Azure IoT common library
Dependents: STM32F746_iothub_client_sample_mqtt f767zi_mqtt iothub_client_sample_amqp iothub_client_sample_http ... more
usha.c
- Committer:
- Azure.IoT Build
- Date:
- 2016-04-08
- Revision:
- 0:fa2de1b79154
- Child:
- 19:2e0811512ceb
File content as of revision 0:fa2de1b79154:
// Copyright (c) Microsoft. All rights reserved. // Licensed under the MIT license. See LICENSE file in the project root for full license information. /**************************** usha.c ****************************/ /******************** See RFC 4634 for details ******************/ /* * Description: * This file implements a unified interface to the SHA algorithms. */ #include <stdlib.h> #ifdef _CRTDBG_MAP_ALLOC #include <crtdbg.h> #endif #include "azure_c_shared_utility/gballoc.h" #include "azure_c_shared_utility/sha.h" /* * USHAReset * * Description: * This function will initialize the SHA Context in preparation * for computing a new SHA message digest. * * Parameters: * context: [in/out] * The context to reset. * whichSha: [in] * Selects which SHA reset to call * * Returns: * sha Error Code. * */ int USHAReset(USHAContext *ctx, enum SHAversion whichSha) { if (ctx) { ctx->whichSha = whichSha; switch (whichSha) { case SHA1: return SHA1Reset((SHA1Context*)&ctx->ctx); case SHA224: return SHA224Reset((SHA224Context*)&ctx->ctx); case SHA256: return SHA256Reset((SHA256Context*)&ctx->ctx); case SHA384: return SHA384Reset((SHA384Context*)&ctx->ctx); case SHA512: return SHA512Reset((SHA512Context*)&ctx->ctx); default: return shaBadParam; } } else { return shaNull; } } /* * USHAInput * * Description: * This function accepts an array of octets as the next portion * of the message. * * Parameters: * context: [in/out] * The SHA context to update * message_array: [in] * An array of characters representing the next portion of * the message. * length: [in] * The length of the message in message_array * * Returns: * sha Error Code. * */ int USHAInput(USHAContext *ctx, const uint8_t *bytes, unsigned int bytecount) { if (ctx) { switch (ctx->whichSha) { case SHA1: return SHA1Input((SHA1Context*)&ctx->ctx, bytes, bytecount); case SHA224: return SHA224Input((SHA224Context*)&ctx->ctx, bytes, bytecount); case SHA256: return SHA256Input((SHA256Context*)&ctx->ctx, bytes, bytecount); case SHA384: return SHA384Input((SHA384Context*)&ctx->ctx, bytes, bytecount); case SHA512: return SHA512Input((SHA512Context*)&ctx->ctx, bytes, bytecount); default: return shaBadParam; } } else { return shaNull; } } /* * USHAFinalBits * * Description: * This function will add in any final bits of the message. * * Parameters: * context: [in/out] * The SHA context to update * message_bits: [in] * The final bits of the message, in the upper portion of the * byte. (Use 0b###00000 instead of 0b00000### to input the * three bits ###.) * length: [in] * The number of bits in message_bits, between 1 and 7. * * Returns: * sha Error Code. */ int USHAFinalBits(USHAContext *ctx, const uint8_t bits, unsigned int bitcount) { if (ctx) { switch (ctx->whichSha) { case SHA1: return SHA1FinalBits((SHA1Context*)&ctx->ctx, bits, bitcount); case SHA224: return SHA224FinalBits((SHA224Context*)&ctx->ctx, bits, bitcount); case SHA256: return SHA256FinalBits((SHA256Context*)&ctx->ctx, bits, bitcount); case SHA384: return SHA384FinalBits((SHA384Context*)&ctx->ctx, bits, bitcount); case SHA512: return SHA512FinalBits((SHA512Context*)&ctx->ctx, bits, bitcount); default: return shaBadParam; } } else { return shaNull; } } /* * USHAResult * * Description: * This function will return the 160-bit message digest into the * Message_Digest array provided by the caller. * NOTE: The first octet of hash is stored in the 0th element, * the last octet of hash in the 19th element. * * Parameters: * context: [in/out] * The context to use to calculate the SHA-1 hash. * Message_Digest: [out] * Where the digest is returned. * * Returns: * sha Error Code. * */ int USHAResult(USHAContext *ctx, uint8_t Message_Digest[USHAMaxHashSize]) { if (ctx) { switch (ctx->whichSha) { case SHA1: return SHA1Result((SHA1Context*)&ctx->ctx, Message_Digest); case SHA224: return SHA224Result((SHA224Context*)&ctx->ctx, Message_Digest); case SHA256: return SHA256Result((SHA256Context*)&ctx->ctx, Message_Digest); case SHA384: return SHA384Result((SHA384Context*)&ctx->ctx, Message_Digest); case SHA512: return SHA512Result((SHA512Context*)&ctx->ctx, Message_Digest); default: return shaBadParam; } } else { return shaNull; } } /* * USHABlockSize * * Description: * This function will return the blocksize for the given SHA * algorithm. * * Parameters: * whichSha: * which SHA algorithm to query * * Returns: * block size * */ int USHABlockSize(enum SHAversion whichSha) { switch (whichSha) { case SHA1: return SHA1_Message_Block_Size; case SHA224: return SHA224_Message_Block_Size; case SHA256: return SHA256_Message_Block_Size; case SHA384: return SHA384_Message_Block_Size; default: case SHA512: return SHA512_Message_Block_Size; } } /* * USHAHashSize * * Description: * This function will return the hashsize for the given SHA * algorithm. * * Parameters: * whichSha: * which SHA algorithm to query * * Returns: * hash size * */ int USHAHashSize(enum SHAversion whichSha) { switch (whichSha) { case SHA1: return SHA1HashSize; case SHA224: return SHA224HashSize; case SHA256: return SHA256HashSize; case SHA384: return SHA384HashSize; default: case SHA512: return SHA512HashSize; } } /* * USHAHashSizeBits * * Description: * This function will return the hashsize for the given SHA * algorithm, expressed in bits. * * Parameters: * whichSha: * which SHA algorithm to query * * Returns: * hash size in bits * */ int USHAHashSizeBits(enum SHAversion whichSha) { switch (whichSha) { case SHA1: return SHA1HashSizeBits; case SHA224: return SHA224HashSizeBits; case SHA256: return SHA256HashSizeBits; case SHA384: return SHA384HashSizeBits; default: case SHA512: return SHA512HashSizeBits; } }