCipher_t, const char * const,
 		size_t * const);
-char *PianoEncryptString (gcry_cipher_hd_t, const char *);
+char *PianoEncryptString (PianoCipher_t, const char *);
 
 #endif /* SRC_LIBPIANO_CRYPT_H_O832IVGK */
diff --git a/src/libpiano/piano.c b/src/libpiano/piano.c
index 72502f7..c496ea1 100644
--- a/src/libpiano/piano.c
+++ b/src/libpiano/piano.c
@@ -31,6 +31,7 @@ THE SOFTWARE.
 
 #include "piano_private.h"
 #include "piano.h"
+#include "crypt.h"
 
 /*	initialize piano handle
  *	@param piano handle
@@ -39,30 +40,24 @@ THE SOFTWARE.
 PianoReturn_t PianoInit (PianoHandle_t *ph, const char *partnerUser,
 		const char *partnerPassword, const char *device, const char *inkey,
 		const char *outkey) {
+	PianoReturn_t ret = PIANO_RET_OK;
+
 	memset (ph, 0, sizeof (*ph));
 	ph->partner.user = strdup (partnerUser);
 	ph->partner.password = strdup (partnerPassword);
 	ph->partner.device = strdup (device);
 
-	if (gcry_cipher_open (&ph->partner.in, GCRY_CIPHER_BLOWFISH,
-			GCRY_CIPHER_MODE_ECB, 0) != GPG_ERR_NO_ERROR) {
-		return PIANO_RET_GCRY_ERR;
-	}
-	if (gcry_cipher_setkey (ph->partner.in, (const unsigned char *) inkey,
-			strlen (inkey)) != GPG_ERR_NO_ERROR) {
-		return PIANO_RET_GCRY_ERR;
+	ret = PianoCryptInit (&ph->partner.in, inkey, strlen (inkey));
+	if (ret != PIANO_RET_OK) {
+		return ret;
 	}
 
-	if (gcry_cipher_open (&ph->partner.out, GCRY_CIPHER_BLOWFISH,
-			GCRY_CIPHER_MODE_ECB, 0) != GPG_ERR_NO_ERROR) {
-		return PIANO_RET_GCRY_ERR;
-	}
-	if (gcry_cipher_setkey (ph->partner.out, (const unsigned char *) outkey,
-			strlen (outkey)) != GPG_ERR_NO_ERROR) {
-		return PIANO_RET_GCRY_ERR;
+	ret = PianoCryptInit (&ph->partner.out, outkey, strlen(outkey));
+	if (ret != PIANO_RET_OK) {
+		return ret;
 	}
 
-	return PIANO_RET_OK;
+	return ret;
 }
 
 /*	destroy artist linked list
@@ -178,8 +173,8 @@ static void PianoDestroyPartner (PianoPartner_t *partner) {
 	free (partner->password);
 	free (partner->device);
 	free (partner->authToken);
-	gcry_cipher_close (partner->in);
-	gcry_cipher_close (partner->out);
+	PianoCryptDestroy (partner->in);
+	PianoCryptDestroy (partner->out);
 	memset (partner, 0, sizeof (*partner));
 }
 
@@ -267,8 +262,8 @@ const char *PianoErrorToStr (PianoReturn_t ret) {
 			return "Selected audio quality is not available.";
 			break;
 
-		case PIANO_RET_GCRY_ERR:
-			return "libgcrypt initialization failed.";
+		case PIANO_RET_CIPHER_ERR:
+			return "Cipher initialization failed.";
 			break;
 
 		/* pandora error messages */
diff --git a/src/libpiano/piano.h b/src/libpiano/piano.h
index 1a84d4a..ca33626 100644
--- a/src/libpiano/piano.h
+++ b/src/libpiano/piano.h
@@ -26,11 +26,8 @@ THE SOFTWARE.
 
 #include "../config.h"
 
+#include <stdlib.h>
 #include <stdbool.h>
-#ifdef __FreeBSD__
-#define _GCRYPT_IN_LIBGCRYPT
-#endif
-#include <gcrypt.h>
 
 /* this is our public API; don't expect this api to be stable as long as
  * pandora does not provide a stable api
@@ -44,6 +41,8 @@ THE SOFTWARE.
 #define PIANO_RPC_HOST "tuner.pandora.com"
 #define PIANO_RPC_PATH "/services/json/?"
 
+typedef struct _PianoCipher_t* PianoCipher_t;
+
 typedef struct PianoListHead {
 	struct PianoListHead *next;
 } PianoListHead_t;
@@ -124,7 +123,7 @@ typedef struct PianoGenreCategory {
 } PianoGenreCategory_t;
 
 typedef struct PianoPartner {
-	gcry_cipher_hd_t in, out;
+	PianoCipher_t in, out;
 	char *authToken, *device, *user, *password;
 	unsigned int id;
 } PianoPartner_t;
@@ -276,7 +275,7 @@ typedef enum {
 	PIANO_RET_OUT_OF_MEMORY = 4,
 	PIANO_RET_INVALID_LOGIN = 5,
 	PIANO_RET_QUALITY_UNAVAILABLE = 6,
-	PIANO_RET_GCRY_ERR = 7,
+	PIANO_RET_CIPHER_ERR = 7,
 
 	/* pandora error codes */
 	PIANO_RET_P_INTERNAL = PIANO_RET_OFFSET+0,
diff --git a/src/libpiano/request.c b/src/libpiano/request.c
index 02b4b43..a97abb5 100644
--- a/src/libpiano/request.c
+++ b/src/libpiano/request.c
@@ -24,7 +24,7 @@ THE SOFTWARE.
 #include "../config.h"
 
 #include <curl/curl.h>
-#include <json.h>
+#include <json/json.h>
 #include <assert.h>
 #include <stdio.h>
 #include <string.h>
@@ -94,7 +94,7 @@ PianoReturn_t PianoRequest (PianoHandle_t *ph, PianoRequest_t *req,
 					json_object_object_add (j, "partnerAuthToken",
 							json_object_new_string (ph->partner.authToken));
 					json_object_object_add (j, "syncTime",
-							json_object_new_int (timestamp));
+							json_object_new_int64 (timestamp));
 
 					CURL * const curl = curl_easy_init ();
 					urlencAuthToken = curl_easy_escape (curl,
@@ -487,7 +487,7 @@ PianoReturn_t PianoRequest (PianoHandle_t *ph, PianoRequest_t *req,
 		json_object_object_add (j, "userAuthToken",
 				json_object_new_string (ph->user.authToken));
 		json_object_object_add (j, "syncTime",
-				json_object_new_int (timestamp));
+				json_object_new_int64 (timestamp));
 	}
 
 	/* json to string */
diff --git a/src/libpiano/response.c b/src/libpiano/response.c
index 7f0cee0..783e2f0 100644
--- a/src/libpiano/response.c
+++ b/src/libpiano/response.c
@@ -23,7 +23,7 @@ THE SOFTWARE.
 
 #include "../config.h"
 
-#include <json.h>
+#include <json/json.h>
 #include <string.h>
 #include <assert.h>
 #include <time.h>
@@ -273,7 +273,7 @@ PianoReturn_t PianoResponse (PianoHandle_t *ph, PianoRequest_t *req) {
 				song->stationId = PianoJsonStrdup (s, "stationId");
 				song->coverArt = PianoJsonStrdup (s, "albumArtUrl");
 				song->detailUrl = PianoJsonStrdup (s, "songDetailUrl");
-				song->fileGain = json_object_get_double (
+				song->fileGain = (float)json_object_get_double (
 						json_object_object_get (s, "trackGain"));
 				song->length = json_object_get_int (
 						json_object_object_get (s, "trackLength"));